https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64809
Bug ID: 64809
Summary: ICE at -O3 with -g enabled on x86_64-linux-gnu (in
32-bit mode)
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Created attachment 34586
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34586&action=edit
reduced test case
The attached code causes an ICE when compiled with the current gcc trunk at -O3
with -g enabled on x86_64-linux-gnu in the 32-bit mode (but not in 64-bit
mode).
This test has been very tough to reduce; the attached (with 6130 bytes) is the
best I was able to get so far.
This is a regression from 4.9.x.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/usr/local/gcc-trunk
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 5.0.0 20150126 (experimental) [trunk revision 220102] (GCC)
$
$ rm -f ./a.out
$ gcc-4.9 -m32 -O3 -g small.c >/dev/null 2>&1
$ ls ./a.out
./a.out
$ rm -f ./a.out
$ gcc-trunk -m32 -O3 small.c >/dev/null 2>&1
$ ls ./a.out
./a.out
$ rm -f ./a.out
$
$
$ gcc-trunk -m32 -O3 -g small.c > out.txt 2>&1
$ tail -n 16 out.txt
small.c: In function ‘main’:
small.c:348:1: internal compiler error: Segmentation fault
main ()
^
0xa85e5f crash_signal
../../gcc-trunk/gcc/toplev.c:383
0x6afd5b reorder_operands
../../gcc-trunk/gcc/cfgexpand.c:5031
0x6bc971 expand_gimple_basic_block
../../gcc-trunk/gcc/cfgexpand.c:5091
0x6bdd77 execute
../../gcc-trunk/gcc/cfgexpand.c:6003
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
