OperationKinds.h revision 7a7ee3033e44b45630981355460ef89efa0bdcc4 
1//===- OperationKinds.h - Operation enums -----------------------*- 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 enumerates the different kinds of operations that can be
11// performed by various expressions.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_AST_OPERATION_KINDS_H
16#define LLVM_CLANG_AST_OPERATION_KINDS_H
17
18namespace clang {
19
20/// CastKind - The kind of operation required for a conversion.
21enum CastKind {
22  /// CK_Dependent - A conversion which cannot yet be analyzed because
23  /// either the expression or target type is dependent.  These are
24  /// created only for explicit casts; dependent ASTs aren't required
25  /// to even approximately type-check.
26  ///   (T*) malloc(sizeof(T))
27  ///   reinterpret_cast<intptr_t>(A<T>::alloc());
28  CK_Dependent,
29
30  /// CK_BitCast - A conversion which causes a bit pattern of one type
31  /// to be reinterpreted as a bit pattern of another type.  Generally
32  /// the operands must have equivalent size and unrelated types.
33  ///
34  /// The pointer conversion char* -> int* is a bitcast.  A conversion
35  /// from any pointer type to a C pointer type is a bitcast unless
36  /// it's actually BaseToDerived or DerivedToBase.  A conversion to a
37  /// block pointer or ObjC pointer type is a bitcast only if the
38  /// operand has the same type kind; otherwise, it's one of the
39  /// specialized casts below.
40  ///
41  /// Vector coercions are bitcasts.
42  CK_BitCast,
43
44  /// CK_LValueBitCast - A conversion which reinterprets the address of
45  /// an l-value as an l-value of a different kind.  Used for
46  /// reinterpret_casts of l-value expressions to reference types.
47  ///    bool b; reinterpret_cast<char&>(b) = 'a';
48  CK_LValueBitCast,
49
50  /// CK_LValueToRValue - A conversion which causes the extraction of
51  /// an r-value from the operand gl-value.  The result of an r-value
52  /// conversion is always unqualified.
53  CK_LValueToRValue,
54
55  /// CK_NoOp - A conversion which does not affect the type other than
56  /// (possibly) adding qualifiers.
57  ///   int    -> int
58  ///   char** -> const char * const *
59  CK_NoOp,
60
61  /// CK_BaseToDerived - A conversion from a C++ class pointer/reference
62  /// to a derived class pointer/reference.
63  ///   B *b = static_cast<B*>(a);
64  CK_BaseToDerived,
65
66  /// CK_DerivedToBase - A conversion from a C++ class pointer
67  /// to a base class pointer.
68  ///   A *a = new B();
69  CK_DerivedToBase,
70
71  /// CK_UncheckedDerivedToBase - A conversion from a C++ class
72  /// pointer/reference to a base class that can assume that the
73  /// derived pointer is not null.
74  ///   const A &a = B();
75  ///   b->method_from_a();
76  CK_UncheckedDerivedToBase,
77
78  /// CK_Dynamic - A C++ dynamic_cast.
79  CK_Dynamic,
80
81  /// CK_ToUnion - The GCC cast-to-union extension.
82  ///   int   -> union { int x; float y; }
83  ///   float -> union { int x; float y; }
84  CK_ToUnion,
85
86  /// CK_ArrayToPointerDecay - Array to pointer decay.
87  ///   int[10] -> int*
88  ///   char[5][6] -> char(*)[6]
89  CK_ArrayToPointerDecay,
90
91  /// CK_FunctionToPointerDecay - Function to pointer decay.
92  ///   void(int) -> void(*)(int)
93  CK_FunctionToPointerDecay,
94
95  /// CK_NullToPointer - Null pointer constant to pointer, ObjC
96  /// pointer, or block pointer.
97  ///   (void*) 0
98  ///   void (^block)() = 0;
99  CK_NullToPointer,
100
101  /// CK_NullToMemberPointer - Null pointer constant to member pointer.
102  ///   int A::*mptr = 0;
103  ///   int (A::*fptr)(int) = nullptr;
104  CK_NullToMemberPointer,
105
106  /// CK_BaseToDerivedMemberPointer - Member pointer in base class to
107  /// member pointer in derived class.
108  ///   int B::*mptr = &A::member;
109  CK_BaseToDerivedMemberPointer,
110
111  /// CK_DerivedToBaseMemberPointer - Member pointer in derived class to
112  /// member pointer in base class.
113  ///   int A::*mptr = static_cast<int A::*>(&B::member);
114  CK_DerivedToBaseMemberPointer,
115
116  /// CK_MemberPointerToBoolean - Member pointer to boolean.  A check
117  /// against the null member pointer.
