2 * TCC - Tiny C Compiler
4 * Copyright (c) 2001-2004 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /********************************************************/
24 /* global variables */
26 /* loc : local variable index
27 ind : output code index
29 anon_sym: anonymous symbol index
31 ST_DATA
int rsym
, anon_sym
, ind
, loc
;
33 ST_DATA Sym
*sym_free_first
;
34 ST_DATA
void **sym_pools
;
35 ST_DATA
int nb_sym_pools
;
37 ST_DATA Sym
*global_stack
;
38 ST_DATA Sym
*local_stack
;
39 ST_DATA Sym
*define_stack
;
40 ST_DATA Sym
*global_label_stack
;
41 ST_DATA Sym
*local_label_stack
;
42 static int local_scope
;
44 static int section_sym
;
46 ST_DATA
int vlas_in_scope
; /* number of VLAs that are currently in scope */
47 ST_DATA
int vla_sp_root_loc
; /* vla_sp_loc for SP before any VLAs were pushed */
48 ST_DATA
int vla_sp_loc
; /* Pointer to variable holding location to store stack pointer on the stack when modifying stack pointer */
50 ST_DATA SValue __vstack
[1+VSTACK_SIZE
], *vtop
, *pvtop
;
52 ST_DATA
int const_wanted
; /* true if constant wanted */
53 ST_DATA
int nocode_wanted
; /* true if no code generation wanted for an expression */
54 ST_DATA
int global_expr
; /* true if compound literals must be allocated globally (used during initializers parsing */
55 ST_DATA CType func_vt
; /* current function return type (used by return instruction) */
56 ST_DATA
int func_var
; /* true if current function is variadic (used by return instruction) */
58 ST_DATA
int last_line_num
, last_ind
, func_ind
; /* debug last line number and pc */
59 ST_DATA
const char *funcname
;
61 ST_DATA CType char_pointer_type
, func_old_type
, int_type
, size_type
;
63 ST_DATA
struct switch_t
{
66 } **p
; int n
; /* list of case ranges */
67 int def_sym
; /* default symbol */
68 } *cur_switch
; /* current switch */
70 /* ------------------------------------------------------------------------- */
71 static void gen_cast(CType
*type
);
72 static inline CType
*pointed_type(CType
*type
);
73 static int is_compatible_types(CType
*type1
, CType
*type2
);
74 static int parse_btype(CType
*type
, AttributeDef
*ad
);
75 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
76 static void parse_expr_type(CType
*type
);
77 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
78 static void block(int *bsym
, int *csym
, int is_expr
);
79 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, int scope
);
80 static int decl0(int l
, int is_for_loop_init
);
81 static void expr_eq(void);
82 static void expr_lor_const(void);
83 static void unary_type(CType
*type
);
84 static void vla_runtime_type_size(CType
*type
, int *a
);
85 static void vla_sp_restore(void);
86 static void vla_sp_restore_root(void);
87 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
88 static void expr_type(CType
*type
);
89 ST_FUNC
void vpush64(int ty
, unsigned long long v
);
90 ST_FUNC
void vpush(CType
*type
);
91 ST_FUNC
int gvtst(int inv
, int t
);
92 ST_FUNC
int is_btype_size(int bt
);
93 static void gen_inline_functions(TCCState
*s
);
95 ST_INLN
int is_float(int t
)
99 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
|| bt
== VT_QFLOAT
;
102 /* we use our own 'finite' function to avoid potential problems with
103 non standard math libs */
104 /* XXX: endianness dependent */
105 ST_FUNC
int ieee_finite(double d
)
108 memcpy(p
, &d
, sizeof(double));
109 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
112 ST_FUNC
void test_lvalue(void)
114 if (!(vtop
->r
& VT_LVAL
))
118 ST_FUNC
void check_vstack(void)
121 tcc_error("internal compiler error: vstack leak (%d)", vtop
- pvtop
);
124 /* ------------------------------------------------------------------------- */
125 /* vstack debugging aid */
128 void pv (const char *lbl
, int a
, int b
)
131 for (i
= a
; i
< a
+ b
; ++i
) {
132 SValue
*p
= &vtop
[-i
];
133 printf("%s vtop[-%d] : type.t:%04x r:%04x r2:%04x c.i:%d\n",
134 lbl
, i
, p
->type
.t
, p
->r
, p
->r2
, (int)p
->c
.i
);
139 /* ------------------------------------------------------------------------- */
140 ST_FUNC
void tccgen_start(TCCState
*s1
)
142 cur_text_section
= NULL
;
144 anon_sym
= SYM_FIRST_ANOM
;
148 /* define some often used types */
150 char_pointer_type
.t
= VT_BYTE
;
151 mk_pointer(&char_pointer_type
);
153 size_type
.t
= VT_INT
;
155 size_type
.t
= VT_LLONG
;
157 func_old_type
.t
= VT_FUNC
;
158 func_old_type
.ref
= sym_push(SYM_FIELD
, &int_type
, FUNC_CDECL
, FUNC_OLD
);
163 /* file info: full path + filename */
164 section_sym
= put_elf_sym(symtab_section
, 0, 0,
165 ELFW(ST_INFO
)(STB_LOCAL
, STT_SECTION
), 0,
166 text_section
->sh_num
, NULL
);
167 getcwd(buf
, sizeof(buf
));
169 normalize_slashes(buf
);
171 pstrcat(buf
, sizeof(buf
), "/");
172 put_stabs_r(buf
, N_SO
, 0, 0,
173 text_section
->data_offset
, text_section
, section_sym
);
174 put_stabs_r(file
->filename
, N_SO
, 0, 0,
175 text_section
->data_offset
, text_section
, section_sym
);
177 /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
178 symbols can be safely used */
179 put_elf_sym(symtab_section
, 0, 0,
180 ELFW(ST_INFO
)(STB_LOCAL
, STT_FILE
), 0,
181 SHN_ABS
, file
->filename
);
183 #ifdef TCC_TARGET_ARM
188 ST_FUNC
void tccgen_end(TCCState
*s1
)
190 gen_inline_functions(s1
);
192 /* end of translation unit info */
194 put_stabs_r(NULL
, N_SO
, 0, 0,
195 text_section
->data_offset
, text_section
, section_sym
);
199 /* ------------------------------------------------------------------------- */
200 /* update sym->c so that it points to an external symbol in section
201 'section' with value 'value' */
203 ST_FUNC
void put_extern_sym2(Sym
*sym
, Section
*section
,
204 addr_t value
, unsigned long size
,
205 int can_add_underscore
)
207 int sym_type
, sym_bind
, sh_num
, info
, other
;
212 #ifdef CONFIG_TCC_BCHECK
218 else if (section
== SECTION_ABS
)
221 sh_num
= section
->sh_num
;
223 if ((sym
->type
.t
& VT_BTYPE
) == VT_FUNC
) {
225 } else if ((sym
->type
.t
& VT_BTYPE
) == VT_VOID
) {
226 sym_type
= STT_NOTYPE
;
228 sym_type
= STT_OBJECT
;
231 if (sym
->type
.t
& VT_STATIC
)
232 sym_bind
= STB_LOCAL
;
234 if (sym
->type
.t
& VT_WEAK
)
237 sym_bind
= STB_GLOBAL
;
241 name
= get_tok_str(sym
->v
, NULL
);
242 #ifdef CONFIG_TCC_BCHECK
243 if (tcc_state
->do_bounds_check
) {
244 /* XXX: avoid doing that for statics ? */
245 /* if bound checking is activated, we change some function
246 names by adding the "__bound" prefix */
249 /* XXX: we rely only on malloc hooks */
262 strcpy(buf
, "__bound_");
272 if (sym
->type
.t
& VT_EXPORT
)
273 other
|= ST_PE_EXPORT
;
274 if (sym_type
== STT_FUNC
&& sym
->type
.ref
) {
275 Sym
*ref
= sym
->type
.ref
;
276 if (ref
->a
.func_export
)
277 other
|= ST_PE_EXPORT
;
278 if (ref
->a
.func_call
== FUNC_STDCALL
&& can_add_underscore
) {
279 sprintf(buf1
, "_%s@%d", name
, ref
->a
.func_args
* PTR_SIZE
);
281 other
|= ST_PE_STDCALL
;
282 can_add_underscore
= 0;
285 if (find_elf_sym(tcc_state
->dynsymtab_section
, name
))
286 other
|= ST_PE_IMPORT
;
287 if (sym
->type
.t
& VT_IMPORT
)
288 other
|= ST_PE_IMPORT
;
291 if (! (sym
->type
.t
& VT_STATIC
))
292 other
= (sym
->type
.t
& VT_VIS_MASK
) >> VT_VIS_SHIFT
;
294 if (tcc_state
->leading_underscore
&& can_add_underscore
) {
296 pstrcpy(buf1
+ 1, sizeof(buf1
) - 1, name
);
299 if (sym
->asm_label
) {
300 name
= get_tok_str(sym
->asm_label
, NULL
);
302 info
= ELFW(ST_INFO
)(sym_bind
, sym_type
);
303 sym
->c
= set_elf_sym(symtab_section
, value
, size
, info
, other
, sh_num
, name
);
305 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
306 esym
->st_value
= value
;
307 esym
->st_size
= size
;
308 esym
->st_shndx
= sh_num
;
312 ST_FUNC
void put_extern_sym(Sym
*sym
, Section
*section
,
313 addr_t value
, unsigned long size
)
315 put_extern_sym2(sym
, section
, value
, size
, 1);
318 /* add a new relocation entry to symbol 'sym' in section 's' */
319 ST_FUNC
void greloca(Section
*s
, Sym
*sym
, unsigned long offset
, int type
,
325 put_extern_sym(sym
, NULL
, 0, 0);
328 /* now we can add ELF relocation info */
329 put_elf_reloca(symtab_section
, s
, offset
, type
, c
, addend
);
332 ST_FUNC
void greloc(Section
*s
, Sym
*sym
, unsigned long offset
, int type
)
334 greloca(s
, sym
, offset
, type
, 0);
337 /* ------------------------------------------------------------------------- */
338 /* symbol allocator */
339 static Sym
*__sym_malloc(void)
341 Sym
*sym_pool
, *sym
, *last_sym
;
344 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
345 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
347 last_sym
= sym_free_first
;
