TPDE is a fast compiler back-end framework that adapts to existing SSA IRs. The primary goal is low-latency compilation while maintaining reasonable (-O0) code quality, e.g., as baseline compiler for JIT compilation or unoptimized builds. Currently, TPDE only targets ELF-based x86-64 and AArch64 (Armv8.1) platforms.

This repository contains:

TPDE: the core compiler framework.
TPDE-Encodegen: a utility for easing the use of TPDE by deriving code generators through LLVM's Machine IR.
TPDE-LLVM: a standalone back-end for LLVM-IR, which compiles 10–20x faster than LLVM -O0 with similar code quality, usable as library (e.g., for JIT), as tool (tpde-llc), and integrated in Clang/Flang (with a patch).

Getting Started

Requirements/external dependencies:

GNU-compatible C++20 compiler (e.g., Clang 19+, GCC 14+)
LLVM/Clang 19.1 or 20.1 (only for tests, TPDE-LLVM and TPDE-Encodegen)
- Prefer LLVM 19.1. LLVM 20.1 should work, but tests will fail due to different code generation.
- Note: for tests, also the LLVM tools (lit, llc, llvm-objdump, FileCheck, etc.) are required.
Python 3.10+
Other dependencies are bundled as submodules.

It is possible to build and use the core TPDE framework without LLVM (-DTPDE_ENABLE_ENCODEGEN=OFF -DTPDE_ENABLE_LLVM=OFF -DTPDE_INCLUDE_TESTS=OFF).

# Clone recursive due to submodules
git clone https://github.com/tpde2/tpde.git --recursive
cd tpde
# Configure
cmake -B build -G Ninja -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang
# Compile
cmake --build build
# Optionally: run tests
cmake --build build --target check-tpde

Publications

Tobias Schwarz, Tobias Kamm, and Alexis Engelke. TPDE: A Fast Adaptable Compiler Back-End Framework. arXiv:2505.22610 [cs.PL]. 2025.

License

Generally: Apache-2.0 WITH LLVM-exception. (Detailed license information is attached to every file. Dependencies may have different licenses.)