1; RUN: opt -basic-aa -tbaa -loop-unroll-and-jam -allow-unroll-and-jam -unroll-and-jam-count=4 -unroll-remainder < %s -S | FileCheck %s
2;
3; Check that followup attributes are set in the new loops.
4;
5target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
6
7define void @followup(i32 %I, i32 %J, i32* noalias nocapture %A, i32* noalias nocapture readonly %B) {
8entry:
9  %cmp = icmp ne i32 %J, 0
10  %cmp122 = icmp ne i32 %I, 0
11  %or.cond = and i1 %cmp, %cmp122
12  br i1 %or.cond, label %for.outer.preheader, label %for.end
13
14for.outer.preheader:
15  br label %for.outer
16
17for.outer:
18  %i.us = phi i32 [ %add8.us, %for.latch ], [ 0, %for.outer.preheader ]
19  br label %for.inner
20
21for.inner:
22  %j.us = phi i32 [ 0, %for.outer ], [ %inc.us, %for.inner ]
23  %sum1.us = phi i32 [ 0, %for.outer ], [ %add.us, %for.inner ]
24  %arrayidx.us = getelementptr inbounds i32, i32* %B, i32 %j.us
25  %0 = load i32, i32* %arrayidx.us, align 4
26  %add.us = add i32 %0, %sum1.us
27  %inc.us = add nuw i32 %j.us, 1
28  %exitcond = icmp eq i32 %inc.us, %J
29  br i1 %exitcond, label %for.latch, label %for.inner
30
31for.latch:
32  %add.us.lcssa = phi i32 [ %add.us, %for.inner ]
33  %arrayidx6.us = getelementptr inbounds i32, i32* %A, i32 %i.us
34  store i32 %add.us.lcssa, i32* %arrayidx6.us, align 4
35  %add8.us = add nuw i32 %i.us, 1
36  %exitcond25 = icmp eq i32 %add8.us, %I
37  br i1 %exitcond25, label %for.end.loopexit, label %for.outer, !llvm.loop !0
38
39for.end.loopexit:
40  br label %for.end
41
42for.end:
43  ret void
44}
45
46!0 = !{!0, !1, !2, !3, !4, !6}
47!1 = !{!"llvm.loop.unroll_and_jam.enable"}
48!2 = !{!"llvm.loop.unroll_and_jam.followup_outer", !{!"FollowupOuter"}}
49!3 = !{!"llvm.loop.unroll_and_jam.followup_inner", !{!"FollowupInner"}}
50!4 = !{!"llvm.loop.unroll_and_jam.followup_all", !{!"FollowupAll"}}
51!6 = !{!"llvm.loop.unroll_and_jam.followup_remainder_inner", !{!"FollowupRemainderInner"}}
52
53
54; CHECK: br i1 %exitcond.3, label %for.latch, label %for.inner, !llvm.loop ![[LOOP_INNER:[0-9]+]]
55; CHECK: br i1 %niter.ncmp.3, label %for.end.loopexit.unr-lcssa.loopexit, label %for.outer, !llvm.loop ![[LOOP_OUTER:[0-9]+]]
56; CHECK: br i1 %exitcond.epil, label %for.latch.epil, label %for.inner.epil, !llvm.loop ![[LOOP_REMAINDER_INNER:[0-9]+]]
57; CHECK: br i1 %exitcond.epil.1, label %for.latch.epil.1, label %for.inner.epil.1, !llvm.loop ![[LOOP_REMAINDER_INNER]]
58; CHECK: br i1 %exitcond.epil.2, label %for.latch.epil.2, label %for.inner.epil.2, !llvm.loop ![[LOOP_REMAINDER_INNER]]
59
60; CHECK: ![[LOOP_INNER]] = distinct !{![[LOOP_INNER]], ![[FOLLOWUP_ALL:[0-9]+]], ![[FOLLOWUP_INNER:[0-9]+]]}
61; CHECK: ![[FOLLOWUP_ALL]] = !{!"FollowupAll"}
62; CHECK: ![[FOLLOWUP_INNER]] = !{!"FollowupInner"}
63; CHECK: ![[LOOP_OUTER]] = distinct !{![[LOOP_OUTER]], ![[FOLLOWUP_ALL]], ![[FOLLOWUP_OUTER:[0-9]+]]}
64; CHECK: ![[FOLLOWUP_OUTER]] = !{!"FollowupOuter"}
65; CHECK: ![[LOOP_REMAINDER_INNER]] = distinct !{![[LOOP_REMAINDER_INNER]], ![[FOLLOWUP_ALL]], ![[FOLLOWUP_REMAINDER_INNER:[0-9]+]]}
66; CHECK: ![[FOLLOWUP_REMAINDER_INNER]] = !{!"FollowupRemainderInner"}
67