forked from OSchip/llvm-project
2ed15984b4
fshl (or X, Y), X, C ==/!= 0 --> or (shl Y, C), X ==/!= 0 fshl X, (or X, Y), C ==/!= 0 --> or (srl Y, BW-C), X ==/!= 0 This is similar to an existing setcc-of-rotate fold, but the matching requires more checks for the more general funnel op: https://alive2.llvm.org/ce/z/Ab2jDd We are effectively decomposing the funnel shift into logical shifts, reassociating, and removing a shift. This should get us the final improvements for x86-64 that were originally shown in D111530 ( https://github.com/llvm/llvm-project/issues/49541 ); x86-32 still shows some SHLD/SHRD, so the pattern is not matching there yet. Differential Revision: https://reviews.llvm.org/D122919 |
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| include | ||
| lib | ||
| projects | ||
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| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .clang-format | ||
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| CODE_OWNERS.TXT | ||
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| LICENSE.TXT | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
| configure | ||
| llvm.spec.in | ||
README.txt
The LLVM Compiler Infrastructure ================================ 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.