mirror of
https://github.com/RPCS3/llvm.git
synced 2025-01-10 06:03:52 +00:00
Old fork of llvm-mirror, used on older RPCS3 builds
2e76b8570f
The introduction of parameterized register classes in r313271 caused the matcher generation code in TableGen to run much slower, particularly so in the unoptimized (debug) build. This patch recovers some of the lost performance. Summary of changes: - Cache the set of legal types in TypeInfer::getLegalTypes. The contents of this set do not change. - Add LLVM_ATTRIBUTE_ALWAYS_INLINE to several small functions. Normally this would not be necessary, but in the debug build TableGen is not optimized, so this helps a little bit. - Add an early exit from TypeSetByHwMode::operator== for the case when one or both arguments are "simple", i.e. only have one mode. This saves some time in GenerateVariants. - Finally, replace the underlying storage type in TypeSetByHwMode::SetType with MachineValueTypeSet based on std::array instead of std::set. This significantly reduces the number of memory allocation calls. I've done a number of experiments with the underlying type of InfoByHwMode. The type is a map, and for targets that do not use the parameterization, this map has only one entry. The best (unoptimized) performance, somewhat surprisingly came from std::map, followed closely by std::unordered_map. DenseMap was the slowest by a large margin. Various hand-crafted solutions (emulating enough of the map interface not to make sweeping changes to the users) did not yield any observable improvements. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313647 91177308-0d34-0410-b5e6-96231b3b80d8 |
||
|---|---|---|
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| projects | ||
| resources | ||
| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .arcconfig | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| configure | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| llvm.spec.in | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.