function.c (diddle_return_value): Use hard_function_value to get an rtx suitable…

function.c (diddle_return_value): Use hard_function_value to get an rtx suitable for use in the USE/CLOBBER insn.

        * function.c (diddle_return_value): Use hard_function_value to
        get an rtx suitable for use in the USE/CLOBBER insn.

From-SVN: r30494

gcc/ChangeLog

 Thu Nov 11 18:54:24 1999  Jeffrey A Law  (law@cygnus.com)
 
+	* function.c (diddle_return_value): Use hard_function_value to
+	get an rtx suitable for use in the USE/CLOBBER insn.
+
 	* global.c (global_conflicts): Update comments.
 	(record_conflicts): No need to record conflicts between pseudos here.
 

gcc/function.c

@@ -6200,10 +6200,16 @@ void
 diddle_return_value (code)
      enum rtx_code code;
 {
-  rtx return_reg = DECL_RTL (DECL_RESULT (current_function_decl));
+  rtx return_reg;
+  tree decl_result = DECL_RESULT (current_function_decl);
 
-  if (return_reg)
+  if (DECL_RTL (decl_result))
     {
+      /* Use hard_function_value to avoid creating a reference to a BLKmode 
+	 register in the USE/CLOBBER insn.  */
+      return_reg = hard_function_value (TREE_TYPE (decl_result),
+					current_function_decl);
+
       if (GET_CODE (return_reg) == REG
 	  && REGNO (return_reg) < FIRST_PSEUDO_REGISTER)
 	emit_insn (gen_rtx_fmt_e (code, VOIDmode, return_reg));