AMDGPU: Try to select fneg modifier from xor

[arsenm]

Summary

I'm somewhat unhappy with needing to do this. Ideally we could
unconditionally turn all of these into fnegs, but that's going
to confuse other integer patterns that want to look for xor. We
either have to complicate those, or special case this.

[arsenm]

This does break /llvm/test/CodeGen/AMDGPU/post-ra-soft-clause-dbg-info.ll for reasons I don't understand (the register references go to undef)

[Pierre-vh]

llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp

2568

Can we just do the stripBitcast call earlier? (at Src = In)
That way it simplifies the condition a bit (you can have a if/else if)

2569

Can you add a comment explaining why we need this special-case (like in the commit message) ?

[arsenm]

Rebase and add comment

[arsenm]

ping

llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp

2568

It would work but adds code in the common case

[sebastian-ne]

llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp

2568

Just guessing into the dark for why post-ra-soft-clause-dbg-info.ll is failing, but it could be because of this stripBitcast.
The code is

v1 = global_load_dword
v1_cast = bitcast i32 v1 to float
debug_value(v1_cast)
v_add_f32 v1_cast, v2

The cast is stripped here (it wasn’t before), so we get

v1 = global_load_dword
v1_cast = bitcast i32 v1 to float
debug_value(v1_cast)
v_add_f32 v1, v2     // <- no cast here anymore

and v1_cast is unused, except for the debug_value.

Dead code elimination removes the bitcast, because it has only debug uses and we get

v1 = global_load_dword
debug_value(<deleted>)
v_add_f32 v1, v2

llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp

bool AMDGPUDAGToDAGISel::SelectVOP3ModsImpl(SDValue In, SDValue &Src,
                                             unsigned &Mods,
                                             bool AllowAbs) const {
   Mods = 0;
   Src = In;
 
   if (Src.getOpcode() == ISD::FNEG) {
     Mods |= SISrcMods::NEG;
     Src = Src.getOperand(0);
+  } else {
+    Src = stripBitcast(Src);
+    if (Src.getOpcode() == ISD::XOR) {
+      // Match an integer fneg
+      //
+      // Ideally we could unconditionally turn all of these into fnegs, but that
+      // would confuse other integer patterns that want to look for xor.
+      auto *SignMask = dyn_cast<ConstantSDNode>(Src.getOperand(1));
+      if (SignMask && SignMask->getAPIntValue().isSignMask()) {
+        Mods |= SISrcMods::NEG;
+        Src = Src.getOperand(0);
+      }
+    }
   }
 
   if (AllowAbs && Src.getOpcode() == ISD::FABS) {
     Mods |= SISrcMods::ABS;
     Src = Src.getOperand(0);
   }
 
   return true;

llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll

; GFX11-NEXT:    s_setpc_b64 s[30:31]
   ret i64 %fneg
 }
 
 define i32 @select_fneg_xor_select_i32(i1 %cond0, i1 %cond1, i32 %arg0, i32 %arg1) {
 ; GCN-LABEL: select_fneg_xor_select_i32:
 ; GCN:       ; %bb.0:
 ; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-NEXT:    v_and_b32_e32 v0, 1, v0
-; GCN-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v0
 ; GCN-NEXT:    v_and_b32_e32 v1, 1, v1
-; GCN-NEXT:    v_cndmask_b32_e32 v0, v2, v3, vcc
-; GCN-NEXT:    v_xor_b32_e32 v2, 0x80000000, v0
+; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v0
+; GCN-NEXT:    v_cndmask_b32_e64 v0, -v2, v3, vcc
 ; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v1
-; GCN-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, -v0, vcc
 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX11-LABEL: select_fneg_xor_select_i32:
 ; GFX11:       ; %bb.0:
 ; GFX11-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX11-NEXT:    s_waitcnt_vscnt null, 0x0
 ; GFX11-NEXT:    v_and_b32_e32 v0, 1, v0
-; GFX11-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
 ; GFX11-NEXT:    v_and_b32_e32 v1, 1, v1
-; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_3) | instskip(NEXT) | instid1(VALU_DEP_3)
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_2) | instskip(SKIP_1) | instid1(VALU_DEP_3)
 ; GFX11-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 1, v0
-; GFX11-NEXT:    v_cndmask_b32_e32 v0, v2, v3, vcc_lo
-; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_3) | instskip(NEXT) | instid1(VALU_DEP_2)
+; GFX11-NEXT:    v_cndmask_b32_e64 v0, -v2, v3, vcc_lo
 ; GFX11-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 1, v1
-; GFX11-NEXT:    v_xor_b32_e32 v2, 0x80000000, v0
-; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
-; GFX11-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc_lo
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_2)
+; GFX11-NEXT:    v_cndmask_b32_e64 v0, v0, -v0, vcc_lo
 ; GFX11-NEXT:    s_setpc_b64 s[30:31]
   %fneg0 = xor i32 %arg0, -2147483648
   %select0 = select i1 %cond0, i32 %arg1, i32 %fneg0
   %fneg1 = xor i32 %select0, -2147483648
   %select1 = select i1 %cond1, i32 %fneg1, i32 %select0
   ret i32 %select1
 }
 
