[AMDGPU][SDag] Better lowering for 64-bit ctlz/cttz

[hliao]

LGTM

llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp

 
 static bool isCttzOpc(unsigned Opc) {
   return Opc == ISD::CTTZ || Opc == ISD::CTTZ_ZERO_UNDEF;
 }
 
 SDValue AMDGPUTargetLowering::LowerCTLZ_CTTZ(SDValue Op, SelectionDAG &DAG) const {
   SDLoc SL(Op);
   SDValue Src = Op.getOperand(0);
-  bool ZeroUndef = Op.getOpcode() == ISD::CTTZ_ZERO_UNDEF ||
-                   Op.getOpcode() == ISD::CTLZ_ZERO_UNDEF;
 
-  unsigned ISDOpc, NewOpc;
-  if (isCtlzOpc(Op.getOpcode())) {
-    ISDOpc = ISD::CTLZ_ZERO_UNDEF;
-    NewOpc = AMDGPUISD::FFBH_U32;
-  } else if (isCttzOpc(Op.getOpcode())) {
-    ISDOpc = ISD::CTTZ_ZERO_UNDEF;
-    NewOpc = AMDGPUISD::FFBL_B32;
-  } else
-    llvm_unreachable("Unexpected OPCode!!!");
+  assert(isCtlzOpc(Op.getOpcode()) || isCttzOpc(Op.getOpcode()));
+  bool Ctlz = isCtlzOpc(Op.getOpcode());
+  unsigned NewOpc = Ctlz ? AMDGPUISD::FFBH_U32 : AMDGPUISD::FFBL_B32;
 
+  bool ZeroUndef = Op.getOpcode() == ISD::CTLZ_ZERO_UNDEF ||
+                   Op.getOpcode() == ISD::CTTZ_ZERO_UNDEF;
 
-  if (ZeroUndef && Src.getValueType() == MVT::i32)
+  if (Src.getValueType() == MVT::i32) {
+    assert(ZeroUndef);
     return DAG.getNode(NewOpc, SL, MVT::i32, Src);
-
-  const SDValue Zero = DAG.getConstant(0, SL, MVT::i32);
+  }
 
   SDValue Lo, Hi;
   std::tie(Lo, Hi) = split64BitValue(Src, DAG);
 
-  EVT SetCCVT = getSetCCResultType(DAG.getDataLayout(),
-                                   *DAG.getContext(), MVT::i32);
-
-  SDValue HiOrLo = isCtlzOpc(Op.getOpcode()) ? Hi : Lo;
-  SDValue Hi0orLo0 = DAG.getSetCC(SL, SetCCVT, HiOrLo, Zero, ISD::SETEQ);
-
-  SDValue OprLo = DAG.getNode(ISDOpc, SL, MVT::i32, Lo);
-  SDValue OprHi = DAG.getNode(ISDOpc, SL, MVT::i32, Hi);
+  SDValue OprLo = DAG.getNode(NewOpc, SL, MVT::i32, Lo);
+  SDValue OprHi = DAG.getNode(NewOpc, SL, MVT::i32, Hi);
 
-  const SDValue Bits32 = DAG.getConstant(32, SL, MVT::i32);
-  SDValue Add, NewOpr;
-  if (isCtlzOpc(Op.getOpcode())) {
-    Add = DAG.getNode(ISD::ADD, SL, MVT::i32, OprLo, Bits32);
-    // ctlz(x) = hi_32(x) == 0 ? ctlz(lo_32(x)) + 32 : ctlz(hi_32(x))
-    NewOpr = DAG.getNode(ISD::SELECT, SL, MVT::i32, Hi0orLo0, Add, OprHi);
-  } else {
-    Add = DAG.getNode(ISD::ADD, SL, MVT::i32, OprHi, Bits32);
-    // cttz(x) = lo_32(x) == 0 ? cttz(hi_32(x)) + 32 : cttz(lo_32(x))
-    NewOpr = DAG.getNode(ISD::SELECT, SL, MVT::i32, Hi0orLo0, Add, OprLo);
-  }
+  // (ctlz hi:lo) -> (umin3 (ffbh hi), (uaddsat (ffbh lo), 32), 64)
+  // (cttz hi:lo) -> (umin3 (uaddsat (ffbl hi), 32), (ffbl lo), 64)
+  // (ctlz_zero_undef hi:lo) -> (umin (ffbh hi), (add (ffbh lo), 32))
+  // (cttz_zero_undef hi:lo) -> (umin (add (ffbl hi), 32), (ffbl lo))
+
+  unsigned AddOpc = ZeroUndef ? ISD::ADD : ISD::UADDSAT;
+  const SDValue Const32 = DAG.getConstant(32, SL, MVT::i32);
+  if (Ctlz)
+    OprLo = DAG.getNode(AddOpc, SL, MVT::i32, OprLo, Const32);
+  else
+    OprHi = DAG.getNode(AddOpc, SL, MVT::i32, OprHi, Const32);
 
+  SDValue NewOpr;
+  NewOpr = DAG.getNode(ISD::UMIN, SL, MVT::i32, OprLo, OprHi);
   if (!ZeroUndef) {
-    // Test if the full 64-bit input is zero.
-
-    // FIXME: DAG combines turn what should be an s_and_b64 into a v_or_b32,
-    // which we probably don't want.
-    SDValue LoOrHi = isCtlzOpc(Op.getOpcode()) ? Lo : Hi;
-    SDValue Lo0OrHi0 = DAG.getSetCC(SL, SetCCVT, LoOrHi, Zero, ISD::SETEQ);
-    SDValue SrcIsZero = DAG.getNode(ISD::AND, SL, SetCCVT, Lo0OrHi0, Hi0orLo0);
-
-    // TODO: If i64 setcc is half rate, it can result in 1 fewer instruction
-    // with the same cycles, otherwise it is slower.
-    // SDValue SrcIsZero = DAG.getSetCC(SL, SetCCVT, Src,
-    // DAG.getConstant(0, SL, MVT::i64), ISD::SETEQ);
-
-    const SDValue Bits32 = DAG.getConstant(64, SL, MVT::i32);
-
-    // The instruction returns -1 for 0 input, but the defined intrinsic
-    // behavior is to return the number of bits.
-    NewOpr = DAG.getNode(ISD::SELECT, SL, MVT::i32,
-                         SrcIsZero, Bits32, NewOpr);
+    const SDValue Const64 = DAG.getConstant(64, SL, MVT::i32);
+    NewOpr = DAG.getNode(ISD::UMIN, SL, MVT::i32, NewOpr, Const64);
   }
 
   return DAG.getNode(ISD::ZERO_EXTEND, SL, MVT::i64, NewOpr);
 }
 
 SDValue AMDGPUTargetLowering::LowerINT_TO_FP32(SDValue Op, SelectionDAG &DAG,
                                                bool Signed) const {
   // The regular method coverting a 64-bit integer to float roughly consists of

llvm/test/CodeGen/AMDGPU/ctlz.ll

 define amdgpu_kernel void @s_ctlz_i64(i64 addrspace(1)* noalias %out, [8 x i32], i64 %val) nounwind {
 ; SI-LABEL: s_ctlz_i64:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x13
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
 ; SI-NEXT:    s_mov_b32 s2, -1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
-; SI-NEXT:    s_flbit_i32_b32 s6, s4
-; SI-NEXT:    s_flbit_i32_b32 s7, s5
-; SI-NEXT:    s_add_i32 s6, s6, 32
-; SI-NEXT:    s_or_b32 s4, s4, s5
-; SI-NEXT:    v_mov_b32_e32 v0, s7
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s5, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
-; SI-NEXT:    v_cmp_ne_u32_e64 vcc, s4, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; SI-NEXT:    s_flbit_i32_b32 s4, s4
+; SI-NEXT:    s_flbit_i32_b32 s5, s5
+; SI-NEXT:    s_min_u32 s4, s4, 0xffffffdf
+; SI-NEXT:    v_mov_b32_e32 v0, s5
+; SI-NEXT:    s_add_i32 s4, s4, 32
+; SI-NEXT:    v_min3_u32 v0, s4, v0, 64
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
 ; SI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_ctlz_i64:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x4c
 ; VI-NEXT:    s_mov_b32 s7, 0xf000
 ; VI-NEXT:    s_mov_b32 s6, -1
 ; VI-NEXT:    v_mov_b32_e32 v1, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    s_flbit_i32_b32 s2, s0
-; VI-NEXT:    s_add_i32 s2, s2, 32
-; VI-NEXT:    s_flbit_i32_b32 s3, s1
-; VI-NEXT:    s_cmp_eq_u32 s1, 0
-; VI-NEXT:    s_cselect_b32 s2, s2, s3
-; VI-NEXT:    s_or_b32 s0, s0, s1
-; VI-NEXT:    s_cmp_lg_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s0, s2, 64
-; VI-NEXT:    v_mov_b32_e32 v0, s0
+; VI-NEXT:    s_flbit_i32_b32 s0, s0
+; VI-NEXT:    v_add_u32_e64 v0, s[2:3], s0, 32 clamp
+; VI-NEXT:    s_flbit_i32_b32 s0, s1
+; VI-NEXT:    v_min3_u32 v0, v0, s0, 64
 ; VI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_ctlz_i64:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 9, @4, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    MEM_RAT_CACHELESS STORE_RAW T0.XY, T1.X, 1
 ; EG-NEXT:    CF_END

 ; GFX10-LABEL: s_ctlz_i64:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_clause 0x1
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x4c
 ; GFX10-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; GFX10-NEXT:    v_mov_b32_e32 v1, 0
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    s_flbit_i32_b32 s0, s2
-; GFX10-NEXT:    s_flbit_i32_b32 s1, s3
-; GFX10-NEXT:    s_add_i32 s0, s0, 32
-; GFX10-NEXT:    s_cmp_eq_u32 s3, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, s1
-; GFX10-NEXT:    s_or_b32 s1, s2, s3
-; GFX10-NEXT:    s_cmp_lg_u32 s1, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, 64
-; GFX10-NEXT:    v_mov_b32_e32 v0, s0
+; GFX10-NEXT:    v_add_nc_u32_e64 v0, s0, 32 clamp
+; GFX10-NEXT:    s_flbit_i32_b32 s0, s3
+; GFX10-NEXT:    v_min3_u32 v0, v0, s0, 64
 ; GFX10-NEXT:    global_store_dwordx2 v1, v[0:1], s[4:5]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: s_ctlz_i64:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_clause 0x1
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x4c
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24

 define amdgpu_kernel void @s_ctlz_i64_trunc(i32 addrspace(1)* noalias %out, i64 %val) nounwind {
 ; SI-LABEL: s_ctlz_i64_trunc:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0xb
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
 ; SI-NEXT:    s_mov_b32 s2, -1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
-; SI-NEXT:    s_flbit_i32_b32 s6, s4
-; SI-NEXT:    s_flbit_i32_b32 s7, s5
-; SI-NEXT:    s_add_i32 s6, s6, 32
-; SI-NEXT:    s_or_b32 s4, s4, s5
-; SI-NEXT:    v_mov_b32_e32 v0, s7
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s5, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
-; SI-NEXT:    v_cmp_ne_u32_e64 vcc, s4, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; SI-NEXT:    s_flbit_i32_b32 s4, s4
+; SI-NEXT:    s_min_u32 s4, s4, 0xffffffdf
+; SI-NEXT:    s_flbit_i32_b32 s5, s5
+; SI-NEXT:    s_add_i32 s4, s4, 32
+; SI-NEXT:    v_mov_b32_e32 v0, s5
+; SI-NEXT:    v_min3_u32 v0, s4, v0, 64
 ; SI-NEXT:    buffer_store_dword v0, off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_ctlz_i64_trunc:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    s_mov_b32 s7, 0xf000
 ; VI-NEXT:    s_mov_b32 s6, -1
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    s_flbit_i32_b32 s2, s0
-; VI-NEXT:    s_add_i32 s2, s2, 32
-; VI-NEXT:    s_flbit_i32_b32 s3, s1
-; VI-NEXT:    s_cmp_eq_u32 s1, 0
-; VI-NEXT:    s_cselect_b32 s2, s2, s3
-; VI-NEXT:    s_or_b32 s0, s0, s1
-; VI-NEXT:    s_cmp_lg_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s0, s2, 64
-; VI-NEXT:    v_mov_b32_e32 v0, s0
+; VI-NEXT:    s_flbit_i32_b32 s0, s0
+; VI-NEXT:    v_add_u32_e64 v0, s[2:3], s0, 32 clamp
+; VI-NEXT:    s_flbit_i32_b32 s0, s1
+; VI-NEXT:    v_min3_u32 v0, v0, s0, 64
 ; VI-NEXT:    buffer_store_dword v0, off, s[4:7], 0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_ctlz_i64_trunc:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 8, @4, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    MEM_RAT_CACHELESS STORE_RAW T0.X, T1.X, 1
 ; EG-NEXT:    CF_END

 ; EG-NEXT:     LSHR * T1.X, KC0[2].Y, literal.x,
 ; EG-NEXT:    2(2.802597e-45), 0(0.000000e+00)
 ;
 ; GFX10-LABEL: s_ctlz_i64_trunc:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_clause 0x1
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
-; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    v_mov_b32_e32 v1, 0
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    s_flbit_i32_b32 s0, s2
-; GFX10-NEXT:    s_flbit_i32_b32 s1, s3
-; GFX10-NEXT:    s_add_i32 s0, s0, 32
-; GFX10-NEXT:    s_cmp_eq_u32 s3, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, s1
-; GFX10-NEXT:    s_or_b32 s1, s2, s3
-; GFX10-NEXT:    s_cmp_lg_u32 s1, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, 64
-; GFX10-NEXT:    v_mov_b32_e32 v1, s0
-; GFX10-NEXT:    global_store_dword v0, v1, s[4:5]
+; GFX10-NEXT:    v_add_nc_u32_e64 v0, s0, 32 clamp
+; GFX10-NEXT:    s_flbit_i32_b32 s0, s3
+; GFX10-NEXT:    v_min3_u32 v0, v0, s0, 64
+; GFX10-NEXT:    global_store_dword v1, v0, s[4:5]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: s_ctlz_i64_trunc:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_clause 0x1
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; GFX10-GISEL-NEXT:    v_mov_b32_e32 v1, 0

 ; SI-NEXT:    s_mov_b32 s7, 0xf000
 ; SI-NEXT:    s_mov_b32 s6, 0
 ; SI-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_load_dwordx2 v[2:3], v[0:1], s[4:7], 0 addr64
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; SI-NEXT:    s_waitcnt vmcnt(0)
-; SI-NEXT:    v_ffbh_u32_e32 v4, v2
-; SI-NEXT:    v_ffbh_u32_e32 v5, v3
-; SI-NEXT:    v_or_b32_e32 v2, v2, v3
-; SI-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v3
-; SI-NEXT:    v_cndmask_b32_e32 v3, v5, v4, vcc
-; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v2
-; SI-NEXT:    v_cndmask_b32_e32 v2, 64, v3, vcc
+; SI-NEXT:    v_ffbh_u32_e32 v2, v2
+; SI-NEXT:    v_min_u32_e32 v2, 0xffffffdf, v2
+; SI-NEXT:    v_add_i32_e32 v2, vcc, 32, v2
+; SI-NEXT:    v_ffbh_u32_e32 v3, v3
+; SI-NEXT:    v_min3_u32 v2, v2, v3, 64
 ; SI-NEXT:    v_mov_b32_e32 v3, v1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_store_dwordx2 v[2:3], v[0:1], s[4:7], 0 addr64
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_ctlz_i64:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_lshlrev_b32_e32 v3, 3, v0
-; VI-NEXT:    v_mov_b32_e32 v4, 0
 ; VI-NEXT:    v_mov_b32_e32 v2, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    v_mov_b32_e32 v5, s3
+; VI-NEXT:    v_mov_b32_e32 v4, s3
 ; VI-NEXT:    v_mov_b32_e32 v1, s1
 ; VI-NEXT:    v_add_u32_e32 v0, vcc, s0, v3
-; VI-NEXT:    v_addc_u32_e32 v1, vcc, v1, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v1, vcc, 0, v1, vcc
 ; VI-NEXT:    flat_load_dwordx2 v[0:1], v[0:1]
 ; VI-NEXT:    v_add_u32_e32 v3, vcc, s2, v3
-; VI-NEXT:    v_addc_u32_e32 v4, vcc, v5, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v4, vcc, 0, v4, vcc
 ; VI-NEXT:    s_waitcnt vmcnt(0)
-; VI-NEXT:    v_ffbh_u32_e32 v5, v0
-; VI-NEXT:    v_add_u32_e32 v5, vcc, 32, v5
-; VI-NEXT:    v_ffbh_u32_e32 v6, v1
-; VI-NEXT:    v_or_b32_e32 v0, v0, v1
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; VI-NEXT:    v_cndmask_b32_e32 v1, v6, v5, vcc
-; VI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v0
-; VI-NEXT:    v_cndmask_b32_e32 v1, 64, v1, vcc
+; VI-NEXT:    v_ffbh_u32_e32 v0, v0
+; VI-NEXT:    v_add_u32_e64 v0, s[0:1], v0, 32 clamp
+; VI-NEXT:    v_ffbh_u32_e32 v1, v1
+; VI-NEXT:    v_min3_u32 v1, v0, v1, 64
 ; VI-NEXT:    flat_store_dwordx2 v[3:4], v[1:2]
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_ctlz_i64:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 2, @8, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    TEX 0 @6
 ; EG-NEXT:    ALU 10, @11, KC0[CB0:0-32], KC1[]

 ; GFX10-LABEL: v_ctlz_i64:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-NEXT:    v_lshlrev_b32_e32 v2, 3, v0
 ; GFX10-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    global_load_dwordx2 v[0:1], v2, s[2:3]
 ; GFX10-NEXT:    s_waitcnt vmcnt(0)
-; GFX10-NEXT:    v_ffbh_u32_e32 v3, v0
-; GFX10-NEXT:    v_ffbh_u32_e32 v4, v1
-; GFX10-NEXT:    v_or_b32_e32 v0, v0, v1
-; GFX10-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v1
-; GFX10-NEXT:    v_add_nc_u32_e32 v3, 32, v3
-; GFX10-NEXT:    v_cndmask_b32_e32 v1, v4, v3, vcc_lo
-; GFX10-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v0
-; GFX10-NEXT:    v_cndmask_b32_e32 v0, 64, v1, vcc_lo
+; GFX10-NEXT:    v_ffbh_u32_e32 v0, v0
+; GFX10-NEXT:    v_ffbh_u32_e32 v1, v1
+; GFX10-NEXT:    v_add_nc_u32_e64 v0, v0, 32 clamp
+; GFX10-NEXT:    v_min3_u32 v0, v0, v1, 64
 ; GFX10-NEXT:    v_mov_b32_e32 v1, 0
 ; GFX10-NEXT:    global_store_dwordx2 v2, v[0:1], s[0:1]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: v_ctlz_i64:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-GISEL-NEXT:    v_lshlrev_b32_e32 v3, 3, v0

