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tree-outof-ssa.c (coalesce_ssa_name): Use coalesce_cost.

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* tree-outof-ssa.c (coalesce_ssa_name): Use coalesce_cost.
	(coalesce_vars): Likewise.
	* tree-ssa-live.c (coalesce_cost): New.
	(build_tree_conflict_graph): Use coalesce_cost.
	* tree-ssa-live.h (coalesce_cost): Declare.

From-SVN: r102593
This commit is contained in:
Jan Hubicka 2005-07-31 00:14:17 +02:00 committed by Jan Hubicka
parent ee25d4cbe3
commit 0bde02b339
4 changed files with 51 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2005-07-31 Jan Hubicka <jh@suse.cz>
* tree-outof-ssa.c (coalesce_ssa_name): Use coalesce_cost.
(coalesce_vars): Likewise.
* tree-ssa-live.c (coalesce_cost): New.
(build_tree_conflict_graph): Use coalesce_cost.
* tree-ssa-live.h (coalesce_cost): Declare.
2005-07-30 Richard Earnshaw <richard.earnshaw@arm.com>
* arm.md (all peepholes for post-increment operations): Delete.

22
gcc/tree-outof-ssa.c
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@ -729,7 +729,13 @@ coalesce_ssa_name (var_map map, int flags)
continue;
p2 = var_to_partition (map, PHI_ARG_DEF (phi, x));
if (p2 != NO_PARTITION)
add_coalesce (cl, p, p2, 1);
{
edge e = PHI_ARG_EDGE (phi, x);
add_coalesce (cl, p, p2,
coalesce_cost (EDGE_FREQUENCY (e),
maybe_hot_bb_p (bb),
EDGE_CRITICAL_P (e)));
}
}
}
}
@ -748,7 +754,10 @@ coalesce_ssa_name (var_map map, int flags)
i = x;
}
else
add_coalesce (cl, i, x, 1);
add_coalesce (cl, i, x,
coalesce_cost (EXIT_BLOCK_PTR->frequency,
maybe_hot_bb_p (EXIT_BLOCK_PTR),
false));
}
}
@ -1097,7 +1106,14 @@ coalesce_vars (var_map map, tree_live_info_p liveinfo)
if (p2 == (unsigned)NO_PARTITION)
continue;
if (p != p2)
add_coalesce (cl, p, p2, 1);
{
edge e = PHI_ARG_EDGE (phi, x);
add_coalesce (cl, p, p2,
coalesce_cost (EDGE_FREQUENCY (e),
maybe_hot_bb_p (bb),
EDGE_CRITICAL_P (e)));
}
}
}
}

25
gcc/tree-ssa-live.c
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@ -1145,11 +1145,30 @@ find_partition_pair (coalesce_list_p cl, int p1, int p2, bool create)
return node;
}
/* Return cost of execution of copy instruction with FREQUENCY
possibly on CRITICAL edge and in HOT basic block. */
int
coalesce_cost (int frequency, bool hot, bool critical)
{
/* Base costs on BB frequencies bounded by 1. */
int cost = frequency;
if (!cost)
cost = 1;
if (optimize_size || hot)
cost = 1;
/* Inserting copy on critical edge costs more
than inserting it elsewhere. */
if (critical)
cost *= 2;
return cost;
}
/* Add a potential coalesce between P1 and P2 in CL with a cost of VALUE. */
void
add_coalesce (coalesce_list_p cl, int p1, int p2, int value)
add_coalesce (coalesce_list_p cl, int p1, int p2,
int value)
{
partition_pair_p node;
@ -1383,7 +1402,9 @@ build_tree_conflict_graph (tree_live_info_p liveinfo, tpa_p tpa,
if (bit)
bitmap_set_bit (live, p2);
if (cl)
add_coalesce (cl, p1, p2, 1);
add_coalesce (cl, p1, p2,
coalesce_cost (bb->frequency,
maybe_hot_bb_p (bb), false));
set_if_valid (map, live, rhs);
}
}

1
gcc/tree-ssa-live.h
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@ -700,6 +700,7 @@ typedef struct coalesce_list_d
extern coalesce_list_p create_coalesce_list (var_map);
extern void add_coalesce (coalesce_list_p, int, int, int);
extern int coalesce_cost (int, bool, bool);
extern void sort_coalesce_list (coalesce_list_p);
extern void dump_coalesce_list (FILE *, coalesce_list_p);
extern void delete_coalesce_list (coalesce_list_p);