fold-const.c (fold_truthop): Don't check can_use_bit_fields_p.

gcc
	* fold-const.c (fold_truthop): Don't check can_use_bit_fields_p.
	(fold_binary): Likewise.
	* langhooks.c (lhd_can_use_bit_fields_p): Removed.
	* langhooks-def.h (lhd_can_use_bit_fields_p): Removed.
	(LANG_HOOKS_CAN_USE_BIT_FIELDS_P): Removed.
	(LANG_HOOKS_INITIALIZER): Remove LANG_HOOKS_CAN_USE_BIT_FIELDS_P.
	* langhooks.h (struct lang_hooks): Removed field
	'can_use_bit_fields_p'.
gcc/java
	* lang.c (java_can_use_bit_fields_p): Removed.
	(LANG_HOOKS_CAN_USE_BIT_FIELDS_P): Removed.

From-SVN: r120647

gcc/ChangeLog

+2007-01-10  Tom Tromey  <tromey@redhat.com>
+
+	* fold-const.c (fold_truthop): Don't check can_use_bit_fields_p.
+	(fold_binary): Likewise.
+	* langhooks.c (lhd_can_use_bit_fields_p): Removed.
+	* langhooks-def.h (lhd_can_use_bit_fields_p): Removed.
+	(LANG_HOOKS_CAN_USE_BIT_FIELDS_P): Removed.
+	(LANG_HOOKS_INITIALIZER): Remove LANG_HOOKS_CAN_USE_BIT_FIELDS_P.
+	* langhooks.h (struct lang_hooks): Removed field
+	'can_use_bit_fields_p'.
+
 2007-01-10  Ralf Corsépius <ralf.corsepius@rtems.org>
 
 	* config/bfin/t-bfin, config/bfin/t-bfin-elf: Remove GCC_CFLAGS.

gcc/fold-const.c

 /* Fold a constant sub-tree into a single node for C-compiler
    Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-   2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -5117,11 +5117,6 @@ fold_truthop (enum tree_code code, tree truth_type, tree lhs, tree rhs)
 	return 0;
     }
 
-  /* After this point all optimizations will generate bit-field
-     references, which we might not want.  */
-  if (! lang_hooks.can_use_bit_fields_p ())
-    return 0;
-
   /* See if we can find a mode that contains both fields being compared on
      the left.  If we can't, fail.  Otherwise, update all constants and masks
      to be relative to a field of that size.  */
@@ -10947,8 +10942,7 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1)
 	}
 
       /* If this is a comparison of a field, we may be able to simplify it.  */
-      if (((TREE_CODE (arg0) == COMPONENT_REF
-	    && lang_hooks.can_use_bit_fields_p ())
+      if ((TREE_CODE (arg0) == COMPONENT_REF
 	   || TREE_CODE (arg0) == BIT_FIELD_REF)
 	  /* Handle the constant case even without -O
 	     to make sure the warnings are given.  */

gcc/java/ChangeLog

+2007-01-10  Tom Tromey  <tromey@redhat.com>
+
+	* lang.c (java_can_use_bit_fields_p): Removed.
+	(LANG_HOOKS_CAN_USE_BIT_FIELDS_P): Removed.
+
 2007-01-09  Andrew Haley  <aph@redhat.com>
 
 	* expr.c (build_java_arrayaccess): Rewrite to generate array

gcc/java/lang.c

@@ -60,7 +60,6 @@ static tree java_tree_inlining_walk_subtrees (tree *, int *, walk_tree_fn,
 					      void *, struct pointer_set_t *);
 static int merge_init_test_initialization (void * *, void *);
 static int inline_init_test_initialization (void * *, void *);
-static bool java_can_use_bit_fields_p (void);
 static bool java_dump_tree (void *, tree);
 static void dump_compound_expr (dump_info_p, tree);
 static bool java_decl_ok_for_sibcall (tree);
@@ -178,8 +177,6 @@ struct language_function GTY(())
 #define LANG_HOOKS_DECL_PRINTABLE_NAME lang_printable_name
 #undef LANG_HOOKS_PRINT_ERROR_FUNCTION
 #define LANG_HOOKS_PRINT_ERROR_FUNCTION	java_print_error_function
-#undef LANG_HOOKS_CAN_USE_BIT_FIELDS_P
-#define LANG_HOOKS_CAN_USE_BIT_FIELDS_P java_can_use_bit_fields_p
 
