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| author | dje <dje@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-10-05 04:06:17 +0000 |
|---|---|---|
| committer | dje <dje@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-10-05 04:06:17 +0000 |
| commit | 6d470b777dc74e418c501b730f021381bd010d5a (patch) | |
| tree | 3f0ddf460aba7b63916a785d2153b6c8afca5dba /gcc/unroll.c | |
| parent | 733997eb1ba0d406e937918165a37cbc88a9f0fd (diff) | |
| download | gcc-6d470b777dc74e418c501b730f021381bd010d5a.tar.gz | |
* unroll.c (copy_loop_body): Remove REG_EQUAL note attached to
copied instruction if the note is not loop invariant.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@57834 138bc75d-0d04-0410-961f-82ee72b054a4
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 97e646eb25c..3e5ea7f069a 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. |