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; 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)
; 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) #0
; CHECK-NEXT: %sqrtrecip = fdiv fast double 1.000000e+00, %sqrt
; CHECK-NEXT: ret double %sqrtrecip
declare double @llvm.pow.f64(double, double)
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