Class: CodeTools::AST::SendFastCoerceTo

Inherits:
SendWithArguments show all
Defined in:
lib/rubinius/code/ast/transforms.rb

Overview

Speeds up certain forms of Type.coerce_to

Instance Attribute Summary

Attributes inherited from SendWithArguments

#arguments

Attributes inherited from Send

#block, #name, #privately, #receiver, #variable, #vcall_style

Attributes inherited from Node

#line

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from SendWithArguments

#arguments_sexp, #initialize

Methods inherited from Send

#arguments_sexp, #check_local_reference, #defined, #initialize, #receiver_sexp, #sexp_name, #to_sexp, #value_defined

Methods inherited from Node

#ascii_graph, #attributes, #children, #defined, #initialize, match_arguments?, match_send?, #new_block_generator, #new_generator, #node_name, #or_bytecode, #pos, #set_child, #to_sexp, #transform, transform, transform_comment, transform_kind, transform_kind=, transform_name, #value_defined, #visit, #walk

Constructor Details

This class inherits a constructor from CodeTools::AST::SendWithArguments

Class Method Details

.match?(line, receiver, name, arguments, privately) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubinius/code/ast/transforms.rb', line 334

def self.match?(line, receiver, name, arguments, privately)
  methods = [:coerce_to, :check_convert_type, :try_convert]
  receiver.kind_of?(TypeConstant) && methods.include?(name) &&
    arguments.body.size == 3
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/transforms.rb', line 340

def bytecode(g)
  pos(g)
  var = @arguments.array[0]
  const = @arguments.array[1]

  if (var.kind_of?(LocalVariableAccess) ||
      var.kind_of?(InstanceVariableAccess)) and
     (const.kind_of?(ConstantAccess) ||
      const.kind_of?(ScopedConstant) ||
      const.kind_of?(ToplevelConstant))
    done = g.new_label

    var.bytecode(g)
    g.dup
    const.bytecode(g)
    g.swap
    g.kind_of
    g.goto_if_true done
    g.pop
    super(g)

    done.set!
  else
    super(g)
  end
end