]>
Commit | Line | Data |
---|---|---|
247258b6 | 1 | /* This file contains the definitions and documentation for the |
bccafa26 | 2 | tree codes used in GCC. |
4a61a337 | 3 | Copyright (C) 1987, 1988, 1993, 1995, 1997, 1998, 2000, 2001, 2004, 2005, |
66723563 | 4 | 2006, 2007 Free Software Foundation, Inc. |
247258b6 | 5 | |
f12b58b3 | 6 | This file is part of GCC. |
247258b6 | 7 | |
f12b58b3 | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 10 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 11 | version. |
247258b6 | 12 | |
f12b58b3 | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
247258b6 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
247258b6 | 21 | |
b27ac6b5 | 22 | |
ce45a448 | 23 | /* For tcc_references, tcc_expression, tcc_comparison, tcc_unary, |
24 | tcc_binary, and tcc_statement nodes, which use struct tree_exp, the | |
25 | 4th element is the number of argument slots to allocate. This | |
26 | determines the size of the tree node object. Other nodes use | |
27 | different structures, and the size is determined by the tree_union | |
28 | member structure; the 4th element should be zero. Languages that | |
29 | define language-specific tcc_exceptional or tcc_constant codes must | |
9843a47d | 30 | define the tree_size langhook to say how big they are. |
31 | ||
32 | These tree codes have been sorted so that the macros in tree.h that | |
33 | check for various tree codes are optimized into range checks. This | |
e88bb3bb | 34 | gives a measurable performance improvement. When adding a new |
9843a47d | 35 | code, consider its placement in relation to the other codes. */ |
247258b6 | 36 | |
37 | /* Any erroneous construct is parsed into a node of this type. | |
38 | This type of node is accepted without complaint in all contexts | |
39 | by later parsing activities, to avoid multiple error messages | |
40 | for one error. | |
41 | No fields in these nodes are used except the TREE_CODE. */ | |
ce45a448 | 42 | DEFTREECODE (ERROR_MARK, "error_mark", tcc_exceptional, 0) |
247258b6 | 43 | |
44 | /* Used to represent a name (such as, in the DECL_NAME of a decl node). | |
45 | Internally it looks like a STRING_CST node. | |
46 | There is only one IDENTIFIER_NODE ever made for any particular name. | |
47 | Use `get_identifier' to get it (or create it, the first time). */ | |
ce45a448 | 48 | DEFTREECODE (IDENTIFIER_NODE, "identifier_node", tcc_exceptional, 0) |
247258b6 | 49 | |
247258b6 | 50 | /* Has the TREE_VALUE and TREE_PURPOSE fields. */ |
51 | /* These nodes are made into lists by chaining through the | |
52 | TREE_CHAIN field. The elements of the list live in the | |
53 | TREE_VALUE fields, while TREE_PURPOSE fields are occasionally | |
54 | used as well to get the effect of Lisp association lists. */ | |
ce45a448 | 55 | DEFTREECODE (TREE_LIST, "tree_list", tcc_exceptional, 0) |
247258b6 | 56 | |
57 | /* These nodes contain an array of tree nodes. */ | |
ce45a448 | 58 | DEFTREECODE (TREE_VEC, "tree_vec", tcc_exceptional, 0) |
247258b6 | 59 | |
60 | /* A symbol binding block. These are arranged in a tree, | |
61 | where the BLOCK_SUBBLOCKS field contains a chain of subblocks | |
62 | chained through the BLOCK_CHAIN field. | |
63 | BLOCK_SUPERCONTEXT points to the parent block. | |
64 | For a block which represents the outermost scope of a function, it | |
65 | points to the FUNCTION_DECL node. | |
66 | BLOCK_VARS points to a chain of decl nodes. | |
247258b6 | 67 | BLOCK_CHAIN points to the next BLOCK at the same level. |
68 | BLOCK_ABSTRACT_ORIGIN points to the original (abstract) tree node which | |
69 | this block is an instance of, or else is NULL to indicate that this | |
70 | block is not an instance of anything else. When non-NULL, the value | |
71 | could either point to another BLOCK node or it could point to a | |
72 | FUNCTION_DECL node (e.g. in the case of a block representing the | |
73 | outermost scope of a particular inlining of a function). | |
f712a0dc | 74 | BLOCK_ABSTRACT is nonzero if the block represents an abstract |
247258b6 | 75 | instance of a block (i.e. one which is nested within an abstract |
b27ac6b5 | 76 | instance of an inline function). |
f712a0dc | 77 | TREE_ASM_WRITTEN is nonzero if the block was actually referenced |
5846cb0f | 78 | in the generated assembly. */ |
ce45a448 | 79 | DEFTREECODE (BLOCK, "block", tcc_exceptional, 0) |
247258b6 | 80 | \f |
81 | /* Each data type is represented by a tree node whose code is one of | |
82 | the following: */ | |
83 | /* Each node that represents a data type has a component TYPE_SIZE | |
84 | containing a tree that is an expression for the size in bits. | |
85 | The TYPE_MODE contains the machine mode for values of this type. | |
86 | The TYPE_POINTER_TO field contains a type for a pointer to this type, | |
87 | or zero if no such has been created yet. | |
88 | The TYPE_NEXT_VARIANT field is used to chain together types | |
89 | that are variants made by type modifiers such as "const" and "volatile". | |
90 | The TYPE_MAIN_VARIANT field, in any member of such a chain, | |
91 | points to the start of the chain. | |
92 | The TYPE_NONCOPIED_PARTS field is a list specifying which parts | |
93 | of an object of this type should *not* be copied by assignment. | |
c3bac92c | 94 | The TREE_VALUE of each is a FIELD_DECL that should not be |
95 | copied. The TREE_PURPOSE is an initial value for that field when | |
96 | an object of this type is initialized via an INIT_EXPR. It may | |
97 | be NULL if no special value is required. Even the things in this | |
98 | list are copied if the right-hand side of an assignment is known | |
99 | to be a complete object (rather than being, perhaps, a subobject | |
100 | of some other object.) The determination of what constitutes a | |
101 | complete object is done by fixed_type_p. | |
247258b6 | 102 | The TYPE_NAME field contains info on the name used in the program |
103 | for this type (for GDB symbol table output). It is either a | |
104 | TYPE_DECL node, for types that are typedefs, or an IDENTIFIER_NODE | |
105 | in the case of structs, unions or enums that are known with a tag, | |
106 | or zero for types that have no special name. | |
107 | The TYPE_CONTEXT for any sort of type which could have a name or | |
108 | which could have named members (e.g. tagged types in C/C++) will | |
109 | point to the node which represents the scope of the given type, or | |
110 | will be NULL_TREE if the type has "file scope". For most types, this | |
111 | will point to a BLOCK node or a FUNCTION_DECL node, but it could also | |
112 | point to a FUNCTION_TYPE node (for types whose scope is limited to the | |
113 | formal parameter list of some function type specification) or it | |
7786a01d | 114 | could point to a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE node |
115 | (for C++ "member" types). | |
247258b6 | 116 | For non-tagged-types, TYPE_CONTEXT need not be set to anything in |
117 | particular, since any type which is of some type category (e.g. | |
118 | an array type or a function type) which cannot either have a name | |
7786a01d | 119 | itself or have named members doesn't really have a "scope" per se. |
120 | The TREE_CHAIN field is used as a forward-references to names for | |
121 | ENUMERAL_TYPE, RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE nodes; | |
122 | see below. */ | |
247258b6 | 123 | |
9843a47d | 124 | /* The ordering of the following codes is optimized for the checking |
125 | macros in tree.h. Changing the order will degrade the speed of the | |
63bf54cf | 126 | compiler. OFFSET_TYPE, ENUMERAL_TYPE, BOOLEAN_TYPE, INTEGER_TYPE, |
127 | REAL_TYPE, POINTER_TYPE. */ | |
9843a47d | 128 | |
129 | /* An offset is a pointer relative to an object. | |
130 | The TREE_TYPE field is the type of the object at the offset. | |
131 | The TYPE_OFFSET_BASETYPE points to the node for the type of object | |
132 | that the offset is relative to. */ | |
133 | DEFTREECODE (OFFSET_TYPE, "offset_type", tcc_type, 0) | |
8a95ab85 | 134 | |
247258b6 | 135 | /* C enums. The type node looks just like an INTEGER_TYPE node. |
136 | The symbols for the values of the enum type are defined by | |
137 | CONST_DECL nodes, but the type does not point to them; | |
d8828edf | 138 | however, the TYPE_VALUES is a list in which each element's TREE_PURPOSE |
247258b6 | 139 | is a name and the TREE_VALUE is the value (an INTEGER_CST node). */ |
140 | /* A forward reference `enum foo' when no enum named foo is defined yet | |
141 | has zero (a null pointer) in its TYPE_SIZE. The tag name is in | |
142 | the TYPE_NAME field. If the type is later defined, the normal | |
