On Sun, Sep 15, 2002 at 01:01:38PM +0100, James Stevenson wrote: > > In the function part of the assembly > > file , I noticed that the depending on > > the "SIZE" of the array , it allocates > > memory on stack as shown in the below > > table . > > > > Array Size Actual stack allocation > > > > 0 - 4 = 4 > > 5 - 16 = 24 > > 17 - 32 = 40 > > 33 - 48 = 56 > > 49 - 64 = 72 > > > > Can anybody please explain me , > > what is the reason behind this ? > > > > Why is it that only the required > > amount of stack is not allocated ? > > compilers tend to optimize by keeping the stack aligned > on certin boundries and also some machines always require > that say the stack point must always be on a quad word > boundry. Do you actually use the variable at all ? > a really simple compliler optimizeation is to remove anything that > is not referenced even when you dont use and optimizeation flags. One question remains. What are the 8 extra bytes for? ------------------------------------------------------------------------------- Jan 'Bulb' Hudec <bulb@ucw.cz> -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
