https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68830
Bug ID: 68830
Summary: internal compiler error: in tree_ssa_phiopt_worker, at
tree-ssa-phiopt.c:322
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: regehr at cs dot utah.edu
Target Milestone: ---
ICE on valid code
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/john/gcc-install/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/home/john/gcc-install
--enable-languages=c,c++
Thread model: posix
gcc version 6.0.0 20151208 (experimental) (GCC)
$ cat small.c
long a;
unsigned short b;
int c;
void fn1() {
long d;
int e[5][7];
e[1][3] = 1;
for (;;)
if (d) {
char f = c = 1;
for (; c <= 4; c++) {
a = 0;
for (;; a++) {
if (e[c][a + 1])
break;
b &= f;
e[c][a] = 0;
}
}
}
}
$ gcc -O3 -c small.c
small.c: In function ‘fn1’:
small.c:4:6: internal compiler error: in tree_ssa_phiopt_worker, at
tree-ssa-phiopt.c:322
void fn1() {
^~~
0xc8390e tree_ssa_phiopt_worker
../../gcc/tree-ssa-phiopt.c:322
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.
john@tis-HP-Z440-Workstation:~/test/reduce_crash_325170$
