1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -instcombine -S | FileCheck %s
3
4; Check that we skip transformations if the attribute unsafe-fp-math
5; is not set.
6
7define float @mysqrt(float %x, float %y) #0 {
8; CHECK-LABEL: @mysqrt(
9; CHECK-NEXT:  entry:
10; CHECK-NEXT:    [[MUL:%.*]] = fmul fast float [[X:%.*]], [[X]]
11; CHECK-NEXT:    [[TMP0:%.*]] = call float @llvm.sqrt.f32(float [[MUL]])
12; CHECK-NEXT:    ret float [[TMP0]]
13;
14entry:
15  %x.addr = alloca float, align 4
16  %y.addr = alloca float, align 4
17  store float %x, float* %x.addr, align 4
18  store float %y, float* %y.addr, align 4
19  %0 = load float, float* %x.addr, align 4
20  %1 = load float, float* %x.addr, align 4
21  %mul = fmul fast float %0, %1
22  %2 = call float @llvm.sqrt.f32(float %mul)
23  ret float %2
24}
25
26declare float @llvm.sqrt.f32(float) #1
27
28; FIXME:
29; This is a function called "sqrtf", but its type is double.
30; Assume it is a user function rather than a libm function,
31; so don't transform it.
32
33define double @fake_sqrt(double %a, double %b) {
34; CHECK-LABEL: @fake_sqrt(
35; CHECK-NEXT:    [[FABS:%.*]] = call fast double @llvm.fabs.f64(double [[A:%.*]])
36; CHECK-NEXT:    ret double [[FABS]]
37;
38  %c = fmul fast double %a, %a
39  %e = call fast double @sqrtf(double %c) readnone
40  ret double %e
41}
42
43declare double @sqrtf(double) readnone ; This is not the 'sqrt' you're looking for.
44