ia64.c (ia64_compute_frame_size): Allow inline asm to clobber ar.pfs and ar.unat.

        * config/ia64/ia64.c (ia64_compute_frame_size): Allow inline asm
        to clobber ar.pfs and ar.unat.
        (ia64_expand_prologue): Force alloc instruction if ar.pfs saved;
        fix test for spilling ar.pfs to the stack.

From-SVN: r66074