[AMDGPU] Process any power of 2 in optimizeCompareInstr

[rampitec]

Rebased.

[arsenm]

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

8028

1 << n instead of 2^n?

[rampitec]

• Updated comment
• Fixed tidy comment

[foad]

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

8038

Yeah that is an ugly special case. Do we really need to handle ge/gt here at all? Can't we rely on something else canonicalizing them all to eq/ne comparisons?

8121

Isn't this just BitNo?

[rampitec]

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

8038

It must be even uglier since llvm tends to change "a >= i" to "a > i - 1". So in practice it is canonicacalized to be not a power of 2 often. That is really so much interlinked...

In addition it tends to kill any known power of 2 by replacing it with a shift and comparing a low bit. I feel somewhat lost trying to deoptimize.

8121

Yes, silly. Too much changes and copy-paste.

[rampitec]

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

8121

https://reviews.llvm.org/rGd0c064715c6c

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

if (!SrcReg || SrcReg.isPhysical())
     return false;
 
   if (SrcReg2 && !getFoldableImm(SrcReg2, *MRI, CmpValue))
     return false;
 
   const auto optimizeCmpAnd = [&CmpInstr, SrcReg, CmpValue, MRI,
                                this](int64_t ExpectedValue,
                                      unsigned SrcSize,
-                                     bool IsReversable) -> bool {
-    // s_cmp_eq_u32 (s_and_b32 $src, 1), 1 => s_and_b32 $src, 1
-    // s_cmp_eq_i32 (s_and_b32 $src, 1), 1 => s_and_b32 $src, 1
-    // s_cmp_ge_u32 (s_and_b32 $src, 1), 1 => s_and_b32 $src, 1
-    // s_cmp_ge_i32 (s_and_b32 $src, 1), 1 => s_and_b32 $src, 1
-    // s_cmp_eq_u64 (s_and_b64 $src, 1), 1 => s_and_b64 $src, 1
-    // s_cmp_lg_u32 (s_and_b32 $src, 1), 0 => s_and_b32 $src, 1
-    // s_cmp_lg_i32 (s_and_b32 $src, 1), 0 => s_and_b32 $src, 1
-    // s_cmp_gt_u32 (s_and_b32 $src, 1), 0 => s_and_b32 $src, 1
-    // s_cmp_gt_i32 (s_and_b32 $src, 1), 0 => s_and_b32 $src, 1
-    // s_cmp_lg_u64 (s_and_b64 $src, 1), 0 => s_and_b64 $src, 1
+                                     bool IsReversable,
+                                     bool IsSigned) -> bool {
+    // s_cmp_eq_u32 (s_and_b32 $src, 2^n), 2^n => s_and_b32 $src, 2^n
+    // s_cmp_eq_i32 (s_and_b32 $src, 2^n), 2^n => s_and_b32 $src, 2^n
+    // s_cmp_ge_u32 (s_and_b32 $src, 2^n), 2^n => s_and_b32 $src, 2^n
+    // s_cmp_ge_i32 (s_and_b32 $src, 2^n), 2^n => s_and_b32 $src, 2^n
+    // s_cmp_eq_u64 (s_and_b64 $src, 2^n), 2^n => s_and_b64 $src, 2^n
+    // s_cmp_lg_u32 (s_and_b32 $src, 2^n), 0 => s_and_b32 $src, 2^n
+    // s_cmp_lg_i32 (s_and_b32 $src, 2^n), 0 => s_and_b32 $src, 2^n
+    // s_cmp_gt_u32 (s_and_b32 $src, 2^n), 0 => s_and_b32 $src, 2^n
+    // s_cmp_gt_i32 (s_and_b32 $src, 2^n), 0 => s_and_b32 $src, 2^n
+    // s_cmp_lg_u64 (s_and_b64 $src, 2^n), 0 => s_and_b64 $src, 2^n
+    //
+    // Signed ge/gt are not used for the sign bit.
     //
     // If result of the AND is unused except in the compare:
-    // s_and_b(32|64) $src, 1 => s_bitcmp1_b(32|64) $src, 0
+    // s_and_b(32|64) $src, 2^n => s_bitcmp1_b(32|64) $src, n
     //
-    // s_cmp_eq_u32 (s_and_b32 $src, 1), 0 => s_bitcmp0_b32 $src, 0
-    // s_cmp_eq_i32 (s_and_b32 $src, 1), 0 => s_bitcmp0_b32 $src, 0
-    // s_cmp_eq_u64 (s_and_b64 $src, 1), 0 => s_bitcmp0_b64 $src, 0
-    // s_cmp_lg_u32 (s_and_b32 $src, 1), 1 => s_bitcmp0_b32 $src, 0
-    // s_cmp_lg_i32 (s_and_b32 $src, 1), 1 => s_bitcmp0_b32 $src, 0
-    // s_cmp_lg_u64 (s_and_b64 $src, 1), 1 => s_bitcmp0_b64 $src, 0
-
-    bool IsReversedCC = false;
-    if (CmpValue != ExpectedValue) {
-      if (!IsReversable)
-        return false;
-      IsReversedCC = CmpValue == (ExpectedValue ^ 1);
-      if (!IsReversedCC)
-        return false;
-    }
+    // s_cmp_eq_u32 (s_and_b32 $src, 2^n), 0 => s_bitcmp0_b32 $src, n
+    // s_cmp_eq_i32 (s_and_b32 $src, 2^n), 0 => s_bitcmp0_b32 $src, n
+    // s_cmp_eq_u64 (s_and_b64 $src, 2^n), 0 => s_bitcmp0_b64 $src, n
+    // s_cmp_lg_u32 (s_and_b32 $src, 2^n), 2^n => s_bitcmp0_b32 $src, n
+    // s_cmp_lg_i32 (s_and_b32 $src, 2^n), 2^n => s_bitcmp0_b32 $src, n
+    // s_cmp_lg_u64 (s_and_b64 $src, 2^n), 2^n => s_bitcmp0_b64 $src, n
 
