gensupport.c: New file.

	* gensupport.c: New file.
	* gensupport.h: New file.
	* Makefile.in (HOST_RTL): Depend on gensupport.
	(gensupport.o) New rule.
	* genattr.c: Use gensupport for reading .md files.
	* genattrtab.c: Ditto.
	* gencodes.c: Ditto.
	* genconfig.c: Ditto.
	* genemit.c: Ditto.
	* genextract.c: Ditto.
	* genflags.c: Ditto.
	* genopinit.c: Ditto.
	* genoutput.c: Ditto.
	* genpeep.c: Ditto.
	* genrecog.c: Ditto.
	* rtl.def (define_insn_and_split): New DEF_RTL_EXPR.
	* md.texi (Insn Splitting): Document define_insn_and_split.

From-SVN: r33633

1 files changed, 8 insertions, 15 deletions

diff --git a/gcc/genflags.c b/gcc/genflags.c
index 39b5354..f679dd2 100644
--- a/gcc/genflags.c
+++ b/gcc/genflags.c
@@ -27,6 +27,7 @@ Boston, MA 02111-1307, USA.  */
 #include "rtl.h"
 #include "obstack.h"
 #include "errors.h"
+#include "gensupport.h"
 
 static struct obstack obstack;
 struct obstack *rtl_obstack = &obstack;
@@ -227,8 +228,6 @@ main (argc, argv)
   rtx *call_insns;
   rtx *normal_insns;
   rtx *insn_ptr;
-  FILE *infile;
-  register int c;
 
   progname = "genflags";
   obstack_init (rtl_obstack);
@@ -238,14 +237,9 @@ main (argc, argv)
   if (argc <= 1)
     fatal ("No input file name.");
 
-  infile = fopen (argv[1], "r");
-  if (infile == 0)
-    {
-      perror (argv[1]);
-      return (FATAL_EXIT_CODE);
-    }
-  read_rtx_filename = argv[1];
-
+  if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
+    return (FATAL_EXIT_CODE);
+  
   printf ("/* Generated automatically by the program `genflags'\n\
 from the machine description file `md'.  */\n\n");
 
@@ -253,12 +247,11 @@ from the machine description file `md'.  */\n\n");
 
   while (1)
     {
-      c = read_skip_spaces (infile);
-      if (c == EOF)
-	break;
-      ungetc (c, infile);
+      int line_no, insn_code_number = 0;
 
-      desc = read_rtx (infile);
+      desc = read_md_rtx (&line_no, &insn_code_number);
+      if (desc == NULL)
+	break;
       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 	gen_insn (desc);
     }