On Thu, Aug 4, 2011 at 11:50 AM, Andrew Haley <a...@redhat.com> wrote: > On 08/04/2011 01:19 AM, Hans-Peter Nilsson wrote: > >> To make sure, it'd be nice if someone could perhaps grep an >> entire GNU/Linux-or-other distribution including the kernel for >> uses of asm-declared *local* registers that don't directly feed >> into asms and not being the stack-pointer? Or can we get away >> with just saying that local asm registers haven't had any other >> documented meaning for the last seven years? > > It's the sort of thing that gets done in threaded interpreters, > where you really need to keep a few pointers in registers and > the interpreter itself is a very long function. gcc has always > done a dreadful job of register allocation in such cases.
Sure, but what I have seen people use global register variables for this (which means they get taken away from the register allocator). Richard. > Andrew. >
