8sa1-gcc/gcc/lists.c
Bernd Schmidt e2724e63c6 reg-notes.def (DEP_CONTROL): New.
* reg-notes.def (DEP_CONTROL): New.
	* sched-ebb.c (add_deps_for_risky_insns): Add a REG_DEP_CONTROL when
	not doing speculation.
	* rtlanal.c (record_hard_reg_sets, find_all_hard_reg_sets,
	record_hard_reg_uses_1, record_hard_reg_uses): New functions.
	* function.c (record_hard_reg_sets, record_hard_reg_uses,
	record_hard_reg_uses_1): Remove; move to rtlanal.c.
	* lists.c (copy_INSN_LIST, concat_INSN_LIST): New functions.
	* haifa-sched.c: Swap includes of "rtl.h" and "hard-reg-set.h".
	(MUST_RECOMPUTE_SPEC_P): New macro.
	(real_insn_for_shadow): New function.
	(cond_clobbered_p, recompute_todo_spec, check_clobbered_conditions,
	toggle_cancelled_flags): New static functions.
	(schedule_insn): Relax an assert to only check for empty hard back
	dependencies.  Skip cancelled dependencies.  Call
	check_clobbered_conditions.
	(copy_insn_list): Remove function, renamed moved to lists.c.
	(save_backtrack_point): Use new spelling copy_INSN_LIST.
	(unschedule_insns_until): Ensure TODO_SPEC is reset properly.
	(restore_last_backtrack_point): Likewise.  Call toggle_cancelled_flags.
	(estimate_insn_tick): Ignore cancelled dependencies.
	(haifa_speculate_insn): Move declaration.
	(try_ready): Move code into recompute_todo_spec and call it.  Tweak
	some asserts.  Ensure predicated patterns are restored if necessary.
	Dump DEP_CONTROL flag.
	(haifa_change_pattern): Merge with sched_change_pattern.
	(sched_change_pattern): Remove function.
	* sched-deps.c (NON_FLUSH_JUMP_KIND, NON_FLUSH_JUMP): Remove.  All
	uses changed to simply not test NON_FLUSH_JUMP_P.
	(ds_to_dk, dk_to_ds, dump_dep, ds_to_dt, dump_ds, check_dep): Handle
	REG_DEP_CONTROL.
	(dep_spec_p): If DO_PREDICATION, REG_DEP_CONTROL is speculative.
	(reg_pending_control_uses, control_dependency_cache): New static
	variables.
	(sched_get_reverse_condition_uncached): New function.
	(sd_find_dep_between): Remove pointless assert.  Look in
	control_dependency_cache.
	(ask_dependency_caches, set_dependency_caches, sd_delete_dep,
	extend_dependency_caches, sched_deps_finish): Handle REG_DEP_CONTROL
	and control_dependency_cache.
	(sd_unresolve_dep): Use dep_spec_p.
	(add_dependence): Now a wrapper around add_dependence_1, handling
	REG_DEP_CONTROL specially.
	(flush_pending_lists): Clear pending_jump_insns.
	(sched_analyze_1): Handle pending_jump_insns like a memory flush.
	(sched_analyze_2): Unconditionally add to pending memory flushes,
	keep previous behaviour but apply it to pending_jump_insns instead.
	(sched_analyze_insn): Defer adding jump reg dependencies using
	reg_pending_control_uses; add them to the control_uses list.  Handle
	pending_jump_insns and control_uses when adding dependence lists.
	(deps_analyze_insn): Update INSN_COND_DEPS.
	(deps_analyze_insn): Add jumps to pending_jump_insns rather than
	last_pending_memory_flush.
	(init_deps): Initialize pending_jump_insns.
	(free_deps): Free control_uses.
	(remove_from_deps): Remove from pending_jump_insns.
	(init_deps_global): Allocate reg_pending_control_uses).
	(finish_deps_global): Free it.
	(add_dependence_1): Renamed from add_dependence.  Handle
	REG_DEP_CONTROL.
	* rtl.h (record_hard_reg_uses, find_all_hard_reg_sets): Declare.
	(copy_INSN_LIST, concat_INSN_LIST): Declare.
	* sched-int.h (struct deps_reg): Add control_uses.
	(struct deps_desc): Add pending_jump_insns.
	(struct _haifa_deps_insn_data): Add cond_deps.
	(struct _haifa_insn_data): Add must_recompute_spec and predicated_pat.
	(INSN_COND_DEPS, PREDICATED_PAT): New macros.
	(BITS_PER_DEP_WEAK): Adjust for two extra bits in the word.
	(DEP_CONTROL): New macro.
	(DEP_TYPES): Include it.
	(HARD_DEP): Adjust definition.
	(DEP_CANCELLED): New macro.
	(enum SCHED_FLAGS): Add DO_PREDICATION.
	(sched_get_reverse_condition_uncached, real_insn_for_shadow): Declare.
	* sched-rgn.c (concat_INSN_LIST): Remove function.
	(deps_join): Handle pending_jump_insns.
	(free_pending_lists): Likewise.
	* config/c6x/c6x.c (c6x_set_sched_flags): Set DO_PREDICATION for final
	schedule.

