The C compiler crashes while compilation of a simple test program with
optimizaion -O2 and above.
The bug seems to be triggered by unrolling a loop which contains a "?" operator
inside an array index.
The crash occured on the gcc versions shipped with SuSE 10.2 (GNU C version
4.1.2 20061115 (prerelease) (SUSE Linux) (i586-suse-linux) ) and Ubuntu 6.10
(gcc (GCC) 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5) )
Here is the output from SuSE:
[EMAIL PROTECTED]:~/projects/gcc-crash> gcc -v -save-temps -O2 -o gcc-crash
gcc-crash.c
Using built-in specs.
Target: i586-suse-linux
Configured with: ../configure --enable-threads=posix --prefix=/usr
--with-local-prefix=/usr/local --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib --libexecdir=/usr/lib
--enable-languages=c,c++,objc,fortran,obj-c++,java,ada
--enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.1.2
--enable-ssp --disable-libssp --disable-libgcj --with-slibdir=/lib
--with-system-zlib --enable-shared --enable-__cxa_atexit
--enable-libstdcxx-allocator=new --program-suffix=-4.1
--enable-version-specific-runtime-libs --without-system-libunwind
--with-cpu=generic --host=i586-suse-linux
Thread model: posix
gcc version 4.1.2 20061115 (prerelease) (SUSE Linux)
/usr/lib/gcc/i586-suse-linux/4.1.2/cc1 -E -quiet -v gcc-crash.c -mtune=generic
-O2 -fpch-preprocess -o gcc-crash.i
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc/i586-suse-linux/4.1.2/include
/usr/lib/gcc/i586-suse-linux/4.1.2/../../../../i586-suse-linux/include
/usr/include
End of search list.
/usr/lib/gcc/i586-suse-linux/4.1.2/cc1 -fpreprocessed gcc-crash.i -quiet
-dumpbase gcc-crash.c -mtune=generic -auxbase gcc-crash -O2 -version -o
gcc-crash.s
GNU C version 4.1.2 20061115 (prerelease) (SUSE Linux) (i586-suse-linux)
compiled by GNU C version 4.1.2 20061115 (prerelease) (SUSE Linux).
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=64527
Compiler executable checksum: 56c778b1bb718636fb229d3eaf03526e
gcc-crash.c: In function \u2018test_crash\u2019:
gcc-crash.c:4: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.opensuse.org> for instructions.
--
Summary: C Compiler crash on loop optimization
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: suehring at hhi dot de
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30212