 ; SI-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; SI-NEXT:    v_mov_b32_e32 v2, 0
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_load_dwordx2 v[3:4], v[1:2], s[4:7], 0 addr64
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; SI-NEXT:    v_lshlrev_b32_e32 v1, 2, v0
 ; SI-NEXT:    s_waitcnt vmcnt(0)
 ; SI-NEXT:    v_ffbh_u32_e32 v0, v3
-; SI-NEXT:    v_ffbh_u32_e32 v5, v4
-; SI-NEXT:    v_or_b32_e32 v3, v3, v4
+; SI-NEXT:    v_min_u32_e32 v0, 0xffffffdf, v0
 ; SI-NEXT:    v_add_i32_e32 v0, vcc, 32, v0
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v4
-; SI-NEXT:    v_cndmask_b32_e32 v0, v5, v0, vcc
-; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v3
-; SI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; SI-NEXT:    v_ffbh_u32_e32 v3, v4
+; SI-NEXT:    v_min3_u32 v0, v0, v3, 64
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_store_dword v0, v[1:2], s[4:7], 0 addr64
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_ctlz_i64_trunc:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
-; VI-NEXT:    v_mov_b32_e32 v4, 0
 ; VI-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    v_mov_b32_e32 v5, s3
+; VI-NEXT:    v_mov_b32_e32 v4, s3
 ; VI-NEXT:    v_mov_b32_e32 v2, s1
 ; VI-NEXT:    v_add_u32_e32 v1, vcc, s0, v1
-; VI-NEXT:    v_addc_u32_e32 v2, vcc, v2, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v2, vcc, 0, v2, vcc
 ; VI-NEXT:    flat_load_dwordx2 v[1:2], v[1:2]
 ; VI-NEXT:    v_add_u32_e32 v3, vcc, s2, v0
-; VI-NEXT:    v_addc_u32_e32 v4, vcc, v5, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v4, vcc, 0, v4, vcc
 ; VI-NEXT:    s_waitcnt vmcnt(0)
 ; VI-NEXT:    v_ffbh_u32_e32 v0, v1
-; VI-NEXT:    v_add_u32_e32 v0, vcc, 32, v0
-; VI-NEXT:    v_ffbh_u32_e32 v5, v2
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v2
-; VI-NEXT:    v_or_b32_e32 v1, v1, v2
-; VI-NEXT:    v_cndmask_b32_e32 v0, v5, v0, vcc
-; VI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v1
-; VI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; VI-NEXT:    v_add_u32_e64 v0, s[0:1], v0, 32 clamp
+; VI-NEXT:    v_ffbh_u32_e32 v1, v2
+; VI-NEXT:    v_min3_u32 v0, v0, v1, 64
 ; VI-NEXT:    flat_store_dword v[3:4], v0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_ctlz_i64_trunc:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 2, @8, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    TEX 0 @6
 ; EG-NEXT:    ALU 10, @11, KC0[CB0:0-32], KC1[]

 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; GFX10-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24
 ; GFX10-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    global_load_dwordx2 v[1:2], v1, s[2:3]
 ; GFX10-NEXT:    s_waitcnt vmcnt(0)
-; GFX10-NEXT:    v_ffbh_u32_e32 v3, v1
-; GFX10-NEXT:    v_ffbh_u32_e32 v4, v2
-; GFX10-NEXT:    v_or_b32_e32 v1, v1, v2
-; GFX10-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v2
-; GFX10-NEXT:    v_add_nc_u32_e32 v3, 32, v3
-; GFX10-NEXT:    v_cndmask_b32_e32 v2, v4, v3, vcc_lo
-; GFX10-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v1
-; GFX10-NEXT:    v_cndmask_b32_e32 v1, 64, v2, vcc_lo
+; GFX10-NEXT:    v_ffbh_u32_e32 v1, v1
+; GFX10-NEXT:    v_ffbh_u32_e32 v2, v2
+; GFX10-NEXT:    v_add_nc_u32_e64 v1, v1, 32 clamp
+; GFX10-NEXT:    v_min3_u32 v1, v1, v2, 64
 ; GFX10-NEXT:    global_store_dword v0, v1, s[0:1]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: v_ctlz_i64_trunc:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-GISEL-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24

llvm/test/CodeGen/AMDGPU/ctlz_zero_undef.ll

 }
 
 define amdgpu_kernel void @s_ctlz_zero_undef_i64(i64 addrspace(1)* noalias %out, [8 x i32], i64 %val) nounwind {
 ; SI-LABEL: s_ctlz_zero_undef_i64:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x13
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
-; SI-NEXT:    s_waitcnt lgkmcnt(0)
-; SI-NEXT:    s_flbit_i32_b32 s2, s4
-; SI-NEXT:    s_flbit_i32_b32 s4, s5
-; SI-NEXT:    s_add_i32 s6, s2, 32
 ; SI-NEXT:    s_mov_b32 s2, -1
-; SI-NEXT:    v_mov_b32_e32 v0, s4
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s5, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
+; SI-NEXT:    s_waitcnt lgkmcnt(0)
+; SI-NEXT:    s_flbit_i32_b32 s4, s4
+; SI-NEXT:    s_flbit_i32_b32 s5, s5
+; SI-NEXT:    s_add_i32 s4, s4, 32
+; SI-NEXT:    s_min_u32 s4, s4, s5
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
+; SI-NEXT:    v_mov_b32_e32 v0, s4
 ; SI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_ctlz_zero_undef_i64:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x4c
 ; VI-NEXT:    v_mov_b32_e32 v1, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
 ; VI-NEXT:    v_mov_b32_e32 v2, s2
 ; VI-NEXT:    s_flbit_i32_b32 s0, s0
+; VI-NEXT:    s_flbit_i32_b32 s1, s1
 ; VI-NEXT:    s_add_i32 s0, s0, 32
-; VI-NEXT:    s_flbit_i32_b32 s4, s1
-; VI-NEXT:    s_cmp_eq_u32 s1, 0
-; VI-NEXT:    s_cselect_b32 s0, s0, s4
+; VI-NEXT:    s_min_u32 s0, s0, s1
 ; VI-NEXT:    v_mov_b32_e32 v0, s0
 ; VI-NEXT:    v_mov_b32_e32 v3, s3
 ; VI-NEXT:    flat_store_dwordx2 v[2:3], v[0:1]
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_ctlz_zero_undef_i64:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 7, @4, KC0[CB0:0-32], KC1[]

 ; SI-LABEL: s_ctlz_zero_undef_i64_trunc:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0xb
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    s_flbit_i32_b32 s2, s4
 ; SI-NEXT:    s_flbit_i32_b32 s4, s5
-; SI-NEXT:    s_add_i32 s6, s2, 32
+; SI-NEXT:    s_add_i32 s2, s2, 32
+; SI-NEXT:    s_min_u32 s4, s2, s4
 ; SI-NEXT:    s_mov_b32 s2, -1
 ; SI-NEXT:    v_mov_b32_e32 v0, s4
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s5, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
 ; SI-NEXT:    buffer_store_dword v0, off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_ctlz_zero_undef_i64_trunc:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
 ; VI-NEXT:    v_mov_b32_e32 v0, s2
 ; VI-NEXT:    s_flbit_i32_b32 s0, s0
+; VI-NEXT:    s_flbit_i32_b32 s1, s1
 ; VI-NEXT:    s_add_i32 s0, s0, 32
-; VI-NEXT:    s_flbit_i32_b32 s4, s1
-; VI-NEXT:    s_cmp_eq_u32 s1, 0
-; VI-NEXT:    s_cselect_b32 s0, s0, s4
+; VI-NEXT:    s_min_u32 s0, s0, s1
 ; VI-NEXT:    v_mov_b32_e32 v1, s3
 ; VI-NEXT:    v_mov_b32_e32 v2, s0
 ; VI-NEXT:    flat_store_dword v[0:1], v2
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_ctlz_zero_undef_i64_trunc:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 6, @4, KC0[CB0:0-32], KC1[]

 ; SI-NEXT:    s_mov_b32 s6, 0
 ; SI-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_load_dwordx2 v[2:3], v[0:1], s[4:7], 0 addr64
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; SI-NEXT:    s_waitcnt vmcnt(0)
 ; SI-NEXT:    v_ffbh_u32_e32 v2, v2
-; SI-NEXT:    v_ffbh_u32_e32 v4, v3
 ; SI-NEXT:    v_add_i32_e32 v2, vcc, 32, v2
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v3
-; SI-NEXT:    v_cndmask_b32_e32 v2, v4, v2, vcc
+; SI-NEXT:    v_ffbh_u32_e32 v3, v3
+; SI-NEXT:    v_min_u32_e32 v2, v2, v3
 ; SI-NEXT:    v_mov_b32_e32 v3, v1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_store_dwordx2 v[2:3], v[0:1], s[4:7], 0 addr64
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_ctlz_zero_undef_i64:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_lshlrev_b32_e32 v3, 3, v0
-; VI-NEXT:    v_mov_b32_e32 v4, 0
 ; VI-NEXT:    v_mov_b32_e32 v2, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    v_mov_b32_e32 v5, s3
+; VI-NEXT:    v_mov_b32_e32 v4, s3
 ; VI-NEXT:    v_mov_b32_e32 v1, s1
 ; VI-NEXT:    v_add_u32_e32 v0, vcc, s0, v3
-; VI-NEXT:    v_addc_u32_e32 v1, vcc, v1, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v1, vcc, 0, v1, vcc
 ; VI-NEXT:    flat_load_dwordx2 v[0:1], v[0:1]
 ; VI-NEXT:    v_add_u32_e32 v3, vcc, s2, v3
-; VI-NEXT:    v_addc_u32_e32 v4, vcc, v5, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v4, vcc, 0, v4, vcc
 ; VI-NEXT:    s_waitcnt vmcnt(0)
 ; VI-NEXT:    v_ffbh_u32_e32 v0, v0
 ; VI-NEXT:    v_add_u32_e32 v0, vcc, 32, v0
-; VI-NEXT:    v_ffbh_u32_e32 v5, v1
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; VI-NEXT:    v_cndmask_b32_e32 v1, v5, v0, vcc
+; VI-NEXT:    v_ffbh_u32_e32 v1, v1
+; VI-NEXT:    v_min_u32_e32 v1, v0, v1
 ; VI-NEXT:    flat_store_dwordx2 v[3:4], v[1:2]
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_ctlz_zero_undef_i64:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 2, @8, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    TEX 0 @6
 ; EG-NEXT:    ALU 8, @11, KC0[CB0:0-32], KC1[]

 ; SI-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; SI-NEXT:    v_mov_b32_e32 v2, 0
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_load_dwordx2 v[3:4], v[1:2], s[4:7], 0 addr64
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; SI-NEXT:    v_lshlrev_b32_e32 v1, 2, v0
 ; SI-NEXT:    s_waitcnt vmcnt(0)
 ; SI-NEXT:    v_ffbh_u32_e32 v0, v3
-; SI-NEXT:    v_ffbh_u32_e32 v3, v4
 ; SI-NEXT:    v_add_i32_e32 v0, vcc, 32, v0
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v4
-; SI-NEXT:    v_cndmask_b32_e32 v0, v3, v0, vcc
+; SI-NEXT:    v_ffbh_u32_e32 v3, v4
+; SI-NEXT:    v_min_u32_e32 v0, v0, v3
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_store_dword v0, v[1:2], s[4:7], 0 addr64
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_ctlz_zero_undef_i64_trunc:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
-; VI-NEXT:    v_mov_b32_e32 v4, 0
 ; VI-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    v_mov_b32_e32 v5, s3
+; VI-NEXT:    v_mov_b32_e32 v4, s3
 ; VI-NEXT:    v_mov_b32_e32 v2, s1
 ; VI-NEXT:    v_add_u32_e32 v1, vcc, s0, v1
-; VI-NEXT:    v_addc_u32_e32 v2, vcc, v2, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v2, vcc, 0, v2, vcc
 ; VI-NEXT:    flat_load_dwordx2 v[1:2], v[1:2]
 ; VI-NEXT:    v_add_u32_e32 v3, vcc, s2, v0
-; VI-NEXT:    v_addc_u32_e32 v4, vcc, v5, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v4, vcc, 0, v4, vcc
 ; VI-NEXT:    s_waitcnt vmcnt(0)
 ; VI-NEXT:    v_ffbh_u32_e32 v0, v1
 ; VI-NEXT:    v_add_u32_e32 v0, vcc, 32, v0
 ; VI-NEXT:    v_ffbh_u32_e32 v1, v2
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v2
-; VI-NEXT:    v_cndmask_b32_e32 v0, v1, v0, vcc
+; VI-NEXT:    v_min_u32_e32 v0, v0, v1
 ; VI-NEXT:    flat_store_dword v[3:4], v0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_ctlz_zero_undef_i64_trunc:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 2, @8, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    TEX 0 @6
 ; EG-NEXT:    ALU 8, @11, KC0[CB0:0-32], KC1[]

llvm/test/CodeGen/AMDGPU/cttz.ll

 define amdgpu_kernel void @s_cttz_i64(i64 addrspace(1)* noalias %out, [8 x i32], i64 %val) nounwind {
 ; SI-LABEL: s_cttz_i64:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x13
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
 ; SI-NEXT:    s_mov_b32 s2, -1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
-; SI-NEXT:    s_ff1_i32_b32 s6, s5
-; SI-NEXT:    s_ff1_i32_b32 s7, s4
-; SI-NEXT:    s_add_i32 s6, s6, 32
-; SI-NEXT:    s_or_b32 s5, s5, s4
-; SI-NEXT:    v_mov_b32_e32 v0, s7
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s4, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
-; SI-NEXT:    v_cmp_ne_u32_e64 vcc, s5, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; SI-NEXT:    s_ff1_i32_b32 s5, s5
+; SI-NEXT:    s_min_u32 s5, s5, 0xffffffdf
+; SI-NEXT:    s_add_i32 s5, s5, 32
+; SI-NEXT:    s_ff1_i32_b32 s4, s4
+; SI-NEXT:    v_mov_b32_e32 v0, s5
+; SI-NEXT:    v_min3_u32 v0, s4, v0, 64
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
 ; SI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_cttz_i64:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x4c
 ; VI-NEXT:    s_mov_b32 s7, 0xf000
 ; VI-NEXT:    s_mov_b32 s6, -1
 ; VI-NEXT:    v_mov_b32_e32 v1, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    s_ff1_i32_b32 s2, s1
-; VI-NEXT:    s_add_i32 s2, s2, 32
-; VI-NEXT:    s_ff1_i32_b32 s3, s0
-; VI-NEXT:    s_cmp_eq_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s2, s2, s3
-; VI-NEXT:    s_or_b32 s0, s1, s0
-; VI-NEXT:    s_cmp_lg_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s0, s2, 64
-; VI-NEXT:    v_mov_b32_e32 v0, s0
+; VI-NEXT:    s_ff1_i32_b32 s1, s1
+; VI-NEXT:    v_add_u32_e64 v0, s[2:3], s1, 32 clamp
+; VI-NEXT:    s_ff1_i32_b32 s0, s0
+; VI-NEXT:    v_min3_u32 v0, s0, v0, 64
 ; VI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_cttz_i64:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 9, @4, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    MEM_RAT_CACHELESS STORE_RAW T0.XY, T1.X, 1
 ; EG-NEXT:    CF_END

 ; GFX10-LABEL: s_cttz_i64:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_clause 0x1
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x4c
 ; GFX10-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; GFX10-NEXT:    v_mov_b32_e32 v1, 0
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    s_ff1_i32_b32 s0, s3
-; GFX10-NEXT:    s_ff1_i32_b32 s1, s2
-; GFX10-NEXT:    s_add_i32 s0, s0, 32
-; GFX10-NEXT:    s_cmp_eq_u32 s2, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, s1
-; GFX10-NEXT:    s_or_b32 s1, s3, s2
-; GFX10-NEXT:    s_cmp_lg_u32 s1, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, 64
-; GFX10-NEXT:    v_mov_b32_e32 v0, s0
+; GFX10-NEXT:    v_add_nc_u32_e64 v0, s0, 32 clamp
+; GFX10-NEXT:    s_ff1_i32_b32 s0, s2
+; GFX10-NEXT:    v_min3_u32 v0, s0, v0, 64
 ; GFX10-NEXT:    global_store_dwordx2 v1, v[0:1], s[4:5]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: s_cttz_i64:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_clause 0x1
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x4c
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24

 define amdgpu_kernel void @s_cttz_i64_trunc(i32 addrspace(1)* noalias %out, i64 %val) nounwind {
 ; SI-LABEL: s_cttz_i64_trunc:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0xb
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
 ; SI-NEXT:    s_mov_b32 s2, -1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
-; SI-NEXT:    s_ff1_i32_b32 s6, s5
-; SI-NEXT:    s_ff1_i32_b32 s7, s4
-; SI-NEXT:    s_add_i32 s6, s6, 32
-; SI-NEXT:    s_or_b32 s5, s5, s4
-; SI-NEXT:    v_mov_b32_e32 v0, s7
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s4, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
-; SI-NEXT:    v_cmp_ne_u32_e64 vcc, s5, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; SI-NEXT:    s_ff1_i32_b32 s5, s5
+; SI-NEXT:    s_min_u32 s5, s5, 0xffffffdf
+; SI-NEXT:    s_add_i32 s5, s5, 32
+; SI-NEXT:    s_ff1_i32_b32 s4, s4
+; SI-NEXT:    v_mov_b32_e32 v0, s5
+; SI-NEXT:    v_min3_u32 v0, s4, v0, 64
 ; SI-NEXT:    buffer_store_dword v0, off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_cttz_i64_trunc:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    s_mov_b32 s7, 0xf000
 ; VI-NEXT:    s_mov_b32 s6, -1
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    s_ff1_i32_b32 s2, s1
-; VI-NEXT:    s_add_i32 s2, s2, 32
-; VI-NEXT:    s_ff1_i32_b32 s3, s0
-; VI-NEXT:    s_cmp_eq_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s2, s2, s3
-; VI-NEXT:    s_or_b32 s0, s1, s0
-; VI-NEXT:    s_cmp_lg_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s0, s2, 64
-; VI-NEXT:    v_mov_b32_e32 v0, s0
+; VI-NEXT:    s_ff1_i32_b32 s1, s1
+; VI-NEXT:    v_add_u32_e64 v0, s[2:3], s1, 32 clamp
+; VI-NEXT:    s_ff1_i32_b32 s0, s0
+; VI-NEXT:    v_min3_u32 v0, s0, v0, 64
 ; VI-NEXT:    buffer_store_dword v0, off, s[4:7], 0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_cttz_i64_trunc:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 8, @4, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    MEM_RAT_CACHELESS STORE_RAW T0.X, T1.X, 1
 ; EG-NEXT:    CF_END

