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1.1 root 1: /* This file contains the definitions and documentation for the
2: machine modes used in the the GNU compiler.
3: Copyright (C) 1987 Free Software Foundation, Inc.
4:
5: This file is part of GNU CC.
6:
7: GNU CC is distributed in the hope that it will be useful,
8: but WITHOUT ANY WARRANTY. No author or distributor
9: accepts responsibility to anyone for the consequences of using it
10: or for whether it serves any particular purpose or works at all,
11: unless he says so in writing. Refer to the GNU CC General Public
12: License for full details.
13:
14: Everyone is granted permission to copy, modify and redistribute
15: GNU CC, but only under the conditions described in the
16: GNU CC General Public License. A copy of this license is
17: supposed to have been given to you along with GNU CC so you
18: can know your rights and responsibilities. It should be in a
19: file named COPYING. Among other things, the copyright notice
20: and this notice must be preserved on all copies. */
21:
22:
23: /* The third argument can be:
24: "x" for an exceptional code (fits no category).
25: "s" for a statement code.
26: "t" for a type object code.
27:
28: "c" for codes for constants.
29: "d" for codes for declarations (also serving as variable refs).
30: "r" for codes for references to storage.
31: "e" for codes for other kinds of expressions. */
32:
33: /* Any erroneous construct is parsed into a node of this type.
34: This type of node is accepted without complaint in all contexts
35: by later parsing activities, to avoid multiple error messages
36: for one error.
37: No fields in these nodes are used except the TREE_CODE. */
38: DEFTREECODE (ERROR_MARK, "error_mark", "x", 0)
39:
40: /* Used to represent a name (such as, in the DECL_NAME of a decl node).
41: Internally it looks like a STRING_CST node.
42: There is only one IDENTIFIER_NODE ever made for any particular name.
43: Use `get_identifier' to get it (or create it, the first time). */
44: DEFTREECODE (IDENTIFIER_NODE, "identifier_node", "x", 6)
45:
46: /* Has the TREE_VALUE and TREE_PURPOSE fields. */
47: /* These nodes are made into lists by chaining through the
48: TREE_CHAIN field. The elements of the list live in the
49: TREE_VALUE fields, while TREE_PURPOSE fields are occasionally
50: used as well to get the effect of Lisp association lists. */
51: DEFTREECODE (TREE_LIST, "tree_list", "x", 2)
52:
53: /* Each data type is represented by a tree node whose code is one of
54: the following: */
55: /* Each node that represents a data type has a component TYPE_SIZE
56: containing a tree that is an expression for the size in some units.
57: The TYPE_SIZE_UNIT component is the number of bits in a unit.
58: The TYPE_MODE contains the machine mode for values of this type.
59: The TYPE_POINTER_TO field contains a type for a pointer to this type,
60: or zero if no such has been created yet.
61: The TYPE_NEXT_VARIANT field is used to chain together types
62: that are variants made by type modifiers such as "const" and "volatile".
63: The TYPE_MAIN_VARIANT field, in any member of such a chain,
64: points to the start of the chain.
65: The TYPE_NAME field contains info on the name used in the program
66: for this type (for GDB symbol table output). It is either a
67: TYPE_DECL node, for types that are typedefs, or an IDENTIFIER_NODE
68: in the case of structs, unions or enums that are known with a tag,
69: or zero for types that have no special name. */
70: /* The TREE_CHAIN of a ..._TYPE node is normally used to put
71: every type onto permanent_type_chain or temporary_type_chain (see tree.c).
72: One exception is for ENUMERAL_TYPE, RECORD_TYPE and UNION_TYPE
73: nodes used as forward-references to names; see below. */
74:
75: DEFTREECODE (VOID_TYPE, "void_type", "t", 0) /* The void type in C */
76:
77: /* Integer types in all languages, including char in C. */
78: /* Has components TYPE_MIN_VALUE, TYPE_MAX_VALUE (expressions, inclusive)
79: and TYPE_PRECISION (number of bits used by this type).
80: In the case of a subrange type in Pascal, the TREE_TYPE
81: of this will point at the supertype (another INTEGER_TYPE).
