PING [Patch][Middle-end]Add -fzero-call-used-regs=[skip|used-gpr|all-gpr|used|all]

[Segher Boessenkool]

On Fri, Sep 04, 2020 at 01:23:14AM +0000, Rodriguez Bahena, Victor wrote:
> Qing, thanks a lot for the measurement, I am not sure if this is the limit of overhead the community is willing to accept by adding extra security (me as gcc user will be willing to accept). 

The overhead is of course bearable for most programs / users, but what
is the return?  For what percentage of programs are ROP attacks no
longer possible, for example.


Segher