 ; EG-NEXT:     LSHR * T1.X, KC0[2].Y, literal.x,
 ; EG-NEXT:    2(2.802597e-45), 0(0.000000e+00)
 ;
 ; GFX10-LABEL: s_cttz_i64_trunc:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_clause 0x1
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
-; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    v_mov_b32_e32 v1, 0
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    s_ff1_i32_b32 s0, s3
-; GFX10-NEXT:    s_ff1_i32_b32 s1, s2
-; GFX10-NEXT:    s_add_i32 s0, s0, 32
-; GFX10-NEXT:    s_cmp_eq_u32 s2, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, s1
-; GFX10-NEXT:    s_or_b32 s1, s3, s2
-; GFX10-NEXT:    s_cmp_lg_u32 s1, 0
-; GFX10-NEXT:    s_cselect_b32 s0, s0, 64
-; GFX10-NEXT:    v_mov_b32_e32 v1, s0
-; GFX10-NEXT:    global_store_dword v0, v1, s[4:5]
+; GFX10-NEXT:    v_add_nc_u32_e64 v0, s0, 32 clamp
+; GFX10-NEXT:    s_ff1_i32_b32 s0, s2
+; GFX10-NEXT:    v_min3_u32 v0, s0, v0, 64
+; GFX10-NEXT:    global_store_dword v1, v0, s[4:5]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: s_cttz_i64_trunc:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_clause 0x1
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x24
 ; GFX10-GISEL-NEXT:    v_mov_b32_e32 v1, 0

 ; SI-NEXT:    s_mov_b32 s7, 0xf000
 ; SI-NEXT:    s_mov_b32 s6, 0
 ; SI-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_load_dwordx2 v[2:3], v[0:1], s[4:7], 0 addr64
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; SI-NEXT:    s_waitcnt vmcnt(0)
-; SI-NEXT:    v_ffbl_b32_e32 v4, v3
-; SI-NEXT:    v_ffbl_b32_e32 v5, v2
-; SI-NEXT:    v_or_b32_e32 v3, v3, v2
-; SI-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v2
-; SI-NEXT:    v_cndmask_b32_e32 v2, v5, v4, vcc
-; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v3
-; SI-NEXT:    v_cndmask_b32_e32 v2, 64, v2, vcc
+; SI-NEXT:    v_ffbl_b32_e32 v3, v3
+; SI-NEXT:    v_min_u32_e32 v3, 0xffffffdf, v3
+; SI-NEXT:    v_add_i32_e32 v3, vcc, 32, v3
+; SI-NEXT:    v_ffbl_b32_e32 v2, v2
+; SI-NEXT:    v_min3_u32 v2, v2, v3, 64
 ; SI-NEXT:    v_mov_b32_e32 v3, v1
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_store_dwordx2 v[2:3], v[0:1], s[4:7], 0 addr64
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_cttz_i64:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_lshlrev_b32_e32 v3, 3, v0
-; VI-NEXT:    v_mov_b32_e32 v4, 0
 ; VI-NEXT:    v_mov_b32_e32 v2, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    v_mov_b32_e32 v5, s3
+; VI-NEXT:    v_mov_b32_e32 v4, s3
 ; VI-NEXT:    v_mov_b32_e32 v1, s1
 ; VI-NEXT:    v_add_u32_e32 v0, vcc, s0, v3
-; VI-NEXT:    v_addc_u32_e32 v1, vcc, v1, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v1, vcc, 0, v1, vcc
 ; VI-NEXT:    flat_load_dwordx2 v[0:1], v[0:1]
 ; VI-NEXT:    v_add_u32_e32 v3, vcc, s2, v3
-; VI-NEXT:    v_addc_u32_e32 v4, vcc, v5, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v4, vcc, 0, v4, vcc
 ; VI-NEXT:    s_waitcnt vmcnt(0)
-; VI-NEXT:    v_ffbl_b32_e32 v5, v1
-; VI-NEXT:    v_add_u32_e32 v5, vcc, 32, v5
-; VI-NEXT:    v_ffbl_b32_e32 v6, v0
-; VI-NEXT:    v_or_b32_e32 v1, v1, v0
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v0
-; VI-NEXT:    v_cndmask_b32_e32 v0, v6, v5, vcc
-; VI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v1
-; VI-NEXT:    v_cndmask_b32_e32 v1, 64, v0, vcc
+; VI-NEXT:    v_ffbl_b32_e32 v1, v1
+; VI-NEXT:    v_add_u32_e64 v1, s[0:1], v1, 32 clamp
+; VI-NEXT:    v_ffbl_b32_e32 v0, v0
+; VI-NEXT:    v_min3_u32 v1, v0, v1, 64
 ; VI-NEXT:    flat_store_dwordx2 v[3:4], v[1:2]
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_cttz_i64:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 2, @8, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    TEX 0 @6
 ; EG-NEXT:    ALU 10, @11, KC0[CB0:0-32], KC1[]

 ; GFX10-LABEL: v_cttz_i64:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-NEXT:    v_lshlrev_b32_e32 v2, 3, v0
 ; GFX10-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    global_load_dwordx2 v[0:1], v2, s[2:3]
 ; GFX10-NEXT:    s_waitcnt vmcnt(0)
-; GFX10-NEXT:    v_ffbl_b32_e32 v3, v1
-; GFX10-NEXT:    v_ffbl_b32_e32 v4, v0
-; GFX10-NEXT:    v_or_b32_e32 v1, v1, v0
-; GFX10-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v0
-; GFX10-NEXT:    v_add_nc_u32_e32 v3, 32, v3
-; GFX10-NEXT:    v_cndmask_b32_e32 v0, v4, v3, vcc_lo
-; GFX10-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v1
+; GFX10-NEXT:    v_ffbl_b32_e32 v1, v1
+; GFX10-NEXT:    v_ffbl_b32_e32 v0, v0
+; GFX10-NEXT:    v_add_nc_u32_e64 v1, v1, 32 clamp
+; GFX10-NEXT:    v_min3_u32 v0, v0, v1, 64
 ; GFX10-NEXT:    v_mov_b32_e32 v1, 0
-; GFX10-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc_lo
 ; GFX10-NEXT:    global_store_dwordx2 v2, v[0:1], s[0:1]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: v_cttz_i64:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-GISEL-NEXT:    v_lshlrev_b32_e32 v3, 3, v0
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24

 ; SI-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; SI-NEXT:    v_mov_b32_e32 v2, 0
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_load_dwordx2 v[3:4], v[1:2], s[4:7], 0 addr64
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; SI-NEXT:    v_lshlrev_b32_e32 v1, 2, v0
 ; SI-NEXT:    s_waitcnt vmcnt(0)
 ; SI-NEXT:    v_ffbl_b32_e32 v0, v4
-; SI-NEXT:    v_ffbl_b32_e32 v5, v3
-; SI-NEXT:    v_or_b32_e32 v4, v4, v3
+; SI-NEXT:    v_min_u32_e32 v0, 0xffffffdf, v0
 ; SI-NEXT:    v_add_i32_e32 v0, vcc, 32, v0
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v3
-; SI-NEXT:    v_cndmask_b32_e32 v0, v5, v0, vcc
-; SI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v4
-; SI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; SI-NEXT:    v_ffbl_b32_e32 v3, v3
+; SI-NEXT:    v_min3_u32 v0, v3, v0, 64
 ; SI-NEXT:    s_waitcnt lgkmcnt(0)
 ; SI-NEXT:    buffer_store_dword v0, v[1:2], s[4:7], 0 addr64
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_cttz_i64_trunc:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
-; VI-NEXT:    v_mov_b32_e32 v4, 0
 ; VI-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
-; VI-NEXT:    v_mov_b32_e32 v5, s3
+; VI-NEXT:    v_mov_b32_e32 v4, s3
 ; VI-NEXT:    v_mov_b32_e32 v2, s1
 ; VI-NEXT:    v_add_u32_e32 v1, vcc, s0, v1
-; VI-NEXT:    v_addc_u32_e32 v2, vcc, v2, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v2, vcc, 0, v2, vcc
 ; VI-NEXT:    flat_load_dwordx2 v[1:2], v[1:2]
 ; VI-NEXT:    v_add_u32_e32 v3, vcc, s2, v0
-; VI-NEXT:    v_addc_u32_e32 v4, vcc, v5, v4, vcc
+; VI-NEXT:    v_addc_u32_e32 v4, vcc, 0, v4, vcc
 ; VI-NEXT:    s_waitcnt vmcnt(0)
 ; VI-NEXT:    v_ffbl_b32_e32 v0, v2
-; VI-NEXT:    v_add_u32_e32 v0, vcc, 32, v0
-; VI-NEXT:    v_ffbl_b32_e32 v5, v1
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; VI-NEXT:    v_or_b32_e32 v2, v2, v1
-; VI-NEXT:    v_cndmask_b32_e32 v0, v5, v0, vcc
-; VI-NEXT:    v_cmp_ne_u32_e32 vcc, 0, v2
-; VI-NEXT:    v_cndmask_b32_e32 v0, 64, v0, vcc
+; VI-NEXT:    v_add_u32_e64 v0, s[0:1], v0, 32 clamp
+; VI-NEXT:    v_ffbl_b32_e32 v1, v1
+; VI-NEXT:    v_min3_u32 v0, v1, v0, 64
 ; VI-NEXT:    flat_store_dword v[3:4], v0
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_cttz_i64_trunc:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 2, @8, KC0[CB0:0-32], KC1[]
 ; EG-NEXT:    TEX 0 @6
 ; EG-NEXT:    ALU 10, @11, KC0[CB0:0-32], KC1[]

 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; GFX10-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24
 ; GFX10-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
 ; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX10-NEXT:    global_load_dwordx2 v[1:2], v1, s[2:3]
 ; GFX10-NEXT:    s_waitcnt vmcnt(0)
-; GFX10-NEXT:    v_ffbl_b32_e32 v3, v2
-; GFX10-NEXT:    v_ffbl_b32_e32 v4, v1
-; GFX10-NEXT:    v_or_b32_e32 v2, v2, v1
-; GFX10-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v1
-; GFX10-NEXT:    v_add_nc_u32_e32 v3, 32, v3
-; GFX10-NEXT:    v_cndmask_b32_e32 v1, v4, v3, vcc_lo
-; GFX10-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v2
-; GFX10-NEXT:    v_cndmask_b32_e32 v1, 64, v1, vcc_lo
+; GFX10-NEXT:    v_ffbl_b32_e32 v2, v2
+; GFX10-NEXT:    v_ffbl_b32_e32 v1, v1
+; GFX10-NEXT:    v_add_nc_u32_e64 v2, v2, 32 clamp
+; GFX10-NEXT:    v_min3_u32 v1, v1, v2, 64
 ; GFX10-NEXT:    global_store_dword v0, v1, s[0:1]
 ; GFX10-NEXT:    s_endpgm
 ;
 ; GFX10-GISEL-LABEL: v_cttz_i64_trunc:
 ; GFX10-GISEL:       ; %bb.0:
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
 ; GFX10-GISEL-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
 ; GFX10-GISEL-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24

llvm/test/CodeGen/AMDGPU/cttz_zero_undef.ll

 }
 
 define amdgpu_kernel void @s_cttz_zero_undef_i64_with_select(i64 addrspace(1)* noalias %out, i64 %val) nounwind {
 ; SI-LABEL: s_cttz_zero_undef_i64_with_select:
 ; SI:       ; %bb.0:
 ; SI-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0xb
 ; SI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x9
 ; SI-NEXT:    s_mov_b32 s3, 0xf000
-; SI-NEXT:    s_waitcnt lgkmcnt(0)
-; SI-NEXT:    s_ff1_i32_b32 s2, s5
-; SI-NEXT:    s_ff1_i32_b32 s5, s4
-; SI-NEXT:    s_add_i32 s6, s2, 32
 ; SI-NEXT:    s_mov_b32 s2, -1
-; SI-NEXT:    v_mov_b32_e32 v0, s5
-; SI-NEXT:    v_mov_b32_e32 v1, s6
-; SI-NEXT:    v_cmp_eq_u32_e64 vcc, s4, 0
-; SI-NEXT:    v_cndmask_b32_e32 v0, v0, v1, vcc
+; SI-NEXT:    s_waitcnt lgkmcnt(0)
+; SI-NEXT:    s_ff1_i32_b32 s5, s5
+; SI-NEXT:    s_ff1_i32_b32 s4, s4
+; SI-NEXT:    s_add_i32 s5, s5, 32
+; SI-NEXT:    s_min_u32 s4, s4, s5
 ; SI-NEXT:    v_mov_b32_e32 v1, 0
+; SI-NEXT:    v_mov_b32_e32 v0, s4
 ; SI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: s_cttz_zero_undef_i64_with_select:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24
 ; VI-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x2c
 ; VI-NEXT:    v_mov_b32_e32 v1, 0
 ; VI-NEXT:    s_waitcnt lgkmcnt(0)
 ; VI-NEXT:    v_mov_b32_e32 v2, s2
 ; VI-NEXT:    s_ff1_i32_b32 s1, s1
+; VI-NEXT:    s_ff1_i32_b32 s0, s0
 ; VI-NEXT:    s_add_i32 s1, s1, 32
-; VI-NEXT:    s_ff1_i32_b32 s4, s0
-; VI-NEXT:    s_cmp_eq_u32 s0, 0
-; VI-NEXT:    s_cselect_b32 s0, s1, s4
+; VI-NEXT:    s_min_u32 s0, s0, s1
 ; VI-NEXT:    v_mov_b32_e32 v0, s0
 ; VI-NEXT:    v_mov_b32_e32 v3, s3
 ; VI-NEXT:    flat_store_dwordx2 v[2:3], v[0:1]
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: s_cttz_zero_undef_i64_with_select:
 ; EG:       ; %bb.0:
 ; EG-NEXT:    ALU 7, @4, KC0[CB0:0-32], KC1[]

 ; SI-NEXT:    v_or_b32_e32 v2, v4, v3
 ; SI-NEXT:    v_lshlrev_b32_e32 v3, 16, v6
 ; SI-NEXT:    v_lshlrev_b32_e32 v2, 16, v2
 ; SI-NEXT:    v_or_b32_e32 v3, v3, v5
 ; SI-NEXT:    v_or_b32_e32 v2, v2, v0
 ; SI-NEXT:    v_ffbl_b32_e32 v0, v3
 ; SI-NEXT:    v_ffbl_b32_e32 v4, v2
 ; SI-NEXT:    v_add_i32_e32 v0, vcc, 32, v0
-; SI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v2
-; SI-NEXT:    v_cndmask_b32_e32 v0, v4, v0, vcc
+; SI-NEXT:    v_min_u32_e32 v0, v4, v0
 ; SI-NEXT:    v_cmp_ne_u64_e32 vcc, 0, v[2:3]
 ; SI-NEXT:    v_cndmask_b32_e32 v0, 32, v0, vcc
 ; SI-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; SI-NEXT:    s_endpgm
 ;
 ; VI-LABEL: v_cttz_zero_undef_i64_with_select:
 ; VI:       ; %bb.0:
 ; VI-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x24

 ; VI-NEXT:    v_add_u32_e32 v4, vcc, 32, v2
 ; VI-NEXT:    s_waitcnt vmcnt(1)
 ; VI-NEXT:    v_lshlrev_b32_e32 v2, 8, v7
 ; VI-NEXT:    v_or_b32_sdwa v0, v0, v6 dst_sel:WORD_1 dst_unused:UNUSED_PAD src0_sel:DWORD src1_sel:DWORD
 ; VI-NEXT:    s_waitcnt vmcnt(0)
 ; VI-NEXT:    v_or_b32_e32 v2, v2, v8
 ; VI-NEXT:    v_or_b32_e32 v2, v0, v2
 ; VI-NEXT:    v_ffbl_b32_e32 v0, v2
-; VI-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v2
-; VI-NEXT:    v_cndmask_b32_e32 v0, v0, v4, vcc
 ; VI-NEXT:    v_cmp_ne_u64_e32 vcc, 0, v[2:3]
+; VI-NEXT:    v_min_u32_e32 v0, v0, v4
 ; VI-NEXT:    v_mov_b32_e32 v2, s2
 ; VI-NEXT:    v_cndmask_b32_e32 v0, 32, v0, vcc
 ; VI-NEXT:    v_mov_b32_e32 v3, s3
 ; VI-NEXT:    flat_store_dwordx2 v[2:3], v[0:1]
 ; VI-NEXT:    s_endpgm
 ;
 ; EG-LABEL: v_cttz_zero_undef_i64_with_select:
 ; EG:       ; %bb.0:

