[vala] (38 commits) Created branch wip/effectfree

[Luca Bruno <lucabru src gnome org>]

The branch 'wip/effectfree' was created.

Summary of new commits:

  97d0f93... Emit left-handed side of assignment when it's a field or pa
  30c4e95... codegen: Use lvalue of the assignment when emitting array a
  f4dc638... codegen: Unset array_size_cvalue in load_variable
  2546bdd... Add get_defined_variables in PostfixExpression
  9e30b3a... Set parent_node of the expression of delete statements
  7dd12f7... Set parent_node of the postfix inner expression
  e55748e... Set lvalue to the inner expression of address-of expression
  f0fd934... Set lvalue to inner expression of method call that returns 
  78e4a25... Set lvalue to inner member access having type non-nullable 
  57ac1fb... codegen: Cleanup emit_temp_var
  184ddce... codegen: Add create_temp_value, load_temp_value and store_t
  323c310... codegen: Use temporary variables when accessing a variable
  d5e53f5... codegen: Use temporary variables when accessing a property
  30d7e0d... codegen: Make transform_value be effect-free
  2a4042c... codegen: Make copy_value be effect-free
  a972da3... codegen: Drop useless temporary variable in array creation
  8bbd8b1... codegen: Drop useless temporary variable in simple assignme
  459d244... codegen: Cleanup simple assignment
  4c5f384... codegen: Drop useless temporary variables when storing a pr
  c002e63... codegen: Drop useless temp variable when accessing base met
  c342e7e... codegen: Drop useless temporary variable in visit_cast_expr
  719c98e... codegen: Drop useless temporary variable in visit_end_full_
  765f767... codegen: Simplify emit of postfix expression
  727b491... codegen: Use create_temp_value in struct initializer
  314e1a3... codegen: Use create_temp_value in visit_object_creation_exp
  407ea61... codegen: Use store_temp_value in visit_reference_transfer_e
  c214a50... codegen: Use create_temp_value in visit_binary_expression
  c318171... codegen: Use create_temp_value in handle_struct_argument
  68cc8d2... codegen: Use create_temp_value in try_cast_value_to_type
  c18c821... codegen: Use create_temp_value in store_property
  61a8219... codegen: Use create_temp_value in visit_string_switch_state
  1ddf0a4... codegen: Use store_temp_value in visit_return_statement
  ebb995c... codegen: Replace temp_ref_vars with temp_ref_values using T
  1a62a8b... codegen: Use create_temp_value in copy_value of array modul
  ae83008... codegen: Use create_temp_value in copy_value
  611d9cb... codegen: Use create_temp_value in try_cast_variant_to_type
  cf0c7d0... codegen: Add lvalue field to GLibValue
  0ebb57e... codegen: Use GLibValue.lvalue when taking the address of an