1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
| ; 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.
|