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[Bug target/61142] [SH] QImode/HImode @(R0,Rm),Rn does not load to Rn = R0
- From: "olegendo at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 21 Dec 2014 12:40:38 +0000
- Subject: [Bug target/61142] [SH] QImode/HImode @(R0,Rm),Rn does not load to Rn = R0
- Auto-submitted: auto-generated
- References: <bug-61142-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61142
Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
While working on adding some patterns for PR 64345, the issue got even worse.
The problem in the description is just the tip of the iceberg. For the time
being a bunch of peephole patterns can be used to limit the damage. The
peepholes that I've added also seem to improve code when LRA is used.