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//===-- IntrinsicLowering.h - Intrinsic Function Lowering -------*- C++ -*-===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// 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.
#include "llvm/IR/Intrinsics.h"
namespace llvm {
class CallInst;
class Module;
class DataLayout;
class IntrinsicLowering {
const DataLayout &DL;
bool Warned;
explicit IntrinsicLowering(const DataLayout &DL) : DL(DL), Warned(false) {}
/// Add all of the prototypes that might be needed by an intrinsic lowering
/// implementation to be inserted into the module specified.
void AddPrototypes(Module &M);
/// 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);