349 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
350 sym
->next
= last_sym
;
354 sym_free_first
= last_sym
;
358 static inline Sym
*sym_malloc(void)
361 sym
= sym_free_first
;
363 sym
= __sym_malloc();
364 sym_free_first
= sym
->next
;
368 ST_INLN
void sym_free(Sym
*sym
)
370 sym
->next
= sym_free_first
;
371 sym_free_first
= sym
;
374 /* push, without hashing */
375 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
395 /* find a symbol and return its associated structure. 's' is the top
396 of the symbol stack */
397 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
409 /* structure lookup */
410 ST_INLN Sym
*struct_find(int v
)
413 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
415 return table_ident
[v
]->sym_struct
;
418 /* find an identifier */
419 ST_INLN Sym
*sym_find(int v
)
422 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
424 return table_ident
[v
]->sym_identifier
;
427 /* push a given symbol on the symbol stack */
428 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
437 s
= sym_push2(ps
, v
, type
->t
, c
);
438 s
->type
.ref
= type
->ref
;
440 /* don't record fields or anonymous symbols */
442 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
443 /* record symbol in token array */
444 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
446 ps
= &ts
->sym_struct
;
448 ps
= &ts
->sym_identifier
;
451 s
->scope
= local_scope
;
452 if (s
->prev_tok
&& s
->prev_tok
->scope
== s
->scope
)
453 tcc_error("redeclaration of '%s'",
454 get_tok_str(v
& ~SYM_STRUCT
, NULL
));
459 /* push a global identifier */
460 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
463 s
= sym_push2(&global_stack
, v
, t
, c
);
464 /* don't record anonymous symbol */
465 if (v
< SYM_FIRST_ANOM
) {
466 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
467 /* modify the top most local identifier, so that
468 sym_identifier will point to 's' when popped */
470 ps
= &(*ps
)->prev_tok
;
477 /* pop symbols until top reaches 'b' */
478 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
488 /* remove symbol in token array */
490 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
491 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
493 ps
= &ts
->sym_struct
;
495 ps
= &ts
->sym_identifier
;
504 static void weaken_symbol(Sym
*sym
)
506 sym
->type
.t
|= VT_WEAK
;
511 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
512 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
513 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
517 static void apply_visibility(Sym
*sym
, CType
*type
)
519 int vis
= sym
->type
.t
& VT_VIS_MASK
;
520 int vis2
= type
->t
& VT_VIS_MASK
;
521 if (vis
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
523 else if (vis2
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
526 vis
= (vis
< vis2
) ? vis
: vis2
;
527 sym
->type
.t
&= ~VT_VIS_MASK
;
533 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
534 vis
>>= VT_VIS_SHIFT
;
535 esym
->st_other
= (esym
->st_other
& ~ELFW(ST_VISIBILITY
)(-1)) | vis
;
539 /* ------------------------------------------------------------------------- */
541 ST_FUNC
void swap(int *p
, int *q
)
549 static void vsetc(CType
*type
, int r
, CValue
*vc
)
553 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
554 tcc_error("memory full (vstack)");
555 /* cannot let cpu flags if other instruction are generated. Also
556 avoid leaving VT_JMP anywhere except on the top of the stack
557 because it would complicate the code generator. */
558 if (vtop
>= vstack
) {
559 v
= vtop
->r
& VT_VALMASK
;
560 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
570 /* push constant of type "type" with useless value */
571 ST_FUNC
void vpush(CType
*type
)
574 vsetc(type
, VT_CONST
, &cval
);
577 /* push integer constant */
578 ST_FUNC
void vpushi(int v
)
582 vsetc(&int_type
, VT_CONST
, &cval
);
585 /* push a pointer sized constant */
586 static void vpushs(addr_t v
)
590 vsetc(&size_type
, VT_CONST
, &cval
);
593 /* push arbitrary 64bit constant */
594 ST_FUNC
void vpush64(int ty
, unsigned long long v
)
601 vsetc(&ctype
, VT_CONST
, &cval
);
604 /* push long long constant */
605 static inline void vpushll(long long v
)
607 vpush64(VT_LLONG
, v
);
610 /* push a symbol value of TYPE */
611 static inline void vpushsym(CType
*type
, Sym
*sym
)
615 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
619 /* Return a static symbol pointing to a section */
620 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
626 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
627 sym
->type
.ref
= type
->ref
;
628 sym
->r
= VT_CONST
| VT_SYM
;
629 put_extern_sym(sym
, sec
, offset
, size
);
633 /* push a reference to a section offset by adding a dummy symbol */
634 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
636 vpushsym(type
, get_sym_ref(type
, sec
, offset
, size
));
639 /* define a new external reference to a symbol 'v' of type 'u' */
640 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
646 /* push forward reference */
647 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
648 s
->type
.ref
= type
->ref
;
649 s
->r
= r
| VT_CONST
| VT_SYM
;
654 /* define a new external reference to a symbol 'v' */
655 static Sym
*external_sym(int v
, CType
*type
, int r
)
661 /* push forward reference */
662 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
663 s
->type
.t
|= VT_EXTERN
;
664 } else if (s
->type
.ref
== func_old_type
.ref
) {
665 s
->type
.ref
= type
->ref
;
666 s
->r
= r
| VT_CONST
| VT_SYM
;
667 s
->type
.t
|= VT_EXTERN
;
668 } else if (!is_compatible_types(&s
->type
, type
)) {
669 tcc_error("incompatible types for redefinition of '%s'",
670 get_tok_str(v
, NULL
));
672 /* Merge some storage attributes. */
673 if (type
->t
& VT_WEAK
)
676 if (type
->t
& VT_VIS_MASK
)
677 apply_visibility(s
, type
);
682 /* push a reference to global symbol v */
683 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
685 vpushsym(type
, external_global_sym(v
, type
, 0));
688 ST_FUNC
void vset(CType
*type
, int r
, int v
)
693 vsetc(type
, r
, &cval
);
696 static void vseti(int r
, int v
)
704 ST_FUNC
void vswap(void)
707 /* cannot let cpu flags if other instruction are generated. Also
708 avoid leaving VT_JMP anywhere except on the top of the stack
709 because it would complicate the code generator. */
710 if (vtop
>= vstack
) {
711 int v
= vtop
->r
& VT_VALMASK
;
712 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
719 /* XXX: +2% overall speed possible with optimized memswap
721 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
725 ST_FUNC
void vpushv(SValue
*v
)
727 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
728 tcc_error("memory full (vstack)");
733 static void vdup(void)
738 /* save registers up to (vtop - n) stack entry */
739 ST_FUNC
void save_regs(int n
)
742 for(p
= vstack
, p1
= vtop
- n
; p
<= p1
; p
++)
746 /* save r to the memory stack, and mark it as being free */
747 ST_FUNC
void save_reg(int r
)
749 save_reg_upstack(r
, 0);
752 /* save r to the memory stack, and mark it as being free,
753 if seen up to (vtop - n) stack entry */
754 ST_FUNC
void save_reg_upstack(int r
, int n
)
756 int l
, saved
, size
, align
;
760 if ((r
&= VT_VALMASK
) >= VT_CONST
)
763 /* modify all stack values */
766 for(p
= vstack
, p1
= vtop
- n
; p
<= p1
; p
++) {
767 if ((p
->r
& VT_VALMASK
) == r
||
768 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
769 /* must save value on stack if not already done */
771 /* NOTE: must reload 'r' because r might be equal to r2 */
772 r
= p
->r
& VT_VALMASK
;
773 /* store register in the stack */
775 if ((p
->r
& VT_LVAL
) ||
776 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
777 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
778 type
= &char_pointer_type
;
782 size
= type_size(type
, &align
);
783 loc
= (loc
- size
) & -align
;
785 sv
.r
= VT_LOCAL
| VT_LVAL
;
788 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
789 /* x86 specific: need to pop fp register ST0 if saved */
791 o(0xd8dd); /* fstp %st(0) */
794 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
795 /* special long long case */
796 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
804 /* mark that stack entry as being saved on the stack */
805 if (p
->r
& VT_LVAL
) {
806 /* also clear the bounded flag because the
807 relocation address of the function was stored in
809 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
811 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
819 #ifdef TCC_TARGET_ARM
820 /* find a register of class 'rc2' with at most one reference on stack.
