//===- SPIRVLowerBool.h - Bool operand lowering  --------*- C++ -*-===//
//
//                     The LLVM/SPIR-V Translator
//
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//===----------------------------------------------------------------------===//
//
// This file implements lowering instructions with bool operands.
//
//===----------------------------------------------------------------------===//

#ifndef SPIRV_SPIRVLOWERBOOL_H
#define SPIRV_SPIRVLOWERBOOL_H

#include "llvm/IR/InstVisitor.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Pass.h"

namespace SPIRV {

class SPIRVLowerBoolBase : public llvm::InstVisitor<SPIRVLowerBoolBase> {
public:
  SPIRVLowerBoolBase() : Context(nullptr) {}
  virtual ~SPIRVLowerBoolBase() {}
  void replace(llvm::Instruction *I, llvm::Instruction *NewI);
  bool isBoolType(llvm::Type *Ty);
  virtual void visitTruncInst(llvm::TruncInst &I);
  void handleExtInstructions(llvm::Instruction &I);
  void handleCastInstructions(llvm::Instruction &I);
  virtual void visitZExtInst(llvm::ZExtInst &I);
  virtual void visitSExtInst(llvm::SExtInst &I);
  virtual void visitUIToFPInst(llvm::UIToFPInst &I);
  virtual void visitSIToFPInst(llvm::SIToFPInst &I);
  bool runLowerBool(llvm::Module &M);

private:
  llvm::LLVMContext *Context;
};

class SPIRVLowerBoolPass : public llvm::PassInfoMixin<SPIRVLowerBoolPass>,
                           public SPIRVLowerBoolBase {
public:
  llvm::PreservedAnalyses run(llvm::Module &M,
                              llvm::ModuleAnalysisManager &MAM);

  static bool isRequired() { return true; }
};

class SPIRVLowerBoolLegacy : public llvm::ModulePass,
                             public SPIRVLowerBoolBase {
public:
  SPIRVLowerBoolLegacy();
  bool runOnModule(llvm::Module &M) override;

  static char ID;
};

} // namespace SPIRV

#endif // SPIRV_SPIRVLOWERBOOL_H