File: fold-sqrt-sqrtf.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,696 kB
  • sloc: cpp: 7,438,781; ansic: 1,393,871; asm: 1,012,926; python: 241,771; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 8,596; ml: 5,082; perl: 4,730; makefile: 3,591; awk: 3,523; javascript: 2,251; xml: 892; fortran: 672
file content (17 lines) | stat: -rw-r--r-- 590 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
; RUN: opt -passes=instcombine -S -disable-simplify-libcalls < %s | FileCheck %s
; rdar://10466410

; Instcombine tries to fold (fptrunc (sqrt (fpext x))) -> (sqrtf x), but this
; shouldn't fold when sqrtf isn't available.
define float @foo(float %f) uwtable ssp {
entry:
; CHECK: %conv = fpext float %f to double
; CHECK: %call = tail call double @sqrt(double %conv)
; CHECK: %conv1 = fptrunc double %call to float
  %conv = fpext float %f to double
  %call = tail call double @sqrt(double %conv)
  %conv1 = fptrunc double %call to float
  ret float %conv1
}

declare double @sqrt(double)