; GFX11-NEXT:    s_setpc_b64 s[30:31]
   ret double %select1
 }
 
 define i64 @select_fneg_xor_select_i64(i1 %cond0, i1 %cond1, i64 %arg0, i64 %arg1) {
 ; GCN-LABEL: select_fneg_xor_select_i64:
 ; GCN:       ; %bb.0:
 ; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GCN-NEXT:    v_and_b32_e32 v0, 1, v0
-; GCN-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v0
 ; GCN-NEXT:    v_and_b32_e32 v1, 1, v1
+; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v0
 ; GCN-NEXT:    v_cndmask_b32_e32 v0, v2, v4, vcc
-; GCN-NEXT:    v_cndmask_b32_e32 v2, v3, v5, vcc
-; GCN-NEXT:    v_xor_b32_e32 v3, 0x80000000, v2
+; GCN-NEXT:    v_cndmask_b32_e64 v2, -v3, v5, vcc
 ; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v1
-; GCN-NEXT:    v_cndmask_b32_e32 v1, v2, v3, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v2, -v2, vcc
 ; GCN-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX11-LABEL: select_fneg_xor_select_i64:
 ; GFX11:       ; %bb.0:
 ; GFX11-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX11-NEXT:    s_waitcnt_vscnt null, 0x0
 ; GFX11-NEXT:    v_and_b32_e32 v0, 1, v0
-; GFX11-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX11-NEXT:    v_and_b32_e32 v1, 1, v1
-; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_3) | instskip(SKIP_1) | instid1(VALU_DEP_4)
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1) | instskip(SKIP_2) | instid1(VALU_DEP_2)
 ; GFX11-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 1, v0
-; GFX11-NEXT:    v_cndmask_b32_e32 v0, v2, v4, vcc_lo
-; GFX11-NEXT:    v_cndmask_b32_e32 v2, v3, v5, vcc_lo
-; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_4) | instskip(NEXT) | instid1(VALU_DEP_2)
+; GFX11-NEXT:    v_dual_cndmask_b32 v0, v2, v4 :: v_dual_and_b32 v1, 1, v1
+; GFX11-NEXT:    v_cndmask_b32_e64 v2, -v3, v5, vcc_lo
 ; GFX11-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 1, v1
-; GFX11-NEXT:    v_xor_b32_e32 v3, 0x80000000, v2
-; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
-; GFX11-NEXT:    v_cndmask_b32_e32 v1, v2, v3, vcc_lo
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_2)
+; GFX11-NEXT:    v_cndmask_b32_e64 v1, v2, -v2, vcc_lo
 ; GFX11-NEXT:    s_setpc_b64 s[30:31]
   %fneg0 = xor i64 %arg0, 9223372036854775808
   %select0 = select i1 %cond0, i64 %arg1, i64 %fneg0
   %fneg1 = xor i64 %select0, 9223372036854775808
   %select1 = select i1 %cond1, i64 %fneg1, i64 %select0
   ret i64 %select1
 }
 

