+2004-03-23 Richard Sandiford <rsandifo@redhat.com>
+
+ * gcse.c (can_assign_to_reg_p): New function, split out from...
+ (want_to_gcse_p): ...here.
+ (compute_ld_motion_mems): Use can_assign_to_reg_p to validate
+ the rhs of a store.
+
2004-03-22 Diego Novillo <dnovillo@redhat.com>
* c-typeck.c (same_translation_unit_p): Fix pasto.
static void hash_scan_clobber (rtx, rtx, struct hash_table *);
static void hash_scan_call (rtx, rtx, struct hash_table *);
static int want_to_gcse_p (rtx);
+static bool can_assign_to_reg_p (rtx);
static bool gcse_constant_p (rtx);
static int oprs_unchanged_p (rtx, rtx, int);
static int oprs_anticipatable_p (rtx, rtx);
/* See whether X, the source of a set, is something we want to consider for
GCSE. */
-static GTY(()) rtx test_insn;
static int
want_to_gcse_p (rtx x)
{
- int num_clobbers = 0;
- int icode;
-
switch (GET_CODE (x))
{
case REG:
return 0;
default:
- break;
+ return can_assign_to_reg_p (x);
}
+}
+
+/* Used internally by can_assign_to_reg_p. */
+
+static GTY(()) rtx test_insn;
+
+/* Return true if we can assign X to a pseudo register. */
+
+static bool
+can_assign_to_reg_p (rtx x)
+{
+ int num_clobbers = 0;
+ int icode;
/* If this is a valid operand, we are OK. If it's VOIDmode, we aren't. */
if (general_operand (x, GET_MODE (x)))
&& GET_CODE (src) != ASM_OPERANDS
/* Check for REG manually since want_to_gcse_p
returns 0 for all REGs. */
- && (REG_P (src) || want_to_gcse_p (src)))
+ && can_assign_to_reg_p (src))
ptr->stores = alloc_INSN_LIST (insn, ptr->stores);
else
ptr->invalid = 1;