forked from OSchip/llvm-project
96238486ed
X86 matches several 'shift+xor' funnel shift patterns: fold (or (srl (srl x1, 1), (xor y, 31)), (shl x0, y)) -> (fshl x0, x1, y) fold (or (shl (shl x0, 1), (xor y, 31)), (srl x1, y)) -> (fshr x0, x1, y) fold (or (shl (add x0, x0), (xor y, 31)), (srl x1, y)) -> (fshr x0, x1, y) These patterns are also what we end up with the proposed expansion changes in D77301. This patch moves these to DAGCombine's generic MatchFunnelPosNeg. All existing X86 test cases still pass, and we just have a small codegen change in pr32282.ll. Reviewed By: @spatel Differential Revision: https://reviews.llvm.org/D78935 |
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| 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.