82: Otherwise, the TREE_TYPE is zero. */
83: DEFTREECODE (INTEGER_TYPE, "integer_type", "t", 0)
84:
85: /* C's float and double. Different floating types are distinguished
86: by machine mode and by the TYPE_SIZE and the TYPE_PRECISION. */
87: DEFTREECODE (REAL_TYPE, "real_type", "t", 0)
88:
89: /* Complex number types. The TREE_TYPE field is the data type
90: of the real and imaginary parts. */
91: DEFTREECODE (COMPLEX_TYPE, "complex_type", "t", 0)
92:
93: /* C enums. The type node looks just like an INTEGER_TYPE node.
94: The symbols for the values of the enum type are defined by
95: CONST_DECL nodes, but the type does not point to them;
96: however, the TREE_VALUES is a list in which each elements' TREE_PURPOSE
97: is a name and the TREE_VALUE is the value (an INTEGER_CST node). */
98: /* A forward reference `enum foo' when no enum named foo is defined yet
99: has zero (a null pointer) in its TYPE_SIZE. The tag name is in
100: the TYPE_NAME field. If the type is later defined, the normal
101: fields are filled in.
102: RECORD_TYPE and UNION_TYPE forward refs are treated similarly. */
103: DEFTREECODE (ENUMERAL_TYPE, "enumeral_type", "t", 0)
104:
105: /* Pascal's boolean type (true or false are the only values);
106: no special fields needed. */
107: DEFTREECODE (BOOLEAN_TYPE, "boolean_type", "t", 0)
108:
109: /* CHAR in Pascal; not used in C.
110: No special fields needed. */
111: DEFTREECODE (CHAR_TYPE, "char_type", "t", 0)
112:
113: /* All pointer-to-x types have code POINTER_TYPE.
114: The TREE_TYPE points to the node for the type pointed to. */
115: DEFTREECODE (POINTER_TYPE, "pointer_type", "t", 0)
116:
117: /* Used for Pascal; details not determined right now. */
118: DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
119:
120: /* Types of arrays. Special fields:
121: TREE_TYPE Type of an array element.
122: TYPE_DOMAIN Type to index by.
123: Its range of values specifies the array length.
124: TYPE_SEP Expression for units from one elt to the next.
125: TYPE_SEP_UNIT Number of bits in a unit for previous.
126: TYPE_POINTER_TO It is safe to assume, for an array type,
127: that TYPE_POINTER_TO (TREE_TYPE (array_type)) is always nonzero
128: and holds the type to coerce a value of that array type to in C. */
129: /* Array types in C or Pascal */
130: DEFTREECODE (ARRAY_TYPE, "array_type", "t", 0)
131:
132: /* Types of sets for Pascal. Special fields are the same as
133: in an array type. The target type is always a boolean type. */
134: DEFTREECODE (SET_TYPE, "set_type", "t", 0)
135:
136: /* Not known whether Pascal really needs this
137: or what it should contain. */
138: DEFTREECODE (STRING_TYPE, "string_type", "t", 0)
139:
140: /* Struct in C, or record in Pascal. */
141: /* Special fields:
142: TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct.
143: A few may need to be added for Pascal. */
144: /* See the comment above, before ENUMERAL_TYPE, for how
145: forward references to struct tags are handled in C. */
146: DEFTREECODE (RECORD_TYPE, "record_type", "t", 0)
147:
148: /* Union in C. Like a struct, except that the offsets of the fields
149: will all be zero. */
150: /* See the comment above, before ENUMERAL_TYPE, for how
151: forward references to union tags are handled in C. */
152: DEFTREECODE (UNION_TYPE, "union_type", "t", 0) /* C union type */
153:
154: /* Type of functions. Special fields:
155: TREE_TYPE type of value returned.
156: TYPE_ARG_TYPES list of types of arguments expected.
157: this list is made of TREE_LIST nodes.
