44 lines
2.0 KiB
LLVM
44 lines
2.0 KiB
LLVM
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; RUN: opt -S --amdgpu-annotate-uniform < %s | FileCheck -check-prefix=OPT %s
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target datalayout = "A5"
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; "load vaddr" depends on the store, so we should not mark vaddr as amdgpu.noclobber.
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; OPT-LABEL: @store_clobbers_load(
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; OPT: %vaddr = getelementptr <4 x i32>, <4 x i32> addrspace(1)* %input, i64 0, !amdgpu.uniform !0
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; OPT-NEXT: %zero = load <4 x i32>, <4 x i32> addrspace(1)* %vaddr, align 16
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define amdgpu_kernel void @store_clobbers_load( < 4 x i32> addrspace(1)* %input, i32 addrspace(1)* %out, i32 %index) {
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entry:
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%addr0 = bitcast <4 x i32> addrspace(1)* %input to i32 addrspace(1)*
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store i32 0, i32 addrspace(1)* %addr0
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%vaddr = getelementptr <4 x i32>, <4 x i32> addrspace(1)* %input, i64 0
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%zero = load <4 x i32>, <4 x i32> addrspace(1)* %vaddr, align 16
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%one = insertelement <4 x i32> %zero, i32 1, i32 1
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%two = insertelement <4 x i32> %one, i32 2, i32 2
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%three = insertelement <4 x i32> %two, i32 3, i32 3
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store <4 x i32> %three, <4 x i32> addrspace(1)* %input, align 16
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%rslt = extractelement <4 x i32> %three, i32 %index
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store i32 %rslt, i32 addrspace(1)* %out, align 4
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x()
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@lds0 = addrspace(3) global [512 x i32] undef, align 4
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; To check that %arrayidx0 is not marked as amdgpu.noclobber.
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; OPT-LABEL: @atomicrmw_clobbers_load(
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; OPT: %arrayidx0 = getelementptr inbounds [512 x i32], [512 x i32] addrspace(3)* @lds0, i32 0, i32 %idx.0, !amdgpu.uniform !0
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; OPT-NEXT: %val = atomicrmw xchg i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
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define amdgpu_kernel void @atomicrmw_clobbers_load(i32 addrspace(1)* %out0, i32 addrspace(1)* %out1) {
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%tid.x = tail call i32 @llvm.amdgcn.workitem.id.x() #1
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%idx.0 = add nsw i32 %tid.x, 2
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%arrayidx0 = getelementptr inbounds [512 x i32], [512 x i32] addrspace(3)* @lds0, i32 0, i32 %idx.0
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%val = atomicrmw xchg i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
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%load = load i32, i32 addrspace(3)* %arrayidx0, align 4
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store i32 %val, i32 addrspace(1)* %out0, align 4
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store i32 %load, i32 addrspace(1)* %out1, align 4
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ret void
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}
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