https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381
Bug ID: 63381
Summary: Wrong constant folding
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ishiura-compiler at ml dot kwansei.ac.jp
GCC 5.0.0 for x86_64 miscompiles the following code.
$ cat test.c
int a = 0, b = 0, c = 0, d, e;
int
main (void)
{
d = ((20 % (1 != b)) && c) + 2147483647;
e = 20 % (a >= 0);
return 0;
}
$ x86_64-unknown-linux-gnu-gcc-5.0.0 test.c -Os
$ ./a.out
Floating point exception (core dumped)
$ x86_64-unknown-linux-gnu-gcc-5.0.0 -v
Using built-in specs.
COLLECT_GCC=x86_64-unknown-linux-gnu-gcc-5.0.0
COLLECT_LTO_WRAPPER=/usr/local/x86_64-tools/gcc-
5.0.0/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/orange3/gcc-master/configure --
prefix=/usr/local/x86_64-tools/gcc-5.0.0/ --with-gmp=/usr/local/gmp-
5.1.1/ --with-mpfr=/usr/local/mpfr-3.1.2/ --with-mpc=/usr/local/mpc-
1.0.1/ --disable-multilib --disable-nls --enable-languages=c
Thread model: posix
gcc version 5.0.0 20140922 (experimental) (GCC)
