1; RUN: opt -loop-unroll -disable-output < %s
2; PR11361
3
4; This tests for an iterator invalidation issue.
5
6target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
7target triple = "x86_64-unknown-linux-gnu"
8
9define void @func_1() nounwind uwtable {
10entry:
11  br label %for.cond8.preheader
12
13for.cond8.preheader:                              ; preds = %for.inc15, %entry
14  %l_1264.04 = phi i32 [ 0, %entry ], [ %add.i, %for.inc15 ]
15  %l_1330.0.03 = phi i80 [ undef, %entry ], [ %ins.lcssa, %for.inc15 ]
16  br label %for.body9
17
18for.body9:                                        ; preds = %for.body9, %for.cond8.preheader
19  %l_1330.0.12 = phi i80 [ %l_1330.0.03, %for.cond8.preheader ], [ %ins, %for.body9 ]
20  %storemerge1 = phi i32 [ 7, %for.cond8.preheader ], [ %sub, %for.body9 ]
21  %tmp = lshr i80 %l_1330.0.12, 8
22  %tmp1 = trunc i80 %tmp to i8
23  %inc12 = add i8 %tmp1, 1
24  %tmp2 = zext i8 %inc12 to i80
25  %tmp3 = shl nuw nsw i80 %tmp2, 8
26  %mask = and i80 %l_1330.0.12, -65281
27  %ins = or i80 %tmp3, %mask
28  %sub = add nsw i32 %storemerge1, -1
29  %tobool = icmp eq i32 %sub, 0
30  br i1 %tobool, label %for.inc15, label %for.body9
31
32for.inc15:                                        ; preds = %for.body9
33  %ins.lcssa = phi i80 [ %ins, %for.body9 ]
34  %sext = shl i32 %l_1264.04, 24
35  %conv.i = ashr exact i32 %sext, 24
36  %add.i = add nsw i32 %conv.i, 1
37  %cmp = icmp slt i32 %add.i, 3
38  br i1 %cmp, label %for.cond8.preheader, label %for.end16
39
40for.end16:                                        ; preds = %for.inc15
41  ret void
42}
43