On 27 March 2014 11:33, Jakub Jelinek <ja...@redhat.com> wrote:
> Sure, normally register keyword is just a hint, that e.g. GCC I think
> ignores whenever optimizing (for -O0 it means a variable doesn't have to
> be allocated on the stack), but when it is part of the GNU global/local
> register
> variable extension (i.e. there is both register keyword and
> asm ("<registername>"), then register is not a mere hint, but a requirement.
Yes, I know. That's why I said it was a "joint issue" of that AND the
IR problem. The extension syntax is clear and precise.
> E.g. glibc uses such inline asms for inline syscalls heavily, other projects
> similarly.
Good to know. I had plans of compiling glibc with LLVM soon, and this
might just be another strong point towards implementing named
registers in LLVM.
Thanks,
--renato
