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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "AdaptorCommon/ImplicitArgs.hpp"
#include "Compiler/MetaDataUtilsWrapper.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/Analysis/CallGraph.h>
#include "common/LLVMWarningsPop.hpp"
#include <set>
#include <map>
namespace IGC
{
class CodeGenContext;
}
namespace IGC
{
// struct
typedef std::map<unsigned int, llvm::Argument*> InfoToImpArgMap;
typedef std::map<llvm::Function*, InfoToImpArgMap> FuncInfoToImpArgMap;
typedef std::map<llvm::Argument*, unsigned int> ImpArgToExpNum;
typedef std::map<llvm::Function*, ImpArgToExpNum> FuncImpToExpNumMap;
/// @brief AddImplicitArgs pass used for changing the function signatures and calls to represent
/// the implicit arguments needed by each function and passed from the OpenCL runtime
/// This pass depdends on the WIFuncAnalysis pass runing before it
/// @Author Marina Yatsina
class AddImplicitArgs : public llvm::ModulePass
{
public:
// Pass identification, replacement for typeid
static char ID;
/// @brief Constructor
AddImplicitArgs();
/// @brief Destructor
~AddImplicitArgs() {}
/// @brief Provides name of pass
virtual llvm::StringRef getPassName() const override
{
return "AddImplictArgs";
}
virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override
{
AU.addRequired<CodeGenContextWrapper>();
AU.addRequired<MetaDataUtilsWrapper>();
}
/// @brief Main entry point.
/// Goes over all functions and changes their signature to contain the implicit arguments
/// needed by each function, goes over all function calls and adds the implicit arguments
/// to the function calls
/// @param M The destination module.
virtual bool runOnModule(llvm::Module &M) override;
/// @brief Check if a function has a stackcall in its call path to
/// decide whether implicit args should be added
/// @param pFunc Source function
static bool hasStackCallInCG(const llvm::Function* pFunc, const CodeGenContext& Ctx);
private:
/// @brief Create the type of the new function,
/// including all explicit and needed impliict parameters
/// @param pFunc The old function
/// @param pImplicitArgs The implicit arguments needed by this function
/// @returns The new function type
static llvm::FunctionType* getNewFuncType(const llvm::Function* pFunc, const ImplicitArgs& implicitArgs);
/// @brief Transfers uses of old arguments to new arguments, sets names of all arguments
/// @param pFunc The old function
/// @param pNewFunc The new function
/// @param pImplicitArgs The implicit arguments needed by this function
void updateNewFuncArgs(llvm::Function* pFunc, llvm::Function* pNewFunc, const ImplicitArgs& implicitArgs);
/// @brief Replace old CallInst with new CallInst
void replaceAllUsesWithNewOCLBuiltinFunction(llvm::Function* old_func, llvm::Function* new_func);
static llvm::Value* coerce(llvm::Value* arg, llvm::Type* type, llvm::Instruction* insertBefore);
/// @brief Metadata API object.
IGC::IGCMD::MetaDataUtils *m_pMdUtils;
FuncInfoToImpArgMap m_FuncInfoToImpArgMap;
FuncImpToExpNumMap m_FuncImpToExpNumMap;
};
} // namespace IGC
// Builtin CallGraph Analysis Class
namespace IGC
{
struct ImplicitArgumentDetail
{
ImplicitArg::ArgMap ArgsMaps;
std::set<unsigned int> StructArgSet;
};
class BuiltinCallGraphAnalysis : public llvm::ModulePass
{
public:
static char ID;
BuiltinCallGraphAnalysis();
~BuiltinCallGraphAnalysis() {}
virtual llvm::StringRef getPassName() const override
{
return "BuiltinCallGraphAnalysis";
}
void getAnalysisUsage(llvm::AnalysisUsage &AU) const override
{
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
AU.addRequired<llvm::CallGraphWrapperPass>();
}
virtual bool runOnModule(llvm::Module &M) override;
void traverseCallGraphSCC(const std::vector<llvm::CallGraphNode *> &SCCNodes);
void combineTwoArgDetail(ImplicitArgumentDetail&, const ImplicitArgumentDetail&, llvm::Value*) const;
void writeBackAllIntoMetaData(const ImplicitArgumentDetail&, llvm::Function*);
bool pruneCallGraphForStackCalls(llvm::CallGraph& CG);
private:
IGC::IGCMD::MetaDataUtils *m_pMdUtils;
llvm::SmallDenseMap<llvm::Function*, ImplicitArgumentDetail *> argMap;
llvm::SmallVector<std::unique_ptr<ImplicitArgumentDetail>, 4> argDetails;
};
} // namespace IGC
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