+Fri Aug 4 11:43:49 2000 John Wehle (john@feith.com)
+
+ * combine.c (recog_for_combine): Remove the old notes
+ prior to attempting to recognize the new pattern.
+ (distribute_notes): Ignore REG_NONNEG notes.
+
2000-08-04 Chandrakala Chavva <cchavva@redhat.com>
* varasm.c (output_constructor): Add .align 0 for packed vars.
int num_clobbers_to_add = 0;
int i;
rtx notes = 0;
+ rtx old_notes;
/* If PAT is a PARALLEL, check to see if it contains the CLOBBER
we use to indicate that something didn't match. If we find such a
&& XEXP (XVECEXP (pat, 0, i), 0) == const0_rtx)
return -1;
+ /* Remove the old notes prior to trying to recognize the new pattern. */
+ old_notes = REG_NOTES (insn);
+ REG_NOTES (insn) = 0;
+
/* Is the result of combination a valid instruction? */
insn_code_number = recog (pat, insn, &num_clobbers_to_add);
insn_code_number = recog (pat, insn, &num_clobbers_to_add);
}
+ REG_NOTES (insn) = old_notes;
+
/* If we had any clobbers to add, make a new pattern than contains
them. Then check to make sure that all of them are dead. */
if (num_clobbers_to_add)
case REG_EQUAL:
case REG_EQUIV:
- case REG_NONNEG:
case REG_NOALIAS:
/* These notes say something about results of an insn. We can
only support them if they used to be on I3 in which case they
}
break;
+ case REG_NONNEG:
case REG_WAS_0:
- /* It is too much trouble to try to see if this note is still
- correct in all situations. It is better to simply delete it. */
+ /* These notes say something about the value of a register prior
+ to the execution of an insn. It is too much trouble to see
+ if the note is still correct in all situations. It is better
+ to simply delete it. */
break;
case REG_RETVAL: