[PATCH] D115669: AMDGPU: Combine is.shared/is.private of null/undef
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Dec 13 13:17:15 PST 2021
arsenm created this revision.
arsenm added a reviewer: rampitec.
Herald added subscribers: foad, kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.
https://reviews.llvm.org/D115669
Files:
llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
Index: llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
===================================================================
--- llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
+++ llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
@@ -3922,3 +3922,47 @@
store <4 x float> %res, <4 x float> addrspace(1)* %out
ret void
}
+
+; --------------------------------------------------------------------
+; llvm.amdgcn.is.shared
+; --------------------------------------------------------------------
+
+declare i1 @llvm.amdgcn.is.shared(i8*) nounwind readnone
+
+define i1 @test_is_shared_null() nounwind {
+; CHECK-LABEL: @test_is_shared_null(
+; CHECK-NEXT: ret i1 false
+;
+ %val = call i1 @llvm.amdgcn.is.shared(i8* null)
+ ret i1 %val
+}
+
+define i1 @test_is_shared_undef() nounwind {
+; CHECK-LABEL: @test_is_shared_undef(
+; CHECK-NEXT: ret i1 undef
+;
+ %val = call i1 @llvm.amdgcn.is.shared(i8* undef)
+ ret i1 %val
+}
+
+; --------------------------------------------------------------------
+; llvm.amdgcn.is.private
+; --------------------------------------------------------------------
+
+declare i1 @llvm.amdgcn.is.private(i8*) nounwind readnone
+
+define i1 @test_is_private_null() nounwind {
+; CHECK-LABEL: @test_is_private_null(
+; CHECK-NEXT: ret i1 false
+;
+ %val = call i1 @llvm.amdgcn.is.private(i8* null)
+ ret i1 %val
+}
+
+define i1 @test_is_private_undef() nounwind {
+; CHECK-LABEL: @test_is_private_undef(
+; CHECK-NEXT: ret i1 undef
+;
+ %val = call i1 @llvm.amdgcn.is.private(i8* undef)
+ ret i1 %val
+}
Index: llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
@@ -892,6 +892,15 @@
}
break;
}
+ case Intrinsic::amdgcn_is_shared:
+ case Intrinsic::amdgcn_is_private: {
+ if (isa<UndefValue>(II.getArgOperand(0)))
+ return IC.replaceInstUsesWith(II, UndefValue::get(II.getType()));
+
+ if (isa<ConstantPointerNull>(II.getArgOperand(0)))
+ return IC.replaceInstUsesWith(II, ConstantInt::getFalse(II.getType()));
+ break;
+ }
default: {
if (const AMDGPU::ImageDimIntrinsicInfo *ImageDimIntr =
AMDGPU::getImageDimIntrinsicInfo(II.getIntrinsicID())) {
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