821 * If none, call get_reg(rc) */
822 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
827 for(r
=0;r
<NB_REGS
;r
++) {
828 if (reg_classes
[r
] & rc2
) {
831 for(p
= vstack
; p
<= vtop
; p
++) {
832 if ((p
->r
& VT_VALMASK
) == r
||
833 (p
->r2
& VT_VALMASK
) == r
)
844 /* find a free register of class 'rc'. If none, save one register */
845 ST_FUNC
int get_reg(int rc
)
850 /* find a free register */
851 for(r
=0;r
<NB_REGS
;r
++) {
852 if (reg_classes
[r
] & rc
) {
853 for(p
=vstack
;p
<=vtop
;p
++) {
854 if ((p
->r
& VT_VALMASK
) == r
||
855 (p
->r2
& VT_VALMASK
) == r
)
863 /* no register left : free the first one on the stack (VERY
864 IMPORTANT to start from the bottom to ensure that we don't
865 spill registers used in gen_opi()) */
866 for(p
=vstack
;p
<=vtop
;p
++) {
867 /* look at second register (if long long) */
868 r
= p
->r2
& VT_VALMASK
;
869 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
871 r
= p
->r
& VT_VALMASK
;
872 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
878 /* Should never comes here */
882 /* move register 's' (of type 't') to 'r', and flush previous value of r to memory
884 static void move_reg(int r
, int s
, int t
)
898 /* get address of vtop (vtop MUST BE an lvalue) */
899 ST_FUNC
void gaddrof(void)
901 if (vtop
->r
& VT_REF
&& !nocode_wanted
)
904 /* tricky: if saved lvalue, then we can go back to lvalue */
905 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
906 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
911 #ifdef CONFIG_TCC_BCHECK
912 /* generate lvalue bound code */
913 static void gbound(void)
918 vtop
->r
&= ~VT_MUSTBOUND
;
919 /* if lvalue, then use checking code before dereferencing */
920 if (vtop
->r
& VT_LVAL
) {
921 /* if not VT_BOUNDED value, then make one */
922 if (!(vtop
->r
& VT_BOUNDED
)) {
923 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
924 /* must save type because we must set it to int to get pointer */
926 vtop
->type
.t
= VT_PTR
;
929 gen_bounded_ptr_add();
930 vtop
->r
|= lval_type
;
933 /* then check for dereferencing */
934 gen_bounded_ptr_deref();
939 /* store vtop a register belonging to class 'rc'. lvalues are
940 converted to values. Cannot be used if cannot be converted to
941 register value (such as structures). */
942 ST_FUNC
int gv(int rc
)
944 int r
, bit_pos
, bit_size
, size
, align
, i
;
947 /* NOTE: get_reg can modify vstack[] */
948 if (vtop
->type
.t
& VT_BITFIELD
) {
951 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
952 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
953 /* remove bit field info to avoid loops */
954 vtop
->type
.t
&= ~VT_BITFIELD
& ((1 << VT_STRUCT_SHIFT
) - 1);
955 /* cast to int to propagate signedness in following ops */
956 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
961 if((vtop
->type
.t
& VT_UNSIGNED
) ||
962 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
963 type
.t
|= VT_UNSIGNED
;
965 /* generate shifts */
966 vpushi(bits
- (bit_pos
+ bit_size
));
968 vpushi(bits
- bit_size
);
969 /* NOTE: transformed to SHR if unsigned */
973 if (is_float(vtop
->type
.t
) &&
974 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
977 unsigned long offset
;
978 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
982 /* XXX: unify with initializers handling ? */
983 /* CPUs usually cannot use float constants, so we store them
984 generically in data segment */
985 size
= type_size(&vtop
->type
, &align
);
986 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
987 data_section
->data_offset
= offset
;
988 /* XXX: not portable yet */
989 #if defined(__i386__) || defined(__x86_64__)
990 /* Zero pad x87 tenbyte long doubles */
991 if (size
== LDOUBLE_SIZE
) {
992 vtop
->c
.tab
[2] &= 0xffff;
993 #if LDOUBLE_SIZE == 16
998 ptr
= section_ptr_add(data_section
, size
);
1000 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
1004 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
1008 ptr
[i
] = vtop
->c
.tab
[i
];
1009 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
1010 vtop
->r
|= VT_LVAL
| VT_SYM
;
1014 #ifdef CONFIG_TCC_BCHECK
1015 if (vtop
->r
& VT_MUSTBOUND
)
1019 r
= vtop
->r
& VT_VALMASK
;
1020 rc2
= (rc
& RC_FLOAT
) ? RC_FLOAT
: RC_INT
;
1021 #ifndef TCC_TARGET_ARM64
1024 #ifdef TCC_TARGET_X86_64
1025 else if (rc
== RC_FRET
)
1030 /* need to reload if:
1032 - lvalue (need to dereference pointer)
1033 - already a register, but not in the right class */
1035 || (vtop
->r
& VT_LVAL
)
1036 || !(reg_classes
[r
] & rc
)
1037 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1038 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
1039 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
&& !(reg_classes
[vtop
->r2
] & rc2
))
1041 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
1046 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1047 if (((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
)) {
1048 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
1050 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
1051 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
1052 unsigned long long ll
;
1054 int r2
, original_type
;
1055 original_type
= vtop
->type
.t
;
1056 /* two register type load : expand to two words
1058 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
1059 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
1062 vtop
->c
.i
= ll
; /* first word */
1064 vtop
->r
= r
; /* save register value */
1065 vpushi(ll
>> 32); /* second word */
1068 if (vtop
->r
& VT_LVAL
) {
1069 /* We do not want to modifier the long long
1070 pointer here, so the safest (and less
1071 efficient) is to save all the other registers
1072 in the stack. XXX: totally inefficient. */
1076 /* lvalue_save: save only if used further down the stack */
1077 save_reg_upstack(vtop
->r
, 1);
1079 /* load from memory */
1080 vtop
->type
.t
= load_type
;
1083 vtop
[-1].r
= r
; /* save register value */
1084 /* increment pointer to get second word */
1085 vtop
->type
.t
= addr_type
;
1090 vtop
->type
.t
= load_type
;
1092 /* move registers */
1095 vtop
[-1].r
= r
; /* save register value */
1096 vtop
->r
= vtop
[-1].r2
;
1098 /* Allocate second register. Here we rely on the fact that
1099 get_reg() tries first to free r2 of an SValue. */
1103 /* write second register */
1105 vtop
->type
.t
= original_type
;
1106 } else if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
1108 /* lvalue of scalar type : need to use lvalue type
1109 because of possible cast */
1112 /* compute memory access type */
1113 if (vtop
->r
& VT_REF
)
1114 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1119 else if (vtop
->r
& VT_LVAL_BYTE
)
1121 else if (vtop
->r
& VT_LVAL_SHORT
)
1123 if (vtop
->r
& VT_LVAL_UNSIGNED
)
1127 /* restore wanted type */
1130 /* one register type load */
1135 #ifdef TCC_TARGET_C67
1136 /* uses register pairs for doubles */
1137 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
1144 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
1145 ST_FUNC
void gv2(int rc1
, int rc2
)
1149 /* generate more generic register first. But VT_JMP or VT_CMP
1150 values must be generated first in all cases to avoid possible
1152 v
= vtop
[0].r
& VT_VALMASK
;
1153 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
1158 /* test if reload is needed for first register */
1159 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
1169 /* test if reload is needed for first register */
1170 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
1176 #ifndef TCC_TARGET_ARM64
1177 /* wrapper around RC_FRET to return a register by type */
1178 static int rc_fret(int t
)
1180 #ifdef TCC_TARGET_X86_64
1181 if (t
== VT_LDOUBLE
) {
1189 /* wrapper around REG_FRET to return a register by type */
1190 static int reg_fret(int t
)
1192 #ifdef TCC_TARGET_X86_64
1193 if (t
== VT_LDOUBLE
) {
1200 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
1201 /* expand 64bit on stack in two ints */
1202 static void lexpand(void)
1205 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1206 v
= vtop
->r
& (VT_VALMASK
| VT_LVAL
);
1207 if (v
== VT_CONST
) {
1210 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1216 vtop
[0].r
= vtop
[-1].r2
;
1217 vtop
[0].r2
= vtop
[-1].r2
= VT_CONST
;
1219 vtop
[0].type
.t
= vtop
[-1].type
.t
= VT_INT
| u
;
1223 #ifdef TCC_TARGET_ARM
1224 /* expand long long on stack */
1225 ST_FUNC
void lexpand_nr(void)
1229 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1231 vtop
->r2
= VT_CONST
;
1232 vtop
->type
.t
= VT_INT
| u
;
1233 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
1234 if (v
== VT_CONST
) {
1235 vtop
[-1].c
.i
= vtop
->c
.i
;
1236 vtop
->c
.i
= vtop
->c
.i
>> 32;
1238 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1240 vtop
->r
= vtop
[-1].r
;
1241 } else if (v
> VT_CONST
) {
1245 vtop
->r
= vtop
[-1].r2
;
1246 vtop
[-1].r2
= VT_CONST
;
1247 vtop
[-1].type
.t
= VT_INT
| u
;
1251 #if !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM64)
1252 /* build a long long from two ints */
1253 static void lbuild(int t
)
1255 gv2(RC_INT
, RC_INT
);
1256 vtop
[-1].r2
= vtop
[0].r
;
1257 vtop
[-1].type
.t
= t
;
1262 /* rotate n first stack elements to the bottom
1263 I1 ... In -> I2 ... In I1 [top is right]
1265 ST_FUNC
void vrotb(int n
)
1271 for(i
=-n
+1;i
!=0;i
++)
1272 vtop
[i
] = vtop
[i
+1];
1276 /* rotate the n elements before entry e towards the top
1277 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1279 ST_FUNC
void vrote(SValue
*e
, int n
)
1285 for(i
= 0;i
< n
- 1; i
++)
1290 /* rotate n first stack elements to the top
1291 I1 ... In -> In I1 ... I(n-1) [top is right]
1293 ST_FUNC
void vrott(int n
)
1298 /* pop stack value */
1299 ST_FUNC
void vpop(void)
1302 v
= vtop
->r
& VT_VALMASK
;
1303 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1304 /* for x86, we need to pop the FP stack */
1305 if (v
== TREG_ST0
&& !nocode_wanted
) {
1306 o(0xd8dd); /* fstp %st(0) */
1309 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1310 /* need to put correct jump if && or || without test */
1316 /* convert stack entry to register and duplicate its value in another
1318 static void gv_dup(void)
1324 #if !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM64)
1325 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1332 /* stack: H L L1 H1 */
1342 /* duplicate value */
1347 #ifdef TCC_TARGET_X86_64
1348 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1358 load(r1
, &sv
); /* move r to r1 */
1360 /* duplicates value */
1366 /* Generate value test
1368 * Generate a test for any value (jump, comparison and integers) */
1369 ST_FUNC
int gvtst(int inv
, int t
)
1371 int v
= vtop
->r
& VT_VALMASK
;
1372 if (v
!= VT_CMP
&& v
!= VT_JMP
&& v
!= VT_JMPI
) {
1376 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1377 /* constant jmp optimization */
1378 if ((vtop
->c
.i
!= 0) != inv
)
1383 return gtst(inv
, t
);
1386 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
1387 /* generate CPU independent (unsigned) long long operations */
1388 static void gen_opl(int op
)
1390 int t
, a