llvm/test/CodeGen/AMDGPU/sdiv64.ll

 ; GCN-NEXT:    v_subrev_i32_e32 v0, vcc, s0, v0
 ; GCN-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_sdiv:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
-; GCN-IR-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0xd
+; GCN-IR-NEXT:    s_load_dwordx2 s[8:9], s[0:1], 0xd
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_ashr_i32 s2, s7, 31
+; GCN-IR-NEXT:    s_ashr_i32 s0, s7, 31
+; GCN-IR-NEXT:    s_mov_b32 s1, s0
+; GCN-IR-NEXT:    s_ashr_i32 s2, s9, 31
+; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[0:1], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s10, s6, s0
 ; GCN-IR-NEXT:    s_mov_b32 s3, s2
-; GCN-IR-NEXT:    s_ashr_i32 s8, s1, 31
-; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[2:3], s[6:7]
-; GCN-IR-NEXT:    s_sub_u32 s10, s6, s2
-; GCN-IR-NEXT:    s_mov_b32 s9, s8
-; GCN-IR-NEXT:    s_subb_u32 s11, s7, s2
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[8:9], s[0:1]
-; GCN-IR-NEXT:    s_sub_u32 s6, s0, s8
-; GCN-IR-NEXT:    s_flbit_i32_b32 s14, s6
-; GCN-IR-NEXT:    s_subb_u32 s7, s1, s8
-; GCN-IR-NEXT:    s_add_i32 s14, s14, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s15, s7
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s14
+; GCN-IR-NEXT:    s_subb_u32 s11, s7, s0
+; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[2:3], s[8:9]
+; GCN-IR-NEXT:    s_sub_u32 s6, s6, s2
+; GCN-IR-NEXT:    s_subb_u32 s7, s7, s2
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[6:7], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[14:15], s[10:11], 0
+; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[12:13], s[14:15]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s6
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s14, s10
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s15
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
+; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s13, s7
 ; GCN-IR-NEXT:    s_add_i32 s14, s14, 32
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s15, s11
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s15
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s14
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s11, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[14:15], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[10:11], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[12:13]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[12:13], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[12:13], s[12:13], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
-; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[10:11], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_min_u32 s12, s12, s13
+; GCN-IR-NEXT:    s_min_u32 s16, s14, s15
+; GCN-IR-NEXT:    s_sub_u32 s14, s12, s16
+; GCN-IR-NEXT:    s_subb_u32 s15, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[20:21], s[14:15], 63
+; GCN-IR-NEXT:    s_mov_b32 s13, 0
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[18:19], s[20:21]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[20:21], s[14:15], 63
+; GCN-IR-NEXT:    s_xor_b64 s[22:23], s[18:19], -1
+; GCN-IR-NEXT:    s_and_b64 s[20:21], s[22:23], s[20:21]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[20:21]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s18, s14, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s14
+; GCN-IR-NEXT:    s_addc_u32 s19, s15, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s15
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[18:19], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s14, 63, s14
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[10:11], s14
+; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[10:11], v4
+; GCN-IR-NEXT:    s_lshr_b64 s[18:19], s[10:11], s18
 ; GCN-IR-NEXT:    s_add_u32 s10, s6, -1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
 ; GCN-IR-NEXT:    s_addc_u32 s11, s7, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_not_b64 s[8:9], s[12:13]
+; GCN-IR-NEXT:    s_mov_b32 s17, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s8, s16
+; GCN-IR-NEXT:    s_addc_u32 s13, s9, s13
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], 0
+; GCN-IR-NEXT:    s_mov_b32 s9, 0
 ; GCN-IR-NEXT:  BB0_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s11
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s10, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s6, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s7, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s8, s15, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[18:19], s[18:19], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[18:19], s[8:9]
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[16:17], s[14:15]
+; GCN-IR-NEXT:    s_sub_u32 s8, s10, s18
+; GCN-IR-NEXT:    s_subb_u32 s8, s11, s19
+; GCN-IR-NEXT:    s_ashr_i32 s16, s8, 31
+; GCN-IR-NEXT:    s_mov_b32 s17, s16
+; GCN-IR-NEXT:    s_and_b32 s8, s16, 1
+; GCN-IR-NEXT:    s_and_b64 s[20:21], s[16:17], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s18, s18, s20
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s12
+; GCN-IR-NEXT:    s_subb_u32 s19, s19, s21
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s12, 1
+; GCN-IR-NEXT:    s_addc_u32 s13, s13, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], s[8:9]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_3
+; GCN-IR-NEXT:  BB0_4: ; %Flow6
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[6:7], s[8:9], s[6:7]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
 ; GCN-IR-NEXT:    s_branch BB0_6
-; GCN-IR-NEXT:  BB0_4:
+; GCN-IR-NEXT:  BB0_5:
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[18:19]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB0_7
-; GCN-IR-NEXT:  BB0_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB0_6: ; %Flow6
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB0_7: ; %udiv-end
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[8:9], s[2:3]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[18:19]
+; GCN-IR-NEXT:  BB0_6: ; %udiv-end
+; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[2:3], s[0:1]
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, s0, v0
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, s1, v1
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s1
 ; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s0, v0
 ; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0

 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v5, v3
 ; GCN-IR-NEXT:    v_subb_u32_e32 v3, vcc, v0, v5, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[2:3]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[9:10]
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v0, v2
 ; GCN-IR-NEXT:    s_or_b64 s[6:7], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, 32, v0
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v7, v3
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v3
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v13, v7, v0, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v13, v0, v7
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v0, v9
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, 32, v0
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v7, v10
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v10
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v14, v7, v0, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v14, v0, v7
 ; GCN-IR-NEXT:    v_sub_i32_e32 v7, vcc, v13, v14
 ; GCN-IR-NEXT:    v_subb_u32_e64 v8, s[4:5], 0, 0, vcc
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[7:8]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[4:5], 63, v[7:8]
 ; GCN-IR-NEXT:    s_or_b64 s[6:7], s[6:7], vcc
 ; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[6:7], -1
 ; GCN-IR-NEXT:    v_mov_b32_e32 v18, 0
 ; GCN-IR-NEXT:    v_mov_b32_e32 v6, v4

 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_load_dword s2, s[0:1], 0xb
 ; GCN-IR-NEXT:    s_load_dword s3, s[0:1], 0xc
 ; GCN-IR-NEXT:    s_load_dword s6, s[0:1], 0xd
 ; GCN-IR-NEXT:    s_load_dword s0, s[0:1], 0xe
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
 ; GCN-IR-NEXT:    s_sext_i32_i16 s3, s3
+; GCN-IR-NEXT:    s_ashr_i64 s[8:9], s[2:3], 24
 ; GCN-IR-NEXT:    s_sext_i32_i16 s7, s0
-; GCN-IR-NEXT:    s_ashr_i64 s[0:1], s[2:3], 24
-; GCN-IR-NEXT:    s_ashr_i32 s2, s3, 31
+; GCN-IR-NEXT:    s_ashr_i32 s0, s3, 31
+; GCN-IR-NEXT:    s_mov_b32 s1, s0
+; GCN-IR-NEXT:    s_ashr_i32 s2, s7, 31
+; GCN-IR-NEXT:    s_ashr_i64 s[12:13], s[6:7], 24
+; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[0:1], s[8:9]
+; GCN-IR-NEXT:    s_sub_u32 s10, s6, s0
 ; GCN-IR-NEXT:    s_mov_b32 s3, s2
-; GCN-IR-NEXT:    s_ashr_i64 s[8:9], s[6:7], 24
-; GCN-IR-NEXT:    s_ashr_i32 s6, s7, 31
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[2:3], s[0:1]
-; GCN-IR-NEXT:    s_sub_u32 s10, s0, s2
-; GCN-IR-NEXT:    s_mov_b32 s7, s6
-; GCN-IR-NEXT:    s_subb_u32 s11, s1, s2
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[6:7], s[8:9]
-; GCN-IR-NEXT:    s_sub_u32 s8, s0, s6
-; GCN-IR-NEXT:    s_flbit_i32_b32 s14, s8
-; GCN-IR-NEXT:    s_subb_u32 s9, s1, s6
-; GCN-IR-NEXT:    s_add_i32 s14, s14, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s15, s9
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s14
+; GCN-IR-NEXT:    s_subb_u32 s11, s7, s0
+; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[2:3], s[12:13]
+; GCN-IR-NEXT:    s_sub_u32 s6, s6, s2
+; GCN-IR-NEXT:    s_subb_u32 s7, s7, s2
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[6:7], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[14:15], s[10:11], 0
+; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[12:13], s[14:15]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s6
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s14, s10
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s15
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s9, 0
+; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s13, s7
 ; GCN-IR-NEXT:    s_add_i32 s14, s14, 32
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s15, s11
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s15
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s14
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s11, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[14:15], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[8:9], 0
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[10:11], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[12:13]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[12:13], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[12:13], s[12:13], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
-; GCN-IR-NEXT:    s_cbranch_vccz BB9_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[10:11], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_min_u32 s12, s12, s13
+; GCN-IR-NEXT:    s_min_u32 s16, s14, s15
+; GCN-IR-NEXT:    s_sub_u32 s14, s12, s16
+; GCN-IR-NEXT:    s_subb_u32 s15, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[20:21], s[14:15], 63
+; GCN-IR-NEXT:    s_mov_b32 s13, 0
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[18:19], s[20:21]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[20:21], s[14:15], 63
+; GCN-IR-NEXT:    s_xor_b64 s[22:23], s[18:19], -1
+; GCN-IR-NEXT:    s_and_b64 s[20:21], s[22:23], s[20:21]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[20:21]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB9_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s18, s14, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s14
+; GCN-IR-NEXT:    s_addc_u32 s19, s15, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s15
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[18:19], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s14, 63, s14
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[10:11], s14
+; GCN-IR-NEXT:    s_cbranch_vccz BB9_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[10:11], v4
-; GCN-IR-NEXT:    s_add_u32 s10, s8, -1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s11, s9, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[18:19], s[10:11], s18
+; GCN-IR-NEXT:    s_add_u32 s10, s6, -1
+; GCN-IR-NEXT:    s_addc_u32 s11, s7, -1
+; GCN-IR-NEXT:    s_not_b64 s[8:9], s[12:13]
+; GCN-IR-NEXT:    s_mov_b32 s17, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s8, s16
+; GCN-IR-NEXT:    s_addc_u32 s13, s9, s13
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], 0
+; GCN-IR-NEXT:    s_mov_b32 s9, 0
 ; GCN-IR-NEXT:  BB9_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s11
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s10, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s8, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s9, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s8, s15, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[18:19], s[18:19], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[18:19], s[8:9]
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[16:17], s[14:15]
+; GCN-IR-NEXT:    s_sub_u32 s8, s10, s18
+; GCN-IR-NEXT:    s_subb_u32 s8, s11, s19
+; GCN-IR-NEXT:    s_ashr_i32 s16, s8, 31
+; GCN-IR-NEXT:    s_mov_b32 s17, s16
+; GCN-IR-NEXT:    s_and_b32 s8, s16, 1
+; GCN-IR-NEXT:    s_and_b64 s[20:21], s[16:17], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s18, s18, s20
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s12
+; GCN-IR-NEXT:    s_subb_u32 s19, s19, s21
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s12, 1
+; GCN-IR-NEXT:    s_addc_u32 s13, s13, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], s[8:9]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB9_3
+; GCN-IR-NEXT:  BB9_4: ; %Flow3
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[6:7], s[8:9], s[6:7]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
 ; GCN-IR-NEXT:    s_branch BB9_6
-; GCN-IR-NEXT:  BB9_4:
+; GCN-IR-NEXT:  BB9_5:
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[18:19]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB9_7
-; GCN-IR-NEXT:  BB9_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB9_6: ; %Flow3
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB9_7: ; %udiv-end
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[6:7], s[2:3]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[18:19]
+; GCN-IR-NEXT:  BB9_6: ; %udiv-end
+; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[2:3], s[0:1]
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, s0, v0
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, s1, v1
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s1
 ; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s0, v0
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    buffer_store_short v1, off, s[4:7], 0 offset:4

 ; GCN-NEXT:    v_mov_b32_e32 v2, s2
 ; GCN-NEXT:    v_subrev_i32_e32 v0, vcc, s2, v0
 ; GCN-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_sdiv_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
-; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
+; GCN-IR-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_ashr_i32 s2, s7, 31
-; GCN-IR-NEXT:    s_mov_b32 s3, s2
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[2:3], s[6:7]
-; GCN-IR-NEXT:    s_sub_u32 s6, s0, s2
-; GCN-IR-NEXT:    s_subb_u32 s7, s1, s2
-; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s6
-; GCN-IR-NEXT:    s_add_i32 s8, s8, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s9, s7
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s9
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s8
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, 0xffffffc5, v2
-; GCN-IR-NEXT:    v_addc_u32_e64 v1, s[8:9], 0, -1, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[8:9], s[8:9], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[8:9]
-; GCN-IR-NEXT:    s_cbranch_vccz BB10_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v4, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[3:4], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], 24, v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_ashr_i32 s4, s3, 31
+; GCN-IR-NEXT:    s_mov_b32 s5, s4
+; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[4:5], s[2:3]
+; GCN-IR-NEXT:    s_sub_u32 s2, s2, s4
+; GCN-IR-NEXT:    s_subb_u32 s3, s3, s4
+; GCN-IR-NEXT:    s_flbit_i32_b32 s6, s2
+; GCN-IR-NEXT:    s_add_i32 s6, s6, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s7, s3
+; GCN-IR-NEXT:    s_min_u32 s10, s6, s7
+; GCN-IR-NEXT:    s_add_u32 s8, s10, 0xffffffc5
+; GCN-IR-NEXT:    s_addc_u32 s9, 0, -1
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[2:3], 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[14:15], s[8:9], 63
+; GCN-IR-NEXT:    s_mov_b64 s[6:7], 0
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[12:13], s[14:15]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[14:15], s[8:9], 63
+; GCN-IR-NEXT:    s_xor_b64 s[16:17], s[12:13], -1
+; GCN-IR-NEXT:    s_and_b64 s[14:15], s[16:17], s[14:15]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[14:15]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB10_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s14, s8, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_addc_u32 s15, s9, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[14:15], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s8, 63, s8
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], 24, s8
+; GCN-IR-NEXT:    s_cbranch_vccz BB10_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    s_add_u32 s8, s6, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], 24, v3
-; GCN-IR-NEXT:    v_sub_i32_e32 v4, vcc, 58, v2
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s9, s7, -1
-; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[0:1], 0, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[16:17], 24, s14
+; GCN-IR-NEXT:    s_add_u32 s8, s2, -1
+; GCN-IR-NEXT:    s_addc_u32 s9, s3, -1
+; GCN-IR-NEXT:    s_sub_u32 s10, 58, s10
+; GCN-IR-NEXT:    s_subb_u32 s11, 0, 0
+; GCN-IR-NEXT:    s_mov_b64 s[14:15], 0
+; GCN-IR-NEXT:    s_mov_b32 s7, 0
 ; GCN-IR-NEXT:  BB10_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s9
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s8, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s6, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s7, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s6, s13, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[16:17], s[16:17], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], s[12:13], 1
+; GCN-IR-NEXT:    s_or_b64 s[16:17], s[16:17], s[6:7]
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_sub_u32 s6, s8, s16
+; GCN-IR-NEXT:    s_subb_u32 s6, s9, s17
+; GCN-IR-NEXT:    s_ashr_i32 s14, s6, 31
+; GCN-IR-NEXT:    s_mov_b32 s15, s14
+; GCN-IR-NEXT:    s_and_b32 s6, s14, 1
+; GCN-IR-NEXT:    s_and_b64 s[18:19], s[14:15], s[2:3]
+; GCN-IR-NEXT:    s_sub_u32 s16, s16, s18
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_subb_u32 s17, s17, s19
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    s_add_u32 s10, s10, 1
+; GCN-IR-NEXT:    s_addc_u32 s11, s11, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[10:11], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[14:15], s[6:7]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB10_3
+; GCN-IR-NEXT:  BB10_4: ; %Flow5
+; GCN-IR-NEXT:    s_lshl_b64 s[2:3], s[12:13], 1
+; GCN-IR-NEXT:    s_or_b64 s[2:3], s[6:7], s[2:3]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
 ; GCN-IR-NEXT:    s_branch BB10_6
-; GCN-IR-NEXT:  BB10_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB10_7
 ; GCN-IR-NEXT:  BB10_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB10_6: ; %Flow5
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB10_7: ; %udiv-end
-; GCN-IR-NEXT:    v_xor_b32_e32 v0, s2, v0
-; GCN-IR-NEXT:    v_xor_b32_e32 v1, s3, v1
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s3
-; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s2, v0
-; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
-; GCN-IR-NEXT:    s_mov_b32 s6, -1
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[12:13]
+; GCN-IR-NEXT:  BB10_6: ; %udiv-end
+; GCN-IR-NEXT:    v_xor_b32_e32 v0, s4, v0
+; GCN-IR-NEXT:    v_xor_b32_e32 v1, s5, v1
+; GCN-IR-NEXT:    v_mov_b32_e32 v2, s5
+; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s4, v0
+; GCN-IR-NEXT:    s_mov_b32 s3, 0xf000
+; GCN-IR-NEXT:    s_mov_b32 s2, -1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
-; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
+; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = sdiv i64 24, %x
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
 define i64 @v_test_sdiv_k_num_i64(i64 %x) {
 ; GCN-LABEL: v_test_sdiv_k_num_i64:

 ;
 ; GCN-IR-LABEL: v_test_sdiv_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v2, 31, v1
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v2, v0
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v0, v2
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, v2, v1
-; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v0
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
+; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v5, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v10, v5, v4, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v10, v4, v5
 ; GCN-IR-NEXT:    s_movk_i32 s6, 0xffc5
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, s6, v10
 ; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[6:7], 0, -1, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[4:5]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v11, 0
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[4:5]

 ;
 ; GCN-IR-LABEL: v_test_sdiv_pow2_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v2, 31, v1
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v2, v0
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v0, v2
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, v2, v1
-; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v0
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
+; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v5, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v6, v5, v4, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v6, v4, v5
 ; GCN-IR-NEXT:    s_movk_i32 s6, 0xffd0
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, s6, v6
 ; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[6:7], 0, -1, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[4:5]
 ; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0x8000
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_mov_b32_e32 v8, s8

