Change control flow. More...

Typedefs
typedef struct ir_switch_table	ir_switch_table
	A switch table mapping integer numbers to proj-numbers of a Switch-node.
Enumerations
enum	n_Switch { n_Switch_selector, n_Switch_max = n_Switch_selector }
	Input numbers for Switch node. More...
enum	pn_Switch { pn_Switch_default, pn_Switch_max = pn_Switch_default }
	Projection numbers for result of Switch node (use for Proj nodes) More...
Functions
ir_switch_table *	ir_new_switch_table (ir_graph *irg, size_t n_entries)
	Creates a new switch_table datastructure with `n_entries` entries.
size_t	ir_switch_table_get_n_entries (const ir_switch_table *table)
	Returns number of entries available in switch table `table`.
void	ir_switch_table_set (ir_switch_table table, size_t entry, ir_tarval min, ir_tarval *max, long pn)
	Sets entry number `entry` in the switch table `table`.
ir_tarval *	ir_switch_table_get_max (const ir_switch_table *table, size_t entry)
	Returns maximum tarval value of switch table entry `entry`.
ir_tarval *	ir_switch_table_get_min (const ir_switch_table *table, size_t entry)
	Returns minimum tarval value of switch table entry `entry`.
long	ir_switch_table_get_pn (const ir_switch_table *table, size_t entry)
	Returns proj number taken if switch table entry `entry` matches.
ir_switch_table *	ir_switch_table_duplicate (ir_graph irg, const ir_switch_table table)
	Duplicates switch table `table` on obstack of `irg`.
ir_node *	new_rd_Switch (dbg_info dbgi, ir_node block, ir_node irn_selector, unsigned n_outs, ir_switch_table table)
	Construct a Switch node.
ir_node *	new_r_Switch (ir_node block, ir_node irn_selector, unsigned n_outs, ir_switch_table *table)
	Construct a Switch node.
ir_node *	new_d_Switch (dbg_info dbgi, ir_node irn_selector, unsigned n_outs, ir_switch_table *table)
	Construct a Switch node.
ir_node *	new_Switch (ir_node irn_selector, unsigned n_outs, ir_switch_table table)
	Construct a Switch node.
int	is_Switch (const ir_node *node)
	Test if node is a Switch.
ir_node *	get_Switch_selector (const ir_node *node)
	Returns selector input of a Switch node.
void	set_Switch_selector (ir_node node, ir_node selector)
	Sets selector input of a Switch node.
unsigned	get_Switch_n_outs (const ir_node *node)
	Returns n_outs attribute of a Switch node.
void	set_Switch_n_outs (ir_node *node, unsigned n_outs)
	Sets n_outs attribute of a Switch node.
ir_switch_table *	get_Switch_table (const ir_node *node)
	Returns table attribute of a Switch node.
void	set_Switch_table (ir_node node, ir_switch_table table)
	Sets table attribute of a Switch node.
ir_op *	get_op_Switch (void)
	Returns opcode for Switch nodes.
Variables
ir_op *	op_Switch
	Switch opcode.

Detailed Description

Change control flow.

The destination is choosen based on an integer input value which is looked up in a table.

Backends can implement this efficiently using a jump table.

Typedef Documentation

typedef struct ir_switch_table ir_switch_table

A switch table mapping integer numbers to proj-numbers of a Switch-node.

Entries map a continuous range of integer numbers to a proj-number. There must never be two different entries matching the same integer number.

Definition at line 133 of file firm_types.h.

Enumeration Type Documentation

enum n_Switch

Input numbers for Switch node.

Definition at line 3656 of file nodeops.h.

enum pn_Switch

Projection numbers for result of Switch node (use for Proj nodes)

Enumerator:

pn_Switch_default

control flow if no other case matches

Definition at line 3665 of file nodeops.h.

