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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 "Compiler/CodeGenContextWrapper.hpp"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/InstVisitor.h>
#include "common/LLVMWarningsPop.hpp"
namespace IGC
{
/// @brief PrivateMemoryUsageAnalysis pass used for analyzing if functions use private memory.
/// This is done by analyzing the alloca instructions.
class PrivateMemoryUsageAnalysis : public llvm::ModulePass, public llvm::InstVisitor<PrivateMemoryUsageAnalysis>
{
public:
// Pass identification, replacement for typeid
static char ID;
/// @brief Constructor
PrivateMemoryUsageAnalysis();
/// @brief Destructor
~PrivateMemoryUsageAnalysis() {}
/// @brief Provides name of pass
virtual llvm::StringRef getPassName() const override
{
return "PrivateMemoryUsageAnalysis";
}
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
}
/// @brief Main entry point.
/// Runs on all functions defined in the given module, finds all alloca instructions,
/// analyzes them and checks if the functions use private memory.
/// If so, private base implicit argument is added to the implicit arguments of the function
/// @param M The destination module.
virtual bool runOnModule(llvm::Module& M) override;
/// @brief Alloca instructions visitor.
/// Analyzes if there are private memory allocation.
/// @param AI The alloca instruction.
void visitAllocaInst(llvm::AllocaInst& AI);
/// @brief BinaryOperator instructions visitor.
/// Analyzes if there are private memory allocation.
/// @param I The binary op
void visitBinaryOperator(llvm::BinaryOperator& I);
/// @brief CallInst instructions visitor.
/// Analyzes if there are private memory allocation.
/// @param CI The binary op
void visitCallInst(llvm::CallInst& CI);
private:
/// @brief Function entry point.
/// Finds all alloca instructions in this function, analyzes them and adds
/// private base implicit argument if needed.
/// @param F The destination function.
bool runOnFunction(llvm::Function& F);
/// @brief A flag signaling if the current function uses private memory
bool m_hasPrivateMem;
/// @brief A flag signaling if the platform has partial fp64 emulation
bool m_hasDPDivSqrtEmu = false;
/// @brief MetaData utils used to generate LLVM metadata
IGCMD::MetaDataUtils* m_pMDUtils;
};
} // namespace IGC
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