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flow.c (new_insn_dead_notes): Use sets_reg_or_subreg not mark_set_resources.

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* flow.c (new_insn_dead_notes): Use sets_reg_or_subreg not
        mark_set_resources.

From-SVN: r28990
This commit is contained in:
Richard Henderson 1999-08-30 16:08:14 -07:00 committed by Richard Henderson
parent 2e419d0961
commit 963d441197
2 changed files with 13 additions and 10 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Mon Aug 30 16:07:49 1999 Richard Henderson <rth@cygnus.com>
* flow.c (new_insn_dead_notes): Use sets_reg_or_subreg not
mark_set_resources.
Mon Aug 30 16:36:33 1999 Jeffrey A Law (law@cygnus.com)
* invoke.texi: Fix typo.

18
gcc/flow.c
View File

@ -132,7 +132,6 @@ Boston, MA 02111-1307, USA. */
#include "toplev.h"
#include "recog.h"
#include "insn-flags.h"
#include "resource.h"
#include "obstack.h"
#define obstack_chunk_alloc xmalloc
@ -5371,6 +5370,7 @@ new_insn_dead_notes (pat, insn, first, last, orig_first_insn, orig_last_insn)
if (tem == orig_last_insn)
break;
}
/* So it's a new register, presumably only used within this
group of insns. Find the last insn in the set of new insns
that DEST is referenced in, and add a dead note to it. */
@ -5393,17 +5393,13 @@ new_insn_dead_notes (pat, insn, first, last, orig_first_insn, orig_last_insn)
}
else
{
struct resources res;
rtx curr;
int got_set = 0;
CLEAR_RESOURCE (&res);
for (curr = orig_first_insn;
curr != NULL_RTX;
curr = NEXT_INSN (curr))
for (curr = orig_first_insn; curr; curr = NEXT_INSN (curr))
{
if (GET_RTX_CLASS (GET_CODE (curr)) == 'i')
mark_set_resources (PATTERN (curr), &res, 0, 0);
if (TEST_HARD_REG_BIT (res.regs, REGNO (dest)))
got_set = sets_reg_or_subreg (curr, dest);
if (got_set)
break;
if (curr == orig_last_insn)
break;
@ -5411,7 +5407,7 @@ new_insn_dead_notes (pat, insn, first, last, orig_first_insn, orig_last_insn)
/* In case reg was not used later, it is dead store.
add REG_UNUSED note. */
if (! TEST_HARD_REG_BIT (res.regs, REGNO (dest)))
if (! got_set)
{
rtx note = rtx_alloc (EXPR_LIST);
PUT_REG_NOTE_KIND (note, REG_UNUSED);
@ -5422,9 +5418,11 @@ new_insn_dead_notes (pat, insn, first, last, orig_first_insn, orig_last_insn)
}
}
}
if (insn != first)
{
rtx set = single_set (insn);
/* If this is a set, scan backwards for a previous
reference, and attach a REG_DEAD note to it. But we don't
want to do it if the insn is both using and setting the