Use builtin_widen_mult_even/odd in tree-vect-generic division expansion

        * tree-vect-generic.c: Include target.h.
        (expand_vector_divmod): Use builtin_mul_widen_even/odd if supported.
        * Makefile.in (tree-vect-generic.o): Update.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@189081 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 69 insertions, 25 deletions

diff --git a/gcc/tree-vect-generic.c b/gcc/tree-vect-generic.c
index c83db5e1e30..89d8bae99c7 100644
--- a/gcc/tree-vect-generic.c
+++ b/gcc/tree-vect-generic.c
@@ -31,6 +31,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "flags.h"
 #include "ggc.h"
 #include "diagnostic.h"
+#include "target.h"
 
 /* Need to include rtl.h, expr.h, etc. for optabs.  */
 #include "expr.h"
@@ -456,7 +457,7 @@ expand_vector_divmod (gimple_stmt_iterator *gsi, tree type, tree op0,
   optab op;
   tree *vec;
   unsigned char *sel = NULL;
-  tree cur_op, mhi, mlo, mulcst, perm_mask, wider_type, tem;
+  tree cur_op, mhi, mlo, mulcst, perm_mask, wider_type, tem, decl_e, decl_o;
 
   if (prec > HOST_BITS_PER_WIDE_INT)
     return NULL_TREE;
@@ -745,32 +746,52 @@ expand_vector_divmod (gimple_stmt_iterator *gsi, tree type, tree op0,
     return NULL_TREE;
 
   op = optab_for_tree_code (MULT_HIGHPART_EXPR, type, optab_default);
-  if (op != NULL
-      && optab_handler (op, TYPE_MODE (type)) != CODE_FOR_nothing)
-    wider_type = NULL_TREE;
+  if (op != NULL && optab_handler (op, TYPE_MODE (type)) != CODE_FOR_nothing)
+    wider_type = decl_e = decl_o = NULL_TREE;
   else
     {
-      op = optab_for_tree_code (VEC_WIDEN_MULT_LO_EXPR, type, optab_default);
-      if (op == NULL
-	  || optab_handler (op, TYPE_MODE (type)) == CODE_FOR_nothing)
-	return NULL_TREE;
-      op = optab_for_tree_code (VEC_WIDEN_MULT_HI_EXPR, type, optab_default);
-      if (op == NULL
-	  || optab_handler (op, TYPE_MODE (type)) == CODE_FOR_nothing)
-	return NULL_TREE;
-      sel = XALLOCAVEC (unsigned char, nunits);
-      for (i = 0; i < nunits; i++)
-	sel[i] = 2 * i + (BYTES_BIG_ENDIAN ? 0 : 1);
-      if (!can_vec_perm_p (TYPE_MODE (type), false, sel))
-	return NULL_TREE;
-      wider_type
-	= build_vector_type (build_nonstandard_integer_type (prec * 2,
-							     unsignedp),
-			     nunits / 2);
+      wider_type = build_nonstandard_integer_type (prec * 2, unsignedp),
+      wider_type = build_vector_type (wider_type, nunits / 2);
       if (GET_MODE_CLASS (TYPE_MODE (wider_type)) != MODE_VECTOR_INT
 	  || GET_MODE_BITSIZE (TYPE_MODE (wider_type))
 	     != GET_MODE_BITSIZE (TYPE_MODE (type)))
 	return NULL_TREE;
+
+      sel = XALLOCAVEC (unsigned char, nunits);
+
+      if (targetm.vectorize.builtin_mul_widen_even
+	  && targetm.vectorize.builtin_mul_widen_odd
+	  && (decl_e = targetm.vectorize.builtin_mul_widen_even (type))
+	  && (decl_o = targetm.vectorize.builtin_mul_widen_odd (type))
+	  && (TYPE_MODE (TREE_TYPE (TREE_TYPE (decl_e)))
+	      == TYPE_MODE (wider_type)))
+	{
+	  for (i = 0; i < nunits; i++)
+	    sel[i] = !BYTES_BIG_ENDIAN + (i & ~1) + ((i & 1) ? nunits : 0);
+	  if (!can_vec_perm_p (TYPE_MODE (wider_type), false, sel))
+	    decl_e = decl_o = NULL_TREE;
+	}
+      else
+	decl_e = decl_o = NULL_TREE;
+
+      if (decl_e == NULL_TREE)
+	{
+	  op = optab_for_tree_code (VEC_WIDEN_MULT_LO_EXPR,
+				    type, optab_default);
+	  if (op == NULL
+	      || optab_handler (op, TYPE_MODE (type)) == CODE_FOR_nothing)
+	    return NULL_TREE;
+	  op = optab_for_tree_code (VEC_WIDEN_MULT_HI_EXPR,
+				    type, optab_default);
+	  if (op == NULL
+	      || optab_handler (op, TYPE_MODE (type)) == CODE_FOR_nothing)
+	    return NULL_TREE;
+
+	  for (i = 0; i < nunits; i++)
+	    sel[i] = 2 * i + (BYTES_BIG_ENDIAN ? 0 : 1);
+	  if (!can_vec_perm_p (TYPE_MODE (type), false, sel))
+	    return NULL_TREE;
+	}
     }
 
   cur_op = op0;
@@ -816,11 +837,34 @@ expand_vector_divmod (gimple_stmt_iterator *gsi, tree type, tree op0,
       for (i = 0; i < nunits; i++)
 	vec[i] = build_int_cst (TREE_TYPE (type), sel[i]);
       perm_mask = build_vector (type, vec);
-      mhi = gimplify_build2 (gsi, VEC_WIDEN_MULT_HI_EXPR, wider_type,
-			     cur_op, mulcst);
+
+      if (decl_e != NULL_TREE)
+	{
+	  gimple call;
+
+	  call = gimple_build_call (decl_e, 2, cur_op, mulcst);
+	  mhi = create_tmp_reg (wider_type, NULL);
+	  add_referenced_var (mhi);
+	  mhi = make_ssa_name (mhi, call);
+	  gimple_call_set_lhs (call, mhi);
+	  gsi_insert_seq_before (gsi, call, GSI_SAME_STMT);
+
+	  call = gimple_build_call (decl_o, 2, cur_op, mulcst);
+	  mlo = create_tmp_reg (wider_type, NULL);
+	  add_referenced_var (mlo);
+	  mlo = make_ssa_name (mlo, call);
+	  gimple_call_set_lhs (call, mlo);
+	  gsi_insert_seq_before (gsi, call, GSI_SAME_STMT);
+	}
+      else
+	{
+	  mhi = gimplify_build2 (gsi, VEC_WIDEN_MULT_HI_EXPR, wider_type,
+				 cur_op, mulcst);
+	  mlo = gimplify_build2 (gsi, VEC_WIDEN_MULT_LO_EXPR, wider_type,
+				 cur_op, mulcst);
+	}
+
       mhi = gimplify_build1 (gsi, VIEW_CONVERT_EXPR, type, mhi);
-      mlo = gimplify_build2 (gsi, VEC_WIDEN_MULT_LO_EXPR, wider_type,
-			     cur_op, mulcst);
       mlo = gimplify_build1 (gsi, VIEW_CONVERT_EXPR, type, mlo);
       if (BYTES_BIG_ENDIAN)
 	cur_op = gimplify_build3 (gsi, VEC_PERM_EXPR, type, mhi, mlo,