reload1.c (eliminate_regs): Don't keep REG_DEAD notes around for things that were eliminated.

	* reload1.c (eliminate_regs): Don't keep REG_DEAD notes around for
	things that were eliminated.

From-SVN: r25823

gcc/ChangeLog

+Wed Mar 17 21:29:12 1999  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* reload1.c (eliminate_regs): Don't keep REG_DEAD notes around for
+	things that were eliminated.
+
 Wed Mar 17 12:16:26 1999  Richard Henderson  <rth@cygnus.com>
 
 	* function.c (fixup_var_refs_1): First try moving the expression

gcc/reload1.c

@@ -2914,7 +2914,17 @@ eliminate_regs (x, mem_mode, insn)
 	{
 	  new = eliminate_regs (XEXP (x, 0), mem_mode, insn);
 	  if (new != XEXP (x, 0))
-	    x = gen_rtx_EXPR_LIST (REG_NOTE_KIND (x), new, XEXP (x, 1));
+	    {
+	      /* If this is a REG_DEAD note, it is not valid anymore.
+		 Using the eliminated version could result in creating a
+		 REG_DEAD note for the stack or frame pointer.  */
+	      if (GET_MODE (x) == REG_DEAD)
+		return (XEXP (x, 1)
+			? eliminate_regs (XEXP (x, 1), mem_mode, insn)
+			: NULL_RTX);
+
+	      x = gen_rtx_EXPR_LIST (REG_NOTE_KIND (x), new, XEXP (x, 1));
+	    }
 	}
 
       /* ... fall through ...  */