https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101353
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Keywords| |easyhack,
| |missed-optimization
Last reconfirmed| |2021-07-06
Status|UNCONFIRMED |NEW
Version|unknown |12.0
Ever confirmed|0 |1
Component|c++ |tree-optimization
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
void placement_call ()
{
<bb 2> [local count: 1073741824]:
MEM[(struct T *)&buffer] = factory (42); [return slot optimization]
return;
}
Most likely because the gimple level detection of tail calls does not handle
RSO based function calls with global data. It should not be hard to add.
