* rtl.h (traverse_md_constants): Declare.

	(struct md_constant): Define.
	* Makefile.in (HOST_RTL): Add hashtab.o .
	(OBJS): Add hashtab.o .
	(hashtab.o): New rule.
	(rtl.o): Depends on HASHTAB_H.
	* rtl.c (hashtab.h): #include.
	(md_constants): New static variable.
	(def_hash, def_name_eq_p, read_constants): New static functions.
	(traverse_md_constants): New function.
	(read_name): Do constant expansion.
	(read_rtx): Recognize define_constants.
	* gencodes.c (print_md_constant): New function.
	(main): Emit #defines for all constant definitions encountered.
	* md.texi (Constant Definitions): New node.
	* gensupport.c (xcalloc): New function.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@37635 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 19 insertions, 2 deletions

diff --git a/gcc/gencodes.c b/gcc/gencodes.c
index 3c9bf9cc20c..04d6b45961c 100644
--- a/gcc/gencodes.c
+++ b/gcc/gencodes.c
@@ -32,6 +32,7 @@ Boston, MA 02111-1307, USA.  */
 static int insn_code_number;
 
 static void gen_insn PARAMS ((rtx));
+static int print_md_constant PARAMS ((void **, void *));
 
 static void
 gen_insn (insn)
@@ -86,9 +87,11 @@ from the machine description file `md'.  */\n\n");
 
   printf ("  CODE_FOR_nothing = %d };\n", insn_code_number + 1);
 
-  printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
+  printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n\n");
 
-  printf ("#endif /* MAX_INSN_CODE */\n");
+  traverse_md_constants (print_md_constant, stdout);
+
+  printf ("\n#endif /* MAX_INSN_CODE */\n");
 
   fflush (stdout);
   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
@@ -101,3 +104,17 @@ get_insn_name (code)
 {
   return NULL;
 }
+
+/* Called via traverse_md_constants; emit a #define for
+   the current constant definition.  */
+static int
+print_md_constant (slot, info)
+     void **slot;
+     void *info;
+{
+  struct md_constant *def = *slot;
+  FILE *file = info;
+
+  fprintf (file, "#define %s %s\n", def->name, def->value);
+  return 1;
+}