Class: Kumi::IR::Base::Block

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/kumi/ir/base/block.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, instructions: []) ⇒ Block

Returns a new instance of Block.



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# File 'lib/kumi/ir/base/block.rb', line 11

def initialize(name:, instructions: [])
  @name = name.to_sym
  @instructions = instructions.dup
end

Instance Attribute Details

#instructions ⇒ Object (readonly)

Returns the value of attribute instructions.



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# File 'lib/kumi/ir/base/block.rb', line 9

def instructions
  @instructions
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/kumi/ir/base/block.rb', line 9

def name
  @name
end

Instance Method Details

#append(instr) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/kumi/ir/base/block.rb', line 20

def append(instr)
  raise ArgumentError, "instruction required" unless instr.is_a?(Instruction)

  @instructions << instr
  instr
end

#each ⇒ Object 



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# File 'lib/kumi/ir/base/block.rb', line 16

def each(&)
  @instructions.each(&)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kumi/ir/base/block.rb', line 27

def empty?
  @instructions.empty?
end

#terminal_instruction ⇒ Object

The block’s last result-bearing instruction. By the IR convention this is the function’s result, so passes that drop/dedup instructions use it to avoid collapsing the terminal (which would change what the function returns). nil for a block that defines no value.



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# File 'lib/kumi/ir/base/block.rb', line 35

def terminal_instruction
  @instructions.reverse_each.find { |instr| instr.defs.first }
end