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[Bug middle-end/24095] New: use of garbage-collected memory with -ftree-vectorize
- From: "janis187 at us dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 27 Sep 2005 22:50:32 -0000
- Subject: [Bug middle-end/24095] New: use of garbage-collected memory with -ftree-vectorize
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
GCC mainline for powerpc-linux segfaults when compiling several of the
SPEC CPU2000 tests with "-ftree-vectorize -maltivec -mabi=altivec".
For most of them this happens with both -m32 and -m64.
The minimized test case (to be attached) causes the failure when
compiled with "-O2 -ftree-vectorize -maltivec --param ggc-min-expand=0
--param ggc-min-heapsize=0". The segfault is in fold_convert with
orig having the value 0xa5a5a5a5.
A reghunt identified the following patch from rth@gcc.gnu.org:
http://gcc.gnu.org/ml/gcc-cvs/2005-09/msg00635.html
This could be a latent bug, since on one of the systems I use regularly
I was not able to reproduce the failure.
--
Summary: use of garbage-collected memory with -ftree-vectorize
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: janis187 at us dot ibm dot com
CC: gcc-bugs at gcc dot gnu dot org,rth at gcc dot gnu dot
org
GCC target triplet: powerpc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24095