Unknown node

Returns an unknown (at compile- and runtime) value. More...

Functions
ir_node *	new_rd_Unknown (dbg_info *dbgi, ir_graph *irg, ir_mode *mode)
	Construct an Unknown node. More...
ir_node *	new_r_Unknown (ir_graph *irg, ir_mode *mode)
	Construct an Unknown node. More...
ir_node *	new_d_Unknown (dbg_info *dbgi, ir_mode *mode)
	Construct an Unknown node. More...
ir_node *	new_Unknown (ir_mode *mode)
	Construct an Unknown node. More...
int	is_Unknown (const ir_node *node)
	Test if node is a Unknown. More...
ir_op *	get_op_Unknown (void)
	Returns opcode for Unknown nodes. More...

Variables
ir_op *	op_Unknown
	Unknown opcode. More...

Detailed Description

Returns an unknown (at compile- and runtime) value.

It is a valid optimization to replace an Unknown by any other constant value.

Be careful when optimising Unknown values, you cannot simply replace Unknown+x or Unknown<x with a new Unknown node if there are multiple users of the original unknown node!

Function Documentation

ir_op* get_op_Unknown

(

void

)

Returns opcode for Unknown nodes.

Definition at line 2893 of file gen_irnode.c.

References op_Unknown.

int is_Unknown

(

const ir_node *

node

)

Test if node is a Unknown.

Returns

1 if the node is a Unknown node, 0 otherwise

Definition at line 3519 of file gen_irnode.c.

ir_node* new_d_Unknown	(	dbg_info *	dbgi,
		ir_mode *	mode
	)

Construct an Unknown node.

Parameters

dbgi	A pointer to debug information.
mode	mode of the operations result

Definition at line 2881 of file gen_irnode.c.

References current_ir_graph, IR_GRAPH_CONSTRAINT_CONSTRUCTION, irg_is_constrained(), and new_rd_Unknown().

Referenced by new_Unknown().

ir_node* new_r_Unknown	(	ir_graph *	irg,
		ir_mode *	mode
	)

Construct an Unknown node.

Parameters

irg	The IR graph the node belongs to.
mode	mode of the operations result

Definition at line 2876 of file gen_irnode.c.

References new_rd_Unknown().

ir_node* new_rd_Unknown	(	dbg_info *	dbgi,
		ir_graph *	irg,
		ir_mode *	mode
	)

Construct an Unknown node.

Parameters

dbgi	A pointer to debug information.
irg	The IR graph the node belongs to.
mode	mode of the operations result

Definition at line 2863 of file gen_irnode.c.

References get_irg_start_block(), new_ir_node(), op_Unknown, optimize_node(), and verify_new_node().

Referenced by new_d_Unknown(), and new_r_Unknown().

ir_node* new_Unknown

(

ir_mode *

mode

)

Construct an Unknown node.

Parameters

mode	mode of the operations result

Definition at line 2888 of file gen_irnode.c.

References new_d_Unknown().

Variable Documentation

ir_op* op_Unknown

Unknown opcode.

Definition at line 4283 of file nodes.h.

Referenced by get_op_Unknown(), and new_rd_Unknown().