https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70048
Richard Henderson <rth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |rth at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |rth at gcc dot gnu.org
--- Comment #6 from Richard Henderson <rth at gcc dot gnu.org> ---
Created attachment 37886
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37886&action=edit
proposed patch
I agree -- at minimum virtual and eliminable frame registers ought to be
special-cased. If we separate the constants too far, we'll never be able
to fold the constant plus the adjustment back together.
If the statement in #c4 is taken at face value -- that r233136 was applied
to simplify frame-based array accesses... Well, I simply don't believe that.
I can see how the patch would aid reduction of access to members of a
structure that are in an array which in turn is *not* on the stack. But
for the average stack-based access I can't see except that it would hurt.
