Remove the remaining LOperand-members from concrete LIR instructions.

This change introduces the third template parameters for LIR instructions
to specify the number of temp-operands. This is one step towards
removing the instruction-summaries.

I also added hydrogen-accessors in more places and refactored
the LIR-branch instructions to have common super-classes to 
avoid code duplication.

Added MUST_USE_RESULT to the functions that record uses
and definitions so that all LOperands are stored in the
LIR instructions (and not only in the summaries).



Review URL: http://codereview.chromium.org/6237002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6345 ce2b1a6d-e550-0410-aec6-3dcde31c8c00