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https://github.com/c64scene-ar/llvm-6502.git
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bc43fe1efe
Applied the patch, rather than committing it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168656 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
797 B
LLVM
36 lines
797 B
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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;; x * 0 ==> 0 when no-nans and no-signed-zero
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; CHECK: mul_zero_1
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define float @mul_zero_1(float %a) {
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%b = fmul nsz nnan float %a, 0.0
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; CHECK: ret float 0.0
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ret float %b
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}
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; CHECK: mul_zero_2
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define float @mul_zero_2(float %a) {
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%b = fmul fast float 0.0, %a
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; CHECK: ret float 0.0
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ret float %b
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}
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;; x * 0 =/=> 0 when there could be nans or -0
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; CHECK: no_mul_zero_1
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define float @no_mul_zero_1(float %a) {
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%b = fmul nsz float %a, 0.0
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; CHECK: ret float %b
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ret float %b
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}
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; CHECK: no_mul_zero_2
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define float @no_mul_zero_2(float %a) {
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%b = fmul nnan float %a, 0.0
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; CHECK: ret float %b
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ret float %b
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}
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; CHECK: no_mul_zero_3
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define float @no_mul_zero_3(float %a) {
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%b = fmul float %a, 0.0
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; CHECK: ret float %b
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ret float %b
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}
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