, b
, op1
, c
, i
;
1392 unsigned short reg_iret
= REG_IRET
;
1393 unsigned short reg_lret
= REG_LRET
;
1399 func
= TOK___divdi3
;
1402 func
= TOK___udivdi3
;
1405 func
= TOK___moddi3
;
1408 func
= TOK___umoddi3
;
1415 /* call generic long long function */
1416 vpush_global_sym(&func_old_type
, func
);
1421 vtop
->r2
= reg_lret
;
1429 //pv("gen_opl A",0,2);
1435 /* stack: L1 H1 L2 H2 */
1440 vtop
[-2] = vtop
[-3];
1443 /* stack: H1 H2 L1 L2 */
1444 //pv("gen_opl B",0,4);
1450 /* stack: H1 H2 L1 L2 ML MH */
1453 /* stack: ML MH H1 H2 L1 L2 */
1457 /* stack: ML MH H1 L2 H2 L1 */
1462 /* stack: ML MH M1 M2 */
1465 } else if (op
== '+' || op
== '-') {
1466 /* XXX: add non carry method too (for MIPS or alpha) */
1472 /* stack: H1 H2 (L1 op L2) */
1475 gen_op(op1
+ 1); /* TOK_xxxC2 */
1478 /* stack: H1 H2 (L1 op L2) */
1481 /* stack: (L1 op L2) H1 H2 */
1483 /* stack: (L1 op L2) (H1 op H2) */
1491 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1492 t
= vtop
[-1].type
.t
;
1496 /* stack: L H shift */
1498 /* constant: simpler */
1499 /* NOTE: all comments are for SHL. the other cases are
1500 done by swaping words */
1511 if (op
!= TOK_SAR
) {
1544 /* XXX: should provide a faster fallback on x86 ? */
1547 func
= TOK___ashrdi3
;
1550 func
= TOK___lshrdi3
;
1553 func
= TOK___ashldi3
;
1559 /* compare operations */
1565 /* stack: L1 H1 L2 H2 */
1567 vtop
[-1] = vtop
[-2];
1569 /* stack: L1 L2 H1 H2 */
1572 /* when values are equal, we need to compare low words. since
1573 the jump is inverted, we invert the test too. */
1576 else if (op1
== TOK_GT
)
1578 else if (op1
== TOK_ULT
)
1580 else if (op1
== TOK_UGT
)
1585 if (op1
!= TOK_NE
) {
1589 /* generate non equal test */
1590 /* XXX: NOT PORTABLE yet */
1594 #if defined(TCC_TARGET_I386)
1595 b
= psym(0x850f, 0);
1596 #elif defined(TCC_TARGET_ARM)
1598 o(0x1A000000 | encbranch(ind
, 0, 1));
1599 #elif defined(TCC_TARGET_C67) || defined(TCC_TARGET_ARM64)
1600 tcc_error("not implemented");
1602 #error not supported
1606 /* compare low. Always unsigned */
1610 else if (op1
== TOK_LE
)
1612 else if (op1
== TOK_GT
)
1614 else if (op1
== TOK_GE
)
1625 static uint64_t gen_opic_sdiv(uint64_t a
, uint64_t b
)
1627 uint64_t x
= (a
>> 63 ? -a
: a
) / (b
>> 63 ? -b
: b
);
1628 return (a
^ b
) >> 63 ? -x
: x
;
1631 static int gen_opic_lt(uint64_t a
, uint64_t b
)
1633 return (a
^ (uint64_t)1 << 63) < (b
^ (uint64_t)1 << 63);
1636 /* handle integer constant optimizations and various machine
1638 static void gen_opic(int op
)
1640 SValue
*v1
= vtop
- 1;
1642 int t1
= v1
->type
.t
& VT_BTYPE
;
1643 int t2
= v2
->type
.t
& VT_BTYPE
;
1644 int c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1645 int c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1646 uint64_t l1
= c1
? v1
->c
.i
: 0;
1647 uint64_t l2
= c2
? v2
->c
.i
: 0;
1648 int shm
= (t1
== VT_LLONG
) ? 63 : 31;
1651 l1
= ((uint32_t)l1
|
1652 (v1
->type
.t
& VT_UNSIGNED
? 0 : -(l1
& 0x80000000)));
1654 l2
= ((uint32_t)l2
|
1655 (v2
->type
.t
& VT_UNSIGNED
? 0 : -(l2
& 0x80000000)));
1659 case '+': l1
+= l2
; break;
1660 case '-': l1
-= l2
; break;
1661 case '&': l1
&= l2
; break;
1662 case '^': l1
^= l2
; break;
1663 case '|': l1
|= l2
; break;
1664 case '*': l1
*= l2
; break;
1671 /* if division by zero, generate explicit division */
1674 tcc_error("division by zero in constant");
1678 default: l1
= gen_opic_sdiv(l1
, l2
); break;
1679 case '%': l1
= l1
- l2
* gen_opic_sdiv(l1
, l2
); break;
1680 case TOK_UDIV
: l1
= l1
/ l2
; break;
1681 case TOK_UMOD
: l1
= l1
% l2
; break;
1684 case TOK_SHL
: l1
<<= (l2
& shm
); break;
1685 case TOK_SHR
: l1
>>= (l2
& shm
); break;
1687 l1
= (l1
>> 63) ? ~(~l1
>> (l2
& shm
)) : l1
>> (l2
& shm
);
1690 case TOK_ULT
: l1
= l1
< l2
; break;
1691 case TOK_UGE
: l1
= l1
>= l2
; break;
1692 case TOK_EQ
: l1
= l1
== l2
; break;
1693 case TOK_NE
: l1
= l1
!= l2
; break;
1694 case TOK_ULE
: l1
= l1
<= l2
; break;
1695 case TOK_UGT
: l1
= l1
> l2
; break;
1696 case TOK_LT
: l1
= gen_opic_lt(l1
, l2
); break;
1697 case TOK_GE
: l1
= !gen_opic_lt(l1
, l2
); break;
1698 case TOK_LE
: l1
= !gen_opic_lt(l2
, l1
); break;
1699 case TOK_GT
: l1
= gen_opic_lt(l2
, l1
); break;
1701 case TOK_LAND
: l1
= l1
&& l2
; break;
1702 case TOK_LOR
: l1
= l1
|| l2
; break;
1709 /* if commutative ops, put c2 as constant */
1710 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1711 op
== '|' || op
== '*')) {
1713 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1714 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1716 if (!const_wanted
&&
1718 (op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
)) ||
1719 (l1
== -1 && op
== TOK_SAR
))) {
1720 /* treat (0 << x), (0 >> x) and (-1 >> x) as constant */
1722 } else if (!const_wanted
&&
1723 c2
&& ((l2
== 0 && (op
== '&' || op
== '*')) ||
1724 (l2
== -1 && op
== '|') ||
1725 (l2
== 0xffffffff && t2
!= VT_LLONG
&& op
== '|') ||
1726 (l2
== 1 && (op
== '%' || op
== TOK_UMOD
)))) {
1727 /* treat (x & 0), (x * 0), (x | -1) and (x % 1) as constant */
1732 } else if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1735 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1736 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1740 /* filter out NOP operations like x*1, x-0, x&-1... */
1742 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1743 /* try to use shifts instead of muls or divs */
1744 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1753 else if (op
== TOK_PDIV
)
1759 } else if (c2
&& (op
== '+' || op
== '-') &&
1760 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1761 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1762 /* symbol + constant case */
1769 if (!nocode_wanted
) {
1770 /* call low level op generator */
1771 if (t1
== VT_LLONG
|| t2
== VT_LLONG
||
1772 (PTR_SIZE
== 8 && (t1
== VT_PTR
|| t2
== VT_PTR
)))
1783 /* generate a floating point operation with constant propagation */
1784 static void gen_opif(int op
)
1792 /* currently, we cannot do computations with forward symbols */
1793 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1794 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1796 if (v1
->type
.t
== VT_FLOAT
) {
1799 } else if (v1
->type
.t
== VT_DOUBLE
) {
1807 /* NOTE: we only do constant propagation if finite number (not
1808 NaN or infinity) (ANSI spec) */
1809 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1813 case '+': f1
+= f2
; break;
1814 case '-': f1
-= f2
; break;
1815 case '*': f1
*= f2
; break;
1819 tcc_error("division by zero in constant");
1824 /* XXX: also handles tests ? */
1828 /* XXX: overflow test ? */
1829 if (v1
->type
.t
== VT_FLOAT
) {
1831 } else if (v1
->type
.t
== VT_DOUBLE
) {
1839 if (!nocode_wanted
) {
1847 static int pointed_size(CType
*type
)
1850 return type_size(pointed_type(type
), &align
);
1853 static void vla_runtime_pointed_size(CType
*type
)
1856 vla_runtime_type_size(pointed_type(type
), &align
);
1859 static inline int is_null_pointer(SValue
*p
)
1861 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1863 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& (uint32_t)p
->c
.i
== 0) ||
1864 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.i
== 0) ||
1865 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&&
1866 (PTR_SIZE
== 4 ? (uint32_t)p
->c
.i
== 0 : p
->c
.i
== 0));
1869 static inline int is_integer_btype(int bt
)
1871 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1872 bt
== VT_INT
|| bt
== VT_LLONG
);
1875 /* check types for comparison or subtraction of pointers */
1876 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1878 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1881 /* null pointers are accepted for all comparisons as gcc */
1882 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1886 bt1
= type1
->t
& VT_BTYPE
;
1887 bt2
= type2
->t
& VT_BTYPE
;
1888 /* accept comparison between pointer and integer with a warning */
1889 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1890 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1891 tcc_warning("comparison between pointer and integer");
1895 /* both must be pointers or implicit function pointers */
1896 if (bt1
== VT_PTR
) {
1897 type1
= pointed_type(type1
);
1898 } else if (bt1
!= VT_FUNC
)
1899 goto invalid_operands
;
1901 if (bt2
== VT_PTR
) {
1902 type2
= pointed_type(type2
);
1903 } else if (bt2
!= VT_FUNC
) {
1905 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1907 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1908 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1912 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1913 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1914 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1915 /* gcc-like error if '-' is used */
1917 goto invalid_operands
;
1919 tcc_warning("comparison of distinct pointer types lacks a cast");
1923 /* generic gen_op: handles types problems */
1924 ST_FUNC
void gen_op(int op
)
1926 int u
, t1
, t2
, bt1
, bt2
, t
;
1929 t1
= vtop
[-1].type
.t
;
1930 t2
= vtop
[0].type
.t
;
1931 bt1
= t1
& VT_BTYPE
;
1932 bt2
= t2
& VT_BTYPE
;
1934 if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1935 tcc_error("operation on a struct");
1936 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1937 /* at least one operand is a pointer */
1938 /* relationnal op: must be both pointers */
1939 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1940 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1941 /* pointers are handled are unsigned */
1942 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1943 t
= VT_LLONG
| VT_UNSIGNED
;
1945 t
= VT_INT
| VT_UNSIGNED
;
1949 /* if both pointers, then it must be the '-' op */
1950 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1952 tcc_error("cannot use pointers here");
1953 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1954 /* XXX: check that types are compatible */
1955 if (vtop
[-1].type
.t
& VT_VLA
) {
1956 vla_runtime_pointed_size(&vtop
[-1].type
);
1958 vpushi(pointed_size(&vtop
[-1].type
));
1962 /* set to integer type */
1963 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1964 vtop
->type
.t
= VT_LLONG
;
1966 vtop
->type
.t
= VT_INT
;
1971 /* exactly one pointer : must be '+' or '-'. */
1972 if (op
!= '-' && op
!= '+')
1973 tcc_error("cannot use pointers here");
1974 /* Put pointer as first operand */
1975 if (bt2
== VT_PTR
) {
1980 if ((vtop
[0].type
.t
& VT_BTYPE
) == VT_LLONG
)
1981 /* XXX: truncate here because gen_opl can't handle ptr + long long */
1982 gen_cast(&int_type
);
1984 type1
= vtop
[-1].type
;
1985 type1
.t
&= ~VT_ARRAY
;
1986 if (vtop
[-1].type
.t
& VT_VLA
)
1987 vla_runtime_pointed_size(&vtop
[-1].type
);
1989 u
= pointed_size(&vtop
[-1].type
);
1991 tcc_error("unknown array element size");
1992 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1995 /* XXX: cast to int ? (long long case) */
2001 /* #ifdef CONFIG_TCC_BCHECK
2002 The main reason to removing this code:
2009 fprintf(stderr, "v+i-j = %p\n", v+i-j);
2010 fprintf(stderr, "v+(i-j) = %p\n", v+(i-j));
