tree 2200ec038f0134733f046d9f61ae7026a0fdadeb
parent 5d0acff3a2fa421923392aadb4df2742064b6248
author Jan Voung <jvoung@chromium.org> 1436216485 -0700
committer Jan Voung <jvoung@chromium.org> 1436216485 -0700

Fix ARM Om1 lowering for arithmetic, and test.

The original arithmetic lowering was introducing some
unused mov instructions from legalization (e.g., the upper
part of shift num bits -- which should be 0 anyway), and
div helper calls don't actually use the legalized
parameters (handled separately by lowerCall). These unused
instructions cause the Om1 allocator to assert that LRBegin
exists but LREnd does not.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=kschimpf@google.com

Review URL: https://codereview.chromium.org/1210073017.