configure.in (ENUM_BITFIELDS_ARE_UNSIGNED): Added.

        * configure.in (ENUM_BITFIELDS_ARE_UNSIGNED): Added.  Check that
        bitfields of the host compiler are not signed quantities.
        * config.in: Regenerate.
        * configure: Regenerate.
        * system.h (USE_ENUM_BITFIELDS): Added.
        (ENUM_BITFIELDS): Added.
        * rtl.h (rtx_def): Members `code', `mode', now ENUM_BITFIELD.
        (SHORT_ENUM_BUG): Deleted.
        * tree.h (tree_common): Members `code', `mode', `built_in_class',
        now ENUM_BITFIELD.
        * config/i386/xm-sco.h (ONLY_INT_FIELDS): Deleted.
        (CODE_FIELD_BUG): Likewise.
        * config/m68k/x-apollo68 (CC): Deleted SHORT_ENUM_BUG.
        (OLD_CC): Likewise.
        * config/m68k/x-ccur (X_CFLAGS): Likewise.

From-SVN: r33233

1 files changed, 3 insertions, 16 deletions

diff --git a/gcc/tree.h b/gcc/tree.h
index e28f624..ae194cd 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -126,12 +126,7 @@ struct tree_common
 {
   union tree_node *chain;
   union tree_node *type;
-#ifdef ONLY_INT_FIELDS
-  unsigned int code : 8;
-#else
-  enum tree_code code : 8;
-#endif
-
+  ENUM_BITFIELD(tree_code) code : 8;
   unsigned side_effects_flag : 1;
   unsigned constant_flag : 1;
   unsigned permanent_flag : 1;
@@ -906,11 +901,7 @@ struct tree_type
   unsigned int uid;
 
   unsigned int precision : 9;
-#ifdef ONLY_INT_FIELDS
-  unsigned int mode : 7;
-#else
-  enum machine_mode mode : 7;
-#endif
+  ENUM_BITFIELD(machine_mode) mode : 7;
 
   unsigned string_flag : 1;
   unsigned no_force_blk_flag : 1;
@@ -1394,11 +1385,7 @@ struct tree_decl
   unsigned malloc_flag : 1;
   unsigned no_limit_stack : 1;
   unsigned pure_flag : 1;
-#ifdef ONLY_INT_FIELDS
-  unsigned int built_in_class : 2;
-#else
-  enum built_in_class built_in_class : 2;
-#endif
+  ENUM_BITFIELD(built_in_class) built_in_class : 2;
 
   unsigned lang_flag_0 : 1;
   unsigned lang_flag_1 : 1;