2012 When this code is on. then the output looks like
2014 v+(i-j) = 0xbff84000
2016 /* if evaluating constant expression, no code should be
2017 generated, so no bound check */
2018 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
2019 /* if bounded pointers, we generate a special code to
2026 gen_bounded_ptr_add();
2032 /* put again type if gen_opic() swaped operands */
2035 } else if (is_float(bt1
) || is_float(bt2
)) {
2036 /* compute bigger type and do implicit casts */
2037 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
2039 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
2044 /* floats can only be used for a few operations */
2045 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
2046 (op
< TOK_ULT
|| op
> TOK_GT
))
2047 tcc_error("invalid operands for binary operation");
2049 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
2050 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
2051 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
2054 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
2055 /* cast to biggest op */
2057 /* convert to unsigned if it does not fit in a long long */
2058 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
2059 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
2063 /* integer operations */
2065 /* convert to unsigned if it does not fit in an integer */
2066 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
2067 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
2070 /* XXX: currently, some unsigned operations are explicit, so
2071 we modify them here */
2072 if (t
& VT_UNSIGNED
) {
2079 else if (op
== TOK_LT
)
2081 else if (op
== TOK_GT
)
2083 else if (op
== TOK_LE
)
2085 else if (op
== TOK_GE
)
2092 /* special case for shifts and long long: we keep the shift as
2094 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
2101 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
2102 /* relationnal op: the result is an int */
2103 vtop
->type
.t
= VT_INT
;
2108 // Make sure that we have converted to an rvalue:
2109 if (vtop
->r
& VT_LVAL
&& !nocode_wanted
)
2110 gv(is_float(vtop
->type
.t
& VT_BTYPE
) ? RC_FLOAT
: RC_INT
);
2113 #ifndef TCC_TARGET_ARM
2114 /* generic itof for unsigned long long case */
2115 static void gen_cvt_itof1(int t
)
2117 #ifdef TCC_TARGET_ARM64
2120 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
2121 (VT_LLONG
| VT_UNSIGNED
)) {
2124 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
2125 #if LDOUBLE_SIZE != 8
2126 else if (t
== VT_LDOUBLE
)
2127 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
2130 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
2134 vtop
->r
= reg_fret(t
);
2142 /* generic ftoi for unsigned long long case */
2143 static void gen_cvt_ftoi1(int t
)
2145 #ifdef TCC_TARGET_ARM64
2150 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
2151 /* not handled natively */
2152 st
= vtop
->type
.t
& VT_BTYPE
;
2154 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
2155 #if LDOUBLE_SIZE != 8
2156 else if (st
== VT_LDOUBLE
)
2157 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
2160 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
2165 vtop
->r2
= REG_LRET
;
2172 /* force char or short cast */
2173 static void force_charshort_cast(int t
)
2177 /* XXX: add optimization if lvalue : just change type and offset */
2182 if (t
& VT_UNSIGNED
) {
2183 vpushi((1 << bits
) - 1);
2186 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
)
2192 /* result must be signed or the SAR is converted to an SHL
2193 This was not the case when "t" was a signed short
2194 and the last value on the stack was an unsigned int */
2195 vtop
->type
.t
&= ~VT_UNSIGNED
;
2201 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
2202 static void gen_cast(CType
*type
)
2204 int sbt
, dbt
, sf
, df
, c
, p
;
2206 /* special delayed cast for char/short */
2207 /* XXX: in some cases (multiple cascaded casts), it may still
2209 if (vtop
->r
& VT_MUSTCAST
) {
2210 vtop
->r
&= ~VT_MUSTCAST
;
2211 force_charshort_cast(vtop
->type
.t
);
2214 /* bitfields first get cast to ints */
2215 if (vtop
->type
.t
& VT_BITFIELD
&& !nocode_wanted
) {
2219 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
2220 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
2225 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
2226 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
2228 /* constant case: we can do it now */
2229 /* XXX: in ISOC, cannot do it if error in convert */
2230 if (sbt
== VT_FLOAT
)
2231 vtop
->c
.ld
= vtop
->c
.f
;
2232 else if (sbt
== VT_DOUBLE
)
2233 vtop
->c
.ld
= vtop
->c
.d
;
2236 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
2237 if ((sbt
& VT_UNSIGNED
) || !(vtop
->c
.i
>> 63))
2238 vtop
->c
.ld
= vtop
->c
.i
;
2240 vtop
->c
.ld
= -(long double)-vtop
->c
.i
;
2242 if ((sbt
& VT_UNSIGNED
) || !(vtop
->c
.i
>> 31))
2243 vtop
->c
.ld
= (uint32_t)vtop
->c
.i
;
2245 vtop
->c
.ld
= -(long double)-(uint32_t)vtop
->c
.i
;
2248 if (dbt
== VT_FLOAT
)
2249 vtop
->c
.f
= (float)vtop
->c
.ld
;
2250 else if (dbt
== VT_DOUBLE
)
2251 vtop
->c
.d
= (double)vtop
->c
.ld
;
2252 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
2253 vtop
->c
.i
= vtop
->c
.ld
;
2254 } else if (sf
&& dbt
== VT_BOOL
) {
2255 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
2258 vtop
->c
.i
= vtop
->c
.ld
;
2259 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
2261 else if (sbt
& VT_UNSIGNED
)
2262 vtop
->c
.i
= (uint32_t)vtop
->c
.i
;
2263 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2264 else if (sbt
== VT_PTR
)
2267 else if (sbt
!= VT_LLONG
)
2268 vtop
->c
.i
= ((uint32_t)vtop
->c
.i
|
2269 -(vtop
->c
.i
& 0x80000000));
2271 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
2273 else if (dbt
== VT_BOOL
)
2274 vtop
->c
.i
= (vtop
->c
.i
!= 0);
2275 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2276 else if (dbt
== VT_PTR
)
2279 else if (dbt
!= VT_LLONG
) {
2280 uint32_t m
= ((dbt
& VT_BTYPE
) == VT_BYTE
? 0xff :
2281 (dbt
& VT_BTYPE
) == VT_SHORT
? 0xffff :
2284 if (!(dbt
& VT_UNSIGNED
))
2285 vtop
->c
.i
|= -(vtop
->c
.i
& ((m
>> 1) + 1));
2288 } else if (p
&& dbt
== VT_BOOL
) {
2291 } else if (!nocode_wanted
) {
2292 /* non constant case: generate code */
2294 /* convert from fp to fp */
2297 /* convert int to fp */
2300 /* convert fp to int */
2301 if (dbt
== VT_BOOL
) {
2305 /* we handle char/short/etc... with generic code */
2306 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
2307 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
2311 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
2312 /* additional cast for char/short... */
2317 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
2318 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
2319 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
2320 /* scalar to long long */
2321 /* machine independent conversion */
2323 /* generate high word */
2324 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2328 if (sbt
== VT_PTR
) {
2329 /* cast from pointer to int before we apply
2330 shift operation, which pointers don't support*/
2331 gen_cast(&int_type
);
2337 /* patch second register */
2338 vtop
[-1].r2
= vtop
->r
;
2342 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2343 (dbt
& VT_BTYPE
) == VT_PTR
||
2344 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2345 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2346 (sbt
& VT_BTYPE
) != VT_PTR
&&
2347 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2348 /* need to convert from 32bit to 64bit */
2350 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2351 #if defined(TCC_TARGET_ARM64)
2353 #elif defined(TCC_TARGET_X86_64)
2355 /* x86_64 specific: movslq */
2357 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2364 } else if (dbt
== VT_BOOL
) {
2365 /* scalar to bool */
2368 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2369 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2370 if (sbt
== VT_PTR
) {
2371 vtop
->type
.t
= VT_INT
;
2372 tcc_warning("nonportable conversion from pointer to char/short");
2374 force_charshort_cast(dbt
);
2375 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
2376 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2378 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
2379 /* from long long: just take low order word */
2383 /* if lvalue and single word type, nothing to do because
2384 the lvalue already contains the real type size (see
2385 VT_LVAL_xxx constants) */
2389 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2390 /* if we are casting between pointer types,
2391 we must update the VT_LVAL_xxx size */
2392 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2393 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2398 /* return type size as known at compile time. Put alignment at 'a' */
2399 ST_FUNC
int type_size(CType
*type
, int *a
)
2404 bt
= type
->t
& VT_BTYPE
;
2405 if (bt
== VT_STRUCT
) {
2410 } else if (bt
== VT_PTR
) {
2411 if (type
->t
& VT_ARRAY
) {
2415 ts
= type_size(&s
->type
, a
);
2417 if (ts
< 0 && s
->c
< 0)
2425 } else if (bt
== VT_LDOUBLE
) {
2427 return LDOUBLE_SIZE
;
2428 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2429 #ifdef TCC_TARGET_I386
2430 #ifdef TCC_TARGET_PE
2435 #elif defined(TCC_TARGET_ARM)
2445 } else if (bt
== VT_INT
|| bt
== VT_FLOAT
) {
2448 } else if (bt
== VT_SHORT
) {
2451 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2454 } else if (bt
== VT_ENUM
) {
2456 /* Enums might be incomplete, so don't just return '4' here. */
2457 return type
->ref
->c
;
2459 /* char, void, function, _Bool */
2465 /* push type size as known at runtime time on top of value stack. Put
2467 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2469 if (type
->t
& VT_VLA
) {
2470 type_size(&type
->ref
->type
, a
);
2471 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2473 vpushi(type_size(type
, a
));
2477 static void vla_sp_restore(void) {
2478 if (vlas_in_scope
) {
2479 gen_vla_sp_restore(vla_sp_loc
);
2483 static void vla_sp_restore_root(void) {
2484 if (vlas_in_scope
) {
2485 gen_vla_sp_restore(vla_sp_root_loc
);
2489 /* return the pointed type of t */
2490 static inline CType
*pointed_type(CType
*type
)
2492 return &type
->ref
->type
;
2495 /* modify type so that its it is a pointer to type. */
2496 ST_FUNC
void mk_pointer(CType
*type
)
2499 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2500 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2504 /* compare function types. OLD functions match any new functions */
2505 static int is_compatible_func(CType
*type1
, CType
*type2
)
2511 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2513 /* check func_call */
2514 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2516 /* XXX: not complete */
2517 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2521 while (s1
!= NULL
) {
2524 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2534 /* return true if type1 and type2 are the same. If unqualified is
2535 true, qualifiers on the types are ignored.
