| //===-- 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CODEGEN_INTRINSICLOWERING_H |
| #define LLVM_CODEGEN_INTRINSICLOWERING_H |
| |
| #include "llvm/IR/Intrinsics.h" |
| |
| namespace llvm { |
| class CallInst; |
| class Module; |
| class DataLayout; |
| |
| class IntrinsicLowering { |
| const DataLayout &DL; |
| |
| bool Warned; |
| |
| public: |
| 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); |
| }; |
| } |
| |
| #endif |