re PR rtl-optimization/28011 ([SH] g++ generates wrong code, if…

re PR rtl-optimization/28011 ([SH] g++ generates wrong code, if '-fno-exceptions' and '-O' options are specified)

	PR rtl-optimization/28011
	* reload.c (push_reload): Set dont_share if IN appears in OUT
	also when IN is a PLUS rtx.
	(reg_overlap_mentioned_for_reload_p): Return true if X and IN
	are same PLUS rtx.

From-SVN: r124557

gcc/ChangeLog

+2007-05-08  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR rtl-optimization/28011
+	* reload.c (push_reload): Set dont_share if IN appears in OUT
+	also when IN is a PLUS rtx.
+	(reg_overlap_mentioned_for_reload_p): Return true if X and IN
+	are same PLUS rtx.
+
 2007-05-08  Kazu Hirata  <kazu@codesourcery.com>
 
 	* emit-rtl.c (unshare_all_rtl_1): Don't copy DECL_RTL.  Don't

gcc/reload.c

@@ -1180,7 +1180,7 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
 
   /* If IN appears in OUT, we can't share any input-only reload for IN.  */
   if (in != 0 && out != 0 && MEM_P (out)
-      && (REG_P (in) || MEM_P (in))
+      && (REG_P (in) || MEM_P (in) || GET_CODE (in) == PLUS)
       && reg_overlap_mentioned_for_reload_p (in, XEXP (out, 0)))
     dont_share = 1;
 
@@ -6516,7 +6516,8 @@ reg_overlap_mentioned_for_reload_p (rtx x, rtx in)
       if (REG_P (in))
 	return 0;
       else if (GET_CODE (in) == PLUS)
-	return (reg_overlap_mentioned_for_reload_p (x, XEXP (in, 0))
+	return (rtx_equal_p (x, in)
+		|| reg_overlap_mentioned_for_reload_p (x, XEXP (in, 0))
 		|| reg_overlap_mentioned_for_reload_p (x, XEXP (in, 1)));
       else return (reg_overlap_mentioned_for_reload_p (XEXP (x, 0), in)
 		   || reg_overlap_mentioned_for_reload_p (XEXP (x, 1), in));