158: Types of "Procedures" in languages where they are different from functions
159: have code FUNCTION_TYPE also, but then TREE_TYPE is zero or void type. */
160: DEFTREECODE (FUNCTION_TYPE, "function_type", "t", 0)
161:
162: /* All statement types have fields STMT_SOURCE_FILE and STMT_SOURCE_LINE. */
163: /* Consecutive statements within a compound statement are chained together
164: through the TREE_CHAIN field. */
165:
166: /* A label definition, encapsulated as a statement.
167: STMT_BODY is the LABEL_DECL node for the label that appears here. */
168: DEFTREECODE (LABEL_STMT, "label_stmt", "s", 1)
169:
170: /* GOTO, in any language. STMT_BODY is a LABEL_DECL node. */
171: DEFTREECODE (GOTO_STMT, "goto_stmt", "s", 1)
172:
173: /* RETURN, in any language.
174: Evaluates the expression STMT_BODY, then returns from the current function.
175: Presumably STMT_BODY is an assignment that stores into the
176: RESULT_DECL that hold the value to be returned.
177: STMT_BODY may be zero. */
178: DEFTREECODE (RETURN_STMT, "return_stmt", "s", 1)
179:
180: /* Statement that evaluates an expression. STMT_BODY is the expression. */
181: DEFTREECODE (EXPR_STMT, "expr_stmt", "s", 1)
182:
183: /* Pascal WITH statement.
184: Contains a chain of variables (..._DECL nodes) in the STMT_VARS
185: and a chain of statements (the STMT_BODY).
186: STMT_SUPERCONTEXT points to the containing declaration scope. */
187: DEFTREECODE (WITH_STMT, "with_stmt", "s", 5)
188:
189: /* Declare variables whose scope is less than a function.
190: This is used for C brace-pairs that contain declarations.
191: Contains a chain of variables (..._DECL nodes) in the STMT_VARS
192: and a chain of statements (the STMT_BODY).
193: STMT_SUPERCONTEXT points to the containing declaration scope.
194: STMT_BIND_SIZE is an expression for the size of local storage here.
195: STMT_TYPE_TAGS is a list (chain of TREE_LIST nodes)
196: pairing struct, union and enum tag names with the types they mean,
197: for tags defined in this context. */
198: DEFTREECODE (LET_STMT, "let_stmt", "s", 5)
199:
200: /* if-then-else statements in C and other languages.
201: STMT_COND is the condition (an expression).
202: STMT_THEN is the then-branch (a statement or chain of statements).
203: STMT_ELSE is the else-branch (a statement or chain of statements). */
204: DEFTREECODE (IF_STMT, "if_stmt", "s", 3)
205:
206: /* if-else-exit; used in building parts of iterations.
207: STMT_BODY is the condition (an expression).
208: Exit if the iteration if the condition is FALSE. */
209: DEFTREECODE (EXIT_STMT, "exit_stmt", "s", 1)
210:
211: /* STMT_CASE_INDEX is an expression for the value to dispatch on.
212: STMT_CASE_LIST is a list (a chain of TREE_LIST nodes)
213: of the branches of the dispatch.
214: Each such TREE_LIST node has the case it is for (a constant expression)
215: as the TREE_PURPOSE
216: and the label to go to (a LABEL_DECL) as the TREE_VALUE.
217:
218: Normally, the labels reside inside a COMPOUND_STMT
219: which contains ths CASE_STMT as its first statement. */
220: DEFTREECODE (CASE_STMT, "case_stmt", "s", 3)
221:
222: /* STMT_BODY contains a chain of statements to be executed repeatedly. */
223: DEFTREECODE (LOOP_STMT, "loop_stmt", "s", 1)
224:
225: /* Contains as its STMT_BODY a chain of substatements. */
226: DEFTREECODE (COMPOUND_STMT, "compound_stmt", "s", 1)
227:
228: /* Contains as its STMT_BODY a string of assembly code. */
229: DEFTREECODE (ASM_STMT, "asm_stmt", "s", 1)
230:
231: /* Expressions */
232:
233: /* First, the constants. */
234:
235: /* Contents are in TREE_INT_CST_LOW and TREE_INT_CST_HIGH fields,
236: 32 bits each, giving us a 64 bit constant capability.
