const_and_copies Class Reference

#include <tree-ssa-scopedtables.h>

Collaboration diagram for const_and_copies:

Public Member Functions
	const_and_copies (void)
	~const_and_copies (void)
void	push_marker (void)
void	pop_to_marker (void)
void	record_const_or_copy (tree, tree)
void	record_const_or_copy (tree, tree, tree)

Private Member Functions
void	record_const_or_copy_raw (tree, tree, tree)
const_and_copies &	operator= (const const_and_copies &)
	const_and_copies (class const_and_copies &)

Private Attributes
vec< tree >	m_stack

Detailed Description

This class defines an unwindable const/copy equivalence table
layered on top of SSA_NAME_VALUE/set_ssa_name_value.

Essentially it's just a stack of name,prev value pairs with a
special marker (NULL) to indicate unwind points.   

Constructor & Destructor Documentation

const_and_copies() [1/2]

const_and_copies::const_and_copies ( void )

inline

References m_stack.

~const_and_copies()

const_and_copies::~const_and_copies ( void )

inline

References m_stack.

const_and_copies() [2/2]

const_and_copies::const_and_copies ( class const_and_copies & )

private

Member Function Documentation

operator=()

const_and_copies & const_and_copies::operator= ( const const_and_copies & )

private

pop_to_marker()

void const_and_copies::pop_to_marker

(

void

)

Pop entries off the stack until we hit the NULL marker.
For each entry popped, use the SRC/DEST pair to restore
SRC to its prior value.   

References dump_file, dump_flags, ggc_alloc(), m_stack, NULL, print_generic_expr(), set_ssa_name_value(), SSA_NAME_VALUE, and TDF_DETAILS.

Referenced by cprop_into_successor_phis().

push_marker()

void const_and_copies::push_marker ( void )

inline

References m_stack, and NULL_TREE.

Referenced by cprop_into_successor_phis().

record_const_or_copy() [1/2]

void const_and_copies::record_const_or_copy	(	tree	x,
		tree	y )

Record that X has the value Y.   

References record_const_or_copy(), SSA_NAME_VALUE, and y.

Referenced by cprop_into_successor_phis(), eliminate_redundant_computations(), record_const_or_copy(), and record_equality().

record_const_or_copy() [2/2]

void const_and_copies::record_const_or_copy	(	tree	x,
		tree	y,
		tree	prev_x )

Record that X has the value Y and that X's previous value is PREV_X. 

This variant follow's Y value chain.   

References ggc_alloc(), record_const_or_copy_raw(), SSA_NAME_VALUE, TREE_CODE, and y.

record_const_or_copy_raw()

void const_and_copies::record_const_or_copy_raw ( tree x, tree y, tree prev_x )

private

Record that X has the value Y and that X's previous value is PREV_X. 

This variant does not follow the value chain for Y.   

References dump_file, dump_flags, ggc_alloc(), m_stack, print_generic_expr(), set_ssa_name_value(), TDF_DETAILS, and y.

Referenced by record_const_or_copy().

Field Documentation

m_stack

vec<tree> const_and_copies::m_stack

private

Referenced by const_and_copies(), pop_to_marker(), push_marker(), record_const_or_copy_raw(), and ~const_and_copies().

---

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

• tree-ssa-scopedtables.h
• tree-ssa-scopedtables.cc