alias.c (find_base_value): Use FIND_BASE_TERM.

gcc/
	* alias.c (find_base_value): Use FIND_BASE_TERM.
	* doc/tm.texi (FIND_BASE_TERM): Update documentation.

From-SVN: r140612

gcc/ChangeLog

 2008-09-23  Richard Sandiford  <rdsandiford@googlemail.com>
 
+	* alias.c (find_base_value): Use FIND_BASE_TERM.
+	* doc/tm.texi (FIND_BASE_TERM): Update documentation.
+
+2008-09-23  Richard Sandiford  <rdsandiford@googlemail.com>
+
 	* config/i386/i386.c: Include cselib.h.
 	(ix86_pic_register_p): New function.
 	(ix86_delegitimize_address): Use it to check for the PIC register.

gcc/alias.c

@@ -836,6 +836,11 @@ find_base_value (rtx src)
 {
   unsigned int regno;
 
+#if defined (FIND_BASE_TERM)
+  /* Try machine-dependent ways to find the base term.  */
+  src = FIND_BASE_TERM (src);
+#endif
+
   switch (GET_CODE (src))
     {
     case SYMBOL_REF:

gcc/doc/tm.texi

@@ -5355,8 +5355,8 @@ preserve functionality of inline assembly constructs using the
 @defmac FIND_BASE_TERM (@var{x})
 A C expression to determine the base term of address @var{x},
 or to provide a simplified version of @var{x} from which @file{alias.c}
-can easily find the base term.  This macro is used in only one place:
-@code{find_base_term} in @file{alias.c}.
+can easily find the base term.  This macro is used in only two places:
+@code{find_base_value} and @code{find_base_term} in @file{alias.c}.
 
 It is always safe for this macro to not be defined.  It exists so
 that alias analysis can understand machine-dependent addresses.