Class: SyntaxTree::YARV::OptEq

Inherits:
Instruction show all
Defined in:
lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

opt_eq is a specialization of the opt_send_without_block instruction that occurs when the == operator is used. Fast paths exist when both operands are integers, floats, symbols or strings. It pops both the receiver and the argument off the stack and pushes on the result.

### Usage

~~~ruby 2 == 2 ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

#branch_targets, #falls_through?, #leaves?, #side_effects?

Constructor Details

#initialize(calldata) ⇒ OptEq

Returns a new instance of OptEq.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3089

def initialize(calldata)
  @calldata = calldata
end

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3087

def calldata
  @calldata
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3105

def ==(other)
  other.is_a?(OptEq) && other.calldata == calldata
end

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3125

def call(vm)
  canonical.call(vm)
end

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3121

def canonical
  Send.new(calldata, nil)
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3101

def deconstruct_keys(_keys)
  { calldata: calldata }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3093

def disasm(fmt)
  fmt.instruction("opt_eq", [fmt.calldata(calldata)])
end

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3109

def length
  2
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3113

def pops
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3117

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3097

def to_a(_iseq)
  [:opt_eq, calldata.to_h]
end