Richard Earnshaw wrote: > A mere 256 bytes for the caller would permit 32 x 8byte arguments on the > stack which, with at least 8 parameters passed in registers, would allow > for calls with 40 parameters. There can't be many in that space. Any > function making calls with more than that might need additional probes, > but that's going to be exceedingly rare. > > Put the cost on the least common sequences, even if they pay > disproportionately - it will be a win over all.
Functions with large outgoing arguments are extremely rare indeed, it tails off really fast after 64 bytes. The only large cases I've seen are from Fortran code - and those cases seem buggy (40KBytes of outgoing args means 5000 double args which is unlikely). Wilco
