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
32
33
34
35
36
37
38
39
|
; RUN: opt < %s -passes=licm -S | FileCheck %s
@b = external global i32, align 4
@fn3.i = external global i32, align 4
declare i32 @g() nounwind
define i32 @f() {
entry:
br label %for.cond
for.cond: ; preds = %for.end, %entry
; CHECK-LABEL: for.cond:
; CHECK: store i32 0, ptr @b
store i32 0, ptr @b, align 4
br i1 true, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %for.cond
br label %for.body
for.body: ; preds = %for.body, %for.body.preheader
%g.15 = phi i32 [ undef, %for.body ], [ 0, %for.body.preheader ]
%0 = load i32, ptr @fn3.i, align 4
%call = call i32 @g()
br i1 false, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %for.cond
%whatever = phi i32 [ %call, %for.end.loopexit ], [ undef, %for.cond ]
br i1 false, label %for.cond, label %if.then
if.then: ; preds = %for.end
; CHECK-LABEL: if.then:
; CHECK: phi i32 [ {{.*}}, %for.end ]
; CHECK-NOT: store i32 0, ptr @b
; CHECK: ret i32
ret i32 %whatever
}
|
