This graph shows which files directly or indirectly include this file:

Functions
void	simple_dce_from_worklist (bitmap, bitmap=nullptr, bool no_delete=false)

Function Documentation

◆ simple_dce_from_worklist()

void simple_dce_from_worklist	(	bitmap	worklist,
		bitmap	need_eh_cleanup,
		bool	no_delete )

extern

Copyright (C) 2017-2026 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.

GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.

A cheap DCE interface.  WORKLIST is a list of possibly dead stmts and
is consumed by this function.  The function has linear complexity in
the number of dead stmts with a constant factor like the average SSA
use operands number.
If no_delete is true (defaults to false) then rather than deleting the
statement, it is replaced with an assignment to 0.  This allows the
same elimination of statement dependencies, but delays the actual statement
removal from the IL until the next time DCE is run and they are detected
as dead statements with no uses.

References as_a(), bitmap_clear_first_set_bit(), bitmap_empty_p(), bitmap_set_bit, build_zero_cst(), cfun, dump_file, dump_flags, dyn_cast(), FOR_EACH_IMM_USE_FAST, FOR_EACH_PHI_OR_STMT_USE, gimple_bb(), gimple_build_assign(), gimple_call_set_lhs(), gimple_has_side_effects(), gimple_phi_num_args(), gsi_for_stmt(), gsi_remove(), gsi_replace(), has_zero_uses(), i, is_a(), is_gimple_debug(), need_eh_cleanup, NULL_TREE, print_gimple_stmt(), release_defs(), release_ssa_name(), remove_phi_node(), reset_flow_sensitive_info(), SET_PHI_ARG_DEF, single_ssa_def_operand(), ssa_name, SSA_NAME_DEF_STMT, SSA_NAME_IS_DEFAULT_DEF, SSA_NAME_VERSION, SSA_OP_ALL_DEFS, SSA_OP_USE, statistics_counter_event(), stmt_could_throw_p(), stmt_unremovable_because_of_non_call_eh_p(), TDF_DETAILS, TREE_CODE, TREE_TYPE, unlink_stmt_vdef(), update_stmt(), USE_FROM_PTR, USE_STMT, and worklist.

Referenced by analyze_candidates_and_replace(), execute_fixup_cfg(), remove_unreachable::handle_early(), tree_loop_interchange::interchange(), object_sizes_execute(), remove_unreachable::remove_and_update_globals(), replace_phi_edge_with_variable(), substitute_and_fold_engine::substitute_and_fold(), tree_lower_complex(), and scc_copy_prop::~scc_copy_prop().

Functions

Function Documentation

◆ simple_dce_from_worklist()