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view test/Transforms/InstCombine/pow-sqrt.ll @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 7d135dc70f03
children 3a76565eade5
line wrap: on
line source

; RUN: opt < %s -instcombine -S | FileCheck %s

define double @pow_half(double %x) {
  %pow = call fast double @llvm.pow.f64(double %x, double 5.000000e-01)
  ret double %pow
}

; CHECK-LABEL: define double @pow_half(
; CHECK-NEXT:  %sqrt = call fast double @sqrt(double %x) #1
; CHECK-NEXT:  ret double %sqrt

define double @pow_neghalf(double %x) {
  %pow = call fast double @llvm.pow.f64(double %x, double -5.000000e-01)
  ret double %pow
}

; CHECK-LABEL: define double @pow_neghalf(
; CHECK-NEXT: %sqrt = call fast double @sqrt(double %x) #1
; CHECK-NEXT: %sqrtrecip = fdiv fast double 1.000000e+00, %sqrt
; CHECK-NEXT: ret double %sqrtrecip

declare double @llvm.pow.f64(double, double) #0

attributes #0 = { nounwind readnone speculatable }
attributes #1 = { nounwind readnone }