Function Documentation

ir_op* get_op_Switch ( void )

Returns opcode for Switch nodes.

unsigned get_Switch_n_outs ( const ir_node * node )

Returns n_outs attribute of a Switch node.

ir_node* get_Switch_selector ( const ir_node * node )

Returns selector input of a Switch node.

ir_switch_table* get_Switch_table ( const ir_node * node )

Returns table attribute of a Switch node.

ir_switch_table* ir_new_switch_table	(	ir_graph *	irg,
		size_t	n_entries
	)

Creates a new switch_table datastructure with n_entries entries.

The datastructure is allocated on the obstack of irg.

ir_switch_table* ir_switch_table_duplicate	(	ir_graph *	irg,
		const ir_switch_table *	table
	)

Duplicates switch table table on obstack of irg.

ir_tarval* ir_switch_table_get_max	(	const ir_switch_table *	table,
		size_t	entry
	)

Returns maximum tarval value of switch table entry entry.

ir_tarval* ir_switch_table_get_min	(	const ir_switch_table *	table,
		size_t	entry
	)

Returns minimum tarval value of switch table entry entry.

size_t ir_switch_table_get_n_entries ( const ir_switch_table * table )

Returns number of entries available in switch table table.

long ir_switch_table_get_pn	(	const ir_switch_table *	table,
		size_t	entry
	)

Returns proj number taken if switch table entry entry matches.

void ir_switch_table_set	(	ir_switch_table *	table,
		size_t	entry,
		ir_tarval *	min,
		ir_tarval *	max,
		long	pn
	)

Sets entry number entry in the switch table table.

Parameters:

table	the switch table
entry	entry number to set
min	The minimum tarval that matches this entry
max	The maximum tarval that matches this entry
pn	Proj number taken on match

int is_Switch ( const ir_node * node )

Test if node is a Switch.

Returns:: 1 if the node is a Switch node, 0 otherwise

ir_node* new_d_Switch	(	dbg_info *	dbgi,
		ir_node *	irn_selector,
		unsigned	n_outs,
		ir_switch_table *	table
	)

Construct a Switch node.

Parameters:

dbgi	A pointer to debug information.
irn_selector	input selector
n_outs	number of outputs (including pn_Switch_default)
table	table describing mapping from input values to Proj numbers

ir_node* new_r_Switch	(	ir_node *	block,
		ir_node *	irn_selector,
		unsigned	n_outs,
		ir_switch_table *	table
	)

Construct a Switch node.

Parameters:

block	The IR block the node belongs to.
irn_selector	input selector
n_outs	number of outputs (including pn_Switch_default)
table	table describing mapping from input values to Proj numbers

ir_node* new_rd_Switch	(	dbg_info *	dbgi,
		ir_node *	block,
		ir_node *	irn_selector,
		unsigned	n_outs,
		ir_switch_table *	table
	)

Construct a Switch node.

Parameters:

dbgi	A pointer to debug information.
block	The IR block the node belongs to.
irn_selector	input selector
n_outs	number of outputs (including pn_Switch_default)
table	table describing mapping from input values to Proj numbers

ir_node* new_Switch	(	ir_node *	irn_selector,
		unsigned	n_outs,
		ir_switch_table *	table
	)

Construct a Switch node.

Parameters:

irn_selector	input selector
n_outs	number of outputs (including pn_Switch_default)
table	table describing mapping from input values to Proj numbers

void set_Switch_n_outs	(	ir_node *	node,
		unsigned	n_outs
	)

Sets n_outs attribute of a Switch node.

void set_Switch_selector	(	ir_node *	node,
		ir_node *	selector
	)

Sets selector input of a Switch node.

void set_Switch_table	(	ir_node *	node,
		ir_switch_table *	table
	)

Sets table attribute of a Switch node.

Variable Documentation

ir_op* op_Switch

Switch opcode.

Definition at line 349 of file opcodes.h.

Typedefs

Enumerations

Functions

Variables

Detailed Description

Typedef Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation