Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree.def @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
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rev | line source |
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0 | 1 /* This file contains the definitions and documentation for the |
2 tree codes used in GCC. | |
131 | 3 Copyright (C) 1987-2018 Free Software Foundation, Inc. |
0 | 4 |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify it under | |
8 the terms of the GNU General Public License as published by the Free | |
9 Software Foundation; either version 3, or (at your option) any later | |
10 version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 | |
22 /* For tcc_references, tcc_expression, tcc_comparison, tcc_unary, | |
23 tcc_binary, and tcc_statement nodes, which use struct tree_exp, the | |
24 4th element is the number of argument slots to allocate. This | |
25 determines the size of the tree node object. Other nodes use | |
26 different structures, and the size is determined by the tree_union | |
27 member structure; the 4th element should be zero. Languages that | |
28 define language-specific tcc_exceptional or tcc_constant codes must | |
29 define the tree_size langhook to say how big they are. | |
30 | |
31 These tree codes have been sorted so that the macros in tree.h that | |
32 check for various tree codes are optimized into range checks. This | |
33 gives a measurable performance improvement. When adding a new | |
131 | 34 code, consider its placement in relation to the other codes. */ |
0 | 35 |
36 /* Any erroneous construct is parsed into a node of this type. | |
37 This type of node is accepted without complaint in all contexts | |
38 by later parsing activities, to avoid multiple error messages | |
39 for one error. | |
40 No fields in these nodes are used except the TREE_CODE. */ | |
41 DEFTREECODE (ERROR_MARK, "error_mark", tcc_exceptional, 0) | |
42 | |
43 /* Used to represent a name (such as, in the DECL_NAME of a decl node). | |
44 Internally it looks like a STRING_CST node. | |
45 There is only one IDENTIFIER_NODE ever made for any particular name. | |
46 Use `get_identifier' to get it (or create it, the first time). */ | |
47 DEFTREECODE (IDENTIFIER_NODE, "identifier_node", tcc_exceptional, 0) | |
48 | |
49 /* Has the TREE_VALUE and TREE_PURPOSE fields. */ | |
50 /* These nodes are made into lists by chaining through the | |
51 TREE_CHAIN field. The elements of the list live in the | |
52 TREE_VALUE fields, while TREE_PURPOSE fields are occasionally | |
53 used as well to get the effect of Lisp association lists. */ | |
54 DEFTREECODE (TREE_LIST, "tree_list", tcc_exceptional, 0) | |
55 | |
56 /* These nodes contain an array of tree nodes. */ | |
57 DEFTREECODE (TREE_VEC, "tree_vec", tcc_exceptional, 0) | |
58 | |
59 /* A symbol binding block. These are arranged in a tree, | |
60 where the BLOCK_SUBBLOCKS field contains a chain of subblocks | |
61 chained through the BLOCK_CHAIN field. | |
62 BLOCK_SUPERCONTEXT points to the parent block. | |
63 For a block which represents the outermost scope of a function, it | |
64 points to the FUNCTION_DECL node. | |
65 BLOCK_VARS points to a chain of decl nodes. | |
66 BLOCK_CHAIN points to the next BLOCK at the same level. | |
67 BLOCK_ABSTRACT_ORIGIN points to the original (abstract) tree node which | |
68 this block is an instance of, or else is NULL to indicate that this | |
69 block is not an instance of anything else. When non-NULL, the value | |
70 could either point to another BLOCK node or it could point to a | |
71 FUNCTION_DECL node (e.g. in the case of a block representing the | |
72 outermost scope of a particular inlining of a function). | |
73 TREE_ASM_WRITTEN is nonzero if the block was actually referenced | |
74 in the generated assembly. */ | |
75 DEFTREECODE (BLOCK, "block", tcc_exceptional, 0) | |
76 | |
77 /* Each data type is represented by a tree node whose code is one of | |
78 the following: */ | |
79 /* Each node that represents a data type has a component TYPE_SIZE | |
80 containing a tree that is an expression for the size in bits. | |
81 The TYPE_MODE contains the machine mode for values of this type. | |
82 The TYPE_POINTER_TO field contains a type for a pointer to this type, | |
83 or zero if no such has been created yet. | |
84 The TYPE_NEXT_VARIANT field is used to chain together types | |
85 that are variants made by type modifiers such as "const" and "volatile". | |
86 The TYPE_MAIN_VARIANT field, in any member of such a chain, | |
87 points to the start of the chain. | |
88 The TYPE_NAME field contains info on the name used in the program | |
89 for this type (for GDB symbol table output). It is either a | |
90 TYPE_DECL node, for types that are typedefs, or an IDENTIFIER_NODE | |
91 in the case of structs, unions or enums that are known with a tag, | |
92 or zero for types that have no special name. | |
93 The TYPE_CONTEXT for any sort of type which could have a name or | |
94 which could have named members (e.g. tagged types in C/C++) will | |
95 point to the node which represents the scope of the given type, or | |
96 will be NULL_TREE if the type has "file scope". For most types, this | |
97 will point to a BLOCK node or a FUNCTION_DECL node, but it could also | |
98 point to a FUNCTION_TYPE node (for types whose scope is limited to the | |
99 formal parameter list of some function type specification) or it | |
100 could point to a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE node | |
101 (for C++ "member" types). | |
102 For non-tagged-types, TYPE_CONTEXT need not be set to anything in | |
103 particular, since any type which is of some type category (e.g. | |
104 an array type or a function type) which cannot either have a name | |
105 itself or have named members doesn't really have a "scope" per se. | |
111 | 106 The TYPE_STUB_DECL field is used as a forward-references to names for |
0 | 107 ENUMERAL_TYPE, RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE nodes; |
108 see below. */ | |
109 | |
110 /* The ordering of the following codes is optimized for the checking | |
111 macros in tree.h. Changing the order will degrade the speed of the | |
112 compiler. OFFSET_TYPE, ENUMERAL_TYPE, BOOLEAN_TYPE, INTEGER_TYPE, | |
113 REAL_TYPE, POINTER_TYPE. */ | |
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114 |
0 | 115 /* An offset is a pointer relative to an object. |
116 The TREE_TYPE field is the type of the object at the offset. | |
117 The TYPE_OFFSET_BASETYPE points to the node for the type of object | |
118 that the offset is relative to. */ | |
119 DEFTREECODE (OFFSET_TYPE, "offset_type", tcc_type, 0) | |
120 | |
121 /* C enums. The type node looks just like an INTEGER_TYPE node. | |
122 The symbols for the values of the enum type are defined by | |
123 CONST_DECL nodes, but the type does not point to them; | |
124 however, the TYPE_VALUES is a list in which each element's TREE_PURPOSE | |
125 is a name and the TREE_VALUE is the value (an INTEGER_CST node). */ | |
126 /* A forward reference `enum foo' when no enum named foo is defined yet | |
127 has zero (a null pointer) in its TYPE_SIZE. The tag name is in | |
128 the TYPE_NAME field. If the type is later defined, the normal | |
129 fields are filled in. | |
130 RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE forward refs are | |
131 treated similarly. */ | |
132 DEFTREECODE (ENUMERAL_TYPE, "enumeral_type", tcc_type, 0) | |
133 | |
134 /* Boolean type (true or false are the only values). Looks like an | |
135 INTEGRAL_TYPE. */ | |
136 DEFTREECODE (BOOLEAN_TYPE, "boolean_type", tcc_type, 0) | |
137 | |
138 /* Integer types in all languages, including char in C. | |
139 Also used for sub-ranges of other discrete types. | |
140 Has components TYPE_MIN_VALUE, TYPE_MAX_VALUE (expressions, inclusive) | |
131 | 141 and TYPE_PRECISION (number of bits used by this type). */ |
0 | 142 DEFTREECODE (INTEGER_TYPE, "integer_type", tcc_type, 0) |
143 | |
144 /* C's float and double. Different floating types are distinguished | |
145 by machine mode and by the TYPE_SIZE and the TYPE_PRECISION. */ | |
146 DEFTREECODE (REAL_TYPE, "real_type", tcc_type, 0) | |
147 | |
148 /* The ordering of the following codes is optimized for the checking | |
149 macros in tree.h. Changing the order will degrade the speed of the | |
150 compiler. POINTER_TYPE, REFERENCE_TYPE. Note that this range | |
151 overlaps the previous range of ordered types. */ | |
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152 |
0 | 153 /* All pointer-to-x types have code POINTER_TYPE. |
154 The TREE_TYPE points to the node for the type pointed to. */ | |
155 DEFTREECODE (POINTER_TYPE, "pointer_type", tcc_type, 0) | |
156 | |
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157 /* A reference is like a pointer except that it is coerced |
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158 automatically to the value it points to. Used in C++. */ |
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159 DEFTREECODE (REFERENCE_TYPE, "reference_type", tcc_type, 0) |
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160 |
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161 /* The C++ decltype(nullptr) type. */ |
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162 DEFTREECODE (NULLPTR_TYPE, "nullptr_type", tcc_type, 0) |
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163 |
0 | 164 /* _Fract and _Accum types in Embedded-C. Different fixed-point types |
165 are distinguished by machine mode and by the TYPE_SIZE and the | |
166 TYPE_PRECISION. */ | |
167 DEFTREECODE (FIXED_POINT_TYPE, "fixed_point_type", tcc_type, 0) | |
168 | |
169 /* The ordering of the following codes is optimized for the checking | |
170 macros in tree.h. Changing the order will degrade the speed of the | |
171 compiler. COMPLEX_TYPE, VECTOR_TYPE, ARRAY_TYPE. */ | |
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172 |
0 | 173 /* Complex number types. The TREE_TYPE field is the data type |
174 of the real and imaginary parts. It must be of scalar | |
175 arithmetic type, not including pointer type. */ | |
176 DEFTREECODE (COMPLEX_TYPE, "complex_type", tcc_type, 0) | |
177 | |
178 /* Vector types. The TREE_TYPE field is the data type of the vector | |
179 elements. The TYPE_PRECISION field is the number of subparts of | |
180 the vector. */ | |
181 DEFTREECODE (VECTOR_TYPE, "vector_type", tcc_type, 0) | |
182 | |
183 /* The ordering of the following codes is optimized for the checking | |
184 macros in tree.h. Changing the order will degrade the speed of the | |
185 compiler. ARRAY_TYPE, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE. | |
186 Note that this range overlaps the previous range. */ | |
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187 |
0 | 188 /* Types of arrays. Special fields: |
189 TREE_TYPE Type of an array element. | |
190 TYPE_DOMAIN Type to index by. | |
191 Its range of values specifies the array length. | |
192 The field TYPE_POINTER_TO (TREE_TYPE (array_type)) is always nonzero | |
193 and holds the type to coerce a value of that array type to in C. | |
194 TYPE_STRING_FLAG indicates a string (in contrast to an array of chars) | |
195 in languages (such as Chill) that make a distinction. */ | |
131 | 196 /* Array types in C */ |
0 | 197 DEFTREECODE (ARRAY_TYPE, "array_type", tcc_type, 0) |
198 | |
131 | 199 /* Struct in C. */ |
0 | 200 /* Special fields: |
201 TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct, | |
111 | 202 VAR_DECLs, TYPE_DECLs and CONST_DECLs for record-scope variables, |
203 types and enumerators and FUNCTION_DECLs for methods associated | |
131 | 204 with the type. */ |
0 | 205 /* See the comment above, before ENUMERAL_TYPE, for how |
206 forward references to struct tags are handled in C. */ | |
207 DEFTREECODE (RECORD_TYPE, "record_type", tcc_type, 0) | |
208 | |
209 /* Union in C. Like a struct, except that the offsets of the fields | |
210 will all be zero. */ | |
211 /* See the comment above, before ENUMERAL_TYPE, for how | |
212 forward references to union tags are handled in C. */ | |
213 DEFTREECODE (UNION_TYPE, "union_type", tcc_type, 0) /* C union type */ | |
214 | |
215 /* Similar to UNION_TYPE, except that the expressions in DECL_QUALIFIER | |
216 in each FIELD_DECL determine what the union contains. The first | |
217 field whose DECL_QUALIFIER expression is true is deemed to occupy | |
218 the union. */ | |
219 DEFTREECODE (QUAL_UNION_TYPE, "qual_union_type", tcc_type, 0) | |
220 | |
221 /* The ordering of the following codes is optimized for the checking | |
222 macros in tree.h. Changing the order will degrade the speed of the | |
223 compiler. VOID_TYPE, FUNCTION_TYPE, METHOD_TYPE. */ | |
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224 |
0 | 225 /* The void type in C */ |
226 DEFTREECODE (VOID_TYPE, "void_type", tcc_type, 0) | |
227 | |
228 /* Type of functions. Special fields: | |
229 TREE_TYPE type of value returned. | |
230 TYPE_ARG_TYPES list of types of arguments expected. | |
231 this list is made of TREE_LIST nodes. | |
111 | 232 In this list TREE_PURPOSE can be used to indicate the default |
233 value of parameter (used by C++ frontend). | |
0 | 234 Types of "Procedures" in languages where they are different from functions |
235 have code FUNCTION_TYPE also, but then TREE_TYPE is zero or void type. */ | |
236 DEFTREECODE (FUNCTION_TYPE, "function_type", tcc_type, 0) | |
237 | |
238 /* METHOD_TYPE is the type of a function which takes an extra first | |
239 argument for "self", which is not present in the declared argument list. | |
240 The TREE_TYPE is the return type of the method. The TYPE_METHOD_BASETYPE | |
241 is the type of "self". TYPE_ARG_TYPES is the real argument list, which | |
242 includes the hidden argument for "self". */ | |
243 DEFTREECODE (METHOD_TYPE, "method_type", tcc_type, 0) | |
244 | |
245 /* This is a language-specific kind of type. | |
246 Its meaning is defined by the language front end. | |
247 layout_type does not know how to lay this out, | |
248 so the front-end must do so manually. */ | |
249 DEFTREECODE (LANG_TYPE, "lang_type", tcc_type, 0) | |
250 | |
251 /* Expressions */ | |
252 | |
253 /* First, the constants. */ | |
254 | |
111 | 255 DEFTREECODE (VOID_CST, "void_cst", tcc_constant, 0) |
256 | |
257 /* Contents are in an array of HOST_WIDE_INTs. | |
258 | |
259 We often access these constants both in their native precision and | |
260 in wider precisions (with the constant being implicitly extended | |
261 according to TYPE_SIGN). In each case, the useful part of the array | |
262 may be as wide as the precision requires but may be shorter when all | |
263 of the upper bits are sign bits. The length of the array when accessed | |
264 in the constant's native precision is given by TREE_INT_CST_NUNITS. | |
265 The length of the array when accessed in wider precisions is given | |
266 by TREE_INT_CST_EXT_NUNITS. Each element can be obtained using | |
267 TREE_INT_CST_ELT. | |
268 | |
269 INTEGER_CST nodes can be shared, and therefore should be considered | |
270 read only. They should be copied before setting a flag such as | |
271 TREE_OVERFLOW. If an INTEGER_CST has TREE_OVERFLOW already set, | |
272 it is known to be unique. INTEGER_CST nodes are created for the | |
273 integral types, for pointer types and for vector and float types in | |
274 some circumstances. */ | |
0 | 275 DEFTREECODE (INTEGER_CST, "integer_cst", tcc_constant, 0) |
276 | |
131 | 277 /* Contents are given by POLY_INT_CST_COEFF. */ |
278 DEFTREECODE (POLY_INT_CST, "poly_int_cst", tcc_constant, 0) | |
279 | |
0 | 280 /* Contents are in TREE_REAL_CST field. */ |
281 DEFTREECODE (REAL_CST, "real_cst", tcc_constant, 0) | |
282 | |
283 /* Contents are in TREE_FIXED_CST field. */ | |
284 DEFTREECODE (FIXED_CST, "fixed_cst", tcc_constant, 0) | |
285 | |
286 /* Contents are in TREE_REALPART and TREE_IMAGPART fields, | |
287 whose contents are other constant nodes. */ | |
288 DEFTREECODE (COMPLEX_CST, "complex_cst", tcc_constant, 0) | |
289 | |
131 | 290 /* See generic.texi for details. */ |
0 | 291 DEFTREECODE (VECTOR_CST, "vector_cst", tcc_constant, 0) |
292 | |
293 /* Contents are TREE_STRING_LENGTH and the actual contents of the string. */ | |
294 DEFTREECODE (STRING_CST, "string_cst", tcc_constant, 0) | |
295 | |
296 /* Declarations. All references to names are represented as ..._DECL | |
297 nodes. The decls in one binding context are chained through the | |
298 TREE_CHAIN field. Each DECL has a DECL_NAME field which contains | |
299 an IDENTIFIER_NODE. (Some decls, most often labels, may have zero | |
300 as the DECL_NAME). DECL_CONTEXT points to the node representing | |
301 the context in which this declaration has its scope. For | |
302 FIELD_DECLs, this is the RECORD_TYPE, UNION_TYPE, or | |
303 QUAL_UNION_TYPE node that the field is a member of. For VAR_DECL, | |
304 PARM_DECL, FUNCTION_DECL, LABEL_DECL, and CONST_DECL nodes, this | |
305 points to either the FUNCTION_DECL for the containing function, the | |
306 RECORD_TYPE or UNION_TYPE for the containing type, or NULL_TREE or | |
307 a TRANSLATION_UNIT_DECL if the given decl has "file scope". | |
308 DECL_ABSTRACT_ORIGIN, if non-NULL, points to the original (abstract) | |
309 ..._DECL node of which this decl is an (inlined or template expanded) | |
310 instance. | |
311 The TREE_TYPE field holds the data type of the object, when relevant. | |
312 LABEL_DECLs have no data type. For TYPE_DECL, the TREE_TYPE field | |
313 contents are the type whose name is being declared. | |
314 The DECL_ALIGN, DECL_SIZE, | |
315 and DECL_MODE fields exist in decl nodes just as in type nodes. | |
316 They are unused in LABEL_DECL, TYPE_DECL and CONST_DECL nodes. | |
317 | |
318 DECL_FIELD_BIT_OFFSET holds an integer number of bits offset for | |
319 the location. DECL_VOFFSET holds an expression for a variable | |
320 offset; it is to be multiplied by DECL_VOFFSET_UNIT (an integer). | |
321 These fields are relevant only in FIELD_DECLs and PARM_DECLs. | |
322 | |
323 DECL_INITIAL holds the value to initialize a variable to, | |
324 or the value of a constant. For a function, it holds the body | |
325 (a node of type BLOCK representing the function's binding contour | |
326 and whose body contains the function's statements.) For a LABEL_DECL | |
327 in C, it is a flag, nonzero if the label's definition has been seen. | |
328 | |
329 PARM_DECLs use a special field: | |
330 DECL_ARG_TYPE is the type in which the argument is actually | |
331 passed, which may be different from its type within the function. | |
332 | |
333 FUNCTION_DECLs use four special fields: | |
334 DECL_ARGUMENTS holds a chain of PARM_DECL nodes for the arguments. | |
335 DECL_RESULT holds a RESULT_DECL node for the value of a function. | |
336 The DECL_RTL field is 0 for a function that returns no value. | |
337 (C functions returning void have zero here.) | |
338 The TREE_TYPE field is the type in which the result is actually | |
339 returned. This is usually the same as the return type of the | |
340 FUNCTION_DECL, but it may be a wider integer type because of | |
341 promotion. | |
342 DECL_FUNCTION_CODE is a code number that is nonzero for | |
343 built-in functions. Its value is an enum built_in_function | |
344 that says which built-in function it is. | |
345 | |
346 DECL_SOURCE_FILE holds a filename string and DECL_SOURCE_LINE | |
347 holds a line number. In some cases these can be the location of | |
348 a reference, if no definition has been seen. | |
349 | |
350 DECL_ABSTRACT is nonzero if the decl represents an abstract instance | |
351 of a decl (i.e. one which is nested within an abstract instance of a | |
352 inline function. */ | |
353 | |
354 DEFTREECODE (FUNCTION_DECL, "function_decl", tcc_declaration, 0) | |
355 DEFTREECODE (LABEL_DECL, "label_decl", tcc_declaration, 0) | |
356 /* The ordering of the following codes is optimized for the checking | |
357 macros in tree.h. Changing the order will degrade the speed of the | |
358 compiler. FIELD_DECL, VAR_DECL, CONST_DECL, PARM_DECL, | |
359 TYPE_DECL. */ | |
360 DEFTREECODE (FIELD_DECL, "field_decl", tcc_declaration, 0) | |
361 DEFTREECODE (VAR_DECL, "var_decl", tcc_declaration, 0) | |
362 DEFTREECODE (CONST_DECL, "const_decl", tcc_declaration, 0) | |
363 DEFTREECODE (PARM_DECL, "parm_decl", tcc_declaration, 0) | |