143 | fields are filled in. | |
7786a01d | 144 | RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE forward refs are |
145 | treated similarly. */ | |
ce45a448 | 146 | DEFTREECODE (ENUMERAL_TYPE, "enumeral_type", tcc_type, 0) |
247258b6 | 147 | |
9843a47d | 148 | /* Boolean type (true or false are the only values). Looks like an |
f7f07c95 | 149 | INTEGRAL_TYPE. */ |
ce45a448 | 150 | DEFTREECODE (BOOLEAN_TYPE, "boolean_type", tcc_type, 0) |
247258b6 | 151 | |
9843a47d | 152 | /* Integer types in all languages, including char in C. |
153 | Also used for sub-ranges of other discrete types. | |
154 | Has components TYPE_MIN_VALUE, TYPE_MAX_VALUE (expressions, inclusive) | |
155 | and TYPE_PRECISION (number of bits used by this type). | |
156 | In the case of a subrange type in Pascal, the TREE_TYPE | |
157 | of this will point at the supertype (another INTEGER_TYPE, | |
63bf54cf | 158 | or an ENUMERAL_TYPE or BOOLEAN_TYPE). |
9843a47d | 159 | Otherwise, the TREE_TYPE is zero. */ |
160 | DEFTREECODE (INTEGER_TYPE, "integer_type", tcc_type, 0) | |
161 | ||
162 | /* C's float and double. Different floating types are distinguished | |
163 | by machine mode and by the TYPE_SIZE and the TYPE_PRECISION. */ | |
164 | DEFTREECODE (REAL_TYPE, "real_type", tcc_type, 0) | |
165 | ||
166 | /* The ordering of the following codes is optimized for the checking | |
167 | macros in tree.h. Changing the order will degrade the speed of the | |
168 | compiler. POINTER_TYPE, REFERENCE_TYPE. Note that this range | |
f7f07c95 | 169 | overlaps the previous range of ordered types. */ |
9843a47d | 170 | |
247258b6 | 171 | /* All pointer-to-x types have code POINTER_TYPE. |
172 | The TREE_TYPE points to the node for the type pointed to. */ | |
ce45a448 | 173 | DEFTREECODE (POINTER_TYPE, "pointer_type", tcc_type, 0) |
247258b6 | 174 | |
06f0b99c | 175 | /* _Fract and _Accum types in Embedded-C. Different fixed-point types |
176 | are distinguished by machine mode and by the TYPE_SIZE and the | |
177 | TYPE_PRECISION. */ | |
178 | DEFTREECODE (FIXED_POINT_TYPE, "fixed_point_type", tcc_type, 0) | |
179 | ||
247258b6 | 180 | /* A reference is like a pointer except that it is coerced |
181 | automatically to the value it points to. Used in C++. */ | |
ce45a448 | 182 | DEFTREECODE (REFERENCE_TYPE, "reference_type", tcc_type, 0) |
247258b6 | 183 | |
9843a47d | 184 | /* The ordering of the following codes is optimized for the checking |
185 | macros in tree.h. Changing the order will degrade the speed of the | |
186 | compiler. COMPLEX_TYPE, VECTOR_TYPE, ARRAY_TYPE. */ | |
187 | ||
188 | /* Complex number types. The TREE_TYPE field is the data type | |
189 | of the real and imaginary parts. */ | |
190 | DEFTREECODE (COMPLEX_TYPE, "complex_type", tcc_type, 0) | |
247258b6 | 191 | |
9843a47d | 192 | /* Vector types. The TREE_TYPE field is the data type of the vector |
193 | elements. The TYPE_PRECISION field is the number of subparts of | |
194 | the vector. */ | |
195 | DEFTREECODE (VECTOR_TYPE, "vector_type", tcc_type, 0) | |
247258b6 | 196 | |
9843a47d | 197 | /* The ordering of the following codes is optimized for the checking |
198 | macros in tree.h. Changing the order will degrade the speed of the | |
199 | compiler. ARRAY_TYPE, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE. | |
200 | Note that this range overlaps the previous range. */ | |
201 | ||
247258b6 | 202 | /* Types of arrays. Special fields: |
203 | TREE_TYPE Type of an array element. | |
204 | TYPE_DOMAIN Type to index by. | |
205 | Its range of values specifies the array length. | |
247258b6 | 206 | The field TYPE_POINTER_TO (TREE_TYPE (array_type)) is always nonzero |
3ad9d272 | 207 | and holds the type to coerce a value of that array type to in C. |
208 | TYPE_STRING_FLAG indicates a string (in contrast to an array of chars) | |
9cb8e99f | 209 | in languages (such as Chill) that make a distinction. */ |
247258b6 | 210 | /* Array types in C or Pascal */ |
ce45a448 | 211 | DEFTREECODE (ARRAY_TYPE, "array_type", tcc_type, 0) |
247258b6 | 212 | |
247258b6 | 213 | /* Struct in C, or record in Pascal. */ |
214 | /* Special fields: | |
a3377a8b | 215 | TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct, |
216 | and VAR_DECLs, TYPE_DECLs and CONST_DECLs for record-scope variables, | |
217 | types and enumerators. | |
247258b6 | 218 | A few may need to be added for Pascal. */ |
219 | /* See the comment above, before ENUMERAL_TYPE, for how | |
220 | forward references to struct tags are handled in C. */ | |
ce45a448 | 221 | DEFTREECODE (RECORD_TYPE, "record_type", tcc_type, 0) |
247258b6 | 222 | |
223 | /* Union in C. Like a struct, except that the offsets of the fields | |
224 | will all be zero. */ | |
225 | /* See the comment above, before ENUMERAL_TYPE, for how | |
226 | forward references to union tags are handled in C. */ | |
ce45a448 | 227 | DEFTREECODE (UNION_TYPE, "union_type", tcc_type, 0) /* C union type */ |
247258b6 | 228 | |
7786a01d | 229 | /* Similar to UNION_TYPE, except that the expressions in DECL_QUALIFIER |
230 | in each FIELD_DECL determine what the union contains. The first | |
231 | field whose DECL_QUALIFIER expression is true is deemed to occupy | |
232 | the union. */ | |
ce45a448 | 233 | DEFTREECODE (QUAL_UNION_TYPE, "qual_union_type", tcc_type, 0) |
7786a01d | 234 | |
9843a47d | 235 | /* The ordering of the following codes is optimized for the checking |
236 | macros in tree.h. Changing the order will degrade the speed of the | |
237 | compiler. VOID_TYPE, FUNCTION_TYPE, METHOD_TYPE. */ | |
238 | ||
239 | /* The void type in C */ | |
240 | DEFTREECODE (VOID_TYPE, "void_type", tcc_type, 0) | |
241 | ||
247258b6 | 242 | /* Type of functions. Special fields: |
243 | TREE_TYPE type of value returned. | |
244 | TYPE_ARG_TYPES list of types of arguments expected. | |
245 | this list is made of TREE_LIST nodes. | |
246 | Types of "Procedures" in languages where they are different from functions | |
247 | have code FUNCTION_TYPE also, but then TREE_TYPE is zero or void type. */ | |
ce45a448 | 248 | DEFTREECODE (FUNCTION_TYPE, "function_type", tcc_type, 0) |
247258b6 | 249 | |
9843a47d | 250 | /* METHOD_TYPE is the type of a function which takes an extra first |
251 | argument for "self", which is not present in the declared argument list. | |
252 | The TREE_TYPE is the return type of the method. The TYPE_METHOD_BASETYPE | |
253 | is the type of "self". TYPE_ARG_TYPES is the real argument list, which | |
254 | includes the hidden argument for "self". */ | |
255 | DEFTREECODE (METHOD_TYPE, "method_type", tcc_type, 0) | |
256 | ||
247258b6 | 257 | /* This is a language-specific kind of type. |
258 | Its meaning is defined by the language front end. | |
259 | layout_type does not know how to lay this out, | |
260 | so the front-end must do so manually. */ | |
ce45a448 | 261 | DEFTREECODE (LANG_TYPE, "lang_type", tcc_type, 0) |
247258b6 | 262 | \f |
263 | /* Expressions */ | |
264 | ||
265 | /* First, the constants. */ | |
266 | ||
267 | /* Contents are in TREE_INT_CST_LOW and TREE_INT_CST_HIGH fields, | |
00b76131 | 268 | 32 bits each, giving us a 64 bit constant capability. INTEGER_CST |
269 | nodes can be shared, and therefore should be considered read only. | |
270 | They should be copied, before setting a flag such as | |
271 | TREE_OVERFLOW. If an INTEGER_CST has TREE_OVERFLOW or | |
272 | TREE_CONSTANT_OVERFLOW already set, it is known to be unique. | |
273 | INTEGER_CST nodes are created for the integral types, for pointer | |
274 | types and for vector and float types in some circumstances. */ | |
ce45a448 | 275 | DEFTREECODE (INTEGER_CST, "integer_cst", tcc_constant, 0) |
247258b6 | 276 | |
295e387a | 277 | /* Contents are in TREE_REAL_CST field. */ |
ce45a448 | 278 | DEFTREECODE (REAL_CST, "real_cst", tcc_constant, 0) |
247258b6 | 279 | |
06f0b99c | 280 | /* Contents are in TREE_FIXED_CST field. */ |
281 | DEFTREECODE (FIXED_CST, "fixed_cst", tcc_constant, 0) | |
282 | ||
247258b6 | 283 | /* Contents are in TREE_REALPART and TREE_IMAGPART fields, |
295e387a | 284 | whose contents are other constant nodes. */ |
ce45a448 | 285 | DEFTREECODE (COMPLEX_CST, "complex_cst", tcc_constant, 0) |
247258b6 | 286 | |
886cfd4f | 287 | /* Contents are in TREE_VECTOR_CST_ELTS field. */ |
ce45a448 | 288 | DEFTREECODE (VECTOR_CST, "vector_cst", tcc_constant, 0) |
886cfd4f | 289 | |
d5406300 | 290 | /* Contents are TREE_STRING_LENGTH and the actual contents of the string. */ |
ce45a448 | 291 | DEFTREECODE (STRING_CST, "string_cst", tcc_constant, 0) |
247258b6 | 292 | |
40109983 | 293 | /* Declarations. All references to names are represented as ..._DECL |
