https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82140
Bug ID: 82140
Summary: "internal compiler error: Illegal instruction" on
function exp
Product: gcc
Version: 4.8.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: rocky.wu at emc dot com
Target Milestone: ---
$ cat b.c
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
int main()
{
double a=4 * exp(-0.5);
printf("a=%f\n",a);
exit(0);
}
$ /auto/home/lsbuild/desktop-573285/usr/bin/gcc -Wall -Wextra
-fno-strict-aliasing -fwrapv b.c -o a.out -lm
b.c: In function ‘main’:
b.c:7:3: internal compiler error: Illegal instruction
double a=4 * exp(-0.5);
^
0x7d5d0f crash_signal
../../gcc-4.8.3-20140911/gcc/toplev.c:335
0x2b6b80b0163f ???
/rpmbuild/BUILD/glibc-2.17-c758a686/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
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.
The bug is not reproducible, so it is likely a hardware or OS problem.
$ /auto/home/lsbuild/desktop-573285/usr/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/auto/home/lsbuild/desktop-573285/usr/bin/gcc
COLLECT_LTO_WRAPPER=/auto/toolset_nfs/toolchain/desktop-573285/usr/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.3/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.8.3-20140911/configure
--prefix=/auto/home/lsbuild/desktop-573285/usr
--libdir=/auto/home/lsbuild/desktop-573285/usr/lib64
--libexecdir=/auto/home/lsbuild/desktop-573285/usr/libexec
--with-build-time-tools=/auto/home/lsbuild/desktop-573285/usr/bin
--with-as=/auto/home/lsbuild/desktop-573285/usr/bin/as
--with-ld=/auto/home/lsbuild/desktop-573285/usr/bin/ld
--with-libelf-include=/auto/home/lsbuild/desktop-573285/usr/include
--with-libelf-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-native-system-header-dir=/auto/home/lsbuild/desktop-573285/usr/include
--enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-c99
--enable-long-long --enable-clocale=gnu --enable-languages=c,c++
--enable-multilib --disable-libgcj --disable-libquadmath
--disable-libunwind-exceptions --with-system-zlib
--with-gmp-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-gmp-include=/auto/home/lsbuild/desktop-573285/usr/include
--with-mpfr-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-mpfr-include=/auto/home/lsbuild/desktop-573285/usr/include
--with-mpc-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-mpc-include=/auto/home/lsbuild/desktop-573285/usr/include
Thread model: posix
gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC)
seems only exp function cause this problem, the gcc behavior is normal if no
exp() called.
$ cat c.c
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
int main()
{
double a=4 * sqrt(2.0);
printf("a=%f\n",a);
exit(0);
}
$ /auto/home/lsbuild/desktop-573285/usr/bin/gcc -Wall -Wextra
-fno-strict-aliasing -fwrapv c.c -o a.out -lm
$ ./a.out
a=5.656854
