On 09/23/2015 02:50 PM, Abe wrote:
Dear all,
What, if anything, is the reason I should be using "assign_stack_local"
instead of using "assign_stack_temp",
both from "function.h"? The stack slot in question doesn`t need to hold
its value: it is being used for a scratchpad,
i.e. garbage data; basically, I just need an address for a
big-enough-and-aligned-enough slot which I can safely
corrupt what`s in it. It should be OK from my code`s POV if another
part of the compiler causes a scratchpad
slot to be reused, even if it is reused in the same routine in a single
execution on the target.
If you're allocating your slot late (past the gimple/rtl border), then
there isn't a significant difference (ie, no reuse/sharing the slot).
So if you're lazily allocating the slot, it shouldn't really matter
which you use.
jeff
