Hi! On Wed, Jan 22, 2020 at 07:11:27AM +0100, Hans-Peter Nilsson wrote: > I intend to put back as many as I find use for, of those > anonymous patterns in a controlled manner, with self-contained > test-cases proving their usability, rather than symmetry with > other instructions and similar addressing modes, which guided > the original introduction. I've entered prXXXXX to track code > performance regressions related to this transition, with focus > on target-side causes and fixes; besides the function prologue > special-case, there were some checking presence of the bit-test > (btstq) instruction.
That's PR93372 (not XXXXX :-) ). Do you have any estimate how much removing cc0 this way costs in performance (or code size, or any other metric)? Segher
