* Backporting changes from vmill to remill. One set of changes is to remove DEF_ISEL_SEM, requiring that one use DEF_ISEL and DEF_SEM separately. This makes some simple instruction semantics more tedious to implement. The main goal is for ALL semantics themselves to be treated as private, non-exported symbols. In the case of those semantics defined via DEF_ISEL_SEM, those weren't private, and this inhibited inlining optimizations. Another big change is that function cloning has been rewritten and no longer depends on LLVM's function cloning implementation. Another big change is that the meat of the optimizer has been put into the remill/BC subdirectory and wrapped in a class, enabling it to be used independently of remill-opt. There are some new instruction semantics, and fixes to those. Some new utility functions for iterating over lifted blocks in the module. Attach/detach intrinsics have been removed, as they don't (yet) explicitly fit within the current model. The AssemblyWriter, which would produce a .S file and debug info linking lifted bitcode to the .S file via source line debug info has been removed. Despite it being really cool, the actual benefit is not obvious, given that optimization of the bitcode doesn't actually propagate enough of that information after inlining.
* Eliminate sendfile dependency.
* Implements remill-opt
* Change back to google namespace
* ANother namespace change
* Should fix test runner.
* Try to fix deprecated use of fstat64 on macOS
Peter Goodman