cp-tree.h (same_type_ignoring_top_level_qualifiers_p): New macro.

	* cp-tree.h (same_type_ignoring_top_level_qualifiers_p): New
	macro.
	* call.c (standard_conversion): Use it.
	(direct_reference_binding): Likewise.
	(build_over_call): Likewise.
	(is_properly_derived_from): Likewise.
	(compare_ics): Likewise.
	* class.c (resolves_to_fixed_type_p): Likewise.
	* optimize.c (declare_return_variable): Likewise.
	* pt.c (is_specialization_of): Likewise.
	(unify): Likewise.
	* typeck.c (comp_target_parms): Likeiwse.
	(build_static_cast): Likewise.
	(build_reinterpret_cast): Likewise.
	(build_const_cast): Likewise.
	(comp_ptr_ttypes_real): Likewise.
	(comp_ptr_ttypes_const): Likewise.
	* typeck2.c (process_init_constructor): Likewise.

From-SVN: r33571

gcc/cp/ChangeLog

+2000-05-01  Mark Mitchell  <mark@codesourcery.com>
+
+	* cp-tree.h (same_type_ignoring_top_level_qualifiers_p): New
+	macro.
+	* call.c (standard_conversion): Use it.
+	(direct_reference_binding): Likewise.
+	(build_over_call): Likewise.
+	(is_properly_derived_from): Likewise.
+	(compare_ics): Likewise.
+	* class.c (resolves_to_fixed_type_p): Likewise.
+	* optimize.c (declare_return_variable): Likewise.
+	* pt.c (is_specialization_of): Likewise.
+	(unify): Likewise.
+	* typeck.c (comp_target_parms): Likeiwse.
+	(build_static_cast): Likewise.
+	(build_reinterpret_cast): Likewise.
+	(build_const_cast): Likewise.
+	(comp_ptr_ttypes_real): Likewise.
+	(comp_ptr_ttypes_const): Likewise.
+	* typeck2.c (process_init_constructor): Likewise.
+
 2000-04-30  Scott Snyder <snyder@fnal.gov>
 
 	* decl.c (finish_destructor_body): Use the base destructor when

gcc/cp/call.c

@@ -712,8 +712,8 @@ standard_conversion (to, from, expr)
       enum tree_code ufcode = TREE_CODE (TREE_TYPE (from));
       enum tree_code utcode = TREE_CODE (TREE_TYPE (to));
 
-      if (same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (from)),
-		       TYPE_MAIN_VARIANT (TREE_TYPE (to))))
+      if (same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (from),
+						     TREE_TYPE (to)))
 	;
       else if (utcode == VOID_TYPE && ufcode != OFFSET_TYPE
 	       && ufcode != FUNCTION_TYPE)
@@ -729,9 +729,9 @@ standard_conversion (to, from, expr)
 	  tree tbase = TYPE_OFFSET_BASETYPE (TREE_TYPE (to));
 
 	  if (DERIVED_FROM_P (fbase, tbase)
-	      && (same_type_p 
-		  (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (from))),
-		   TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (to))))))
+	      && (same_type_ignoring_top_level_qualifiers_p
+		  (TREE_TYPE (TREE_TYPE (from)),
+		   TREE_TYPE (TREE_TYPE (to)))))
 	    {
 	      from = build_offset_type (tbase, TREE_TYPE (TREE_TYPE (from)));
 	      from = build_pointer_type (from);
@@ -1007,8 +1007,7 @@ direct_reference_binding (type, conv)
      either an identity conversion or, if the conversion function
      returns an entity of a type that is a derived class of the
      parameter type, a derived-to-base conversion.  */
-  if (!same_type_p (TYPE_MAIN_VARIANT (t),
-		    TYPE_MAIN_VARIANT (TREE_TYPE (conv))))
+  if (!same_type_ignoring_top_level_qualifiers_p (t, TREE_TYPE (conv)))
     {
       /* Represent the derived-to-base conversion.  */
       conv = build_conv (BASE_CONV, t, conv);
@@ -4076,8 +4075,8 @@ build_over_call (cand, args, flags)
       if (TREE_CODE (targ) == ADDR_EXPR)
 	{
 	  targ = TREE_OPERAND (targ, 0);
-	  if (!same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (arg))),
-			    TYPE_MAIN_VARIANT (TREE_TYPE (targ))))
+	  if (!same_type_ignoring_top_level_qualifiers_p 
+	      (TREE_TYPE (TREE_TYPE (arg)), TREE_TYPE (targ)))
 	    targ = NULL_TREE;
 	}
       else
@@ -4480,8 +4479,7 @@ is_properly_derived_from (derived, base)
 