llvm/test/CodeGen/AMDGPU/saddsat.ll

 define i32 @v_saddsat_i32(i32 %lhs, i32 %rhs) {
 ; GFX6-LABEL: v_saddsat_i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_gt_i32_e32 vcc, 0, v1
 ; GFX6-NEXT:    v_add_i32_e64 v1, s[4:5], v0, v1
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v1, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v1
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v1, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v1, -v0, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_saddsat_i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_gt_i32_e32 vcc, 0, v1
 ; GFX8-NEXT:    v_add_u32_e64 v1, s[4:5], v0, v1
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v1, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v1
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v1, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v1, -v0, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_saddsat_i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_add_i32 v0, v0, v1 clamp
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;

 define <2 x i32> @v_saddsat_v2i32(<2 x i32> %lhs, <2 x i32> %rhs) {
 ; GFX6-LABEL: v_saddsat_v2i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_gt_i32_e32 vcc, 0, v2
 ; GFX6-NEXT:    v_add_i32_e64 v2, s[4:5], v0, v2
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v2
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v2, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v2, -v0, s[4:5]
 ; GFX6-NEXT:    v_add_i32_e64 v2, s[4:5], v1, v3
 ; GFX6-NEXT:    v_cmp_gt_i32_e32 vcc, 0, v3
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v1
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v2
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v2, v1, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v2, -v1, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_saddsat_v2i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_gt_i32_e32 vcc, 0, v2
 ; GFX8-NEXT:    v_add_u32_e64 v2, s[4:5], v0, v2
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v2
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v2, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v2, -v0, s[4:5]
 ; GFX8-NEXT:    v_add_u32_e64 v2, s[4:5], v1, v3
 ; GFX8-NEXT:    v_cmp_gt_i32_e32 vcc, 0, v3
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v1
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v2
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v2, v1, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v2, -v1, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_saddsat_v2i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_add_i32 v0, v0, v2 clamp
 ; GFX9-NEXT:    v_add_i32 v1, v1, v3 clamp
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]

 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_add_i32_e32 v4, vcc, v0, v2
 ; GFX6-NEXT:    v_addc_u32_e32 v5, vcc, v1, v3, vcc
 ; GFX6-NEXT:    v_cmp_lt_i64_e32 vcc, v[4:5], v[0:1]
 ; GFX6-NEXT:    v_cmp_gt_i64_e64 s[4:5], 0, v[2:3]
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX6-NEXT:    s_xor_b64 vcc, s[4:5], vcc
 ; GFX6-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_saddsat_i64:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_add_u32_e32 v4, vcc, v0, v2
 ; GFX8-NEXT:    v_addc_u32_e32 v5, vcc, v1, v3, vcc
 ; GFX8-NEXT:    v_cmp_lt_i64_e32 vcc, v[4:5], v[0:1]
 ; GFX8-NEXT:    v_cmp_gt_i64_e64 s[4:5], 0, v[2:3]
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX8-NEXT:    s_xor_b64 vcc, s[4:5], vcc
 ; GFX8-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_saddsat_i64:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_add_co_u32_e32 v4, vcc, v0, v2
 ; GFX9-NEXT:    v_addc_co_u32_e32 v5, vcc, v1, v3, vcc
 ; GFX9-NEXT:    v_cmp_lt_i64_e32 vcc, v[4:5], v[0:1]
 ; GFX9-NEXT:    v_cmp_gt_i64_e64 s[4:5], 0, v[2:3]
 ; GFX9-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX9-NEXT:    s_xor_b64 vcc, s[4:5], vcc
 ; GFX9-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc
-; GFX9-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX9-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc
+; GFX9-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX10-LABEL: v_saddsat_i64:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX10-NEXT:    s_waitcnt_vscnt null, 0x0
 ; GFX10-NEXT:    v_add_co_u32 v4, vcc_lo, v0, v2
 ; GFX10-NEXT:    v_add_co_ci_u32_e32 v5, vcc_lo, v1, v3, vcc_lo
 ; GFX10-NEXT:    v_cmp_gt_i64_e64 s4, 0, v[2:3]
-; GFX10-NEXT:    v_ashrrev_i32_e32 v6, 31, v5
 ; GFX10-NEXT:    v_cmp_lt_i64_e32 vcc_lo, v[4:5], v[0:1]
-; GFX10-NEXT:    v_xor_b32_e32 v1, 0x80000000, v6
+; GFX10-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX10-NEXT:    s_xor_b32 vcc_lo, s4, vcc_lo
-; GFX10-NEXT:    v_cndmask_b32_e32 v0, v4, v6, vcc_lo
-; GFX10-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc_lo
+; GFX10-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc_lo
+; GFX10-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc_lo
 ; GFX10-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX11-LABEL: v_saddsat_i64:
 ; GFX11:       ; %bb.0:
 ; GFX11-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX11-NEXT:    s_waitcnt_vscnt null, 0x0
 ; GFX11-NEXT:    v_add_co_u32 v4, vcc_lo, v0, v2
 ; GFX11-NEXT:    v_add_co_ci_u32_e32 v5, vcc_lo, v1, v3, vcc_lo
 ; GFX11-NEXT:    v_cmp_gt_i64_e64 s0, 0, v[2:3]
-; GFX11-NEXT:    v_ashrrev_i32_e32 v6, 31, v5
 ; GFX11-NEXT:    v_cmp_lt_i64_e32 vcc_lo, v[4:5], v[0:1]
-; GFX11-NEXT:    v_xor_b32_e32 v1, 0x80000000, v6
+; GFX11-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX11-NEXT:    s_xor_b32 vcc_lo, s0, vcc_lo
-; GFX11-NEXT:    v_dual_cndmask_b32 v0, v4, v6 :: v_dual_cndmask_b32 v1, v5, v1
+; GFX11-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc_lo
+; GFX11-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc_lo
 ; GFX11-NEXT:    s_setpc_b64 s[30:31]
   %result = call i64 @llvm.sadd.sat.i64(i64 %lhs, i64 %rhs)
   ret i64 %result
 }
 
