File: 2004-03-13-InstCombineInfLoop.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (13 lines) | stat: -rw-r--r-- 511 bytes parent folder | download | duplicates (13)
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 -passes=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
}