1; RUN: opt -loop-versioning -S < %s | FileCheck %s
2
3; Make sure all PHIs are properly updated in the exit block.  Based on
4; PR28037.
5
6target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
7target triple = "x86_64-unknown-linux-gnu"
8
9@x = external global [2 x [3 x [5 x i16]]]
10
11; CHECK-LABEL: @phi_with_undef
12define void @phi_with_undef() {
13bb6.lr.ph:                                        ; preds = %bb5.preheader
14  br label %bb6
15
16bb6:                                              ; preds = %bb6.lr.ph, %bb6
17  %_tmp1423 = phi i64 [ undef, %bb6.lr.ph ], [ %_tmp142, %bb6 ]
18  %_tmp123 = getelementptr [2 x [3 x [5 x i16]]], [2 x [3 x [5 x i16]]]* @x, i16 0, i64 undef
19  %_tmp126 = getelementptr [3 x [5 x i16]], [3 x [5 x i16]]* %_tmp123, i16 0, i64 %_tmp1423
20  %_tmp129 = getelementptr [5 x i16], [5 x i16]* %_tmp126, i16 0, i64 undef
21  %_tmp130 = load i16, i16* %_tmp129
22  store i16 undef, i16* getelementptr ([2 x [3 x [5 x i16]]], [2 x [3 x [5 x i16]]]* @x, i64 0, i64 undef, i64 undef, i64 undef)
23  %_tmp142 = add i64 %_tmp1423, 1
24  br i1 false, label %bb6, label %loop.exit
25
26loop.exit:                                ; preds = %bb6
27  %_tmp142.lcssa = phi i64 [ %_tmp142, %bb6 ]
28  %split = phi i16 [ undef, %bb6 ]
29; CHECK: %split = phi i16 [ undef, %bb6 ], [ undef, %bb6.lver.orig ]
30  br label %bb9
31
32bb9:                                              ; preds = %bb9.loopexit, %bb1
33  ret void
34}
35
36; CHECK-LABEL: @phi_with_non_loop_defined_value
37define void @phi_with_non_loop_defined_value() {
38bb6.lr.ph:                                        ; preds = %bb5.preheader
39  %t = add i16 1, 1
40  br label %bb6
41
42bb6:                                              ; preds = %bb6.lr.ph, %bb6
43  %_tmp1423 = phi i64 [ undef, %bb6.lr.ph ], [ %_tmp142, %bb6 ]
44  %_tmp123 = getelementptr [2 x [3 x [5 x i16]]], [2 x [3 x [5 x i16]]]* @x, i16 0, i64 undef
45  %_tmp126 = getelementptr [3 x [5 x i16]], [3 x [5 x i16]]* %_tmp123, i16 0, i64 %_tmp1423
46  %_tmp129 = getelementptr [5 x i16], [5 x i16]* %_tmp126, i16 0, i64 undef
47  %_tmp130 = load i16, i16* %_tmp129
48  store i16 undef, i16* getelementptr ([2 x [3 x [5 x i16]]], [2 x [3 x [5 x i16]]]* @x, i64 0, i64 undef, i64 undef, i64 undef)
49  %_tmp142 = add i64 %_tmp1423, 1
50  br i1 false, label %bb6, label %loop.exit
51
52loop.exit:                                ; preds = %bb6
53  %_tmp142.lcssa = phi i64 [ %_tmp142, %bb6 ]
54  %split = phi i16 [ %t, %bb6 ]
55; CHECK: %split = phi i16 [ %t, %bb6 ], [ %t, %bb6.lver.orig ]
56  br label %bb9
57
58bb9:                                              ; preds = %bb9.loopexit, %bb1
59  ret void
60}
61