File: sink-alloca.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 (31 lines) | stat: -rw-r--r-- 1,167 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
29
30
31
; RUN: llvm-as < %s | opt -indvars | llvm-dis | FileCheck %s
; PR4775

; Indvars shouldn't sink the alloca out of the entry block, even though
; it's not used until after the loop.

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin10.0"

@llvm.used = appending global [1 x i8*] [i8* bitcast (i32 ()* @main to i8*)],
section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]

define i32 @main() nounwind {
; CHECK: entry:
; CHECK-NEXT: %result.i = alloca i32, align 4
entry:
  %result.i = alloca i32, align 4                 ; <i32*> [#uses=2]
  br label %while.cond

while.cond:                                       ; preds = %while.cond, %entry
  %call = call i32 @bar() nounwind                ; <i32> [#uses=1]
  %tobool = icmp eq i32 %call, 0                  ; <i1> [#uses=1]
  br i1 %tobool, label %while.end, label %while.cond

while.end:                                        ; preds = %while.cond
  volatile store i32 0, i32* %result.i
  %tmp.i = volatile load i32* %result.i           ; <i32> [#uses=0]
  ret i32 0
}

declare i32 @bar()