237: Note: constants of type char in Pascal are INTEGER_CST,
238: and so are pointer constants such as nil in Pascal or NULL in C.
239: `(int *) 1' in C also results in an INTEGER_CST. */
240: DEFTREECODE (INTEGER_CST, "integer_cst", "c", 2)
241:
242: /* Contents are in TREE_REAL_CST field. Also there is TREE_CST_RTL. */
243: DEFTREECODE (REAL_CST, "real_cst", "c", 3)
244:
245: /* Contents are in TREE_REALPART and TREE_IMAGPART fields,
246: whose contents are other constant nodes.
247: Also there is TREE_CST_RTL. */
248: DEFTREECODE (COMPLEX_CST, "complex_cst", "c", 3)
249:
250: /* Contents are TREE_STRING_LENGTH and TREE_STRING_POINTER fields.
251: Also there is TREE_CST_RTL. */
252: DEFTREECODE (STRING_CST, "string_cst", "c", 3)
253:
254: /* Declarations. All references to names are represented as ..._DECL nodes.
255: The decls in one binding context are chained through the TREE_CHAIN field.
256: Each DECL has a DECL_NAME field which contains an IDENTIFIER_NODE.
257: (Some decls, most often labels, may have zero as the DECL_NAME).
258: DECL_CONTEXT points to the node representing the context in which
259: this declaration has its scope. For FIELD_DECLs, this is the
260: RECORD_TYPE or UNION_TYPE node that the field belongs to;
261: for other kinds of decl nodes, this is a LET_STMT node or the ROOT_NODE.
262: The TREE_TYPE field holds the data type of the object, when relevant.
263: LABEL_DECLs have no data type. For TYPE_DECL, the TREE_TYPE field
264: contents are the type whose name is being declared.
265: The DECL_ALIGN, DECL_SIZE, DECL_SIZE_UNIT
266: and DECL_MODE fields exist in decl nodes just as in type nodes.
267: They are unused in LABEL_DECL, TYPE_DECL and CONST_DECL nodes.
268:
269: DECL_OFFSET holds an integer number of bits offset for the location.
270: DECL_VOFFSET holds an expression for a variable offset; it is
271: to be multiplied by DECL_VOFFSET_UNIT (an integer).
272: These fields are relevant only in FIELD_DECLs and PARM_DECLs.
273:
274: DECL_INITIAL holds the value to initialize a variable to,
275: or the value of a constant. For a function, it holds the body
276: (a node of type LET_STMT representing the function's binding contour
277: and whose body contains the function's statements.)
278:
279: PARM_DECLs use a special field:
280: DECL_ARG_TYPE is the type in which the argument is actually
281: passed, which may be different from its type within the function.
282:
283: FUNCTION_DECLs use four special fields:
284: DECL_ARGUMENTS holds a chain of PARM_DECL nodes for the arguments.
285: DECL_RESULT holds a RESULT_DECL node for the value of a function,
286: or it is 0 for a function that returns no value.
287: (C functions returning void have zero here.)
288: DECL_FUNCTION_CODE is a code number that is nonzero for
289: built-in functions. Its value is an enum built_in_function
290: that says which built-in function it is.
291: DECL_BLOCK_SYMTAB_ADDRESS records (after the symtab data for the function's
292: body has been output) the address in the symtab file of the
293: `struct block' for the function's top-level binding context.
294: This must be stored in the symtab structure for the function name.
295: Also, TREE_UNSIGNED (function_decl) is nonzero if the ({...})
296: construct is used in the function.
297:
298: DECL_SOURCE_FILE holds a filename string and DECL_SOURCE_LINE
299: holds a line number. */
300:
301: DEFTREECODE (FUNCTION_DECL, "function_decl", "d", 0)
302: DEFTREECODE (LABEL_DECL, "label_decl", "d", 0)
303: DEFTREECODE (CONST_DECL, "const_decl", "d", 0)
304: DEFTREECODE (TYPE_DECL, "type_decl", "d", 0)
305: DEFTREECODE (VAR_DECL, "var_decl", "d", 0)
306: DEFTREECODE (PARM_DECL, "parm_decl", "d", 0)
307: DEFTREECODE (RESULT_DECL, "result_decl", "d", 0)
308: DEFTREECODE (FIELD_DECL, "field_decl", "d", 0)
309:
310: /* References to storage. */
311:
312: /* Value is structure or union component.