 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GCN-IR-LABEL: v_test_sdiv_pow2_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v2, 31, v1
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v2, v0
 ; GCN-IR-NEXT:    v_sub_i32_e32 v7, vcc, v0, v2
-; GCN-IR-NEXT:    v_ffbh_u32_e32 v0, v7
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, v2, v1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v8, vcc, v1, v2, vcc
+; GCN-IR-NEXT:    v_ffbh_u32_e32 v0, v7
 ; GCN-IR-NEXT:    v_add_i32_e64 v0, s[4:5], 32, v0
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v1, v8
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 s[4:5], 0, v8
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v1, v0, s[4:5]
+; GCN-IR-NEXT:    v_min_u32_e32 v0, v0, v1
 ; GCN-IR-NEXT:    v_sub_i32_e64 v3, s[4:5], 48, v0
 ; GCN-IR-NEXT:    v_subb_u32_e64 v4, s[4:5], 0, 0, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[7:8]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[4:5], 63, v[3:4]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v1, v2
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[3:4]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1

llvm/test/CodeGen/AMDGPU/srem64.ll

 ; GCN-NEXT:    v_cndmask_b32_e64 v2, v4, v3, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_srem:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
-; GCN-IR-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0xd
+; GCN-IR-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0xd
+; GCN-IR-NEXT:    s_mov_b64 s[2:3], 0
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[6:7], 0
-; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s2
-; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
-; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s6
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s3, 0
-; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[2:3], 0
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[10:11], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[8:9]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[8:9], s[8:9], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[8:9]
-; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[6:7], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[0:1], 0
+; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s0
+; GCN-IR-NEXT:    s_add_i32 s14, s12, 32
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[8:9], s[10:11]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s1
+; GCN-IR-NEXT:    s_min_u32 s10, s14, s8
+; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s6
+; GCN-IR-NEXT:    s_add_i32 s8, s8, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s9, s7
+; GCN-IR-NEXT:    s_min_u32 s14, s8, s9
+; GCN-IR-NEXT:    s_sub_u32 s8, s10, s14
+; GCN-IR-NEXT:    s_subb_u32 s9, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[16:17], s[8:9], 63
+; GCN-IR-NEXT:    s_mov_b32 s11, 0
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[12:13], s[16:17]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[16:17], s[8:9], 63
+; GCN-IR-NEXT:    s_xor_b64 s[18:19], s[12:13], -1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[18:19], s[16:17]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[16:17]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s16, s8, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_addc_u32 s17, s9, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[16:17], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s8, 63, s8
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], s[6:7], s8
+; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    s_add_u32 s8, s2, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v4
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s9, s3, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[16:17], s[6:7], s16
+; GCN-IR-NEXT:    s_add_u32 s8, s0, -1
+; GCN-IR-NEXT:    s_addc_u32 s9, s1, -1
+; GCN-IR-NEXT:    s_not_b64 s[2:3], s[10:11]
+; GCN-IR-NEXT:    s_mov_b32 s15, s11
+; GCN-IR-NEXT:    s_add_u32 s10, s2, s14
+; GCN-IR-NEXT:    s_addc_u32 s11, s3, s11
+; GCN-IR-NEXT:    s_mov_b64 s[14:15], 0
+; GCN-IR-NEXT:    s_mov_b32 s3, 0
 ; GCN-IR-NEXT:  BB0_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s9
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s8, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s2, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s3, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s2, s13, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[16:17], s[16:17], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], s[12:13], 1
+; GCN-IR-NEXT:    s_or_b64 s[16:17], s[16:17], s[2:3]
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_sub_u32 s2, s8, s16
+; GCN-IR-NEXT:    s_subb_u32 s2, s9, s17
+; GCN-IR-NEXT:    s_ashr_i32 s14, s2, 31
+; GCN-IR-NEXT:    s_mov_b32 s15, s14
+; GCN-IR-NEXT:    s_and_b32 s2, s14, 1
+; GCN-IR-NEXT:    s_and_b64 s[18:19], s[14:15], s[0:1]
+; GCN-IR-NEXT:    s_sub_u32 s16, s16, s18
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_subb_u32 s17, s17, s19
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    s_add_u32 s10, s10, 1
+; GCN-IR-NEXT:    s_addc_u32 s11, s11, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[10:11], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[14:15], s[2:3]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_3
+; GCN-IR-NEXT:  BB0_4: ; %Flow6
+; GCN-IR-NEXT:    s_lshl_b64 s[8:9], s[12:13], 1
+; GCN-IR-NEXT:    s_or_b64 s[2:3], s[2:3], s[8:9]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
 ; GCN-IR-NEXT:    s_branch BB0_6
-; GCN-IR-NEXT:  BB0_4:
+; GCN-IR-NEXT:  BB0_5:
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[12:13]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB0_7
-; GCN-IR-NEXT:  BB0_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB0_6: ; %Flow6
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB0_7: ; %udiv-end
-; GCN-IR-NEXT:    v_mul_lo_u32 v1, s2, v1
-; GCN-IR-NEXT:    v_mul_hi_u32 v2, s2, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v3, s3, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v0, s2, v0
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[12:13]
+; GCN-IR-NEXT:  BB0_6: ; %udiv-end
+; GCN-IR-NEXT:    v_mul_lo_u32 v1, s0, v1
+; GCN-IR-NEXT:    v_mul_hi_u32 v2, s0, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v3, s1, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v0, s0, v0
 ; GCN-IR-NEXT:    s_mov_b32 s11, 0xf000
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v1, v3
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s6, v0
 ; GCN-IR-NEXT:    s_mov_b32 s10, -1
 ; GCN-IR-NEXT:    s_mov_b32 s8, s4
 ; GCN-IR-NEXT:    s_mov_b32 s9, s5

 ; GCN-IR-NEXT:    v_xor_b32_e32 v3, v3, v6
 ; GCN-IR-NEXT:    v_subb_u32_e32 v6, vcc, v3, v6, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[5:6]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v5
 ; GCN-IR-NEXT:    s_or_b64 s[6:7], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 32, v3
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v7, v6
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v6
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v12, v7, v3, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v12, v3, v7
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 32, v3
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v7, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v14, v7, v3, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v14, v3, v7
 ; GCN-IR-NEXT:    v_sub_i32_e32 v7, vcc, v12, v14
 ; GCN-IR-NEXT:    v_subb_u32_e64 v8, s[4:5], 0, 0, vcc
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[7:8]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[4:5], 63, v[7:8]
 ; GCN-IR-NEXT:    s_or_b64 s[6:7], s[6:7], vcc
 ; GCN-IR-NEXT:    v_mov_b32_e32 v13, 0
 ; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[6:7], -1
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, v4

 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_srem33_64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0xd
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_ashr_i32 s2, s7, 31
-; GCN-IR-NEXT:    s_ashr_i64 s[10:11], s[0:1], 31
-; GCN-IR-NEXT:    s_ashr_i32 s0, s1, 31
+; GCN-IR-NEXT:    s_ashr_i64 s[2:3], s[6:7], 31
+; GCN-IR-NEXT:    s_ashr_i64 s[8:9], s[0:1], 31
+; GCN-IR-NEXT:    s_ashr_i32 s0, s7, 31
+; GCN-IR-NEXT:    s_ashr_i32 s6, s1, 31
 ; GCN-IR-NEXT:    s_mov_b32 s1, s0
-; GCN-IR-NEXT:    s_ashr_i64 s[8:9], s[6:7], 31
-; GCN-IR-NEXT:    s_mov_b32 s3, s2
-; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[8:9], s[2:3]
-; GCN-IR-NEXT:    s_xor_b64 s[10:11], s[10:11], s[0:1]
-; GCN-IR-NEXT:    s_sub_u32 s8, s6, s2
-; GCN-IR-NEXT:    s_subb_u32 s9, s7, s2
-; GCN-IR-NEXT:    s_sub_u32 s10, s10, s0
-; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s10
-; GCN-IR-NEXT:    s_subb_u32 s11, s11, s0
-; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s13, s11
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s12
-; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s8
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s13
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s11, 0
-; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s13, s9
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s13
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s12
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s9, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[12:13], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[10:11], 0
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[6:7], s[8:9], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[6:7]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[6:7], s[6:7], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[6:7]
-; GCN-IR-NEXT:    s_cbranch_vccz BB8_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[8:9], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_mov_b32 s7, s6
+; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[2:3], s[0:1]
+; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[8:9], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s2, s2, s0
+; GCN-IR-NEXT:    s_subb_u32 s3, s3, s0
+; GCN-IR-NEXT:    s_sub_u32 s8, s8, s6
+; GCN-IR-NEXT:    s_subb_u32 s9, s9, s6
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[8:9], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[2:3], 0
+; GCN-IR-NEXT:    s_mov_b64 s[6:7], 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[10:11], s[12:13]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s8
+; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s9
+; GCN-IR-NEXT:    s_min_u32 s12, s10, s11
+; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s2
+; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s3
+; GCN-IR-NEXT:    s_min_u32 s16, s10, s11
+; GCN-IR-NEXT:    s_sub_u32 s10, s12, s16
+; GCN-IR-NEXT:    s_subb_u32 s11, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[18:19], s[10:11], 63
+; GCN-IR-NEXT:    s_mov_b32 s13, 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[18:19]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[18:19], s[10:11], 63
+; GCN-IR-NEXT:    s_xor_b64 s[20:21], s[14:15], -1
+; GCN-IR-NEXT:    s_and_b64 s[18:19], s[20:21], s[18:19]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[18:19]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB8_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s18, s10, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_addc_u32 s19, s11, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[18:19], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s10, 63, s10
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[2:3], s10
+; GCN-IR-NEXT:    s_cbranch_vccz BB8_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    s_add_u32 s6, s10, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[8:9], v4
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s7, s11, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[18:19], s[2:3], s18
+; GCN-IR-NEXT:    s_add_u32 s10, s8, -1
+; GCN-IR-NEXT:    s_addc_u32 s11, s9, -1
+; GCN-IR-NEXT:    s_not_b64 s[6:7], s[12:13]
+; GCN-IR-NEXT:    s_mov_b32 s17, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s6, s16
+; GCN-IR-NEXT:    s_addc_u32 s13, s7, s13
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], 0
+; GCN-IR-NEXT:    s_mov_b32 s7, 0
 ; GCN-IR-NEXT:  BB8_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s6, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s10, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s11, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s6, s15, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[18:19], s[18:19], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[18:19], s[6:7]
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[16:17], s[14:15]
+; GCN-IR-NEXT:    s_sub_u32 s6, s10, s18
+; GCN-IR-NEXT:    s_subb_u32 s6, s11, s19
+; GCN-IR-NEXT:    s_ashr_i32 s16, s6, 31
+; GCN-IR-NEXT:    s_mov_b32 s17, s16
+; GCN-IR-NEXT:    s_and_b32 s6, s16, 1
+; GCN-IR-NEXT:    s_and_b64 s[20:21], s[16:17], s[8:9]
+; GCN-IR-NEXT:    s_sub_u32 s18, s18, s20
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s12
+; GCN-IR-NEXT:    s_subb_u32 s19, s19, s21
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s12, 1
+; GCN-IR-NEXT:    s_addc_u32 s13, s13, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], s[6:7]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB8_3
+; GCN-IR-NEXT:  BB8_4: ; %Flow6
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[6:7], s[6:7], s[10:11]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
 ; GCN-IR-NEXT:    s_branch BB8_6
-; GCN-IR-NEXT:  BB8_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s9
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB8_7
 ; GCN-IR-NEXT:  BB8_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB8_6: ; %Flow6
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB8_7: ; %udiv-end
-; GCN-IR-NEXT:    v_mul_lo_u32 v1, s10, v1
-; GCN-IR-NEXT:    v_mul_hi_u32 v2, s10, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v3, s11, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v0, s10, v0
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[14:15]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[14:15]
+; GCN-IR-NEXT:  BB8_6: ; %udiv-end
+; GCN-IR-NEXT:    v_mul_lo_u32 v1, s8, v1
+; GCN-IR-NEXT:    v_mul_hi_u32 v2, s8, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v3, s9, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v0, s8, v0
 ; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v1, v3
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s9
-; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v2, v1, vcc
-; GCN-IR-NEXT:    v_xor_b32_e32 v0, s2, v0
-; GCN-IR-NEXT:    v_xor_b32_e32 v1, s3, v1
+; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s2, v0
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s3
-; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s2, v0
+; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v2, v1, vcc
+; GCN-IR-NEXT:    v_xor_b32_e32 v0, s0, v0
+; GCN-IR-NEXT:    v_xor_b32_e32 v1, s1, v1
+; GCN-IR-NEXT:    v_mov_b32_e32 v2, s1
+; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s0, v0
 ; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-IR-NEXT:    s_endpgm
   %1 = ashr i64 %x, 31
   %2 = ashr i64 %y, 31
   %result = srem i64 %1, %2
   store i64 %result, i64 addrspace(1)* %out

 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx2 s[4:5], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_load_dword s2, s[0:1], 0xb
 ; GCN-IR-NEXT:    s_load_dword s3, s[0:1], 0xc
 ; GCN-IR-NEXT:    s_load_dword s6, s[0:1], 0xd
 ; GCN-IR-NEXT:    s_load_dword s0, s[0:1], 0xe
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
 ; GCN-IR-NEXT:    s_sext_i32_i16 s3, s3
+; GCN-IR-NEXT:    s_ashr_i64 s[8:9], s[2:3], 24
 ; GCN-IR-NEXT:    s_sext_i32_i16 s7, s0
-; GCN-IR-NEXT:    s_ashr_i64 s[0:1], s[2:3], 24
-; GCN-IR-NEXT:    s_ashr_i32 s2, s3, 31
-; GCN-IR-NEXT:    s_ashr_i32 s10, s7, 31
-; GCN-IR-NEXT:    s_mov_b32 s3, s2
-; GCN-IR-NEXT:    s_ashr_i64 s[8:9], s[6:7], 24
-; GCN-IR-NEXT:    s_mov_b32 s11, s10
-; GCN-IR-NEXT:    s_xor_b64 s[0:1], s[0:1], s[2:3]
-; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[8:9], s[10:11]
-; GCN-IR-NEXT:    s_sub_u32 s6, s0, s2
-; GCN-IR-NEXT:    s_subb_u32 s7, s1, s2
-; GCN-IR-NEXT:    s_sub_u32 s8, s8, s10
-; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s8
-; GCN-IR-NEXT:    s_subb_u32 s9, s9, s10
-; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s13, s9
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s12
-; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s6
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s13
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s9, 0
-; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s13, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s13
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s12
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[12:13], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[8:9], 0
+; GCN-IR-NEXT:    s_ashr_i32 s0, s3, 31
+; GCN-IR-NEXT:    s_ashr_i32 s12, s7, 31
+; GCN-IR-NEXT:    s_mov_b32 s1, s0
+; GCN-IR-NEXT:    s_ashr_i64 s[10:11], s[6:7], 24
+; GCN-IR-NEXT:    s_mov_b32 s13, s12
+; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[8:9], s[0:1]
+; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[10:11], s[12:13]
+; GCN-IR-NEXT:    s_sub_u32 s2, s2, s0
+; GCN-IR-NEXT:    s_subb_u32 s3, s3, s0
+; GCN-IR-NEXT:    s_sub_u32 s6, s6, s12
+; GCN-IR-NEXT:    s_subb_u32 s7, s7, s12
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[10:11]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[10:11], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[10:11], s[10:11], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[10:11]
-; GCN-IR-NEXT:    s_cbranch_vccz BB9_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[12:13], s[2:3], 0
+; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[10:11], s[12:13]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s6
+; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s7
+; GCN-IR-NEXT:    s_min_u32 s12, s10, s11
+; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s2
+; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s3
+; GCN-IR-NEXT:    s_min_u32 s16, s10, s11
+; GCN-IR-NEXT:    s_sub_u32 s10, s12, s16
+; GCN-IR-NEXT:    s_subb_u32 s11, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[18:19], s[10:11], 63
+; GCN-IR-NEXT:    s_mov_b32 s13, 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[18:19]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[18:19], s[10:11], 63
+; GCN-IR-NEXT:    s_xor_b64 s[20:21], s[14:15], -1
+; GCN-IR-NEXT:    s_and_b64 s[18:19], s[20:21], s[18:19]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[18:19]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB9_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s18, s10, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_addc_u32 s19, s11, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[18:19], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s10, 63, s10
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[2:3], s10
+; GCN-IR-NEXT:    s_cbranch_vccz BB9_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    s_add_u32 s10, s8, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v4
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s11, s9, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[18:19], s[2:3], s18
+; GCN-IR-NEXT:    s_add_u32 s10, s6, -1
+; GCN-IR-NEXT:    s_addc_u32 s11, s7, -1
+; GCN-IR-NEXT:    s_not_b64 s[8:9], s[12:13]
+; GCN-IR-NEXT:    s_mov_b32 s17, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s8, s16
+; GCN-IR-NEXT:    s_addc_u32 s13, s9, s13
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], 0
+; GCN-IR-NEXT:    s_mov_b32 s9, 0
 ; GCN-IR-NEXT:  BB9_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s11
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s10, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s8, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s9, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s8, s15, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[18:19], s[18:19], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[18:19], s[18:19], s[8:9]
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[16:17], s[14:15]
+; GCN-IR-NEXT:    s_sub_u32 s8, s10, s18
+; GCN-IR-NEXT:    s_subb_u32 s8, s11, s19
+; GCN-IR-NEXT:    s_ashr_i32 s16, s8, 31
+; GCN-IR-NEXT:    s_mov_b32 s17, s16
+; GCN-IR-NEXT:    s_and_b32 s8, s16, 1
+; GCN-IR-NEXT:    s_and_b64 s[20:21], s[16:17], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s18, s18, s20
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s12
+; GCN-IR-NEXT:    s_subb_u32 s19, s19, s21
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s13
+; GCN-IR-NEXT:    s_add_u32 s12, s12, 1
+; GCN-IR-NEXT:    s_addc_u32 s13, s13, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[16:17], s[8:9]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB9_3
+; GCN-IR-NEXT:  BB9_4: ; %Flow3
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[14:15], 1
+; GCN-IR-NEXT:    s_or_b64 s[8:9], s[8:9], s[10:11]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
 ; GCN-IR-NEXT:    s_branch BB9_6
-; GCN-IR-NEXT:  BB9_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB9_7
 ; GCN-IR-NEXT:  BB9_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB9_6: ; %Flow3
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB9_7: ; %udiv-end
-; GCN-IR-NEXT:    v_mul_lo_u32 v1, s8, v1
-; GCN-IR-NEXT:    v_mul_hi_u32 v2, s8, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v3, s9, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v0, s8, v0
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[14:15]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[14:15]
+; GCN-IR-NEXT:  BB9_6: ; %udiv-end
+; GCN-IR-NEXT:    v_mul_lo_u32 v1, s6, v1
+; GCN-IR-NEXT:    v_mul_hi_u32 v2, s6, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v3, s7, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v0, s6, v0
+; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v1, v3
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s6, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
-; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v2, v1, vcc
-; GCN-IR-NEXT:    v_xor_b32_e32 v0, s2, v0
-; GCN-IR-NEXT:    v_xor_b32_e32 v1, s3, v1
+; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s2, v0
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s3
-; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s2, v0
+; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v2, v1, vcc
+; GCN-IR-NEXT:    v_xor_b32_e32 v0, s0, v0
+; GCN-IR-NEXT:    v_xor_b32_e32 v1, s1, v1
+; GCN-IR-NEXT:    v_mov_b32_e32 v2, s1
+; GCN-IR-NEXT:    v_subrev_i32_e32 v0, vcc, s0, v0
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
-; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    buffer_store_short v1, off, s[4:7], 0 offset:4
 ; GCN-IR-NEXT:    buffer_store_dword v0, off, s[4:7], 0
 ; GCN-IR-NEXT:    s_endpgm
   %1 = ashr i48 %x, 24
   %2 = ashr i48 %y, 24
   %result = srem i48 %1, %2
   store i48 %result, i48 addrspace(1)* %out

