re PR target/36780 (Wrong reload generated for subreg address on SH)

	PR target/36780
	* config/sh/sh.h (GO_IF_LEGITIMATE_ADDRESS): Allow
	(plus (plus (reg) (const_int)) (const_int)) when reload_in_progress.

From-SVN: r137838

gcc/ChangeLog

+2008-07-15  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/36780
+	* config/sh/sh.h (GO_IF_LEGITIMATE_ADDRESS): Allow
+	(plus (plus (reg) (const_int)) (const_int)) when reload_in_progress.
+
 2008-07-15  Andrew Pinski  <andrew_pinski@playstation.sony.com>
 
 	PR target/31568

gcc/config/sh/sh.h

@@ -2501,6 +2501,19 @@ struct sh_args {
 	    goto LABEL;							\
 	}								\
     }									\
+  /* FIXME: This is a temporary hack which should be removed.		\
+     When reload in progress, find_reloads_subreg_address tries to	\
+     make a new reload for some types of address.  Unfortunately it	\
+     generates wrong code on SH.  See PR36780.  The following is to	\
+     avoid this issue.  */						\
+  if (!TARGET_SHMEDIA && reload_in_progress				\
+      && GET_CODE (X) == PLUS						\
+      && (GET_MODE_SIZE (MODE) == 4 || GET_MODE_SIZE (MODE) == 8)	\
+      && GET_CODE (XEXP ((X), 0)) == PLUS				\
+      && GET_CODE (XEXP (XEXP ((X), 0), 1)) == CONST_INT		\
+      && BASE_REGISTER_RTX_P (XEXP (XEXP ((X), 0), 0))			\
+      && GET_CODE (XEXP ((X), 1)) == CONST_INT)				\
+    goto LABEL;								\
 }
 
 /* Try machine-dependent ways of modifying an illegitimate address