diff options
| -rw-r--r-- | llvm/test/Transforms/InstCombine/fdiv.ll | 72 |
1 files changed, 44 insertions, 28 deletions
diff --git a/llvm/test/Transforms/InstCombine/fdiv.ll b/llvm/test/Transforms/InstCombine/fdiv.ll index 9a10c452335..b723ace318f 100644 --- a/llvm/test/Transforms/InstCombine/fdiv.ll +++ b/llvm/test/Transforms/InstCombine/fdiv.ll @@ -1,69 +1,85 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S -instcombine < %s | FileCheck %s -define float @test1(float %x) nounwind readnone ssp { +define float @test1(float %x) { +; CHECK-LABEL: @test1( +; CHECK-NEXT: [[DIV:%.*]] = fmul float [[X:%.*]], 0x47D0000000000000 +; CHECK-NEXT: ret float [[DIV]] +; %div = fdiv float %x, 0x3810000000000000 ret float %div - -; CHECK-LABEL: @test1( -; CHECK-NEXT: fmul float %x, 0x47D0000000000000 } -define float @test2(float %x) nounwind readnone ssp { +define float @test2(float %x) { +; CHECK-LABEL: @test2( +; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[X:%.*]], 0x47E0000000000000 +; CHECK-NEXT: ret float [[DIV]] +; %div = fdiv float %x, 0x47E0000000000000 ret float %div - -; CHECK-LABEL: @test2( -; CHECK-NEXT: fdiv float %x, 0x47E0000000000000 } -define float @test3(float %x) nounwind readnone ssp { +define float @test3(float %x) { +; CHECK-LABEL: @test3( +; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[X:%.*]], 0x36A0000000000000 +; CHECK-NEXT: ret float [[DIV]] +; %div = fdiv float %x, 0x36A0000000000000 ret float %div - -; CHECK-LABEL: @test3( -; CHECK-NEXT: fdiv float %x, 0x36A0000000000000 } -define float @test4(float %x) nounwind readnone ssp { +define float @test4(float %x) { +; CHECK-LABEL: @test4( +; CHECK-NEXT: [[DIV:%.*]] = fmul fast float [[X:%.*]], 1.250000e-01 +; CHECK-NEXT: ret float [[DIV]] +; %div = fdiv fast float %x, 8.0 ret float %div - -; CHECK-LABEL: @test4( -; CHECK-NEXT: fmul fast float %x, 1.250000e-01 } -define float @test5(float %x, float %y, float %z) nounwind readnone ssp { +define float @test5(float %x, float %y, float %z) { +; CHECK-LABEL: @test5( +; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[Y:%.*]], [[Z:%.*]] +; CHECK-NEXT: [[DIV2:%.*]] = fdiv fast float [[X:%.*]], [[TMP1]] +; CHECK-NEXT: ret float [[DIV2]] +; %div1 = fdiv fast float %x, %y %div2 = fdiv fast float %div1, %z ret float %div2 -; CHECK-LABEL: @test5( -; CHECK-NEXT: fmul fast -; CHECK-NEXT: fdiv fast } -define float @test6(float %x, float %y, float %z) nounwind readnone ssp { +define float @test6(float %x, float %y, float %z) { +; CHECK-LABEL: @test6( +; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[Z:%.*]], [[Y:%.*]] +; CHECK-NEXT: [[DIV2:%.*]] = fdiv fast float [[TMP1]], [[X:%.*]] +; CHECK-NEXT: ret float [[DIV2]] +; %div1 = fdiv fast float %x, %y %div2 = fdiv fast float %z, %div1 ret float %div2 -; CHECK-LABEL: @test6( -; CHECK-NEXT: fmul fast -; CHECK-NEXT: fdiv fast } -; CHECK-LABEL @fdiv_fneg_fneg( -; CHECK: %div = fdiv float %x, %y define float @fdiv_fneg_fneg(float %x, float %y) { +; CHECK-LABEL: @fdiv_fneg_fneg( +; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: ret float [[DIV]] +; %x.fneg = fsub float -0.0, %x %y.fneg = fsub float -0.0, %y %div = fdiv float %x.fneg, %y.fneg ret float %div } -; CHECK-LABEL @fdiv_fneg_fneg_fast( -; CHECK: %div = fdiv fast float %x, %y +; The test above shows that no FMF are needed, but show that we are not dropping FMF. + define float @fdiv_fneg_fneg_fast(float %x, float %y) { +; CHECK-LABEL: @fdiv_fneg_fneg_fast( +; CHECK-NEXT: [[DIV:%.*]] = fdiv fast float [[X:%.*]], [[Y:%.*]] +; CHECK-NEXT: ret float [[DIV]] +; %x.fneg = fsub float -0.0, %x %y.fneg = fsub float -0.0, %y %div = fdiv fast float %x.fneg, %y.fneg ret float %div } + |
