class SyntaxTree::YARV::Instruction

# File lib/syntax_tree/yarv/instructions.rb, line 33
def branch_targets
  []
end

This returns an array of labels.

# File lib/syntax_tree/yarv/instructions.rb, line 11
def canonical
  self
end

This method creates an instruction that represents the canonical (non-specialized) form of this instruction. If this instruction is not a specialized instruction, then this method returns ‘self`.

# File lib/syntax_tree/yarv/instructions.rb, line 44
def falls_through?
  false
end

Whether or not this instruction falls through to the next instruction if its branching fails.

# File lib/syntax_tree/yarv/instructions.rb, line 38
def leaves?
  false
end

Whether or not this instruction leaves the current frame.

# File lib/syntax_tree/yarv/instructions.rb, line 18
def length
  1
end

This returns the size of the instruction in terms of the number of slots it occupies in the instruction sequence. Effectively this is 1 plus the number of operands.

# File lib/syntax_tree/yarv/instructions.rb, line 28
def pops
  0
end

This returns the number of values that are popped off the stack.

# File lib/syntax_tree/yarv/instructions.rb, line 23
def pushes
  0
end

This returns the number of values that are pushed onto the stack.

# File lib/syntax_tree/yarv/instructions.rb, line 51
def side_effects?
  true
end

Does the instruction have side effects? Control-flow counts as a side-effect, as do some special-case instructions like Leave. By default every instruction is marked as having side effects.