#include <tree-ssa-propagate.h>

Inheritance diagram for ssa_propagation_engine:

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Public Member Functions
virtual	~ssa_propagation_engine (void)

virtual enum ssa_prop_result	visit_stmt (gimple , edge , tree *)=0

virtual enum ssa_prop_result	visit_phi (gphi *)=0

void	ssa_propagate (void)

Private Member Functions
void	simulate_stmt (gimple *stmt)

void	simulate_block (basic_block)

Detailed Description

Public interface into the SSA propagation engine.  Clients should inherit
from this class and provide their own visitors.

Constructor & Destructor Documentation

◆ ~ssa_propagation_engine()

virtual ssa_propagation_engine::~ssa_propagation_engine ( void )

inlinevirtual

Member Function Documentation

◆ simulate_block()

void ssa_propagation_engine::simulate_block ( basic_block block )

private

Simulate the execution of BLOCK.  Evaluate the statement associated
with each variable reference inside the block.

References add_control_edge(), BB_VISITED, cfun, dump_file, dump_flags, EXIT_BLOCK_PTR_FOR_FN, basic_block_def::flags, FOR_EACH_EDGE, gsi_end_p(), gsi_next(), gsi_start_bb(), gsi_start_phis(), gsi_stmt(), basic_block_def::index, NULL, simulate_stmt(), basic_block_def::succs, and TDF_DETAILS.

Referenced by ssa_propagate().

◆ simulate_stmt()

void ssa_propagation_engine::simulate_stmt ( gimple * stmt )

private

Simulate the execution of STMT and update the work lists accordingly.

References add_control_edge(), add_ssa_edge(), as_a(), bitmap_clear_bit(), dump_file, dump_flags, FOR_EACH_EDGE, FOR_EACH_SSA_USE_OPERAND, gimple_bb(), gimple_nop_p(), gimple_phi_result(), gimple_uid(), NULL, NULL_TREE, PHI_ARG_DEF_FROM_EDGE, prop_set_simulate_again(), prop_simulate_again_p(), ssa_edge_worklist, SSA_NAME_DEF_STMT, SSA_NAME_IS_DEFAULT_DEF, SSA_OP_USE, SSA_PROP_INTERESTING, SSA_PROP_NOT_INTERESTING, SSA_PROP_VARYING, stmt_ends_bb_p(), basic_block_def::succs, TDF_DETAILS, TREE_CODE, USE_FROM_PTR, visit_phi(), and visit_stmt().

Referenced by simulate_block(), and ssa_propagate().

◆ ssa_propagate()

void ssa_propagation_engine::ssa_propagate ( void )

Entry point to the propagation engine.

The VISIT_STMT virtual function is called for every statement
visited and the VISIT_PHI virtual function is called for every PHI
node visited.

References add_control_edge(), BASIC_BLOCK_FOR_FN, bb_to_cfg_order, bitmap_clear_bit(), bitmap_empty_p(), bitmap_first_set_bit(), cfg_blocks, cfg_order_to_bb, cfun, curr_order, dump_file, dump_flags, ENTRY_BLOCK_PTR_FOR_FN, FOR_EACH_EDGE, gimple_bb(), basic_block_def::index, NULL, print_gimple_stmt(), simulate_block(), simulate_stmt(), ssa_edge_worklist, ssa_prop_fini(), ssa_prop_init(), TDF_DETAILS, and uid_to_stmt.