/
mojoshader_compiler.c
2656 lines (2307 loc) · 82.9 KB
1
2
3
4
5
6
7
8
9
/**
* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
10
11
12
13
// !!! FIXME: this needs to be split into separate source files:
// !!! FIXME: parse, AST, IR, etc. The problem is we need to deal with the
// !!! FIXME: "Context" struct being passed around everywhere.
14
15
#define __MOJOSHADER_INTERNAL__ 1
#include "mojoshader_internal.h"
16
17
18
19
20
#if DEBUG_COMPILER_PARSER
#define LEMON_SUPPORT_TRACING 1
#endif
21
22
// !!! FIXME: I'd like to lose this. It's really inefficient. Just keep a
// !!! FIXME: (tail) on these list structures instead?
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#define REVERSE_LINKED_LIST(typ, head) { \
if ((head) && (head->next)) { \
typ *tmp = NULL; \
typ *tmp1 = NULL; \
while (head != NULL) { \
tmp = head; \
head = head->next; \
tmp->next = tmp1; \
tmp1 = tmp; \
} \
head = tmp; \
} \
}
37
typedef union TokenData
38
{
39
40
41
int64 i64;
double dbl;
const char *string;
42
43
} TokenData;
44
45
// Structures that make up the parse tree...
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
typedef enum ASTNodeType
{
AST_OP_START_RANGE,
AST_OP_START_RANGE_UNARY,
AST_OP_POSTINCREMENT,
AST_OP_POSTDECREMENT,
AST_OP_PREINCREMENT,
AST_OP_PREDECREMENT,
AST_OP_NEGATE,
AST_OP_COMPLEMENT,
AST_OP_NOT,
AST_OP_END_RANGE_UNARY,
AST_OP_START_RANGE_BINARY,
AST_OP_DEREF_ARRAY,
AST_OP_CALLFUNC,
AST_OP_DEREF_STRUCT,
AST_OP_COMMA,
AST_OP_MULTIPLY,
AST_OP_DIVIDE,
AST_OP_MODULO,
AST_OP_ADD,
AST_OP_SUBTRACT,
AST_OP_LSHIFT,
AST_OP_RSHIFT,
AST_OP_LESSTHAN,
AST_OP_GREATERTHAN,
AST_OP_LESSTHANOREQUAL,
AST_OP_GREATERTHANOREQUAL,
AST_OP_EQUAL,
AST_OP_NOTEQUAL,
AST_OP_BINARYAND,
AST_OP_BINARYXOR,
AST_OP_BINARYOR,
AST_OP_LOGICALAND,
AST_OP_LOGICALOR,
AST_OP_ASSIGN,
AST_OP_MULASSIGN,
AST_OP_DIVASSIGN,
AST_OP_MODASSIGN,
AST_OP_ADDASSIGN,
AST_OP_SUBASSIGN,
AST_OP_LSHIFTASSIGN,
AST_OP_RSHIFTASSIGN,
AST_OP_ANDASSIGN,
AST_OP_XORASSIGN,
AST_OP_ORASSIGN,
AST_OP_END_RANGE_BINARY,
AST_OP_START_RANGE_TERNARY,
AST_OP_CONDITIONAL,
AST_OP_END_RANGE_TERNARY,
AST_OP_START_RANGE_DATA,
AST_OP_IDENTIFIER,
AST_OP_INT_LITERAL,
AST_OP_FLOAT_LITERAL,
AST_OP_STRING_LITERAL,
AST_OP_END_RANGE_DATA,
AST_OP_START_RANGE_MISC,
AST_OP_CONSTRUCTOR,
AST_OP_CAST,
AST_OP_END_RANGE_MISC,
AST_OP_END_RANGE,
AST_COMPUNIT_START_RANGE,
AST_COMPUNIT_FUNCTION, // function declaration or definition
AST_COMPUNIT_TYPEDEF, // typedef or struct
AST_COMPUNIT_STRUCT, // global struct
AST_COMPUNIT_VARIABLE, // global variable
AST_COMPUNIT_END_RANGE,
AST_STATEMENT_START_RANGE,
121
AST_STATEMENT_BLOCK,
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
AST_STATEMENT_EMPTY,
AST_STATEMENT_EXPRESSION,
AST_STATEMENT_IF,
AST_STATEMENT_SWITCH,
AST_STATEMENT_FOR,
AST_STATEMENT_DO,
AST_STATEMENT_WHILE,
AST_STATEMENT_RETURN,
AST_STATEMENT_BREAK,
AST_STATEMENT_CONTINUE,
AST_STATEMENT_DISCARD,
AST_STATEMENT_TYPEDEF,
AST_STATEMENT_STRUCT,
AST_STATEMENT_VARDECL,
