| ; RUN: opt -S -instcombine < %s | FileCheck %s |
| |
| define float @test1(float %x) nounwind readnone ssp { |
| %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 { |
| %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 { |
| %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 { |
| %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 { |
| %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 { |
| %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) { |
| %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 |
| define float @fdiv_fneg_fneg_fast(float %x, float %y) { |
| %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 |
| } |