File: 2004-03-13-InstCombineInfLoop.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (13 lines) | stat: -rw-r--r-- 504 bytes parent folder | download | duplicates (28) 
1
2
3
4
5
6
7
8
9
10
11
12
13
 
; This testcase caused the combiner to go into an infinite loop, moving the 
; cast back and forth, changing the seteq to operate on int vs uint and back.

; RUN: opt < %s -instcombine -disable-output

define i1 @test(i32 %A, i32 %B) {
        %C = sub i32 0, %A              ; <i32> [#uses=1]
        %Cc = bitcast i32 %C to i32             ; <i32> [#uses=1]
        %D = sub i32 0, %B              ; <i32> [#uses=1]
        %E = icmp eq i32 %Cc, %D                ; <i1> [#uses=1]
        ret i1 %E
}