[Bug tree-optimization/39007] New: -ftree-loop-distribution ICEs
kazu at gcc dot gnu dot org
gcc-bugzilla@gcc.gnu.org
Wed Jan 28 19:56:00 GMT 2009
Consider:
void
foo (int *__restrict__ p, int *__restrict__ q, int count)
{
while (--count >= 0)
{
*p++ = 0;
*q++ = 0;
}
}
I get:
$ ./cc1 -quiet -O2 -ftree-loop-distribution min.c
min.c: In function 'foo':
min.c:2: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
This is as of Revision 143741, which is after the fix for PR
tree-optimization/38997 has gone in:
http://gcc.gnu.org/ml/gcc-cvs/2009-01/msg00752.html
FWIW, if I try:
void
foo (int *__restrict__ p, int *__restrict__ q, int count)
{
int i;
for (i = 0; i < count; i++)
{
*p++ = 0;
*q++ = 0;
}
}
I get:
*** glibc detected *** ./cc1: malloc(): memory corruption: 0xf7efd160 ***
I am guessing that depending on the exact memory allocation pattern,
different parts of memory get corrupted.
--
Summary: -ftree-loop-distribution ICEs
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: kazu at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39007
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