364 DEFTREECODE (TYPE_DECL, "type_decl", tcc_declaration, 0) | |
365 DEFTREECODE (RESULT_DECL, "result_decl", tcc_declaration, 0) | |
366 | |
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367 /* A "declaration" of a debug temporary. It should only appear in |
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368 DEBUG stmts. */ |
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369 DEFTREECODE (DEBUG_EXPR_DECL, "debug_expr_decl", tcc_declaration, 0) |
0 | 370 |
131 | 371 /* A stmt that marks the beginning of a source statement. */ |
372 DEFTREECODE (DEBUG_BEGIN_STMT, "debug_begin_stmt", tcc_statement, 0) | |
373 | |
0 | 374 /* A namespace declaration. Namespaces appear in DECL_CONTEXT of other |
375 _DECLs, providing a hierarchy of names. */ | |
376 DEFTREECODE (NAMESPACE_DECL, "namespace_decl", tcc_declaration, 0) | |
377 | |
378 /* A declaration import. | |
379 The C++ FE uses this to represent a using-directive; eg: | |
380 "using namespace foo". | |
381 But it could be used to represent any declaration import construct. | |
382 Whenever a declaration import appears in a lexical block, the BLOCK node | |
383 representing that lexical block in GIMPLE will contain an IMPORTED_DECL | |
384 node, linked via BLOCK_VARS accessor of the said BLOCK. | |
385 For a given NODE which code is IMPORTED_DECL, | |
386 IMPORTED_DECL_ASSOCIATED_DECL (NODE) accesses the imported declaration. */ | |
387 DEFTREECODE (IMPORTED_DECL, "imported_decl", tcc_declaration, 0) | |
388 | |
111 | 389 /* A namelist declaration. |
390 The Fortran FE uses this to represent a namelist statement, e.g.: | |
391 NAMELIST /namelist-group-name/ namelist-group-object-list. | |
392 Whenever a declaration import appears in a lexical block, the BLOCK node | |
393 representing that lexical block in GIMPLE will contain an NAMELIST_DECL | |
394 node, linked via BLOCK_VARS accessor of the said BLOCK. | |
395 For a given NODE which code is NAMELIST_DECL, | |
396 NAMELIST_DECL_ASSOCIATED_DECL (NODE) accesses the imported declaration. */ | |
397 DEFTREECODE (NAMELIST_DECL, "namelist_decl", tcc_declaration, 0) | |
398 | |
0 | 399 /* A translation unit. This is not technically a declaration, since it |
400 can't be looked up, but it's close enough. */ | |
401 DEFTREECODE (TRANSLATION_UNIT_DECL, "translation_unit_decl",\ | |
402 tcc_declaration, 0) | |
403 | |
404 /* References to storage. */ | |
405 | |
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406 /* The ordering of the following codes is optimized for the classification |
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407 in handled_component_p. Keep them in a consecutive group. */ |
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408 |
0 | 409 /* Value is structure or union component. |
410 Operand 0 is the structure or union (an expression). | |
411 Operand 1 is the field (a node of type FIELD_DECL). | |
412 Operand 2, if present, is the value of DECL_FIELD_OFFSET, measured | |
413 in units of DECL_OFFSET_ALIGN / BITS_PER_UNIT. */ | |
414 DEFTREECODE (COMPONENT_REF, "component_ref", tcc_reference, 3) | |
415 | |
416 /* Reference to a group of bits within an object. Similar to COMPONENT_REF | |
417 except the position is given explicitly rather than via a FIELD_DECL. | |
418 Operand 0 is the structure or union expression; | |
419 operand 1 is a tree giving the constant number of bits being referenced; | |
420 operand 2 is a tree giving the constant position of the first referenced bit. | |
421 The result type width has to match the number of bits referenced. | |
422 If the result type is integral, its signedness specifies how it is extended | |
423 to its mode width. */ | |
424 DEFTREECODE (BIT_FIELD_REF, "bit_field_ref", tcc_reference, 3) | |
425 | |
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426 /* Array indexing. |
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427 Operand 0 is the array; operand 1 is a (single) array index. |
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428 Operand 2, if present, is a copy of TYPE_MIN_VALUE of the index. |
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429 Operand 3, if present, is the element size, measured in units of |
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430 the alignment of the element type. */ |
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431 DEFTREECODE (ARRAY_REF, "array_ref", tcc_reference, 4) |
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432 |
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433 /* Likewise, except that the result is a range ("slice") of the array. The |
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434 starting index of the resulting array is taken from operand 1 and the size |
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435 of the range is taken from the type of the expression. */ |
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436 DEFTREECODE (ARRAY_RANGE_REF, "array_range_ref", tcc_reference, 4) |
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437 |
111 | 438 /* Used only on an operand of complex type, these return |
439 a value of the corresponding component type. */ | |
440 DEFTREECODE (REALPART_EXPR, "realpart_expr", tcc_reference, 1) | |
441 DEFTREECODE (IMAGPART_EXPR, "imagpart_expr", tcc_reference, 1) | |
442 | |
443 /* Represents viewing something of one type as being of a second type. | |
444 This corresponds to an "Unchecked Conversion" in Ada and roughly to | |
445 the idiom *(type2 *)&X in C. The only operand is the value to be | |
446 viewed as being of another type. It is undefined if the type of the | |
447 input and of the expression have different sizes. | |
448 | |
449 This code may also be used within the LHS of a MODIFY_EXPR, in which | |
450 case no actual data motion may occur. TREE_ADDRESSABLE will be set in | |
451 this case and GCC must abort if it could not do the operation without | |
452 generating insns. */ | |
453 DEFTREECODE (VIEW_CONVERT_EXPR, "view_convert_expr", tcc_reference, 1) | |
454 | |
131 | 455 /* C unary `*'. One operand, an expression for a pointer. */ |
0 | 456 DEFTREECODE (INDIRECT_REF, "indirect_ref", tcc_reference, 1) |
457 | |
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458 /* Used to represent lookup in a virtual method table which is dependent on |
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459 the runtime type of an object. Operands are: |
0 | 460 OBJ_TYPE_REF_EXPR: An expression that evaluates the value to use. |
461 OBJ_TYPE_REF_OBJECT: Is the object on whose behalf the lookup is | |
462 being performed. Through this the optimizers may be able to statically | |
463 determine the dynamic type of the object. | |
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464 OBJ_TYPE_REF_TOKEN: An integer index to the virtual method table. */ |
0 | 465 DEFTREECODE (OBJ_TYPE_REF, "obj_type_ref", tcc_expression, 3) |
466 | |
111 | 467 /* Used to represent the brace-enclosed initializers for a structure or an |
468 array. It contains a sequence of component values made out of a VEC of | |
469 constructor_elt. | |
470 | |
471 For RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE: | |
472 The field INDEX of each constructor_elt is a FIELD_DECL. | |
0 | 473 |
474 For ARRAY_TYPE: | |
475 The field INDEX of each constructor_elt is the corresponding index. | |
476 If the index is a RANGE_EXPR, it is a short-hand for many nodes, | |
477 one for each index in the range. (If the corresponding field VALUE | |
478 has side-effects, they are evaluated once for each element. Wrap the | |
479 value in a SAVE_EXPR if you want to evaluate side effects only once.) | |
480 | |
111 | 481 Components that aren't present are cleared as per the C semantics, |
482 unless the CONSTRUCTOR_NO_CLEARING flag is set, in which case their | |
483 value becomes undefined. */ | |
0 | 484 DEFTREECODE (CONSTRUCTOR, "constructor", tcc_exceptional, 0) |
485 | |
486 /* The expression types are mostly straightforward, with the fourth argument | |
487 of DEFTREECODE saying how many operands there are. | |
488 Unless otherwise specified, the operands are expressions and the | |
489 types of all the operands and the expression must all be the same. */ | |
490 | |
491 /* Contains two expressions to compute, one followed by the other. | |
492 the first value is ignored. The second one's value is used. The | |
493 type of the first expression need not agree with the other types. */ | |
494 DEFTREECODE (COMPOUND_EXPR, "compound_expr", tcc_expression, 2) | |
495 | |
496 /* Assignment expression. Operand 0 is the what to set; 1, the new value. */ | |
497 DEFTREECODE (MODIFY_EXPR, "modify_expr", tcc_expression, 2) | |
498 | |
499 /* Initialization expression. Operand 0 is the variable to initialize; | |
500 Operand 1 is the initializer. This differs from MODIFY_EXPR in that any | |
501 reference to the referent of operand 0 within operand 1 is undefined. */ | |
502 DEFTREECODE (INIT_EXPR, "init_expr", tcc_expression, 2) | |
503 | |
504 /* For TARGET_EXPR, operand 0 is the target of an initialization, | |
505 operand 1 is the initializer for the target, which may be void | |
506 if simply expanding it initializes the target. | |
507 operand 2 is the cleanup for this node, if any. | |
508 operand 3 is the saved initializer after this node has been | |
509 expanded once; this is so we can re-expand the tree later. */ | |
510 DEFTREECODE (TARGET_EXPR, "target_expr", tcc_expression, 4) | |
511 | |
512 /* Conditional expression ( ... ? ... : ... in C). | |
513 Operand 0 is the condition. | |
514 Operand 1 is the then-value. | |
515 Operand 2 is the else-value. | |
516 Operand 0 may be of any type. | |
517 Operand 1 must have the same type as the entire expression, unless | |
518 it unconditionally throws an exception, in which case it should | |
519 have VOID_TYPE. The same constraints apply to operand 2. The | |
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520 condition in operand 0 must be of integral type. |
0 | 521 |
522 In cfg gimple, if you do not have a selection expression, operands | |
523 1 and 2 are NULL. The operands are then taken from the cfg edges. */ | |