     MachineInstr *Def = MRI->getUniqueVRegDef(SrcReg);
     if (!Def || Def->getParent() != CmpInstr.getParent())
       return false;
 
     if (Def->getOpcode() != AMDGPU::S_AND_B32 &&
         Def->getOpcode() != AMDGPU::S_AND_B64)
       return false;
 
-    const auto isMask = [](const MachineOperand* MO) -> bool {
-      int64_t Mask;
+    const auto isMask = [&Mask, SrcSize](const MachineOperand* MO) -> bool {
       if (MO->isImm())
         Mask = MO->getImm();
       else if (!getFoldableImm(MO, Mask))
         return false;
-      return Mask == 1;
+      Mask &= maxUIntN(SrcSize);
+      return isPowerOf2_64(Mask);
     };
 
     MachineOperand *SrcOp = &Def->getOperand(1);
     if (isMask(SrcOp))
       SrcOp = &Def->getOperand(2);
     else if (isMask(&Def->getOperand(2)))
       SrcOp = &Def->getOperand(1);
     else
       return false;
 
+    unsigned BitNo = countTrailingZeros((uint64_t)Mask);
+    if (IsSigned && BitNo == SrcSize - 1)
+      return false;
+
+    ExpectedValue <<= BitNo;
+
+    bool IsReversedCC = false;
+    if (CmpValue != ExpectedValue) {
+      if (!IsReversable)
+        return false;
+      IsReversedCC = CmpValue == (ExpectedValue ^ Mask);
+      if (!IsReversedCC)
+        return false;
+    }
+
     Register DefReg = Def->getOperand(0).getReg();
     if (IsReversedCC && !MRI->hasOneNonDBGUse(DefReg))
       return false;
 
     for (auto I = std::next(Def->getIterator()), E = CmpInstr.getIterator();
          I != E; ++I) {
       if (I->modifiesRegister(AMDGPU::SCC, &RI) ||
           I->killsRegister(AMDGPU::SCC, &RI))
         return false;
     }
 
     MachineOperand *SccDef = Def->findRegisterDefOperand(AMDGPU::SCC);
     SccDef->setIsDead(false);
     CmpInstr.eraseFromParent();
 
     if (!MRI->use_nodbg_empty(DefReg)) {
       assert(!IsReversedCC);
       return true;
     }
 