AST_STATEMENT_END_RANGE,
AST_MISC_START_RANGE,
AST_FUNCTION_ARGS,
AST_FUNCTION_SIGNATURE,
AST_SCALAR_OR_ARRAY,
AST_TYPEDEF,
AST_PACK_OFFSET,
AST_VARIABLE_LOWLEVEL,
AST_ANNOTATION,
AST_VARIABLE_DECLARATION,
AST_STRUCT_DECLARATION,
AST_STRUCT_MEMBER,
AST_SWITCH_CASE,
AST_MISC_END_RANGE,
AST_END_RANGE
} ASTNodeType;
typedef struct ASTNode
{
ASTNodeType type;
const char *filename;
uint32 line;
} ASTNode;
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
typedef enum VariableAttributes
{
VARATTR_EXTERN = (1 << 0),
VARATTR_NOINTERPOLATION = (1 << 1),
VARATTR_SHARED = (1 << 2),
VARATTR_STATIC = (1 << 3),
VARATTR_UNIFORM = (1 << 4),
VARATTR_VOLATILE = (1 << 5),
VARATTR_CONST = (1 << 6),
VARATTR_ROWMAJOR = (1 << 7),
VARATTR_COLUMNMAJOR = (1 << 8)
} VariableAttributes;
typedef enum IfAttributes
{
IFATTR_NONE,
IFATTR_BRANCH,
IFATTR_FLATTEN,
IFATTR_IFALL,
IFATTR_IFANY,
IFATTR_PREDICATE,
IFATTR_PREDICATEBLOCK,
} IfAttributes;
typedef enum SwitchAttributes
{
SWITCHATTR_NONE,
SWITCHATTR_FLATTEN,
SWITCHATTR_BRANCH,
SWITCHATTR_FORCECASE,
SWITCHATTR_CALL
} SwitchAttributes;
195
static inline int operator_is_unary(const ASTNodeType op)
196
{
197
return ((op > AST_OP_START_RANGE_UNARY) && (op < AST_OP_END_RANGE_UNARY));
198
199
} // operator_is_unary
200
static inline int operator_is_binary(const ASTNodeType op)
201
{
202
return ((op > AST_OP_START_RANGE_BINARY) && (op < AST_OP_END_RANGE_BINARY));
203
204
} // operator_is_binary
205
static inline int operator_is_ternary(const ASTNodeType op)
206
{
207
return ((op > AST_OP_START_RANGE_TERNARY) && (op < AST_OP_END_RANGE_TERNARY));
208
209
} // operator_is_ternary
210
typedef struct ASTGeneric
211
{
212
213
214
215
ASTNode ast;
} ASTGeneric;
typedef ASTGeneric Expression;
216
217
218
typedef struct ExpressionUnary
{
219
ASTNode ast;
220
221
222
223
224
Expression *operand;
} ExpressionUnary;
typedef struct ExpressionBinary
{
225
ASTNode ast;
226
227
228
229
230
231
Expression *left;
Expression *right;
} ExpressionBinary;
typedef struct ExpressionTernary
{
232
ASTNode ast;
233
234
235
236
237
238
239
Expression *left;
Expression *center;
Expression *right;
} ExpressionTernary;
typedef struct ExpressionIdentifier
{
240
ASTNode ast; // Always AST_OP_IDENTIFIER
241
242
243
244
245
const char *identifier;
} ExpressionIdentifier;
typedef struct ExpressionIntLiteral
{
246
ASTNode ast; // Always AST_OP_INT_LITERAL
247
248
249
250
251
int64 value;
} ExpressionIntLiteral;
typedef struct ExpressionFloatLiteral
{
252
ASTNode ast; // Always AST_OP_FLOAT_LITERAL
253
254
255
256
257
double value;
} ExpressionFloatLiteral;
typedef struct ExpressionStringLiteral
{
258
ASTNode ast; // Always AST_OP_STRING_LITERAL
259
260
261
const char *string;
} ExpressionStringLiteral;
262
263
typedef struct ExpressionConstructor
{
264
ASTNode ast; // Always AST_OP_CONSTRUCTOR
265
266
267
268
269
270
const char *datatype;
Expression *args;
} ExpressionConstructor;
typedef struct ExpressionCast