2537 - enums are not checked as gcc __builtin_types_compatible_p ()
2539 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2543 t1
= type1
->t
& VT_TYPE
;
2544 t2
= type2
->t
& VT_TYPE
;
2546 /* strip qualifiers before comparing */
2547 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2548 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2550 /* Default Vs explicit signedness only matters for char */
2551 if ((t1
& VT_BTYPE
) != VT_BYTE
) {
2555 /* XXX: bitfields ? */
2558 /* test more complicated cases */
2559 bt1
= t1
& VT_BTYPE
;
2560 if (bt1
== VT_PTR
) {
2561 type1
= pointed_type(type1
);
2562 type2
= pointed_type(type2
);
2563 return is_compatible_types(type1
, type2
);
2564 } else if (bt1
== VT_STRUCT
) {
2565 return (type1
->ref
== type2
->ref
);
2566 } else if (bt1
== VT_FUNC
) {
2567 return is_compatible_func(type1
, type2
);
2573 /* return true if type1 and type2 are exactly the same (including
2576 static int is_compatible_types(CType
*type1
, CType
*type2
)
2578 return compare_types(type1
,type2
,0);
2581 /* return true if type1 and type2 are the same (ignoring qualifiers).
2583 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2585 return compare_types(type1
,type2
,1);
2588 /* print a type. If 'varstr' is not NULL, then the variable is also
2589 printed in the type */
2591 /* XXX: add array and function pointers */
2592 static void type_to_str(char *buf
, int buf_size
,
2593 CType
*type
, const char *varstr
)
2600 t
= type
->t
& VT_TYPE
;
2603 if (t
& VT_CONSTANT
)
2604 pstrcat(buf
, buf_size
, "const ");
2605 if (t
& VT_VOLATILE
)
2606 pstrcat(buf
, buf_size
, "volatile ");
2607 if ((t
& (VT_DEFSIGN
| VT_UNSIGNED
)) == (VT_DEFSIGN
| VT_UNSIGNED
))
2608 pstrcat(buf
, buf_size
, "unsigned ");
2609 else if (t
& VT_DEFSIGN
)
2610 pstrcat(buf
, buf_size
, "signed ");
2640 tstr
= "long double";
2642 pstrcat(buf
, buf_size
, tstr
);
2646 if (bt
== VT_STRUCT
)
2650 pstrcat(buf
, buf_size
, tstr
);
2651 v
= type
->ref
->v
& ~SYM_STRUCT
;
2652 if (v
>= SYM_FIRST_ANOM
)
2653 pstrcat(buf
, buf_size
, "<anonymous>");
2655 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2659 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2660 pstrcat(buf
, buf_size
, "(");
2662 while (sa
!= NULL
) {
2663 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2664 pstrcat(buf
, buf_size
, buf1
);
2667 pstrcat(buf
, buf_size
, ", ");
2669 pstrcat(buf
, buf_size
, ")");
2674 snprintf(buf1
, sizeof(buf1
), "%s[%ld]", varstr
? varstr
: "", s
->c
);
2675 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2678 pstrcpy(buf1
, sizeof(buf1
), "*");
2679 if (t
& VT_CONSTANT
)
2680 pstrcat(buf1
, buf_size
, "const ");
2681 if (t
& VT_VOLATILE
)
2682 pstrcat(buf1
, buf_size
, "volatile ");
2684 pstrcat(buf1
, sizeof(buf1
), varstr
);
2685 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2689 pstrcat(buf
, buf_size
, " ");
2690 pstrcat(buf
, buf_size
, varstr
);
2695 /* verify type compatibility to store vtop in 'dt' type, and generate
2697 static void gen_assign_cast(CType
*dt
)
2699 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2700 char buf1
[256], buf2
[256];
2703 st
= &vtop
->type
; /* source type */
2704 dbt
= dt
->t
& VT_BTYPE
;
2705 sbt
= st
->t
& VT_BTYPE
;
2706 if (sbt
== VT_VOID
|| dbt
== VT_VOID
) {
2707 if (sbt
== VT_VOID
&& dbt
== VT_VOID
)
2709 It is Ok if both are void
2715 gcc accepts this program
2718 tcc_error("cannot cast from/to void");
2720 if (dt
->t
& VT_CONSTANT
)
2721 tcc_warning("assignment of read-only location");
2724 /* special cases for pointers */
2725 /* '0' can also be a pointer */
2726 if (is_null_pointer(vtop
))
2728 /* accept implicit pointer to integer cast with warning */
2729 if (is_integer_btype(sbt
)) {
2730 tcc_warning("assignment makes pointer from integer without a cast");
2733 type1
= pointed_type(dt
);
2734 /* a function is implicitely a function pointer */
2735 if (sbt
== VT_FUNC
) {
2736 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2737 !is_compatible_types(pointed_type(dt
), st
))
2738 tcc_warning("assignment from incompatible pointer type");
2743 type2
= pointed_type(st
);
2744 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2745 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2746 /* void * can match anything */
2748 /* exact type match, except for unsigned */
2751 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2753 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2755 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2756 tcc_warning("assignment from incompatible pointer type");
2758 /* check const and volatile */
2759 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2760 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2761 tcc_warning("assignment discards qualifiers from pointer target type");
2767 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2768 tcc_warning("assignment makes integer from pointer without a cast");
2769 } else if (sbt
== VT_STRUCT
) {
2770 goto case_VT_STRUCT
;
2772 /* XXX: more tests */
2778 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2779 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2780 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2782 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2783 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2784 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2792 /* store vtop in lvalue pushed on stack */
2793 ST_FUNC
void vstore(void)
2795 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2797 ft
= vtop
[-1].type
.t
;
2798 sbt
= vtop
->type
.t
& VT_BTYPE
;
2799 dbt
= ft
& VT_BTYPE
;
2800 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2801 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2802 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2803 /* optimize char/short casts */
2804 delayed_cast
= VT_MUSTCAST
;
2805 vtop
->type
.t
= (ft
& VT_TYPE
& ~VT_BITFIELD
&
2806 ((1 << VT_STRUCT_SHIFT
) - 1));
2807 /* XXX: factorize */
2808 if (ft
& VT_CONSTANT
)
2809 tcc_warning("assignment of read-only location");
2812 if (!(ft
& VT_BITFIELD
))
2813 gen_assign_cast(&vtop
[-1].type
);
2816 if (sbt
== VT_STRUCT
) {
2817 /* if structure, only generate pointer */
2818 /* structure assignment : generate memcpy */
2819 /* XXX: optimize if small size */
2820 if (!nocode_wanted
) {
2821 size
= type_size(&vtop
->type
, &align
);
2825 vtop
->type
.t
= VT_PTR
;
2828 /* address of memcpy() */
2831 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2832 else if(!(align
& 3))
2833 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2836 /* Use memmove, rather than memcpy, as dest and src may be same: */
2837 vpush_global_sym(&func_old_type
, TOK_memmove
);
2842 vtop
->type
.t
= VT_PTR
;
2851 /* leave source on stack */
2852 } else if (ft
& VT_BITFIELD
) {
2853 /* bitfield store handling */
2855 /* save lvalue as expression result (example: s.b = s.a = n;) */
2856 vdup(), vtop
[-1] = vtop
[-2];
2858 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2859 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2860 /* remove bit field info to avoid loops */
2861 vtop
[-1].type
.t
= ft
& ~VT_BITFIELD
& ((1 << VT_STRUCT_SHIFT
) - 1);
2863 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2864 gen_cast(&vtop
[-1].type
);
2865 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2868 /* duplicate destination */
2870 vtop
[-1] = vtop
[-2];
2872 /* mask and shift source */
2873 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2874 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2875 vpushll((1ULL << bit_size
) - 1ULL);
2877 vpushi((1 << bit_size
) - 1);
2883 /* load destination, mask and or with source */
2885 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2886 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2888 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2894 /* ... and discard */
2898 if (!nocode_wanted
) {
2899 #ifdef CONFIG_TCC_BCHECK
2900 /* bound check case */
2901 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2910 #ifdef TCC_TARGET_X86_64
2911 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2913 } else if ((ft
& VT_BTYPE
) == VT_QFLOAT
) {
2918 r
= gv(rc
); /* generate value */
2919 /* if lvalue was saved on stack, must read it */
2920 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2922 t
= get_reg(RC_INT
);
2923 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2928 sv
.r
= VT_LOCAL
| VT_LVAL
;
2929 sv
.c
.i
= vtop
[-1].c
.i
;
2931 vtop
[-1].r
= t
| VT_LVAL
;
2933 /* two word case handling : store second register at word + 4 (or +8 for x86-64) */
2934 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2935 if (((ft
& VT_BTYPE
) == VT_QLONG
) || ((ft
& VT_BTYPE
) == VT_QFLOAT
)) {
2936 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2938 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2939 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
2941 vtop
[-1].type
.t
= load_type
;
2944 /* convert to int to increment easily */
2945 vtop
->type
.t
= addr_type
;
2951 vtop
[-1].type
.t
= load_type
;
2952 /* XXX: it works because r2 is spilled last ! */
2953 store(vtop
->r2
, vtop
- 1);
2959 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2960 vtop
->r
|= delayed_cast
;
2964 /* post defines POST/PRE add. c is the token ++ or -- */
2965 ST_FUNC
void inc(int post
, int c
)
2968 vdup(); /* save lvalue */
2971 gv_dup(); /* duplicate value */
2973 vdup(); /* duplicate value */
2978 vpushi(c
- TOK_MID
);
2980 vstore(); /* store value */
2982 vpop(); /* if post op, return saved value */
2985 /* Parse GNUC __attribute__ extension. Currently, the following
2986 extensions are recognized:
2987 - aligned(n) : set data/function alignment.