294 | nodes. The decls in one binding context are chained through the | |
295 | TREE_CHAIN field. Each DECL has a DECL_NAME field which contains | |
296 | an IDENTIFIER_NODE. (Some decls, most often labels, may have zero | |
297 | as the DECL_NAME). DECL_CONTEXT points to the node representing | |
298 | the context in which this declaration has its scope. For | |
299 | FIELD_DECLs, this is the RECORD_TYPE, UNION_TYPE, or | |
300 | QUAL_UNION_TYPE node that the field is a member of. For VAR_DECL, | |
301 | PARM_DECL, FUNCTION_DECL, LABEL_DECL, and CONST_DECL nodes, this | |
302 | points to either the FUNCTION_DECL for the containing function, the | |
303 | RECORD_TYPE or UNION_TYPE for the containing type, or NULL_TREE or | |
304 | a TRANSLATION_UNIT_DECL if the given decl has "file scope". | |
247258b6 | 305 | DECL_ABSTRACT_ORIGIN, if non-NULL, points to the original (abstract) |
306 | ..._DECL node of which this decl is an (inlined or template expanded) | |
307 | instance. | |
308 | The TREE_TYPE field holds the data type of the object, when relevant. | |
309 | LABEL_DECLs have no data type. For TYPE_DECL, the TREE_TYPE field | |
310 | contents are the type whose name is being declared. | |
311 | The DECL_ALIGN, DECL_SIZE, | |
312 | and DECL_MODE fields exist in decl nodes just as in type nodes. | |
313 | They are unused in LABEL_DECL, TYPE_DECL and CONST_DECL nodes. | |
314 | ||
40109983 | 315 | DECL_FIELD_BIT_OFFSET holds an integer number of bits offset for |
316 | the location. DECL_VOFFSET holds an expression for a variable | |
317 | offset; it is to be multiplied by DECL_VOFFSET_UNIT (an integer). | |
247258b6 | 318 | These fields are relevant only in FIELD_DECLs and PARM_DECLs. |
319 | ||
320 | DECL_INITIAL holds the value to initialize a variable to, | |
321 | or the value of a constant. For a function, it holds the body | |
322 | (a node of type BLOCK representing the function's binding contour | |
323 | and whose body contains the function's statements.) For a LABEL_DECL | |
324 | in C, it is a flag, nonzero if the label's definition has been seen. | |
325 | ||
326 | PARM_DECLs use a special field: | |
327 | DECL_ARG_TYPE is the type in which the argument is actually | |
328 | passed, which may be different from its type within the function. | |
329 | ||
330 | FUNCTION_DECLs use four special fields: | |
331 | DECL_ARGUMENTS holds a chain of PARM_DECL nodes for the arguments. | |
4b2f1f83 | 332 | DECL_RESULT holds a RESULT_DECL node for the value of a function. |
333 | The DECL_RTL field is 0 for a function that returns no value. | |
247258b6 | 334 | (C functions returning void have zero here.) |
a273aed1 | 335 | The TREE_TYPE field is the type in which the result is actually |
336 | returned. This is usually the same as the return type of the | |
337 | FUNCTION_DECL, but it may be a wider integer type because of | |
338 | promotion. | |
247258b6 | 339 | DECL_FUNCTION_CODE is a code number that is nonzero for |
340 | built-in functions. Its value is an enum built_in_function | |
341 | that says which built-in function it is. | |
342 | ||
346064d9 | 343 | DECL_SOURCE_FILE holds a filename string and DECL_SOURCE_LINE |
247258b6 | 344 | holds a line number. In some cases these can be the location of |
345 | a reference, if no definition has been seen. | |
346 | ||
f712a0dc | 347 | DECL_ABSTRACT is nonzero if the decl represents an abstract instance |
247258b6 | 348 | of a decl (i.e. one which is nested within an abstract instance of a |
349 | inline function. */ | |
350 | ||
ce45a448 | 351 | DEFTREECODE (FUNCTION_DECL, "function_decl", tcc_declaration, 0) |
352 | DEFTREECODE (LABEL_DECL, "label_decl", tcc_declaration, 0) | |
9843a47d | 353 | /* The ordering of the following codes is optimized for the checking |
354 | macros in tree.h. Changing the order will degrade the speed of the | |
355 | compiler. FIELD_DECL, VAR_DECL, CONST_DECL, PARM_DECL, | |
356 | TYPE_DECL. */ | |
357 | DEFTREECODE (FIELD_DECL, "field_decl", tcc_declaration, 0) | |
ce45a448 | 358 | DEFTREECODE (VAR_DECL, "var_decl", tcc_declaration, 0) |
9843a47d | 359 | DEFTREECODE (CONST_DECL, "const_decl", tcc_declaration, 0) |
ce45a448 | 360 | DEFTREECODE (PARM_DECL, "parm_decl", tcc_declaration, 0) |
9843a47d | 361 | DEFTREECODE (TYPE_DECL, "type_decl", tcc_declaration, 0) |
ce45a448 | 362 | DEFTREECODE (RESULT_DECL, "result_decl", tcc_declaration, 0) |
7c43cc0e | 363 | |
437f5d6b | 364 | /* Memory tags used in tree-ssa to represent memory locations in |
365 | virtual SSA. */ | |
366 | DEFTREECODE (STRUCT_FIELD_TAG, "struct_field_tag", tcc_declaration, 0) | |
367 | DEFTREECODE (NAME_MEMORY_TAG, "name_memory_tag", tcc_declaration, 0) | |
eff665b7 | 368 | DEFTREECODE (SYMBOL_MEMORY_TAG, "symbol_memory_tag", tcc_declaration, 0) |
4fb5e5ca | 369 | DEFTREECODE (MEMORY_PARTITION_TAG, "memory_partition_tag", tcc_declaration, 0) |
437f5d6b | 370 | |
7c43cc0e | 371 | /* A namespace declaration. Namespaces appear in DECL_CONTEXT of other |
372 | _DECLs, providing a hierarchy of names. */ | |
ce45a448 | 373 | DEFTREECODE (NAMESPACE_DECL, "namespace_decl", tcc_declaration, 0) |
40109983 | 374 | |
375 | /* A translation unit. This is not technically a declaration, since it | |
376 | can't be looked up, but it's close enough. */ | |
ce45a448 | 377 | DEFTREECODE (TRANSLATION_UNIT_DECL, "translation_unit_decl",\ |
378 | tcc_declaration, 0) | |
247258b6 | 379 | \f |
380 | /* References to storage. */ | |
381 | ||
382 | /* Value is structure or union component. | |
6374121b | 383 | Operand 0 is the structure or union (an expression). |
384 | Operand 1 is the field (a node of type FIELD_DECL). | |
385 | Operand 2, if present, is the value of DECL_FIELD_OFFSET, measured | |
386 | in units of DECL_OFFSET_ALIGN / BITS_PER_UNIT. */ | |
ce45a448 | 387 | DEFTREECODE (COMPONENT_REF, "component_ref", tcc_reference, 3) |
247258b6 | 388 | |
389 | /* Reference to a group of bits within an object. Similar to COMPONENT_REF | |
390 | except the position is given explicitly rather than via a FIELD_DECL. | |
391 | Operand 0 is the structure or union expression; | |
392 | operand 1 is a tree giving the number of bits being referenced; | |
393 | operand 2 is a tree giving the position of the first referenced bit. | |
394 | The field can be either a signed or unsigned field; | |
86ae60fd | 395 | BIT_FIELD_REF_UNSIGNED says which. */ |
ce45a448 | 396 | DEFTREECODE (BIT_FIELD_REF, "bit_field_ref", tcc_reference, 3) |
b27ac6b5 | 397 | |
9843a47d | 398 | /* The ordering of the following codes is optimized for the checking |
399 | macros in tree.h. Changing the order will degrade the speed of the | |
400 | compiler. INDIRECT_REF, ALIGN_INDIRECT_REF, MISALIGNED_INDIRECT_REF. */ | |
401 | ||
247258b6 | 402 | /* C unary `*' or Pascal `^'. One operand, an expression for a pointer. */ |
ce45a448 | 403 | DEFTREECODE (INDIRECT_REF, "indirect_ref", tcc_reference, 1) |
247258b6 | 404 | |
b056d812 | 405 | /* Like above, but aligns the referenced address (i.e, if the address |
406 | in P is not aligned on TYPE_ALIGN boundary, then &(*P) != P). */ | |
407 | DEFTREECODE (ALIGN_INDIRECT_REF, "align_indirect_ref", tcc_reference, 1) | |
408 | ||
409 | /* Same as INDIRECT_REF, but also specifies the alignment of the referenced | |
410 | address: | |
411 | Operand 0 is the referenced address (a pointer); | |
412 | Operand 1 is an INTEGER_CST which represents the alignment of the address, | |
413 | or 0 if the alignment is unknown. */ | |
414 | DEFTREECODE (MISALIGNED_INDIRECT_REF, "misaligned_indirect_ref", tcc_reference, 2) | |
415 | ||
ba04d9d5 | 416 | /* Array indexing. |
6374121b | 417 | Operand 0 is the array; operand 1 is a (single) array index. |
418 | Operand 2, if present, is a copy of TYPE_MIN_VALUE of the index. | |
419 | Operand 3, if present, is the element size, measured in units of | |
420 | the alignment of the element type. */ | |
ce45a448 | 421 | DEFTREECODE (ARRAY_REF, "array_ref", tcc_reference, 4) |
247258b6 | 422 | |
1f9f91ee | 423 | /* Likewise, except that the result is a range ("slice") of the array. The |
424 | starting index of the resulting array is taken from operand 1 and the size | |
425 | of the range is taken from the type of the expression. */ | |
ce45a448 | 426 | DEFTREECODE (ARRAY_RANGE_REF, "array_range_ref", tcc_reference, 4) |
ba04d9d5 | 427 | |
215e2f1d | 428 | /* Used to represent lookup of runtime type dependent data. Often this is |
429 | a reference to a vtable, but it needn't be. Operands are: | |
430 | OBJ_TYPE_REF_EXPR: An expression that evaluates the value to use. | |
431 | OBJ_TYPE_REF_OBJECT: Is the object on whose behalf the lookup is | |