     // Replace AND with unused result with a S_BITCMP.
-    // TODO: If s_bitcmp can be used we are not limited to 1 and 0 but can
-    //       process any power of 2.
     MachineBasicBlock *MBB = Def->getParent();
 
     unsigned NewOpc = (SrcSize == 32) ? IsReversedCC ? AMDGPU::S_BITCMP0_B32
                                                      : AMDGPU::S_BITCMP1_B32
                                       : IsReversedCC ? AMDGPU::S_BITCMP0_B64
                                                      : AMDGPU::S_BITCMP1_B64;
 
     BuildMI(*MBB, Def, Def->getDebugLoc(), get(NewOpc))
       .add(*SrcOp)
-      .addImm(0);
+      .addImm(Log2_64(Mask));
     Def->eraseFromParent();
 
     return true;
   };
 
   switch (CmpInstr.getOpcode()) {
   default:
     break;
   case AMDGPU::S_CMP_EQ_U32:
   case AMDGPU::S_CMP_EQ_I32:
   case AMDGPU::S_CMPK_EQ_U32:
   case AMDGPU::S_CMPK_EQ_I32:
-    return optimizeCmpAnd(1, 32, true);
+    return optimizeCmpAnd(1, 32, true, false);
   case AMDGPU::S_CMP_GE_U32:
-  case AMDGPU::S_CMP_GE_I32:
   case AMDGPU::S_CMPK_GE_U32:
+    return optimizeCmpAnd(1, 32, false, false);
+  case AMDGPU::S_CMP_GE_I32:
   case AMDGPU::S_CMPK_GE_I32:
-    return optimizeCmpAnd(1, 32, false);
+    return optimizeCmpAnd(1, 32, false, true);
   case AMDGPU::S_CMP_EQ_U64:
-    return optimizeCmpAnd(1, 64, true);
+    return optimizeCmpAnd(1, 64, true, false);
   case AMDGPU::S_CMP_LG_U32:
   case AMDGPU::S_CMP_LG_I32:
   case AMDGPU::S_CMPK_LG_U32:
   case AMDGPU::S_CMPK_LG_I32:
-    return optimizeCmpAnd(0, 32, true);
+    return optimizeCmpAnd(0, 32, true, false);
   case AMDGPU::S_CMP_GT_U32:
-  case AMDGPU::S_CMP_GT_I32:
   case AMDGPU::S_CMPK_GT_U32:
+    return optimizeCmpAnd(0, 32, false, false);
+  case AMDGPU::S_CMP_GT_I32:
   case AMDGPU::S_CMPK_GT_I32:
-    return optimizeCmpAnd(0, 32, false);
+    return optimizeCmpAnd(0, 32, false, true);
   case AMDGPU::S_CMP_LG_U64:
-    return optimizeCmpAnd(0, 64, true);
+    return optimizeCmpAnd(0, 64, true, false);
   }
 
