File: 2009-03-13-PHIElimBug.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 (28 lines) | stat: -rw-r--r-- 728 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
24
25
26
27
28
; RUN: llvm-as < %s | llc -march=x86 | grep -A 2 {call.*f} | grep movl
; Check the register copy comes after the call to f and before the call to g
; PR3784

declare i32 @f()

declare i32 @g()

define i32 @phi() {
entry:
	%a = call i32 @f()		; <i32> [#uses=1]
	%b = invoke i32 @g()
			to label %cont unwind label %lpad		; <i32> [#uses=1]

cont:		; preds = %entry
	%x = phi i32 [ %b, %entry ]		; <i32> [#uses=0]
	%aa = call i32 @g()		; <i32> [#uses=1]
	%bb = invoke i32 @g()
			to label %cont2 unwind label %lpad		; <i32> [#uses=1]

cont2:		; preds = %cont
	%xx = phi i32 [ %bb, %cont ]		; <i32> [#uses=1]
	ret i32 %xx

lpad:		; preds = %cont, %entry
	%y = phi i32 [ %a, %entry ], [ %aa, %cont ]		; <i32> [#uses=1]
	ret i32 %y
}