1; RUN: opt < %s -loop-unroll -S | FileCheck %s
2; RUN: opt < %s -passes='require<opt-remark-emit>,loop-unroll' -S | FileCheck %s
3
4
5; This should not unroll since the address of the loop header is taken.
6
7; CHECK-LABEL: @test1(
8; CHECK: store i8* blockaddress(@test1, %l1), i8** %P
9; CHECK: l1:
10; CHECK-NEXT: phi i32
11; rdar://8287027
12define i32 @test1(i8** %P) nounwind ssp {
13entry:
14  store i8* blockaddress(@test1, %l1), i8** %P
15  br label %l1
16
17l1:                                               ; preds = %l1, %entry
18  %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
19  %inc = add nsw i32 %x.0, 1
20  %exitcond = icmp eq i32 %inc, 3
21  br i1 %exitcond, label %l2, label %l1
22
23l2:                                               ; preds = %l1
24  ret i32 0
25}
26
27; This should not unroll since the call is 'noduplicate'.
28
29; CHECK-LABEL: @test2(
30define i32 @test2(i8** %P) nounwind ssp {
31entry:
32  br label %l1
33
34l1:                                               ; preds = %l1, %entry
35  %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
36; CHECK: call void @f()
37; CHECK-NOT: call void @f()
38  call void @f() noduplicate
39  %inc = add nsw i32 %x.0, 1
40  %exitcond = icmp eq i32 %inc, 3
41  br i1 %exitcond, label %l2, label %l1
42
43l2:                                               ; preds = %l1
44  ret i32 0
45; CHECK: }
46}
47
48declare void @f()
49