 declare i8 @llvm.sadd.sat.i8(i8, i8) #0
 declare i16 @llvm.sadd.sat.i16(i16, i16) #0
 declare <2 x i16> @llvm.sadd.sat.v2i16(<2 x i16>, <2 x i16>) #0
 declare <3 x i16> @llvm.sadd.sat.v3i16(<3 x i16>, <3 x i16>) #0
 declare <4 x i16> @llvm.sadd.sat.v4i16(<4 x i16>, <4 x i16>) #0
 declare i32 @llvm.sadd.sat.i32(i32, i32) #0
 declare <2 x i32> @llvm.sadd.sat.v2i32(<2 x i32>, <2 x i32>) #0
 declare i64 @llvm.sadd.sat.i64(i64, i64) #0

llvm/test/CodeGen/AMDGPU/ssubsat.ll

 define i32 @v_ssubsat_i32(i32 %lhs, i32 %rhs) {
 ; GFX6-LABEL: v_ssubsat_i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v1
 ; GFX6-NEXT:    v_sub_i32_e64 v1, s[4:5], v0, v1
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v1, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v1
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v1, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v1, -v0, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v1
 ; GFX8-NEXT:    v_sub_u32_e64 v1, s[4:5], v0, v1
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v1, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v1
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v1, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v1, -v0, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_i32 v0, v0, v1 clamp
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;

 define <2 x i32> @v_ssubsat_v2i32(<2 x i32> %lhs, <2 x i32> %rhs) {
 ; GFX6-LABEL: v_ssubsat_v2i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v2
 ; GFX6-NEXT:    v_sub_i32_e64 v2, s[4:5], v0, v2
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v2
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v2, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v2, -v0, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v2, s[4:5], v1, v3
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v3
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v1
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v2
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v2, v1, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v2, -v1, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_v2i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v2
 ; GFX8-NEXT:    v_sub_u32_e64 v2, s[4:5], v0, v2
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v2
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v2, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v2, -v0, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v2, s[4:5], v1, v3
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v3
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v2, v1
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v2
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v2, v1, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v2, -v1, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_v2i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_i32 v0, v0, v2 clamp
 ; GFX9-NEXT:    v_sub_i32 v1, v1, v3 clamp
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]