313: Operand 0 is the structure or union (an expression);
314: operand 1 is the field (a node of type FIELD_DECL). */
315: DEFTREECODE (COMPONENT_REF, "component_ref", "r", 2)
316:
317: /* C unary `*' or Pascal `^'. One operand, an expression for a pointer. */
318: DEFTREECODE (INDIRECT_REF, "indirect_ref", "r", 1)
319:
320: /* Pascal `^` on a file. One operand, an expression for the file. */
321: DEFTREECODE (BUFFER_REF, "buffer_ref", "r", 1)
322:
323: /* Array indexing in languages other than C.
324: Operand 0 is the array; operand 1 is a list of indices
325: stored as a chain of TREE_LIST nodes. */
326: DEFTREECODE (ARRAY_REF, "array_ref", "r", 2)
327:
328: /* Constructor: return an aggregate value made from specified components.
329: In C, this is used only for structure and array initializers.
330: The first "operand" is really a pointer to the RTL,
331: for constant constructors only.
332: The second operand is a list of component values
333: made out of a chain of TREE_LIST nodes. */
334: DEFTREECODE (CONSTRUCTOR, "constructor", "e", 2)
335:
336: /* The expression types are mostly straightforward,
337: with the fourth argument of DEFTREECODE saying
338: how many operands there are.
339: Unless otherwise specified, the operands are expressions. */
340:
341: /* Contains two expressions to compute, one followed by the other.
342: the first value is ignored. The second one's value is used. */
343: DEFTREECODE (COMPOUND_EXPR, "compound_expr", "e", 2)
344:
345: /* Assignment expression. Operand 0 is the what to set; 1, the new value. */
346: DEFTREECODE (MODIFY_EXPR, "modify_expr", "e", 2)
347:
348: /* Conditional expression ( ... ? ... : ... in C).
349: Operand 0 is the condition.
350: Operand 1 is the then-value.
351: Operand 2 is the else-value. */
352: DEFTREECODE (COND_EXPR, "cond_expr", "e", 3)
353:
354: /* Function call. Operand 0 is the function.
355: Operand 1 is the argument list, a list of expressions
356: made out of a chain of TREE_LIST nodes.
357: There is no operand 2. That slot is used for the
358: CALL_EXPR_RTL macro (see preexpand_calls). */
359: DEFTREECODE (CALL_EXPR, "call_expr", "e", 3)
360:
361: /* Simple arithmetic. Operands must have the same machine mode
362: and the value shares that mode. */
363: DEFTREECODE (PLUS_EXPR, "plus_expr", "e", 2)
364: DEFTREECODE (MINUS_EXPR, "minus_expr", "e", 2)
365: DEFTREECODE (MULT_EXPR, "mult_expr", "e", 2)
366:
367: /* Division for integer result that rounds the quotient toward zero. */
368: /* Operands must have the same machine mode.
369: In principle they may be real, but that is not currently supported.
370: The result is always fixed point, and it has the same type as the
371: operands if they are fixed point. */
372: DEFTREECODE (TRUNC_DIV_EXPR, "trunc_div_expr", "e", 2)
373:
374: /* Division for integer result that rounds the quotient toward infinity. */
375: DEFTREECODE (CEIL_DIV_EXPR, "ceil_div_expr", "e", 2)
376:
377: /* Division for integer result that rounds toward minus infinity. */
378: DEFTREECODE (FLOOR_DIV_EXPR, "floor_div_expr", "e", 2)
379:
380: /* Division for integer result that rounds toward nearest integer. */
381: DEFTREECODE (ROUND_DIV_EXPR, "round_div_expr", "e", 2)
382:
383: /* Four kinds of remainder that go with the four kinds of division. */
384: DEFTREECODE (TRUNC_MOD_EXPR, "trunc_mod_expr", "e", 2)
385: DEFTREECODE (CEIL_MOD_EXPR, "ceil_mod_expr", "e", 2)
386: DEFTREECODE (FLOOR_MOD_EXPR, "floor_mod_expr", "e", 2)
387: DEFTREECODE (ROUND_MOD_EXPR, "round_mod_expr", "e", 2)
388:
389: /* Division for real result. The two operands must have the same type.
