[SPARC] Simplify const_all_ones_operand

gen_rtx_CONST_VECTOR ensures that there is a single instance of:

       (const_vector:M [(const_int -1) ... (const_int -1)])

for each M, so pointer equality with CONSTM1_RTX is enough.  Also,
HOST_BITS_PER_WIDE_INT == 32 is doubly dead: HOST_WIDE_INT is always
64 bits now, and we always use const_int rather than const_double
or const_wide_int for all-ones values (or any other value that
fits in a signed HOST_WIDE_INT).

gcc/
	* config/sparc/predicates.md (const_all_ones_operand): Use
	CONSTM1_RTX to simplify definition.

From-SVN: r227757

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fa20d73dd3aeb22514ff34172cf85e3989a6998c..e305c1e3ed4497363c49cabd183400975cee44ea 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-09-14  Richard Sandiford  <richard.sandiford@arm.com>
+
+       * config/sparc/predicates.md (const_all_ones_operand): Use
+       CONSTM1_RTX to simplify definition.
+
 2015-09-14  Oleg Endo  <olegendo@gcc.gnu.org>
 
        PR target/67061

diff --git a/gcc/config/sparc/predicates.md b/gcc/config/sparc/predicates.md
index 88537c64f0cb961c840cc10226d551bbbe0f4922..aa45f8ec66f446cd2bb9183a4137e0b9edd3c945 100644 (file)
--- a/gcc/config/sparc/predicates.md
+++ b/gcc/config/sparc/predicates.md
@@ -27,31 +27,9 @@
 ;; Return true if the integer representation of OP is
 ;; all-ones.
 (define_predicate "const_all_ones_operand"
-  (match_code "const_int,const_double,const_vector")
-{
-  if (GET_CODE (op) == CONST_INT && INTVAL (op) == -1)
-    return true;
-#if HOST_BITS_PER_WIDE_INT == 32
-  if (GET_CODE (op) == CONST_DOUBLE
-      && GET_MODE (op) == VOIDmode
-      && CONST_DOUBLE_HIGH (op) == ~(HOST_WIDE_INT)0
-      && CONST_DOUBLE_LOW (op) == ~(HOST_WIDE_INT)0)
-    return true;
-#endif
-  if (GET_CODE (op) == CONST_VECTOR)
-    {
-      int i, num_elem = CONST_VECTOR_NUNITS (op);
-
-      for (i = 0; i < num_elem; i++)
-        {
-          rtx n = CONST_VECTOR_ELT (op, i);
-          if (! const_all_ones_operand (n, mode))
-            return false;
-        }
-      return true;
-    }
-  return false;
-})
+  (and (match_code "const_int,const_double,const_vector")
+       (match_test "INTEGRAL_MODE_P (GET_MODE (op))")
+       (match_test "op == CONSTM1_RTX (GET_MODE (op))")))
 
 ;; Return true if OP is the integer constant 4096.
 (define_predicate "const_4096_operand"