21 lines
651 B
LLVM
21 lines
651 B
LLVM
; RUN: llc -march=amdgcn -mcpu=gfx900 -amdgpu-atomic-optimizations=true < %s | FileCheck %s
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; RUN: llc -march=amdgcn -mcpu=gfx900 -amdgpu-atomic-optimizations=true < %s -use-gpu-divergence-analysis | FileCheck %s
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@local = addrspace(3) global i32 undef
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define amdgpu_kernel void @reducible(i32 %x) {
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; CHECK-LABEL: reducible:
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; CHECK-NOT: dpp
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entry:
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br label %loop
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loop:
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%i = phi i32 [ 0, %entry ], [ %i1, %loop ]
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%gep = getelementptr i32, ptr addrspace(3) @local, i32 %i
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%cond = icmp ult i32 %i, %x
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%i1 = add i32 %i, 1
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br i1 %cond, label %loop, label %exit
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exit:
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%old = atomicrmw add ptr addrspace(3) %gep, i32 %x acq_rel
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ret void
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}
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