Thanks Ian for your help. If I set the frame pointer required hook (using SUBTARGET_FRAME_POINTER_REQUIRED and TARGET_FRAME_POINTER_REQUIRED) it will set the frame-pointer for all the functions..am I correct? I would like to force it to use the frame-pointer for a certain functions in a program that I figure out during compile time. Is there a feature to do this? If one doesn't exist, then how much of a major change is this to the GCC mainline for me to add this functionality?
Thanks, Balaji V. Iyer. -----Original Message----- From: Ian Lance Taylor [mailto:i...@google.com] Sent: Friday, April 08, 2011 6:32 PM To: Iyer, Balaji V Cc: gcc@gcc.gnu.org Subject: Re: Frame Pointer Usage "Iyer, Balaji V" <balaji.v.i...@intel.com> writes: > I have a question regarding using frame pointers. I have a scenario > where I need to use the frame for certain functions and for the other > functions it can optimize it out. I see there is a flag called > "-fno-omit-frame-pointer", which will keep the frame pointer for all the > functions. Is there a way I can keep/remove the frame for a per-function > basis? If this functionality is not present in GCC and if I want to add such > a functionality, where/how should I go about implementing it? That is how gcc behaves anyhow. It will use a frame pointer if it needs one, whether or not -fomit-frame-pointer is in effect. To control this in your backend, see the frame_pointer_required target hook. Ian
