More verbose dumping on missed vector optabs

The following changes 'no optab' to mention which tree code and
vector type we were looking for and adds 'shift' to the instances
of this message emitted from vectorizable_shift.

	* tree-vect-stmts.cc (vectorizable_shift): Improve missing
	optab or optab support messages.
	(vectorizable_operation): Likewise.

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 8086d4c35c9a7ea585e8996ed51fdd39db551de6..a563238c4be036da2d5dd9f6b582216bb98e9679 100644 (file)
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -6348,7 +6348,8 @@ vectorizable_shift (vec_info *vinfo,
     {
       if (dump_enabled_p ())
         dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
-                         "no optab.\n");
+                        "no shift optab for %s and %T.\n",
+                        get_tree_code_name (code), vectype);
       return false;
     }
   vec_mode = TYPE_MODE (vectype);
@@ -6357,7 +6358,7 @@ vectorizable_shift (vec_info *vinfo,
     {
       if (dump_enabled_p ())
         dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
-                         "op not supported by target.\n");
+                        "shift op not supported by target.\n");
       return false;
     }
   /* vector lowering cannot optimize vector shifts using word arithmetic.  */
@@ -6723,7 +6724,8 @@ vectorizable_operation (vec_info *vinfo,
     {
       if (dump_enabled_p ())
        dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
-                        "no optab.\n");
+                        "no optab for %s and %T.\n",
+                        get_tree_code_name (code), vectype);
       return false;
     }
   target_support_p = can_implement_p (optab, vec_mode);