524 DEFTREECODE (COND_EXPR, "cond_expr", tcc_expression, 3) | |
525 | |
131 | 526 /* Represents a vector in which every element is equal to operand 0. */ |
527 DEFTREECODE (VEC_DUPLICATE_EXPR, "vec_duplicate_expr", tcc_unary, 1) | |
528 | |
529 /* Vector series created from a start (base) value and a step. | |
530 | |
531 A = VEC_SERIES_EXPR (B, C) | |
532 | |
533 means | |
534 | |
535 for (i = 0; i < N; i++) | |
536 A[i] = B + C * i; */ | |
537 DEFTREECODE (VEC_SERIES_EXPR, "vec_series_expr", tcc_binary, 2) | |
538 | |
0 | 539 /* Vector conditional expression. It is like COND_EXPR, but with |
540 vector operands. | |
541 | |
542 A = VEC_COND_EXPR ( X < Y, B, C) | |
543 | |
544 means | |
545 | |
546 for (i=0; i<N; i++) | |
547 A[i] = X[i] < Y[i] ? B[i] : C[i]; | |
548 */ | |
549 DEFTREECODE (VEC_COND_EXPR, "vec_cond_expr", tcc_expression, 3) | |
550 | |
111 | 551 /* Vector permutation expression. A = VEC_PERM_EXPR<v0, v1, mask> means |
552 | |
553 N = length(mask) | |
554 foreach i in N: | |
555 M = mask[i] % (2*N) | |
556 A = M < N ? v0[M] : v1[M-N] | |
557 | |
558 V0 and V1 are vectors of the same type. MASK is an integer-typed | |
559 vector. The number of MASK elements must be the same with the | |
560 number of elements in V0 and V1. The size of the inner type | |
561 of the MASK and of the V0 and V1 must be the same. | |
562 */ | |
563 DEFTREECODE (VEC_PERM_EXPR, "vec_perm_expr", tcc_expression, 3) | |
564 | |
0 | 565 /* Declare local variables, including making RTL and allocating space. |
566 BIND_EXPR_VARS is a chain of VAR_DECL nodes for the variables. | |
567 BIND_EXPR_BODY is the body, the expression to be computed using | |
568 the variables. The value of operand 1 becomes that of the BIND_EXPR. | |
569 BIND_EXPR_BLOCK is the BLOCK that corresponds to these bindings | |
570 for debugging purposes. If this BIND_EXPR is actually expanded, | |
571 that sets the TREE_USED flag in the BLOCK. | |
572 | |
573 The BIND_EXPR is not responsible for informing parsers | |
574 about these variables. If the body is coming from the input file, | |
575 then the code that creates the BIND_EXPR is also responsible for | |
576 informing the parser of the variables. | |
577 | |
578 If the BIND_EXPR is ever expanded, its TREE_USED flag is set. | |
579 This tells the code for debugging symbol tables not to ignore the BIND_EXPR. | |
580 If the BIND_EXPR should be output for debugging but will not be expanded, | |
581 set the TREE_USED flag by hand. | |
582 | |
583 In order for the BIND_EXPR to be known at all, the code that creates it | |
584 must also install it as a subblock in the tree of BLOCK | |
585 nodes for the function. */ | |
586 DEFTREECODE (BIND_EXPR, "bind_expr", tcc_expression, 3) | |
587 | |
588 /* Function call. CALL_EXPRs are represented by variably-sized expression | |
589 nodes. There are at least three fixed operands. Operand 0 is an | |
590 INTEGER_CST node containing the total operand count, the number of | |
111 | 591 arguments plus 3. Operand 1 is the function or NULL, while operand 2 is |
0 | 592 is static chain argument, or NULL. The remaining operands are the |
593 arguments to the call. */ | |
594 DEFTREECODE (CALL_EXPR, "call_expr", tcc_vl_exp, 3) | |
595 | |
596 /* Specify a value to compute along with its corresponding cleanup. | |
597 Operand 0 is the cleanup expression. | |
598 The cleanup is executed by the first enclosing CLEANUP_POINT_EXPR, | |
599 which must exist. This differs from TRY_CATCH_EXPR in that operand 1 | |
600 is always evaluated when cleanups are run. */ | |
601 DEFTREECODE (WITH_CLEANUP_EXPR, "with_cleanup_expr", tcc_expression, 1) | |
602 | |
603 /* Specify a cleanup point. | |
604 Operand 0 is an expression that may have cleanups. If it does, those | |
605 cleanups are executed after the expression is expanded. | |
606 | |
607 Note that if the expression is a reference to storage, it is forced out | |
608 of memory before the cleanups are run. This is necessary to handle | |
609 cases where the cleanups modify the storage referenced; in the | |
610 expression 't.i', if 't' is a struct with an integer member 'i' and a | |
611 cleanup which modifies 'i', the value of the expression depends on | |
612 whether the cleanup is run before or after 't.i' is evaluated. When | |
613 expand_expr is run on 't.i', it returns a MEM. This is not good enough; | |
614 the value of 't.i' must be forced out of memory. | |
615 | |
616 As a consequence, the operand of a CLEANUP_POINT_EXPR must not have | |
617 BLKmode, because it will not be forced out of memory. */ | |
618 DEFTREECODE (CLEANUP_POINT_EXPR, "cleanup_point_expr", tcc_expression, 1) | |
619 | |
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620 /* The following code is used in languages that have types where some |
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621 field in an object of the type contains a value that is used in the |
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622 computation of another field's offset or size and/or the size of the |
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623 type. The positions and/or sizes of fields can vary from object to |
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624 object of the same type or even for one and the same object within |
0 | 625 its scope. |
626 | |
131 | 627 Record types with discriminants in Ada are |
0 | 628 examples of such types. This mechanism is also used to create "fat |
629 pointers" for unconstrained array types in Ada; the fat pointer is a | |
630 structure one of whose fields is a pointer to the actual array type | |
631 and the other field is a pointer to a template, which is a structure | |
632 containing the bounds of the array. The bounds in the type pointed | |
633 to by the first field in the fat pointer refer to the values in the | |
634 template. | |
635 | |
636 When you wish to construct such a type you need "self-references" | |
637 that allow you to reference the object having this type from the | |
638 TYPE node, i.e. without having a variable instantiating this type. | |
639 | |
640 Such a "self-references" is done using a PLACEHOLDER_EXPR. This is | |
641 a node that will later be replaced with the object being referenced. | |
642 Its type is that of the object and selects which object to use from | |
643 a chain of references (see below). No other slots are used in the | |
644 PLACEHOLDER_EXPR. | |
645 | |
646 For example, if your type FOO is a RECORD_TYPE with a field BAR, | |
647 and you need the value of <variable>.BAR to calculate TYPE_SIZE | |
648 (FOO), just substitute <variable> above with a PLACEHOLDER_EXPR | |
649 whose TREE_TYPE is FOO. Then construct your COMPONENT_REF with | |
650 the PLACEHOLDER_EXPR as the first operand (which has the correct | |
651 type). Later, when the size is needed in the program, the back-end | |
652 will find this PLACEHOLDER_EXPR and generate code to calculate the | |
653 actual size at run-time. In the following, we describe how this | |
654 calculation is done. | |
655 | |
656 When we wish to evaluate a size or offset, we check whether it contains a | |
657 PLACEHOLDER_EXPR. If it does, we call substitute_placeholder_in_expr | |
658 passing both that tree and an expression within which the object may be | |
659 found. The latter expression is the object itself in the simple case of | |
660 an Ada record with discriminant, but it can be the array in the case of an | |
661 unconstrained array. | |
662 | |
663 In the latter case, we need the fat pointer, because the bounds of | |
664 the array can only be accessed from it. However, we rely here on the | |
665 fact that the expression for the array contains the dereference of | |
666 the fat pointer that obtained the array pointer. */ | |
667 | |
668 /* Denotes a record to later be substituted before evaluating this expression. | |
669 The type of this expression is used to find the record to replace it. */ | |
670 DEFTREECODE (PLACEHOLDER_EXPR, "placeholder_expr", tcc_exceptional, 0) | |
671 | |
672 /* Simple arithmetic. */ | |
673 DEFTREECODE (PLUS_EXPR, "plus_expr", tcc_binary, 2) | |
674 DEFTREECODE (MINUS_EXPR, "minus_expr", tcc_binary, 2) | |
675 DEFTREECODE (MULT_EXPR, "mult_expr", tcc_binary, 2) | |
676 | |
677 /* Pointer addition. The first operand is always a pointer and the | |
678 second operand is an integer of type sizetype. */ | |
679 DEFTREECODE (POINTER_PLUS_EXPR, "pointer_plus_expr", tcc_binary, 2) | |
680 | |
131 | 681 /* Pointer subtraction. The two arguments are pointers, and the result |
682 is a signed integer of the same precision. Pointers are interpreted | |
683 as unsigned, the difference is computed as if in infinite signed | |
684 precision. Behavior is undefined if the difference does not fit in | |
685 the result type. The result does not depend on the pointer type, | |
686 it is not divided by the size of the pointed-to type. */ | |
687 DEFTREECODE (POINTER_DIFF_EXPR, "pointer_diff_expr", tcc_binary, 2) | |
688 | |
111 | 689 /* Highpart multiplication. For an integral type with precision B, |
690 returns bits [2B-1, B] of the full 2*B product. */ | |
691 DEFTREECODE (MULT_HIGHPART_EXPR, "mult_highpart_expr", tcc_binary, 2) | |
692 | |
0 | 693 /* Division for integer result that rounds the quotient toward zero. */ |
694 DEFTREECODE (TRUNC_DIV_EXPR, "trunc_div_expr", tcc_binary, 2) | |
695 | |
111 | 696 /* Division for integer result that rounds it toward plus infinity. */ |
0 | 697 DEFTREECODE (CEIL_DIV_EXPR, "ceil_div_expr", tcc_binary, 2) |
698 | |
111 | 699 /* Division for integer result that rounds it toward minus infinity. */ |
0 | 700 DEFTREECODE (FLOOR_DIV_EXPR, "floor_div_expr", tcc_binary, 2) |
701 | |
111 | 702 /* Division for integer result that rounds it toward nearest integer. */ |
0 | 703 DEFTREECODE (ROUND_DIV_EXPR, "round_div_expr", tcc_binary, 2) |
704 | |
111 | 705 /* Four kinds of remainder that go with the four kinds of division: */ |
706 | |
707 /* The sign of the remainder is that of the dividend. */ | |
0 | 708 DEFTREECODE (TRUNC_MOD_EXPR, "trunc_mod_expr", tcc_binary, 2) |
111 | 709 |
710 /* The sign of the remainder is the opposite of that of the divisor. */ | |
0 | 711 DEFTREECODE (CEIL_MOD_EXPR, "ceil_mod_expr", tcc_binary, 2) |
