+2003-07-14 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
+
+ PR optimization/11440
+ * gcse.c (try_replace_reg): Don't attach notes to ZERO_EXTRACT or
+ SIGN_EXTRACT SETs.
+
2003-07-14 Alan Modra <amodra@bigpond.net.au>
* doc/tm.texi (BLOCK_REG_PADDING): Describe.
&& validate_change (insn, &SET_SRC (set), src, 0))
success = 1;
- /* If we've failed to do replacement, have a single SET, and don't already
- have a note, add a REG_EQUAL note to not lose information. */
- if (!success && note == 0 && set != 0)
+ /* If we've failed to do replacement, have a single SET, don't already
+ have a note, and have no special SET, add a REG_EQUAL note to not
+ lose information. */
+ if (!success && note == 0 && set != 0
+ && GET_CODE (XEXP (set, 0)) != ZERO_EXTRACT
+ && GET_CODE (XEXP (set, 0)) != SIGN_EXTRACT)
note = set_unique_reg_note (insn, REG_EQUAL, copy_rtx (src));
}