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AMDGPU: Make is.shared and is.private propagate poison #128617

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Merged
merged 1 commit into from
Feb 25, 2025
+20 −1
Merged

AMDGPU: Make is.shared and is.private propagate poison #128617

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5 changes: 4 additions & 1 deletion llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1256,7 +1256,10 @@ GCNTTIImpl::instCombineIntrinsic(InstCombiner &IC, IntrinsicInst &II) const {
}
case Intrinsic::amdgcn_is_shared:
case Intrinsic::amdgcn_is_private: {
if (isa<UndefValue>(II.getArgOperand(0)))
Value *Src = II.getArgOperand(0);
if (isa<PoisonValue>(Src))
return IC.replaceInstUsesWith(II, PoisonValue::get(II.getType()));
if (isa<UndefValue>(Src))
return IC.replaceInstUsesWith(II, UndefValue::get(II.getType()));

if (isa<ConstantPointerNull>(II.getArgOperand(0)))
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16 changes: 16 additions & 0 deletions llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -5671,6 +5671,14 @@ define i1 @test_is_shared_undef() nounwind {
ret i1 %val
}

define i1 @test_is_shared_poison() nounwind {
; CHECK-LABEL: @test_is_shared_poison(
; CHECK-NEXT: ret i1 poison
;
%val = call i1 @llvm.amdgcn.is.shared(ptr poison)
ret i1 %val
}

; --------------------------------------------------------------------
; llvm.amdgcn.is.private
; --------------------------------------------------------------------
Expand All @@ -5693,6 +5701,14 @@ define i1 @test_is_private_undef() nounwind {
ret i1 %val
}

define i1 @test_is_private_poison() nounwind {
; CHECK-LABEL: @test_is_private_poison(
; CHECK-NEXT: ret i1 poison
;
%val = call i1 @llvm.amdgcn.is.private(ptr poison)
ret i1 %val
}

; --------------------------------------------------------------------
; llvm.amdgcn.trig.preop
; --------------------------------------------------------------------
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