AMDGPU/GlobalISel: Fix missing impdef of scc on boolean bit ops

llvm · Feb 15, 2020 · 8d8d46b · 8d8d46b
1 parent 6d2d589
commit 8d8d46b
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Showing 4 changed files with 35 additions and 30 deletions.
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
@@ -284,6 +284,11 @@ bool AMDGPUInstructionSelector::selectG_AND_OR_XOR(MachineInstr &I) const {
     unsigned InstOpc = getLogicalBitOpcode(I.getOpcode(),
                                            RC == &AMDGPU::SReg_64RegClass);
     I.setDesc(TII.get(InstOpc));
+    // Dead implicit-def of scc
+    I.addOperand(MachineOperand::CreateReg(AMDGPU::SCC, true, // isDef
+                                           true, // isImp
+                                           false, // isKill
+                                           true)); // isDead
 
     // FIXME: Hack to avoid turning the register bank into a register class.
     // The selector for G_ICMP relies on seeing the register bank for the result

diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-and.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-and.mir
@@ -20,7 +20,7 @@ body: |
     ; WAVE64: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
     ; WAVE64: [[V_CMP_EQ_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_EQ_U32_e64 [[COPY]], [[V_MOV_B32_e32_]], implicit $exec
     ; WAVE64: [[V_CMP_EQ_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_EQ_U32_e64 [[COPY1]], [[V_MOV_B32_e32_]], implicit $exec
-    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]]
+    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: S_ENDPGM 0, implicit [[S_AND_B64_]]
     ; WAVE32-LABEL: name: and_s1_vcc_vcc_vcc
     ; WAVE32: liveins: $vgpr0, $vgpr1
@@ -30,7 +30,7 @@ body: |
     ; WAVE32: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
     ; WAVE32: [[V_CMP_EQ_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_EQ_U32_e64 [[COPY]], [[V_MOV_B32_e32_]], implicit $exec
     ; WAVE32: [[V_CMP_EQ_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_EQ_U32_e64 [[COPY1]], [[V_MOV_B32_e32_]], implicit $exec
-    ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]]
+    ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: S_ENDPGM 0, implicit [[S_AND_B32_]]
     %0:vgpr(s32) = COPY $vgpr0
     %1:vgpr(s32) = COPY $vgpr1
@@ -378,11 +378,11 @@ tracksRegLiveness: true
 body: |
   bb.0:
     ; WAVE64-LABEL: name: and_s1_vcc_undef_vcc_undef_vcc
-    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 undef %1:sreg_64, undef %2:sreg_64
+    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 undef %1:sreg_64, undef %2:sreg_64, implicit-def dead $scc
     ; WAVE64: S_ENDPGM 0, implicit [[S_AND_B64_]]
     ; WAVE32-LABEL: name: and_s1_vcc_undef_vcc_undef_vcc
     ; WAVE32: $vcc_hi = IMPLICIT_DEF
-    ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 undef %1:sreg_32, undef %2:sreg_32
+    ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 undef %1:sreg_32, undef %2:sreg_32, implicit-def dead $scc
     ; WAVE32: S_ENDPGM 0, implicit [[S_AND_B32_]]
     %2:vcc(s1) = G_AND undef %0:vcc(s1), undef %1:vcc(s1)
     S_ENDPGM 0, implicit %2
@@ -445,7 +445,7 @@ body: |
     ; WAVE64: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE64: [[V_AND_B32_e32_1:%[0-9]+]]:vgpr_32 = V_AND_B32_e32 1, [[COPY1]], implicit $exec
     ; WAVE64: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_1]], implicit $exec
-    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: S_ENDPGM 0, implicit [[S_AND_B64_]]
     ; WAVE32-LABEL: name: and_s1_vcc_copy_to_vcc
     ; WAVE32: liveins: $vgpr0, $vgpr1
@@ -456,7 +456,7 @@ body: |
     ; WAVE32: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE32: [[V_AND_B32_e32_1:%[0-9]+]]:vgpr_32 = V_AND_B32_e32 1, [[COPY1]], implicit $exec