{
271
ASTNode ast; // Always AST_OP_CAST
272
273
274
275
const char *datatype;
Expression *operand;
} ExpressionCast;
276
277
typedef struct CompilationUnit
{
278
ASTNode ast;
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
struct CompilationUnit *next;
} CompilationUnit;
typedef enum FunctionStorageClass
{
FNSTORECLS_NONE,
FNSTORECLS_INLINE
} FunctionStorageClass;
typedef enum InputModifier
{
INPUTMOD_NONE,
INPUTMOD_IN,
INPUTMOD_OUT,
INPUTMOD_INOUT,
INPUTMOD_UNIFORM
} InputModifier;
typedef enum InterpolationModifier
{
INTERPMOD_NONE,
INTERPMOD_LINEAR,
INTERPMOD_CENTROID,
INTERPMOD_NOINTERPOLATION,
INTERPMOD_NOPERSPECTIVE,
INTERPMOD_SAMPLE
} InterpolationModifier;
typedef struct FunctionArguments
{
309
ASTNode ast;
310
311
312
313
314
315
316
317
318
319
320
InputModifier input_modifier;
const char *datatype;
const char *identifier;
const char *semantic;
InterpolationModifier interpolation_modifier;
Expression *initializer;
struct FunctionArguments *next;
} FunctionArguments;
typedef struct FunctionSignature
{
321
ASTNode ast;
322
323
324
325
326
327
328
329
330
const char *datatype;
const char *identifier;
FunctionArguments *args;
FunctionStorageClass storage_class;
const char *semantic;
} FunctionSignature;
typedef struct ScalarOrArray
{
331
ASTNode ast;
332
333
334
335
336
337
338
const char *identifier;
int isarray;
Expression *dimension;
} ScalarOrArray;
typedef struct Annotations
{
339
ASTNode ast;
340
341
342
343
344
345
346
const char *datatype;
Expression *initializer;
struct Annotations *next;
} Annotations;
typedef struct PackOffset
{
347
ASTNode ast;
348
349
350
351
352
353
const char *ident1; // !!! FIXME: rename this.
const char *ident2;
} PackOffset;
typedef struct VariableLowLevel
{
354
ASTNode ast;
355
356
357
358
359
360
PackOffset *packoffset;
const char *register_name;
} VariableLowLevel;
typedef struct StructMembers
{
361
ASTNode ast;
362
363
364
365
366
367
368
369
370
const char *datatype;
const char *semantic;
ScalarOrArray *details;
InterpolationModifier interpolation_mod;
struct StructMembers *next;
} StructMembers;
typedef struct StructDeclaration
{
371
ASTNode ast;
372
373
374
375
376
377
const char *name;
StructMembers *members;
} StructDeclaration;
typedef struct VariableDeclaration
{
378
ASTNode ast;
379
380
381
382
383
384
385
386
387
388
389
390
391
int attributes;
const char *datatype;
StructDeclaration *anonymous_datatype;
ScalarOrArray *details;
const char *semantic;
Annotations *annotations;
Expression *initializer;
VariableLowLevel *lowlevel;
struct VariableDeclaration *next;
} VariableDeclaration;
typedef struct Statement
{
392
ASTNode ast;
393
394
395
396
397
398
399
400
struct Statement *next;
} Statement;
typedef Statement EmptyStatement;
typedef Statement BreakStatement;
typedef Statement ContinueStatement;
typedef Statement DiscardStatement;
401
402
403
404
405
406
407
typedef struct BlockStatement // something enclosed in "{}" braces.
