(make_decl_rtl): If a variable has an asm operand that refers to,

e.g., fp, make a distinct RTL for it.

From-SVN: r4215

gcc/varasm.c

@@ -354,7 +354,16 @@ make_decl_rtl (decl, asmspec, top_level)
 	    error ("global register variable follows a function definition");
 	  if (TREE_THIS_VOLATILE (decl))
 	    warning ("volatile register variables don't work as you might wish");
-	  DECL_RTL (decl) = gen_rtx (REG, DECL_MODE (decl), reg_number);
+
+	  /* If the user specified one of the eliminables registers here,
+	     e.g., FRAME_POINTER_REGNUM, we don't want to get this variable
+	     confused with that register and be eliminated.  Although this
+	     usage is somewhat suspect, we nevertheless use the following
+	     kludge to avoid setting DECL_RTL to frame_pointer_rtx.  */
+
+	  DECL_RTL (decl)
+	    = gen_rtx (REG, DECL_MODE (decl), FIRST_PSEUDO_REGISTER);
+	  REGNO (DECL_RTL (decl)) = reg_number;
 	  REG_USERVAR_P (DECL_RTL (decl)) = 1;
 
 	  if (top_level)