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5c1e9c39ef
1. Make the arguments const like the other ConstantFold* functions. 2. Clean up evaluateFCmpRelation so it makes sense for floating point. 3. Implement the use of evaluateFCmpRelation to fold floating point CEs 4. Shorten a variable name so more things fit on one line. 5. Fix various comments. llvm-svn: 32759
56 lines
2.4 KiB
C++
56 lines
2.4 KiB
C++
//===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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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 I don't know how to perform the
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// specified operation on the specified constant types.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CONSTANTFOLDING_H
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#define CONSTANTFOLDING_H
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#include <vector>
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namespace llvm {
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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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const Constant *V, ///< The source constant
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const Type *DestTy ///< The destination type
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);
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Constant *ConstantFoldSelectInstruction(const Constant *Cond,
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const Constant *V1,
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const Constant *V2);
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Constant *ConstantFoldExtractElementInstruction(const Constant *Val,
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const Constant *Idx);
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Constant *ConstantFoldInsertElementInstruction(const Constant *Val,
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const Constant *Elt,
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const Constant *Idx);
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Constant *ConstantFoldShuffleVectorInstruction(const Constant *V1,
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const Constant *V2,
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const Constant *Mask);
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Constant *ConstantFoldBinaryInstruction(unsigned Opcode, const Constant *V1,
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const Constant *V2);
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Constant *ConstantFoldCompareInstruction(unsigned short predicate,
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const Constant *C1,
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const Constant *C2);
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Constant *ConstantFoldGetElementPtr(const Constant *C,
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const std::vector<Value*> &IdxList);
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} // End llvm namespace
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#endif
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