On Tue, Aug 21, 2012 at 2:10 PM, Tomasz Jankowski <tomcioj@xxxxxxxxx> wrote: > > I'm investigating where to start and I'm overwhelmed with compilation > process, so I'd like to ask you on which passes I should focus and > where I actually should start. > > I have to find arithmetical operations in input source code and > implement them using specific processor instructions on my CPU. That sounds like a machine-specific issue that could be implemented in your CPU.md file. It depends on what you mean by "arithmetical operations," I suppose. > First of all I don't see any pass related to RTL representation in GCC > plugin events (file plugin.def), so is it possible to create GC plugin > modifying RTL representation at all? Call register_pass. > 1. Add somehow (so far I don't know how) custom CPU instructions to GCC code. Adding new CPU instructions is entirely a function of the CPU.md file. That is something that you can not do using a plugin. > 2. Operate on RTL representation of basic blocks (I can modify RTL > representations by adding and removing instructions?). Yes. Ian