432 | being performed. Through this the optimizers may be able to statically | |
433 | determine the dynamic type of the object. | |
434 | OBJ_TYPE_REF_TOKEN: Something front-end specific used to resolve the | |
435 | reference to something simpler, usually to the address of a DECL. | |
436 | Never touched by the middle-end. Good choices would be either an | |
437 | identifier or a vtable index. */ | |
ce45a448 | 438 | DEFTREECODE (OBJ_TYPE_REF, "obj_type_ref", tcc_expression, 3) |
cef0c6a0 | 439 | |
4ee9c684 | 440 | /* The exception object from the runtime. */ |
ce45a448 | 441 | DEFTREECODE (EXC_PTR_EXPR, "exc_ptr_expr", tcc_expression, 0) |
4ee9c684 | 442 | |
443 | /* The filter object from the runtime. */ | |
ce45a448 | 444 | DEFTREECODE (FILTER_EXPR, "filter_expr", tcc_expression, 0) |
4ee9c684 | 445 | |
247258b6 | 446 | /* Constructor: return an aggregate value made from specified components. |
447 | In C, this is used only for structure and array initializers. | |
c75b4594 | 448 | The operand is a sequence of component values made out of a VEC of |
449 | struct constructor_elt. | |
36e4740a | 450 | |
451 | For ARRAY_TYPE: | |
c75b4594 | 452 | The field INDEX of each constructor_elt is the corresponding index. |
453 | If the index is a RANGE_EXPR, it is a short-hand for many nodes, | |
454 | one for each index in the range. (If the corresponding field VALUE | |
36e4740a | 455 | has side-effects, they are evaluated once for each element. Wrap the |
456 | value in a SAVE_EXPR if you want to evaluate side effects only once.) | |
457 | ||
458 | For RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE: | |
c75b4594 | 459 | The field INDEX of each node is a FIELD_DECL. */ |
460 | DEFTREECODE (CONSTRUCTOR, "constructor", tcc_exceptional, 0) | |
247258b6 | 461 | |
4f433862 | 462 | /* The expression types are mostly straightforward, with the fourth argument |
463 | of DEFTREECODE saying how many operands there are. | |
464 | Unless otherwise specified, the operands are expressions and the | |
465 | types of all the operands and the expression must all be the same. */ | |
247258b6 | 466 | |
467 | /* Contains two expressions to compute, one followed by the other. | |
4f433862 | 468 | the first value is ignored. The second one's value is used. The |
469 | type of the first expression need not agree with the other types. */ | |
ce45a448 | 470 | DEFTREECODE (COMPOUND_EXPR, "compound_expr", tcc_expression, 2) |
247258b6 | 471 | |
472 | /* Assignment expression. Operand 0 is the what to set; 1, the new value. */ | |
ce45a448 | 473 | DEFTREECODE (MODIFY_EXPR, "modify_expr", tcc_expression, 2) |
247258b6 | 474 | |
475 | /* Initialization expression. Operand 0 is the variable to initialize; | |
cf6b103e | 476 | Operand 1 is the initializer. This differs from MODIFY_EXPR in that any |
477 | reference to the referent of operand 0 within operand 1 is undefined. */ | |
ce45a448 | 478 | DEFTREECODE (INIT_EXPR, "init_expr", tcc_expression, 2) |
247258b6 | 479 | |
480 | /* For TARGET_EXPR, operand 0 is the target of an initialization, | |
bbdcc797 | 481 | operand 1 is the initializer for the target, which may be void |
c2993438 | 482 | if simply expanding it initializes the target. |
bbdcc797 | 483 | operand 2 is the cleanup for this node, if any. |
484 | operand 3 is the saved initializer after this node has been | |
485 | expanded once; this is so we can re-expand the tree later. */ | |
ce45a448 | 486 | DEFTREECODE (TARGET_EXPR, "target_expr", tcc_expression, 4) |
247258b6 | 487 | |
488 | /* Conditional expression ( ... ? ... : ... in C). | |
489 | Operand 0 is the condition. | |
490 | Operand 1 is the then-value. | |
4f433862 | 491 | Operand 2 is the else-value. |
47cbd05d | 492 | Operand 0 may be of any type. |
493 | Operand 1 must have the same type as the entire expression, unless | |
494 | it unconditionally throws an exception, in which case it should | |
79307120 | 495 | have VOID_TYPE. The same constraints apply to operand 2. The |
496 | condition in operand 0 must be of integral type. */ | |
ce45a448 | 497 | DEFTREECODE (COND_EXPR, "cond_expr", tcc_expression, 3) |
247258b6 | 498 | |
0975351b | 499 | /* Vector conditional expression. It is like COND_EXPR, but with |
bd2ec699 | 500 | vector operands. |
501 | ||
502 | A = VEC_COND_EXPR ( X < Y, B, C) | |
503 | ||
504 | means | |
505 | ||
506 | for (i=0; i<N; i++) | |
507 | A[i] = X[i] < Y[i] ? B[i] : C[i]; | |
508 | */ | |
f10de62a | 509 | DEFTREECODE (VEC_COND_EXPR, "vec_cond_expr", tcc_expression, 3) |
bd2ec699 | 510 | |
247258b6 | 511 | /* Declare local variables, including making RTL and allocating space. |
4ee9c684 | 512 | BIND_EXPR_VARS is a chain of VAR_DECL nodes for the variables. |
b27ac6b5 | 513 | BIND_EXPR_BODY is the body, the expression to be computed using |
247258b6 | 514 | the variables. The value of operand 1 becomes that of the BIND_EXPR. |
4ee9c684 | 515 | BIND_EXPR_BLOCK is the BLOCK that corresponds to these bindings |
247258b6 | 516 | for debugging purposes. If this BIND_EXPR is actually expanded, |
517 | that sets the TREE_USED flag in the BLOCK. | |
518 | ||
519 | The BIND_EXPR is not responsible for informing parsers | |
520 | about these variables. If the body is coming from the input file, | |
b27ac6b5 | 521 | then the code that creates the BIND_EXPR is also responsible for |
247258b6 | 522 | informing the parser of the variables. |
523 | ||
524 | If the BIND_EXPR is ever expanded, its TREE_USED flag is set. | |
525 | This tells the code for debugging symbol tables not to ignore the BIND_EXPR. | |
b27ac6b5 | 526 | If the BIND_EXPR should be output for debugging but will not be expanded, |
247258b6 | 527 | set the TREE_USED flag by hand. |
528 | ||
529 | In order for the BIND_EXPR to be known at all, the code that creates it | |
530 | must also install it as a subblock in the tree of BLOCK | |
531 | nodes for the function. */ | |
ce45a448 | 532 | DEFTREECODE (BIND_EXPR, "bind_expr", tcc_expression, 3) |
247258b6 | 533 | |
c2f47e15 | 534 | /* Function call. CALL_EXPRs are represented by variably-sized expression |
535 | nodes. There are at least three fixed operands. Operand 0 is an | |
536 | INTEGER_CST node containing the total operand count, the number of | |
537 | arguments plus 3. Operand 1 is the function, while operand 2 is | |
538 | is static chain argument, or NULL. The remaining operands are the | |
539 | arguments to the call. */ | |
540 | DEFTREECODE (CALL_EXPR, "call_expr", tcc_vl_exp, 3) | |
247258b6 | 541 | |
247258b6 | 542 | /* Specify a value to compute along with its corresponding cleanup. |
6388f9f7 | 543 | Operand 0 is the cleanup expression. |
544 | The cleanup is executed by the first enclosing CLEANUP_POINT_EXPR, | |
545 | which must exist. This differs from TRY_CATCH_EXPR in that operand 1 | |
546 | is always evaluated when cleanups are run. */ | |
ce45a448 | 547 | DEFTREECODE (WITH_CLEANUP_EXPR, "with_cleanup_expr", tcc_expression, 1) |
34e2ddcd | 548 | |
549 | /* Specify a cleanup point. | |
838e0db2 | 550 | Operand 0 is an expression that may have cleanups. If it does, those |
551 | cleanups are executed after the expression is expanded. | |
552 | ||
553 | Note that if the expression is a reference to storage, it is forced out | |
554 | of memory before the cleanups are run. This is necessary to handle | |
555 | cases where the cleanups modify the storage referenced; in the | |
556 | expression 't.i', if 't' is a struct with an integer member 'i' and a | |
557 | cleanup which modifies 'i', the value of the expression depends on | |
558 | whether the cleanup is run before or after 't.i' is evaluated. When | |
559 | expand_expr is run on 't.i', it returns a MEM. This is not good enough; | |
560 | the value of 't.i' must be forced out of memory. | |
561 | ||
562 | As a consequence, the operand of a CLEANUP_POINT_EXPR must not have | |
563 | BLKmode, because it will not be forced out of memory. */ | |
ce45a448 | 564 | DEFTREECODE (CLEANUP_POINT_EXPR, "cleanup_point_expr", tcc_expression, 1) |
247258b6 | 565 | |
fd9ca534 | 566 | /* The following two codes are used in languages that have types where |
490fa27b | 567 | some field in an object of the type contains a value that is used in |
568 | the computation of another field's offset or size and/or the size of | |
569 | the type. The positions and/or sizes of fields can vary from object | |
7cc215d6 | 570 | to object of the same type or even for one and the same object within |
571 | its scope. | |
490fa27b | 572 | |
573 | Record types with discriminants in Ada or schema types in Pascal are | |
574 | examples of such types. This mechanism is also used to create "fat | |
