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* [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize
@ 2014-08-08 8:05 zeccav at gmail dot com
2014-09-04 10:19 ` [Bug tree-optimization/62058] " mpolacek at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: zeccav at gmail dot com @ 2014-08-08 8:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058
Bug ID: 62058
Summary: Undefined behaviour in tree-data-ref.c with options
-O1 -ftree-loop-vectorize
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
/* from testsuite p60183.c */
/* gcc 4.9.1 -S -O1 -ftree-loop-vectorize */
/* ../../gcc-4.9.1/gcc/tree-data-ref.c:2423:16: runtime error: signed integer
overflow: 65536 * -65536 cannot be represented in type 'int' */
/* ../../gcc-4.9.1/gcc/tree-data-ref.c:2334:38: runtime error: signed integer
overflow: 1073741824 + 1073741824 cannot be represented in type 'int' */
/* ../../gcc-4.9.1/gcc/tree-data-ref.c:2425:16: runtime error: negation of
-2147483648 (INT_MIN) cannot be represented in type 'int'; cast to an unsigned
type to negate this value to itself */
/* ../../gcc-4.9.1/gcc/tree-data-ref.c:2424:16: runtime error: negation of
-2147483648 (INT_MIN) cannot be represented in type 'int'; cast to an unsigned
type to negate this value to itself */
/* on x86-64 from testsuite pr60183.c */
unsigned char c[0x30001] = { 1 };
int j = 0; /* independent of the j initialization value */
static void
foo (unsigned long *x, unsigned char *y)
{
int i;
unsigned long w = x[0];
for (i = 0; i < j; i++)
{
w += *y;
y += 0x10000;
w += *y;
}
x[1] = w;
}
void
bar (unsigned long *x)
{
foo (x, c);
}
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com @ 2014-09-04 10:19 ` mpolacek at gcc dot gnu.org 2014-10-30 10:42 ` jakub at gcc dot gnu.org ` (5 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-09-04 10:19 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2014-09-04 Target Milestone|--- |4.9.2 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- $ ./xgcc -B./ -c o.c -O -ftree-loop-vectorize /home/polacek/src/gcc/gcc/tree-data-ref.c:2440:16: runtime error: signed integer overflow: 65536 * -65536 cannot be represented in type 'int' /home/polacek/src/gcc/gcc/tree-data-ref.c:2351:38: runtime error: signed integer overflow: 1073741824 + 1073741824 cannot be represented in type 'int' /home/polacek/src/gcc/gcc/tree-data-ref.c:2442:16: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself /home/polacek/src/gcc/gcc/tree-data-ref.c:2441:16: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself Confirmed. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com 2014-09-04 10:19 ` [Bug tree-optimization/62058] " mpolacek at gcc dot gnu.org @ 2014-10-30 10:42 ` jakub at gcc dot gnu.org 2015-06-26 20:07 ` jakub at gcc dot gnu.org ` (4 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2014-10-30 10:42 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.9.2 |4.9.3 --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- GCC 4.9.2 has been released. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com 2014-09-04 10:19 ` [Bug tree-optimization/62058] " mpolacek at gcc dot gnu.org 2014-10-30 10:42 ` jakub at gcc dot gnu.org @ 2015-06-26 20:07 ` jakub at gcc dot gnu.org 2015-06-26 20:35 ` jakub at gcc dot gnu.org ` (3 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2015-06-26 20:07 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- GCC 4.9.3 has been released. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com ` (2 preceding siblings ...) 2015-06-26 20:07 ` jakub at gcc dot gnu.org @ 2015-06-26 20:35 ` jakub at gcc dot gnu.org 2015-06-26 21:20 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2015-06-26 20:35 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.9.3 |4.9.4 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com ` (3 preceding siblings ...) 2015-06-26 20:35 ` jakub at gcc dot gnu.org @ 2015-06-26 21:20 ` pinskia at gcc dot gnu.org 2015-08-24 12:12 ` zeccav at gmail dot com 2021-02-27 9:34 ` zeccav at gmail dot com 6 siblings, 0 replies; 8+ messages in thread From: pinskia at gcc dot gnu.org @ 2015-06-26 21:20 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.9.4 |--- ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com ` (4 preceding siblings ...) 2015-06-26 21:20 ` pinskia at gcc dot gnu.org @ 2015-08-24 12:12 ` zeccav at gmail dot com 2021-02-27 9:34 ` zeccav at gmail dot com 6 siblings, 0 replies; 8+ messages in thread From: zeccav at gmail dot com @ 2015-08-24 12:12 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 --- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> --- Still there in GCC 5.2.0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/62058] Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com ` (5 preceding siblings ...) 2015-08-24 12:12 ` zeccav at gmail dot com @ 2021-02-27 9:34 ` zeccav at gmail dot com 6 siblings, 0 replies; 8+ messages in thread From: zeccav at gmail dot com @ 2021-02-27 9:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62058 Vittorio Zecca <zeccav at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|NEW |RESOLVED --- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> --- Fixed in current runk. ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-02-27 9:34 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-08-08 8:05 [Bug c/62058] New: Undefined behaviour in tree-data-ref.c with options -O1 -ftree-loop-vectorize zeccav at gmail dot com 2014-09-04 10:19 ` [Bug tree-optimization/62058] " mpolacek at gcc dot gnu.org 2014-10-30 10:42 ` jakub at gcc dot gnu.org 2015-06-26 20:07 ` jakub at gcc dot gnu.org 2015-06-26 20:35 ` jakub at gcc dot gnu.org 2015-06-26 21:20 ` pinskia at gcc dot gnu.org 2015-08-24 12:12 ` zeccav at gmail dot com 2021-02-27 9:34 ` zeccav at gmail dot com
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