111 | 712 |
713 /* The sign of the remainder is that of the divisor. */ | |
0 | 714 DEFTREECODE (FLOOR_MOD_EXPR, "floor_mod_expr", tcc_binary, 2) |
111 | 715 |
716 /* The sign of the remainder is not predictable. */ | |
0 | 717 DEFTREECODE (ROUND_MOD_EXPR, "round_mod_expr", tcc_binary, 2) |
718 | |
719 /* Division for real result. */ | |
720 DEFTREECODE (RDIV_EXPR, "rdiv_expr", tcc_binary, 2) | |
721 | |
722 /* Division which is not supposed to need rounding. | |
723 Used for pointer subtraction in C. */ | |
724 DEFTREECODE (EXACT_DIV_EXPR, "exact_div_expr", tcc_binary, 2) | |
725 | |
726 /* Conversion of real to fixed point by truncation. */ | |
727 DEFTREECODE (FIX_TRUNC_EXPR, "fix_trunc_expr", tcc_unary, 1) | |
728 | |
729 /* Conversion of an integer to a real. */ | |
730 DEFTREECODE (FLOAT_EXPR, "float_expr", tcc_unary, 1) | |
731 | |
732 /* Unary negation. */ | |
733 DEFTREECODE (NEGATE_EXPR, "negate_expr", tcc_unary, 1) | |
734 | |
735 /* Minimum and maximum values. When used with floating point, if both | |
736 operands are zeros, or if either operand is NaN, then it is unspecified | |
737 which of the two operands is returned as the result. */ | |
738 DEFTREECODE (MIN_EXPR, "min_expr", tcc_binary, 2) | |
739 DEFTREECODE (MAX_EXPR, "max_expr", tcc_binary, 2) | |
740 | |
741 /* Represents the absolute value of the operand. | |
742 | |
743 An ABS_EXPR must have either an INTEGER_TYPE or a REAL_TYPE. The | |
744 operand of the ABS_EXPR must have the same type. */ | |
745 DEFTREECODE (ABS_EXPR, "abs_expr", tcc_unary, 1) | |
746 | |
131 | 747 /* Represents the unsigned absolute value of the operand. |
748 An ABSU_EXPR must have unsigned INTEGER_TYPE. The operand of the ABSU_EXPR | |
749 must have the corresponding signed type. */ | |
750 DEFTREECODE (ABSU_EXPR, "absu_expr", tcc_unary, 1) | |
751 | |
0 | 752 /* Shift operations for shift and rotate. |
753 Shift means logical shift if done on an | |
754 unsigned type, arithmetic shift if done on a signed type. | |
755 The second operand is the number of bits to | |
756 shift by; it need not be the same type as the first operand and result. | |
757 Note that the result is undefined if the second operand is larger | |
758 than or equal to the first operand's type size. | |
759 | |
760 The first operand of a shift can have either an integer or a | |
761 (non-integer) fixed-point type. We follow the ISO/IEC TR 18037:2004 | |
762 semantics for the latter. | |
763 | |
764 Rotates are defined for integer types only. */ | |
765 DEFTREECODE (LSHIFT_EXPR, "lshift_expr", tcc_binary, 2) | |
766 DEFTREECODE (RSHIFT_EXPR, "rshift_expr", tcc_binary, 2) | |
767 DEFTREECODE (LROTATE_EXPR, "lrotate_expr", tcc_binary, 2) | |
768 DEFTREECODE (RROTATE_EXPR, "rrotate_expr", tcc_binary, 2) | |
769 | |
770 /* Bitwise operations. Operands have same mode as result. */ | |
771 DEFTREECODE (BIT_IOR_EXPR, "bit_ior_expr", tcc_binary, 2) | |
772 DEFTREECODE (BIT_XOR_EXPR, "bit_xor_expr", tcc_binary, 2) | |
773 DEFTREECODE (BIT_AND_EXPR, "bit_and_expr", tcc_binary, 2) | |
774 DEFTREECODE (BIT_NOT_EXPR, "bit_not_expr", tcc_unary, 1) | |
775 | |
776 /* ANDIF and ORIF allow the second operand not to be computed if the | |
777 value of the expression is determined from the first operand. AND, | |
778 OR, and XOR always compute the second operand whether its value is | |
779 needed or not (for side effects). The operand may have | |
780 BOOLEAN_TYPE or INTEGER_TYPE. In either case, the argument will be | |
781 either zero or one. For example, a TRUTH_NOT_EXPR will never have | |
782 an INTEGER_TYPE VAR_DECL as its argument; instead, a NE_EXPR will be | |
783 used to compare the VAR_DECL to zero, thereby obtaining a node with | |
784 value zero or one. */ | |
785 DEFTREECODE (TRUTH_ANDIF_EXPR, "truth_andif_expr", tcc_expression, 2) | |
786 DEFTREECODE (TRUTH_ORIF_EXPR, "truth_orif_expr", tcc_expression, 2) | |
787 DEFTREECODE (TRUTH_AND_EXPR, "truth_and_expr", tcc_expression, 2) | |
788 DEFTREECODE (TRUTH_OR_EXPR, "truth_or_expr", tcc_expression, 2) | |
789 DEFTREECODE (TRUTH_XOR_EXPR, "truth_xor_expr", tcc_expression, 2) | |
790 DEFTREECODE (TRUTH_NOT_EXPR, "truth_not_expr", tcc_expression, 1) | |
791 | |
792 /* Relational operators. | |
793 `EQ_EXPR' and `NE_EXPR' are allowed for any types. | |
794 The others are allowed only for integer (or pointer or enumeral) | |
795 or real types. | |
796 In all cases the operands will have the same type, | |
111 | 797 and the value is either the type used by the language for booleans |
798 or an integer vector type of the same size and with the same number | |
799 of elements as the comparison operands. True for a vector of | |
800 comparison results has all bits set while false is equal to zero. */ | |
0 | 801 DEFTREECODE (LT_EXPR, "lt_expr", tcc_comparison, 2) |
802 DEFTREECODE (LE_EXPR, "le_expr", tcc_comparison, 2) | |
803 DEFTREECODE (GT_EXPR, "gt_expr", tcc_comparison, 2) | |
804 DEFTREECODE (GE_EXPR, "ge_expr", tcc_comparison, 2) | |
805 DEFTREECODE (EQ_EXPR, "eq_expr", tcc_comparison, 2) | |
806 DEFTREECODE (NE_EXPR, "ne_expr", tcc_comparison, 2) | |
807 | |
808 /* Additional relational operators for floating point unordered. */ | |
809 DEFTREECODE (UNORDERED_EXPR, "unordered_expr", tcc_comparison, 2) | |
810 DEFTREECODE (ORDERED_EXPR, "ordered_expr", tcc_comparison, 2) | |
811 | |
812 /* These are equivalent to unordered or ... */ | |
813 DEFTREECODE (UNLT_EXPR, "unlt_expr", tcc_comparison, 2) | |
814 DEFTREECODE (UNLE_EXPR, "unle_expr", tcc_comparison, 2) | |
815 DEFTREECODE (UNGT_EXPR, "ungt_expr", tcc_comparison, 2) | |
816 DEFTREECODE (UNGE_EXPR, "unge_expr", tcc_comparison, 2) | |
817 DEFTREECODE (UNEQ_EXPR, "uneq_expr", tcc_comparison, 2) | |
818 | |
819 /* This is the reverse of uneq_expr. */ | |
820 DEFTREECODE (LTGT_EXPR, "ltgt_expr", tcc_comparison, 2) | |
821 | |
822 DEFTREECODE (RANGE_EXPR, "range_expr", tcc_binary, 2) | |
823 | |
824 /* Represents a re-association barrier for floating point expressions | |
825 like explicit parenthesis in fortran. */ | |
826 DEFTREECODE (PAREN_EXPR, "paren_expr", tcc_unary, 1) | |
827 | |
828 /* Represents a conversion of type of a value. | |
829 All conversions, including implicit ones, must be | |
830 represented by CONVERT_EXPR or NOP_EXPR nodes. */ | |
831 DEFTREECODE (CONVERT_EXPR, "convert_expr", tcc_unary, 1) | |
832 | |
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833 /* Conversion of a pointer value to a pointer to a different |
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834 address space. */ |
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835 DEFTREECODE (ADDR_SPACE_CONVERT_EXPR, "addr_space_convert_expr", tcc_unary, 1) |
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836 |
0 | 837 /* Conversion of a fixed-point value to an integer, a real, or a fixed-point |
838 value. Or conversion of a fixed-point value from an integer, a real, or | |
839 a fixed-point value. */ | |
840 DEFTREECODE (FIXED_CONVERT_EXPR, "fixed_convert_expr", tcc_unary, 1) | |
841 | |
842 /* Represents a conversion expected to require no code to be generated. */ | |
843 DEFTREECODE (NOP_EXPR, "nop_expr", tcc_unary, 1) | |
844 | |
845 /* Value is same as argument, but guaranteed not an lvalue. */ | |
846 DEFTREECODE (NON_LVALUE_EXPR, "non_lvalue_expr", tcc_unary, 1) | |
847 | |
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848 /* A COMPOUND_LITERAL_EXPR represents a literal that is placed in a DECL. The |
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849 COMPOUND_LITERAL_EXPR_DECL_EXPR is the a DECL_EXPR containing the decl |
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850 for the anonymous object represented by the COMPOUND_LITERAL; |
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851 the DECL_INITIAL of that decl is the CONSTRUCTOR that initializes |
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852 the compound literal. */ |
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853 DEFTREECODE (COMPOUND_LITERAL_EXPR, "compound_literal_expr", tcc_expression, 1) |
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854 |
0 | 855 /* Represents something we computed once and will use multiple times. |
856 First operand is that expression. After it is evaluated once, it | |
857 will be replaced by the temporary variable that holds the value. */ | |
858 DEFTREECODE (SAVE_EXPR, "save_expr", tcc_expression, 1) | |
859 | |
860 /* & in C. Value is the address at which the operand's value resides. | |
861 Operand may have any mode. Result mode is Pmode. */ | |
862 DEFTREECODE (ADDR_EXPR, "addr_expr", tcc_expression, 1) | |
863 | |
864 /* Operand0 is a function constant; result is part N of a function | |
865 descriptor of type ptr_mode. */ | |
866 DEFTREECODE (FDESC_EXPR, "fdesc_expr", tcc_expression, 2) | |
867 | |
111 | 868 /* Given a container value, a replacement value and a bit position within |
869 the container, produce the value that results from replacing the part of | |
870 the container starting at the bit position with the replacement value. | |
871 Operand 0 is a tree for the container value of integral or vector type; | |
872 Operand 1 is a tree for the replacement value of another integral or | |
873 the vector element type; | |
874 Operand 2 is a tree giving the constant bit position; | |
875 The number of bits replaced is given by the precision of the type of the | |
876 replacement value if it is integral or by its size if it is non-integral. | |
877 ??? The reason to make the size of the replacement implicit is to avoid | |
878 introducing a quaternary operation. | |
879 The replaced bits shall be fully inside the container. If the container | |
880 is of vector type, then these bits shall be aligned with its elements. */ | |
881 DEFTREECODE (BIT_INSERT_EXPR, "bit_insert_expr", tcc_expression, 3) | |
882 | |
0 | 883 /* Given two real or integer operands of the same type, |
884 returns a complex value of the corresponding complex type. */ | |
885 DEFTREECODE (COMPLEX_EXPR, "complex_expr", tcc_binary, 2) | |
886 | |
887 /* Complex conjugate of operand. Used only on complex types. */ | |
888 DEFTREECODE (CONJ_EXPR, "conj_expr", tcc_unary, 1) | |
