test/Transforms/InstCombine/sqrt-nofast.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=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, ptr %x.addr, align 4
  store float %y, ptr %y.addr, align 4
  %0 = load float, ptr %x.addr, align 4
  %1 = load float, ptr %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

; The call below is to a function called "sqrtf", but its type is double.
; Assume it is a user function rather than a libm function, and so don't
; transform it.

define double @fake_sqrt(double %a, double %b) {
; CHECK-LABEL: @fake_sqrt(
; CHECK-NEXT:    [[C:%.*]] = fmul fast double [[A:%.*]], [[A]]
; CHECK-NEXT:    [[E:%.*]] = call fast double @sqrtf(double [[C]]) #[[ATTR1:[0-9]+]]
; CHECK-NEXT:    ret double [[E]]
;
  %c = fmul fast double %a, %a
  %e = call fast double @sqrtf(double %c) readnone
  ret double %e
}

; Standard sqrtf takes and returns float.  The following is not it.
declare double @sqrtf(double) readnone