118  CK_MemberPointerToBoolean,
119
120  /// CK_UserDefinedConversion - Conversion using a user defined type
121  /// conversion function.
122  ///    struct A { operator int(); }; int i = int(A());
123  CK_UserDefinedConversion,
124
125  /// CK_ConstructorConversion - Conversion by constructor.
126  ///    struct A { A(int); }; A a = A(10);
127  CK_ConstructorConversion,
128
129  /// CK_IntegralToPointer - Integral to pointer.  A special kind of
130  /// reinterpreting conversion.  Applies to normal, ObjC, and block
131  /// pointers.
132  ///    (char*) 0x1001aab0
133  ///    reinterpret_cast<int*>(0)
134  CK_IntegralToPointer,
135
136  /// CK_PointerToIntegral - Pointer to integral.  A special kind of
137  /// reinterpreting conversion.  Applies to normal, ObjC, and block
138  /// pointers.
139  ///    (intptr_t) "help!"
140  CK_PointerToIntegral,
141
142  /// CK_PointerToBoolean - Pointer to boolean conversion.  A check
143  /// against null.  Applies to normal, ObjC, and block pointers.
144  CK_PointerToBoolean,
145
146  /// CK_ToVoid - Cast to void, discarding the computed value.
147  ///    (void) malloc(2048)
148  CK_ToVoid,
149
150  /// CK_VectorSplat - A conversion from an arithmetic type to a
151  /// vector of that element type.  Fills all elements ("splats") with
152  /// the source value.
153  ///    __attribute__((ext_vector_type(4))) int v = 5;
154  CK_VectorSplat,
155
156  /// CK_IntegralCast - A cast between integral types (other than to
157  /// boolean).  Variously a bitcast, a truncation, a sign-extension,
158  /// or a zero-extension.
159  ///    long l = 5;
160  ///    (unsigned) i
161  CK_IntegralCast,
162
163  /// CK_IntegralToBoolean - Integral to boolean.  A check against zero.
164  ///    (bool) i
165  CK_IntegralToBoolean,
166
167  /// CK_IntegralToFloating - Integral to floating point.
168  ///    float f = i;
169  CK_IntegralToFloating,
170
171  /// CK_FloatingToIntegral - Floating point to integral.  Rounds
172  /// towards zero, discarding any fractional component.
173  ///    (int) f
174  CK_FloatingToIntegral,
175
176  /// CK_FloatingToBoolean - Floating point to boolean.
177  ///    (bool) f
178  CK_FloatingToBoolean,
179
180  /// CK_FloatingCast - Casting between floating types of different size.
181  ///    (double) f
182  ///    (float) ld
183  CK_FloatingCast,
184
185  /// CK_CPointerToObjCPointerCast - Casting a C pointer kind to an
186  /// Objective-C pointer.
187  CK_CPointerToObjCPointerCast,
188
189  /// CK_BlockPointerToObjCPointerCast - Casting a block pointer to an
190  /// ObjC pointer.
191  CK_BlockPointerToObjCPointerCast,
192
193  /// CK_AnyPointerToBlockPointerCast - Casting any non-block pointer
194  /// to a block pointer.  Block-to-block casts are bitcasts.
195  CK_AnyPointerToBlockPointerCast,
196
197  /// \brief Converting between two Objective-C object types, which
198  /// can occur when performing reference binding to an Objective-C
199  /// object.
200  CK_ObjCObjectLValueCast,
201
202  /// \brief A conversion of a floating point real to a floating point
203  /// complex of the original type.  Injects the value as the real
204  /// component with a zero imaginary component.
205  ///   float -> _Complex float
206  CK_FloatingRealToComplex,
207
208  /// \brief Converts a floating point complex to floating point real
209  /// of the source's element type.  Just discards the imaginary
210  /// component.
211  ///   _Complex long double -> long double
212  CK_FloatingComplexToReal,
213
214  /// \brief Converts a floating point complex to bool by comparing
215  /// against 0+0i.
216  CK_FloatingComplexToBoolean,
217
218  /// \brief Converts between different floating point complex types.
219  ///   _Complex float -> _Complex double
220  CK_FloatingComplexCast,
221
222  /// \brief Converts from a floating complex to an integral complex.
223  ///   _Complex float -> _Complex int
224  CK_FloatingComplexToIntegralComplex,
225
226  /// \brief Converts from an integral real to an integral complex
227  /// whose element type matches the source.  Injects the value as
228  /// the real component with a zero imaginary component.
229  ///   long -> _Complex long
230  CK_IntegralRealToComplex,
231
232  /// \brief Converts an integral complex to an integral real of the
233  /// source's element type by discarding the imaginary component.
234  ///   _Complex short -> short
235  CK_IntegralComplexToReal,
236
237  /// \brief Converts an integral complex to bool by comparing against
238  /// 0+0i.
