forked from OSchip/llvm-project
28 lines
594 B
LLVM
28 lines
594 B
LLVM
; RUN: opt -S < %s -newgvn | FileCheck %s
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declare void @llvm.sideeffect()
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; Store-to-load forwarding across a @llvm.sideeffect.
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; CHECK-LABEL: s2l
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; CHECK-NOT: load
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define float @s2l(float* %p) {
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store float 0.0, float* %p
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call void @llvm.sideeffect()
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%t = load float, float* %p
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ret float %t
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}
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; Redundant load elimination across a @llvm.sideeffect.
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; CHECK-LABEL: rle
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; CHECK: load
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; CHECK-NOT: load
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define float @rle(float* %p) {
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%r = load float, float* %p
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call void @llvm.sideeffect()
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%s = load float, float* %p
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%t = fadd float %r, %s
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ret float %t
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}
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