tree-ssa-dse.h File Reference

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Enumerations
enum	dse_store_status { DSE_STORE_LIVE , DSE_STORE_MAYBE_PARTIAL_DEAD , DSE_STORE_DEAD }

Functions
dse_store_status	dse_classify_store (ao_ref *, gimple *, bool, sbitmap, bool *=NULL, tree=NULL)
void	delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *, bitmap=NULL, bitmap=NULL)

Enumeration Type Documentation

dse_store_status

enum dse_store_status

Support routines for dead store elimination. 
   Copyright (C) 2019-2024 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/>.   

Return value from dse_classify_store  

Enumerator
DSE_STORE_LIVE
DSE_STORE_MAYBE_PARTIAL_DEAD
DSE_STORE_DEAD

Function Documentation

delete_dead_or_redundant_assignment()

void delete_dead_or_redundant_assignment	(	gimple_stmt_iterator *	gsi,
		const char *	type,
		bitmap	need_eh_cleanup,
		bitmap	need_ab_cleanup )

Delete a dead store at GSI, which is a gimple assignment.  

References bitmap_set_bit, dump_file, dump_flags, ggc_alloc(), gimple_bb(), gsi_remove(), gsi_stmt(), basic_block_def::index, need_ab_cleanup, need_eh_cleanup, print_gimple_stmt(), release_defs(), stmt_can_make_abnormal_goto(), TDF_DETAILS, and unlink_stmt_vdef().

Referenced by dse_optimize_call(), dse_optimize_redundant_stores(), dse_optimize_stmt(), and ifcvt_local_dce().

dse_classify_store()

dse_store_status dse_classify_store	(	ao_ref *	ref,
		gimple *	stmt,
		bool	byte_tracking_enabled,
		sbitmap	live_bytes,
		bool *	by_clobber_p = NULL,
		tree	stop_at_vuse = NULL )

References dse_classify_store(), ggc_alloc(), and visited.