File: PhiBlockMerge.ll

package info (click to toggle)
llvm 2.2-12
  • links: PTS, VCS
  • area: main
  • in suites: lenny
  • size: 38,648 kB
  • ctags: 28,258
  • sloc: cpp: 215,479; sh: 12,132; ansic: 10,002; yacc: 5,525; perl: 2,352; ml: 1,580; makefile: 956; pascal: 718; lex: 602; exp: 320; ada: 193; lisp: 160; csh: 116; objc: 59; python: 59; tcl: 20
file content (23 lines) | stat: -rw-r--r-- 423 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
; Test merging of blocks that only have PHI nodes in them
;
; RUN: llvm-upgrade < %s | llvm-as | opt -simplifycfg | llvm-dis | not grep N:
;

int %test(bool %a, bool %b) {
        br bool %a, label %M, label %O

O:
	br bool %b, label %N, label %Q
Q:
	br label %N
N:
	%Wp = phi int [0, %O], [1, %Q]
	; This block should be foldable into M
	br label %M

M:
	%W = phi int [%Wp, %N], [2, %0]
	%R = add int %W, 1
	ret int %R
}