{
ASTNode ast;
struct Statement *next;
Statement *statements; // list of statements enclosed by this block.
} BlockStatement;
408
409
typedef struct ReturnStatement
{
410
ASTNode ast;
411
412
413
414
415
416
struct Statement *next;
Expression *expr;
} ReturnStatement;
typedef struct ExpressionStatement
{
417
ASTNode ast;
418
419
420
421
422
423
struct Statement *next;
Expression *expr;
} ExpressionStatement;
typedef struct IfStatement
{
424
ASTNode ast;
425
426
427
428
429
430
431
432
433
struct Statement *next;
int attributes;
Expression *expr;
Statement *statement;
Statement *else_statement;
} IfStatement;
typedef struct SwitchCases
{
434
ASTNode ast;
435
436
437
438
439
440
441
Expression *expr;
Statement *statement;
struct SwitchCases *next;
} SwitchCases;
typedef struct SwitchStatement
{
442
ASTNode ast;
443
444
445
446
447
448
449
450
struct Statement *next;
int attributes;
Expression *expr;
SwitchCases *cases;
} SwitchStatement;
typedef struct WhileStatement
{
451
ASTNode ast;
452
struct Statement *next;
453
int64 unroll; // # times to unroll, 0 to loop, negative for compiler's choice.
454
455
456
457
458
459
460
461
Expression *expr;
Statement *statement;
} WhileStatement;
typedef WhileStatement DoStatement;
typedef struct ForStatement
{
462
ASTNode ast;
463
struct Statement *next;
464
int64 unroll; // # times to unroll, 0 to loop, negative for compiler's choice.
465
466
467
468
469
470
471
472
473
VariableDeclaration *var_decl;
Expression *initializer;
Expression *looptest;
Expression *counter;
Statement *statement;
} ForStatement;
typedef struct Typedef
{
474
ASTNode ast;
475
476
477
478
479
480
481
int isconst;
const char *datatype;
ScalarOrArray *details;
} Typedef;
typedef struct TypedefStatement
{
482
ASTNode ast;
483
484
485
486
487
488
struct Statement *next;
Typedef *type_info;
} TypedefStatement;
typedef struct VarDeclStatement
{
489
ASTNode ast;
490
struct Statement *next;
491
VariableDeclaration *declaration;
492
493
494
495
} VarDeclStatement;
typedef struct StructStatement
{
496
ASTNode ast;
497
498
499
500
501
502
struct Statement *next;
StructDeclaration *struct_info;
} StructStatement;
typedef struct CompilationUnitFunction
{
503
ASTNode ast;
504
505
506
507
508
509
510
struct CompilationUnit *next;
FunctionSignature *declaration;
Statement *definition;
} CompilationUnitFunction;
typedef struct CompilationUnitTypedef
{
511
ASTNode ast;
512
513
514
515
516
517
struct CompilationUnit *next;
Typedef *type_info;
} CompilationUnitTypedef;
typedef struct CompilationUnitStruct
{
518
ASTNode ast;
519
520
521
522
523
524
struct CompilationUnit *next;
StructDeclaration *struct_info;
} CompilationUnitStruct;
typedef struct CompilationUnitVariable
{
525
ASTNode ast;
526
527
528
529
530
struct CompilationUnit *next;
VariableDeclaration *declaration;
} CompilationUnitVariable;
531
// This tracks data types and variables, and notes when they enter/leave scope.
