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//===- MergedLoadStoreMotion.h - merge and hoist/sink load/stores ---------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // //! \file //! \brief This pass performs merges of loads and stores on both sides of a // diamond (hammock). It hoists the loads and sinks the stores. // // The algorithm iteratively hoists two loads to the same address out of a // diamond (hammock) and merges them into a single load in the header. Similar // it sinks and merges two stores to the tail block (footer). The algorithm // iterates over the instructions of one side of the diamond and attempts to // find a matching load/store on the other side. It hoists / sinks when it // thinks it safe to do so. This optimization helps with eg. hiding load // latencies, triggering if-conversion, and reducing static code size. // //===----------------------------------------------------------------------===// #ifndef LLVM_TRANSFORMS_SCALAR_MERGEDLOADSTOREMOTION_H #define LLVM_TRANSFORMS_SCALAR_MERGEDLOADSTOREMOTION_H #include "llvm/IR/Module.h" #include "llvm/IR/PassManager.h" namespace llvm { class MergedLoadStoreMotionPass : public PassInfoMixin<MergedLoadStoreMotionPass> { public: PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); }; } #endif // LLVM_TRANSFORMS_SCALAR_MERGEDLOADSTOREMOTION_H