889 | |
890 /* Nodes for ++ and -- in C. | |
891 The second arg is how much to increment or decrement by. | |
892 For a pointer, it would be the size of the object pointed to. */ | |
893 DEFTREECODE (PREDECREMENT_EXPR, "predecrement_expr", tcc_expression, 2) | |
894 DEFTREECODE (PREINCREMENT_EXPR, "preincrement_expr", tcc_expression, 2) | |
895 DEFTREECODE (POSTDECREMENT_EXPR, "postdecrement_expr", tcc_expression, 2) | |
896 DEFTREECODE (POSTINCREMENT_EXPR, "postincrement_expr", tcc_expression, 2) | |
897 | |
898 /* Used to implement `va_arg'. */ | |
899 DEFTREECODE (VA_ARG_EXPR, "va_arg_expr", tcc_expression, 1) | |
900 | |
111 | 901 /* Evaluate operand 0. If and only if an exception is thrown during |
902 the evaluation of operand 0, evaluate operand 1. | |
0 | 903 |
111 | 904 This differs from TRY_FINALLY_EXPR in that operand 1 is not evaluated |
0 | 905 on a normal or jump exit, only on an exception. */ |
906 DEFTREECODE (TRY_CATCH_EXPR, "try_catch_expr", tcc_statement, 2) | |
907 | |
908 /* Evaluate the first operand. | |
909 The second operand is a cleanup expression which is evaluated | |
910 on any exit (normal, exception, or jump out) from this expression. */ | |
911 DEFTREECODE (TRY_FINALLY_EXPR, "try_finally", tcc_statement, 2) | |
912 | |
913 /* These types of expressions have no useful value, | |
914 and always have side effects. */ | |
915 | |
916 /* Used to represent a local declaration. The operand is DECL_EXPR_DECL. */ | |
917 DEFTREECODE (DECL_EXPR, "decl_expr", tcc_statement, 1) | |
918 | |
919 /* A label definition, encapsulated as a statement. | |
920 Operand 0 is the LABEL_DECL node for the label that appears here. | |
921 The type should be void and the value should be ignored. */ | |
922 DEFTREECODE (LABEL_EXPR, "label_expr", tcc_statement, 1) | |
923 | |
924 /* GOTO. Operand 0 is a LABEL_DECL node or an expression. | |
925 The type should be void and the value should be ignored. */ | |
926 DEFTREECODE (GOTO_EXPR, "goto_expr", tcc_statement, 1) | |
927 | |
928 /* RETURN. Evaluates operand 0, then returns from the current function. | |
929 Presumably that operand is an assignment that stores into the | |
930 RESULT_DECL that hold the value to be returned. | |
931 The operand may be null. | |
932 The type should be void and the value should be ignored. */ | |
933 DEFTREECODE (RETURN_EXPR, "return_expr", tcc_statement, 1) | |
934 | |
935 /* Exit the inner most loop conditionally. Operand 0 is the condition. | |
936 The type should be void and the value should be ignored. */ | |
937 DEFTREECODE (EXIT_EXPR, "exit_expr", tcc_statement, 1) | |
938 | |
939 /* A loop. Operand 0 is the body of the loop. | |
940 It must contain an EXIT_EXPR or is an infinite loop. | |
941 The type should be void and the value should be ignored. */ | |
942 DEFTREECODE (LOOP_EXPR, "loop_expr", tcc_statement, 1) | |
943 | |
944 /* Switch expression. | |
945 | |
946 TREE_TYPE is the original type of the condition, before any | |
947 language required type conversions. It may be NULL, in which case | |
948 the original type and final types are assumed to be the same. | |
949 | |
950 Operand 0 is the expression used to perform the branch, | |
951 Operand 1 is the body of the switch, which probably contains | |
952 CASE_LABEL_EXPRs. It may also be NULL, in which case operand 2 | |
131 | 953 must not be NULL. */ |
954 DEFTREECODE (SWITCH_EXPR, "switch_expr", tcc_statement, 2) | |
0 | 955 |
111 | 956 /* Used to represent a case label. |
957 | |
958 Operand 0 is CASE_LOW. It may be NULL_TREE, in which case the label | |
959 is a 'default' label. | |
960 Operand 1 is CASE_HIGH. If it is NULL_TREE, the label is a simple | |
961 (one-value) case label. If it is non-NULL_TREE, the case is a range. | |
962 Operand 2 is CASE_LABEL, which is is the corresponding LABEL_DECL. | |
963 Operand 3 is CASE_CHAIN. This operand is only used in tree-cfg.c to | |
964 speed up the lookup of case labels which use a particular edge in | |
965 the control flow graph. */ | |
966 DEFTREECODE (CASE_LABEL_EXPR, "case_label_expr", tcc_statement, 4) | |
0 | 967 |
968 /* Used to represent an inline assembly statement. ASM_STRING returns a | |
969 STRING_CST for the instruction (e.g., "mov x, y"). ASM_OUTPUTS, | |
970 ASM_INPUTS, and ASM_CLOBBERS represent the outputs, inputs, and clobbers | |
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971 for the statement. ASM_LABELS, if present, indicates various destinations |
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972 for the asm; labels cannot be combined with outputs. */ |
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973 DEFTREECODE (ASM_EXPR, "asm_expr", tcc_statement, 5) |
0 | 974 |
975 /* Variable references for SSA analysis. New SSA names are created every | |
976 time a variable is assigned a new value. The SSA builder uses SSA_NAME | |
977 nodes to implement SSA versioning. */ | |
978 DEFTREECODE (SSA_NAME, "ssa_name", tcc_exceptional, 0) | |
979 | |
980 /* Used to represent a typed exception handler. CATCH_TYPES is the type (or | |
981 list of types) handled, and CATCH_BODY is the code for the handler. */ | |
982 DEFTREECODE (CATCH_EXPR, "catch_expr", tcc_statement, 2) | |
983 | |
984 /* Used to represent an exception specification. EH_FILTER_TYPES is a list | |
985 of allowed types, and EH_FILTER_FAILURE is an expression to evaluate on | |
111 | 986 failure. */ |
0 | 987 DEFTREECODE (EH_FILTER_EXPR, "eh_filter_expr", tcc_statement, 2) |
988 | |
989 /* Node used for describing a property that is known at compile | |
990 time. */ | |
991 DEFTREECODE (SCEV_KNOWN, "scev_known", tcc_expression, 0) | |
992 | |
993 /* Node used for describing a property that is not known at compile | |
994 time. */ | |
995 DEFTREECODE (SCEV_NOT_KNOWN, "scev_not_known", tcc_expression, 0) | |
996 | |
997 /* Polynomial chains of recurrences. | |
111 | 998 cr = {CHREC_LEFT (cr), +, CHREC_RIGHT (cr)}_CHREC_VARIABLE (cr). */ |
999 DEFTREECODE (POLYNOMIAL_CHREC, "polynomial_chrec", tcc_expression, 2) | |
0 | 1000 |
1001 /* Used to chain children of container statements together. | |
1002 Use the interface in tree-iterator.h to access this node. */ | |
1003 DEFTREECODE (STATEMENT_LIST, "statement_list", tcc_exceptional, 0) | |
1004 | |
1005 /* Predicate assertion. Artificial expression generated by the optimizers | |
1006 to keep track of predicate values. This expression may only appear on | |
1007 the RHS of assignments. | |
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1008 |
0 | 1009 Given X = ASSERT_EXPR <Y, EXPR>, the optimizers can infer |
1010 two things: | |
1011 | |
1012 1- X is a copy of Y. | |
1013 2- EXPR is a conditional expression and is known to be true. | |
1014 | |
1015 Valid and to be expected forms of conditional expressions are | |
1016 valid GIMPLE conditional expressions (as defined by is_gimple_condexpr) | |
1017 and conditional expressions with the first operand being a | |
1018 PLUS_EXPR with a variable possibly wrapped in a NOP_EXPR first | |
1019 operand and an integer constant second operand. | |
1020 | |
1021 The type of the expression is the same as Y. */ | |
1022 DEFTREECODE (ASSERT_EXPR, "assert_expr", tcc_expression, 2) | |
1023 | |
1024 /* Base class information. Holds information about a class as a | |
1025 baseclass of itself or another class. */ | |
1026 DEFTREECODE (TREE_BINFO, "tree_binfo", tcc_exceptional, 0) | |
1027 | |
1028 /* Records the size for an expression of variable size type. This is | |
1029 for use in contexts in which we are accessing the entire object, | |
1030 such as for a function call, or block copy. | |
1031 Operand 0 is the real expression. | |
1032 Operand 1 is the size of the type in the expression. */ | |
1033 DEFTREECODE (WITH_SIZE_EXPR, "with_size_expr", tcc_expression, 2) | |
1034 | |
1035 /* Extract elements from two input vectors Operand 0 and Operand 1 | |
1036 size VS, according to the offset OFF defined by Operand 2 as | |
1037 follows: | |
1038 If OFF > 0, the last VS - OFF elements of vector OP0 are concatenated to | |
1039 the first OFF elements of the vector OP1. | |
1040 If OFF == 0, then the returned vector is OP1. | |
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1041 On different targets OFF may take different forms; It can be an address, in |
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1042 which case its low log2(VS)-1 bits define the offset, or it can be a mask |
0 | 1043 generated by the builtin targetm.vectorize.mask_for_load_builtin_decl. */ |
1044 DEFTREECODE (REALIGN_LOAD_EXPR, "realign_load", tcc_expression, 3) | |
1045 | |
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1046 /* Low-level memory addressing. Operands are BASE (address of static or |
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1047 global variable or register), OFFSET (integer constant), |
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1048 INDEX (register), STEP (integer constant), INDEX2 (register), |
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1049 The corresponding address is BASE + STEP * INDEX + INDEX2 + OFFSET. |
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1050 Only variations and values valid on the target are allowed. |
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1051 |
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1052 The type of STEP, INDEX and INDEX2 is sizetype. |
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1053 |
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1054 The type of BASE is a pointer type. If BASE is not an address of |
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1055 a static or global variable INDEX2 will be NULL. |
0 | 1056 |
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1057 The type of OFFSET is a pointer type and determines TBAA the same as |
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1058 the constant offset operand in MEM_REF. */ |
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1059 |
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1060 DEFTREECODE (TARGET_MEM_REF, "target_mem_ref", tcc_reference, 5) |
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1061 |
