Where it's simple to do so (keyed calls, calls to unknown global variables,
calls to local variables and non-property/non-variable expressions), end the
live range of argument subexpressions immediately after the last use of the
expression rather than at the call.

R=fschneider@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/7274020

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8445 ce2b1a6d-e550-0410-aec6-3dcde31c8c00