575 | pointers" for unconstrained array types in Ada; the fat pointer is a | |
576 | structure one of whose fields is a pointer to the actual array type | |
577 | and the other field is a pointer to a template, which is a structure | |
578 | containing the bounds of the array. The bounds in the type pointed | |
579 | to by the first field in the fat pointer refer to the values in the | |
580 | template. | |
581 | ||
582 | When you wish to construct such a type you need "self-references" | |
583 | that allow you to reference the object having this type from the | |
584 | TYPE node, i.e. without having a variable instantiating this type. | |
585 | ||
586 | Such a "self-references" is done using a PLACEHOLDER_EXPR. This is | |
587 | a node that will later be replaced with the object being referenced. | |
588 | Its type is that of the object and selects which object to use from | |
589 | a chain of references (see below). No other slots are used in the | |
590 | PLACEHOLDER_EXPR. | |
591 | ||
592 | For example, if your type FOO is a RECORD_TYPE with a field BAR, | |
593 | and you need the value of <variable>.BAR to calculate TYPE_SIZE | |
594 | (FOO), just substitute <variable> above with a PLACEHOLDER_EXPR | |
7cc215d6 | 595 | whose TREE_TYPE is FOO. Then construct your COMPONENT_REF with |
596 | the PLACEHOLDER_EXPR as the first operand (which has the correct | |
597 | type). Later, when the size is needed in the program, the back-end | |
598 | will find this PLACEHOLDER_EXPR and generate code to calculate the | |
599 | actual size at run-time. In the following, we describe how this | |
600 | calculation is done. | |
601 | ||
55f9d7dc | 602 | When we wish to evaluate a size or offset, we check whether it contains a |
603 | PLACEHOLDER_EXPR. If it does, we call substitute_placeholder_in_expr | |
604 | passing both that tree and an expression within which the object may be | |
605 | found. The latter expression is the object itself in the simple case of | |
606 | an Ada record with discriminant, but it can be the array in the case of an | |
607 | unconstrained array. | |
490fa27b | 608 | |
609 | In the latter case, we need the fat pointer, because the bounds of | |
610 | the array can only be accessed from it. However, we rely here on the | |
611 | fact that the expression for the array contains the dereference of | |
55f9d7dc | 612 | the fat pointer that obtained the array pointer. */ |
fd9ca534 | 613 | |
af6ed417 | 614 | /* Denotes a record to later be substituted before evaluating this expression. |
55f9d7dc | 615 | The type of this expression is used to find the record to replace it. */ |
ce45a448 | 616 | DEFTREECODE (PLACEHOLDER_EXPR, "placeholder_expr", tcc_exceptional, 0) |
fd9ca534 | 617 | |
4f433862 | 618 | /* Simple arithmetic. */ |
ce45a448 | 619 | DEFTREECODE (PLUS_EXPR, "plus_expr", tcc_binary, 2) |
620 | DEFTREECODE (MINUS_EXPR, "minus_expr", tcc_binary, 2) | |
621 | DEFTREECODE (MULT_EXPR, "mult_expr", tcc_binary, 2) | |
247258b6 | 622 | |
0de36bdb | 623 | /* Pointer addition. The first operand is always a pointer and the |
624 | second operand is an integer of type sizetype. */ | |
625 | DEFTREECODE (POINTER_PLUS_EXPR, "pointer_plus_expr", tcc_binary, 2) | |
626 | ||
247258b6 | 627 | /* Division for integer result that rounds the quotient toward zero. */ |
ce45a448 | 628 | DEFTREECODE (TRUNC_DIV_EXPR, "trunc_div_expr", tcc_binary, 2) |
247258b6 | 629 | |
630 | /* Division for integer result that rounds the quotient toward infinity. */ | |
ce45a448 | 631 | DEFTREECODE (CEIL_DIV_EXPR, "ceil_div_expr", tcc_binary, 2) |
247258b6 | 632 | |
633 | /* Division for integer result that rounds toward minus infinity. */ | |
ce45a448 | 634 | DEFTREECODE (FLOOR_DIV_EXPR, "floor_div_expr", tcc_binary, 2) |
247258b6 | 635 | |
636 | /* Division for integer result that rounds toward nearest integer. */ | |
ce45a448 | 637 | DEFTREECODE (ROUND_DIV_EXPR, "round_div_expr", tcc_binary, 2) |
247258b6 | 638 | |
639 | /* Four kinds of remainder that go with the four kinds of division. */ | |
ce45a448 | 640 | DEFTREECODE (TRUNC_MOD_EXPR, "trunc_mod_expr", tcc_binary, 2) |
641 | DEFTREECODE (CEIL_MOD_EXPR, "ceil_mod_expr", tcc_binary, 2) | |
642 | DEFTREECODE (FLOOR_MOD_EXPR, "floor_mod_expr", tcc_binary, 2) | |
643 | DEFTREECODE (ROUND_MOD_EXPR, "round_mod_expr", tcc_binary, 2) | |
247258b6 | 644 | |
4f433862 | 645 | /* Division for real result. */ |
ce45a448 | 646 | DEFTREECODE (RDIV_EXPR, "rdiv_expr", tcc_binary, 2) |
247258b6 | 647 | |
648 | /* Division which is not supposed to need rounding. | |
649 | Used for pointer subtraction in C. */ | |
ce45a448 | 650 | DEFTREECODE (EXACT_DIV_EXPR, "exact_div_expr", tcc_binary, 2) |
247258b6 | 651 | |
8a1417cb | 652 | /* Conversion of real to fixed point by truncation. */ |
ce45a448 | 653 | DEFTREECODE (FIX_TRUNC_EXPR, "fix_trunc_expr", tcc_unary, 1) |
247258b6 | 654 | |
655 | /* Conversion of an integer to a real. */ | |
ce45a448 | 656 | DEFTREECODE (FLOAT_EXPR, "float_expr", tcc_unary, 1) |
247258b6 | 657 | |
4f433862 | 658 | /* Unary negation. */ |
ce45a448 | 659 | DEFTREECODE (NEGATE_EXPR, "negate_expr", tcc_unary, 1) |
247258b6 | 660 | |
10c2e6f6 | 661 | /* Minimum and maximum values. When used with floating point, if both |
662 | operands are zeros, or if either operand is NaN, then it is unspecified | |
663 | which of the two operands is returned as the result. */ | |
ce45a448 | 664 | DEFTREECODE (MIN_EXPR, "min_expr", tcc_binary, 2) |
665 | DEFTREECODE (MAX_EXPR, "max_expr", tcc_binary, 2) | |
43dd9cb8 | 666 | |
667 | /* Represents the absolute value of the operand. | |
668 | ||
669 | An ABS_EXPR must have either an INTEGER_TYPE or a REAL_TYPE. The | |
670 | operand of the ABS_EXPR must have the same type. */ | |
ce45a448 | 671 | DEFTREECODE (ABS_EXPR, "abs_expr", tcc_unary, 1) |
43dd9cb8 | 672 | |
247258b6 | 673 | /* Shift operations for shift and rotate. |
71eb0ada | 674 | Shift means logical shift if done on an |
675 | unsigned type, arithmetic shift if done on a signed type. | |
247258b6 | 676 | The second operand is the number of bits to |
abc061c5 | 677 | shift by; it need not be the same type as the first operand and result. |
678 | Note that the result is undefined if the second operand is larger | |
1b13bf2f | 679 | than or equal to the first operand's type size. */ |
ce45a448 | 680 | DEFTREECODE (LSHIFT_EXPR, "lshift_expr", tcc_binary, 2) |
681 | DEFTREECODE (RSHIFT_EXPR, "rshift_expr", tcc_binary, 2) | |
682 | DEFTREECODE (LROTATE_EXPR, "lrotate_expr", tcc_binary, 2) | |
683 | DEFTREECODE (RROTATE_EXPR, "rrotate_expr", tcc_binary, 2) | |
247258b6 | 684 | |
685 | /* Bitwise operations. Operands have same mode as result. */ | |
ce45a448 | 686 | DEFTREECODE (BIT_IOR_EXPR, "bit_ior_expr", tcc_binary, 2) |
687 | DEFTREECODE (BIT_XOR_EXPR, "bit_xor_expr", tcc_binary, 2) | |
688 | DEFTREECODE (BIT_AND_EXPR, "bit_and_expr", tcc_binary, 2) | |
689 | DEFTREECODE (BIT_NOT_EXPR, "bit_not_expr", tcc_unary, 1) | |
247258b6 | 690 | |
4593f391 | 691 | /* ANDIF and ORIF allow the second operand not to be computed if the |
692 | value of the expression is determined from the first operand. AND, | |
693 | OR, and XOR always compute the second operand whether its value is | |
694 | needed or not (for side effects). The operand may have | |
695 | BOOLEAN_TYPE or INTEGER_TYPE. In either case, the argument will be | |
696 | either zero or one. For example, a TRUTH_NOT_EXPR will never have | |
428d04ec | 697 | an INTEGER_TYPE VAR_DECL as its argument; instead, a NE_EXPR will be |
4593f391 | 698 | used to compare the VAR_DECL to zero, thereby obtaining a node with |
699 | value zero or one. */ | |
ce45a448 | 700 | DEFTREECODE (TRUTH_ANDIF_EXPR, "truth_andif_expr", tcc_expression, 2) |
701 | DEFTREECODE (TRUTH_ORIF_EXPR, "truth_orif_expr", tcc_expression, 2) | |
702 | DEFTREECODE (TRUTH_AND_EXPR, "truth_and_expr", tcc_expression, 2) | |
703 | DEFTREECODE (TRUTH_OR_EXPR, "truth_or_expr", tcc_expression, 2) | |
704 | DEFTREECODE (TRUTH_XOR_EXPR, "truth_xor_expr", tcc_expression, 2) | |
705 | DEFTREECODE (TRUTH_NOT_EXPR, "truth_not_expr", tcc_expression, 1) | |
247258b6 | 706 | |
707 | /* Relational operators. | |
708 | `EQ_EXPR' and `NE_EXPR' are allowed for any types. | |
709 | The others are allowed only for integer (or pointer or enumeral) | |
710 | or real types. | |
711 | In all cases the operands will have the same type, | |
712 | and the value is always the type used by the language for booleans. */ | |
ce45a448 | 713 | DEFTREECODE (LT_EXPR, "lt_expr", tcc_comparison, 2) |
714 | DEFTREECODE (LE_EXPR, "le_expr", tcc_comparison, 2) | |
