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From: "kretz at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/56918] New: incorrect auto-vectorization of array initialization
Date: Thu, 11 Apr 2013 11:04:00 -0000 [thread overview]
Message-ID: <bug-56918-4@http.gcc.gnu.org/bugzilla/> (raw)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56918
Bug #: 56918
Summary: incorrect auto-vectorization of array initialization
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: kretz@kde.org
Compile the following testcase with "gcc -m32 -O2 -ftree-vectorize -msse2"
int main() {
double data[4];
for (int i = 0; i < 2 * 2; ++i) {
data[i] = ((i + 2) % 3) + 1;
}
if (data[0] != 3.) {
return 1;
}
return 0;
}
The first for-loop calculates the values 6, 7, 8, 9 instead of the expected 3,
1, 2, 3.
next reply other threads:[~2013-04-11 11:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-11 11:04 kretz at kde dot org [this message]
2013-04-11 11:42 ` [Bug tree-optimization/56918] [4.8 Regression] " rguenth at gcc dot gnu.org
2013-04-11 11:59 ` rguenth at gcc dot gnu.org
2013-04-11 14:43 ` jakub at gcc dot gnu.org
2013-04-11 15:20 ` jakub at gcc dot gnu.org
2013-04-12 9:13 ` jakub at gcc dot gnu.org
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