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flow.c (update_life_info): Allocate reg_deaths when called from scheudler.

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* flow.c (update_life_info): Allocate reg_deaths when called from
	scheudler.
	(attempt_auto_inc):  Update life ranges accordingly.

From-SVN: r77415
This commit is contained in:
Jan Hubicka 2004-02-06 20:29:56 +01:00 committed by Jan Hubicka
parent fbdf188d78
commit 298c28a8f4
2 changed files with 24 additions and 8 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-02-06 Jan Hubicka <jh@suse.cz>
* flow.c (update_life_info): Allocate reg_deaths when called from
scheudler.
(attempt_auto_inc): Update life ranges accordingly.
2004-02-06 Ulrich Weigand <uweigand@de.ibm.com>
PR debug/11816

26
gcc/flow.c
View File

@ -627,6 +627,9 @@ update_life_info (sbitmap blocks, enum update_life_extent extent, int prop_flags
tmp = INITIALIZE_REG_SET (tmp_head);
ndead = 0;
if ((prop_flags & PROP_REG_INFO) && !reg_deaths)
reg_deaths = xcalloc (sizeof (*reg_deaths), max_regno);
timevar_push ((extent == UPDATE_LIFE_LOCAL || blocks)
? TV_LIFE_UPDATE : TV_LIFE);
@ -3376,16 +3379,16 @@ attempt_auto_inc (struct propagate_block_info *pbi, rtx inc, rtx insn,
incr_reg = q;
regno = REGNO (q);
if ((pbi->flags & PROP_REG_INFO)
&& !REGNO_REG_SET_P (pbi->reg_live, regno))
reg_deaths[regno] = pbi->insn_num;
/* REGNO is now used in INCR which is below INSN, but
it previously wasn't live here. If we don't mark
it as live, we'll put a REG_DEAD note for it
on this insn, which is incorrect. */
SET_REGNO_REG_SET (pbi->reg_live, regno);
/* We shall not do the autoinc during final pass. */
if (flags & PROP_REG_INFO)
abort ();
/* If there are any calls between INSN and INCR, show
that REGNO now crosses them. */
for (temp = insn; temp != incr; temp = NEXT_INSN (temp))
@ -3417,14 +3420,21 @@ attempt_auto_inc (struct propagate_block_info *pbi, rtx inc, rtx insn,
/* If the original source was dead, it's dead now. */
rtx note;
/* We shall not do the autoinc during final pass. */
if (flags & PROP_REG_INFO)
abort ();
while ((note = find_reg_note (incr, REG_DEAD, NULL_RTX)) != NULL_RTX)
{
remove_note (incr, note);
if (XEXP (note, 0) != incr_reg)
CLEAR_REGNO_REG_SET (pbi->reg_live, REGNO (XEXP (note, 0)));
{
unsigned int regno = REGNO (XEXP (note, 0));
if ((pbi->flags & PROP_REG_INFO)
&& REGNO_REG_SET_P (pbi->reg_live, regno))
{
REG_LIVE_LENGTH (regno) += pbi->insn_num - reg_deaths[regno];
reg_deaths[regno] = 0;
}
CLEAR_REGNO_REG_SET (pbi->reg_live, REGNO (XEXP (note, 0)));
}
}
PUT_CODE (incr, NOTE);