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annotate lib/IR/ConstantFold.h @ 148:63bd29f05246

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merged
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 19:46:37 +0900
parents c2174574ed3a
children
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1 //===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file defines the (internal) constant folding interfaces for LLVM. These
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10 // interfaces are used by the ConstantExpr::get* methods to automatically fold
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11 // constants when possible.
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12 //
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13 // These operators may return a null object if they don't know how to perform
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14 // the specified operation on the specified constant types.
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15 //
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16 //===----------------------------------------------------------------------===//
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17
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18 #ifndef LLVM_LIB_IR_CONSTANTFOLD_H
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19 #define LLVM_LIB_IR_CONSTANTFOLD_H
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20
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21 #include "llvm/ADT/Optional.h"
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22
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23 namespace llvm {
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24 template <typename T> class ArrayRef;
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25 class Value;
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26 class Constant;
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27 class Type;
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28
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29 // Constant fold various types of instruction...
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30 Constant *ConstantFoldCastInstruction(
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31 unsigned opcode, ///< The opcode of the cast
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32 Constant *V, ///< The source constant
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33 Type *DestTy ///< The destination type
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34 );
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35 Constant *ConstantFoldSelectInstruction(Constant *Cond,
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36 Constant *V1, Constant *V2);
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37 Constant *ConstantFoldExtractElementInstruction(Constant *Val, Constant *Idx);
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38 Constant *ConstantFoldInsertElementInstruction(Constant *Val, Constant *Elt,
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39 Constant *Idx);
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40 Constant *ConstantFoldShuffleVectorInstruction(Constant *V1, Constant *V2,
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41 Constant *Mask);
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42 Constant *ConstantFoldExtractValueInstruction(Constant *Agg,
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43 ArrayRef<unsigned> Idxs);
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44 Constant *ConstantFoldInsertValueInstruction(Constant *Agg, Constant *Val,
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45 ArrayRef<unsigned> Idxs);
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46 Constant *ConstantFoldUnaryInstruction(unsigned Opcode, Constant *V);
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47 Constant *ConstantFoldBinaryInstruction(unsigned Opcode, Constant *V1,
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48 Constant *V2);
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49 Constant *ConstantFoldCompareInstruction(unsigned short predicate,
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50 Constant *C1, Constant *C2);
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51 Constant *ConstantFoldGetElementPtr(Type *Ty, Constant *C, bool InBounds,
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52 Optional<unsigned> InRangeIndex,
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53 ArrayRef<Value *> Idxs);
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54 } // End llvm namespace
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55
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56 #endif