1; REQUIRES: asserts
2; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll -unroll-runtime -unroll-peel-multi-deopt-exit 2>&1 | FileCheck %s
3; RUN: opt < %s -S -debug-only=loop-unroll -unroll-peel-multi-deopt-exit -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s
4
5; Regression test for setting the correct idom for exit blocks.
6
7; CHECK: Loop Unroll: F[basic]
8; CHECK: PEELING loop %for.body with iteration count 2!
9
10define i32 @basic(i32* %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 {
11entry:
12  br label %for.body
13
14for.body:
15  %i.05 = phi i32 [ 0, %entry ], [ %inc, %latch ]
16  %p.addr.04 = phi i32* [ %p, %entry ], [ %incdec.ptr, %latch ]
17  %incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1
18  store i32 %i.05, i32* %p.addr.04, align 4
19  %inc = add nsw i32 %i.05, 1
20  %cmp = icmp slt i32 %inc, %k
21  br i1 %c1, label %left, label %right
22
23left:
24  br label %latch
25
26right:
27  br i1 %c1, label %latch, label %side_exit, !prof !2
28
29latch:
30  br i1 %cmp, label %for.body, label %for.end, !prof !1
31
32for.end:
33  ret i32 %inc
34
35side_exit:
36  %rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]
37  ret i32 %rval
38}
39
40declare i32 @llvm.experimental.deoptimize.i32(...)
41
42attributes #0 = { nounwind }
43
44!1 = !{!"branch_weights", i32 1, i32 1}
45!2 = !{!"branch_weights", i32 1, i32 0}
46!3 = !{!"function_entry_count", i64 1}
47