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1062 /* Memory addressing. Operands are a pointer and a tree constant integer |
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1063 byte offset of the pointer type that when dereferenced yields the |
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1064 type of the base object the pointer points into and which is used for |
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1065 TBAA purposes. |
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1066 The type of the MEM_REF is the type the bytes at the memory location |
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1067 are interpreted as. |
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1068 MEM_REF <p, c> is equivalent to ((typeof(c))p)->x... where x... is a |
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1069 chain of component references offsetting p by c. */ |
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1070 DEFTREECODE (MEM_REF, "mem_ref", tcc_reference, 2) |
0 | 1071 |
111 | 1072 /* OpenACC and OpenMP. As it is exposed in TREE_RANGE_CHECK invocations, do |
1073 not change the ordering of these codes. */ | |
1074 | |
1075 /* OpenACC - #pragma acc parallel [clause1 ... clauseN] | |
1076 Operand 0: OMP_BODY: Code to be executed in parallel. | |
1077 Operand 1: OMP_CLAUSES: List of clauses. */ | |
1078 | |
1079 DEFTREECODE (OACC_PARALLEL, "oacc_parallel", tcc_statement, 2) | |
1080 | |
1081 /* OpenACC - #pragma acc kernels [clause1 ... clauseN] | |
1082 Operand 0: OMP_BODY: Sequence of kernels. | |
1083 Operand 1: OMP_CLAUSES: List of clauses. */ | |
1084 | |
1085 DEFTREECODE (OACC_KERNELS, "oacc_kernels", tcc_statement, 2) | |
1086 | |
1087 /* OpenACC - #pragma acc data [clause1 ... clauseN] | |
1088 Operand 0: OACC_DATA_BODY: Data construct body. | |
1089 Operand 1: OACC_DATA_CLAUSES: List of clauses. */ | |
1090 | |
1091 DEFTREECODE (OACC_DATA, "oacc_data", tcc_statement, 2) | |
1092 | |
1093 /* OpenACC - #pragma acc host_data [clause1 ... clauseN] | |
1094 Operand 0: OACC_HOST_DATA_BODY: Host_data construct body. | |
1095 Operand 1: OACC_HOST_DATA_CLAUSES: List of clauses. */ | |
1096 | |
1097 DEFTREECODE (OACC_HOST_DATA, "oacc_host_data", tcc_statement, 2) | |
1098 | |
0 | 1099 /* OpenMP - #pragma omp parallel [clause1 ... clauseN] |
1100 Operand 0: OMP_PARALLEL_BODY: Code to be executed by all threads. | |
1101 Operand 1: OMP_PARALLEL_CLAUSES: List of clauses. */ | |
1102 | |
1103 DEFTREECODE (OMP_PARALLEL, "omp_parallel", tcc_statement, 2) | |
1104 | |
1105 /* OpenMP - #pragma omp task [clause1 ... clauseN] | |
1106 Operand 0: OMP_TASK_BODY: Code to be executed by all threads. | |
1107 Operand 1: OMP_TASK_CLAUSES: List of clauses. */ | |
1108 | |
1109 DEFTREECODE (OMP_TASK, "omp_task", tcc_statement, 2) | |
1110 | |
1111 /* OpenMP - #pragma omp for [clause1 ... clauseN] | |
1112 Operand 0: OMP_FOR_BODY: Loop body. | |
1113 Operand 1: OMP_FOR_CLAUSES: List of clauses. | |
1114 Operand 2: OMP_FOR_INIT: Initialization code of the form | |
1115 VAR = N1. | |
1116 Operand 3: OMP_FOR_COND: Loop conditional expression of the form | |
1117 VAR { <, >, <=, >= } N2. | |
1118 Operand 4: OMP_FOR_INCR: Loop index increment of the form | |
1119 VAR { +=, -= } INCR. | |
1120 Operand 5: OMP_FOR_PRE_BODY: Filled by the gimplifier with things | |
1121 from INIT, COND, and INCR that are technically part of the | |
1122 OMP_FOR structured block, but are evaluated before the loop | |
1123 body begins. | |
111 | 1124 Operand 6: OMP_FOR_ORIG_DECLS: If non-NULL, list of DECLs initialized |
1125 in OMP_FOR_INIT. In some cases, like C++ iterators, the original | |
1126 DECL init has been lost in gimplification and now contains a | |
1127 temporary (D.nnnn). This list contains the original DECLs in | |
1128 the source. | |
0 | 1129 |
1130 VAR must be an integer or pointer variable, which is implicitly thread | |
1131 private. N1, N2 and INCR are required to be loop invariant integer | |
1132 expressions that are evaluated without any synchronization. | |
1133 The evaluation order, frequency of evaluation and side-effects are | |
111 | 1134 unspecified by the standards. */ |
1135 DEFTREECODE (OMP_FOR, "omp_for", tcc_statement, 7) | |
1136 | |
1137 /* OpenMP - #pragma omp simd [clause1 ... clauseN] | |
1138 Operands like for OMP_FOR. */ | |
1139 DEFTREECODE (OMP_SIMD, "omp_simd", tcc_statement, 7) | |
1140 | |
1141 /* OpenMP - #pragma omp distribute [clause1 ... clauseN] | |
1142 Operands like for OMP_FOR. */ | |
1143 DEFTREECODE (OMP_DISTRIBUTE, "omp_distribute", tcc_statement, 7) | |
1144 | |
1145 /* OpenMP - #pragma omp taskloop [clause1 ... clauseN] | |
1146 Operands like for OMP_FOR. */ | |
1147 DEFTREECODE (OMP_TASKLOOP, "omp_taskloop", tcc_statement, 7) | |
1148 | |
1149 /* OpenMP - #pragma acc loop [clause1 ... clauseN] | |
1150 Operands like for OMP_FOR. */ | |
1151 DEFTREECODE (OACC_LOOP, "oacc_loop", tcc_statement, 7) | |
1152 | |
1153 /* OpenMP - #pragma omp teams [clause1 ... clauseN] | |
1154 Operand 0: OMP_TEAMS_BODY: Teams body. | |
1155 Operand 1: OMP_TEAMS_CLAUSES: List of clauses. */ | |
1156 DEFTREECODE (OMP_TEAMS, "omp_teams", tcc_statement, 2) | |
1157 | |
1158 /* OpenMP - #pragma omp target data [clause1 ... clauseN] | |
1159 Operand 0: OMP_TARGET_DATA_BODY: Target data construct body. | |
1160 Operand 1: OMP_TARGET_DATA_CLAUSES: List of clauses. */ | |
1161 DEFTREECODE (OMP_TARGET_DATA, "omp_target_data", tcc_statement, 2) | |
1162 | |
1163 /* OpenMP - #pragma omp target [clause1 ... clauseN] | |
1164 Operand 0: OMP_TARGET_BODY: Target construct body. | |
1165 Operand 1: OMP_TARGET_CLAUSES: List of clauses. */ | |
1166 DEFTREECODE (OMP_TARGET, "omp_target", tcc_statement, 2) | |
0 | 1167 |
1168 /* OpenMP - #pragma omp sections [clause1 ... clauseN] | |
1169 Operand 0: OMP_SECTIONS_BODY: Sections body. | |
1170 Operand 1: OMP_SECTIONS_CLAUSES: List of clauses. */ | |
1171 DEFTREECODE (OMP_SECTIONS, "omp_sections", tcc_statement, 2) | |
1172 | |
111 | 1173 /* OpenMP - #pragma omp ordered |
1174 Operand 0: OMP_ORDERED_BODY: Master section body. | |
1175 Operand 1: OMP_ORDERED_CLAUSES: List of clauses. */ | |
1176 DEFTREECODE (OMP_ORDERED, "omp_ordered", tcc_statement, 2) | |
1177 | |
1178 /* OpenMP - #pragma omp critical [name] | |
1179 Operand 0: OMP_CRITICAL_BODY: Critical section body. | |
1180 Operand 1: OMP_CRITICAL_CLAUSES: List of clauses. | |
1181 Operand 2: OMP_CRITICAL_NAME: Identifier for critical section. */ | |
1182 DEFTREECODE (OMP_CRITICAL, "omp_critical", tcc_statement, 3) | |
1183 | |
0 | 1184 /* OpenMP - #pragma omp single |
1185 Operand 0: OMP_SINGLE_BODY: Single section body. | |
1186 Operand 1: OMP_SINGLE_CLAUSES: List of clauses. */ | |
1187 DEFTREECODE (OMP_SINGLE, "omp_single", tcc_statement, 2) | |
1188 | |
1189 /* OpenMP - #pragma omp section | |
1190 Operand 0: OMP_SECTION_BODY: Section body. */ | |
1191 DEFTREECODE (OMP_SECTION, "omp_section", tcc_statement, 1) | |
1192 | |
1193 /* OpenMP - #pragma omp master | |
1194 Operand 0: OMP_MASTER_BODY: Master section body. */ | |
1195 DEFTREECODE (OMP_MASTER, "omp_master", tcc_statement, 1) | |
1196 | |
111 | 1197 /* OpenMP - #pragma omp taskgroup |
1198 Operand 0: OMP_TASKGROUP_BODY: Taskgroup body. */ | |
1199 DEFTREECODE (OMP_TASKGROUP, "omp_taskgroup", tcc_statement, 1) | |
1200 | |
1201 /* OpenACC - #pragma acc cache (variable1 ... variableN) | |
1202 Operand 0: OACC_CACHE_CLAUSES: List of variables (transformed into | |
1203 OMP_CLAUSE__CACHE_ clauses). */ | |
1204 DEFTREECODE (OACC_CACHE, "oacc_cache", tcc_statement, 1) | |
1205 | |
1206 /* OpenACC - #pragma acc declare [clause1 ... clauseN] | |
1207 Operand 0: OACC_DECLARE_CLAUSES: List of clauses. */ | |
1208 DEFTREECODE (OACC_DECLARE, "oacc_declare", tcc_statement, 1) | |
1209 | |
1210 /* OpenACC - #pragma acc enter data [clause1 ... clauseN] | |
1211 Operand 0: OACC_ENTER_DATA_CLAUSES: List of clauses. */ | |
1212 DEFTREECODE (OACC_ENTER_DATA, "oacc_enter_data", tcc_statement, 1) | |
0 | 1213 |
111 | 1214 /* OpenACC - #pragma acc exit data [clause1 ... clauseN] |
1215 Operand 0: OACC_EXIT_DATA_CLAUSES: List of clauses. */ | |
1216 DEFTREECODE (OACC_EXIT_DATA, "oacc_exit_data", tcc_statement, 1) | |
1217 | |
1218 /* OpenACC - #pragma acc update [clause1 ... clauseN] | |
1219 Operand 0: OACC_UPDATE_CLAUSES: List of clauses. */ | |
1220 DEFTREECODE (OACC_UPDATE, "oacc_update", tcc_statement, 1) | |
1221 | |
1222 /* OpenMP - #pragma omp target update [clause1 ... clauseN] | |
1223 Operand 0: OMP_TARGET_UPDATE_CLAUSES: List of clauses. */ | |
1224 DEFTREECODE (OMP_TARGET_UPDATE, "omp_target_update", tcc_statement, 1) | |
1225 | |
1226 /* OpenMP - #pragma omp target enter data [clause1 ... clauseN] | |
1227 Operand 0: OMP_TARGET_ENTER_DATA_CLAUSES: List of clauses. */ | |
1228 DEFTREECODE (OMP_TARGET_ENTER_DATA, "omp_target_enter_data", tcc_statement, 1) | |
1229 | |
1230 /* OpenMP - #pragma omp target exit data [clause1 ... clauseN] | |
1231 Operand 0: OMP_TARGET_EXIT_DATA_CLAUSES: List of clauses. */ | |
1232 DEFTREECODE (OMP_TARGET_EXIT_DATA, "omp_target_exit_data", tcc_statement, 1) | |
1233 | |
1234 /* OMP_ATOMIC through OMP_ATOMIC_CAPTURE_NEW must be consecutive, | |
1235 or OMP_ATOMIC_SEQ_CST needs adjusting. */ | |
0 | 1236 |
1237 /* OpenMP - #pragma omp atomic | |
1238 Operand 0: The address at which the atomic operation is to be performed. | |
1239 This address should be stabilized with save_expr. | |
1240 Operand 1: The expression to evaluate. When the old value of the object | |
1241 at the address is used in the expression, it should appear as if | |
1242 build_fold_indirect_ref of the address. */ | |
1243 DEFTREECODE (OMP_ATOMIC, "omp_atomic", tcc_statement, 2) | |
1244 | |
111 | 1245 /* OpenMP - #pragma omp atomic read |
1246 Operand 0: The address at which the atomic operation is to be performed. | |
1247 This address should be stabilized with save_expr. */ | |
1248 DEFTREECODE (OMP_ATOMIC_READ, "omp_atomic_read", tcc_statement, 1) | |
1249 | |
1250 /* OpenMP - #pragma omp atomic capture | |
1251 Operand 0: The address at which the atomic operation is to be performed. | |
1252 This address should be stabilized with save_expr. | |
1253 Operand 1: The expression to evaluate. When the old value of the object | |
