tree.h (DECL_DISREGARD_INLINE_LIMITS): New.

2007-08-28  Richard Guenther  <rguenther@suse.de>

	* tree.h (DECL_DISREGARD_INLINE_LIMITS): New.
	(struct tree_function_decl): Make function_code a bitfield.
	Add disregard_inline_limits flag.
	* cgraphunit.c (cgraph_process_new_functions): Check
	DECL_DISREGARD_INLINE_LIMITS instead of disregard_inline_limits_p.
	(cgraph_preserve_function_body_p): Likewise.
	* ipa-inline.c (compute_inline_parameters): Likewise.
	* c-decl.c (finish_function): Set DECL_DISREGARD_INLINE_LIMITS
	for GNU C extern inline functions.
	(merge_decls): Merge DECL_DISREGARD_INLINE_LIMITS.
	* tree-inline.c (disregard_inline_limits_p): Remove.
	* tree-inline.h (disregard_inline_limits_p): Likewise.
	* c-common.c (handle_always_inline_attribute): Set
	DECL_DISREGARD_INLINE_LIMITS.
	* langhooks.c (add_builtin_function): Verify the function code
	fits in the bitfield.

	cp/
	* decl.c (duplicate_decls): Merge DECL_DISREGARD_INLINE_LIMITS.

From-SVN: r127851

gcc/ChangeLog

+2007-08-28  Richard Guenther  <rguenther@suse.de>
+
+	* tree.h (DECL_DISREGARD_INLINE_LIMITS): New.
+	(struct tree_function_decl): Make function_code a bitfield.
+	Add disregard_inline_limits flag.
+	* cgraphunit.c (cgraph_process_new_functions): Check
+	DECL_DISREGARD_INLINE_LIMITS instead of disregard_inline_limits_p.
+	(cgraph_preserve_function_body_p): Likewise.
+	* ipa-inline.c (compute_inline_parameters): Likewise.
+	* c-decl.c (finish_function): Set DECL_DISREGARD_INLINE_LIMITS
+	for GNU C extern inline functions.
+	(merge_decls): Merge DECL_DISREGARD_INLINE_LIMITS.
+	* tree-inline.c (disregard_inline_limits_p): Remove.
+	* tree-inline.h (disregard_inline_limits_p): Likewise.
+	* c-common.c (handle_always_inline_attribute): Set
+	DECL_DISREGARD_INLINE_LIMITS.
+	* langhooks.c (add_builtin_function): Verify the function code
+	fits in the bitfield.
+
 2007-08-28  Mircea Namolaru  <namolaru@il.ibm.com>
             Vladimir Yanovsky  <yanov@il.ibm.com>
             Revital Eres  <eres@il.ibm.com>

gcc/c-common.c

@@ -4864,8 +4864,9 @@ handle_always_inline_attribute (tree *node, tree name,
 {
   if (TREE_CODE (*node) == FUNCTION_DECL)
     {
-      /* Do nothing else, just set the attribute.  We'll get at
-	 it later with lookup_attribute.  */
+      /* Set the attribute and mark it for disregarding inline
+	 limits.  */
+      DECL_DISREGARD_INLINE_LIMITS (*node) = 1;
     }
   else
     {

gcc/c-decl.c

@@ -1819,6 +1819,11 @@ merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype)
 
 	  DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
 	    = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
+
+	  DECL_DISREGARD_INLINE_LIMITS (newdecl)
+	    = DECL_DISREGARD_INLINE_LIMITS (olddecl)
+	    = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
+	       || DECL_DISREGARD_INLINE_LIMITS (olddecl));
 	}
 
       if (DECL_BUILT_IN (olddecl))
@@ -6771,6 +6776,11 @@ finish_function (void)
   /* Finalize the ELF visibility for the function.  */
   c_determine_visibility (fndecl);
 
+  /* For GNU C extern inline functions disregard inline limits.  */
+  if (DECL_EXTERNAL (fndecl) 
+      && DECL_DECLARED_INLINE_P (fndecl))
+    DECL_DISREGARD_INLINE_LIMITS (fndecl) = 1;
+
   /* Genericize before inlining.  Delay genericizing nested functions
      until their parent function is genericized.  Since finalizing
      requires GENERIC, delay that as well.  */

gcc/cgraphunit.c

@@ -381,7 +381,7 @@ cgraph_process_new_functions (void)
 	  node->local.self_insns = estimate_num_insns (fndecl,
 						       &eni_inlining_weights);
 	  node->local.disregard_inline_limits
-	    |= disregard_inline_limits_p (fndecl);
+	    |= DECL_DISREGARD_INLINE_LIMITS (fndecl);
 	  /* Inlining characteristics are maintained by the
 	     cgraph_mark_inline.  */
 	  node->global.insns = node->local.self_insns;
@@ -1252,7 +1252,7 @@ cgraph_preserve_function_body_p (tree decl)
   struct cgraph_node *node;
   if (!cgraph_global_info_ready)
     return (flag_really_no_inline
-	    ? disregard_inline_limits_p (decl)
+	    ? DECL_DISREGARD_INLINE_LIMITS (decl)
 	    : DECL_INLINE (decl));
   /* Look if there is any clone around.  */
   for (node = cgraph_node (decl); node; node = node->next_clone)

gcc/cp/ChangeLog

+2007-08-28  Richard Guenther  <rguenther@suse.de>
+
+	* decl.c (duplicate_decls): Merge DECL_DISREGARD_INLINE_LIMITS.
+
 2007-08-28  Gabriel Dos Reis  <gdr@integrable-solutions.net>
 	