2988 - packed : force data alignment to 1
2989 - section(x) : generate data/code in this section.
2990 - unused : currently ignored, but may be used someday.
2991 - regparm(n) : pass function parameters in registers (i386 only)
2993 static void parse_attribute(AttributeDef
*ad
)
2997 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
3001 while (tok
!= ')') {
3002 if (tok
< TOK_IDENT
)
3003 expect("attribute name");
3011 expect("section name");
3012 ad
->section
= find_section(tcc_state
, (char *)tokc
.str
.data
);
3020 expect("alias(\"target\")");
3021 ad
->alias_target
= /* save string as token, for later */
3022 tok_alloc((char*)tokc
.str
.data
, tokc
.str
.size
-1)->tok
;
3026 case TOK_VISIBILITY1
:
3027 case TOK_VISIBILITY2
:
3030 expect("visibility(\"default|hidden|internal|protected\")");
3031 if (!strcmp (tokc
.str
.data
, "default"))
3032 ad
->a
.visibility
= STV_DEFAULT
;
3033 else if (!strcmp (tokc
.str
.data
, "hidden"))
3034 ad
->a
.visibility
= STV_HIDDEN
;
3035 else if (!strcmp (tokc
.str
.data
, "internal"))
3036 ad
->a
.visibility
= STV_INTERNAL
;
3037 else if (!strcmp (tokc
.str
.data
, "protected"))
3038 ad
->a
.visibility
= STV_PROTECTED
;
3040 expect("visibility(\"default|hidden|internal|protected\")");
3049 if (n
<= 0 || (n
& (n
- 1)) != 0)
3050 tcc_error("alignment must be a positive power of two");
3067 /* currently, no need to handle it because tcc does not
3068 track unused objects */
3072 /* currently, no need to handle it because tcc does not
3073 track unused objects */
3078 ad
->a
.func_call
= FUNC_CDECL
;
3083 ad
->a
.func_call
= FUNC_STDCALL
;
3085 #ifdef TCC_TARGET_I386
3095 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
3101 ad
->a
.func_call
= FUNC_FASTCALLW
;
3108 ad
->a
.mode
= VT_LLONG
+ 1;
3111 ad
->a
.mode
= VT_BYTE
+ 1;
3114 ad
->a
.mode
= VT_SHORT
+ 1;
3118 ad
->a
.mode
= VT_INT
+ 1;
3121 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
3128 ad
->a
.func_export
= 1;
3131 ad
->a
.func_import
= 1;
3134 if (tcc_state
->warn_unsupported
)
3135 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
3136 /* skip parameters */
3138 int parenthesis
= 0;
3142 else if (tok
== ')')
3145 } while (parenthesis
&& tok
!= -1);
3158 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
3159 static void struct_decl(CType
*type
, AttributeDef
*ad
, int u
)
3161 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
, extra_bytes
;
3162 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
3163 Sym
*s
, *ss
, *ass
, **ps
;
3167 a
= tok
; /* save decl type */
3169 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
3170 parse_attribute(ad
);
3176 /* struct already defined ? return it */
3178 expect("struct/union/enum name");
3180 if (s
&& (s
->scope
== local_scope
|| (tok
!= '{' && tok
!= ';'))) {
3182 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
3190 /* we put an undefined size for struct/union */
3191 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
3192 s
->r
= 0; /* default alignment is zero as gcc */
3193 /* put struct/union/enum name in type */
3201 tcc_error("struct/union/enum already defined");
3202 /* cannot be empty */
3204 /* non empty enums are not allowed */
3205 if (a
== TOK_ENUM
) {
3209 expect("identifier");
3211 if (ss
&& !local_stack
)
3212 tcc_error("redefinition of enumerator '%s'",
3213 get_tok_str(v
, NULL
));
3219 /* enum symbols have static storage */
3220 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
3221 ss
->type
.t
|= VT_STATIC
;
3226 /* NOTE: we accept a trailing comma */
3230 s
->c
= type_size(&int_type
, &align
);
3239 while (tok
!= '}') {
3240 parse_btype(&btype
, &ad1
);
3244 tcc_error("flexible array member '%s' not at the end of struct",
3245 get_tok_str(v
, NULL
));
3250 type_decl(&type1
, &ad1
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3252 if ((type1
.t
& VT_BTYPE
) != VT_STRUCT
)
3253 expect("identifier");
3255 int v
= btype
.ref
->v
;
3256 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
3257 if (tcc_state
->ms_extensions
== 0)
3258 expect("identifier");
3262 if (type_size(&type1
, &align
) < 0) {
3263 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
3266 tcc_error("field '%s' has incomplete type",
3267 get_tok_str(v
, NULL
));
3269 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
3270 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
3271 tcc_error("invalid type for '%s'",
3272 get_tok_str(v
, NULL
));
3276 bit_size
= expr_const();
3277 /* XXX: handle v = 0 case for messages */
3279 tcc_error("negative width in bit-field '%s'",
3280 get_tok_str(v
, NULL
));
3281 if (v
&& bit_size
== 0)
3282 tcc_error("zero width for bit-field '%s'",
3283 get_tok_str(v
, NULL
));
3285 size
= type_size(&type1
, &align
);
3286 if (ad1
.a
.aligned
) {
3287 if (align
< ad1
.a
.aligned
)
3288 align
= ad1
.a
.aligned
;
3289 } else if (ad1
.a
.packed
) {
3291 } else if (*tcc_state
->pack_stack_ptr
) {
3292 if (align
> *tcc_state
->pack_stack_ptr
)
3293 align
= *tcc_state
->pack_stack_ptr
;
3296 if (bit_size
>= 0) {
3297 bt
= type1
.t
& VT_BTYPE
;
3304 tcc_error("bitfields must have scalar type");
3306 if (bit_size
> bsize
) {
3307 tcc_error("width of '%s' exceeds its type",
3308 get_tok_str(v
, NULL
));
3309 } else if (bit_size
== bsize
) {
3310 /* no need for bit fields */
3312 } else if (bit_size
== 0) {
3313 /* XXX: what to do if only padding in a
3315 /* zero size: means to pad */
3318 /* if type change, union, or will overrun
3319 * allignment slot, start at a newly
3321 if ((bit_pos
+ bit_size
) > bsize
||
3322 bt
!= prevbt
|| a
== TOK_UNION
)
3325 /* XXX: handle LSB first */
3326 type1
.t
|= VT_BITFIELD
|
3327 (bit_pos
<< VT_STRUCT_SHIFT
) |
3328 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
3329 bit_pos
+= bit_size
;
3330 /* without ms-bitfields, allocate the
3331 * minimum number of bytes necessary,
3332 * adding single bytes as needed */
3333 if (!tcc_state
->ms_bitfields
) {
3335 /* minimum bytes for new bitfield */
3336 size
= (bit_size
+ 7) / 8;
3338 /* enough spare bits already allocated? */
3339 bit_size
= (lbit_pos
- 1) % 8 + 1 + bit_size
;
3340 if (bit_size
> 8) /* doesn't fit */
3341 extra_bytes
= (bit_size
- 1) / 8;
3349 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3350 /* add new memory data only if starting bit
3351 field or adding bytes to existing bit field */
3352 if (extra_bytes
) c
+= extra_bytes
;
3353 else if (lbit_pos
== 0) {
3354 if (a
== TOK_STRUCT
) {
3355 c
= (c
+ align
- 1) & -align
;
3364 if (align
> maxalign
)
3368 printf("add field %s offset=%d",
3369 get_tok_str(v
, NULL
), offset
);
3370 if (type1
.t
& VT_BITFIELD
) {
3371 printf(" pos=%d size=%d",
3372 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3373 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3378 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3380 while ((ass
= ass
->next
) != NULL
) {
3381 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3386 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3390 if (tok
== ';' || tok
== TOK_EOF
)
3397 /* store size and alignment */
3398 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3404 /* return 1 if basic type is a type size (short, long, long long) */
3405 ST_FUNC
int is_btype_size(int bt
)
3407 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3410 /* Add type qualifiers to a type. If the type is an array then the qualifiers
3411 are added to the element type, copied because it could be a typedef. */
3412 static void parse_btype_qualify(CType
*type
, int qualifiers
)
3414 while (type
->t
& VT_ARRAY
) {
3415 type
->ref
= sym_push(SYM_FIELD
, &type
->ref
->type
, 0, type
->ref
->c
);
3416 type
= &type
->ref
->type
;
3418 type
->t
|= qualifiers
;
3421 /* return 0 if no type declaration. otherwise, return the basic type
3424 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3426 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3430 memset(ad
, 0, sizeof(AttributeDef
));
3438 /* currently, we really ignore extension */
3449 tcc_error("too many basic types");
3451 bt_size
= is_btype_size (u
& VT_BTYPE
);
3452 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3467 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3468 #ifndef TCC_TARGET_PE
3469 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3471 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3472 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3478 #ifdef TCC_TARGET_ARM64
3480 /* GCC's __uint128_t appears in some Linux header files. Make it a
3481 synonym for long double to get the size and alignment right. */
3493 if ((t
& VT_BTYPE
) == VT_LONG
) {
3494 #ifdef TCC_TARGET_PE
3495 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3497 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3505 struct_decl(&type1
, ad
, VT_ENUM
);
3508 type
->ref
= type1
.ref
;
3512 struct_decl(&type1
, ad
, VT_STRUCT
);
3515 /* type modifiers */
3520 parse_btype_qualify(type
, VT_CONSTANT
);
3528 parse_btype_qualify(type
, VT_VOLATILE
);
3535 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3536 tcc_error("signed and unsigned modifier");
3549 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3550 tcc_error("signed and unsigned modifier");
3551 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3576 /* GNUC attribute */
