1; RUN: opt < %s -loop-unroll -S | FileCheck %s
2
3
4; This should not unroll since the address of the loop header is taken.
5
6; CHECK-LABEL: @test1(
7; CHECK: store i8* blockaddress(@test1, %l1), i8** %P
8; CHECK: l1:
9; CHECK-NEXT: phi i32
10; rdar://8287027
11define i32 @test1(i8** %P) nounwind ssp {
12entry:
13  store i8* blockaddress(@test1, %l1), i8** %P
14  br label %l1
15
16l1:                                               ; preds = %l1, %entry
17  %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
18  %inc = add nsw i32 %x.0, 1
19  %exitcond = icmp eq i32 %inc, 3
20  br i1 %exitcond, label %l2, label %l1
21
22l2:                                               ; preds = %l1
23  ret i32 0
24}
25
26; This should not unroll since the call is 'noduplicate'.
27
28; CHECK-LABEL: @test2(
29define i32 @test2(i8** %P) nounwind ssp {
30entry:
31  br label %l1
32
33l1:                                               ; preds = %l1, %entry
34  %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
35; CHECK: call void @f()
36; CHECK-NOT: call void @f()
37  call void @f() noduplicate
38  %inc = add nsw i32 %x.0, 1
39  %exitcond = icmp eq i32 %inc, 3
40  br i1 %exitcond, label %l2, label %l1
41
42l2:                                               ; preds = %l1
43  ret i32 0
44; CHECK: }
45}
46
47declare void @f()
48