/*===================== begin_copyright_notice ==================================

Copyright (c) 2017 Intel Corporation

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


======================= end_copyright_notice ==================================*/
#pragma once

#include "Compiler/MetaDataUtilsWrapper.h"
#include "Compiler/CodeGenContextWrapper.hpp"

#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/DataLayout.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/InstVisitor.h>
#include <llvm/IR/IRBuilder.h>
#include "llvm/ADT/SmallVector.h"
#include "common/LLVMWarningsPop.hpp"
#include "GenISAIntrinsics/GenIntrinsicInst.h"
#include "Compiler/CISACodeGen/helper.h"
#include "common/IGCIRBuilder.h"

namespace IGC
{
    class CodeGenContext;
}

namespace IGC
{
    class LowPrecisionOpt : public llvm::FunctionPass, public llvm::InstVisitor<LowPrecisionOpt>
    {
    private:
        llvm::IGCIRBuilder<> *m_builder;
        bool m_changed;
        llvm::Function *m_func_llvm_GenISA_DCL_inputVec_f16;
        llvm::Function *m_func_llvm_GenISA_DCL_inputVec_f32;
        llvm::Function *m_currFunction;
        llvm::Function *func_llvm_floor_f32;
        ShaderType shdrType;
        typedef struct _moveBundle
        {
            uint index;
            llvm::GenIntrinsicInst* cInst;
            llvm::FPTruncInst* fpTrunc;
        }moveBundle;
        struct _cmpOperator
        {
            bool operator()(const moveBundle& obj1, const moveBundle& obj2) { return obj1.index > obj2.index; };
        }cmpOperator;
        llvm::SmallVector<moveBundle, 11> bundles;
        bool m_changeSample = false;
        bool m_simplifyAlu = false;
    public:

        static char ID;

        LowPrecisionOpt();

        ~LowPrecisionOpt() {}

        virtual bool runOnFunction(llvm::Function &F) override;

        virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override
        {
            AU.setPreservesCFG();
            AU.addRequired<MetaDataUtilsWrapper>();
            AU.addRequired<CodeGenContextWrapper>();
        }

        virtual llvm::StringRef getPassName() const override
        {
            return "LowPrecisionOpt Pass";
        }

        void visitFPExtInst(llvm::FPExtInst &I);
        void visitFPTruncInst(llvm::FPTruncInst &I);
        void visitIntrinsicInst(llvm::IntrinsicInst &I);
        void visitCallInst(llvm::CallInst &I);
        bool propagateSamplerType(llvm::GenIntrinsicInst &I);
    };
} // namespace IGC