715 | DEFTREECODE (GT_EXPR, "gt_expr", tcc_comparison, 2) | |
716 | DEFTREECODE (GE_EXPR, "ge_expr", tcc_comparison, 2) | |
717 | DEFTREECODE (EQ_EXPR, "eq_expr", tcc_comparison, 2) | |
718 | DEFTREECODE (NE_EXPR, "ne_expr", tcc_comparison, 2) | |
247258b6 | 719 | |
a4110d9a | 720 | /* Additional relational operators for floating point unordered. */ |
ce45a448 | 721 | DEFTREECODE (UNORDERED_EXPR, "unordered_expr", tcc_comparison, 2) |
722 | DEFTREECODE (ORDERED_EXPR, "ordered_expr", tcc_comparison, 2) | |
a4110d9a | 723 | |
9cb8e99f | 724 | /* These are equivalent to unordered or ... */ |
ce45a448 | 725 | DEFTREECODE (UNLT_EXPR, "unlt_expr", tcc_comparison, 2) |
726 | DEFTREECODE (UNLE_EXPR, "unle_expr", tcc_comparison, 2) | |
727 | DEFTREECODE (UNGT_EXPR, "ungt_expr", tcc_comparison, 2) | |
728 | DEFTREECODE (UNGE_EXPR, "unge_expr", tcc_comparison, 2) | |
729 | DEFTREECODE (UNEQ_EXPR, "uneq_expr", tcc_comparison, 2) | |
a4110d9a | 730 | |
318a728f | 731 | /* This is the reverse of uneq_expr. */ |
ce45a448 | 732 | DEFTREECODE (LTGT_EXPR, "ltgt_expr", tcc_comparison, 2) |
318a728f | 733 | |
ce45a448 | 734 | DEFTREECODE (RANGE_EXPR, "range_expr", tcc_binary, 2) |
247258b6 | 735 | |
736 | /* Represents a conversion of type of a value. | |
737 | All conversions, including implicit ones, must be | |
4f433862 | 738 | represented by CONVERT_EXPR or NOP_EXPR nodes. */ |
ce45a448 | 739 | DEFTREECODE (CONVERT_EXPR, "convert_expr", tcc_unary, 1) |
247258b6 | 740 | |
06f0b99c | 741 | /* Conversion of a fixed-point value to an integer, a real, or a fixed-point |
742 | value. Or conversion of a fixed-point value from an integer, a real, or | |
743 | a fixed-point value. */ | |
744 | DEFTREECODE (FIXED_CONVERT_EXPR, "fixed_convert_expr", tcc_unary, 1) | |
745 | ||
247258b6 | 746 | /* Represents a conversion expected to require no code to be generated. */ |
ce45a448 | 747 | DEFTREECODE (NOP_EXPR, "nop_expr", tcc_unary, 1) |
247258b6 | 748 | |
749 | /* Value is same as argument, but guaranteed not an lvalue. */ | |
ce45a448 | 750 | DEFTREECODE (NON_LVALUE_EXPR, "non_lvalue_expr", tcc_unary, 1) |
247258b6 | 751 | |
f96c43fb | 752 | /* Represents viewing something of one type as being of a second type. |
753 | This corresponds to an "Unchecked Conversion" in Ada and roughly to | |
754 | the idiom *(type2 *)&X in C. The only operand is the value to be | |
755 | viewed as being of another type. It is undefined if the type of the | |
e58d0f17 | 756 | input and of the expression have different sizes. |
757 | ||
758 | This code may also be used within the LHS of a MODIFY_EXPR, in which | |
759 | case no actual data motion may occur. TREE_ADDRESSABLE will be set in | |
760 | this case and GCC must abort if it could not do the operation without | |
761 | generating insns. */ | |
ce45a448 | 762 | DEFTREECODE (VIEW_CONVERT_EXPR, "view_convert_expr", tcc_reference, 1) |
f96c43fb | 763 | |
247258b6 | 764 | /* Represents something we computed once and will use multiple times. |
67c155cb | 765 | First operand is that expression. After it is evaluated once, it |
766 | will be replaced by the temporary variable that holds the value. */ | |
ce45a448 | 767 | DEFTREECODE (SAVE_EXPR, "save_expr", tcc_expression, 1) |
247258b6 | 768 | |
247258b6 | 769 | /* & in C. Value is the address at which the operand's value resides. |
770 | Operand may have any mode. Result mode is Pmode. */ | |
ce45a448 | 771 | DEFTREECODE (ADDR_EXPR, "addr_expr", tcc_expression, 1) |
247258b6 | 772 | |
b27ac6b5 | 773 | /* Operand0 is a function constant; result is part N of a function |
6bfa2cc1 | 774 | descriptor of type ptr_mode. */ |
ce45a448 | 775 | DEFTREECODE (FDESC_EXPR, "fdesc_expr", tcc_expression, 2) |
6bfa2cc1 | 776 | |
247258b6 | 777 | /* Given two real or integer operands of the same type, |
778 | returns a complex value of the corresponding complex type. */ | |
ce45a448 | 779 | DEFTREECODE (COMPLEX_EXPR, "complex_expr", tcc_binary, 2) |
247258b6 | 780 | |
4f433862 | 781 | /* Complex conjugate of operand. Used only on complex types. */ |
ce45a448 | 782 | DEFTREECODE (CONJ_EXPR, "conj_expr", tcc_unary, 1) |
247258b6 | 783 | |
784 | /* Used only on an operand of complex type, these return | |
785 | a value of the corresponding component type. */ | |
ce45a448 | 786 | DEFTREECODE (REALPART_EXPR, "realpart_expr", tcc_reference, 1) |
787 | DEFTREECODE (IMAGPART_EXPR, "imagpart_expr", tcc_reference, 1) | |
247258b6 | 788 | |
789 | /* Nodes for ++ and -- in C. | |
790 | The second arg is how much to increment or decrement by. | |
791 | For a pointer, it would be the size of the object pointed to. */ | |
ce45a448 | 792 | DEFTREECODE (PREDECREMENT_EXPR, "predecrement_expr", tcc_expression, 2) |
793 | DEFTREECODE (PREINCREMENT_EXPR, "preincrement_expr", tcc_expression, 2) | |
794 | DEFTREECODE (POSTDECREMENT_EXPR, "postdecrement_expr", tcc_expression, 2) | |
795 | DEFTREECODE (POSTINCREMENT_EXPR, "postincrement_expr", tcc_expression, 2) | |
694ec519 | 796 | |
a66c9326 | 797 | /* Used to implement `va_arg'. */ |
ce45a448 | 798 | DEFTREECODE (VA_ARG_EXPR, "va_arg_expr", tcc_expression, 1) |
a66c9326 | 799 | |
ad87de1e | 800 | /* Evaluate operand 1. If and only if an exception is thrown during |
694ec519 | 801 | the evaluation of operand 1, evaluate operand 2. |
802 | ||
4ee9c684 | 803 | This differs from TRY_FINALLY_EXPR in that operand 2 is not evaluated |
804 | on a normal or jump exit, only on an exception. */ | |
ce45a448 | 805 | DEFTREECODE (TRY_CATCH_EXPR, "try_catch_expr", tcc_statement, 2) |
694ec519 | 806 | |
ca8c4cda | 807 | /* Evaluate the first operand. |
428d04ec | 808 | The second operand is a cleanup expression which is evaluated |
5983a5c7 | 809 | on any exit (normal, exception, or jump out) from this expression. */ |
ce45a448 | 810 | DEFTREECODE (TRY_FINALLY_EXPR, "try_finally", tcc_statement, 2) |
247258b6 | 811 | \f |
812 | /* These types of expressions have no useful value, | |
813 | and always have side effects. */ | |
814 | ||
7dd37241 | 815 | /* Used to represent a local declaration. The operand is DECL_EXPR_DECL. */ |
ce45a448 | 816 | DEFTREECODE (DECL_EXPR, "decl_expr", tcc_statement, 1) |
7dd37241 | 817 | |
247258b6 | 818 | /* A label definition, encapsulated as a statement. |
819 | Operand 0 is the LABEL_DECL node for the label that appears here. | |
820 | The type should be void and the value should be ignored. */ | |
ce45a448 | 821 | DEFTREECODE (LABEL_EXPR, "label_expr", tcc_statement, 1) |
247258b6 | 822 | |
c19f64ba | 823 | /* GOTO. Operand 0 is a LABEL_DECL node or an expression. |
247258b6 | 824 | The type should be void and the value should be ignored. */ |
ce45a448 | 825 | DEFTREECODE (GOTO_EXPR, "goto_expr", tcc_statement, 1) |
247258b6 | 826 | |
827 | /* RETURN. Evaluates operand 0, then returns from the current function. | |
828 | Presumably that operand is an assignment that stores into the | |
829 | RESULT_DECL that hold the value to be returned. | |
830 | The operand may be null. | |
831 | The type should be void and the value should be ignored. */ | |
ce45a448 | 832 | DEFTREECODE (RETURN_EXPR, "return_expr", tcc_statement, 1) |
247258b6 | 833 | |
834 | /* Exit the inner most loop conditionally. Operand 0 is the condition. | |
835 | The type should be void and the value should be ignored. */ | |
ce45a448 | 836 | DEFTREECODE (EXIT_EXPR, "exit_expr", tcc_statement, 1) |
247258b6 | 837 | |
838 | /* A loop. Operand 0 is the body of the loop. | |
839 | It must contain an EXIT_EXPR or is an infinite loop. | |
840 | The type should be void and the value should be ignored. */ | |
ce45a448 | 841 | DEFTREECODE (LOOP_EXPR, "loop_expr", tcc_statement, 1) |
247258b6 | 842 | |
18836fe9 | 843 | /* Switch expression. |
df4b504c | 844 | |
4ee9c684 | 845 | TREE_TYPE is the original type of the condition, before any |
846 | language required type conversions. It may be NULL, in which case | |
847 | the original type and final types are assumed to be the same. | |
848 | ||
849 | Operand 0 is the expression used to perform the branch, | |
850 | Operand 1 is the body of the switch, which probably contains | |
851 | CASE_LABEL_EXPRs. It may also be NULL, in which case operand 2 | |
852 | must not be NULL. | |
853 | Operand 2 is either NULL_TREE or a TREE_VEC of the CASE_LABEL_EXPRs | |
854 | of all the cases. */ | |
ce45a448 | 855 | DEFTREECODE (SWITCH_EXPR, "switch_expr", tcc_statement, 3) |
4ee9c684 | 856 | |
857 | /* Used to represent a case label. The operands are CASE_LOW and | |
858 | CASE_HIGH, respectively. If CASE_LOW is NULL_TREE, the label is a | |
859 | 'default' label. If CASE_HIGH is NULL_TREE, the label is a normal case | |