532
533
typedef struct SymbolScope
534
535
536
{
const char *symbol;
const char *datatype;
537
538
struct SymbolScope *next;
} SymbolScope;
539
540
typedef struct SymbolMap
541
{
542
543
544
HashTable *hash;
SymbolScope *scope;
} SymbolMap;
545
546
547
548
549
550
551
552
553
554
555
556
557
// Compile state, passed around all over the place.
typedef struct Context
{
int isfail;
int out_of_memory;
MOJOSHADER_malloc malloc;
MOJOSHADER_free free;
void *malloc_data;
int error_count;
ErrorList *errors;
558
StringCache *strcache;
559
560
const char *sourcefile; // current source file that we're parsing.
unsigned int sourceline; // current line in sourcefile that we're parsing.
561
562
SymbolMap usertypes;
SymbolMap variables;
563
CompilationUnit *ast; // Abstract Syntax Tree
564
565
566
567
568
569
570
571
572
// These are entries allocated in the strcache, so these pointers are
// valid from shortly after we create the cache until we destroy it
// with the rest of the context. This makes it so we can compare common
// strings by pointer without having to hash them every time, so long as
// we're comparing a string pointer we know came from this string cache.
const char *str_b; // "b"
const char *str_f; // "f"
const char *str_i; // "i"
573
574
575
576
577
578
579
} Context;
// Convenience functions for allocators...
static inline void out_of_memory(Context *ctx)
{
580
if (!ctx->out_of_memory) printf("out of memory\n"); // !!! FIXME: placeholder.
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
ctx->isfail = ctx->out_of_memory = 1;
} // out_of_memory
static inline void *Malloc(Context *ctx, const size_t len)
{
void *retval = ctx->malloc((int) len, ctx->malloc_data);
if (retval == NULL)
out_of_memory(ctx);
return retval;
} // Malloc
static inline char *StrDup(Context *ctx, const char *str)
{
char *retval = (char *) Malloc(ctx, strlen(str) + 1);
if (retval != NULL)
strcpy(retval, str);
return retval;
} // StrDup
static inline void Free(Context *ctx, void *ptr)
{
if (ptr != NULL) // check for NULL in case of dumb free() impl.
ctx->free(ptr, ctx->malloc_data);
} // Free
606
607
608
609
static void fail(Context *ctx, const char *str)
{
// !!! FIXME: placeholder.
(void) ctx;
610
printf("%s:%u: %s\n", ctx->sourcefile, ctx->sourceline, str);
611
} // fail
612
613
614
static void symbolmap_nuke(const void *k, const void *v, void *d) {/*no-op*/}
615
616
static int create_symbolmap(Context *ctx, SymbolMap *map)
617
{
618
// !!! FIXME: should compare string pointer, with string in cache.
619
map->scope = NULL;
620
621
622
623
map->hash = hash_create(ctx, hash_hash_string, hash_keymatch_string,
symbolmap_nuke, 1, ctx->malloc, ctx->free,
ctx->malloc_data);
if (!map->hash)
624
625
626
627
628
629
{
out_of_memory(ctx);
return 0;
} // if
return 1;
630
} // create_symbolmap
631
632
633
634
635
636
static void push_symbol(Context *ctx, SymbolMap *map,
const char *sym, const char *datatype)
{
SymbolScope *item = (SymbolScope *) Malloc(ctx, sizeof (SymbolScope));
637
638
639
640
641
if (item == NULL)
return;
if (sym != NULL)
{
642
if (hash_insert(map->hash, sym, datatype) == -1)
643
644
645
646
647
648
649
650
651
652
{
Free(ctx, item);
return;
}
} // if
item->symbol = sym; // cached strings, don't copy.
