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[Bug tree-optimization/42586] SRA does not always work
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Jan 2010 06:30:06 -0000
- Subject: [Bug tree-optimization/42586] SRA does not always work
- References: <bug-42586-7834@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from pinskia at gcc dot gnu dot org 2010-01-03 06:30 -------
Oh in fact I think the reason is the SRA issue. In that:
int
Cyc_string_ungetc (int ignore, struct _fat_ptr *sptr)
{
sptr->curr += 4294967295U;
}
Works.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |tree-optimization
Keywords| |missed-optimization
Summary|load-modify-store on x86 |SRA does not always work
|should be single instruction|
Version|unknown |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42586