 define <3 x i32> @v_ssubsat_v3i32(<3 x i32> %lhs, <3 x i32> %rhs) {
 ; GFX6-LABEL: v_ssubsat_v3i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v3
 ; GFX6-NEXT:    v_sub_i32_e64 v3, s[4:5], v0, v3
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v3, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v3
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v3, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v3, -v0, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v3, s[4:5], v1, v4
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v4
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v3, v1
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v3
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v3, v1, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v3, -v1, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v3, s[4:5], v2, v5
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v5
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v3, v2
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v2, 31, v3
-; GFX6-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v2, v3, v2, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v2, v3, -v2, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_v3i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v3
 ; GFX8-NEXT:    v_sub_u32_e64 v3, s[4:5], v0, v3
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v3, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v3
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v3, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v3, -v0, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v3, s[4:5], v1, v4
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v4
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v3, v1
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v3
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v3, v1, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v3, -v1, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v3, s[4:5], v2, v5
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v5
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v3, v2
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v2, 31, v3
-; GFX8-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v2, v3, v2, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v2, v3, -v2, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_v3i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_i32 v0, v0, v3 clamp
 ; GFX9-NEXT:    v_sub_i32 v1, v1, v4 clamp
 ; GFX9-NEXT:    v_sub_i32 v2, v2, v5 clamp

 define <4 x i32> @v_ssubsat_v4i32(<4 x i32> %lhs, <4 x i32> %rhs) {
 ; GFX6-LABEL: v_ssubsat_v4i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v4
 ; GFX6-NEXT:    v_sub_i32_e64 v4, s[4:5], v0, v4
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v4
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v4, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v4, -v0, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v4, s[4:5], v1, v5
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v5
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v1
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v4
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v4, v1, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v4, -v1, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v4, s[4:5], v2, v6
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v6
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v2
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v2, 31, v4
-; GFX6-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v2, v4, v2, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v2, v4, -v2, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v4, s[4:5], v3, v7
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v7
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v3
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v3, 31, v4
-; GFX6-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v3, v4, v3, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v3, v4, -v3, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_v4i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v4
 ; GFX8-NEXT:    v_sub_u32_e64 v4, s[4:5], v0, v4
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v4
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v4, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v4, -v0, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v4, s[4:5], v1, v5
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v5
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v1
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v4
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v4, v1, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v4, -v1, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v4, s[4:5], v2, v6
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v6
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v2
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v2, 31, v4
-; GFX8-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v2, v4, v2, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v2, v4, -v2, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v4, s[4:5], v3, v7
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v7
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v4, v3
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v3, 31, v4
-; GFX8-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v3, v4, v3, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v3, v4, -v3, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_v4i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_i32 v0, v0, v4 clamp
 ; GFX9-NEXT:    v_sub_i32 v1, v1, v5 clamp
 ; GFX9-NEXT:    v_sub_i32 v2, v2, v6 clamp

 define <8 x i32> @v_ssubsat_v8i32(<8 x i32> %lhs, <8 x i32> %rhs) {
 ; GFX6-LABEL: v_ssubsat_v8i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v8
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v0, v8
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v8, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v8, -v0, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v1, v9
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v9
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v1
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v8, v1, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v8, -v1, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v2, v10
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v10
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v2
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v2, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v2, v8, v2, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v2, v8, -v2, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v3, v11
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v11
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v3
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v3, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v3, v8, v3, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v3, v8, -v3, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v4, v12
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v12
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v4
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v4, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v4, 0x80000000, v4
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v4, v8, v4, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v4, v8, -v4, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v5, v13
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v13
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v5
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v5, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v5, 0x80000000, v5
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v5, v8, v5, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v5, v8, -v5, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v6, v14
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v14
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v6
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v6, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v6, 0x80000000, v6
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v6, v8, v6, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v6, v8, -v6, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v8, s[4:5], v7, v15
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v15
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v7
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v7, 31, v8
-; GFX6-NEXT:    v_xor_b32_e32 v7, 0x80000000, v7
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v7, v8, v7, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v7, v8, -v7, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_v8i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v8
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v0, v8
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v8, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v8, -v0, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v1, v9
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v9
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v1
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v8, v1, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v8, -v1, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v2, v10
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v10
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v2
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v2, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v2, v8, v2, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v2, v8, -v2, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v3, v11
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v11
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v3
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v3, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v3, v8, v3, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v3, v8, -v3, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v4, v12
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v12
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v4
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v4, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v4, 0x80000000, v4
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v4, v8, v4, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v4, v8, -v4, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v5, v13
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v13
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v5
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v5, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v5, 0x80000000, v5
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v5, v8, v5, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v5, v8, -v5, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v6, v14
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v14
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v6
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v6, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v6, 0x80000000, v6
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v6, v8, v6, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v6, v8, -v6, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v8, s[4:5], v7, v15
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v15
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v8, v7
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v7, 31, v8
-; GFX8-NEXT:    v_xor_b32_e32 v7, 0x80000000, v7
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v7, v8, v7, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v7, v8, -v7, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_v8i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_i32 v0, v0, v8 clamp
 ; GFX9-NEXT:    v_sub_i32 v1, v1, v9 clamp
 ; GFX9-NEXT:    v_sub_i32 v2, v2, v10 clamp

