https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94743
--- Comment #11 from Christophe Lyon <clyon at gcc dot gnu.org> --- (In reply to Richard Earnshaw from comment #10) > (In reply to Christophe Lyon from comment #9) > > > My initial thoughts are along the lines of... > > > Only try to save FP registers that this function directly clobbers. > > What's the point of saving these if a callee clobbers other registers? > > > > They need to be done early enough to ensure that any code in *this* function > does not clobber them. Any additional registers would have to be saved by a > library call that does that. > Why do we need a library function for that? It would have to be special with the stack: push FP registers, but do not restore SP, so that the dual restore function can pop them and restore SP.
