https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82000
Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-08-28
Ever confirmed|0 |1
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
The example you wrote in the bug report makes no sense: missing includes, and
with the includes added it optimizes to return 0. Downloading the one from
godbolt, we simplify it to:
int main() ()
{
struct string_view D.32298;
long unsigned int _15;
<bb 2> [14.44%] [count: INV]:
_15 = __builtin_strlen (&internal_buffer);
MEM[(struct string_view *)&D.32298] = _15;
MEM[(struct string_view *)&D.32298 + 8B] = &internal_buffer;
__asm__ __volatile__("" : : "i,r,m" D.32298 : "memory");
return 0;
}
Indeed we don't seem to manage folding strlen there. I think there is a DUP
asking to transform the buffer into STRING_CST or something like that.
(btw, why do you use "g" for clang and not for gcc?)
