Phi node

Choose a value based on control flow. More...

Functions
int	is_Phi0 (const ir_node *n)
	Returns 1 if irg in phase phase_building and the Phi has zero predecessors.
ir_node **	get_Phi_preds_arr (ir_node *node)
	Returns all phi predecessors as array.
int	get_Phi_n_preds (const ir_node *node)
	Returns number of predecessors of phi node node.
ir_node *	get_Phi_pred (const ir_node *node, int pos)
	Returns the predecessor with number pos of phi node node.
void	set_Phi_pred (ir_node *node, int pos, ir_node *pred)
	Sets value pred as predecessor number pos of phi node node.
ir_node *	get_Phi_next (const ir_node *phi)
	Returns the next element of a block phi list.
void	set_Phi_next (ir_node *phi, ir_node *next)
	Sets the next link of a block Phi list.
ir_node *	new_rd_Phi (dbg_info *dbgi, ir_node *block, int arity, ir_node *const *in, ir_mode *mode)
	Construct a Phi node.
ir_node *	new_r_Phi (ir_node *block, int arity, ir_node *const *in, ir_mode *mode)
	Construct a Phi node.
ir_node *	new_d_Phi (dbg_info *dbgi, int arity, ir_node *const *in, ir_mode *mode)
	Construct a Phi node.
ir_node *	new_Phi (int arity, ir_node *const *in, ir_mode *mode)
	Construct a Phi node.
int	is_Phi (const ir_node *node)
	Test if node is a Phi.
ir_op *	get_op_Phi (void)
	Returns opcode for Phi nodes.
Variables
ir_op *	op_Phi
	Phi opcode.

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Detailed Description

Choose a value based on control flow.

A phi node has 1 input for each predecessor of its block. If a block is entered from its nth predecessor all phi nodes produce their nth input as result.

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Function Documentation

ir_op* get_op_Phi

(

void

)

Returns opcode for Phi nodes.

int get_Phi_n_preds

(

const ir_node *

node

)

Returns number of predecessors of phi node node.

ir_node* get_Phi_next

(

const ir_node *

phi

)

Returns the next element of a block phi list.

ir_node* get_Phi_pred	(	const ir_node *	node,
		int	pos
	)

Returns the predecessor with number pos of phi node node.

This is the value selected when control flow comes from predecessor pos of the containing basic block.

ir_node** get_Phi_preds_arr

(

ir_node *

node

)

Returns all phi predecessors as array.

int is_Phi

(

const ir_node *

node

)

Test if node is a Phi.

Returns:

1 if the node is a Phi node, 0 otherwise

int is_Phi0

(

const ir_node *

n

)

Returns 1 if irg in phase phase_building and the Phi has zero predecessors.

It's a "Phi0" then.

ir_node* new_d_Phi	(	dbg_info *	dbgi,
		int	arity,
		ir_node *const *	in,
		ir_mode *	mode
	)

Construct a Phi node.

Parameters:

dbgi	A pointer to debug information.
arity	size of additional inputs array
in	additional inputs
mode	mode of the operations result

ir_node* new_Phi	(	int	arity,
		ir_node *const *	in,
		ir_mode *	mode
	)

Construct a Phi node.

Parameters:

arity	size of additional inputs array
in	additional inputs
mode	mode of the operations result

ir_node* new_r_Phi	(	ir_node *	block,
		int	arity,
		ir_node *const *	in,
		ir_mode *	mode
	)

Construct a Phi node.

Parameters:

block	The IR block the node belongs to.
arity	size of additional inputs array
in	additional inputs
mode	mode of the operations result

ir_node* new_rd_Phi	(	dbg_info *	dbgi,
		ir_node *	block,
		int	arity,
		ir_node *const *	in,
		ir_mode *	mode
	)

Construct a Phi node.

Parameters:

dbgi	A pointer to debug information.
block	The IR block the node belongs to.
arity	size of additional inputs array
in	additional inputs
mode	mode of the operations result

void set_Phi_next	(	ir_node *	phi,
		ir_node *	next
	)

Sets the next link of a block Phi list.

void set_Phi_pred	(	ir_node *	node,
		int	pos,
		ir_node *	pred
	)

Sets value pred as predecessor number pos of phi node node.

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Variable Documentation

ir_op* op_Phi

Phi opcode.

Definition at line 284 of file opcodes.h.