     ; WAVE32: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_1]], implicit $exec
-    ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: S_ENDPGM 0, implicit [[S_AND_B32_]]
     %0:vgpr(s32) = COPY $vgpr0
     %1:vgpr(s32) = COPY $vgpr1
@@ -489,7 +489,7 @@ body:             |
     ; WAVE64: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE64: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE64: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64_xexec = S_AND_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64_xexec = S_AND_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY [[S_AND_B64_]]
     ; WAVE64: S_ENDPGM 0, implicit [[COPY1]]
     ; WAVE32-LABEL: name: copy_select_constrain_vcc_result_reg_wave32
@@ -501,7 +501,7 @@ body:             |
     ; WAVE32: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE32: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE32: [[S_AND_B32_1:%[0-9]+]]:sreg_32 = S_AND_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE32: [[S_AND_B32_1:%[0-9]+]]:sreg_32 = S_AND_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY [[S_AND_B32_1]]
     ; WAVE32: S_ENDPGM 0, implicit [[COPY1]]
     %1:vgpr(s32) = COPY $vgpr0
@@ -535,7 +535,7 @@ body:             |
     ; WAVE64: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE64: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE64: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE64: [[S_AND_B64_:%[0-9]+]]:sreg_64 = S_AND_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY [[S_AND_B64_]]
     ; WAVE64: S_ENDPGM 0, implicit [[COPY1]]
     ; WAVE32-LABEL: name: copy_select_constrain_vcc_result_reg_wave64
@@ -547,7 +547,7 @@ body:             |
     ; WAVE32: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE32: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE32: [[S_AND_B32_1:%[0-9]+]]:sreg_32_xm0_xexec = S_AND_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE32: [[S_AND_B32_1:%[0-9]+]]:sreg_32_xm0_xexec = S_AND_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY [[S_AND_B32_1]]
     ; WAVE32: S_ENDPGM 0, implicit [[COPY1]]
     %1:vgpr(s32) = COPY $vgpr0

diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-or.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-or.mir
@@ -20,7 +20,7 @@ body: |
     ; WAVE64: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
     ; WAVE64: [[V_CMP_EQ_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_EQ_U32_e64 [[COPY]], [[V_MOV_B32_e32_]], implicit $exec
     ; WAVE64: [[V_CMP_EQ_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_EQ_U32_e64 [[COPY1]], [[V_MOV_B32_e32_]], implicit $exec
-    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]]
+    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: S_ENDPGM 0, implicit [[S_OR_B64_]]
     ; WAVE32-LABEL: name: or_s1_vcc_vcc_vcc
     ; WAVE32: liveins: $vgpr0, $vgpr1
@@ -30,7 +30,7 @@ body: |
     ; WAVE32: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
     ; WAVE32: [[V_CMP_EQ_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_EQ_U32_e64 [[COPY]], [[V_MOV_B32_e32_]], implicit $exec
     ; WAVE32: [[V_CMP_EQ_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_EQ_U32_e64 [[COPY1]], [[V_MOV_B32_e32_]], implicit $exec
-    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]]
+    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 [[V_CMP_EQ_U32_e64_]], [[V_CMP_EQ_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: S_ENDPGM 0, implicit [[S_OR_B32_]]
     %0:vgpr(s32) = COPY $vgpr0
     %1:vgpr(s32) = COPY $vgpr1
@@ -378,11 +378,11 @@ tracksRegLiveness: true
 body: |
   bb.0:
     ; WAVE64-LABEL: name: or_s1_vcc_undef_vcc_undef_vcc
