| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| ; Check that we skip transformations if the attribute unsafe-fp-math |
| ; is not set. |
| |
| define float @mysqrt(float %x, float %y) #0 { |
| ; CHECK-LABEL: @mysqrt( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[MUL:%.*]] = fmul fast float [[X:%.*]], [[X]] |
| ; CHECK-NEXT: [[TMP0:%.*]] = call float @llvm.sqrt.f32(float [[MUL]]) |
| ; CHECK-NEXT: ret float [[TMP0]] |
| ; |
| entry: |
| %x.addr = alloca float, align 4 |
| %y.addr = alloca float, align 4 |
| store float %x, float* %x.addr, align 4 |
| store float %y, float* %y.addr, align 4 |
| %0 = load float, float* %x.addr, align 4 |
| %1 = load float, float* %x.addr, align 4 |
| %mul = fmul fast float %0, %1 |
| %2 = call float @llvm.sqrt.f32(float %mul) |
| ret float %2 |
| } |
| |
| declare float @llvm.sqrt.f32(float) #1 |
| |
| ; FIXME: |
| ; This is a function called "sqrtf", but its type is double. |
| ; Assume it is a user function rather than a libm function, |
| ; so don't transform it. |
| |
| define double @fake_sqrt(double %a, double %b) { |
| ; CHECK-LABEL: @fake_sqrt( |
| ; CHECK-NEXT: [[FABS:%.*]] = call fast double @llvm.fabs.f64(double [[A:%.*]]) |
| ; CHECK-NEXT: ret double [[FABS]] |
| ; |
| %c = fmul fast double %a, %a |
| %e = call fast double @sqrtf(double %c) readnone |
| ret double %e |
| } |
| |
| declare double @sqrtf(double) readnone ; This is not the 'sqrt' you're looking for. |