 	* error.c (dump_expr): Handle COMPLEX_CST.

gcc/cp/decl.c

@@ -1954,6 +1954,11 @@ duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
 
 	  DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
 	    = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
+
+	  DECL_DISREGARD_INLINE_LIMITS (newdecl)
+	    = DECL_DISREGARD_INLINE_LIMITS (olddecl)
+	    = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
+	       || DECL_DISREGARD_INLINE_LIMITS (olddecl));
 	}
 
       /* Preserve abstractness on cloned [cd]tors.  */

gcc/ipa-inline.c

@@ -1529,7 +1529,7 @@ compute_inline_parameters (void)
 					       &eni_inlining_weights);
   if (node->local.inlinable && !node->local.disregard_inline_limits)
     node->local.disregard_inline_limits
-      = disregard_inline_limits_p (current_function_decl);
+      = DECL_DISREGARD_INLINE_LIMITS (current_function_decl);
   if (flag_really_no_inline && !node->local.disregard_inline_limits)
     node->local.inlinable = 0;
   /* Inlining characteristics are maintained by the cgraph_mark_inline.  */

gcc/langhooks.c

@@ -480,6 +480,9 @@ add_builtin_function (const char *name,
   TREE_PUBLIC (decl)         = 1;
   DECL_EXTERNAL (decl)       = 1;
   DECL_BUILT_IN_CLASS (decl) = cl;
+
+  DECL_FUNCTION_CODE (decl)  = -1;
+  gcc_assert (DECL_FUNCTION_CODE (decl) >= function_code);
   DECL_FUNCTION_CODE (decl)  = function_code;
 
   if (library_name)

gcc/tree-inline.c

@@ -1936,20 +1936,6 @@ inlinable_function_p (tree fn)
   return inlinable;
 }
 
-/* Return true if we shall disregard inlining limits for the function
-   FN during inlining.  */
-
-bool
-disregard_inline_limits_p (tree fn)
-{
-  /* GNU extern inline functions are supposed to be cheap.  */
-  if (DECL_DECLARED_INLINE_P (fn)
-      && DECL_EXTERNAL (fn))
-    return true;
-
-  return lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL_TREE;
-}
-
 /* Estimate the cost of a memory move.  Use machine dependent
    word size and take possible memcpy call into account.  */
 

gcc/tree-inline.h

@@ -130,7 +130,6 @@ extern void insert_decl_map (copy_body_data *, tree, tree);
 
 unsigned int optimize_inline_calls (tree);
 bool tree_inlinable_function_p (tree);
-bool disregard_inline_limits_p (tree);
 tree copy_tree_r (tree *, int *, void *);
 void clone_body (tree, tree, void *);
 void save_body (tree, tree *, tree *);

gcc/tree.h

@@ -3273,6 +3273,13 @@ struct tree_decl_non_common GTY(())
 #define DECL_DECLARED_INLINE_P(NODE) \
   (FUNCTION_DECL_CHECK (NODE)->function_decl.declared_inline_flag)
 
+/* Nonzero in a FUNCTION_DECL that should be always inlined by the inliner
+   disregarding size and cost heuristics.  This is equivalent to using
+   the always_inline attribute without the required diagnostics if the
+   function cannot be inlined.  */
+#define DECL_DISREGARD_INLINE_LIMITS(NODE) \
+  (FUNCTION_DECL_CHECK (NODE)->function_decl.disregard_inline_limits)
+
 /* For FUNCTION_DECL, this holds a pointer to a structure ("struct function")
    that describes the status of this function.  */
 #define DECL_STRUCT_FUNCTION(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.f)
@@ -3299,27 +3306,33 @@ struct tree_function_decl GTY(())
 {
   struct tree_decl_non_common common;
 
+  struct function *f;
+
   /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
-     DECL_FUNCTION_CODE.  Otherwise unused.  */
-  enum built_in_function function_code;
+     DECL_FUNCTION_CODE.  Otherwise unused.
+     ???  The bitfield needs to be able to hold all target function
+	  codes as well.  */
+  ENUM_BITFIELD(built_in_function) function_code : 10;
+  ENUM_BITFIELD(built_in_class) built_in_class : 2;
 
   unsigned static_ctor_flag : 1;
   unsigned static_dtor_flag : 1;
   unsigned uninlinable : 1;
   unsigned possibly_inlined : 1;
+
   unsigned novops_flag : 1;
   unsigned returns_twice_flag : 1;
   unsigned malloc_flag : 1;
   unsigned pure_flag : 1;
-
   unsigned declared_inline_flag : 1;
   unsigned regdecl_flag : 1;
   unsigned inline_flag : 1;
   unsigned no_instrument_function_entry_exit : 1;
+
   unsigned no_limit_stack : 1;
-  ENUM_BITFIELD(built_in_class) built_in_class : 2;
+  unsigned disregard_inline_limits : 1;
 
-  struct function *f;
+  /* 6 bits left */
 };
 
 /* For a TYPE_DECL, holds the "original" type.  (TREE_TYPE has the copy.) */