https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107565
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Target| |x86_64
Last reconfirmed| |2022-11-08
Component|analyzer |target
Assignee|dmalcolm at gcc dot gnu.org |unassigned at gcc dot
gnu.org
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
else if (!fndecl_has_gimple_body_p (callee_fndecl)
&& (!(callee_fndecl_flags & (ECF_CONST | ECF_PURE)))
&& !fndecl_built_in_p (callee_fndecl))
unknown_side_effects = true;
The last part is part of the problem I think. At least here.
Yes maybe we should have another builtin which returns a "_Complex unsigned
long long" here which is folded into for __builtin_ia32_rdrand*_step to remove
the need to the address too.
I am going to declare this one as a target issue but there might be other
builtins which are harder to do the "_Complex" trick.
