1//===-- GenericValue.h - Represent any type of LLVM value -------*- 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// The GenericValue class is used to represent an LLVM value of arbitrary type.
11//
12//===----------------------------------------------------------------------===//
13
14
15#ifndef LLVM_EXECUTIONENGINE_GENERICVALUE_H
16#define LLVM_EXECUTIONENGINE_GENERICVALUE_H
17
18#include "llvm/ADT/APInt.h"
19#include "llvm/Support/DataTypes.h"
20
21namespace llvm {
22
23typedef void* PointerTy;
24class APInt;
25
26struct GenericValue {
27  struct IntPair {
28    unsigned int first;
29    unsigned int second;
30  };
31  union {
32    double          DoubleVal;
33    float           FloatVal;
34    PointerTy       PointerVal;
35    struct IntPair  UIntPairVal;
36    unsigned char   Untyped[8];
37  };
38  APInt IntVal;   // also used for long doubles.
39  // For aggregate data types.
40  std::vector<GenericValue> AggregateVal;
41
42  // to make code faster, set GenericValue to zero could be omitted, but it is
43  // potentially can cause problems, since GenericValue to store garbage
44  // instead of zero.
45  GenericValue() : IntVal(1,0) {UIntPairVal.first = 0; UIntPairVal.second = 0;}
46  explicit GenericValue(void *V) : PointerVal(V), IntVal(1,0) { }
47};
48
49inline GenericValue PTOGV(void *P) { return GenericValue(P); }
50inline void* GVTOP(const GenericValue &GV) { return GV.PointerVal; }
51
52} // End llvm namespace.
53#endif
54