rtl.h (rtvec_all_equal_p): Declare.

gcc/
	* rtl.h (rtvec_all_equal_p): Declare.
	(const_vec_duplicate_p, unwrap_const_vec_duplicate): New functions.
	* rtl.c (rtvec_all_equal_p): New function.
	* expmed.c (expand_mult): Use unwrap_const_vec_duplicate.
	* config/aarch64/aarch64.c (aarch64_vect_float_const_representable_p)
	(aarch64_simd_dup_constant): Use const_vec_duplicate_p.
	* config/arm/arm.c (neon_vdup_constant): Likewise.
	* config/s390/s390.c (s390_contiguous_bitmask_vector_p): Likewise.
	* config/tilegx/constraints.md (W, Y): Likewise.
	* config/tilepro/constraints.md (W, Y): Likewise.
	* config/spu/spu.c (spu_legitimate_constant_p): Likewise.
	(classify_immediate): Use unwrap_const_vec_duplicate.
	* config/tilepro/predicates.md (reg_or_v4s8bit_operand): Likewise.
	(reg_or_v2s8bit_operand): Likewise.
	* config/tilegx/predicates.md (reg_or_v8s8bit_operand): Likewise.
	(reg_or_v4s8bit_operand): Likewise.

From-SVN: r227041

1 files changed, 36 insertions, 0 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index 5e02397..ac56133 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -2678,6 +2678,42 @@ extern unsigned int rtx_size (const_rtx);
 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
 extern int rtx_equal_p (const_rtx, const_rtx);
+extern bool rtvec_all_equal_p (const_rtvec);
+
+/* Return true if X is a vector constant with a duplicated element value.  */
+
+inline bool
+const_vec_duplicate_p (const_rtx x)
+{
+  return GET_CODE (x) == CONST_VECTOR && rtvec_all_equal_p (XVEC (x, 0));
+}
+
+/* Return true if X is a vector constant with a duplicated element value.
+   Store the duplicated element in *ELT if so.  */
+
+template <typename T>
+inline bool
+const_vec_duplicate_p (T x, T *elt)
+{
+  if (const_vec_duplicate_p (x))
+    {
+      *elt = CONST_VECTOR_ELT (x, 0);
+      return true;
+    }
+  return false;
+}
+
+/* If X is a vector constant with a duplicated element value, return that
+   element value, otherwise return X.  */
+
+template <typename T>
+inline T
+unwrap_const_vec_duplicate (T x)
+{
+  if (const_vec_duplicate_p (x))
+    x = CONST_VECTOR_ELT (x, 0);
+  return x;
+}
 
 /* In emit-rtl.c */
 extern rtvec gen_rtvec_v (int, rtx *);