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annotate include/llvm/CodeGen/IntrinsicLowering.h @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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1 //===-- IntrinsicLowering.h - Intrinsic Function Lowering -------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file defines the IntrinsicLowering interface. This interface allows
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11 // addition of domain-specific or front-end specific intrinsics to LLVM without
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12 // having to modify all of the C backend or interpreter.
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13 //
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14 //===----------------------------------------------------------------------===//
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15
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16 #ifndef LLVM_CODEGEN_INTRINSICLOWERING_H
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17 #define LLVM_CODEGEN_INTRINSICLOWERING_H
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18
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19 #include "llvm/IR/Intrinsics.h"
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20
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21 namespace llvm {
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22 class CallInst;
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23 class Module;
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24 class DataLayout;
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25
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26 class IntrinsicLowering {
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27 const DataLayout& TD;
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28
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29
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30 bool Warned;
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31 public:
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32 explicit IntrinsicLowering(const DataLayout &td) :
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33 TD(td), Warned(false) {}
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34
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35 /// AddPrototypes - This method, if called, causes all of the prototypes
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36 /// that might be needed by an intrinsic lowering implementation to be
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37 /// inserted into the module specified.
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38 void AddPrototypes(Module &M);
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39
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40 /// LowerIntrinsicCall - This method replaces a call with the LLVM function
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41 /// which should be used to implement the specified intrinsic function call.
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42 /// If an intrinsic function must be implemented by the code generator
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43 /// (such as va_start), this function should print a message and abort.
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44 ///
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45 /// Otherwise, if an intrinsic function call can be lowered, the code to
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46 /// implement it (often a call to a non-intrinsic function) is inserted
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47 /// _after_ the call instruction and the call is deleted. The caller must
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48 /// be capable of handling this kind of change.
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49 ///
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50 void LowerIntrinsicCall(CallInst *CI);
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51
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52 /// LowerToByteSwap - Replace a call instruction into a call to bswap
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53 /// intrinsic. Return false if it has determined the call is not a
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54 /// simple integer bswap.
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55 static bool LowerToByteSwap(CallInst *CI);
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56 };
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57 }
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58
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59 #endif