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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2017-10-13 21:10:22 +0000 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2017-10-13 21:10:22 +0000 |
| commit | e11d8aca77dcdd17a8a25bdf84f0e13d57e53d41 (patch) | |
| tree | 84ac8959676371349d6635df3c0b2dbafb839d37 /llvm/test/CodeGen/AMDGPU/fneg.ll | |
| parent | 868783e85557dde30923fab94c7ffabf5e271818 (diff) | |
| download | bcm5719-llvm-e11d8aca77dcdd17a8a25bdf84f0e13d57e53d41.tar.gz bcm5719-llvm-e11d8aca77dcdd17a8a25bdf84f0e13d57e53d41.zip | |
AMDGPU: Implement hasBitPreservingFPLogic
llvm-svn: 315754
Diffstat (limited to 'llvm/test/CodeGen/AMDGPU/fneg.ll')
| -rw-r--r-- | llvm/test/CodeGen/AMDGPU/fneg.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/fneg.ll b/llvm/test/CodeGen/AMDGPU/fneg.ll index d1eabfb13c9..94ec61622bd 100644 --- a/llvm/test/CodeGen/AMDGPU/fneg.ll +++ b/llvm/test/CodeGen/AMDGPU/fneg.ll @@ -84,3 +84,15 @@ define amdgpu_kernel void @fneg_fold_f32(float addrspace(1)* %out, float %in) { store float %fmul, float addrspace(1)* %out ret void } + +; Make sure we turn some integer operations back into fabs +; FUNC-LABEL: {{^}}bitpreserve_fneg_f32: +; GCN: v_mul_f32_e64 v{{[0-9]+}}, s{{[0-9]+}}, -4.0 +define amdgpu_kernel void @bitpreserve_fneg_f32(float addrspace(1)* %out, float %in) { + %in.bc = bitcast float %in to i32 + %int.abs = xor i32 %in.bc, 2147483648 + %bc = bitcast i32 %int.abs to float + %fadd = fmul float %bc, 4.0 + store float %fadd, float addrspace(1)* %out + ret void +} |
