https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81084
--- Comment #45 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Jakub Jelinek from comment #42) > See e.g. https://gcc.gnu.org/onlinedocs/gccint/ > https://gcc.gnu.org/onlinedocs/gccint/#toc-RTL-Representation > https://gcc.gnu.org/onlinedocs/gccint/Machine-Desc.html#Machine-Desc > https://kristerw.blogspot.cz/2017/08/writing-gcc-backend_4.html > and many others. Thank you. > Don't really know how is writing a new backend relevant to > maintaining an existing one. Well, I guess there is no documentation "How to fix an unmaintained target and bring it back into shape.", is there? Documenation which explains how to write a backend should also help fixing an existing one.
