explow.c (convert_memory_address, [...]): Only return inner object if…

explow.c (convert_memory_address, [...]): Only return inner object if SUBREG_PROMOTED_VAR_P or known to be pointer.

	* explow.c (convert_memory_address, case SUBREG): Only return
	inner object if SUBREG_PROMOTED_VAR_P or known to be pointer.

From-SVN: r46862

gcc/ChangeLog

+Thu Nov  8 18:00:55 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+
+	* explow.c (convert_memory_address, case SUBREG): Only return
+	inner object if SUBREG_PROMOTED_VAR_P or known to be pointer.
+
 2001-11-08  Richard Henderson  <rth@redhat.com>
 
 	* Makefile.in (GCC_FOR_TARGET): Add build_tooldir/sys-include.

gcc/explow.c

@@ -363,6 +363,7 @@ convert_memory_address (to_mode, x)
 
     case SUBREG:
       if (POINTERS_EXTEND_UNSIGNED >= 0
+	  && (SUBREG_PROMOTED_VAR_P (x) || REG_POINTER (SUBREG_REG (x)))
 	  && GET_MODE (SUBREG_REG (x)) == to_mode)
 	return SUBREG_REG (x);
       break;