https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106922
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
So there's a similar missed optimization but it's not caused by the bisected
revision. The situation is like
float bar, baz;
void foo (int *p, int n)
{
*p = 0;
do
{
bar = 1.;
if (*p)
{
baz = 2.;
*p = 0;
}
}
while (--n);
}
where we fail to realize that in the first if (*p), *p stays zero. I have
a patch that fixes the above but that miscompiles genrecog.cc
merge_into_decision (but no testcase in the testsuite ...).