860 | label. CASE_LABEL is the corresponding LABEL_DECL. */ | |
ce45a448 | 861 | DEFTREECODE (CASE_LABEL_EXPR, "case_label_expr", tcc_statement, 3) |
4ee9c684 | 862 | |
b27ac6b5 | 863 | /* RESX. Resume execution after an exception. Operand 0 is a |
4ee9c684 | 864 | number indicating the exception region that is being left. */ |
ce45a448 | 865 | DEFTREECODE (RESX_EXPR, "resx_expr", tcc_statement, 1) |
4ee9c684 | 866 | |
867 | /* Used to represent an inline assembly statement. ASM_STRING returns a | |
868 | STRING_CST for the instruction (e.g., "mov x, y"). ASM_OUTPUTS, | |
869 | ASM_INPUTS, and ASM_CLOBBERS represent the outputs, inputs, and clobbers | |
870 | for the statement. */ | |
ce45a448 | 871 | DEFTREECODE (ASM_EXPR, "asm_expr", tcc_statement, 4) |
4ee9c684 | 872 | |
873 | /* Variable references for SSA analysis. New SSA names are created every | |
874 | time a variable is assigned a new value. The SSA builder uses SSA_NAME | |
875 | nodes to implement SSA versioning. */ | |
ce45a448 | 876 | DEFTREECODE (SSA_NAME, "ssa_name", tcc_exceptional, 0) |
4ee9c684 | 877 | |
4ee9c684 | 878 | /* SSA PHI operator. PHI_RESULT is the new SSA_NAME node created by |
879 | the PHI node. PHI_ARG_LENGTH is the number of arguments. | |
880 | PHI_ARG_ELT returns the Ith tuple <ssa_name, edge> from the | |
881 | argument list. Each tuple contains the incoming reaching | |
882 | definition (SSA_NAME node) and the edge via which that definition | |
f7f07c95 | 883 | is coming through. */ |
ce45a448 | 884 | DEFTREECODE (PHI_NODE, "phi_node", tcc_exceptional, 0) |
4ee9c684 | 885 | |
886 | /* Used to represent a typed exception handler. CATCH_TYPES is the type (or | |
887 | list of types) handled, and CATCH_BODY is the code for the handler. */ | |
ce45a448 | 888 | DEFTREECODE (CATCH_EXPR, "catch_expr", tcc_statement, 2) |
4ee9c684 | 889 | |
890 | /* Used to represent an exception specification. EH_FILTER_TYPES is a list | |
891 | of allowed types, and EH_FILTER_FAILURE is an expression to evaluate on | |
892 | failure. EH_FILTER_MUST_NOT_THROW controls which range type to use when | |
893 | expanding. */ | |
ce45a448 | 894 | DEFTREECODE (EH_FILTER_EXPR, "eh_filter_expr", tcc_statement, 2) |
4ee9c684 | 895 | |
66723563 | 896 | /* Indicates a change in the dynamic type of a memory location. This |
897 | has no value and generates no executable code. It is only used for | |
898 | type based alias analysis. This is generated by C++ placement new. | |
899 | CHANGE_DYNAMIC_TYPE_NEW_TYPE, the first operand, is the new type. | |
4a7e4fcc | 900 | CHANGE_DYNAMIC_TYPE_LOCATION, the second operand, is the location |
66723563 | 901 | whose type is being changed. */ |
902 | DEFTREECODE (CHANGE_DYNAMIC_TYPE_EXPR, "change_dynamic_type_expr", | |
903 | tcc_statement, 2) | |
904 | ||
1364018f | 905 | /* Node used for describing a property that is known at compile |
906 | time. */ | |
ce45a448 | 907 | DEFTREECODE (SCEV_KNOWN, "scev_known", tcc_expression, 0) |
1364018f | 908 | |
909 | /* Node used for describing a property that is not known at compile | |
910 | time. */ | |
ce45a448 | 911 | DEFTREECODE (SCEV_NOT_KNOWN, "scev_not_known", tcc_expression, 0) |
1364018f | 912 | |
913 | /* Polynomial chains of recurrences. | |
914 | Under the form: cr = {CHREC_LEFT (cr), +, CHREC_RIGHT (cr)}. */ | |
ce45a448 | 915 | DEFTREECODE (POLYNOMIAL_CHREC, "polynomial_chrec", tcc_expression, 3) |
1364018f | 916 | |
4ee9c684 | 917 | /* Used to chain children of container statements together. |
918 | Use the interface in tree-iterator.h to access this node. */ | |
ce45a448 | 919 | DEFTREECODE (STATEMENT_LIST, "statement_list", tcc_exceptional, 0) |
df4b504c | 920 | |
6354ec2d | 921 | /* Value handles. Artificial nodes to represent expressions in |
922 | partial redundancy elimination (tree-ssa-pre.c). These nodes are | |
923 | used for expression canonicalization. If two expressions compute | |
924 | the same value, they will be assigned the same value handle. */ | |
ce45a448 | 925 | DEFTREECODE (VALUE_HANDLE, "value_handle", tcc_exceptional, 0) |
6354ec2d | 926 | |
88dbf20f | 927 | /* Predicate assertion. Artificial expression generated by the optimizers |
928 | to keep track of predicate values. This expression may only appear on | |
929 | the RHS of assignments. | |
930 | ||
931 | Given X = ASSERT_EXPR <Y, EXPR>, the optimizers can infer | |
932 | two things: | |
933 | ||
934 | 1- X is a copy of Y. | |
935 | 2- EXPR is a GIMPLE conditional expression (as defined by | |
936 | is_gimple_condexpr) and is known to be true. | |
937 | ||
938 | The type of the expression is the same as Y. */ | |
939 | DEFTREECODE (ASSERT_EXPR, "assert_expr", tcc_expression, 2) | |
940 | ||
3cb98335 | 941 | /* Base class information. Holds information about a class as a |
942 | baseclass of itself or another class. */ | |
ce45a448 | 943 | DEFTREECODE (TREE_BINFO, "tree_binfo", tcc_exceptional, 0) |
3cb98335 | 944 | |
80f06481 | 945 | /* Records the size for an expression of variable size type. This is |
946 | for use in contexts in which we are accessing the entire object, | |
947 | such as for a function call, or block copy. | |
948 | Operand 0 is the real expression. | |
949 | Operand 1 is the size of the type in the expression. */ | |
ce45a448 | 950 | DEFTREECODE (WITH_SIZE_EXPR, "with_size_expr", tcc_expression, 2) |
80f06481 | 951 | |
b056d812 | 952 | /* Extract elements from two input vectors Operand 0 and Operand 1 |
953 | size VS, according to the offset OFF defined by Operand 2 as | |
954 | follows: | |
955 | If OFF > 0, the last VS - OFF elements of vector OP0 are concatenated to | |
956 | the first OFF elements of the vector OP1. | |
957 | If OFF == 0, then the returned vector is OP1. | |
958 | On different targets OFF may take different forms; It can be an address, in | |
959 | which case its low log2(VS)-1 bits define the offset, or it can be a mask | |
960 | generated by the builtin targetm.vectorize.mask_for_load_builtin_decl. */ | |
961 | DEFTREECODE (REALIGN_LOAD_EXPR, "realign_load", tcc_expression, 3) | |
962 | ||
aed164c3 | 963 | /* Low-level memory addressing. Operands are SYMBOL (static or global |
964 | variable), BASE (register), INDEX (register), STEP (integer constant), | |
965 | OFFSET (integer constant). Corresponding address is | |
966 | SYMBOL + BASE + STEP * INDEX + OFFSET. Only variations and values valid on | |
967 | the target are allowed. | |
33c25cf0 | 968 | |
969 | The type of STEP, INDEX and OFFSET is sizetype. The type of BASE is | |
970 | sizetype or a pointer type (if SYMBOL is NULL). | |
aed164c3 | 971 | |
972 | The sixth argument is the reference to the original memory access, which | |
973 | is preserved for the purposes of the RTL alias analysis. The seventh | |
974 | argument is a tag representing results of the tree level alias analysis. */ | |
975 | ||
976 | DEFTREECODE (TARGET_MEM_REF, "target_mem_ref", tcc_reference, 7) | |
977 | ||
1e8e9920 | 978 | /* The ordering of the codes between OMP_PARALLEL and OMP_CRITICAL is |
979 | exposed to TREE_RANGE_CHECK. */ | |
980 | /* OpenMP - #pragma omp parallel [clause1 ... clauseN] | |
981 | Operand 0: OMP_PARALLEL_BODY: Code to be executed by all threads. | |
773c5ba7 | 982 | Operand 1: OMP_PARALLEL_CLAUSES: List of clauses. |
983 | Operand 2: OMP_PARALLEL_FN: FUNCTION_DECL used when outlining the | |
984 | body of the parallel region. Only valid after | |
985 | pass_lower_omp. | |
986 | Operand 3: OMP_PARALLEL_DATA_ARG: Local variable in the parent | |
987 | function containing data to be shared with the child | |
988 | function. */ | |
989 | ||
990 | DEFTREECODE (OMP_PARALLEL, "omp_parallel", tcc_statement, 4) | |
1e8e9920 | 991 | |
992 | /* OpenMP - #pragma omp for [clause1 ... clauseN] | |
993 | Operand 0: OMP_FOR_BODY: Loop body. | |
994 | Operand 1: OMP_FOR_CLAUSES: List of clauses. | |
995 | Operand 2: OMP_FOR_INIT: Initialization code of the form | |
996 | VAR = N1. | |
997 | Operand 3: OMP_FOR_COND: Loop conditional expression of the form | |
998 | VAR { <, >, <=, >= } N2. | |
999 | Operand 4: OMP_FOR_INCR: Loop index increment of the form | |
1000 | VAR { +=, -= } INCR. | |
1001 | Operand 5: OMP_FOR_PRE_BODY: Filled by the gimplifier with things | |
1002 | from INIT, COND, and INCR that are technically part of the | |
1003 | OMP_FOR structured block, but are evaluated before the loop | |
1004 | body begins. | |
1005 | ||
1006 | VAR must be a signed integer variable, which is implicitly thread | |
1007 | private. N1, N2 and INCR are required to be loop invariant integer | |
1008 | expressions that are evaluated without any synchronization. | |
1009 | The evaluation order, frequency of evaluation and side-effects are | |
