[CFT] re-organize var-tracking frame_base

[Richard Henderson]

On Thu, Sep 08, 2005 at 01:06:55PM -0700, Steve Ellcey wrote:
> /* Base register for access to arguments of the function.  */
> #define ARG_POINTER_REGNUM (TARGET_64BIT ? 29 : 3)

So you've got a non-eliminable argument pointer.

Does this mean that __builtin_dwarf_cfa doesn't work on this target?
If not, how does unwinding work?  If it does work, how?


r~