 ; GCN-NEXT:    v_cndmask_b32_e32 v1, v1, v2, vcc
 ; GCN-NEXT:    v_cndmask_b32_e64 v2, v4, v3, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_srem_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
-; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
+; GCN-IR-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_ashr_i32 s0, s7, 31
-; GCN-IR-NEXT:    s_mov_b32 s1, s0
-; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[6:7], s[0:1]
-; GCN-IR-NEXT:    s_sub_u32 s2, s2, s0
-; GCN-IR-NEXT:    s_subb_u32 s3, s3, s0
-; GCN-IR-NEXT:    s_flbit_i32_b32 s6, s2
-; GCN-IR-NEXT:    s_add_i32 s6, s6, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s7, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s6
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s3, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, 0xffffffc5, v2
-; GCN-IR-NEXT:    v_addc_u32_e64 v1, s[6:7], 0, -1, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[2:3], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[6:7], s[6:7], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[6:7]
-; GCN-IR-NEXT:    s_cbranch_vccz BB10_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v4, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[3:4], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], 24, v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_ashr_i32 s6, s3, 31
+; GCN-IR-NEXT:    s_mov_b32 s7, s6
+; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[2:3], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s4, s2, s6
+; GCN-IR-NEXT:    s_subb_u32 s5, s3, s6
+; GCN-IR-NEXT:    s_flbit_i32_b32 s2, s4
+; GCN-IR-NEXT:    s_add_i32 s2, s2, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s3, s5
+; GCN-IR-NEXT:    s_min_u32 s8, s2, s3
+; GCN-IR-NEXT:    s_add_u32 s6, s8, 0xffffffc5
+; GCN-IR-NEXT:    s_addc_u32 s7, 0, -1
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[4:5], 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_mov_b64 s[2:3], 0
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[10:11], s[12:13]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_xor_b64 s[14:15], s[10:11], -1
+; GCN-IR-NEXT:    s_and_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB10_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s12, s6, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    s_addc_u32 s13, s7, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s6, 63, s6
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], 24, s6
+; GCN-IR-NEXT:    s_cbranch_vccz BB10_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    s_add_u32 s6, s2, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], 24, v3
-; GCN-IR-NEXT:    v_sub_i32_e32 v4, vcc, 58, v2
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s7, s3, -1
-; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[0:1], 0, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[14:15], 24, s12
+; GCN-IR-NEXT:    s_add_u32 s6, s4, -1
+; GCN-IR-NEXT:    s_addc_u32 s7, s5, -1
+; GCN-IR-NEXT:    s_sub_u32 s8, 58, s8
+; GCN-IR-NEXT:    s_subb_u32 s9, 0, 0
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], 0
+; GCN-IR-NEXT:    s_mov_b32 s3, 0
 ; GCN-IR-NEXT:  BB10_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s6, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s2, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s3, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s2, s11, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[2:3]
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[12:13], s[10:11]
+; GCN-IR-NEXT:    s_sub_u32 s2, s6, s14
+; GCN-IR-NEXT:    s_subb_u32 s2, s7, s15
+; GCN-IR-NEXT:    s_ashr_i32 s12, s2, 31
+; GCN-IR-NEXT:    s_mov_b32 s13, s12
+; GCN-IR-NEXT:    s_and_b32 s2, s12, 1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[12:13], s[4:5]
+; GCN-IR-NEXT:    s_sub_u32 s14, s14, s16
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_subb_u32 s15, s15, s17
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s8, 1
+; GCN-IR-NEXT:    s_addc_u32 s9, s9, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[8:9], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], s[2:3]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB10_3
+; GCN-IR-NEXT:  BB10_4: ; %Flow5
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[2:3], s[2:3], s[6:7]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
 ; GCN-IR-NEXT:    s_branch BB10_6
-; GCN-IR-NEXT:  BB10_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB10_7
 ; GCN-IR-NEXT:  BB10_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB10_6: ; %Flow5
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB10_7: ; %udiv-end
-; GCN-IR-NEXT:    v_mul_lo_u32 v1, s2, v1
-; GCN-IR-NEXT:    v_mul_hi_u32 v2, s2, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v3, s3, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v0, s2, v0
-; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[10:11]
+; GCN-IR-NEXT:  BB10_6: ; %udiv-end
+; GCN-IR-NEXT:    v_mul_lo_u32 v1, s4, v1
+; GCN-IR-NEXT:    v_mul_hi_u32 v2, s4, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v3, s5, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v0, s4, v0
+; GCN-IR-NEXT:    s_mov_b32 s3, 0xf000
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v1, v3
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 24, v0
-; GCN-IR-NEXT:    s_mov_b32 s6, -1
+; GCN-IR-NEXT:    s_mov_b32 s2, -1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
+; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = srem i64 24, %x
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
 define i64 @v_test_srem_k_num_i64(i64 %x) {
 ; GCN-LABEL: v_test_srem_k_num_i64:

 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v2, 31, v1
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v0, v2
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, v1, v2
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v0, v2
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v8, v3, v2, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v8, v2, v3
 ; GCN-IR-NEXT:    s_movk_i32 s6, 0xffc5
 ; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, s6, v8
 ; GCN-IR-NEXT:    v_addc_u32_e64 v4, s[6:7], 0, -1, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[3:4]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[3:4]

 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v2, 31, v1
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v0, v2
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, v1, v2
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v0, v2
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v4, v3, v2, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v4, v2, v3
 ; GCN-IR-NEXT:    s_movk_i32 s6, 0xffd0
 ; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, s6, v4
 ; GCN-IR-NEXT:    v_addc_u32_e64 v3, s[6:7], 0, -1, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[2:3]
 ; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0x8000
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_mov_b32_e32 v6, s8

 ;
 ; GCN-IR-LABEL: v_test_srem_pow2_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v2, 31, v1
 ; GCN-IR-NEXT:    v_xor_b32_e32 v0, v0, v2
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v0, v2
 ; GCN-IR-NEXT:    v_xor_b32_e32 v1, v1, v2
-; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v0
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v1, v2, vcc
+; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v0
 ; GCN-IR-NEXT:    v_add_i32_e64 v3, s[4:5], 32, v3
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 s[4:5], 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v8, v4, v3, s[4:5]
+; GCN-IR-NEXT:    v_min_u32_e32 v8, v3, v4
 ; GCN-IR-NEXT:    v_sub_i32_e64 v4, s[4:5], 48, v8
 ; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[4:5], 0, 0, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[4:5], 63, v[4:5]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v3, v2
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[4:5]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1

llvm/test/CodeGen/AMDGPU/udiv64.ll

 ; GCN-NEXT:    v_cndmask_b32_e32 v1, v1, v4, vcc
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_udiv_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
-; GCN-IR-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0xd
+; GCN-IR-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0xd
+; GCN-IR-NEXT:    s_mov_b64 s[2:3], 0
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[6:7], 0
-; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s2
-; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[6:7], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[0:1], 0
+; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[8:9], s[10:11]
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s6
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s3, 0
+; GCN-IR-NEXT:    s_add_i32 s12, s12, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s1
 ; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[2:3], 0
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[10:11], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[8:9]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[8:9], s[8:9], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[8:9]
-; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_min_u32 s8, s12, s8
+; GCN-IR-NEXT:    s_min_u32 s12, s10, s11
+; GCN-IR-NEXT:    s_sub_u32 s10, s8, s12
+; GCN-IR-NEXT:    s_subb_u32 s11, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[16:17], s[10:11], 63
+; GCN-IR-NEXT:    s_mov_b32 s9, 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[16:17]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[16:17], s[10:11], 63
+; GCN-IR-NEXT:    s_xor_b64 s[18:19], s[14:15], -1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[18:19], s[16:17]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[16:17]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s14, s10, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_addc_u32 s15, s11, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[14:15], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s10, 63, s10
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[6:7], s10
+; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v4
-; GCN-IR-NEXT:    s_add_u32 s6, s2, -1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s7, s3, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[14:15], s[6:7], s14
+; GCN-IR-NEXT:    s_add_u32 s6, s0, -1
+; GCN-IR-NEXT:    s_addc_u32 s7, s1, -1
+; GCN-IR-NEXT:    s_not_b64 s[2:3], s[8:9]
+; GCN-IR-NEXT:    s_mov_b32 s13, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s2, s12
+; GCN-IR-NEXT:    s_addc_u32 s9, s3, s9
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], 0
+; GCN-IR-NEXT:    s_mov_b32 s3, 0
 ; GCN-IR-NEXT:  BB0_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s6, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s2, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s3, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s2, s11, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[2:3]
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[12:13], s[10:11]
+; GCN-IR-NEXT:    s_sub_u32 s2, s6, s14
+; GCN-IR-NEXT:    s_subb_u32 s2, s7, s15
+; GCN-IR-NEXT:    s_ashr_i32 s12, s2, 31
+; GCN-IR-NEXT:    s_mov_b32 s13, s12
+; GCN-IR-NEXT:    s_and_b32 s2, s12, 1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[12:13], s[0:1]
+; GCN-IR-NEXT:    s_sub_u32 s14, s14, s16
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_subb_u32 s15, s15, s17
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s8, 1
+; GCN-IR-NEXT:    s_addc_u32 s9, s9, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[8:9], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], s[2:3]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_3
+; GCN-IR-NEXT:  BB0_4: ; %Flow6
+; GCN-IR-NEXT:    s_lshl_b64 s[0:1], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[0:1], s[2:3], s[0:1]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s1
 ; GCN-IR-NEXT:    s_branch BB0_6
-; GCN-IR-NEXT:  BB0_4:
+; GCN-IR-NEXT:  BB0_5:
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[14:15]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB0_7
-; GCN-IR-NEXT:  BB0_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB0_6: ; %Flow6
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB0_7: ; %udiv-end
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[14:15]
+; GCN-IR-NEXT:  BB0_6: ; %udiv-end
 ; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = udiv i64 %x, %y
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }

 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[2:3]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v2
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v5, v3
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v3
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v8, v5, v4, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v8, v4, v5
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v5, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v10, v5, v4, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v10, v4, v5
 ; GCN-IR-NEXT:    v_sub_i32_e32 v6, vcc, v8, v10
 ; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[6:7], 0, 0, vcc
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[6:7]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[6:7]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1
 ; GCN-IR-NEXT:    v_mov_b32_e32 v11, v9

 ; GCN-IR-NEXT:    s_load_dword s7, s[0:1], 0xe
 ; GCN-IR-NEXT:    s_mov_b32 s8, 0xffff
 ; GCN-IR-NEXT:    s_mov_b32 s9, 0xff000000
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
 ; GCN-IR-NEXT:    s_and_b32 s1, s3, s8
 ; GCN-IR-NEXT:    s_and_b32 s0, s2, s9
 ; GCN-IR-NEXT:    s_and_b32 s3, s7, s8
 ; GCN-IR-NEXT:    s_and_b32 s2, s6, s9
-; GCN-IR-NEXT:    s_lshr_b64 s[2:3], s[2:3], 24
-; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s2
 ; GCN-IR-NEXT:    s_lshr_b64 s[6:7], s[0:1], 24
-; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
+; GCN-IR-NEXT:    s_lshr_b64 s[2:3], s[2:3], 24
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[2:3], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[6:7], 0
+; GCN-IR-NEXT:    s_mov_b64 s[0:1], 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[8:9], s[10:11]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s2
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s6
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s3, 0
+; GCN-IR-NEXT:    s_add_i32 s8, s8, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s9, s3
 ; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
 ; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[10:11], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[2:3], 0
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[8:9]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[8:9], s[8:9], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[8:9]
-; GCN-IR-NEXT:    s_cbranch_vccz BB7_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_min_u32 s8, s8, s9
+; GCN-IR-NEXT:    s_min_u32 s12, s10, s11
+; GCN-IR-NEXT:    s_sub_u32 s10, s8, s12
+; GCN-IR-NEXT:    s_subb_u32 s11, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[16:17], s[10:11], 63
+; GCN-IR-NEXT:    s_mov_b32 s9, 0
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[16:17]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[16:17], s[10:11], 63
+; GCN-IR-NEXT:    s_xor_b64 s[18:19], s[14:15], -1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[18:19], s[16:17]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[16:17]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB7_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s14, s10, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_addc_u32 s15, s11, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[14:15], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s10, 63, s10
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[6:7], s10
+; GCN-IR-NEXT:    s_cbranch_vccz BB7_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v4
+; GCN-IR-NEXT:    s_lshr_b64 s[14:15], s[6:7], s14
 ; GCN-IR-NEXT:    s_add_u32 s6, s2, -1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
 ; GCN-IR-NEXT:    s_addc_u32 s7, s3, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_not_b64 s[0:1], s[8:9]
+; GCN-IR-NEXT:    s_mov_b32 s13, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s0, s12
+; GCN-IR-NEXT:    s_addc_u32 s9, s1, s9
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], 0
+; GCN-IR-NEXT:    s_mov_b32 s1, 0
 ; GCN-IR-NEXT:  BB7_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s6, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s2, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s3, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s0, s11, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[0:1]
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[12:13], s[10:11]
+; GCN-IR-NEXT:    s_sub_u32 s0, s6, s14
+; GCN-IR-NEXT:    s_subb_u32 s0, s7, s15
+; GCN-IR-NEXT:    s_ashr_i32 s12, s0, 31
+; GCN-IR-NEXT:    s_mov_b32 s13, s12
+; GCN-IR-NEXT:    s_and_b32 s0, s12, 1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[12:13], s[2:3]
+; GCN-IR-NEXT:    s_sub_u32 s14, s14, s16
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_subb_u32 s15, s15, s17
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s8, 1
+; GCN-IR-NEXT:    s_addc_u32 s9, s9, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[8:9], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], s[0:1]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB7_3
+; GCN-IR-NEXT:  BB7_4: ; %Flow3
+; GCN-IR-NEXT:    s_lshl_b64 s[2:3], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[2:3]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s1
 ; GCN-IR-NEXT:    s_branch BB7_6
-; GCN-IR-NEXT:  BB7_4:
+; GCN-IR-NEXT:  BB7_5:
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[14:15]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB7_7
-; GCN-IR-NEXT:  BB7_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB7_6: ; %Flow3
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB7_7: ; %udiv-end
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[14:15]
+; GCN-IR-NEXT:  BB7_6: ; %udiv-end
 ; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    buffer_store_short v1, off, s[4:7], 0 offset:4
 ; GCN-IR-NEXT:    buffer_store_dword v0, off, s[4:7], 0
 ; GCN-IR-NEXT:    s_endpgm
   %1 = lshr i48 %x, 24
   %2 = lshr i48 %y, 24
   %result = udiv i48 %1, %2

 ; GCN-NEXT:    v_cndmask_b32_e32 v1, 0, v2, vcc
 ; GCN-NEXT:    v_cndmask_b32_e64 v2, v7, v5, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[8:11], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_udiv_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
-; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
+; GCN-IR-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_flbit_i32_b32 s2, s6
-; GCN-IR-NEXT:    s_flbit_i32_b32 s3, s7
-; GCN-IR-NEXT:    s_add_i32 s2, s2, 32
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s2
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, 0xffffffc5, v2
-; GCN-IR-NEXT:    v_addc_u32_e64 v1, s[2:3], 0, -1, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[2:3], s[2:3], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[2:3]
-; GCN-IR-NEXT:    s_cbranch_vccz BB8_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v4, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[3:4], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], 24, v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s4, s2
+; GCN-IR-NEXT:    s_flbit_i32_b32 s5, s3
+; GCN-IR-NEXT:    s_add_i32 s4, s4, 32
+; GCN-IR-NEXT:    s_min_u32 s8, s4, s5
+; GCN-IR-NEXT:    s_add_u32 s6, s8, 0xffffffc5
+; GCN-IR-NEXT:    s_addc_u32 s7, 0, -1
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[2:3], 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_mov_b64 s[4:5], 0
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[10:11], s[12:13]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_xor_b64 s[14:15], s[10:11], -1
+; GCN-IR-NEXT:    s_and_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB8_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s12, s6, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    s_addc_u32 s13, s7, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s6, 63, s6
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], 24, s6
+; GCN-IR-NEXT:    s_cbranch_vccz BB8_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    s_add_u32 s2, s6, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], 24, v3
-; GCN-IR-NEXT:    v_sub_i32_e32 v4, vcc, 58, v2
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s3, s7, -1
-; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[0:1], 0, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[14:15], 24, s12
+; GCN-IR-NEXT:    s_add_u32 s6, s2, -1
+; GCN-IR-NEXT:    s_addc_u32 s7, s3, -1
+; GCN-IR-NEXT:    s_sub_u32 s8, 58, s8
+; GCN-IR-NEXT:    s_subb_u32 s9, 0, 0
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], 0
+; GCN-IR-NEXT:    s_mov_b32 s5, 0
 ; GCN-IR-NEXT:  BB8_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s3
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s2, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s6, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s7, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s4, s11, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[4:5]
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[12:13], s[10:11]
+; GCN-IR-NEXT:    s_sub_u32 s4, s6, s14
+; GCN-IR-NEXT:    s_subb_u32 s4, s7, s15
+; GCN-IR-NEXT:    s_ashr_i32 s12, s4, 31
+; GCN-IR-NEXT:    s_mov_b32 s13, s12
+; GCN-IR-NEXT:    s_and_b32 s4, s12, 1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[12:13], s[2:3]
+; GCN-IR-NEXT:    s_sub_u32 s14, s14, s16
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_subb_u32 s15, s15, s17
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s8, 1
+; GCN-IR-NEXT:    s_addc_u32 s9, s9, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[8:9], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], s[4:5]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB8_3
+; GCN-IR-NEXT:  BB8_4: ; %Flow5
+; GCN-IR-NEXT:    s_lshl_b64 s[2:3], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[2:3], s[4:5], s[2:3]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
 ; GCN-IR-NEXT:    s_branch BB8_6
-; GCN-IR-NEXT:  BB8_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB8_7
 ; GCN-IR-NEXT:  BB8_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB8_6: ; %Flow5
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB8_7: ; %udiv-end
-; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
-; GCN-IR-NEXT:    s_mov_b32 s6, -1
-; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[10:11]
+; GCN-IR-NEXT:  BB8_6: ; %udiv-end
+; GCN-IR-NEXT:    s_mov_b32 s3, 0xf000
+; GCN-IR-NEXT:    s_mov_b32 s2, -1
+; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = udiv i64 24, %x
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
 ; define i64 @v_test_udiv_k_num_i64(i64 %x) {
 ;   %result = udiv i64 24, %x

