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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "Compiler/MetaDataUtilsWrapper.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/DataLayout.h>
#include <llvm/ADT/MapVector.h>
#include <llvm/ADT/SetVector.h>
#include <llvm/ADT/StringRef.h>
#include <llvm/Analysis/CallGraph.h>
#include "common/LLVMWarningsPop.hpp"
#include <map>
#include <set>
#include <unordered_set>
namespace IGC
{
typedef llvm::SetVector<llvm::GlobalVariable*> GlobalVariableSet;
/// @brief This pass resolves references to inline local address space variables
class InlineLocalsResolution : public llvm::ModulePass
{
public:
// Pass identification, replacement for typeid
static char ID;
/// @brief Constructor
InlineLocalsResolution();
/// @brief Destructor
~InlineLocalsResolution() {}
/// @brief Provides name of pass
virtual llvm::StringRef getPassName() const override
{
return "InlineLocalsResolutionPass";
}
/// @brief Main entry point.
/// @param M The destination module.
virtual bool runOnModule(llvm::Module& M) override;
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.setPreservesCFG();
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
AU.addRequired<llvm::CallGraphWrapperPass>();
}
// It is convenient to represent the null pointer as the zero
// bit-pattern. However, SLM address 0 is legal, and we want to be able
// to use it.
// To go around this, we use the fact only the low 16 bits ("low nibble")
// of SLM addresses are significant, and set all valid pointers to have
// a non-zero high nibble.
static const unsigned int VALID_LOCAL_HIGH_BITS;
protected:
void filterGlobals(llvm::Module&);
bool unusedGlobal(llvm::Value* V, std::unordered_set<llvm::Value*>& unusedNodes);
void collectInfoOnSharedLocalMem(llvm::Module&);
void computeOffsetList(llvm::Module&, llvm::MapVector<llvm::Function*, unsigned int>&);
void traverseCGN(const llvm::CallGraphNode&);
private:
llvm::MapVector<llvm::Function*, GlobalVariableSet> m_FuncToVarsMap;
llvm::MapVector<llvm::Function*, unsigned int> m_FuncToMemPoolSizeMap;
std::set<llvm::Function*> m_chkSet;
llvm::GlobalVariable* m_pGV;
};
} // namespace IGC
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