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reload1.c (merge_assigned_reloads): Can merge RELOAD_FOR_INPUT_ADDRESS and RELOAD_FOR_OTHER_ADDRESS even if...

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* reload1.c (merge_assigned_reloads):  Can merge
	RELOAD_FOR_INPUT_ADDRESS and RELOAD_FOR_OTHER_ADDRESS even
	if RELOAD_FOR_INPUT with the same reload_reg_rtx is present.

From-SVN: r19706
This commit is contained in:
J"orn Rennecke 1998-05-13 00:53:59 +00:00 committed by Joern Rennecke
parent 6eb3bb273d
commit d668e863c9
2 changed files with 33 additions and 5 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Wed May 13 08:52:08 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* reload1.c (merge_assigned_reloads): Can merge
RELOAD_FOR_INPUT_ADDRESS and RELOAD_FOR_OTHER_ADDRESS even
if RELOAD_FOR_INPUT with the same reload_reg_rtx is present.
Tue May 12 20:05:57 1998 Jim Wilson <wilson@cygnus.com>
* collect2.c (main): Ignore do_collecting when COLLECT_EXPORT_LIST.

32
gcc/reload1.c
View File

@ -5899,6 +5899,10 @@ merge_assigned_reloads (insn)
for (i = 0; i < n_reloads; i++)
{
int conflicting_input = 0;
int max_input_address_opnum = -1;
int min_conflicting_input_opnum = MAX_RECOG_OPERANDS;
if (reload_in[i] == 0 || reload_when_needed[i] == RELOAD_OTHER
|| reload_out[i] != 0 || reload_reg_rtx[i] == 0
|| reg_set_p (reload_reg_rtx[i], insn))
@ -5917,24 +5921,42 @@ merge_assigned_reloads (insn)
reload_reg_rtx[i]))
continue;
if (reload_when_needed[j] == RELOAD_FOR_INPUT_ADDRESS
&& reload_opnum[j] > max_input_address_opnum)
max_input_address_opnum = reload_opnum[j];
/* If the reload regs aren't exactly the same (e.g, different modes)
or if the values are different, we can't merge anything with this
reload register. */
or if the values are different, we can't merge this reload.
But if it is an input reload, we might still merge
RELOAD_FOR_INPUT_ADDRESS and RELOAD_FOR_OTHER_ADDRESS reloads. */
if (! rtx_equal_p (reload_reg_rtx[i], reload_reg_rtx[j])
|| reload_out[j] != 0 || reload_in[j] == 0
|| ! rtx_equal_p (reload_in[i], reload_in[j]))
break;
{
if (reload_when_needed[j] != RELOAD_FOR_INPUT
|| ((reload_when_needed[i] != RELOAD_FOR_INPUT_ADDRESS
|| reload_opnum[i] > reload_opnum[j])
&& reload_when_needed[i] != RELOAD_FOR_OTHER_ADDRESS))
break;
conflicting_input = 1;
if (min_conflicting_input_opnum > reload_opnum[j])
min_conflicting_input_opnum = reload_opnum[j];
}
}
/* If all is OK, merge the reloads. Only set this to RELOAD_OTHER if
we, in fact, found any matching reloads. */
if (j == n_reloads)
if (j == n_reloads
&& max_input_address_opnum <= min_conflicting_input_opnum)
{
for (j = 0; j < n_reloads; j++)
if (i != j && reload_reg_rtx[j] != 0
&& rtx_equal_p (reload_reg_rtx[i], reload_reg_rtx[j]))
&& rtx_equal_p (reload_reg_rtx[i], reload_reg_rtx[j])
&& (! conflicting_input
|| reload_when_needed[j] == RELOAD_FOR_INPUT_ADDRESS
|| reload_when_needed[j] == RELOAD_FOR_OTHER_ADDRESS))
{
reload_when_needed[i] = RELOAD_OTHER;
reload_in[j] = 0;