This commit removes the "set frame pointer" unwind code and frame pointer information from Windows x64 unwind information. In Windows x64 unwind information, a "frame pointer" is actually the *base address* of the static part of the local frame and would be at some negative offset to RSP upon establishing the frame pointer. Currently Cranelift uses a "traditional" notion of a frame pointer, one that is the highest address in the local frame (i.e. pointing at the previous frame pointer on the stack). Windows x64 unwind doesn't describe such frame pointers and only needs one described if the frame contains a dynamic stack allocation. Fixes #1967.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.