 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GCN-IR-LABEL: v_test_udiv_pow2_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v4, v3, v2, vcc
-; GCN-IR-NEXT:    v_add_i32_e32 v5, vcc, 0xffffffd0, v4
-; GCN-IR-NEXT:    v_addc_u32_e64 v6, s[6:7], 0, -1, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v4, v2, v3
+; GCN-IR-NEXT:    v_add_i32_e32 v6, vcc, 0xffffffd0, v4
+; GCN-IR-NEXT:    v_addc_u32_e64 v7, s[6:7], 0, -1, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[5:6]
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[6:7]
 ; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0x8000
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s8
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[5:6]
-; GCN-IR-NEXT:    v_mov_b32_e32 v7, 0
+; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[6:7]
+; GCN-IR-NEXT:    v_mov_b32_e32 v5, 0
 ; GCN-IR-NEXT:    v_cndmask_b32_e64 v2, v2, 0, s[4:5]
 ; GCN-IR-NEXT:    s_xor_b64 s[4:5], s[4:5], -1
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, v7
+; GCN-IR-NEXT:    v_mov_b32_e32 v3, v5
 ; GCN-IR-NEXT:    s_and_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    s_and_saveexec_b64 s[6:7], s[4:5]
 ; GCN-IR-NEXT:    s_cbranch_execz BB9_6
 ; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v5
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v6, vcc
-; GCN-IR-NEXT:    v_sub_i32_e64 v2, s[4:5], 63, v5
-; GCN-IR-NEXT:    v_cmp_ge_u64_e32 vcc, v[8:9], v[5:6]
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, 0
-; GCN-IR-NEXT:    v_lshl_b64 v[2:3], s[8:9], v2
+; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v6
+; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v7, vcc
+; GCN-IR-NEXT:    v_sub_i32_e64 v2, s[4:5], 63, v6
+; GCN-IR-NEXT:    v_cmp_ge_u64_e32 vcc, v[8:9], v[6:7]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v6, 0
+; GCN-IR-NEXT:    v_lshl_b64 v[2:3], s[8:9], v2
+; GCN-IR-NEXT:    v_mov_b32_e32 v7, 0
 ; GCN-IR-NEXT:    s_mov_b64 s[10:11], 0
 ; GCN-IR-NEXT:    s_and_saveexec_b64 s[4:5], vcc
 ; GCN-IR-NEXT:    s_xor_b64 s[8:9], exec, s[4:5]
 ; GCN-IR-NEXT:    s_cbranch_execz BB9_5
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
 ; GCN-IR-NEXT:    s_mov_b64 s[4:5], 0x8000
-; GCN-IR-NEXT:    v_lshr_b64 v[12:13], s[4:5], v8
+; GCN-IR-NEXT:    v_lshr_b64 v[10:11], s[4:5], v8
 ; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, -1, v0
 ; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, -1, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v10, vcc, 47, v4
-; GCN-IR-NEXT:    v_mov_b32_e32 v14, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v15, 0
-; GCN-IR-NEXT:    v_subb_u32_e32 v11, vcc, 0, v7, vcc
+; GCN-IR-NEXT:    v_sub_i32_e32 v4, vcc, 47, v4
+; GCN-IR-NEXT:    v_mov_b32_e32 v12, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v13, 0
+; GCN-IR-NEXT:    v_subb_u32_e32 v5, vcc, 0, v5, vcc
 ; GCN-IR-NEXT:  BB9_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[12:13], v[12:13], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v4, 31, v3
-; GCN-IR-NEXT:    v_or_b32_e32 v4, v12, v4
+; GCN-IR-NEXT:    v_lshl_b64 v[10:11], v[10:11], 1
+; GCN-IR-NEXT:    v_lshrrev_b32_e32 v6, 31, v3
+; GCN-IR-NEXT:    v_or_b32_e32 v10, v10, v6
 ; GCN-IR-NEXT:    v_lshl_b64 v[2:3], v[2:3], 1
-; GCN-IR-NEXT:    v_sub_i32_e32 v5, vcc, v8, v4
-; GCN-IR-NEXT:    v_subb_u32_e32 v5, vcc, v9, v13, vcc
-; GCN-IR-NEXT:    v_or_b32_e32 v2, v14, v2
-; GCN-IR-NEXT:    v_add_i32_e32 v14, vcc, 1, v10
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v7, 31, v5
-; GCN-IR-NEXT:    v_or_b32_e32 v3, v15, v3
-; GCN-IR-NEXT:    v_addc_u32_e32 v15, vcc, 0, v11, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[14:15], v[10:11]
-; GCN-IR-NEXT:    v_mov_b32_e32 v10, v14
-; GCN-IR-NEXT:    v_mov_b32_e32 v6, 0
-; GCN-IR-NEXT:    v_and_b32_e32 v5, 1, v7
-; GCN-IR-NEXT:    v_and_b32_e32 v16, v7, v1
-; GCN-IR-NEXT:    v_and_b32_e32 v7, v7, v0
-; GCN-IR-NEXT:    v_sub_i32_e64 v12, s[4:5], v4, v7
-; GCN-IR-NEXT:    v_mov_b32_e32 v11, v15
-; GCN-IR-NEXT:    v_mov_b32_e32 v15, v6
-; GCN-IR-NEXT:    v_subb_u32_e64 v13, s[4:5], v13, v16, s[4:5]
+; GCN-IR-NEXT:    v_sub_i32_e32 v6, vcc, v8, v10
+; GCN-IR-NEXT:    v_subb_u32_e32 v6, vcc, v9, v11, vcc
+; GCN-IR-NEXT:    v_or_b32_e32 v2, v12, v2
+; GCN-IR-NEXT:    v_ashrrev_i32_e32 v12, 31, v6
+; GCN-IR-NEXT:    v_and_b32_e32 v15, v12, v0
+; GCN-IR-NEXT:    v_and_b32_e32 v6, 1, v12
+; GCN-IR-NEXT:    v_and_b32_e32 v14, v12, v1
+; GCN-IR-NEXT:    v_add_i32_e32 v12, vcc, 1, v4
+; GCN-IR-NEXT:    v_or_b32_e32 v3, v13, v3
+; GCN-IR-NEXT:    v_addc_u32_e32 v13, vcc, 0, v5, vcc
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[12:13], v[4:5]
+; GCN-IR-NEXT:    v_mov_b32_e32 v4, v12
+; GCN-IR-NEXT:    v_mov_b32_e32 v7, 0
+; GCN-IR-NEXT:    v_sub_i32_e64 v10, s[4:5], v10, v15
+; GCN-IR-NEXT:    v_mov_b32_e32 v5, v13
+; GCN-IR-NEXT:    v_mov_b32_e32 v13, v7
+; GCN-IR-NEXT:    v_subb_u32_e64 v11, s[4:5], v11, v14, s[4:5]
 ; GCN-IR-NEXT:    s_or_b64 s[10:11], vcc, s[10:11]
-; GCN-IR-NEXT:    v_mov_b32_e32 v14, v5
+; GCN-IR-NEXT:    v_mov_b32_e32 v12, v6
 ; GCN-IR-NEXT:    s_andn2_b64 exec, exec, s[10:11]
 ; GCN-IR-NEXT:    s_cbranch_execnz BB9_3
 ; GCN-IR-NEXT:  ; %bb.4: ; %Flow
 ; GCN-IR-NEXT:    s_or_b64 exec, exec, s[10:11]
 ; GCN-IR-NEXT:  BB9_5: ; %Flow3
 ; GCN-IR-NEXT:    s_or_b64 exec, exec, s[8:9]
 ; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[2:3], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v3, v6, v1
-; GCN-IR-NEXT:    v_or_b32_e32 v2, v5, v0
+; GCN-IR-NEXT:    v_or_b32_e32 v3, v7, v1
+; GCN-IR-NEXT:    v_or_b32_e32 v2, v6, v0
 ; GCN-IR-NEXT:  BB9_6: ; %Flow4
 ; GCN-IR-NEXT:    s_or_b64 exec, exec, s[6:7]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, v2
 ; GCN-IR-NEXT:    v_mov_b32_e32 v1, v3
 ; GCN-IR-NEXT:    s_setpc_b64 s[30:31]
   %result = udiv i64 32768, %x
   ret i64 %result
 }
 
 define i64 @v_test_udiv_pow2_k_den_i64(i64 %x) {
 ; GCN-LABEL: v_test_udiv_pow2_k_den_i64:
 ; GCN:       ; %bb.0:
 ; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-NEXT:    v_alignbit_b32 v0, v1, v0, 15
 ; GCN-NEXT:    v_lshrrev_b32_e32 v1, 15, v1
 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GCN-IR-LABEL: v_test_udiv_pow2_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e64 v2, s[4:5], 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 s[4:5], 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v6, v3, v2, s[4:5]
+; GCN-IR-NEXT:    v_min_u32_e32 v6, v2, v3
 ; GCN-IR-NEXT:    v_sub_i32_e64 v4, s[4:5], 48, v6
 ; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[4:5], 0, 0, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[4:5], 63, v[4:5]
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[4:5]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1
 ; GCN-IR-NEXT:    v_cndmask_b32_e64 v2, v1, 0, s[4:5]

 ; GCN-NEXT:    v_cndmask_b32_e32 v2, v7, v5, vcc
 ; GCN-NEXT:    v_cndmask_b32_e64 v1, v1, v3, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, v2, s[0:1]
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_udiv_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
-; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
+; GCN-IR-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_flbit_i32_b32 s2, s6
-; GCN-IR-NEXT:    s_flbit_i32_b32 s3, s7
-; GCN-IR-NEXT:    s_add_i32 s2, s2, 32
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s2
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 59, v2
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[2:3], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[2:3], s[2:3], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[2:3]
-; GCN-IR-NEXT:    s_cbranch_vccz BB11_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v4, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[3:4], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s4, s2
+; GCN-IR-NEXT:    s_flbit_i32_b32 s5, s3
+; GCN-IR-NEXT:    s_add_i32 s4, s4, 32
+; GCN-IR-NEXT:    s_min_u32 s8, s4, s5
+; GCN-IR-NEXT:    s_sub_u32 s6, 59, s8
+; GCN-IR-NEXT:    s_subb_u32 s7, 0, 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[2:3], 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_mov_b64 s[4:5], 0
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[10:11], s[12:13]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_xor_b64 s[14:15], s[10:11], -1
+; GCN-IR-NEXT:    s_and_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB11_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s10, s6, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    s_addc_u32 s11, s7, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[10:11], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s6, 63, s6
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[2:3], s6
+; GCN-IR-NEXT:    s_cbranch_vccz BB11_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v3
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 0xffffffc4, v2
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], 0, -1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[10:11], s[2:3], s10
+; GCN-IR-NEXT:    s_add_u32 s2, s8, 0xffffffc4
+; GCN-IR-NEXT:    s_addc_u32 s3, 0, -1
+; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0
+; GCN-IR-NEXT:    s_mov_b32 s5, 0
 ; GCN-IR-NEXT:  BB11_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_sub_i32_e32 v2, vcc, 23, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, 0, v7, vcc
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, 24, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subbrev_u32_e64 v7, s[0:1], 0, v7, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s4, s7, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[10:11], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[6:7], 1
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[10:11], s[4:5]
+; GCN-IR-NEXT:    s_or_b64 s[6:7], s[8:9], s[6:7]
+; GCN-IR-NEXT:    s_sub_u32 s4, 23, s10
+; GCN-IR-NEXT:    s_subb_u32 s4, 0, s11
+; GCN-IR-NEXT:    s_ashr_i32 s8, s4, 31
+; GCN-IR-NEXT:    s_and_b32 s4, s8, 1
+; GCN-IR-NEXT:    s_and_b32 s8, s8, 24
+; GCN-IR-NEXT:    s_sub_u32 s10, s10, s8
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    s_subb_u32 s11, s11, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
+; GCN-IR-NEXT:    s_add_u32 s2, s2, 1
+; GCN-IR-NEXT:    s_addc_u32 s3, s3, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[2:3], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[8:9], s[4:5]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB11_3
+; GCN-IR-NEXT:  BB11_4: ; %Flow5
+; GCN-IR-NEXT:    s_lshl_b64 s[2:3], s[6:7], 1
+; GCN-IR-NEXT:    s_or_b64 s[2:3], s[4:5], s[2:3]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
 ; GCN-IR-NEXT:    s_branch BB11_6
-; GCN-IR-NEXT:  BB11_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB11_7
 ; GCN-IR-NEXT:  BB11_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB11_6: ; %Flow5
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB11_7: ; %udiv-end
-; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
-; GCN-IR-NEXT:    s_mov_b32 s6, -1
-; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[10:11]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[10:11]
+; GCN-IR-NEXT:  BB11_6: ; %udiv-end
+; GCN-IR-NEXT:    s_mov_b32 s3, 0xf000
+; GCN-IR-NEXT:    s_mov_b32 s2, -1
+; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = udiv i64 %x, 24
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
 define i64 @v_test_udiv_k_den_i64(i64 %x) {
 ; GCN-LABEL: v_test_udiv_k_den_i64:

 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GCN-IR-LABEL: v_test_udiv_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e64 v2, s[4:5], 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 s[4:5], 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v6, v3, v2, s[4:5]
+; GCN-IR-NEXT:    v_min_u32_e32 v6, v2, v3
 ; GCN-IR-NEXT:    v_sub_i32_e64 v4, s[4:5], 59, v6
 ; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[4:5], 0, 0, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[4:5], 63, v[4:5]
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[4:5]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1
 ; GCN-IR-NEXT:    v_cndmask_b32_e64 v2, v1, 0, s[4:5]

llvm/test/CodeGen/AMDGPU/urem64.ll

 ; GCN-NEXT:    v_cndmask_b32_e64 v2, v4, v3, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_urem_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
-; GCN-IR-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0xd
+; GCN-IR-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0xd
+; GCN-IR-NEXT:    s_mov_b64 s[2:3], 0
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[6:7], 0
-; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s2
-; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
-; GCN-IR-NEXT:    s_flbit_i32_b32 s10, s6
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s3, 0
-; GCN-IR-NEXT:    s_add_i32 s10, s10, 32
-; GCN-IR-NEXT:    s_flbit_i32_b32 s11, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s11
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s10
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v3, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, v2, v3
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[2:3], 0
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[10:11], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], s[8:9]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[8:9], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[8:9], s[8:9], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[8:9]
-; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v5, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[4:5], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[6:7], 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[8:9], s[0:1], 0
+; GCN-IR-NEXT:    s_flbit_i32_b32 s12, s0
+; GCN-IR-NEXT:    s_add_i32 s14, s12, 32
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[8:9], s[10:11]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s1
+; GCN-IR-NEXT:    s_min_u32 s10, s14, s8
+; GCN-IR-NEXT:    s_flbit_i32_b32 s8, s6
+; GCN-IR-NEXT:    s_add_i32 s8, s8, 32
+; GCN-IR-NEXT:    s_flbit_i32_b32 s9, s7
+; GCN-IR-NEXT:    s_min_u32 s14, s8, s9
+; GCN-IR-NEXT:    s_sub_u32 s8, s10, s14
+; GCN-IR-NEXT:    s_subb_u32 s9, 0, 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[16:17], s[8:9], 63
+; GCN-IR-NEXT:    s_mov_b32 s11, 0
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[12:13], s[16:17]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[16:17], s[8:9], 63
+; GCN-IR-NEXT:    s_xor_b64 s[18:19], s[12:13], -1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[18:19], s[16:17]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[16:17]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s16, s8, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_addc_u32 s17, s9, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[16:17], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s8, 63, s8
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], s[6:7], s8
+; GCN-IR-NEXT:    s_cbranch_vccz BB0_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_not_b32_e32 v2, v2
-; GCN-IR-NEXT:    s_add_u32 s8, s2, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v4
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, v2, v3
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s9, s3, -1
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], -1, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[16:17], s[6:7], s16
+; GCN-IR-NEXT:    s_add_u32 s8, s0, -1
+; GCN-IR-NEXT:    s_addc_u32 s9, s1, -1
+; GCN-IR-NEXT:    s_not_b64 s[2:3], s[10:11]
+; GCN-IR-NEXT:    s_mov_b32 s15, s11
+; GCN-IR-NEXT:    s_add_u32 s10, s2, s14
+; GCN-IR-NEXT:    s_addc_u32 s11, s3, s11
+; GCN-IR-NEXT:    s_mov_b64 s[14:15], 0
+; GCN-IR-NEXT:    s_mov_b32 s3, 0
 ; GCN-IR-NEXT:  BB0_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s9
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s8, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s2, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s3, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s2, s13, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[16:17], s[16:17], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], s[12:13], 1
+; GCN-IR-NEXT:    s_or_b64 s[16:17], s[16:17], s[2:3]
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_sub_u32 s2, s8, s16
+; GCN-IR-NEXT:    s_subb_u32 s2, s9, s17
+; GCN-IR-NEXT:    s_ashr_i32 s14, s2, 31
+; GCN-IR-NEXT:    s_mov_b32 s15, s14
+; GCN-IR-NEXT:    s_and_b32 s2, s14, 1
+; GCN-IR-NEXT:    s_and_b64 s[18:19], s[14:15], s[0:1]
+; GCN-IR-NEXT:    s_sub_u32 s16, s16, s18
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s10
+; GCN-IR-NEXT:    s_subb_u32 s17, s17, s19
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s11
+; GCN-IR-NEXT:    s_add_u32 s10, s10, 1
+; GCN-IR-NEXT:    s_addc_u32 s11, s11, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[10:11], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[14:15], s[2:3]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB0_3
+; GCN-IR-NEXT:  BB0_4: ; %Flow6
+; GCN-IR-NEXT:    s_lshl_b64 s[8:9], s[12:13], 1
+; GCN-IR-NEXT:    s_or_b64 s[2:3], s[2:3], s[8:9]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s3
 ; GCN-IR-NEXT:    s_branch BB0_6
-; GCN-IR-NEXT:  BB0_4:
+; GCN-IR-NEXT:  BB0_5:
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[12:13]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB0_7
-; GCN-IR-NEXT:  BB0_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB0_6: ; %Flow6
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB0_7: ; %udiv-end
-; GCN-IR-NEXT:    v_mul_lo_u32 v1, s2, v1
-; GCN-IR-NEXT:    v_mul_hi_u32 v2, s2, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v3, s3, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v0, s2, v0
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[12:13]
+; GCN-IR-NEXT:  BB0_6: ; %udiv-end
+; GCN-IR-NEXT:    v_mul_lo_u32 v1, s0, v1
+; GCN-IR-NEXT:    v_mul_hi_u32 v2, s0, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v3, s1, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v0, s0, v0
 ; GCN-IR-NEXT:    s_mov_b32 s11, 0xf000
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v1, v3
 ; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s6, v0
 ; GCN-IR-NEXT:    s_mov_b32 s10, -1
 ; GCN-IR-NEXT:    s_mov_b32 s8, s4
 ; GCN-IR-NEXT:    s_mov_b32 s9, s5

