File: 2002-05-21-PHIElimination.ll

package info (click to toggle)
llvm 2.6-9.1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 57,604 kB
  • ctags: 44,336
  • sloc: cpp: 344,766; sh: 12,407; ansic: 10,617; ada: 3,070; ml: 2,505; perl: 2,496; makefile: 1,426; pascal: 1,163; exp: 389; asm: 307; python: 298; objc: 260; lisp: 182; csh: 117; xml: 38; f90: 36; tcl: 20
file content (19 lines) | stat: -rw-r--r-- 424 bytes parent folder | download 
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: llvm-as < %s | opt -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
}