75b33d6bd5
This is the bugfix to the miscompile mentioned in https://reviews.llvm.org/D132055#3814831. The IR that reproduced the bug is added as the test case in this patch. What this patch does is that, during legality phase instead of checking the phi nodes only in `InnerLoop` and `OuterLoop`, we check phi nodes in all subloops of the `OuterLoop`. Suppose if the loop nest is triply nested, and `InnerLoop` and `OuterLoop` is the middle loop and the outermost loop respectively, we'll check phi nodes in the innermost loop as well, in addition to the ones in the middle and outermost loops. Reviewed By: Meinersbur, #loopoptwg Differential Revision: https://reviews.llvm.org/D134930 |
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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.