Class: CodeTools::AST::SendFastNew

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

Overview

Emits a fast path for #new

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 252

def self.match?(line, receiver, name, arguments, privately)
  # ignore vcall style
  return false if !arguments and privately
  name == :new
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/transforms.rb', line 258

def bytecode(g)
  return super(g) if @block or @arguments.splat?

  pos(g)

  slow = g.new_label
  done = g.new_label

  @receiver.bytecode(g)
  g.dup

  if @privately
    g.check_serial_private :new, Rubinius::CompiledCode::KernelMethodSerial
  else
    g.check_serial :new, Rubinius::CompiledCode::KernelMethodSerial
  end
  g.goto_if_false slow

  # fast path
  g.send :allocate, 0, true
  g.dup
  @arguments.bytecode(g)
  g.send :initialize, @arguments.size, true
  g.pop

  g.goto done

  # slow path
  slow.set!
  @arguments.bytecode(g)
  g.send :new, @arguments.size, @privately

  done.set!
end