1; RUN: opt < %s -basicaa -licm -S | FileCheck %s
2@b = external global i32, align 4
3@fn3.i = external global i32, align 4
4
5declare i32 @g() nounwind
6
7define i32 @f() {
8entry:
9  br label %for.cond
10
11for.cond:                                         ; preds = %for.end, %entry
12; CHECK-LABEL: for.cond:
13; CHECK: store i32 0, i32* @b
14  store i32 0, i32* @b, align 4
15  br i1 true, label %for.body.preheader, label %for.end
16
17for.body.preheader:                               ; preds = %for.cond
18  br label %for.body
19
20for.body:                                         ; preds = %for.body, %for.body.preheader
21  %g.15 = phi i32 [ undef, %for.body ], [ 0, %for.body.preheader ]
22  %arrayidx2 = getelementptr inbounds i32, i32* @fn3.i, i64 0
23  %0 = load i32, i32* %arrayidx2, align 4
24  %call = call i32 @g()
25  br i1 false, label %for.body, label %for.end.loopexit
26
27for.end.loopexit:                                 ; preds = %for.body
28  br label %for.end
29
30for.end:                                          ; preds = %for.end.loopexit, %for.cond
31  %whatever = phi i32 [ %call, %for.end.loopexit ], [ undef, %for.cond ]
32  br i1 false, label %for.cond, label %if.then
33
34if.then:                                          ; preds = %for.end
35; CHECK-LABEL: if.then:
36; CHECK: phi i32 [ {{.*}}, %for.end ]
37; CHECK-NOT: store i32 0, i32* @b
38; CHECK: ret i32
39  ret i32 %whatever
40}
41