forked from OSchip/llvm-project
70 lines
1.7 KiB
LLVM
70 lines
1.7 KiB
LLVM
; RUN: opt -S -instcombine < %s | FileCheck %s
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define float @test1(float %x) nounwind readnone ssp {
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%div = fdiv float %x, 0x3810000000000000
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ret float %div
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: fmul float %x, 0x47D0000000000000
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}
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define float @test2(float %x) nounwind readnone ssp {
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%div = fdiv float %x, 0x47E0000000000000
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ret float %div
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: fdiv float %x, 0x47E0000000000000
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}
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define float @test3(float %x) nounwind readnone ssp {
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%div = fdiv float %x, 0x36A0000000000000
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ret float %div
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: fdiv float %x, 0x36A0000000000000
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}
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define float @test4(float %x) nounwind readnone ssp {
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%div = fdiv fast float %x, 8.0
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ret float %div
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: fmul fast float %x, 1.250000e-01
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}
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define float @test5(float %x, float %y, float %z) nounwind readnone ssp {
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%div1 = fdiv fast float %x, %y
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%div2 = fdiv fast float %div1, %z
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ret float %div2
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: fmul fast
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; CHECK-NEXT: fdiv fast
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}
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define float @test6(float %x, float %y, float %z) nounwind readnone ssp {
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%div1 = fdiv fast float %x, %y
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%div2 = fdiv fast float %z, %div1
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ret float %div2
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: fmul fast
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; CHECK-NEXT: fdiv fast
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}
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; CHECK-LABEL @fdiv_fneg_fneg(
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; CHECK: %div = fdiv float %x, %y
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define float @fdiv_fneg_fneg(float %x, float %y) {
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%x.fneg = fsub float -0.0, %x
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%y.fneg = fsub float -0.0, %y
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%div = fdiv float %x.fneg, %y.fneg
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ret float %div
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}
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; CHECK-LABEL @fdiv_fneg_fneg_fast(
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; CHECK: %div = fdiv fast float %x, %y
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define float @fdiv_fneg_fneg_fast(float %x, float %y) {
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%x.fneg = fsub float -0.0, %x
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%y.fneg = fsub float -0.0, %y
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%div = fdiv fast float %x.fneg, %y.fneg
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ret float %div
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}
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