https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68930
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-12-16
CC|rguenther at suse dot de |rguenth at gcc dot
gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I suppose the dump is misleading in that the inline clone has
Modification phase of node q.constprop/5
Aggregate replacements: 0[0]=1, 0[32]=2
applied to?
__attribute__((noinline))
q.constprop (struct a a)
{
<bb 3>:
<bb 2>:
t (a);
return;
}
instead would look like wrong-code.
Ah, IPA-CP doesn't actually remove "const" parameters.
So this report is reporting that IPA-CP thinks it does sth but in the
end it's a no-op clone.
I wonder why we don't simply add
a.a = 1;
a.b = 2;
at the start of q.constprop. Or if we only know a partially then initialize
those parts from the know constants?