239  CK_IntegralComplexToBoolean,
240
241  /// \brief Converts between different integral complex types.
242  ///   _Complex char -> _Complex long long
243  ///   _Complex unsigned int -> _Complex signed int
244  CK_IntegralComplexCast,
245
246  /// \brief Converts from an integral complex to a floating complex.
247  ///   _Complex unsigned -> _Complex float
248  CK_IntegralComplexToFloatingComplex,
249
250  /// \brief [ARC] Produces a retainable object pointer so that it may
251  /// be consumed, e.g. by being passed to a consuming parameter.
252  /// Calls objc_retain.
253  CK_ARCProduceObject,
254
255  /// \brief [ARC] Consumes a retainable object pointer that has just
256  /// been produced, e.g. as the return value of a retaining call.
257  /// Enters a cleanup to call objc_release at some indefinite time.
258  CK_ARCConsumeObject,
259
260  /// \brief [ARC] Reclaim a retainable object pointer object that may
261  /// have been produced and autoreleased as part of a function return
262  /// sequence.
263  CK_ARCReclaimReturnedObject,
264
265  /// \brief [ARC] Causes a value of block type to be copied to the
266  /// heap, if it is not already there.  A number of other operations
267  /// in ARC cause blocks to be copied; this is for cases where that
268  /// would not otherwise be guaranteed, such as when casting to a
269  /// non-block pointer type.
270  CK_ARCExtendBlockObject,
271
272  /// \brief Converts from _Atomic(T) to T.
273  CK_AtomicToNonAtomic,
274  /// \brief Converts from T to _Atomic(T).
275  CK_NonAtomicToAtomic
276};
277
278#define CK_Invalid ((CastKind) -1)
279
280enum BinaryOperatorKind {
281  // Operators listed in order of precedence.
282  // Note that additions to this should also update the StmtVisitor class.
283  BO_PtrMemD, BO_PtrMemI,       // [C++ 5.5] Pointer-to-member operators.
284  BO_Mul, BO_Div, BO_Rem,       // [C99 6.5.5] Multiplicative operators.
285  BO_Add, BO_Sub,               // [C99 6.5.6] Additive operators.
286  BO_Shl, BO_Shr,               // [C99 6.5.7] Bitwise shift operators.
287  BO_LT, BO_GT, BO_LE, BO_GE,   // [C99 6.5.8] Relational operators.
288  BO_EQ, BO_NE,                 // [C99 6.5.9] Equality operators.
289  BO_And,                       // [C99 6.5.10] Bitwise AND operator.
290  BO_Xor,                       // [C99 6.5.11] Bitwise XOR operator.
291  BO_Or,                        // [C99 6.5.12] Bitwise OR operator.
292  BO_LAnd,                      // [C99 6.5.13] Logical AND operator.
293  BO_LOr,                       // [C99 6.5.14] Logical OR operator.
294  BO_Assign, BO_MulAssign,      // [C99 6.5.16] Assignment operators.
295  BO_DivAssign, BO_RemAssign,
296  BO_AddAssign, BO_SubAssign,
297  BO_ShlAssign, BO_ShrAssign,
298  BO_AndAssign, BO_XorAssign,
299  BO_OrAssign,
300  BO_Comma                      // [C99 6.5.17] Comma operator.
301};
302
303enum UnaryOperatorKind {
304  // Note that additions to this should also update the StmtVisitor class.
305  UO_PostInc, UO_PostDec, // [C99 6.5.2.4] Postfix increment and decrement
306  UO_PreInc, UO_PreDec,   // [C99 6.5.3.1] Prefix increment and decrement
307  UO_AddrOf, UO_Deref,    // [C99 6.5.3.2] Address and indirection
308  UO_Plus, UO_Minus,      // [C99 6.5.3.3] Unary arithmetic
309  UO_Not, UO_LNot,        // [C99 6.5.3.3] Unary arithmetic
310  UO_Real, UO_Imag,       // "__real expr"/"__imag expr" Extension.
311  UO_Extension            // __extension__ marker.
312};
313
314/// \brief The kind of bridging performed by the Objective-C bridge cast.
315enum ObjCBridgeCastKind {
316  /// \brief Bridging via __bridge, which does nothing but reinterpret
317  /// the bits.
318  OBC_Bridge,
319  /// \brief Bridging via __bridge_transfer, which transfers ownership of an
320  /// Objective-C pointer into ARC.
321  OBC_BridgeTransfer,
322  /// \brief Bridging via __bridge_retain, which makes an ARC object available
323  /// as a +1 C pointer.
324  OBC_BridgeRetained
325};
326
327}
328
329#endif
330