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This patch moves the allocation of VectorParts for PHI nodes into the actual PHI widening code. Previously, we allocated these VectorParts in vectorizeBlockInLoop, and passed them by reference to widenPHIInstruction. Upon returning, we would then map the VectorParts in VectorLoopValueMap. This behavior is problematic for the cases where we only want to generate a scalar version of a PHI node. For example, if in the future we only generate a scalar version of an induction variable, we would end up inserting an empty vector entry into the map once we return to vectorizeBlockInLoop. We now no longer need to pass VectorParts to the various PHI widening functions, and we can keep VectorParts allocation as close as possible to the point at which they are actually mapped in VectorLoopValueMap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280390 91177308-0d34-0410-b5e6-96231b3b80d8 |
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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.