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/*========================== begin_copyright_notice ============================
Copyright (C) 2019-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/InstVisitor.h>
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/MetaDataUtilsWrapper.h"
#include "Compiler/CodeGenContextWrapper.hpp"
#include "GenISAIntrinsics/GenIntrinsicInst.h"
#include <set>
#include <unordered_map>
namespace IGC
{
class PromoteStatelessToBindless : public llvm::FunctionPass, public llvm::InstVisitor<PromoteStatelessToBindless>
{
public:
static char ID;
PromoteStatelessToBindless();
virtual llvm::StringRef getPassName() const override
{
return "PromoteStatelessToBindless";
}
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.addRequired<IGC::MetaDataUtilsWrapper>();
AU.addRequired<IGC::CodeGenContextWrapper>();
AU.setPreservesCFG();
}
bool runOnFunction(llvm::Function& F) override;
void visitInstruction(llvm::Instruction& I);
private:
void GetAccessInstToSrcPointerMap(llvm::Instruction* inst, llvm::Value* resourcePtr);
void PromoteStatelessToBindlessBuffers(llvm::Function& F) const;
void CheckPrintfBuffer(llvm::Function& F);
// Pair of bindless resource access instructions.
// The first is the actual instruction accessing the bindless buffer (load/store/etc)
// The second is the instruction accessing the address of the bindless buffer, which may or may not
// be identical to the first. Needed to convert to null address.
typedef std::pair<llvm::Value*, llvm::Value*> BindlessAccessInsts;
// Map of the srcPtr (kernel arg resource) to a vector of instructions accessing it
llvm::DenseMap<llvm::Value*, llvm::SmallVector<BindlessAccessInsts, 8>> m_SrcPtrToAccessMap;
// Tracks the set of resources that must have at least one stateless access
std::set<llvm::Value*> m_SrcPtrNeedStatelessAccess;
llvm::Value* m_PrintfBuffer;
};
} // namespace IGC
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