-    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 undef %1:sreg_64, undef %2:sreg_64
+    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 undef %1:sreg_64, undef %2:sreg_64, implicit-def dead $scc
     ; WAVE64: S_ENDPGM 0, implicit [[S_OR_B64_]]
     ; WAVE32-LABEL: name: or_s1_vcc_undef_vcc_undef_vcc
     ; WAVE32: $vcc_hi = IMPLICIT_DEF
-    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 undef %1:sreg_32, undef %2:sreg_32
+    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 undef %1:sreg_32, undef %2:sreg_32, implicit-def dead $scc
     ; WAVE32: S_ENDPGM 0, implicit [[S_OR_B32_]]
     %2:vcc(s1) = G_OR undef %0:vcc(s1), undef %1:vcc(s1)
     S_ENDPGM 0, implicit %2
@@ -445,7 +445,7 @@ body: |
     ; WAVE64: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE64: [[V_AND_B32_e32_1:%[0-9]+]]:vgpr_32 = V_AND_B32_e32 1, [[COPY1]], implicit $exec
     ; WAVE64: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_1]], implicit $exec
-    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: S_ENDPGM 0, implicit [[S_OR_B64_]]
     ; WAVE32-LABEL: name: or_s1_vcc_copy_to_vcc
     ; WAVE32: liveins: $vgpr0, $vgpr1
@@ -456,7 +456,7 @@ body: |
     ; WAVE32: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE32: [[V_AND_B32_e32_1:%[0-9]+]]:vgpr_32 = V_AND_B32_e32 1, [[COPY1]], implicit $exec
     ; WAVE32: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_1]], implicit $exec
-    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: S_ENDPGM 0, implicit [[S_OR_B32_]]
     %0:vgpr(s32) = COPY $vgpr0
     %1:vgpr(s32) = COPY $vgpr1
@@ -489,7 +489,7 @@ body:             |
     ; WAVE64: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE64: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE64: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64_xexec = S_OR_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64_xexec = S_OR_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY [[S_OR_B64_]]
     ; WAVE64: S_ENDPGM 0, implicit [[COPY1]]
     ; WAVE32-LABEL: name: copy_select_constrain_vcc_result_reg_wave32
@@ -501,7 +501,7 @@ body:             |
     ; WAVE32: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE32: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32 = S_OR_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: [[COPY1:%[0-9]+]]:sreg_32_xm0 = COPY [[S_OR_B32_]]
     ; WAVE32: S_ENDPGM 0, implicit [[COPY1]]
     %1:vgpr(s32) = COPY $vgpr0
@@ -535,7 +535,7 @@ body:             |
     ; WAVE64: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE64: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE64: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_64 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE64: [[S_OR_B64_:%[0-9]+]]:sreg_64 = S_OR_B64 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE64: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY [[S_OR_B64_]]
     ; WAVE64: S_ENDPGM 0, implicit [[COPY1]]
     ; WAVE32-LABEL: name: copy_select_constrain_vcc_result_reg_wave64
@@ -547,7 +547,7 @@ body:             |
     ; WAVE32: [[V_CMP_NE_U32_e64_:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[V_AND_B32_e32_]], implicit $exec
     ; WAVE32: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 1, [[S_MOV_B32_]], implicit-def $scc
     ; WAVE32: [[V_CMP_NE_U32_e64_1:%[0-9]+]]:sreg_32 = V_CMP_NE_U32_e64 0, [[S_AND_B32_]], implicit $exec
-    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32_xm0_xexec = S_OR_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]]
+    ; WAVE32: [[S_OR_B32_:%[0-9]+]]:sreg_32_xm0_xexec = S_OR_B32 [[V_CMP_NE_U32_e64_]], [[V_CMP_NE_U32_e64_1]], implicit-def dead $scc
     ; WAVE32: [[COPY1:%[0-9]+]]:sreg_64_xexec = COPY [[S_OR_B32_]]
     ; WAVE32: S_ENDPGM 0, implicit [[COPY1]]
     %1:vgpr(s32) = COPY $vgpr0