33 lines
1.2 KiB
LLVM
33 lines
1.2 KiB
LLVM
; RUN: opt -mtriple amdgcn-unknown-amdhsa -analyze -divergence -use-gpu-divergence-analysis %s | FileCheck %s
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; CHECK: for function 'readfirstlane':
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define amdgpu_kernel void @readfirstlane() {
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%id.x = call i32 @llvm.amdgcn.workitem.id.x()
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; CHECK: DIVERGENT: %id.x = call i32 @llvm.amdgcn.workitem.id.x()
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%first.lane = call i32 @llvm.amdgcn.readfirstlane(i32 %id.x)
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; CHECK-NOT: DIVERGENT: %first.lane = call i32 @llvm.amdgcn.readfirstlane(i32 %id.x)
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ret void
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}
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; CHECK: for function 'icmp':
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define amdgpu_kernel void @icmp(i32 inreg %x) {
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; CHECK-NOT: DIVERGENT: %icmp = call i64 @llvm.amdgcn.icmp.i32
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%icmp = call i64 @llvm.amdgcn.icmp.i32(i32 %x, i32 0, i32 33)
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ret void
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}
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; CHECK: for function 'fcmp':
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define amdgpu_kernel void @fcmp(float inreg %x, float inreg %y) {
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; CHECK-NOT: DIVERGENT: %fcmp = call i64 @llvm.amdgcn.fcmp.i32
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%fcmp = call i64 @llvm.amdgcn.fcmp.i32(float %x, float %y, i32 33)
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x() #0
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declare i32 @llvm.amdgcn.readfirstlane(i32) #0
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declare i64 @llvm.amdgcn.icmp.i32(i32, i32, i32) #1
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declare i64 @llvm.amdgcn.fcmp.i32(float, float, i32) #1
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind readnone convergent }
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