   return false;
 }

llvm/test/CodeGen/AMDGPU/optimize-compare.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
+
+define amdgpu_kernel void @if_masked_1(i32 %arg, i32 addrspace(1)* %p)  {
+; GCN-LABEL: if_masked_1:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_load_dword s4, s[0:1], 0x24
+; GCN-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
+; GCN-NEXT:    v_mov_b32_e32 v0, 0
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    s_bitcmp0_b32 s4, 0
+; GCN-NEXT:    s_cselect_b32 s0, 22, 33
+; GCN-NEXT:    v_mov_b32_e32 v1, s0
+; GCN-NEXT:    global_store_dword v0, v1, s[2:3]
+; GCN-NEXT:    s_endpgm
+  %and = and i32 %arg, 1
+  %cmp = icmp eq i32 %and, 0
+  %sel = select i1 %cmp, i32 22, i32 33
+  store i32 %sel, i32 addrspace(1)* %p
+  ret void
+}
+
+define amdgpu_kernel void @if_masked_1024(i32 %arg, i32 addrspace(1)* %p)  {
+; GCN-LABEL: if_masked_1024:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_load_dword s4, s[0:1], 0x24
+; GCN-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
+; GCN-NEXT:    v_mov_b32_e32 v0, 0
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    s_bitcmp0_b32 s4, 10
+; GCN-NEXT:    s_cselect_b32 s0, 22, 33
+; GCN-NEXT:    v_mov_b32_e32 v1, s0
+; GCN-NEXT:    global_store_dword v0, v1, s[2:3]
+; GCN-NEXT:    s_endpgm
+  %and = and i32 %arg, 1024
+  %cmp = icmp eq i32 %and, 0
+  %sel = select i1 %cmp, i32 22, i32 33
+  store i32 %sel, i32 addrspace(1)* %p
+  ret void
+}
+
+define amdgpu_kernel void @if_masked_0x80000000(i32 %arg, i32 addrspace(1)* %p)  {
+; GCN-LABEL: if_masked_0x80000000:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_load_dword s4, s[0:1], 0x24
+; GCN-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x2c
+; GCN-NEXT:    v_mov_b32_e32 v0, 0
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    s_bitcmp0_b32 s4, 31
+; GCN-NEXT:    s_cselect_b32 s0, 22, 33
+; GCN-NEXT:    v_mov_b32_e32 v1, s0
+; GCN-NEXT:    global_store_dword v0, v1, s[2:3]
+; GCN-NEXT:    s_endpgm
+  %and = and i32 %arg, 2147483648
+  %cmp = icmp eq i32 %and, 0
+  %sel = select i1 %cmp, i32 22, i32 33
+  store i32 %sel, i32 addrspace(1)* %p
+  ret void
+}
+
+; FIXME: this should result in "s_bitcmp0_b64 $arg, 63" or "s_bitcmp0_b32 $arg.sub1, 31"
+define amdgpu_kernel void @if_masked_0x8000000000000000(i64 %arg, i32 addrspace(1)* %p)  {
+; GCN-LABEL: if_masked_0x8000000000000000:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x24
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    s_mov_b32 s0, 0
+; GCN-NEXT:    v_mov_b32_e32 v0, 0
+; GCN-NEXT:    s_and_b32 s1, s1, 0x80000000
+; GCN-NEXT:    s_cmp_eq_u64 s[0:1], 0
+; GCN-NEXT:    s_cselect_b32 s0, 22, 33
+; GCN-NEXT:    v_mov_b32_e32 v1, s0
+; GCN-NEXT:    global_store_dword v0, v1, s[2:3]
+; GCN-NEXT:    s_endpgm
+  %and = and i64 %arg, 9223372036854775808
+  %cmp = icmp eq i64 %and, 0
+  %sel = select i1 %cmp, i32 22, i32 33
+  store i32 %sel, i32 addrspace(1)* %p
+  ret void
+}

llvm/test/CodeGen/AMDGPU/optimize-compare.mir

body:             |
 
   bb.1:
     successors: %bb.2(0x80000000)
 
