Wed Dec 24 23:12:14 1997 Jim Wilson <wilson@cygnus.com>
+ * cse.c (max_insn_uid): New variable.
+ (invalidate): Remove CYGNUS LOCAL patch.
+ (cse_around_loop): Use max_insn_uid.
+ (cse_main): Set max_insn_uid.
+
* abi64.h (LONG_MAX_SPEC): Check MIPS_ABI_DEFAULT and TARGET_DEFAULT,
and define __LONG_MAX__ appropriately. Add support for -mabi=X,
-mlong64, and -mgp{32,64} options.
static int max_reg;
+/* One plus largest instruction UID used in this function at time of
+ cse_main call. */
+
+static int max_insn_uid;
+
/* Length of vectors indexed by quantity number.
We know in advance we will not need a quantity number this big. */
The only thing we do with SET_DEST is invalidate entries, so we
can safely process each SET in order. It is slightly less efficient
- to do so, but we only want to handle the most common cases. */
+ to do so, but we only want to handle the most common cases.
+
+ The gen_move_insn call in cse_set_around_loop may create new pseudos.
+ These pseudos won't have valid entries in any of the tables indexed
+ by register number, such as reg_qty. We avoid out-of-range array
+ accesses by not processing any instructions created after cse started. */
for (insn = NEXT_INSN (loop_start);
GET_CODE (insn) != CALL_INSN && GET_CODE (insn) != CODE_LABEL
+ && INSN_UID (insn) < max_insn_uid
&& ! (GET_CODE (insn) == NOTE
&& NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END);
insn = NEXT_INSN (insn))
max_reg = nregs;
+ max_insn_uid = get_max_uid ();
+
all_minus_one = (int *) alloca (nregs * sizeof (int));
consec_ints = (int *) alloca (nregs * sizeof (int));