File: 2002-05-21-PHIElimination.ll

package info (click to toggle)
llvm-toolchain-6.0 1%3A6.0.1-10
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 598,080 kB
  • sloc: cpp: 3,046,253; ansic: 595,057; asm: 271,965; python: 128,926; objc: 106,554; sh: 21,906; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,227; cs: 2,027; xml: 686; php: 212; csh: 117
file content (19 lines) | stat: -rw-r--r-- 414 bytes parent folder | download | duplicates (22) 
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 -simplifycfg | 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
}