 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[2:3]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v2
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v5, v3
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v3
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v10, v5, v4, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v10, v4, v5
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v4, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 32, v4
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v5, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v12, v5, v4, vcc
+; GCN-IR-NEXT:    v_min_u32_e32 v12, v4, v5
 ; GCN-IR-NEXT:    v_sub_i32_e32 v5, vcc, v10, v12
 ; GCN-IR-NEXT:    v_subb_u32_e64 v6, s[6:7], 0, 0, vcc
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[5:6]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v11, 0
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[5:6]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1
 ; GCN-IR-NEXT:    v_mov_b32_e32 v13, v11

 ; GCN-NEXT:    v_cndmask_b32_e32 v1, v1, v2, vcc
 ; GCN-NEXT:    v_cndmask_b32_e64 v2, v4, v3, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[8:11], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_urem_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
-; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
+; GCN-IR-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_flbit_i32_b32 s2, s6
-; GCN-IR-NEXT:    s_flbit_i32_b32 s3, s7
-; GCN-IR-NEXT:    s_add_i32 s2, s2, 32
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s2
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, 0xffffffc5, v2
-; GCN-IR-NEXT:    v_addc_u32_e64 v1, s[2:3], 0, -1, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[2:3], s[2:3], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[2:3]
-; GCN-IR-NEXT:    s_cbranch_vccz BB6_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v4, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[3:4], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], 24, v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s4, s2
+; GCN-IR-NEXT:    s_flbit_i32_b32 s5, s3
+; GCN-IR-NEXT:    s_add_i32 s4, s4, 32
+; GCN-IR-NEXT:    s_min_u32 s8, s4, s5
+; GCN-IR-NEXT:    s_add_u32 s6, s8, 0xffffffc5
+; GCN-IR-NEXT:    s_addc_u32 s7, 0, -1
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[2:3], 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_mov_b64 s[4:5], 0
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[10:11], s[12:13]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[12:13], s[6:7], 63
+; GCN-IR-NEXT:    s_xor_b64 s[14:15], s[10:11], -1
+; GCN-IR-NEXT:    s_and_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB6_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s12, s6, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    s_addc_u32 s13, s7, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[12:13], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s6, 63, s6
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], 24, s6
+; GCN-IR-NEXT:    s_cbranch_vccz BB6_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    s_add_u32 s2, s6, -1
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], 24, v3
-; GCN-IR-NEXT:    v_sub_i32_e32 v4, vcc, 58, v2
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    s_addc_u32 s3, s7, -1
-; GCN-IR-NEXT:    v_subb_u32_e64 v5, s[0:1], 0, 0, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[14:15], 24, s12
+; GCN-IR-NEXT:    s_add_u32 s6, s2, -1
+; GCN-IR-NEXT:    s_addc_u32 s7, s3, -1
+; GCN-IR-NEXT:    s_sub_u32 s8, 58, s8
+; GCN-IR-NEXT:    s_subb_u32 s9, 0, 0
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], 0
+; GCN-IR-NEXT:    s_mov_b32 s5, 0
 ; GCN-IR-NEXT:  BB6_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s3
-; GCN-IR-NEXT:    v_sub_i32_e32 v8, vcc, s2, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, v2, v7, vcc
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, s6, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v11, s7, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subb_u32_e64 v7, s[0:1], v7, v11, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s4, s11, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[14:15], s[14:15], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[10:11], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[14:15], s[14:15], s[4:5]
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[12:13], s[10:11]
+; GCN-IR-NEXT:    s_sub_u32 s4, s6, s14
+; GCN-IR-NEXT:    s_subb_u32 s4, s7, s15
+; GCN-IR-NEXT:    s_ashr_i32 s12, s4, 31
+; GCN-IR-NEXT:    s_mov_b32 s13, s12
+; GCN-IR-NEXT:    s_and_b32 s4, s12, 1
+; GCN-IR-NEXT:    s_and_b64 s[16:17], s[12:13], s[2:3]
+; GCN-IR-NEXT:    s_sub_u32 s14, s14, s16
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_subb_u32 s15, s15, s17
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    s_add_u32 s8, s8, 1
+; GCN-IR-NEXT:    s_addc_u32 s9, s9, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[8:9], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[12:13], s[4:5]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB6_3
+; GCN-IR-NEXT:  BB6_4: ; %Flow5
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[10:11], 1
+; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], s[6:7]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s4
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s5
 ; GCN-IR-NEXT:    s_branch BB6_6
-; GCN-IR-NEXT:  BB6_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB6_7
 ; GCN-IR-NEXT:  BB6_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB6_6: ; %Flow5
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB6_7: ; %udiv-end
-; GCN-IR-NEXT:    v_mul_lo_u32 v1, s6, v1
-; GCN-IR-NEXT:    v_mul_hi_u32 v2, s6, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v3, s7, v0
-; GCN-IR-NEXT:    v_mul_lo_u32 v0, s6, v0
-; GCN-IR-NEXT:    s_mov_b32 s3, 0xf000
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, 0
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, 24, 0, s[10:11]
+; GCN-IR-NEXT:  BB6_6: ; %udiv-end
+; GCN-IR-NEXT:    v_mul_lo_u32 v1, s2, v1
+; GCN-IR-NEXT:    v_mul_hi_u32 v2, s2, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v3, s3, v0
+; GCN-IR-NEXT:    v_mul_lo_u32 v0, s2, v0
+; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v1, v3
 ; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 24, v0
-; GCN-IR-NEXT:    s_mov_b32 s2, -1
-; GCN-IR-NEXT:    s_mov_b32 s0, s4
-; GCN-IR-NEXT:    s_mov_b32 s1, s5
+; GCN-IR-NEXT:    s_mov_b32 s6, -1
+; GCN-IR-NEXT:    s_mov_b32 s4, s0
+; GCN-IR-NEXT:    s_mov_b32 s5, s1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
+; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = urem i64 24, %x
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
 define amdgpu_kernel void @s_test_urem_k_den_i64(i64 addrspace(1)* %out, i64 %x) {
 ; GCN-LABEL: s_test_urem_k_den_i64:

 ; GCN-NEXT:    v_cndmask_b32_e32 v2, v2, v4, vcc
 ; GCN-NEXT:    v_cndmask_b32_e64 v1, v1, v3, s[0:1]
 ; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, v2, s[0:1]
 ; GCN-NEXT:    buffer_store_dwordx2 v[0:1], off, s[8:11], 0
 ; GCN-NEXT:    s_endpgm
 ;
 ; GCN-IR-LABEL: s_test_urem_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
-; GCN-IR-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x9
+; GCN-IR-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x9
 ; GCN-IR-NEXT:    s_waitcnt lgkmcnt(0)
-; GCN-IR-NEXT:    s_flbit_i32_b32 s2, s6
-; GCN-IR-NEXT:    s_flbit_i32_b32 s3, s7
-; GCN-IR-NEXT:    s_add_i32 s2, s2, 32
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
-; GCN-IR-NEXT:    v_mov_b32_e32 v1, s2
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 vcc, s7, 0
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v2, v0, v1, vcc
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 59, v2
-; GCN-IR-NEXT:    v_subb_u32_e64 v1, s[2:3], 0, 0, vcc
-; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[0:1], s[6:7], 0
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_or_b64 s[0:1], s[0:1], vcc
-; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[0:1]
-; GCN-IR-NEXT:    s_xor_b64 s[2:3], s[0:1], -1
-; GCN-IR-NEXT:    s_and_b64 s[2:3], s[2:3], vcc
-; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[2:3]
-; GCN-IR-NEXT:    s_cbranch_vccz BB7_4
-; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
-; GCN-IR-NEXT:    v_add_i32_e32 v3, vcc, 1, v0
-; GCN-IR-NEXT:    v_addc_u32_e32 v4, vcc, 0, v1, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[0:1], v[3:4], v[0:1]
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, 63, v0
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], s[6:7], v0
-; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, s[0:1]
+; GCN-IR-NEXT:    s_flbit_i32_b32 s4, s2
+; GCN-IR-NEXT:    s_flbit_i32_b32 s5, s3
+; GCN-IR-NEXT:    s_add_i32 s4, s4, 32
+; GCN-IR-NEXT:    s_min_u32 s6, s4, s5
+; GCN-IR-NEXT:    s_sub_u32 s8, 59, s6
+; GCN-IR-NEXT:    s_subb_u32 s9, 0, 0
+; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[10:11], s[2:3], 0
+; GCN-IR-NEXT:    v_cmp_gt_u64_e64 s[12:13], s[8:9], 63
+; GCN-IR-NEXT:    s_mov_b64 s[4:5], 0
+; GCN-IR-NEXT:    s_or_b64 s[10:11], s[10:11], s[12:13]
+; GCN-IR-NEXT:    v_cmp_ne_u64_e64 s[12:13], s[8:9], 63
+; GCN-IR-NEXT:    s_xor_b64 s[14:15], s[10:11], -1
+; GCN-IR-NEXT:    s_and_b64 s[12:13], s[14:15], s[12:13]
+; GCN-IR-NEXT:    s_and_b64 vcc, exec, s[12:13]
 ; GCN-IR-NEXT:    s_cbranch_vccz BB7_5
+; GCN-IR-NEXT:  ; %bb.1: ; %udiv-bb1
+; GCN-IR-NEXT:    s_add_u32 s10, s8, 1
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s8
+; GCN-IR-NEXT:    s_addc_u32 s11, s9, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s9
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[10:11], v[0:1]
+; GCN-IR-NEXT:    s_sub_i32 s7, 63, s8
+; GCN-IR-NEXT:    s_andn2_b64 vcc, exec, vcc
+; GCN-IR-NEXT:    s_lshl_b64 s[8:9], s[2:3], s7
+; GCN-IR-NEXT:    s_cbranch_vccz BB7_4
 ; GCN-IR-NEXT:  ; %bb.2: ; %udiv-preheader
-; GCN-IR-NEXT:    v_lshr_b64 v[6:7], s[6:7], v3
-; GCN-IR-NEXT:    v_add_i32_e32 v4, vcc, 0xffffffc4, v2
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, 0
-; GCN-IR-NEXT:    v_addc_u32_e64 v5, s[0:1], 0, -1, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-IR-NEXT:    s_lshr_b64 s[12:13], s[2:3], s10
+; GCN-IR-NEXT:    s_add_u32 s6, s6, 0xffffffc4
+; GCN-IR-NEXT:    s_addc_u32 s7, 0, -1
+; GCN-IR-NEXT:    s_mov_b64 s[10:11], 0
+; GCN-IR-NEXT:    s_mov_b32 s5, 0
 ; GCN-IR-NEXT:  BB7_3: ; %udiv-do-while
 ; GCN-IR-NEXT:    ; =>This Inner Loop Header: Depth=1
-; GCN-IR-NEXT:    v_lshl_b64 v[6:7], v[6:7], 1
-; GCN-IR-NEXT:    v_lshrrev_b32_e32 v2, 31, v1
-; GCN-IR-NEXT:    v_or_b32_e32 v6, v6, v2
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_sub_i32_e32 v2, vcc, 23, v6
-; GCN-IR-NEXT:    v_subb_u32_e32 v2, vcc, 0, v7, vcc
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v8, v0
-; GCN-IR-NEXT:    v_ashrrev_i32_e32 v8, 31, v2
-; GCN-IR-NEXT:    v_and_b32_e32 v10, 24, v8
-; GCN-IR-NEXT:    v_and_b32_e32 v2, 1, v8
-; GCN-IR-NEXT:    v_add_i32_e32 v8, vcc, 1, v4
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v9, v1
-; GCN-IR-NEXT:    v_addc_u32_e32 v9, vcc, 0, v5, vcc
-; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, v[8:9], v[4:5]
-; GCN-IR-NEXT:    v_mov_b32_e32 v4, v8
-; GCN-IR-NEXT:    v_sub_i32_e64 v6, s[0:1], v6, v10
-; GCN-IR-NEXT:    v_mov_b32_e32 v5, v9
-; GCN-IR-NEXT:    v_mov_b32_e32 v9, v3
-; GCN-IR-NEXT:    v_subbrev_u32_e64 v7, s[0:1], 0, v7, s[0:1]
+; GCN-IR-NEXT:    s_lshr_b32 s4, s9, 31
+; GCN-IR-NEXT:    s_lshl_b64 s[12:13], s[12:13], 1
+; GCN-IR-NEXT:    s_lshl_b64 s[8:9], s[8:9], 1
+; GCN-IR-NEXT:    s_or_b64 s[12:13], s[12:13], s[4:5]
+; GCN-IR-NEXT:    s_or_b64 s[8:9], s[10:11], s[8:9]
+; GCN-IR-NEXT:    s_sub_u32 s4, 23, s12
+; GCN-IR-NEXT:    s_subb_u32 s4, 0, s13
+; GCN-IR-NEXT:    s_ashr_i32 s10, s4, 31
+; GCN-IR-NEXT:    s_and_b32 s4, s10, 1
+; GCN-IR-NEXT:    s_and_b32 s10, s10, 24
+; GCN-IR-NEXT:    s_sub_u32 s12, s12, s10
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
+; GCN-IR-NEXT:    s_subb_u32 s13, s13, 0
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s7
+; GCN-IR-NEXT:    s_add_u32 s6, s6, 1
+; GCN-IR-NEXT:    s_addc_u32 s7, s7, 0
+; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, s[6:7], v[0:1]
+; GCN-IR-NEXT:    s_mov_b64 s[10:11], s[4:5]
 ; GCN-IR-NEXT:    s_and_b64 vcc, exec, vcc
-; GCN-IR-NEXT:    v_mov_b32_e32 v8, v2
 ; GCN-IR-NEXT:    s_cbranch_vccz BB7_3
+; GCN-IR-NEXT:  BB7_4: ; %Flow5
+; GCN-IR-NEXT:    s_lshl_b64 s[6:7], s[8:9], 1
+; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], s[6:7]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s4
+; GCN-IR-NEXT:    v_mov_b32_e32 v1, s5
 ; GCN-IR-NEXT:    s_branch BB7_6
-; GCN-IR-NEXT:  BB7_4:
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s7
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[0:1]
-; GCN-IR-NEXT:    v_mov_b32_e32 v0, s6
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[0:1]
-; GCN-IR-NEXT:    s_branch BB7_7
 ; GCN-IR-NEXT:  BB7_5:
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, 0
-; GCN-IR-NEXT:    v_mov_b32_e32 v3, 0
-; GCN-IR-NEXT:  BB7_6: ; %Flow5
-; GCN-IR-NEXT:    v_lshl_b64 v[0:1], v[0:1], 1
-; GCN-IR-NEXT:    v_or_b32_e32 v0, v2, v0
-; GCN-IR-NEXT:    v_or_b32_e32 v1, v3, v1
-; GCN-IR-NEXT:  BB7_7: ; %udiv-end
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s3
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v1, v0, 0, s[10:11]
+; GCN-IR-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-IR-NEXT:    v_cndmask_b32_e64 v0, v0, 0, s[10:11]
+; GCN-IR-NEXT:  BB7_6: ; %udiv-end
 ; GCN-IR-NEXT:    v_mul_hi_u32 v2, v0, 24
 ; GCN-IR-NEXT:    v_mul_lo_u32 v1, v1, 24
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, 24
-; GCN-IR-NEXT:    s_mov_b32 s3, 0xf000
-; GCN-IR-NEXT:    s_mov_b32 s2, -1
+; GCN-IR-NEXT:    s_mov_b32 s7, 0xf000
+; GCN-IR-NEXT:    s_mov_b32 s6, -1
 ; GCN-IR-NEXT:    v_add_i32_e32 v1, vcc, v2, v1
-; GCN-IR-NEXT:    v_mov_b32_e32 v2, s7
-; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s6, v0
-; GCN-IR-NEXT:    s_mov_b32 s0, s4
-; GCN-IR-NEXT:    s_mov_b32 s1, s5
+; GCN-IR-NEXT:    v_mov_b32_e32 v2, s3
+; GCN-IR-NEXT:    v_sub_i32_e32 v0, vcc, s2, v0
+; GCN-IR-NEXT:    s_mov_b32 s4, s0
+; GCN-IR-NEXT:    s_mov_b32 s5, s1
 ; GCN-IR-NEXT:    v_subb_u32_e32 v1, vcc, v2, v1, vcc
-; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[0:3], 0
+; GCN-IR-NEXT:    buffer_store_dwordx2 v[0:1], off, s[4:7], 0
 ; GCN-IR-NEXT:    s_endpgm
   %result = urem i64 %x, 24
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
 ; FIXME: Constant bus violation
 ; define i64 @v_test_urem_k_num_i64(i64 %x) {

 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GCN-IR-LABEL: v_test_urem_pow2_k_num_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e32 v4, v3, v2, vcc
-; GCN-IR-NEXT:    s_movk_i32 s6, 0xffd0
-; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, s6, v4
+; GCN-IR-NEXT:    v_min_u32_e32 v4, v2, v3
+; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, 0xffffffd0, v4
 ; GCN-IR-NEXT:    v_addc_u32_e64 v3, s[6:7], 0, -1, vcc
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e64 s[4:5], 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e32 vcc, 63, v[2:3]
 ; GCN-IR-NEXT:    s_mov_b64 s[8:9], 0x8000
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], s[4:5], vcc
 ; GCN-IR-NEXT:    v_mov_b32_e32 v6, s8
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[2:3]
 ; GCN-IR-NEXT:    v_mov_b32_e32 v5, 0

 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GCN-IR-LABEL: v_test_urem_pow2_k_den_i64:
 ; GCN-IR:       ; %bb.0: ; %_udiv-special-cases
 ; GCN-IR-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v2, v0
 ; GCN-IR-NEXT:    v_add_i32_e64 v2, s[4:5], 32, v2
 ; GCN-IR-NEXT:    v_ffbh_u32_e32 v3, v1
-; GCN-IR-NEXT:    v_cmp_eq_u32_e64 s[4:5], 0, v1
-; GCN-IR-NEXT:    v_cndmask_b32_e64 v6, v3, v2, s[4:5]
+; GCN-IR-NEXT:    v_min_u32_e32 v6, v2, v3
 ; GCN-IR-NEXT:    v_sub_i32_e64 v2, s[4:5], 48, v6
 ; GCN-IR-NEXT:    v_subb_u32_e64 v3, s[4:5], 0, 0, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_eq_u64_e32 vcc, 0, v[0:1]
 ; GCN-IR-NEXT:    v_cmp_lt_u64_e64 s[4:5], 63, v[2:3]
 ; GCN-IR-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
 ; GCN-IR-NEXT:    v_cmp_ne_u64_e32 vcc, 63, v[2:3]
 ; GCN-IR-NEXT:    s_xor_b64 s[6:7], s[4:5], -1
 ; GCN-IR-NEXT:    v_cndmask_b32_e64 v5, v1, 0, s[4:5]