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unroll.c (copy_loop_body): Remove REG_EQUAL note attached to copied instruction if... 

* unroll.c (copy_loop_body): Remove REG_EQUAL note attached to
        copied instruction if the note is not loop invariant.

From-SVN: r57834
This commit is contained in:
David Edelsohn 2002-10-05 04:06:17 +00:00 committed by David Edelsohn
parent 081d6fb956
commit f7a21c70b1
2 changed files with 12 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-10-04 David Edelsohn <edelsohn@gnu.org>
* unroll.c (copy_loop_body): Remove REG_EQUAL note attached to
copied instruction if the note is not loop invariant.
2002-10-04 Loren J. Rittle <ljrittle@acm.org>
* gcc/ginclude/stddef.h: Support the FreeBSD 5 typedef system.

7
gcc/unroll.c
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@ -2033,6 +2033,13 @@ copy_loop_body (loop, copy_start, copy_end, map, exit_label, last_iteration,
REG_NOTES (copy) = initial_reg_note_copy (REG_NOTES (insn), map);
INSN_SCOPE (copy) = INSN_SCOPE (insn);
/* If there is a REG_EQUAL note present whose value
is not loop invariant, then delete it, since it
may cause problems with later optimization passes. */
if ((tem = find_reg_note (copy, REG_EQUAL, NULL_RTX))
&& !loop_invariant_p (loop, XEXP (tem, 0)))
remove_note (copy, tem);
#ifdef HAVE_cc0
/* If this insn is setting CC0, it may need to look at
the insn that uses CC0 to see what type of insn it is.