tm.texi (ARG_POINTER_CFA_OFFSET): Document new default.

2009-12-22  Paul Brook <paul@codesourcery.com>

	gcc/
	* doc/tm.texi (ARG_POINTER_CFA_OFFSET): Document new default.
	* defaults.h (ARG_POINTER_CFA_OFFSET): Add pretend_args_size.
	* config/spu/spu.h (ARG_POINTER_CFA_OFFSET): Add pretend_args_size.

From-SVN: r155396

gcc/ChangeLog

+2009-12-22  Paul Brook <paul@codesourcery.com>
+
+	* doc/tm.texi (ARG_POINTER_CFA_OFFSET): Document new default.
+	* defaults.h (ARG_POINTER_CFA_OFFSET): Add pretend_args_size.
+	* config/spu/spu.h (ARG_POINTER_CFA_OFFSET): Add pretend_args_size.
+
 2009-12-21  Brian Hackett  <bhackett1024@gmail.com>
 
 	* plugin.def: Rename pre-genericize event.

gcc/config/spu/spu.h

@@ -272,7 +272,8 @@ targetm.resolve_overloaded_builtin = spu_resolve_overloaded_builtin;	\
 
 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LINK_REGISTER_REGNUM)
 
-#define ARG_POINTER_CFA_OFFSET(FNDECL) (-STACK_POINTER_OFFSET)
+#define ARG_POINTER_CFA_OFFSET(FNDECL) \
+  (crtl->args.pretend_args_size - STACK_POINTER_OFFSET)
 
 
 /* Stack Checking */

gcc/defaults.h

@@ -1086,7 +1086,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 /* On most machines, the CFA coincides with the first incoming parm.  */
 #ifndef ARG_POINTER_CFA_OFFSET
-#define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
+#define ARG_POINTER_CFA_OFFSET(FNDECL) \
+  (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
 #endif
 
 /* On most machines, we use the CFA as DW_AT_frame_base.  */

gcc/doc/tm.texi

@@ -3340,7 +3340,8 @@ final value should coincide with that calculated by
 @code{INCOMING_FRAME_SP_OFFSET}.  Which is unfortunately not usable
 during virtual register instantiation.
 
-The default value for this macro is @code{FIRST_PARM_OFFSET (fundecl)},
+The default value for this macro is
+@code{FIRST_PARM_OFFSET (fundecl) + crtl->args.pretend_args_size},
 which is correct for most machines; in general, the arguments are found
 immediately before the stack frame.  Note that this is not the case on
 some targets that save registers into the caller's frame, such as SPARC