item->datatype = datatype;
item->next = map->scope;
map->scope = item;
653
654
655
656
657
} // push_symbol
static inline void push_usertype(Context *ctx, const char *sym, const char *dt)
{
push_symbol(ctx, &ctx->usertypes, sym, dt);
658
659
} // push_usertype
660
661
662
663
664
665
666
667
668
669
670
671
672
static inline void push_variable(Context *ctx, const char *sym, const char *dt)
{
push_symbol(ctx, &ctx->variables, sym, dt);
} // push_variable
static inline void push_scope(Context *ctx)
{
push_usertype(ctx, NULL, NULL);
push_variable(ctx, NULL, NULL);
} // push_scope
static void pop_symbol(Context *ctx, SymbolMap *map)
673
{
674
SymbolScope *item = map->scope;
675
676
677
if (!item)
return;
if (item->symbol)
678
hash_remove(map->hash, item->symbol);
679
680
map->scope = item->next;
Free(ctx, item);
681
} // pop_symbol
682
683
static void pop_symbol_scope(Context *ctx, SymbolMap *map)
684
685
{
while ((map->scope) && (map->scope->symbol))
686
pop_symbol(ctx, map);
687
688
689
assert(map->scope != NULL);
assert(map->scope->symbol == NULL);
690
691
692
693
694
695
696
pop_symbol(ctx, map);
} // pop_symbol_scope
static inline void pop_scope(Context *ctx)
{
pop_symbol_scope(ctx, &ctx->usertypes);
pop_symbol_scope(ctx, &ctx->variables);
697
698
} // push_scope
699
static void destroy_symbolmap(Context *ctx, SymbolMap *map)
700
701
{
while (map->scope)
702
703
704
pop_symbol_scope(ctx, map);
hash_destroy(map->hash);
} // destroy_symbolmap
705
706
707
708
709
710
711
// These functions are mostly for construction and cleanup of nodes in the
// parse tree. Mostly this is simple allocation and initialization, so we
// can do as little in the lemon code as possible, and then sort it all out
// afterwards.
712
#define NEW_AST_NODE(retval, cls, typ) \
713
cls *retval = (cls *) Malloc(ctx, sizeof (cls)); \
714
715
716
717
718
719
720
721
do { \
if (retval == NULL) { return NULL; } \
retval->ast.type = typ; \
retval->ast.filename = ctx->sourcefile; \
retval->ast.line = ctx->sourceline; \
} while (0)
#define DELETE_AST_NODE(cls) do { \
722
723
724
725
726
727
if (!cls) return; \
} while (0)
static void delete_compilation_unit(Context *ctx, CompilationUnit *unit);
static void delete_statement(Context *ctx, Statement *stmt);
728
729
730
static Expression *new_constructor_expr(Context *ctx, const char *datatype,
Expression *args)
{
731
NEW_AST_NODE(retval, ExpressionConstructor, AST_OP_CONSTRUCTOR);
732
733
734
735
736
737
738
739
retval->datatype = datatype;
retval->args = args;
return (Expression *) retval;
} // new_constructor_expr
static Expression *new_cast_expr(Context *ctx, const char *datatype,
Expression *operand)
{
740
NEW_AST_NODE(retval, ExpressionCast, AST_OP_CAST);
741
742
743
744
745
retval->datatype = datatype;
retval->operand = operand;
return (Expression *) retval;
} // new_cast_expr
746
static Expression *new_unary_expr(Context *ctx, const ASTNodeType op,
747
748
Expression *operand)
{
749
NEW_AST_NODE(retval, ExpressionUnary, op);
750
751
752
753
754
assert(operator_is_unary(op));
retval->operand = operand;
return (Expression *) retval;
} // new_unary_expr
755
static Expression *new_binary_expr(Context *ctx, const ASTNodeType op,
756
757
Expression *left, Expression *right)
{
758
NEW_AST_NODE(retval, ExpressionBinary, op);
759
760
761
762
763
764
assert(operator_is_binary(op));
retval->left = left;
retval->right = right;
return (Expression *) retval;
} // new_binary_expr
765
static Expression *new_ternary_expr(Context *ctx, const ASTNodeType op,
766
767
768
Expression *left, Expression *center,
Expression *right)
{
769
NEW_AST_NODE(retval, ExpressionTernary, op);
770
771
772
773
774
775
776
777
778
assert(operator_is_ternary(op));
retval->left = left;
retval->center = center;
retval->right = right;
return (Expression *) retval;
} // new_ternary_expr
static Expression *new_identifier_expr(Context *ctx, const char *string)
{
779
NEW_AST_NODE(retval, ExpressionIdentifier, AST_OP_IDENTIFIER);
780
781
782
783
784
785
retval->identifier = string; // cached; don't copy string.