   bb.2:
     S_ENDPGM 0
 
 ...
+
+---
+name:            and_1024_cmp_eq_u32_1024
+body:             |
+  ; GCN-LABEL: name: and_1024_cmp_eq_u32_1024
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 10, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 1024, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U32 killed %1:sreg_32, 1024, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_eq_u32_0x80000000
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_eq_u32_0x80000000
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 31, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U32 killed %1:sreg_32, 2147483648, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_ge_u32_0x80000000
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_ge_u32_0x80000000
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 31, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_GE_U32 killed %1:sreg_32, 2147483648, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_ge_i32_0x80000000
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_ge_i32_0x80000000
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 2147483648, killed [[COPY]], implicit-def dead $scc
+  ; GCN:   S_CMP_GE_I32 killed [[S_AND_B32_]], 2147483648, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_GE_I32 killed %1:sreg_32, 2147483648, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_1024_cmp_ge_i32_1024
+body:             |
+  ; GCN-LABEL: name: and_1024_cmp_ge_i32_1024
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 10, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 1024, killed %0, implicit-def dead $scc
+    S_CMP_GE_I32 killed %1:sreg_32, 1024, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_lg_i32_0
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_lg_i32_0
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 31, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_LG_I32 killed %1:sreg_32, 0, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_gt_i32_0
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_gt_i32_0
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 2147483648, killed [[COPY]], implicit-def dead $scc
+  ; GCN:   S_CMP_GT_I32 killed [[S_AND_B32_]], 0, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_GT_I32 killed %1:sreg_32, 0, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_gt_u32_0
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_gt_u32_0
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 31, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_GT_U32 killed %1:sreg_32, 0, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_eq_u64_0x80000000
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_eq_u64_0x80000000
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+  ; GCN:   S_BITCMP1_B64 killed [[COPY]], 35, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0_sgpr1, $vgpr0_vgpr1
+
+    %0:sreg_64 = COPY $sgpr0_sgpr1
+    %1:sreg_64 = S_AND_B64 34359738368, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U64 killed %1:sreg_64, 34359738368, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x8000000000000000_cmp_eq_u64_0x8000000000000000
+body:             |
+  ; GCN-LABEL: name: and_0x8000000000000000_cmp_eq_u64_0x8000000000000000
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+  ; GCN:   S_BITCMP1_B64 killed [[COPY]], 63, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0_sgpr1, $vgpr0_vgpr1
+
+    %0:sreg_64 = COPY $sgpr0_sgpr1
+    %1:sreg_64 = S_AND_B64 9223372036854775808, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U64 killed %1:sreg_64, 9223372036854775808, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_2_cmp_eq_u32_2_used_and
+body:             |
+  ; GCN-LABEL: name: and_2_cmp_eq_u32_2_used_and
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 2, killed [[COPY]], implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN:   S_NOP 0, implicit [[S_AND_B32_]]
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U32 killed %1:sreg_32, 2, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+    S_NOP 0, implicit %1
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_3_cmp_eq_u32_3
+body:             |
+  ; GCN-LABEL: name: and_3_cmp_eq_u32_3
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 3, killed [[COPY]], implicit-def dead $scc
+  ; GCN:   S_CMP_EQ_U32 killed [[S_AND_B32_]], 3, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 3, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U32 killed %1:sreg_32, 3, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_3_cmp_lg_u32_0
+body:             |
+  ; GCN-LABEL: name: and_3_cmp_lg_u32_0
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 3, killed [[COPY]], implicit-def dead $scc
+  ; GCN:   S_CMP_LG_U32 killed [[S_AND_B32_]], 0, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 3, killed %0, implicit-def dead $scc
+    S_CMP_LG_U32 killed %1:sreg_32, 0, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_4_cmp_lg_u32_0
+body:             |
+  ; GCN-LABEL: name: and_4_cmp_lg_u32_0
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP1_B32 killed [[COPY]], 2, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 4, killed %0, implicit-def dead $scc
+    S_CMP_LG_U32 killed %1:sreg_32, 0, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x80000000_cmp_eq_u32_0
+body:             |
+  ; GCN-LABEL: name: and_0x80000000_cmp_eq_u32_0
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_32 = COPY $sgpr0
+  ; GCN:   S_BITCMP0_B32 killed [[COPY]], 31, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0, $vgpr0_vgpr1
+
+    %0:sreg_32 = COPY $sgpr0
+    %1:sreg_32 = S_AND_B32 2147483648, killed %0, implicit-def dead $scc
+    S_CMP_EQ_U32 killed %1:sreg_32, 0, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...
+
+---
+name:            and_0x8000000000000000_cmp_lg_u64_0x8000000000000000
+body:             |
+  ; GCN-LABEL: name: and_0x8000000000000000_cmp_lg_u64_0x8000000000000000
+  ; GCN: bb.0:
+  ; GCN:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
+  ; GCN:   [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+  ; GCN:   S_BITCMP0_B64 killed [[COPY]], 63, implicit-def $scc
+  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
+  ; GCN:   S_BRANCH %bb.1
+  ; GCN: bb.1:
+  ; GCN:   successors: %bb.2(0x80000000)
+  ; GCN: bb.2:
+  ; GCN:   S_ENDPGM 0
+  bb.0:
+    successors: %bb.1(0x40000000), %bb.2(0x40000000)
+    liveins: $sgpr0_sgpr1, $vgpr0_vgpr1
+
+    %0:sreg_64 = COPY $sgpr0_sgpr1
+    %1:sreg_64 = S_AND_B64 9223372036854775808, killed %0, implicit-def dead $scc
+    S_CMP_LG_U64 killed %1:sreg_64, 9223372036854775808, implicit-def $scc
+    S_CBRANCH_SCC0 %bb.2, implicit $scc
+    S_BRANCH %bb.1
+
+  bb.1:
+    successors: %bb.2(0x80000000)
+
+  bb.2:
+    S_ENDPGM 0
+
+...