From-SVN: r180302
2011-10-21 13:35:44 +00:00

250 lines
5.9 KiB
C

/* List management for the GCC expander.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "diagnostic-core.h"
#include "rtl.h"
#include "ggc.h"
static void free_list (rtx *, rtx *);
/* Functions for maintaining cache-able lists of EXPR_LIST and INSN_LISTs. */
/* An INSN_LIST containing all INSN_LISTs allocated but currently unused. */
static GTY ((deletable)) rtx unused_insn_list;
/* An EXPR_LIST containing all EXPR_LISTs allocated but currently unused. */
static GTY ((deletable)) rtx unused_expr_list;
/* This function will free an entire list of either EXPR_LIST, INSN_LIST
or DEPS_LIST nodes. This is to be used only on lists that consist
exclusively of nodes of one type only. This is only called by
free_EXPR_LIST_list, free_INSN_LIST_list and free_DEPS_LIST_list. */
static void
free_list (rtx *listp, rtx *unused_listp)
{
rtx link, prev_link;
prev_link = *listp;
link = XEXP (prev_link, 1);
gcc_assert (unused_listp != &unused_insn_list
|| GET_CODE (prev_link) == INSN_LIST);
while (link)
{
gcc_assert (unused_listp != &unused_insn_list
|| GET_CODE (prev_link) == INSN_LIST);
prev_link = link;
link = XEXP (link, 1);
}
XEXP (prev_link, 1) = *unused_listp;
*unused_listp = *listp;
*listp = 0;
}
/* Find corresponding to ELEM node in the list pointed to by LISTP.
This node must exist in the list. Returns pointer to that node. */
static rtx *
find_list_elem (rtx elem, rtx *listp)
{
while (XEXP (*listp, 0) != elem)
listp = &XEXP (*listp, 1);
return listp;
}
/* Remove the node pointed to by LISTP from the list. */
static void
remove_list_node (rtx *listp)
{
rtx node;
node = *listp;
*listp = XEXP (node, 1);
XEXP (node, 1) = 0;
}
/* Removes corresponding to ELEM node from the list pointed to by LISTP.
Returns that node. */
rtx
remove_list_elem (rtx elem, rtx *listp)
{
rtx node;
listp = find_list_elem (elem, listp);
node = *listp;
remove_list_node (listp);
return node;
}
/* This call is used in place of a gen_rtx_INSN_LIST. If there is a cached
node available, we'll use it, otherwise a call to gen_rtx_INSN_LIST
is made. */
rtx
alloc_INSN_LIST (rtx val, rtx next)
{
rtx r;
if (unused_insn_list)
{
r = unused_insn_list;
unused_insn_list = XEXP (r, 1);
XEXP (r, 0) = val;
XEXP (r, 1) = next;
PUT_REG_NOTE_KIND (r, VOIDmode);
gcc_assert (GET_CODE (r) == INSN_LIST);
}
else
r = gen_rtx_INSN_LIST (VOIDmode, val, next);
return r;
}
/* This call is used in place of a gen_rtx_EXPR_LIST. If there is a cached
node available, we'll use it, otherwise a call to gen_rtx_EXPR_LIST
is made. */
rtx
alloc_EXPR_LIST (int kind, rtx val, rtx next)
{
rtx r;
if (unused_expr_list)
{
r = unused_expr_list;
unused_expr_list = XEXP (r, 1);
XEXP (r, 0) = val;
XEXP (r, 1) = next;
PUT_REG_NOTE_KIND (r, kind);
}
else
r = gen_rtx_EXPR_LIST ((enum machine_mode) kind, val, next);
return r;
}
/* This function will free up an entire list of EXPR_LIST nodes. */
void
free_EXPR_LIST_list (rtx *listp)
{
if (*listp == 0)
return;
free_list (listp, &unused_expr_list);
}
/* This function will free up an entire list of INSN_LIST nodes. */
void
free_INSN_LIST_list (rtx *listp)
{
if (*listp == 0)
return;
free_list (listp, &unused_insn_list);
}
/* Make a copy of the INSN_LIST list LINK and return it. */
rtx
copy_INSN_LIST (rtx link)
{
rtx new_queue;
rtx *pqueue = &new_queue;
for (; link; link = XEXP (link, 1))
{
rtx x = XEXP (link, 0);
rtx newlink = alloc_INSN_LIST (x, NULL);
*pqueue = newlink;
pqueue = &XEXP (newlink, 1);
}
*pqueue = NULL_RTX;
return new_queue;
}
/* Duplicate the INSN_LIST elements of COPY and prepend them to OLD. */
rtx
concat_INSN_LIST (rtx copy, rtx old)
{
rtx new_rtx = old;
for (; copy ; copy = XEXP (copy, 1))
{
new_rtx = alloc_INSN_LIST (XEXP (copy, 0), new_rtx);
PUT_REG_NOTE_KIND (new_rtx, REG_NOTE_KIND (copy));
}
return new_rtx;
}
/* This function will free up an individual EXPR_LIST node. */
void
free_EXPR_LIST_node (rtx ptr)
{
XEXP (ptr, 1) = unused_expr_list;
unused_expr_list = ptr;
}
/* This function will free up an individual INSN_LIST node. */
void
free_INSN_LIST_node (rtx ptr)
{
gcc_assert (GET_CODE (ptr) == INSN_LIST);
XEXP (ptr, 1) = unused_insn_list;
unused_insn_list = ptr;
}
/* Remove and free corresponding to ELEM node in the INSN_LIST pointed to
by LISTP. */
void
remove_free_INSN_LIST_elem (rtx elem, rtx *listp)
{
free_INSN_LIST_node (remove_list_elem (elem, listp));
}
/* Remove and free the first node in the INSN_LIST pointed to by LISTP. */
rtx
remove_free_INSN_LIST_node (rtx *listp)
{
rtx node = *listp;
rtx elem = XEXP (node, 0);
remove_list_node (listp);
free_INSN_LIST_node (node);
return elem;
}
/* Remove and free the first node in the EXPR_LIST pointed to by LISTP. */
rtx
remove_free_EXPR_LIST_node (rtx *listp)
{
rtx node = *listp;
rtx elem = XEXP (node, 0);
remove_list_node (listp);
free_EXPR_LIST_node (node);
return elem;
}
#include "gt-lists.h"