 define <16 x i32> @v_ssubsat_v16i32(<16 x i32> %lhs, <16 x i32> %rhs) {
 ; GFX6-LABEL: v_ssubsat_v16i32:
 ; GFX6:       ; %bb.0:
 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v16
 ; GFX6-NEXT:    v_sub_i32_e64 v16, s[4:5], v0, v16
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v0
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v0, 31, v16
-; GFX6-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v16, v0, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v0, v16, -v0, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v16, s[4:5], v1, v17
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v17
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v1
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v16
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v16, v1, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v16, -v1, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v16, s[4:5], v2, v18
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v18
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v2
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v2, 31, v16
-; GFX6-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v2, v16, v2, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v2, v16, -v2, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v16, s[4:5], v3, v19
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v19
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v3
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v3, 31, v16
-; GFX6-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v3, v16, v3, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v3, v16, -v3, s[4:5]
 ; GFX6-NEXT:    buffer_load_dword v16, off, s[0:3], s32
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v4, v20
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v20
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v4
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v4, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v4, 0x80000000, v4
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v4, v17, v4, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v4, v17, -v4, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v5, v21
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v21
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v5
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v5, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v5, 0x80000000, v5
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v5, v17, v5, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v5, v17, -v5, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v6, v22
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v22
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v6
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v6, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v6, 0x80000000, v6
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v6, v17, v6, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v6, v17, -v6, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v7, v23
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v23
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v7
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v7, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v7, 0x80000000, v7
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v7, v17, v7, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v7, v17, -v7, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v8, v24
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v24
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v8
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v8, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v8, 0x80000000, v8
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v8, v17, v8, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v8, v17, -v8, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v9, v25
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v25
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v9
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v9, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v9, 0x80000000, v9
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v9, v17, v9, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v9, v17, -v9, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v10, v26
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v26
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v10
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v10, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v10, 0x80000000, v10
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v10, v17, v10, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v10, v17, -v10, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v11, v27
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v27
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v11
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v11, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v11, 0x80000000, v11
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v11, v17, v11, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v11, v17, -v11, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v12, v28
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v28
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v12
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v12, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v12, 0x80000000, v12
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v12, v17, v12, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v12, v17, -v12, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v13, v29
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v29
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v13
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v13, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v13, 0x80000000, v13
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v13, v17, v13, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v13, v17, -v13, s[4:5]
 ; GFX6-NEXT:    v_sub_i32_e64 v17, s[4:5], v14, v30
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v30
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v14
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v14, 31, v17
-; GFX6-NEXT:    v_xor_b32_e32 v14, 0x80000000, v14
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v14, v17, v14, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v14, v17, -v14, s[4:5]
 ; GFX6-NEXT:    s_waitcnt vmcnt(0)
 ; GFX6-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v16
 ; GFX6-NEXT:    v_sub_i32_e64 v16, s[4:5], v15, v16
 ; GFX6-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v15
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v15, 31, v16
-; GFX6-NEXT:    v_xor_b32_e32 v15, 0x80000000, v15
-; GFX6-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX6-NEXT:    v_cndmask_b32_e32 v15, v16, v15, vcc
+; GFX6-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX6-NEXT:    v_cndmask_b32_e64 v15, v16, -v15, s[4:5]
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_v16i32:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v16
