Implement non-generic stores for object literals.

Implement non-generic stores for object literals.

This uses the type feedback already present for computed value stores
into object literals to generate optimized stores in Crankshaft, thus
avoiding unnecessary generic stores with side effects.

R=svenpanne@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=11023

[Sven Panne, 2012-03-13 09:46:00]

LGTM with a nit.

https://chromiumcodereview.appspot.com/9692036/diff/1/src/ast.h
File src/ast.h (right):

https://chromiumcodereview.appspot.com/9692036/diff/1/src/ast.h#newcode1344
src/ast.h:1344: bool is_monomorphic_;
I don't think we need this member, because is_monomorphic == true iff
receiver_type contains something non-nullish.

[Michael Starzinger, 2012-03-13 12:12:31]

Added new patch set. Landed.