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ira-conflicts.c (process_regs_for_copy): Check that the hard regno is in the right range.

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2008-09-09  Vladimir Makarov  <vmakarov@redhat.com>

	* ira-conflicts.c (process_regs_for_copy): Check that the hard
	regno is in the right range.  Add comments.

From-SVN: r140159
This commit is contained in:
Vladimir Makarov 2008-09-09 16:52:55 +00:00 committed by Vladimir Makarov
parent 1f57487cf0
commit 496071caa6
2 changed files with 16 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-09-09 Vladimir Makarov <vmakarov@redhat.com>
* ira-conflicts.c (process_regs_for_copy): Check that the hard
regno is in the right range. Add comments.
2008-09-09 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
* Makefile.in (mips-tfile.o-warn): Don't error out on mips-tfile.c

16
gcc/ira-conflicts.c
View File

@ -331,7 +331,7 @@ go_through_subreg (rtx x, int *offset)
static bool
process_regs_for_copy (rtx reg1, rtx reg2, rtx insn, int freq)
{
int hard_regno, cost, index, offset1, offset2;
int allocno_preferenced_hard_regno, cost, index, offset1, offset2;
bool only_regs_p;
ira_allocno_t a;
enum reg_class rclass, cover_class;
@ -342,16 +342,18 @@ process_regs_for_copy (rtx reg1, rtx reg2, rtx insn, int freq)
only_regs_p = REG_P (reg1) && REG_P (reg2);
reg1 = go_through_subreg (reg1, &offset1);
reg2 = go_through_subreg (reg2, &offset2);
/* Set up hard regno preferenced by allocno. If allocno gets the
hard regno the copy (or potential move) insn will be removed. */
if (HARD_REGISTER_P (reg1))
{
if (HARD_REGISTER_P (reg2))
return false;
hard_regno = REGNO (reg1) + offset1 - offset2;
allocno_preferenced_hard_regno = REGNO (reg1) + offset1 - offset2;
a = ira_curr_regno_allocno_map[REGNO (reg2)];
}
else if (HARD_REGISTER_P (reg2))
{
hard_regno = REGNO (reg2) + offset2 - offset1;
allocno_preferenced_hard_regno = REGNO (reg2) + offset2 - offset1;
a = ira_curr_regno_allocno_map[REGNO (reg1)];
}
else if (!CONFLICT_ALLOCNO_P (ira_curr_regno_allocno_map[REGNO (reg1)],
@ -366,7 +368,10 @@ process_regs_for_copy (rtx reg1, rtx reg2, rtx insn, int freq)
}
else
return false;
rclass = REGNO_REG_CLASS (hard_regno);
if (! IN_RANGE (allocno_preferenced_hard_regno, 0, FIRST_PSEUDO_REGISTER - 1))
/* Can not be tied. */
return false;
rclass = REGNO_REG_CLASS (allocno_preferenced_hard_regno);
mode = ALLOCNO_MODE (a);
cover_class = ALLOCNO_COVER_CLASS (a);
if (! ira_class_subset_p[rclass][cover_class])
@ -375,8 +380,9 @@ process_regs_for_copy (rtx reg1, rtx reg2, rtx insn, int freq)
&& reg_class_size[rclass] <= (unsigned) CLASS_MAX_NREGS (rclass, mode))
/* It is already taken into account in ira-costs.c. */
return false;
index = ira_class_hard_reg_index[cover_class][hard_regno];
index = ira_class_hard_reg_index[cover_class][allocno_preferenced_hard_regno];
if (index < 0)
/* Can not be tied. It is not in the cover class. */
return false;
if (HARD_REGISTER_P (reg1))
cost = ira_register_move_cost[mode][cover_class][rclass] * freq;