File: 2002-05-21-PHIElimination.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-23
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 1,800,648 kB
  • sloc: cpp: 6,428,647; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,888; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (19 lines) | stat: -rw-r--r-- 465 bytes parent folder | download | duplicates (16) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
; CFG Simplification is making a loop dead, then changing the add into:
;
;   %V1 = add int %V1, 1
;
; Which is not valid SSA
;
; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 | llvm-dis

define void @test() {
; <label>:0
	br i1 true, label %end, label %Loop
Loop:		; preds = %Loop, %0
	%V = phi i32 [ 0, %0 ], [ %V1, %Loop ]		; <i32> [#uses=1]
	%V1 = add i32 %V, 1		; <i32> [#uses=1]
	br label %Loop
end:		; preds = %0
	ret void
}