[Bug other/27851] New: Hour-long segfault with -O1 -g on gcc.dg/parm-impl-decl-1.c

["flash at pobox dot com" <gcc-bugzilla at gcc dot gnu dot org>]

The code below causes a checking=yes build of GCC 4.1.1 to report "Internal
error: Segmentation fault (program cc1)" after more than an hour.  (Ninety
minutes in the session below; sixty-eight minutes the first time, on a faster
and less loaded machine.)  Likewise a checking=all build of GCC 4.1.0.  A
checking=all build of GCC 4.0.2 completes without error in a fifth of a second.

foo (int __attribute__ ((__mode__ (vector_size(8)))) i) /* { dg-warning
"warning: '__mode__' attribute ignored" } */
{
}
h (int (*p)[sizeof(i())])
{
}

The above code is Delta-reduced from the test suite file
gcc/testsuite/gcc.dg/parm-impl-decl-1.c.
This sounds reminiscent of bug 18239 or bug 16873, but those are supposedly
fixed.

============================
Here are sessions; I'll attach the preprocessed file.

First session, -O1, crash:

8> time /opt/gcc411/bin/gcc -O1 -g -c
../cpp/bugfiles/GCC_bugfiles/error/131357_parm-impl-decl-1_min.c
../cpp/bugfiles/GCC_bugfiles/error/131357_parm-impl-decl-1_min.c:1: warning:
?__mode__? attribute ignored
gcc: Internal error: Segmentation fault (program cc1)
Please submit a full bug report.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

real    89m59.067s
user    44m27.227s
sys     0m4.422s



Second session, no optimization, -v -save-temps, no crash:

10> /opt/gcc411/bin/gcc -v -save-temps -O0 -g -c
../cpp/bugfiles/GCC_bugfiles/error/131357_parm-impl-decl-1_min.cUsing built-in
specs.
Target: i686-pc-linux-gnu
Configured with: /third-party_source/gcc-4.1.1/configure --enable-checking=yes
--prefix=/opt/gcc411 --enable-languages=c,c++ --with-comment=PalmSource
checking=yes build by Flash Sheridan 5/31/06 on Kondal
Thread model: posix
gcc version 4.1.1
 /home/opt/gcc411/bin/../libexec/gcc/i686-pc-linux-gnu/4.1.1/cc1 -E -quiet -v
-iprefix /home/opt/gcc411/bin/../lib/gcc/i686-pc-linux-gnu/4.1.1/
../cpp/bugfiles/GCC_bugfiles/error/131357_parm-impl-decl-1_min.c
-mtune=pentiumpro -fworking-directory -O0 -fpch-preprocess -o
131357_parm-impl-decl-1_min.i
ignoring nonexistent directory
"/home/opt/gcc411/bin/../lib/gcc/i686-pc-linux-gnu/4.1.1/../../../../i686-pc-linux-gnu/include"
ignoring duplicate directory
"/opt/gcc411/lib/gcc/i686-pc-linux-gnu/4.1.1/include"
ignoring nonexistent directory
"/opt/gcc411/lib/gcc/i686-pc-linux-gnu/4.1.1/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/opt/gcc411/bin/../lib/gcc/i686-pc-linux-gnu/4.1.1/include
 /usr/local/include
 /opt/gcc411/include
 /usr/include
End of search list.
 /home/opt/gcc411/bin/../libexec/gcc/i686-pc-linux-gnu/4.1.1/cc1 -fpreprocessed
131357_parm-impl-decl-1_min.i -quiet -dumpbase 131357_parm-impl-decl-1_min.c
-mtune=pentiumpro -auxbase 131357_parm-impl-decl-1_min -g -O0 -version -o
131357_parm-impl-decl-1_min.s
GNU C version 4.1.1 (i686-pc-linux-gnu)
        compiled by GNU C version 3.3.5 (Debian 1:3.3.5-8ubuntu2).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: e8d2a74fbd215574b08a58c63cf2b2c4
../cpp/bugfiles/GCC_bugfiles/error/131357_parm-impl-decl-1_min.c:1: warning:
?__mode__? attribute ignored
 as -V -Qy -o 131357_parm-impl-decl-1_min.o 131357_parm-impl-decl-1_min.s
GNU assembler version 2.15 (i386-linux) using BFD version 2.15
---
PalmSource bug 131357


-- 
           Summary: Hour-long segfault with -O1 -g on gcc.dg/parm-impl-decl-
                    1.c
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: flash at pobox dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27851