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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 "common/LLVMWarningsPop.hpp"
namespace IGC {
/// @brief This pass creates annotations for OpenCL program-scope structures.
// Currently this is program-scope constants, but for OpenCL 2.0, it should
// also support program-scope globals.
class ProgramScopeConstantAnalysis : public llvm::ModulePass {
public:
// Pass identification, replacement for typeid
static char ID;
/// @brief Constructor
ProgramScopeConstantAnalysis();
/// @brief Destructor
~ProgramScopeConstantAnalysis() {}
/// @brief Provides name of pass
virtual llvm::StringRef getPassName() const override { return "ProgramScopeConstantAnalysisPass"; }
virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override {
AU.setPreservesCFG();
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
}
/// @brief Main entry point.
/// Runs on all GlobalVariables in this module, finds the constants, and
/// generates annotations for them.
/// @param M The destination module.
virtual bool runOnModule(llvm::Module &M) override;
protected:
typedef std::vector<unsigned char> DataVector;
typedef llvm::MapVector<llvm::GlobalVariable *, int64_t> BufferOffsetMap;
struct PointerOffsetInfo {
unsigned AddressSpaceWherePointerResides;
uint64_t PointerOffsetFromBufferBase;
unsigned AddressSpacePointedTo;
PointerOffsetInfo(unsigned AddressSpaceWherePointerResides, uint64_t PointerOffsetFromBufferBase,
unsigned AddressSpacePointedTo)
: AddressSpaceWherePointerResides(AddressSpaceWherePointerResides),
PointerOffsetFromBufferBase(PointerOffsetFromBufferBase), AddressSpacePointedTo(AddressSpacePointedTo) {}
};
typedef std::list<PointerOffsetInfo> PointerOffsetInfoList;
/// @brief Add data from the inline constant into the buffer.
/// @param initializer The initializer of the constant being added.
/// @param inlineConstantBuffer The buffer the data is being added to.
void addData(llvm::Constant *initializer, InlineProgramScopeBufferType inlineProgramScopeBufferType,
PointerOffsetInfoList &pointerOffsetInfo, BufferOffsetMap &inlineProgramScopeOffsets,
unsigned addressSpace, bool forceAlignmentOne = false);
/// @brief Align the buffer according to the required alignment
/// @param buffer The buffer to align.
/// @param alignment Required alignment in bytes.
void alignBuffer(DataVector &buffer, alignment_t alignment);
const llvm::DataLayout *m_DL = nullptr;
ModuleMetaData *m_pModuleMd = nullptr;
};
} // namespace IGC
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