https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113817
Bug ID: 113817
Summary: ice in move_early_exit_stmts
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C code:
char enc_int_dst_orig;
long main_val;
char main_buf[20];
char *enc_int(char *dst, char *end, long value) {
while (value)
if (dst < end)
*dst++ = value >>= 7;
else
return &enc_int_dst_orig;
*dst = 7;
}
void main() { enc_int(main_buf, main_buf + sizeof(main_buf), main_val); }
compiles ok as follows:
$ /home/dcb38/gcc/results.20240202.asan.ubsan/bin/gcc -c -O3 -march=znver3
~/cvise/bug1005.c
$
But a few days later:
$ /home/dcb38/gcc/results.20240205.asan.ubsan/bin/gcc -c -O3 -march=znver3
~/cvise/bug1005.c
during GIMPLE pass: vect
/home/dcb38/cvise/bug1005.c: In function ‘main’:
/home/dcb38/cvise/bug1005.c:12:6: internal compiler error: Segmentation fault
12 | void main() { enc_int(main_buf, main_buf + sizeof(main_buf), main_val);
}
| ^~~~
0xed44e9 crash_signal(int)
/home/dcb38/gcc/working/gcc/../../trunk.20210101/gcc/toplev.cc:317
0x1186bd3 gsi_prev(gimple_stmt_iterator*)
../../trunk.20210101/gcc/gimple-iterator.h:236
0x1186bd3 move_early_exit_stmts(_loop_vec_info*)
/home/dcb38/gcc/working/gcc/../../trunk.20210101/gcc/tree-vect-loop.cc:1
1804
$ /home/dcb38/gcc/results.20240202.asan.ubsan/bin/gcc -v 2>&1 | grep exp
gcc version 14.0.1 20240202 (experimental) (639bd5e9b759a6d7)
$ /home/dcb38/gcc/results.20240205.asan.ubsan/bin/gcc -v 2>&1 | grep exp
gcc version 14.0.1 20240205 (experimental) (5b281946c4b51132)
The git range is 40 commits.