 ; GFX8-NEXT:    v_sub_u32_e64 v16, s[4:5], v0, v16
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v0
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v0, 31, v16
-; GFX8-NEXT:    v_xor_b32_e32 v0, 0x80000000, v0
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v0, v16, v0, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v0, v16, -v0, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v16, s[4:5], v1, v17
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v17
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v1
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v16
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v16, v1, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v16, -v1, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v16, s[4:5], v2, v18
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v18
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v2
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v2, 31, v16
-; GFX8-NEXT:    v_xor_b32_e32 v2, 0x80000000, v2
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v2, v16, v2, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v2, v16, -v2, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v16, s[4:5], v3, v19
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v19
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v3
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v3, 31, v16
-; GFX8-NEXT:    v_xor_b32_e32 v3, 0x80000000, v3
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v3, v16, v3, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v3, v16, -v3, s[4:5]
 ; GFX8-NEXT:    buffer_load_dword v16, off, s[0:3], s32
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v4, v20
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v20
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v4
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v4, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v4, 0x80000000, v4
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v4, v17, v4, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v4, v17, -v4, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v5, v21
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v21
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v5
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v5, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v5, 0x80000000, v5
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v5, v17, v5, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v5, v17, -v5, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v6, v22
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v22
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v6
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v6, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v6, 0x80000000, v6
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v6, v17, v6, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v6, v17, -v6, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v7, v23
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v23
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v7
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v7, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v7, 0x80000000, v7
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v7, v17, v7, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v7, v17, -v7, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v8, v24
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v24
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v8
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v8, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v8, 0x80000000, v8
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v8, v17, v8, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v8, v17, -v8, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v9, v25
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v25
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v9
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v9, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v9, 0x80000000, v9
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v9, v17, v9, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v9, v17, -v9, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v10, v26
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v26
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v10
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v10, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v10, 0x80000000, v10
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v10, v17, v10, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v10, v17, -v10, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v11, v27
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v27
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v11
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v11, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v11, 0x80000000, v11
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v11, v17, v11, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v11, v17, -v11, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v12, v28
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v28
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v12
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v12, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v12, 0x80000000, v12
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v12, v17, v12, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v12, v17, -v12, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v13, v29
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v29
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v13
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v13, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v13, 0x80000000, v13
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v13, v17, v13, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v13, v17, -v13, s[4:5]
 ; GFX8-NEXT:    v_sub_u32_e64 v17, s[4:5], v14, v30
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v30
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v17, v14
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v14, 31, v17
-; GFX8-NEXT:    v_xor_b32_e32 v14, 0x80000000, v14
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v14, v17, v14, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v14, v17, -v14, s[4:5]
 ; GFX8-NEXT:    s_waitcnt vmcnt(0)
 ; GFX8-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v16
 ; GFX8-NEXT:    v_sub_u32_e64 v16, s[4:5], v15, v16
 ; GFX8-NEXT:    v_cmp_lt_i32_e64 s[4:5], v16, v15
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v15, 31, v16
-; GFX8-NEXT:    v_xor_b32_e32 v15, 0x80000000, v15
-; GFX8-NEXT:    s_xor_b64 vcc, vcc, s[4:5]
-; GFX8-NEXT:    v_cndmask_b32_e32 v15, v16, v15, vcc
+; GFX8-NEXT:    s_xor_b64 s[4:5], vcc, s[4:5]
+; GFX8-NEXT:    v_cndmask_b32_e64 v15, v16, -v15, s[4:5]
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_v16i32:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_i32 v0, v0, v16 clamp
 ; GFX9-NEXT:    buffer_load_dword v16, off, s[0:3], s32
 ; GFX9-NEXT:    v_sub_i32 v1, v1, v17 clamp

