https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77937
--- Comment #10 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
It still happens, but on another unit this time:
markus@x4 ffmpeg % cat h264dsp.i
extern int fn2(int);
extern int fn3(int);
int a, b, c;
void fn1(long p1) {
char *d;
for (;; d += p1) {
d[0] = fn2(1 >> a);
fn3(0);
fn3(c >> a);
d[1] = fn3(d[1] * b + c >> a);
d[4] = fn3(d[4] * b + c >> a);
d[5] = fn3(d[5] * b + c >> a);
}
}
markus@x4 ffmpeg % gcc -march=amdfam10 -O3 -c -S h264dsp.i
h264dsp.i: In function ‘fn1’:
h264dsp.i:4:6: internal compiler error: in replace_one_candidate, at
gimple-ssa-strength-reduction.c:3369
void fn1(long p1) {
^~~
Simply building ffmpeg with -march=amdfam10 finds these bugs.
Please consider reverting your original patch until you come up with solution.
