1; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
2target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
3target triple = "x86_64-apple-macosx10.7.0"
4
5; rdar://12801584
6; Value of %shouldExit can be changed by RunInMode.
7; Make sure we do not replace load %shouldExit in while.cond.backedge
8; with a phi node where the value from while.body is 0.
9define i32 @test() nounwind ssp {
10entry:
11; CHECK: test()
12; CHECK: while.body:
13; CHECK: call void @RunInMode
14; CHECK: br i1 %tobool, label %while.cond.backedge, label %if.then
15; CHECK: while.cond.backedge:
16; CHECK: load i32, i32* %shouldExit
17; CHECK: br i1 %cmp, label %while.body
18  %shouldExit = alloca i32, align 4
19  %tasksIdle = alloca i32, align 4
20  store i32 0, i32* %shouldExit, align 4
21  store i32 0, i32* %tasksIdle, align 4
22  call void @CTestInitialize(i32* %tasksIdle) nounwind
23  %0 = load i32, i32* %shouldExit, align 4
24  %cmp1 = icmp eq i32 %0, 0
25  br i1 %cmp1, label %while.body.lr.ph, label %while.end
26
27while.body.lr.ph:
28  br label %while.body
29
30while.body:
31  call void @RunInMode(i32 100) nounwind
32  %1 = load i32, i32* %tasksIdle, align 4
33  %tobool = icmp eq i32 %1, 0
34  br i1 %tobool, label %while.cond.backedge, label %if.then
35
36if.then:
37  store i32 0, i32* %tasksIdle, align 4
38  call void @TimerCreate(i32* %shouldExit) nounwind
39  br label %while.cond.backedge
40
41while.cond.backedge:
42  %2 = load i32, i32* %shouldExit, align 4
43  %cmp = icmp eq i32 %2, 0
44  br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
45
46while.cond.while.end_crit_edge:
47  br label %while.end
48
49while.end:
50  ret i32 0
51}
52declare void @CTestInitialize(i32*)
53declare void @RunInMode(i32)
54declare void @TimerCreate(i32*)
55