390: In principle they could be integers, but currently only real
391: operands are supported. The result must have the same type
392: as the operands. */
393: DEFTREECODE (RDIV_EXPR, "rdiv_expr", "e", 2)
394:
395: /* Conversion of real to fixed point: four ways to round,
396: like the four ways to divide.
397: CONVERT_EXPR can also be used to convert a real to an integer,
398: and that is what is used in languages that do not have ways of
399: specifying which of these is wanted. Maybe these are not needed. */
400: DEFTREECODE (FIX_TRUNC_EXPR, "fix_trunc_expr", "e", 1)
401: DEFTREECODE (FIX_CEIL_EXPR, "fix_ceil_expr", "e", 1)
402: DEFTREECODE (FIX_FLOOR_EXPR, "fix_floor_expr", "e", 1)
403: DEFTREECODE (FIX_ROUND_EXPR, "fix_round_expr", "e", 1)
404:
405: /* Conversion of an integer to a real. */
406: DEFTREECODE (FLOAT_EXPR, "float_expr", "e", 1)
407:
408: /* Exponentiation. Operands may have any types;
409: constraints on value type are not known yet. */
410: DEFTREECODE (EXPON_EXPR, "expon_expr", "e", 2)
411:
412: /* Unary negation. Value has same type as operand. */
413: DEFTREECODE (NEGATE_EXPR, "negate_expr", "e", 1)
414:
415: DEFTREECODE (MIN_EXPR, "min_expr", "e", 2)
416: DEFTREECODE (MAX_EXPR, "max_expr", "e", 2)
417: DEFTREECODE (ABS_EXPR, "abs_expr", "e", 1)
418: DEFTREECODE (FFS_EXPR, "ffs_expr", "e", 1)
419:
420: /* Shift operations for shift and rotate.
421: Shift is supposed to mean logical shift if done on an
422: unsigned type, arithmetic shift on a signed type.
423: The second operand is the number of bits to
424: shift by, and must always have mode SImode.
425: The result has the same mode as the first operand. */
426: DEFTREECODE (LSHIFT_EXPR, "alshift_expr", "e", 2)
427: DEFTREECODE (RSHIFT_EXPR, "arshift_expr", "e", 2)
428: DEFTREECODE (LROTATE_EXPR, "lrotate_expr", "e", 2)
429: DEFTREECODE (RROTATE_EXPR, "rrotate_expr", "e", 2)
430:
431: /* Bitwise operations. Operands have same mode as result. */
432: DEFTREECODE (BIT_IOR_EXPR, "bit_ior_expr", "e", 2)
433: DEFTREECODE (BIT_XOR_EXPR, "bit_xor_expr", "e", 2)
434: DEFTREECODE (BIT_AND_EXPR, "bit_and_expr", "e", 2)
435: DEFTREECODE (BIT_ANDTC_EXPR, "bit_andtc_expr", "e", 2)
436: DEFTREECODE (BIT_NOT_EXPR, "bit_not_expr", "e", 1)
437:
438: /* Combination of boolean values or of integers considered only
439: as zero or nonzero. ANDIF and ORIF allow the second operand
440: not to be computed if the value of the expression is determined
441: from the first operand. AND and OR always compute the second
442: operand whether its value is needed or not (for side effects). */
443: DEFTREECODE (TRUTH_ANDIF_EXPR, "truth_andif_expr", "e", 2)
444: DEFTREECODE (TRUTH_ORIF_EXPR, "truth_orif_expr", "e", 2)
445: DEFTREECODE (TRUTH_AND_EXPR, "truth_and_expr", "e", 2)
446: DEFTREECODE (TRUTH_OR_EXPR, "truth_or_expr", "e", 2)
447: DEFTREECODE (TRUTH_NOT_EXPR, "truth_not_expr", "e", 1)
448:
449: /* Relational operators.
