commit 188d4316a880ae24aed315aa52dc503c4fcb1ec7
author Alexandre Rames <alexandre.rames@arm.com> Thu Apr 09 18:30:21 2015 +0100
committer Roland Levillain <rpl@google.com> Fri Apr 10 16:19:55 2015 +0000
tree a480bdc4a80f63d46abcde2ef7a36e1ad072d624
parent 27ef3177fb164b5e1a3b8a6fd43d25f3074e586d

Opt compiler: Instruction simplification for HAdd, HNeg, HNot, HSub.

Under assumptions for the 'cost' of each IR (eg. neither HAdd nor HSub
are faster than the other), transformations are only applied if they
(locally) cannot degrade the quality of the graph. The code could be
extended to look at uses of the IRs and detect more opportunities for
optimisations.  The optimisations in this patch do not look at other
uses for their inputs.

Change-Id: Ib60dab007af30f43421ef5bb55db2ec32fb8fc0c