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reload.c (find_reloads): Revert code to penalize small register classes that was brought in with the IRA... 

* reload.c (find_reloads): Revert code to penalize small register
	classes that was brought in with the IRA merge.

From-SVN: r162176
This commit is contained in:
Bernd Schmidt 2010-07-14 11:07:17 +00:00 committed by Bernd Schmidt
parent 2bd6311dbb
commit b1c8622e95
2 changed files with 6 additions and 24 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2010-07-14 Bernd Schmidt <bernds@codesourcery.com>
* reload.c (find_reloads): Revert code to penalize small register
classes that was brought in with the IRA merge.
2010-07-14 Richard Guenther <rguenther@suse.de>
* tree-ssa-ccp.c (fold_const_aggregate_ref): Handle MEM_REF

25
gcc/reload.c
View File

@ -2602,7 +2602,6 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
char goal_alternative_earlyclobber[MAX_RECOG_OPERANDS];
int goal_alternative_swapped;
int best;
int best_small_class_operands_num;
int commutative;
char operands_match[MAX_RECOG_OPERANDS][MAX_RECOG_OPERANDS];
rtx substed_operand[MAX_RECOG_OPERANDS];
@ -2928,7 +2927,6 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
all the operands together against the register constraints. */
best = MAX_RECOG_OPERANDS * 2 + 600;
best_small_class_operands_num = 0;
swapped = 0;
goal_alternative_swapped = 0;
@ -3715,27 +3713,7 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
record it as the chosen goal for reloading. */
if (! bad)
{
bool change_p = false;
int small_class_operands_num = 0;
if (best >= losers)
{
for (i = 0; i < noperands; i++)
small_class_operands_num
+= SMALL_REGISTER_CLASS_P (this_alternative[i]) ? 1 : 0;
if (best > losers
|| (best == losers
/* If the cost of the reloads is the same,
prefer alternative which requires minimal
number of small register classes for the
operands. This improves chances of reloads
for insn requiring small register
classes. */
&& (small_class_operands_num
< best_small_class_operands_num)))
change_p = true;
}
if (change_p)
if (best > losers)
{
for (i = 0; i < noperands; i++)
{
@ -3751,7 +3729,6 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
}
goal_alternative_swapped = swapped;
best = losers;
best_small_class_operands_num = small_class_operands_num;
goal_alternative_number = this_alternative_number;
goal_earlyclobber = this_earlyclobber;
}