File: 2004-03-13-InstCombineInfLoop.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
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
}