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57 lines
2.5 KiB
57 lines
2.5 KiB
4 months ago
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//===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the (internal) constant folding interfaces for LLVM. These
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// interfaces are used by the ConstantExpr::get* methods to automatically fold
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// constants when possible.
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//
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// These operators may return a null object if they don't know how to perform
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// the specified operation on the specified constant types.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_IR_CONSTANTFOLD_H
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#define LLVM_LIB_IR_CONSTANTFOLD_H
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#include "llvm/ADT/Optional.h"
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namespace llvm {
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template <typename T> class ArrayRef;
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class Value;
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class Constant;
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class Type;
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// Constant fold various types of instruction...
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Constant *ConstantFoldCastInstruction(
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unsigned opcode, ///< The opcode of the cast
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Constant *V, ///< The source constant
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Type *DestTy ///< The destination type
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);
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Constant *ConstantFoldSelectInstruction(Constant *Cond,
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Constant *V1, Constant *V2);
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Constant *ConstantFoldExtractElementInstruction(Constant *Val, Constant *Idx);
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Constant *ConstantFoldInsertElementInstruction(Constant *Val, Constant *Elt,
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Constant *Idx);
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Constant *ConstantFoldShuffleVectorInstruction(Constant *V1, Constant *V2,
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ArrayRef<int> Mask);
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Constant *ConstantFoldExtractValueInstruction(Constant *Agg,
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ArrayRef<unsigned> Idxs);
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Constant *ConstantFoldInsertValueInstruction(Constant *Agg, Constant *Val,
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ArrayRef<unsigned> Idxs);
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Constant *ConstantFoldUnaryInstruction(unsigned Opcode, Constant *V);
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Constant *ConstantFoldBinaryInstruction(unsigned Opcode, Constant *V1,
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Constant *V2);
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Constant *ConstantFoldCompareInstruction(unsigned short predicate,
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Constant *C1, Constant *C2);
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Constant *ConstantFoldGetElementPtr(Type *Ty, Constant *C, bool InBounds,
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Optional<unsigned> InRangeIndex,
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ArrayRef<Value *> Idxs);
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} // End llvm namespace
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#endif
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