forked from OSchip/llvm-project
41 lines
1.1 KiB
LLVM
41 lines
1.1 KiB
LLVM
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; RUN: opt < %s -reassociate -S | FileCheck %s
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define float @test1(float %A) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[X:%.*]] = fadd float %A, 1.000000e+00
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; CHECK-NEXT: [[Y:%.*]] = fadd float %A, 1.000000e+00
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; CHECK-NEXT: [[R:%.*]] = fsub float [[X]], [[Y]]
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; CHECK-NEXT: ret float [[R]]
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;
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%X = fadd float %A, 1.000000e+00
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%Y = fadd float %A, 1.000000e+00
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%r = fsub float %X, %Y
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ret float %r
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}
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define float @test2(float %A) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%X = fadd fast float 1.000000e+00, %A
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%Y = fadd fast float 1.000000e+00, %A
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%r = fsub fast float %X, %Y
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ret float %r
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}
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; Check again using minimal subset of FMF.
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define float @test2_reassoc(float %A) {
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; CHECK-LABEL: @test2_reassoc(
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; CHECK-NEXT: [[X:%.*]] = fadd reassoc float %A, 1.000000e+00
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; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float %A, 1.000000e+00
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; CHECK-NEXT: [[R:%.*]] = fsub reassoc float [[X]], [[Y]]
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; CHECK-NEXT: ret float [[R]]
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;
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%X = fadd reassoc float 1.000000e+00, %A
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%Y = fadd reassoc float 1.000000e+00, %A
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%r = fsub reassoc float %X, %Y
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ret float %r
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}
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