On 09/22/17 09:32, Ingo Molnar wrote: > > BTW., I think things improved with ORC because with ORC we have RBP as an > extra > register and with PIE we lose RBX - so register pressure in code generation > is > lower. >
We lose EBX on 32 bits, but we don't lose RBX on 64 bits - since x86-64 has RIP-relative addressing there is no need for a dedicated PIC register. I'm somewhat confused how we can have as much as almost 1% overhead. I suspect that we end up making a GOT and maybe even a PLT for no good reason. -hpa _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel