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| author | David Edelsohn <edelsohn@gnu.org> | 2002-10-05 04:06:17 +0000 |
|---|---|---|
| committer | David Edelsohn <dje@gcc.gnu.org> | 2002-10-05 00:06:17 -0400 |
| commit | f7a21c70b19653e62fe2fa606e15f7c187db56e1 (patch) | |
| tree | 3f0ddf460aba7b63916a785d2153b6c8afca5dba /gcc/unroll.c | |
| parent | 081d6fb9561010943ab28cfe8a30d291a835742c (diff) | |
| download | gcc-f7a21c70b19653e62fe2fa606e15f7c187db56e1.zip gcc-f7a21c70b19653e62fe2fa606e15f7c187db56e1.tar.gz gcc-f7a21c70b19653e62fe2fa606e15f7c187db56e1.tar.bz2 | |
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
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 97e646e..3e5ea7f 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -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. |