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37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S < %s -passes=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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define float @s2l(ptr %p) {
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; CHECK-LABEL: define float @s2l(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: store float 0.000000e+00, ptr [[P]], align 4
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; CHECK-NEXT: call void @llvm.sideeffect()
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; CHECK-NEXT: ret float 0.000000e+00
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;
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store float 0.0, ptr %p
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call void @llvm.sideeffect()
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%t = load float, ptr %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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define float @rle(ptr %p) {
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; CHECK-LABEL: define float @rle(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[R:%.*]] = load float, ptr [[P]], align 4
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; CHECK-NEXT: call void @llvm.sideeffect()
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; CHECK-NEXT: [[T:%.*]] = fadd float [[R]], [[R]]
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; CHECK-NEXT: ret float [[T]]
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;
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%r = load float, ptr %p
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call void @llvm.sideeffect()
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%s = load float, ptr %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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