return (Expression *) retval;
} // new_identifier_expr
static Expression *new_literal_int_expr(Context *ctx, const int64 value)
{
786
NEW_AST_NODE(retval, ExpressionIntLiteral, AST_OP_INT_LITERAL);
787
788
789
790
791
792
retval->value = value;
return (Expression *) retval;
} // new_literal_int_expr
static Expression *new_literal_float_expr(Context *ctx, const double dbl)
{
793
NEW_AST_NODE(retval, ExpressionFloatLiteral, AST_OP_FLOAT_LITERAL);
794
795
796
797
798
799
retval->value = dbl;
return (Expression *) retval;
} // new_literal_float_expr
static Expression *new_literal_string_expr(Context *ctx, const char *string)
{
800
NEW_AST_NODE(retval, ExpressionStringLiteral, AST_OP_STRING_LITERAL);
801
802
803
804
retval->string = string; // cached; don't copy string.
return (Expression *) retval;
} // new_string_literal_expr
805
806
807
static void delete_expr(Context *ctx, Expression *expr)
{
DELETE_AST_NODE(expr);
808
if (operator_is_unary(expr->ast.type))
809
810
811
812
{
const ExpressionUnary *unary = (const ExpressionUnary *) expr;
delete_expr(ctx, unary->operand);
} // if
813
else if (operator_is_binary(expr->ast.type))
814
815
816
817
818
{
const ExpressionBinary *binary = (const ExpressionBinary *) expr;
delete_expr(ctx, binary->left);
delete_expr(ctx, binary->right);
} // else if
819
else if (operator_is_ternary(expr->ast.type))
820
821
822
823
824
825
{
const ExpressionTernary *ternary = (const ExpressionTernary *) expr;
delete_expr(ctx, ternary->left);
delete_expr(ctx, ternary->center);
delete_expr(ctx, ternary->right);
} // else if
826
else if (expr->ast.type == AST_OP_CAST)
827
828
829
{
delete_expr(ctx, ((ExpressionCast *) expr)->operand);
} // else if
830
else if (expr->ast.type == AST_OP_CONSTRUCTOR)
831
832
833
{
delete_expr(ctx, ((ExpressionConstructor *) expr)->args);
} // else if
834
835
836
// rest of operators don't have extra data to free.
837
838
839
840
841
842
843
844
845
846
847
Free(ctx, expr);
} // delete_expr
static FunctionArguments *new_function_arg(Context *ctx,
const InputModifier inputmod,
const char *datatype,
const char *identifier,
const char *semantic,
const InterpolationModifier interpmod,
Expression *initializer)
{
848
NEW_AST_NODE(retval, FunctionArguments, AST_FUNCTION_ARGS);
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
retval->input_modifier = inputmod;
retval->datatype = datatype;
retval->identifier = identifier;
retval->semantic = semantic;
retval->interpolation_modifier = interpmod;
retval->initializer = initializer;
retval->next = NULL;
return retval;
} // new_function_arg
static void delete_function_args(Context *ctx, FunctionArguments *args)
{
DELETE_AST_NODE(args);
delete_function_args(ctx, args->next);
delete_expr(ctx, args->initializer);
Free(ctx, args);
} // delete_function_args
static FunctionSignature *new_function_signature(Context *ctx,
const char *datatype,
const char *identifier,
FunctionArguments *args)
{
872
NEW_AST_NODE(retval, FunctionSignature, AST_FUNCTION_SIGNATURE);
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
retval->datatype = datatype;
retval->identifier = identifier;
retval->args = args;
retval->storage_class = FNSTORECLS_NONE;
retval->semantic = NULL;
return retval;
} // new_function_signature
static void delete_function_signature(Context *ctx, FunctionSignature *sig)
{
DELETE_AST_NODE(sig);
delete_function_args(ctx, sig->args);
Free(ctx, sig);
} // delete_function_signature
static CompilationUnit *new_function(Context *ctx,
