What is pass in LLVM?
What is pass in LLVM?
The “Hello” pass is designed to simply print out the name of non-external functions that exist in the program being compiled. It does not modify the program at all, it just inspects it. The source code and files for this pass are available in the LLVM source tree in the lib/Transforms/Hello directory.
How do I make a LLVM pass?
Follow the steps below.
- Create a directory to host your LLVM pass.
- Update the CMake file in the Transforms directory.
- Create a CMake file for your LLVM pass.
- CPP file for your LLVM pass.
- Compiling your first pass.
What is LLVM pass Manager?
What is a pass manager? A pass manager schedules transformation passes and analyses to be run on IR in a specific order. Passes can run on an entire module, a single function, or something more abstract such as a strongly connected component (SCC) in a call graph or a loop inside of a function.
What is SCC in LLVM?
According to The LLVM Lexicon, It stands for “strongly connected component”.
What is LLC in LLVM?
The llc command compiles LLVM source inputs into assembly language for a specified architecture. The assembly language output can then be passed through a native assembler and linker to generate a native executable.
How long does it take to build LLVM?
The server this runs on only has 2 cores, so a full LLVM build can take more than two hours. For smaller changes, building LLVM from ccache and compiling the benchmarks takes about 20 minutes.
What is LLVMContext?
This is an important class for using LLVM in a threaded context. It (opaquely) owns and manages the core “global” data of LLVM’s core infrastructure, including the type and constant uniquing tables. LLVMContext itself provides no locking guarantees, so you should be careful to have one context per thread.
Does LLVM compile to assembly?
