------- Comment #1 from pinskia at gcc dot gnu dot org 2006-05-15 23:29 -------
This is a middle-end issue when expanding:
a->b = {};
it creates a huge array on the stack.
In 4.0.3, we created a huge array on the heap which is just as wrong but not as
bad even though some heaps are limited (SPU).
We should just have one memset and no memcpy.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c++ |middle-end
Ever Confirmed|0 |1
GCC build triplet|i686-pc-linux-gnu |
GCC host triplet|i686-pc-linux-gnu |
GCC target triplet|i686-pc-linux-gnu |
Keywords| |missed-optimization
Known to fail| |4.1.0 4.2.0
Known to work| |4.0.3
Last reconfirmed|0000-00-00 00:00:00 |2006-05-15 23:29:46
date| |
Summary|g++.dg/init/array15.C uses |[4.1/4.2 Regression]
|4MB stack space |g++.dg/init/array15.C uses
| |4MB stack space
Target Milestone|--- |4.1.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27620
