1 //===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the (internal) constant folding interfaces for LLVM. These 11 // interfaces are used by the ConstantExpr::get* methods to automatically fold 12 // constants when possible. 13 // 14 // These operators may return a null object if they don't know how to perform 15 // the specified operation on the specified constant types. 16 // 17 //===----------------------------------------------------------------------===// 18 19 #ifndef CONSTANTFOLDING_H 20 #define CONSTANTFOLDING_H 21 22 #include "llvm/ADT/ArrayRef.h" 23 24 namespace llvm { 25 class Value; 26 class Constant; 27 class Type; 28 29 // Constant fold various types of instruction... 30 Constant *ConstantFoldCastInstruction( 31 unsigned opcode, ///< The opcode of the cast 32 Constant *V, ///< The source constant 33 Type *DestTy ///< The destination type 34 ); 35 Constant *ConstantFoldSelectInstruction(Constant *Cond, 36 Constant *V1, Constant *V2); 37 Constant *ConstantFoldExtractElementInstruction(Constant *Val, Constant *Idx); 38 Constant *ConstantFoldInsertElementInstruction(Constant *Val, Constant *Elt, 39 Constant *Idx); 40 Constant *ConstantFoldShuffleVectorInstruction(Constant *V1, Constant *V2, 41 Constant *Mask); 42 Constant *ConstantFoldExtractValueInstruction(Constant *Agg, 43 ArrayRef<unsigned> Idxs); 44 Constant *ConstantFoldInsertValueInstruction(Constant *Agg, Constant *Val, 45 ArrayRef<unsigned> Idxs); 46 Constant *ConstantFoldBinaryInstruction(unsigned Opcode, Constant *V1, 47 Constant *V2); 48 Constant *ConstantFoldCompareInstruction(unsigned short predicate, 49 Constant *C1, Constant *C2); 50 Constant *ConstantFoldGetElementPtr(Constant *C, bool inBounds, 51 ArrayRef<Constant *> Idxs); 52 Constant *ConstantFoldGetElementPtr(Constant *C, bool inBounds, 53 ArrayRef<Value *> Idxs); 54 } // End llvm namespace 55 56 #endif 57