 ; GFX6-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX6-NEXT:    v_sub_i32_e32 v4, vcc, v0, v2
 ; GFX6-NEXT:    v_subb_u32_e32 v5, vcc, v1, v3, vcc
 ; GFX6-NEXT:    v_cmp_lt_i64_e32 vcc, v[4:5], v[0:1]
 ; GFX6-NEXT:    v_cmp_lt_i64_e64 s[4:5], 0, v[2:3]
 ; GFX6-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX6-NEXT:    s_xor_b64 vcc, s[4:5], vcc
 ; GFX6-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc
-; GFX6-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc
+; GFX6-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc
 ; GFX6-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX8-LABEL: v_ssubsat_i64:
 ; GFX8:       ; %bb.0:
 ; GFX8-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX8-NEXT:    v_sub_u32_e32 v4, vcc, v0, v2
 ; GFX8-NEXT:    v_subb_u32_e32 v5, vcc, v1, v3, vcc
 ; GFX8-NEXT:    v_cmp_lt_i64_e32 vcc, v[4:5], v[0:1]
 ; GFX8-NEXT:    v_cmp_lt_i64_e64 s[4:5], 0, v[2:3]
 ; GFX8-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX8-NEXT:    s_xor_b64 vcc, s[4:5], vcc
 ; GFX8-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc
-; GFX8-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX8-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc
+; GFX8-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc
 ; GFX8-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX9-LABEL: v_ssubsat_i64:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_sub_co_u32_e32 v4, vcc, v0, v2
 ; GFX9-NEXT:    v_subb_co_u32_e32 v5, vcc, v1, v3, vcc
 ; GFX9-NEXT:    v_cmp_lt_i64_e32 vcc, v[4:5], v[0:1]
 ; GFX9-NEXT:    v_cmp_lt_i64_e64 s[4:5], 0, v[2:3]
 ; GFX9-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX9-NEXT:    s_xor_b64 vcc, s[4:5], vcc
 ; GFX9-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc
-; GFX9-NEXT:    v_xor_b32_e32 v1, 0x80000000, v1
-; GFX9-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc
+; GFX9-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX10-LABEL: v_ssubsat_i64:
 ; GFX10:       ; %bb.0:
 ; GFX10-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX10-NEXT:    s_waitcnt_vscnt null, 0x0
 ; GFX10-NEXT:    v_sub_co_u32 v4, vcc_lo, v0, v2
 ; GFX10-NEXT:    v_sub_co_ci_u32_e32 v5, vcc_lo, v1, v3, vcc_lo
 ; GFX10-NEXT:    v_cmp_lt_i64_e64 s4, 0, v[2:3]
-; GFX10-NEXT:    v_ashrrev_i32_e32 v6, 31, v5
 ; GFX10-NEXT:    v_cmp_lt_i64_e32 vcc_lo, v[4:5], v[0:1]
-; GFX10-NEXT:    v_xor_b32_e32 v1, 0x80000000, v6
+; GFX10-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX10-NEXT:    s_xor_b32 vcc_lo, s4, vcc_lo
-; GFX10-NEXT:    v_cndmask_b32_e32 v0, v4, v6, vcc_lo
-; GFX10-NEXT:    v_cndmask_b32_e32 v1, v5, v1, vcc_lo
+; GFX10-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc_lo
+; GFX10-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc_lo
 ; GFX10-NEXT:    s_setpc_b64 s[30:31]
 ;
 ; GFX11-LABEL: v_ssubsat_i64:
 ; GFX11:       ; %bb.0:
 ; GFX11-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX11-NEXT:    s_waitcnt_vscnt null, 0x0
 ; GFX11-NEXT:    v_sub_co_u32 v4, vcc_lo, v0, v2
 ; GFX11-NEXT:    v_sub_co_ci_u32_e32 v5, vcc_lo, v1, v3, vcc_lo
 ; GFX11-NEXT:    v_cmp_lt_i64_e64 s0, 0, v[2:3]
-; GFX11-NEXT:    v_ashrrev_i32_e32 v6, 31, v5
 ; GFX11-NEXT:    v_cmp_lt_i64_e32 vcc_lo, v[4:5], v[0:1]
-; GFX11-NEXT:    v_xor_b32_e32 v1, 0x80000000, v6
+; GFX11-NEXT:    v_ashrrev_i32_e32 v1, 31, v5
 ; GFX11-NEXT:    s_xor_b32 vcc_lo, s0, vcc_lo
-; GFX11-NEXT:    v_dual_cndmask_b32 v0, v4, v6 :: v_dual_cndmask_b32 v1, v5, v1
+; GFX11-NEXT:    v_cndmask_b32_e32 v0, v4, v1, vcc_lo
+; GFX11-NEXT:    v_cndmask_b32_e64 v1, v5, -v1, vcc_lo
 ; GFX11-NEXT:    s_setpc_b64 s[30:31]
   %result = call i64 @llvm.ssub.sat.i64(i64 %lhs, i64 %rhs)
   ret i64 %result
 }
 
 declare i8 @llvm.ssub.sat.i8(i8, i8) #0
 declare i16 @llvm.ssub.sat.i16(i16, i16) #0
 declare <2 x i16> @llvm.ssub.sat.v2i16(<2 x i16>, <2 x i16>) #0