Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===-- IntrinsicLowering.h - Intrinsic Function Lowering -------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// This file defines the IntrinsicLowering interface.  This interface allows

// addition of domain-specific or front-end specific intrinsics to LLVM without

// having to modify all of the C backend or interpreter.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_INTRINSICLOWERING_H

#define LLVM_CODEGEN_INTRINSICLOWERING_H

namespace llvm {

class CallInst;

class DataLayout;

class IntrinsicLowering {

  const DataLayout &DL;

  bool Warned = false;

public:

  explicit IntrinsicLowering(const DataLayout &DL) : DL(DL) {}

  /// Replace a call to the specified intrinsic function.

  /// If an intrinsic function must be implemented by the code generator

  /// (such as va_start), this function should print a message and abort.

  ///

  /// Otherwise, if an intrinsic function call can be lowered, the code to

  /// implement it (often a call to a non-intrinsic function) is inserted

  /// _after_ the call instruction and the call is deleted. The caller must

  /// be capable of handling this kind of change.

  void LowerIntrinsicCall(CallInst *CI);

  /// Try to replace a call instruction with a call to a bswap intrinsic. Return

  /// false if the call is not a simple integer bswap.

  static bool LowerToByteSwap(CallInst *CI);

};

}

#endif