   /* We only allow proper derivation here.  The DERIVED_FROM_P macro
      considers every class derived from itself.  */
-  return (!same_type_p (TYPE_MAIN_VARIANT (derived),
-			TYPE_MAIN_VARIANT (base))
+  return (!same_type_ignoring_top_level_qualifiers_p (derived, base)
 	  && DERIVED_FROM_P (base, derived));
 }
 
@@ -4870,8 +4868,7 @@ compare_ics (ics1, ics2)
      which the reference initialized by S1 refers */
       
   if (ref_binding1 && ref_binding2
-      && same_type_p (TYPE_MAIN_VARIANT (to_type1),
-		      TYPE_MAIN_VARIANT (to_type2)))
+      && same_type_ignoring_top_level_qualifiers_p (to_type1, to_type2))
     return comp_cv_qualification (target_type2, target_type1);
 
   /* Neither conversion sequence is better than the other.  */

gcc/cp/class.c

@@ -5215,7 +5215,7 @@ resolves_to_fixed_type_p (instance, nonnull)
     return 0;
   if (POINTER_TYPE_P (t))
     t = TREE_TYPE (t);
-  return same_type_p (TYPE_MAIN_VARIANT (t), TYPE_MAIN_VARIANT (fixed));
+  return same_type_ignoring_top_level_qualifiers_p (t, fixed);
 }
 
 

gcc/cp/cp-tree.h

@@ -3670,6 +3670,11 @@ enum overload_flags { NO_SPECIAL = 0, DTOR_FLAG, OP_FLAG, TYPENAME_FLAG };
 #define same_type_p(type1, type2) \
   comptypes ((type1), (type2), COMPARE_STRICT)
 
+/* Returns nonzero iff TYPE1 and TYPE2 are the same type, ignoring
+   top-level qualifiers.  */
+#define same_type_ignoring_top_level_qualifiers_p(type1, type2) \
+  same_type_p (TYPE_MAIN_VARIANT (type1), TYPE_MAIN_VARIANT (type2))
+
 /* Returns nonzero iff TYPE1 and TYPE2 are the same type, or if TYPE2
    is derived from TYPE1, or if TYPE2 is a pointer (reference) to a
    class derived from the type pointed to (referred to) by TYPE1.  */

gcc/cp/optimize.c

@@ -490,9 +490,10 @@ declare_return_variable (id, use_stmt)
       my_friendly_assert (id->target_exprs->elements_used != 0,
 			  20000430);
       var = TREE_OPERAND (VARRAY_TOP_TREE (id->target_exprs), 0);
-      my_friendly_assert (same_type_p (TREE_TYPE (var), 
-				       TREE_TYPE (result)),
-			  20000430);
+      my_friendly_assert 
+	(same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (var), 
+						    TREE_TYPE (result)),
+	 20000430);
     }
   /* Otherwise, make an appropriate copy.  */
   else

gcc/cp/pt.c

@@ -749,8 +749,7 @@ is_specialization_of (decl, tmpl)
 	   t != NULL_TREE;
 	   t = CLASSTYPE_USE_TEMPLATE (t)
 	     ? TREE_TYPE (CLASSTYPE_TI_TEMPLATE (t)) : NULL_TREE)
-	if (same_type_p (TYPE_MAIN_VARIANT (t), 
-			 TYPE_MAIN_VARIANT (TREE_TYPE (tmpl))))
+	if (same_type_ignoring_top_level_qualifiers_p (t, TREE_TYPE (tmpl)))
 	  return 1;
     }  
 
@@ -8528,11 +8527,9 @@ unify (tparms, targs, parm, arg, strict)
 			TYPE_MAX_VALUE (arg), UNIFY_ALLOW_INTEGER))
 	    return 1;
 	}
-      /* We use the TYPE_MAIN_VARIANT since we have already
-	 checked cv-qualification at the top of the
+      /* We have already checked cv-qualification at the top of the
 	 function.  */
-      else if (!same_type_p (TYPE_MAIN_VARIANT (arg),
-			     TYPE_MAIN_VARIANT (parm)))
+      else if (!same_type_ignoring_top_level_qualifiers_p (arg, parm))
 	return 1;
 
