Class: SyntaxTree::YARV::Legacy::OptGetInlineCache

Inherits:
Instruction
  • Object
show all
Defined in:
lib/syntax_tree/yarv/legacy.rb

Overview

### Summary

opt_getinlinecache is a wrapper around a series of putobject and getconstant instructions that allows skipping past them if the inline cache is currently set. It pushes the value of the cache onto the stack if it is set, otherwise it pushes nil.

This instruction is no longer used since in Ruby 3.2 it was replaced by the consolidated opt_getconstant_path instruction.

### Usage

~~~ruby Constant ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

#canonical, #leaves?, #pops, #side_effects?

Constructor Details

#initialize(label, cache) ⇒ OptGetInlineCache

Returns a new instance of OptGetInlineCache.



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# File 'lib/syntax_tree/yarv/legacy.rb', line 81

def initialize(label, cache)
  @label = label
  @cache = cache
end

Instance Attribute Details

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



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# File 'lib/syntax_tree/yarv/legacy.rb', line 79

def cache
  @cache
end

#label ⇒ Object (readonly)

Returns the value of attribute label.



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# File 'lib/syntax_tree/yarv/legacy.rb', line 79

def label
  @label
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 101

def ==(other)
  other.is_a?(OptGetInlineCache) && other.label == label &&
    other.cache == cache
end

#branch_targets ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 118

def branch_targets
  [label]
end

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 114

def call(vm)
  vm.push(nil)
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 97

def deconstruct_keys(_keys)
  { label: label, cache: cache }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 86

def disasm(fmt)
  fmt.instruction(
    "opt_getinlinecache",
    [fmt.label(label), fmt.inline_storage(cache)]
  )
end

#falls_through? ⇒ Boolean

Returns:



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# File 'lib/syntax_tree/yarv/legacy.rb', line 122

def falls_through?
  true
end

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 106

def length
  3
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 110

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 93

def to_a(_iseq)
  [:opt_getinlinecache, label.name, cache]
end