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1 //===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
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.
17 //===----------------------------------------------------------------------===//
19 #ifndef CONSTANTFOLDING_H
20 #define CONSTANTFOLDING_H
22 #include "llvm/ADT/ArrayRef.h"
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
35 Constant
*ConstantFoldSelectInstruction(Constant
*Cond
,
36 Constant
*V1
, Constant
*V2
);
37 Constant
*ConstantFoldExtractElementInstruction(Constant
*Val
, Constant
*Idx
);
38 Constant
*ConstantFoldInsertElementInstruction(Constant
*Val
, Constant
*Elt
,
40 Constant
*ConstantFoldShuffleVectorInstruction(Constant
*V1
, Constant
*V2
,
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
,
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