FunctionSignature *declaration,
Statement *definition)
{
892
NEW_AST_NODE(retval, CompilationUnitFunction, AST_COMPUNIT_FUNCTION);
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
retval->next = NULL;
retval->declaration = declaration;
retval->definition = definition;
return (CompilationUnit *) retval;
} // new_function
static void delete_function(Context *ctx, CompilationUnitFunction *unitfn)
{
DELETE_AST_NODE(unitfn);
delete_compilation_unit(ctx, unitfn->next);
delete_function_signature(ctx, unitfn->declaration);
delete_statement(ctx, unitfn->definition);
Free(ctx, unitfn);
} // delete_function
static ScalarOrArray *new_scalar_or_array(Context *ctx, const char *ident,
const int isvec, Expression *dim)
{
911
NEW_AST_NODE(retval, ScalarOrArray, AST_SCALAR_OR_ARRAY);
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
retval->identifier = ident;
retval->isarray = isvec;
retval->dimension = dim;
return retval;
} // new_scalar_or_array
static void delete_scalar_or_array(Context *ctx, ScalarOrArray *soa)
{
DELETE_AST_NODE(soa);
delete_expr(ctx, soa->dimension);
Free(ctx, soa);
} // delete_scalar_or_array
static Typedef *new_typedef(Context *ctx, int isconst, const char *datatype,
ScalarOrArray *soa)
{
928
NEW_AST_NODE(retval, Typedef, AST_TYPEDEF);
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
retval->isconst = isconst;
retval->datatype = datatype;
retval->details = soa;
return retval;
} // new_typedef
static void delete_typedef(Context *ctx, Typedef *td)
{
DELETE_AST_NODE(td);
delete_scalar_or_array(ctx, td->details);
Free(ctx, td);
} // delete_typedef
static PackOffset *new_pack_offset(Context *ctx, const char *a, const char *b)
{
944
NEW_AST_NODE(retval, PackOffset, AST_PACK_OFFSET);
945
946
947
948
949
950
951
952
953
954
955
956
957
958
retval->ident1 = a;
retval->ident2 = b;
return retval;
} // new_pack_offset
static void delete_pack_offset(Context *ctx, PackOffset *o)
{
DELETE_AST_NODE(o);
Free(ctx, o);
} // delete_pack_offset
static VariableLowLevel *new_variable_lowlevel(Context *ctx, PackOffset *po,
const char *reg)
{
959
NEW_AST_NODE(retval, VariableLowLevel, AST_VARIABLE_LOWLEVEL);
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
retval->packoffset = po;
retval->register_name = reg;
return retval;
} // new_variable_lowlevel
static void delete_variable_lowlevel(Context *ctx, VariableLowLevel *vll)
{
DELETE_AST_NODE(vll);
delete_pack_offset(ctx, vll->packoffset);
Free(ctx, vll);
} // delete_variable_lowlevel
static Annotations *new_annotation(Context *ctx, const char *datatype,
Expression *initializer)
{
975
NEW_AST_NODE(retval, Annotations, AST_ANNOTATION);
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
retval->datatype = datatype;
retval->initializer = initializer;
retval->next = NULL;
return retval;
} // new_annotation
static void delete_annotation(Context *ctx, Annotations *annotations)
{
DELETE_AST_NODE(annotations);
delete_annotation(ctx, annotations->next);
delete_expr(ctx, annotations->initializer);
Free(ctx, annotations);
} // delete_annotation
static VariableDeclaration *new_variable_declaration(Context *ctx,
ScalarOrArray *soa, const char *semantic,
Annotations *annotations, Expression *init,
VariableLowLevel *vll)
{
995
NEW_AST_NODE(retval, VariableDeclaration, AST_VARIABLE_DECLARATION);
996
997
998
999
1000
retval->attributes = 0;
retval->datatype = NULL;
retval->anonymous_datatype = NULL;
retval->details = soa;
retval->semantic = semantic;