       /* As far as unification is concerned, this wins.	 Later checks
@@ -8621,8 +8618,7 @@ unify (tparms, targs, parm, arg, strict)
 	  return unify (tparms, targs, CLASSTYPE_TI_ARGS (parm),
 			CLASSTYPE_TI_ARGS (t), UNIFY_ALLOW_NONE);
 	}
-      else if (!same_type_p (TYPE_MAIN_VARIANT (parm),
-			     TYPE_MAIN_VARIANT (arg)))
+      else if (!same_type_ignoring_top_level_qualifiers_p (parm, arg))
 	return 1;
       return 0;
 

gcc/cp/typeck.c

@@ -1516,8 +1516,8 @@ comp_target_parms (parms1, parms2, strict)
 	      continue;
 	    }
 	  if (IS_AGGR_TYPE (TREE_TYPE (p1))
-	      && !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (p1)),
-			       TYPE_MAIN_VARIANT (TREE_TYPE (p2))))
+	      && !same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (p1),
+							     TREE_TYPE (p2)))
 	    return 0;
 	}
       /* Note backwards order due to contravariance.  */
@@ -5178,8 +5178,9 @@ build_static_cast (type, expr)
     }
   else if (TYPE_PTRMEM_P (type) && TYPE_PTRMEM_P (intype))
     {
-      if (same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))),
-		       TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (intype))))
+      if (same_type_ignoring_top_level_qualifiers_p
+	  (TREE_TYPE (TREE_TYPE (type)),
+	   TREE_TYPE (TREE_TYPE (intype)))
 	  && (binfo = get_binfo (TYPE_OFFSET_BASETYPE (TREE_TYPE (type)),
 				 TYPE_OFFSET_BASETYPE (TREE_TYPE (intype)), 0))
 	  && ! TREE_VIA_VIRTUAL (binfo))
@@ -5255,8 +5256,7 @@ build_reinterpret_cast (type, expr)
 	expr = build_indirect_ref (expr, 0);
       return expr;
     }
-  else if (same_type_p (TYPE_MAIN_VARIANT (intype), 
-			TYPE_MAIN_VARIANT (type)))
+  else if (same_type_ignoring_top_level_qualifiers_p (intype, type))
     return build_static_cast (type, expr);
 
   if (TYPE_PTR_P (type) && (TREE_CODE (intype) == INTEGER_TYPE
@@ -5339,8 +5339,8 @@ build_const_cast (type, expr)
     }
 
   intype = TREE_TYPE (expr);
-
-  if (same_type_p (TYPE_MAIN_VARIANT (intype), TYPE_MAIN_VARIANT (type)))
+  
+  if (same_type_ignoring_top_level_qualifiers_p (intype, type))
     return build_static_cast (type, expr);
   else if (TREE_CODE (type) == REFERENCE_TYPE)
     {
@@ -6979,7 +6979,7 @@ comp_ptr_ttypes_real (to, from, constp)
 
       if (TREE_CODE (to) != POINTER_TYPE)
 	return 
-	  same_type_p (TYPE_MAIN_VARIANT (to), TYPE_MAIN_VARIANT (from))
+	  same_type_ignoring_top_level_qualifiers_p (to, from)
 	  && (constp >= 0 || to_more_cv_qualified);
     }
 }
@@ -7037,8 +7037,7 @@ comp_ptr_ttypes_const (to, from)
 	  continue;
 
       if (TREE_CODE (to) != POINTER_TYPE)
-	return same_type_p (TYPE_MAIN_VARIANT (to), 
-			    TYPE_MAIN_VARIANT (from));
+	return same_type_ignoring_top_level_qualifiers_p (to, from);
     }
 }
 

gcc/cp/typeck2.c

@@ -765,8 +765,8 @@ process_init_constructor (type, init, elts)
 		  if (next1 == error_mark_node)
 		    return next1;
 		  my_friendly_assert
-		    (same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)),
-				  TYPE_MAIN_VARIANT (TREE_TYPE (next1))),
+		    (same_type_ignoring_top_level_qualifiers_p
+		     (TREE_TYPE (type), TREE_TYPE (next1)),
 		     981123);
 		  my_friendly_assert (tail1 == 0
 				      || TREE_CODE (tail1) == TREE_LIST, 319);

gcc/testsuite/g++.old-deja/g++.other/inline10.C

+// Build don't link:
+// Special g++ Options: -O2
+// Origin: Mark Mitchell <mark@codesourcery.com>
+
+struct S
+{
+};
+
+inline const S f () 
+{
+  return S ();
+}
+
+void g ()
+{
+  S s;
+  f ();
+}