[vala] (12 commits) Created branch wip/effectfree

[Luca Bruno <lucabru src gnome org>]

The branch 'wip/effectfree' was created.

Summary of new commits:

  6b482cf... Emit left-handed side of assignment when it's a field or pa
  7797547... codegen: Use lvalue of the assignment when emitting array a
  07966b4... codegen: Unset array_size_cvalue in load_variable
  23aac19... Add get_defined_variables in PostfixExpression
  9d4787e... Set parent_node of the expression of delete statements
  bb65fa5... Set parent_node of the postfix inner expression
  b7813a9... Set lvalue to the inner expression of address-of expression
  4572586... Set lvalue to inner expression of method call that returns 
  8a2623d... codegen: Add create_temp_value
  b0548a6... codegen: Use temporary variables for local variable access
  4f3c02f... codegen: Use temporary variables for parameter access
  195ece7... codegen: Use temporary variables for field access