h8300.c (h8300_init_once): Default to -fstrict_volatile_bitfields.

* config/h8300/h8300.c (h8300_init_once): Default to
-fstrict_volatile_bitfields.

* config/sh/sh.c (sh_override_options): Default to
-fstrict_volatile_bitfields.

* config/rx/rx.c (rx_option_override): New.

* config/m32c/m32c.c (m32c_override_options): Default to
-fstrict_volatile_bitfields.

From-SVN: r162149

gcc/ChangeLog

+2010-07-13  DJ Delorie  <dj@redhat.com>
+
+	* config/h8300/h8300.c (h8300_init_once): Default to
+	-fstrict_volatile_bitfields.
+
+	* config/sh/sh.c (sh_override_options): Default to
+	-fstrict_volatile_bitfields.
+
+	* config/rx/rx.c (rx_option_override): New.
+
+	* config/m32c/m32c.c (m32c_override_options): Default to
+	-fstrict_volatile_bitfields.
+
 2010-07-13  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* tree.h (build_function_call_expr): Delete.

gcc/config/h8300/h8300.c

@@ -403,6 +403,10 @@ h8300_init_once (void)
 	 restore er6 though, so bump up the cost.  */
       h8300_move_ratio = 6;
     }
+
+  /* This target defaults to strict volatile bitfields.  */
+  if (flag_strict_volatile_bitfields < 0)
+    flag_strict_volatile_bitfields = 1;
 }
 
 /* Implement REG_CLASS_FROM_LETTER.

gcc/config/m32c/m32c.c

@@ -431,6 +431,10 @@ m32c_override_options (void)
 
   if (TARGET_A24)
     flag_ivopts = 0;
+
+  /* This target defaults to strict volatile bitfields.  */
+  if (flag_strict_volatile_bitfields < 0)
+    flag_strict_volatile_bitfields = 1;
 }
 
 /* Defining data structures for per-function information */

gcc/config/rx/rx.c

@@ -2190,6 +2190,14 @@ rx_set_optimization_options (void)
     }
 }
 
+static void
+rx_option_override (void)
+{
+  /* This target defaults to strict volatile bitfields.  */
+  if (flag_strict_volatile_bitfields < 0)
+    flag_strict_volatile_bitfields = 1;
+}
+
 
 static bool
 rx_allocate_stack_slots_for_args (void)
@@ -2778,6 +2786,9 @@ rx_memory_move_cost (enum machine_mode mode, enum reg_class regclass, bool in)
 #undef  TARGET_MEMORY_MOVE_COST
 #define TARGET_MEMORY_MOVE_COST			rx_memory_move_cost
 
+#undef  TARGET_OPTION_OVERRIDE
+#define TARGET_OPTION_OVERRIDE			rx_option_override
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 /* #include "gt-rx.h" */

gcc/config/sh/sh.c

@@ -973,6 +973,10 @@ sh_override_options (void)
 
   if (sh_fixed_range_str)
     sh_fix_range (sh_fixed_range_str);
+
+  /* This target defaults to strict volatile bitfields.  */
+  if (flag_strict_volatile_bitfields < 0)
+    flag_strict_volatile_bitfields = 1;
 }
 
 /* Print the operand address in x to the stream.  */