450: `EQ_EXPR' and `NE_EXPR' are allowed for any types.
451: The others are allowed only for integer (or pointer or enumeral)
452: or real types.
453: In all cases the operands will have the same type,
454: and the value is always the type used by the language for booleans. */
455: DEFTREECODE (LT_EXPR, "lt_expr", "e", 2)
456: DEFTREECODE (LE_EXPR, "le_expr", "e", 2)
457: DEFTREECODE (GT_EXPR, "gt_expr", "e", 2)
458: DEFTREECODE (GE_EXPR, "ge_expr", "e", 2)
459: DEFTREECODE (EQ_EXPR, "eq_expr", "e", 2)
460: DEFTREECODE (NE_EXPR, "ne_expr", "e", 2)
461:
462: /* Operations for Pascal sets. Not used now. */
463: DEFTREECODE (IN_EXPR, "in_expr", "e", 2)
464: DEFTREECODE (SET_LE_EXPR, "set_le_expr", "e", 2)
465: DEFTREECODE (CARD_EXPR, "card_expr", "e", 1)
466: DEFTREECODE (RANGE_EXPR, "range_expr", "e", 2)
467:
468: /* Represents a conversion of type of a value.
469: All conversions, including implicit ones, must be
470: represented by CONVERT_EXPR nodes. */
471: DEFTREECODE (CONVERT_EXPR, "convert_expr", "e", 1)
472:
473: /* Represents a conversion expected to require no code to be generated. */
474: DEFTREECODE (NOP_EXPR, "nop_expr", "e", 1)
475:
476: /* Represents something we computed once and will use multiple times.
477: First operand is that expression. Second is the RTL,
478: nonzero only after the expression has been computed.
479: TREE_UNSIGNED in a SAVE_EXPR is nonzero if that SAVE_EXPR
480: has been seen already in assign_vars_1. */
481: DEFTREECODE (SAVE_EXPR, "save_expr", "e", 2)
482:
483: /* Represents something whose RTL has already been expanded
484: as a sequence which should be emitted when this expression is expanded.
485: The first operand is the-the RTL to emit (which is a SEQUENCE).
486: The second is the RTL expression for the result. */
487: DEFTREECODE (RTL_EXPR, "rtl_expr", "e", 2)
488:
489: /* & in C. Value is the address at which the operand's value resides.
490: Operand may have any mode. Result mode is Pmode. */
491: DEFTREECODE (ADDR_EXPR, "addr_expr", "e", 1)
492:
493: /* Operand is a function constant; result is a function variable value
494: of typeEPmode. Used only for languages that need static chains. */
495: DEFTREECODE (ENTRY_VALUE_EXPR, "entry_value_expr", "e", 1)
496:
497: /* Given two real or integer operands of the same type,
498: returns a complex value of the corresponding complex type. */
499: DEFTREECODE (COMPLEX_EXPR, "complex_expr", "e", 2)
500:
501: /* Complex conjugate of operand. Used only on complex types.
502: The value has the same type as the operand. */
503: DEFTREECODE (CONJ_EXPR, "conj_expr", "e", 1)
504:
505: /* Used only on an operand of complex type, these return
506: a value of the corresponding component type. */
507: DEFTREECODE (REALPART_EXPR, "realpart_expr", "e", 1)
508: DEFTREECODE (IMAGPART_EXPR, "imagpart_expr", "e", 1)
509:
510: /* Nodes for ++ and -- in C.
511: The second arg is how much to increment or decrement by.
512: For a pointer, it would be the size of the object pointed to. */
513: DEFTREECODE (PREDECREMENT_EXPR, "predecrement_expr", "e", 2)
514: DEFTREECODE (PREINCREMENT_EXPR, "preincrement_expr", "e", 2)
515: DEFTREECODE (POSTDECREMENT_EXPR, "postdecrement_expr", "e", 2)
516: DEFTREECODE (POSTINCREMENT_EXPR, "postincrement_expr", "e", 2)
517:
518: /*
519: Local variables:
520: mode:c
521: version-control: t
522: End:
523: */
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