function.h (MINIMUM_METHOD_BOUNDARY): New macro.

2015-10-26  Christian Bruel  <christian.bruel@st.com>

	* function.h (MINIMUM_METHOD_BOUNDARY): New macro.
	* cp/decl.c (grokfndecl): Set DECL_ALIGN with MINIMUM_METHOD_BOUNDARY.
	* cp/method.c (implicitly_declare_fn): Likewise.
	* cp/lambda.c (maybe_add_lambda_conv_op): Likewise. Remove VBIT setting.
	* java/class.c (add_method_1): Likewise.

From-SVN: r229313

gcc/ChangeLog

+2015-10-26  Christian Bruel  <christian.bruel@st.com>
+
+	* function.h (MINIMUM_METHOD_BOUNDARY): New macro.
+	* cp/decl.c (grokfndecl): Set DECL_ALIGN with MINIMUM_METHOD_BOUNDARY.
+	* cp/method.c (implicitly_declare_fn): Likewise.
+	* cp/lambda.c (maybe_add_lambda_conv_op): Likewise. Remove VBIT setting.
+	* java/class.c (add_method_1): Likewise.
+
 2015-10-26  Richard Biener  <rguenther@suse.de>
 
 	* alloc-pool.h (base_pool_allocator): Use placement new.

gcc/cp/decl.c

@@ -7829,6 +7829,9 @@ grokfndecl (tree ctype,
       parm = build_this_parm (type, quals);
       DECL_CHAIN (parm) = parms;
       parms = parm;
+
+      /* Allocate space to hold the vptr bit if needed.  */
+      DECL_ALIGN (decl) = MINIMUM_METHOD_BOUNDARY;
     }
   DECL_ARGUMENTS (decl) = parms;
   for (t = parms; t; t = DECL_CHAIN (t))
@@ -7852,14 +7855,6 @@ grokfndecl (tree ctype,
       break;
     }
 
-  /* If pointers to member functions use the least significant bit to
-     indicate whether a function is virtual, ensure a pointer
-     to this function will have that bit clear.  */
-  if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
-      && TREE_CODE (type) == METHOD_TYPE
-      && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
-    DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
-
   if (friendp
       && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
     {

gcc/cp/lambda.c

@@ -1006,11 +1006,7 @@ maybe_add_lambda_conv_op (tree type)
   tree convfn = build_lang_decl (FUNCTION_DECL, name, fntype);
   tree fn = convfn;
   DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop);
-
-  if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
-      && DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
-    DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
-
+  DECL_ALIGN (fn) = MINIMUM_METHOD_BOUNDARY;
   SET_OVERLOADED_OPERATOR_CODE (fn, TYPE_EXPR);
   grokclassfn (type, fn, NO_SPECIAL);
   set_linkage_according_to_type (type, fn);
@@ -1042,9 +1038,6 @@ maybe_add_lambda_conv_op (tree type)
   tree statfn = build_lang_decl (FUNCTION_DECL, name, stattype);
   fn = statfn;
   DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop);
-  if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
-      && DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
-    DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
   grokclassfn (type, fn, NO_SPECIAL);
   set_linkage_according_to_type (type, fn);
   rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof);

gcc/cp/method.c

@@ -1849,13 +1849,8 @@ implicitly_declare_fn (special_function_kind kind, tree type,
       DECL_ASSIGNMENT_OPERATOR_P (fn) = 1;
       SET_OVERLOADED_OPERATOR_CODE (fn, NOP_EXPR);
     }
-  
-  /* If pointers to member functions use the least significant bit to
-     indicate whether a function is virtual, ensure a pointer
-     to this function will have that bit clear.  */
-  if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
-      && DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
-    DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
+
+  DECL_ALIGN (fn) = MINIMUM_METHOD_BOUNDARY;
 
   /* Create the explicit arguments.  */
   if (rhs_parm_type)

gcc/function.h

@@ -537,6 +537,13 @@ do {								\
 #define ASLK_REDUCE_ALIGN 1
 #define ASLK_RECORD_PAD 2
 
+/* If pointers to member functions use the least significant bit to
+   indicate whether a function is virtual, ensure a pointer
+   to this function will have that bit clear.  */
+#define MINIMUM_METHOD_BOUNDARY \
+  ((TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn)	     \
+   ? MAX (FUNCTION_BOUNDARY, 2 * BITS_PER_UNIT) : FUNCTION_BOUNDARY)
+
 
 
 extern void push_function_context (void);

gcc/java/class.c

@@ -779,13 +779,8 @@ add_method_1 (tree this_class, int access_flags, tree name, tree function_type)
   DECL_CHAIN (fndecl) = TYPE_METHODS (this_class);
   TYPE_METHODS (this_class) = fndecl;
 
-  /* If pointers to member functions use the least significant bit to
-     indicate whether a function is virtual, ensure a pointer
-     to this function will have that bit clear.  */
-  if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
-      && !(access_flags & ACC_STATIC)
-      && DECL_ALIGN (fndecl) < 2 * BITS_PER_UNIT)
-    DECL_ALIGN (fndecl) = 2 * BITS_PER_UNIT;
+  if (!(access_flags & ACC_STATIC))
+    DECL_ALIGN (fndecl) = MINIMUM_METHOD_BOUNDARY;
 
   /* Notice that this is a finalizer and update the class type
      accordingly. This is used to optimize instance allocation. */