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[Bug rtl-optimization/49807] Missed byte (subreg) extraction when storing to volatile mem
- From: "gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 21 Jul 2011 20:46:35 +0000
- Subject: [Bug rtl-optimization/49807] Missed byte (subreg) extraction when storing to volatile mem
- Auto-submitted: auto-generated
- References: <bug-49807-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #5 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-21 20:46:05 UTC ---
In this case it would not reduce the size of the store, but how can this be
seen?
It cannot be seen from the insn/pattern alone.
Do you have an idea how to attack this optimization flaw?