1010 | unspecified by the standard. */ | |
1011 | DEFTREECODE (OMP_FOR, "omp_for", tcc_statement, 6) | |
1012 | ||
1013 | /* OpenMP - #pragma omp sections [clause1 ... clauseN] | |
1014 | Operand 0: OMP_SECTIONS_BODY: Sections body. | |
ac6e3339 | 1015 | Operand 1: OMP_SECTIONS_CLAUSES: List of clauses. |
1016 | Operand 2: OMP_SECTIONS_CONTROL: The control variable used for deciding | |
1017 | which of the sections to execute. */ | |
1018 | DEFTREECODE (OMP_SECTIONS, "omp_sections", tcc_statement, 3) | |
1019 | ||
1020 | /* This tree immediatelly follows OMP_SECTIONS, and represents the switch | |
1021 | used to decide which branch is taken. */ | |
1022 | DEFTREECODE (OMP_SECTIONS_SWITCH, "omp_sections_switch", tcc_statement, 0) | |
1e8e9920 | 1023 | |
1024 | /* OpenMP - #pragma omp single | |
1025 | Operand 0: OMP_SINGLE_BODY: Single section body. | |
1026 | Operand 1: OMP_SINGLE_CLAUSES: List of clauses. */ | |
1027 | DEFTREECODE (OMP_SINGLE, "omp_single", tcc_statement, 2) | |
1028 | ||
1029 | /* OpenMP - #pragma omp section | |
1030 | Operand 0: OMP_SECTION_BODY: Section body. */ | |
1031 | DEFTREECODE (OMP_SECTION, "omp_section", tcc_statement, 1) | |
1032 | ||
1033 | /* OpenMP - #pragma omp master | |
1034 | Operand 0: OMP_MASTER_BODY: Master section body. */ | |
1035 | DEFTREECODE (OMP_MASTER, "omp_master", tcc_statement, 1) | |
1036 | ||
1037 | /* OpenMP - #pragma omp ordered | |
1038 | Operand 0: OMP_ORDERED_BODY: Master section body. */ | |
1039 | DEFTREECODE (OMP_ORDERED, "omp_ordered", tcc_statement, 1) | |
1040 | ||
1041 | /* OpenMP - #pragma omp critical [name] | |
1042 | Operand 0: OMP_CRITICAL_BODY: Critical section body. | |
1043 | Operand 1: OMP_CRITICAL_NAME: Identifier for critical section. */ | |
1044 | DEFTREECODE (OMP_CRITICAL, "omp_critical", tcc_statement, 2) | |
1045 | ||
61e47ac8 | 1046 | /* Return from an OpenMP directive. */ |
1047 | DEFTREECODE (OMP_RETURN, "omp_return", tcc_statement, 0) | |
1048 | ||
1049 | /* OpenMP - An intermediate tree code to mark the location of the | |
ac6e3339 | 1050 | loop or sections iteration in the partially lowered code. |
1051 | The arguments are definition and use of the control variable. */ | |
1052 | DEFTREECODE (OMP_CONTINUE, "omp_continue", tcc_statement, 2) | |
61e47ac8 | 1053 | |
1e8e9920 | 1054 | /* OpenMP - #pragma omp atomic |
1055 | Operand 0: The address at which the atomic operation is to be performed. | |
1056 | This address should be stabilized with save_expr. | |
1057 | Operand 1: The expression to evaluate. When the old value of the object | |
1058 | at the address is used in the expression, it should appear as if | |
1059 | build_fold_indirect_ref of the address. */ | |
1060 | DEFTREECODE (OMP_ATOMIC, "omp_atomic", tcc_statement, 2) | |
1061 | ||
55d6e7cd | 1062 | /* OpenMP clauses. */ |
1063 | DEFTREECODE (OMP_CLAUSE, "omp_clause", tcc_exceptional, 0) | |
1e8e9920 | 1064 | |
ea8f3370 | 1065 | /* Reduction operations. |
1066 | Operations that take a vector of elements and "reduce" it to a scalar | |
1067 | result (e.g. summing the elements of the vector, finding the minimum over | |
1068 | the vector elements, etc). | |
1069 | Operand 0 is a vector; the first element in the vector has the result. | |
1070 | Operand 1 is a vector. */ | |
1071 | DEFTREECODE (REDUC_MAX_EXPR, "reduc_max_expr", tcc_unary, 1) | |
1072 | DEFTREECODE (REDUC_MIN_EXPR, "reduc_min_expr", tcc_unary, 1) | |
1073 | DEFTREECODE (REDUC_PLUS_EXPR, "reduc_plus_expr", tcc_unary, 1) | |
1074 | ||
4a61a337 | 1075 | /* Widenning dot-product. |
1076 | The first two arguments are of type t1. | |
1077 | The third argument and the result are of type t2, such that t2 is at least | |
1078 | twice the size of t1. DOT_PROD_EXPR(arg1,arg2,arg3) is equivalent to: | |
1079 | tmp = WIDEN_MULT_EXPR(arg1, arg2); | |
1080 | arg3 = PLUS_EXPR (tmp, arg3); | |
1081 | or: | |
1082 | tmp = WIDEN_MULT_EXPR(arg1, arg2); | |
1083 | arg3 = WIDEN_SUM_EXPR (tmp, arg3); */ | |
1084 | DEFTREECODE (DOT_PROD_EXPR, "dot_prod_expr", tcc_expression, 3) | |
1085 | ||
1086 | /* Widenning summation. | |
1087 | The first argument is of type t1. | |
1088 | The second argument is of type t2, such that t2 is at least twice | |
1089 | the size of t1. The type of the entire expression is also t2. | |
1090 | WIDEN_SUM_EXPR is equivalent to first widening (promoting) | |
1091 | the first argument from type t1 to type t2, and then summing it | |
1092 | with the second argument. */ | |
1093 | DEFTREECODE (WIDEN_SUM_EXPR, "widen_sum_expr", tcc_binary, 2) | |
1094 | ||
1095 | /* Widenning multiplication. | |
1096 | The two arguments are of type t1. | |
1097 | The result is of type t2, such that t2 is at least twice | |
1098 | the size of t1. WIDEN_MULT_EXPR is equivalent to first widening (promoting) | |
1099 | the arguments from type t1 to type t2, and then multiplying them. */ | |
1100 | DEFTREECODE (WIDEN_MULT_EXPR, "widen_mult_expr", tcc_binary, 2) | |
1101 | ||
cc007395 | 1102 | /* Whole vector left/right shift in bits. |
925c62d4 | 1103 | Operand 0 is a vector to be shifted. |
1104 | Operand 1 is an integer shift amount in bits. */ | |
1105 | DEFTREECODE (VEC_LSHIFT_EXPR, "vec_lshift_expr", tcc_binary, 2) | |
1106 | DEFTREECODE (VEC_RSHIFT_EXPR, "vec_rshift_expr", tcc_binary, 2) | |
35cc02b5 | 1107 | \f |
1108 | /* GIMPLE tree codes. */ | |
1109 | ||
1110 | /* Assignment expression. Operand 0 is the what to set; 1, the new value. */ | |
1111 | DEFTREECODE (GIMPLE_MODIFY_STMT, "gimple_modify_stmt", tcc_gimple_stmt, 2) | |
925c62d4 | 1112 | |
c6c91d61 | 1113 | /* Widening vector multiplication. |
1114 | The two operands are vectors with N elements of size S. Multiplying the | |
1115 | elements of the two vectors will result in N products of size 2*S. | |
1116 | VEC_WIDEN_MULT_HI_EXPR computes the N/2 high products. | |
1117 | VEC_WIDEN_MULT_LO_EXPR computes the N/2 low products. */ | |
1118 | DEFTREECODE (VEC_WIDEN_MULT_HI_EXPR, "widen_mult_hi_expr", tcc_binary, 2) | |
bfbd0ed7 | 1119 | DEFTREECODE (VEC_WIDEN_MULT_LO_EXPR, "widen_mult_lo_expr", tcc_binary, 2) |
c6c91d61 | 1120 | |
8aa4e142 | 1121 | /* Unpack (extract and promote/widen) the high/low elements of the input |
1122 | vector into the output vector. The input vector has twice as many | |
1123 | elements as the output vector, that are half the size of the elements | |
c6c91d61 | 1124 | of the output vector. This is used to support type promotion. */ |
1125 | DEFTREECODE (VEC_UNPACK_HI_EXPR, "vec_unpack_hi_expr", tcc_unary, 1) | |
1126 | DEFTREECODE (VEC_UNPACK_LO_EXPR, "vec_unpack_lo_expr", tcc_unary, 1) | |
1127 | ||
8aa4e142 | 1128 | /* Unpack (extract) the high/low elements of the input vector, convert |
1129 | fixed point values to floating point and widen elements into the | |
1130 | output vector. The input vector has twice as many elements as the output | |
1131 | vector, that are half the size of the elements of the output vector. */ | |
1132 | DEFTREECODE (VEC_UNPACK_FLOAT_HI_EXPR, "vec_unpack_float_hi_expr", tcc_unary, 1) | |
1133 | DEFTREECODE (VEC_UNPACK_FLOAT_LO_EXPR, "vec_unpack_float_lo_expr", tcc_unary, 1) | |
1134 | ||
c6c91d61 | 1135 | /* Pack (demote/narrow and merge) the elements of the two input vectors |
bb8107e7 | 1136 | into the output vector using truncation/saturation. |
c6c91d61 | 1137 | The elements of the input vectors are twice the size of the elements of the |
1138 | output vector. This is used to support type demotion. */ | |
bb8107e7 | 1139 | DEFTREECODE (VEC_PACK_TRUNC_EXPR, "vec_pack_trunc_expr", tcc_binary, 2) |
c6c91d61 | 1140 | DEFTREECODE (VEC_PACK_SAT_EXPR, "vec_pack_sat_expr", tcc_binary, 2) |
bb8107e7 | 1141 | |
8aa4e142 | 1142 | /* Convert floating point values of the two input vectors to integer |
1143 | and pack (narrow and merge) the elements into the output vector. The | |
1144 | elements of the input vector are twice the size of the elements of | |
1145 | the output vector. */ | |
1146 | DEFTREECODE (VEC_PACK_FIX_TRUNC_EXPR, "vec_pack_fix_trunc_expr", tcc_binary, 2) | |
1147 | ||
6b8dbb53 | 1148 | /* Extract even/odd fields from vectors. */ |
1149 | DEFTREECODE (VEC_EXTRACT_EVEN_EXPR, "vec_extracteven_expr", tcc_binary, 2) | |
1150 | DEFTREECODE (VEC_EXTRACT_ODD_EXPR, "vec_extractodd_expr", tcc_binary, 2) | |
1151 | ||
1152 | /* Merge input vectors interleaving their fields. */ | |
1153 | DEFTREECODE (VEC_INTERLEAVE_HIGH_EXPR, "vec_interleavehigh_expr", tcc_binary, 2) | |
1154 | DEFTREECODE (VEC_INTERLEAVE_LOW_EXPR, "vec_interleavelow_expr", tcc_binary, 2) | |
1155 | ||
247258b6 | 1156 | /* |
1157 | Local variables: | |
1158 | mode:c | |
247258b6 | 1159 | End: |
1160 | */ |