 #undef LANG_HOOKS_TYPE_FOR_MODE
 #define LANG_HOOKS_TYPE_FOR_MODE java_type_for_mode
@@ -597,14 +594,6 @@ java_init_options (unsigned int argc ATTRIBUTE_UNUSED,
   return CL_Java;
 }
 
-static bool
-java_can_use_bit_fields_p (void)
-{
-  /* The bit-field optimizations cause problems when generating class
-     files.  */
-  return flag_emit_class_files ? false : true;
-}
-
 /* Post-switch processing.  */
 static bool
 java_post_options (const char **pfilename)

gcc/langhooks-def.h

 /* Default macros to initialize the lang_hooks data structure.
-   Copyright 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
    Contributed by Alexandre Oliva  <aoliva@redhat.com>
 
 This file is part of GCC.
@@ -60,7 +60,6 @@ extern int lhd_expand_decl (tree);
 extern void lhd_print_error_function (struct diagnostic_context *,
 				      const char *);
 extern void lhd_set_decl_assembler_name (tree);
-extern bool lhd_can_use_bit_fields_p (void);
 extern bool lhd_warn_unused_global_decl (tree);
 extern void lhd_incomplete_type_error (tree, tree);
 extern tree lhd_type_promotes_to (tree);
@@ -116,7 +115,6 @@ extern void lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *,
 #define LANG_HOOKS_STATICP		lhd_staticp
 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL lhd_do_nothing_t
 #define LANG_HOOKS_SET_DECL_ASSEMBLER_NAME lhd_set_decl_assembler_name
-#define LANG_HOOKS_CAN_USE_BIT_FIELDS_P lhd_can_use_bit_fields_p
 #define LANG_HOOKS_REDUCE_BIT_FIELD_OPERATIONS false
 #define LANG_HOOKS_NO_BODY_BLOCKS	false
 #define LANG_HOOKS_PRINT_STATISTICS	lhd_do_nothing
@@ -303,7 +301,6 @@ extern tree lhd_make_node (enum tree_code);
   LANG_HOOKS_STATICP, \
   LANG_HOOKS_DUP_LANG_SPECIFIC_DECL, \
   LANG_HOOKS_SET_DECL_ASSEMBLER_NAME, \
-  LANG_HOOKS_CAN_USE_BIT_FIELDS_P, \
   LANG_HOOKS_REDUCE_BIT_FIELD_OPERATIONS, \
   LANG_HOOKS_NO_BODY_BLOCKS, \
   LANG_HOOKS_PRINT_STATISTICS, \

gcc/langhooks.c

@@ -185,13 +185,6 @@ lhd_set_decl_assembler_name (tree decl)
     }
 }
 
-/* By default we always allow bit-field based optimizations.  */
-bool
-lhd_can_use_bit_fields_p (void)
-{
-  return true;
-}
-
 /* Type promotion for variable arguments.  */
 tree
 lhd_type_promotes_to (tree ARG_UNUSED (type))

gcc/langhooks.h

@@ -347,10 +347,6 @@ struct lang_hooks
      assembler does not talk about it.  */
   void (*set_decl_assembler_name) (tree);
 
-  /* Return nonzero if fold-const is free to use bit-field
-     optimizations, for instance in fold_truthop().  */
-  bool (*can_use_bit_fields_p) (void);
-
   /* Nonzero if operations on types narrower than their mode should
      have their results reduced to the precision of the type.  */
   bool reduce_bit_field_operations;