> Sometimes, for performance critical paths, I would like gcc to be dumb and > follow *my* code and not its hard-coded probabilities.
If you really want that, simple: just disable optimization @) > Maybe one thing we would need would be the ability to assign probabilities > to each branch based on what we expect, so that gcc could build a better > tree keeping most frequently used code tight. Just use profile feedback then for user space. I don't think it's a good idea for kernel code though because it leads to unreproducible binaries which would wreck the development model. > Hmm I've just noticed -fno-guess-branch-probability in the man, I never tried > it. Or -fno-reorder-blocks -Andi _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
