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.



3200
3201
3202
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3200

def initialize(calldata)
  @calldata = calldata
end

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.



3198
3199
3200
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3198

def calldata
  @calldata
end

Instance Method Details

#==(other) ⇒ Object 



3216
3217
3218
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3216

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

#call(vm) ⇒ Object 



3236
3237
3238
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3236

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

#canonical ⇒ Object 



3232
3233
3234
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3232

def canonical
  Send.new(calldata, nil)
end

#deconstruct_keys(_keys) ⇒ Object 



3212
3213
3214
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3212

def deconstruct_keys(_keys)
  { calldata: calldata }
end

#disasm(fmt) ⇒ Object 



3204
3205
3206
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3204

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

#length ⇒ Object 



3220
3221
3222
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3220

def length
  2
end

#pops ⇒ Object 



3224
3225
3226
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3224

def pops
  2
end

#pushes ⇒ Object 



3228
3229
3230
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3228

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



3208
3209
3210
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 3208

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