構造体定義書

struct induction

No.	名称	属性	説明
1	induction
	insn	rtx	The insn that sets a biv or giv
	new_reg	rtx	New register, containing strength reduced
	src_reg	rtx	Biv from which this giv is computed.
	giv_type	g_types	Indicate whether DEST_ADDR or DEST_REG
	dest_reg	rtx	Destination register for insn: this is the
	location	rtx *	Place in the insn where this giv occurs.
	mode	machine_mode	The mode of this biv or giv
	mem_mode	machine_mode	For DEST_ADDR, mode of the memory object.
	mult_val	rtx	Multiplicative factor for src_reg.
	add_val	rtx	Additive constant for that product.
	benefit	int	Gain from eliminating this insn.
	final_value	rtx	If the giv is used outside the loop, and its
	replaceable	unsigned	1 if we can substitute the strength-reduced
	not_replaceable	unsigned	Used to prevent duplicating work. This is
	ignore	unsigned	1 prohibits further processing of giv
	always_computable	unsigned	1 if this set occurs each iteration
	maybe_multiple	unsigned	Only used for a biv and 1 if this biv
	cant_derive	unsigned	For giv's, 1 if this giv cannot derive
	combined_with	unsigned	1 if this giv has been combined with. It
	maybe_dead	unsigned	1 if this giv might be dead. In that case,
	lifetime	int	Length of life of this giv
	times_used	int	# times this giv is used.
	derive_adjustment	rtx	If nonzero, is an adjustment to be
	next_iv	induction *	For givs, links together all givs that are
	same	induction *	If this giv has been combined with another
	const_adjust	HOST_WIDE_INT	Used by loop unrolling, when an address giv

induction