1; RUN: opt %loadPolly -polly-optree -analyze < %s | FileCheck %s -match-full-lines
2
3; In the code below, %0 is known to be equal to the content of @c (constant 0).
4; Thus, in order to save a scalar dependency, forward-optree replaces
5; the use of %0 in Stmt_lor_end93 by a load from @c by changing the
6; access find from a scalar access to a array accesses.
7; llvm.org/PR48034 decribes a crash caused by the mid-processing change.
8
9target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
10target triple = "x86_64-unknown-linux-gnu"
11
12@c = external dso_local global i64, align 8
13
14define void @func()  {
15entry:
16  br label %lor.end
17
18while.cond.loopexit:
19  %conv102.le = trunc i64 %xor101 to i8
20  ret void
21
22lor.end:
23  %tobool72.not = icmp eq i64 0, 0
24  br i1 %tobool72.not, label %lor.rhs87, label %lor.end.thread
25
26lor.end.thread:
27  br label %lor.rhs87
28
29lor.rhs87:
30  %0 = phi i64 [ 0, %lor.end.thread ], [ 0, %lor.end ]
31  store i64 %0, i64* @c, align 8
32  %neg79 = xor i64 %0, -1
33  br label %lor.end93
34
35lor.end93:
36  %tobool93 = icmp ne i64 undef, 0
37  %conv95 = zext i1 %tobool93 to i64
38  %and100 = and i64 %conv95, undef
39  %xor101 = xor i64 %and100, %neg79
40  %xor103 = xor i64 %0, %conv95
41  br label %while.cond.loopexit
42}
43
44
45; CHECK: Statistics {
46; CHECK:     Reloads: 1
47; CHECK: }
48
49; CHECK: After statements {
50; CHECK:     Stmt_lor_end93
51; CHECK-NEXT:        ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
52; CHECK-NEXT:            { Stmt_lor_end93[] -> MemRef3[] };
53; CHECK-NEXT:       new: { Stmt_lor_end93[] -> MemRef_c[0] };
54; CHECK: }
55