reg-notes.def (REG_DEP_TRUE): New entry, place first so it gets value 0.

	* reg-notes.def (REG_DEP_TRUE): New entry, place first so it
	gets value 0.
	* print-rtl.c (print_rtx): Print the name of a REG_NOTE even
	if it has value 0.

From-SVN: r87821

gcc/ChangeLog

+2004-09-21  Zack Weinberg  <zack@codesourcery.com>
+
+	* reg-notes.def (REG_DEP_TRUE): New entry, place first so it
+	gets value 0.
+	* print-rtl.c (print_rtx): Print the name of a REG_NOTE even
+	if it has value 0.
+
 2004-09-21  Daniel Berlin <dberlin@dberlin.org>
-	
+
 	* c-typeck.c (build_function_call): Give name of object
 	we are attempting to call in error message.
 	* c-objc-common.c (c_tree_printer): Call pp_expression,
@@ -30,7 +37,7 @@
 	precedence of stripped constant.
 
 2004-09-20 Jeff Law  <law@redhat.com>
-           Jan Hubicka  <jh@suse.cz>
+	   Jan Hubicka  <jh@suse.cz>
 
 	* tree-ssanames.c (make_ssa_name): No longer need to clear, then
 	initialize key elements here.

gcc/print-rtl.c

@@ -186,16 +186,15 @@ print_rtx (rtx in_rtx)
 	  if (RTX_FLAG (in_rtx, return_val))
 	    fputs ("/i", outfile);
 
-	  if (GET_MODE (in_rtx) != VOIDmode)
-	    {
-	      /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
-	      if (GET_CODE (in_rtx) == EXPR_LIST
-		  || GET_CODE (in_rtx) == INSN_LIST)
-		fprintf (outfile, ":%s",
-			 GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
-	      else
-		fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
-	    }
+	  /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
+	  if (GET_CODE (in_rtx) == EXPR_LIST
+	      || GET_CODE (in_rtx) == INSN_LIST)
+	    fprintf (outfile, ":%s",
+		     GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
+
+	  /* For other rtl, print the mode if it's not VOID.  */
+	  else if (GET_MODE (in_rtx) != VOIDmode)
+	    fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
 	}
     }
 

gcc/reg-notes.def

@@ -26,6 +26,12 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 /* Shorthand.  */
 #define REG_NOTE(NAME) DEF_REG_NOTE (REG_##NAME)
 
+/* REG_DEP_TRUE is used in LOG_LINKS to represent a read-after-write
+   dependency (i.e. a true data dependency).  This is here, not
+   grouped with REG_DEP_ANTI and REG_DEP_OUTPUT, because some passes
+   use a literal 0 for it.  */
+REG_NOTE (DEP_TRUE)
+
 /* The value in REG dies in this insn (i.e., it is not needed past
    this insn).  If REG is set in this insn, the REG_DEAD note may,
    but need not, be omitted.  */
@@ -92,9 +98,7 @@ REG_NOTE (CC_USER)
 REG_NOTE (LABEL)
 
 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
-   write-after-read and write-after-write dependencies respectively.
-   Data dependencies, which are the only type of LOG_LINK created by
-   flow, are represented by a 0 reg note kind.  */
+   write-after-read and write-after-write dependencies respectively.  */
 REG_NOTE (DEP_ANTI)
 REG_NOTE (DEP_OUTPUT)