1254 at the address is used in the expression, it should appear as if | |
1255 build_fold_indirect_ref of the address. | |
1256 OMP_ATOMIC_CAPTURE_OLD returns the old memory content, | |
1257 OMP_ATOMIC_CAPTURE_NEW the new value. */ | |
1258 DEFTREECODE (OMP_ATOMIC_CAPTURE_OLD, "omp_atomic_capture_old", tcc_statement, 2) | |
1259 DEFTREECODE (OMP_ATOMIC_CAPTURE_NEW, "omp_atomic_capture_new", tcc_statement, 2) | |
1260 | |
0 | 1261 /* OpenMP clauses. */ |
1262 DEFTREECODE (OMP_CLAUSE, "omp_clause", tcc_exceptional, 0) | |
1263 | |
111 | 1264 /* TRANSACTION_EXPR tree code. |
1265 Operand 0: BODY: contains body of the transaction. */ | |
1266 DEFTREECODE (TRANSACTION_EXPR, "transaction_expr", tcc_expression, 1) | |
1267 | |
0 | 1268 /* Widening dot-product. |
1269 The first two arguments are of type t1. | |
1270 The third argument and the result are of type t2, such that t2 is at least | |
1271 twice the size of t1. DOT_PROD_EXPR(arg1,arg2,arg3) is equivalent to: | |
1272 tmp = WIDEN_MULT_EXPR(arg1, arg2); | |
1273 arg3 = PLUS_EXPR (tmp, arg3); | |
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1274 or: |
0 | 1275 tmp = WIDEN_MULT_EXPR(arg1, arg2); |
1276 arg3 = WIDEN_SUM_EXPR (tmp, arg3); */ | |
1277 DEFTREECODE (DOT_PROD_EXPR, "dot_prod_expr", tcc_expression, 3) | |
1278 | |
1279 /* Widening summation. | |
1280 The first argument is of type t1. | |
1281 The second argument is of type t2, such that t2 is at least twice | |
1282 the size of t1. The type of the entire expression is also t2. | |
1283 WIDEN_SUM_EXPR is equivalent to first widening (promoting) | |
1284 the first argument from type t1 to type t2, and then summing it | |
1285 with the second argument. */ | |
1286 DEFTREECODE (WIDEN_SUM_EXPR, "widen_sum_expr", tcc_binary, 2) | |
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1287 |
111 | 1288 /* Widening sad (sum of absolute differences). |
1289 The first two arguments are of type t1 which should be integer. | |
1290 The third argument and the result are of type t2, such that t2 is at least | |
1291 twice the size of t1. Like DOT_PROD_EXPR, SAD_EXPR (arg1,arg2,arg3) is | |
1292 equivalent to (note we don't have WIDEN_MINUS_EXPR now, but we assume its | |
1293 behavior is similar to WIDEN_SUM_EXPR): | |
1294 tmp = WIDEN_MINUS_EXPR (arg1, arg2) | |
1295 tmp2 = ABS_EXPR (tmp) | |
1296 arg3 = PLUS_EXPR (tmp2, arg3) | |
1297 or: | |
1298 tmp = WIDEN_MINUS_EXPR (arg1, arg2) | |
1299 tmp2 = ABS_EXPR (tmp) | |
1300 arg3 = WIDEN_SUM_EXPR (tmp2, arg3) | |
1301 */ | |
1302 DEFTREECODE (SAD_EXPR, "sad_expr", tcc_expression, 3) | |
1303 | |
0 | 1304 /* Widening multiplication. |
1305 The two arguments are of type t1. | |
1306 The result is of type t2, such that t2 is at least twice | |
1307 the size of t1. WIDEN_MULT_EXPR is equivalent to first widening (promoting) | |
1308 the arguments from type t1 to type t2, and then multiplying them. */ | |
1309 DEFTREECODE (WIDEN_MULT_EXPR, "widen_mult_expr", tcc_binary, 2) | |
1310 | |
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1311 /* Widening multiply-accumulate. |
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1312 The first two arguments are of type t1. |
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1313 The third argument and the result are of type t2, such as t2 is at least |
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1314 twice the size of t1. t1 and t2 must be integral or fixed-point types. |
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1315 The expression is equivalent to a WIDEN_MULT_EXPR operation |
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1316 of the first two operands followed by an add or subtract of the third |
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1317 operand. */ |
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1318 DEFTREECODE (WIDEN_MULT_PLUS_EXPR, "widen_mult_plus_expr", tcc_expression, 3) |
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1319 /* This is like the above, except in the final expression the multiply result |
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1320 is subtracted from t3. */ |
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1321 DEFTREECODE (WIDEN_MULT_MINUS_EXPR, "widen_mult_minus_expr", tcc_expression, 3) |
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1322 |
111 | 1323 /* Widening shift left. |
1324 The first operand is of type t1. | |
1325 The second operand is the number of bits to shift by; it need not be the | |
1326 same type as the first operand and result. | |
1327 Note that the result is undefined if the second operand is larger | |
1328 than or equal to the first operand's type size. | |
1329 The type of the entire expression is t2, such that t2 is at least twice | |
1330 the size of t1. | |
1331 WIDEN_LSHIFT_EXPR is equivalent to first widening (promoting) | |
1332 the first argument from type t1 to type t2, and then shifting it | |
1333 by the second argument. */ | |
1334 DEFTREECODE (WIDEN_LSHIFT_EXPR, "widen_lshift_expr", tcc_binary, 2) | |
1335 | |
0 | 1336 /* Widening vector multiplication. |
1337 The two operands are vectors with N elements of size S. Multiplying the | |
1338 elements of the two vectors will result in N products of size 2*S. | |
1339 VEC_WIDEN_MULT_HI_EXPR computes the N/2 high products. | |
1340 VEC_WIDEN_MULT_LO_EXPR computes the N/2 low products. */ | |
1341 DEFTREECODE (VEC_WIDEN_MULT_HI_EXPR, "widen_mult_hi_expr", tcc_binary, 2) | |
1342 DEFTREECODE (VEC_WIDEN_MULT_LO_EXPR, "widen_mult_lo_expr", tcc_binary, 2) | |
1343 | |
111 | 1344 /* Similarly, but return the even or odd N/2 products. */ |
1345 DEFTREECODE (VEC_WIDEN_MULT_EVEN_EXPR, "widen_mult_even_expr", tcc_binary, 2) | |
1346 DEFTREECODE (VEC_WIDEN_MULT_ODD_EXPR, "widen_mult_odd_expr", tcc_binary, 2) | |
1347 | |
0 | 1348 /* Unpack (extract and promote/widen) the high/low elements of the input |
1349 vector into the output vector. The input vector has twice as many | |
1350 elements as the output vector, that are half the size of the elements | |
1351 of the output vector. This is used to support type promotion. */ | |
1352 DEFTREECODE (VEC_UNPACK_HI_EXPR, "vec_unpack_hi_expr", tcc_unary, 1) | |
1353 DEFTREECODE (VEC_UNPACK_LO_EXPR, "vec_unpack_lo_expr", tcc_unary, 1) | |
1354 | |
1355 /* Unpack (extract) the high/low elements of the input vector, convert | |
1356 fixed point values to floating point and widen elements into the | |
1357 output vector. The input vector has twice as many elements as the output | |
1358 vector, that are half the size of the elements of the output vector. */ | |
1359 DEFTREECODE (VEC_UNPACK_FLOAT_HI_EXPR, "vec_unpack_float_hi_expr", tcc_unary, 1) | |
1360 DEFTREECODE (VEC_UNPACK_FLOAT_LO_EXPR, "vec_unpack_float_lo_expr", tcc_unary, 1) | |
1361 | |
131 | 1362 /* Unpack (extract) the high/low elements of the input vector, convert |
1363 floating point values to integer and widen elements into the output | |
1364 vector. The input vector has twice as many elements as the output | |
1365 vector, that are half the size of the elements of the output vector. */ | |
1366 DEFTREECODE (VEC_UNPACK_FIX_TRUNC_HI_EXPR, "vec_unpack_fix_trunc_hi_expr", | |
1367 tcc_unary, 1) | |
1368 DEFTREECODE (VEC_UNPACK_FIX_TRUNC_LO_EXPR, "vec_unpack_fix_trunc_lo_expr", | |
1369 tcc_unary, 1) | |
1370 | |
0 | 1371 /* Pack (demote/narrow and merge) the elements of the two input vectors |
1372 into the output vector using truncation/saturation. | |
1373 The elements of the input vectors are twice the size of the elements of the | |
1374 output vector. This is used to support type demotion. */ | |
1375 DEFTREECODE (VEC_PACK_TRUNC_EXPR, "vec_pack_trunc_expr", tcc_binary, 2) | |
1376 DEFTREECODE (VEC_PACK_SAT_EXPR, "vec_pack_sat_expr", tcc_binary, 2) | |
1377 | |
1378 /* Convert floating point values of the two input vectors to integer | |
1379 and pack (narrow and merge) the elements into the output vector. The | |
1380 elements of the input vector are twice the size of the elements of | |
1381 the output vector. */ | |
1382 DEFTREECODE (VEC_PACK_FIX_TRUNC_EXPR, "vec_pack_fix_trunc_expr", tcc_binary, 2) | |
1383 | |
131 | 1384 /* Convert fixed point values of the two input vectors to floating point |
1385 and pack (narrow and merge) the elements into the output vector. The | |
1386 elements of the input vector are twice the size of the elements of | |
1387 the output vector. */ | |
1388 DEFTREECODE (VEC_PACK_FLOAT_EXPR, "vec_pack_float_expr", tcc_binary, 2) | |
1389 | |
111 | 1390 /* Widening vector shift left in bits. |
1391 Operand 0 is a vector to be shifted with N elements of size S. | |
1392 Operand 1 is an integer shift amount in bits. | |
1393 The result of the operation is N elements of size 2*S. | |
1394 VEC_WIDEN_LSHIFT_HI_EXPR computes the N/2 high results. | |
1395 VEC_WIDEN_LSHIFT_LO_EXPR computes the N/2 low results. | |
1396 */ | |
1397 DEFTREECODE (VEC_WIDEN_LSHIFT_HI_EXPR, "widen_lshift_hi_expr", tcc_binary, 2) | |
1398 DEFTREECODE (VEC_WIDEN_LSHIFT_LO_EXPR, "widen_lshift_lo_expr", tcc_binary, 2) | |
0 | 1399 |
1400 /* PREDICT_EXPR. Specify hint for branch prediction. The | |
1401 PREDICT_EXPR_PREDICTOR specify predictor and PREDICT_EXPR_OUTCOME the | |
1402 outcome (0 for not taken and 1 for taken). Once the profile is guessed | |
1403 all conditional branches leading to execution paths executing the | |
1404 PREDICT_EXPR will get predicted by the specified predictor. */ | |
1405 DEFTREECODE (PREDICT_EXPR, "predict_expr", tcc_expression, 1) | |
1406 | |
1407 /* OPTIMIZATION_NODE. Node to store the optimization options. */ | |
1408 DEFTREECODE (OPTIMIZATION_NODE, "optimization_node", tcc_exceptional, 0) | |
1409 | |
1410 /* TARGET_OPTION_NODE. Node to store the target specific options. */ | |
1411 DEFTREECODE (TARGET_OPTION_NODE, "target_option_node", tcc_exceptional, 0) | |
1412 | |
111 | 1413 /* ANNOTATE_EXPR. |
1414 Operand 0 is the expression to be annotated. | |
131 | 1415 Operand 1 is the annotation kind. |
1416 Operand 2 is additional data. */ | |
1417 DEFTREECODE (ANNOTATE_EXPR, "annotate_expr", tcc_expression, 3) | |
111 | 1418 |
0 | 1419 /* |
1420 Local variables: | |
1421 mode:c | |
1422 End: | |
1423 */ |