control_dependences Class Reference

#include <cfganal.h>

Collaboration diagram for control_dependences:

Public Member Functions
	control_dependences ()
	~control_dependences ()
bitmap	get_edges_dependent_on (int)
basic_block	get_edge_src (int)
basic_block	get_edge_dest (int)

Private Member Functions
void	set_control_dependence_map_bit (basic_block, int)
void	clear_control_dependence_bitmap (basic_block)
void	find_control_dependence (int)

Private Attributes
vec< bitmap_head >	control_dependence_map
vec< std::pair< int, int > >	m_el
bitmap_obstack	m_bitmaps

Detailed Description

Class to compute and manage control dependences on an edge-list.   

Constructor & Destructor Documentation

control_dependences()

control_dependences::control_dependences

(

)

Record all blocks' control dependences on all edges in the edge
list EL, ala Morgan, Section 3.6.   

References bitmap_initialize(), bitmap_obstack_initialize(), cfun, control_dependence_map, EDGE_COUNT, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK_PTR_FOR_FN, find_control_dependence(), FOR_BB_BETWEEN, FOR_EACH_EDGE, ggc_alloc(), i, last_basic_block_for_fn, m_bitmaps, m_el, basic_block_def::succs, timevar_pop(), and timevar_push().

~control_dependences()

control_dependences::~control_dependences

(

)

Free control dependences and the associated edge list.   

References bitmap_obstack_release(), control_dependence_map, m_bitmaps, and m_el.

Member Function Documentation

clear_control_dependence_bitmap()

void control_dependences::clear_control_dependence_bitmap ( basic_block bb )

private

Clear all control dependences for block BB.   

References bitmap_clear(), control_dependence_map, and basic_block_def::index.

find_control_dependence()

void control_dependences::find_control_dependence ( int edge_index )

private

Determine all blocks' control dependences on the given edge with edge_list
EL index EDGE_INDEX, ala Morgan, Section 3.6.   

References CDI_POST_DOMINATORS, cfun, EXIT_BLOCK_PTR_FOR_FN, gcc_assert, get_edge_dest(), get_edge_src(), get_immediate_dominator(), ggc_alloc(), and set_control_dependence_map_bit().

Referenced by control_dependences().

get_edge_dest()

basic_block control_dependences::get_edge_dest

(

int

i

)

Returns the edge destination with index I from the edge list.   

References BASIC_BLOCK_FOR_FN, cfun, i, and m_el.

Referenced by find_control_dependence().

get_edge_src()

basic_block control_dependences::get_edge_src

(

int

i

)

Returns the edge source with index I from the edge list.   

References BASIC_BLOCK_FOR_FN, cfun, i, and m_el.

Referenced by control_parents_preserved_p(), create_edge_for_control_dependence(), find_control_dependence(), and mark_control_dependent_edges_necessary().

get_edges_dependent_on()

bitmap control_dependences::get_edges_dependent_on

(

int

i

)

Returns the bitmap of edges the basic-block I is dependent on.   

References control_dependence_map, and i.

Referenced by control_parents_preserved_p(), create_edge_for_control_dependence(), and mark_control_dependent_edges_necessary().

set_control_dependence_map_bit()

void control_dependences::set_control_dependence_map_bit ( basic_block bb, int edge_index )

private

Functions to compute control dependences.   

Indicate block BB is control dependent on an edge with index EDGE_INDEX.   

References bitmap_set_bit, cfun, control_dependence_map, ENTRY_BLOCK_PTR_FOR_FN, EXIT_BLOCK_PTR_FOR_FN, gcc_assert, and basic_block_def::index.

Referenced by find_control_dependence().

Field Documentation

control_dependence_map

vec<bitmap_head> control_dependences::control_dependence_map

private

Referenced by clear_control_dependence_bitmap(), control_dependences(), get_edges_dependent_on(), set_control_dependence_map_bit(), and ~control_dependences().

m_bitmaps

bitmap_obstack control_dependences::m_bitmaps

private

Referenced by control_dependences(), and ~control_dependences().

m_el

vec<std::pair<int, int> > control_dependences::m_el

private

Referenced by control_dependences(), get_edge_dest(), get_edge_src(), and ~control_dependences().

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The documentation for this class was generated from the following files:

• cfganal.h
• cfganal.cc