r181815 - in /trunk/gcc: ChangeLog optabs.c tes...

[amacleod@gcc.gnu.org]

Author: amacleod
Date: Tue Nov 29 19:42:44 2011
New Revision: 181815

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181815
Log:
2011-11-29  Andrew MacLeod  <amacleod@redhat.com>

	PR target/50123
	* optabs.c (maybe_optimize_fetch_op): New.  Look for more optimal
	instructions for a FECTH_OP or OP_FECTH sequence.
	(expand_atomic_fetch_op): Call maybe_optimize_fetch_op.
	* testsuite/gcc.dg/atomic-op-optimize.c: New.  Test for optimizations.


Added:
    trunk/gcc/testsuite/gcc.dg/atomic-op-optimize.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/optabs.c
    trunk/gcc/testsuite/ChangeLog