3577 case TOK_ATTRIBUTE1
:
3578 case TOK_ATTRIBUTE2
:
3579 parse_attribute(ad
);
3582 t
= (t
& ~VT_BTYPE
) | u
;
3590 parse_expr_type(&type1
);
3591 /* remove all storage modifiers except typedef */
3592 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3598 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3601 type
->t
= ((s
->type
.t
& ~VT_TYPEDEF
) |
3602 (t
& ~(VT_CONSTANT
| VT_VOLATILE
)));
3603 type
->ref
= s
->type
.ref
;
3604 if (t
& (VT_CONSTANT
| VT_VOLATILE
))
3605 parse_btype_qualify(type
, t
& (VT_CONSTANT
| VT_VOLATILE
));
3609 /* get attributes from typedef */
3610 if (0 == ad
->a
.aligned
)
3611 ad
->a
.aligned
= s
->a
.aligned
;
3612 if (0 == ad
->a
.func_call
)
3613 ad
->a
.func_call
= s
->a
.func_call
;
3614 ad
->a
.packed
|= s
->a
.packed
;
3623 if (tcc_state
->char_is_unsigned
) {
3624 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3628 /* long is never used as type */
3629 if ((t
& VT_BTYPE
) == VT_LONG
)
3630 #if (!defined TCC_TARGET_X86_64 && !defined TCC_TARGET_ARM64) || \
3631 defined TCC_TARGET_PE
3632 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3634 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3640 /* convert a function parameter type (array to pointer and function to
3641 function pointer) */
3642 static inline void convert_parameter_type(CType
*pt
)
3644 /* remove const and volatile qualifiers (XXX: const could be used
3645 to indicate a const function parameter */
3646 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3647 /* array must be transformed to pointer according to ANSI C */
3649 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3654 ST_FUNC
void parse_asm_str(CString
*astr
)
3657 /* read the string */
3659 expect("string constant");
3661 while (tok
== TOK_STR
) {
3662 /* XXX: add \0 handling too ? */
3663 cstr_cat(astr
, tokc
.str
.data
, -1);
3666 cstr_ccat(astr
, '\0');
3669 /* Parse an asm label and return the token */
3670 static int asm_label_instr(void)
3676 parse_asm_str(&astr
);
3679 printf("asm_alias: \"%s\"\n", (char *)astr
.data
);
3681 v
= tok_alloc(astr
.data
, astr
.size
- 1)->tok
;
3686 static void post_type(CType
*type
, AttributeDef
*ad
)
3688 int n
, l
, t1
, arg_size
, align
;
3689 Sym
**plast
, *s
, *first
;
3694 /* function declaration */
3702 /* read param name and compute offset */
3703 if (l
!= FUNC_OLD
) {
3704 if (!parse_btype(&pt
, &ad1
)) {
3706 tcc_error("invalid type");
3713 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3715 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3716 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3717 tcc_error("parameter declared as void");
3718 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3723 expect("identifier");
3727 convert_parameter_type(&pt
);
3728 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3734 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3741 /* if no parameters, then old type prototype */
3745 /* NOTE: const is ignored in returned type as it has a special
3746 meaning in gcc / C++ */
3747 type
->t
&= ~VT_CONSTANT
;
3748 /* some ancient pre-K&R C allows a function to return an array
3749 and the array brackets to be put after the arguments, such
3750 that "int c()[]" means something like "int[] c()" */
3753 skip(']'); /* only handle simple "[]" */
3756 /* we push a anonymous symbol which will contain the function prototype */
3757 ad
->a
.func_args
= arg_size
;
3758 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3763 } else if (tok
== '[') {
3764 /* array definition */
3766 if (tok
== TOK_RESTRICT1
)
3771 if (!local_stack
|| nocode_wanted
)
3772 vpushi(expr_const());
3774 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3777 tcc_error("invalid array size");
3779 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3780 tcc_error("size of variable length array should be an integer");
3785 /* parse next post type */
3786 post_type(type
, ad
);
3787 if (type
->t
== VT_FUNC
)
3788 tcc_error("declaration of an array of functions");
3789 t1
|= type
->t
& VT_VLA
;
3792 loc
-= type_size(&int_type
, &align
);
3796 vla_runtime_type_size(type
, &align
);
3798 vset(&int_type
, VT_LOCAL
|VT_LVAL
, n
);
3805 /* we push an anonymous symbol which will contain the array
3807 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3808 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3813 /* Parse a type declaration (except basic type), and return the type
3814 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3815 expected. 'type' should contain the basic type. 'ad' is the
3816 attribute definition of the basic type. It can be modified by
3819 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3822 CType type1
, *type2
;
3823 int qualifiers
, storage
;
3825 while (tok
== '*') {
3833 qualifiers
|= VT_CONSTANT
;
3838 qualifiers
|= VT_VOLATILE
;
3846 type
->t
|= qualifiers
;
3849 /* XXX: clarify attribute handling */
3850 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3851 parse_attribute(ad
);
3853 /* recursive type */
3854 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3855 type1
.t
= 0; /* XXX: same as int */
3858 /* XXX: this is not correct to modify 'ad' at this point, but
3859 the syntax is not clear */
3860 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3861 parse_attribute(ad
);
3862 type_decl(&type1
, ad
, v
, td
);
3865 /* type identifier */
3866 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3870 if (!(td
& TYPE_ABSTRACT
))
3871 expect("identifier");
3875 storage
= type
->t
& VT_STORAGE
;
3876 type
->t
&= ~VT_STORAGE
;
3877 if (storage
& VT_STATIC
) {
3878 int saved_nocode_wanted
= nocode_wanted
;
3880 post_type(type
, ad
);
3881 nocode_wanted
= saved_nocode_wanted
;
3883 post_type(type
, ad
);
3885 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3886 parse_attribute(ad
);
3890 /* append type at the end of type1 */
3903 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3904 ST_FUNC
int lvalue_type(int t
)
3909 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3911 else if (bt
== VT_SHORT
)
3915 if (t
& VT_UNSIGNED
)
3916 r
|= VT_LVAL_UNSIGNED
;
3920 /* indirection with full error checking and bound check */
3921 ST_FUNC
void indir(void)
3923 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3924 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3928 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3930 vtop
->type
= *pointed_type(&vtop
->type
);
3931 /* Arrays and functions are never lvalues */
3932 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3933 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3934 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3935 /* if bound checking, the referenced pointer must be checked */
3936 #ifdef CONFIG_TCC_BCHECK
3937 if (tcc_state
->do_bounds_check
)
3938 vtop
->r
|= VT_MUSTBOUND
;
3943 /* pass a parameter to a function and do type checking and casting */
3944 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3949 func_type
= func
->c
;
3950 if (func_type
== FUNC_OLD
||
3951 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3952 /* default casting : only need to convert float to double */
3953 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3956 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3957 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3960 } else if (arg
== NULL
) {
3961 tcc_error("too many arguments to function");
3964 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3965 gen_assign_cast(&type
);
3969 /* parse an expression of the form '(type)' or '(expr)' and return its
3971 static void parse_expr_type(CType
*type
)
3977 if (parse_btype(type
, &ad
)) {
3978 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3985 static void parse_type(CType
*type
)
3990 if (!parse_btype(type
, &ad
)) {
3993 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3996 static void vpush_tokc(int t
)
4001 vsetc(&type
, VT_CONST
, &tokc
);
4004 ST_FUNC
void unary(void)
4006 int n
, t
, align
, size
, r
, sizeof_caller
;
4011 sizeof_caller
= in_sizeof
;
4013 /* XXX: GCC 2.95.3 does not generate a table although it should be
4027 vpush_tokc(VT_INT
| VT_UNSIGNED
);
4031 vpush_tokc(VT_LLONG
);
4035 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
4039 vpush_tokc(VT_FLOAT
);
4043 vpush_tokc(VT_DOUBLE
);
4047 vpush_tokc(VT_LDOUBLE
);
4050 case TOK___FUNCTION__
:
4052 goto tok_identifier
;
4058 /* special function name identifier */
4059 len
= strlen(funcname
) + 1;
4060 /* generate char[len] type */
4065 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
4066 ptr
= section_ptr_add(data_section
, len
);
4067 memcpy(ptr
, funcname
, len
);
4072 #ifdef TCC_TARGET_PE
4073 t
= VT_SHORT
| VT_UNSIGNED
;
4079 /* string parsing */
4082 if (tcc_state
->warn_write_strings
)
4087 memset(&ad
, 0, sizeof(AttributeDef
));
4088 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
4093 if (parse_btype(&type
, &ad
)) {
4094 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
4096 /* check ISOC99 compound literal */
4098 /* data is allocated locally by default */
4103 /* all except arrays are lvalues */
4104 if (!(type
.t
& VT_ARRAY
))
4105 r
|= lvalue_type(type
.t
);
4106 memset(&ad
, 0, sizeof(AttributeDef
));
4107 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
4109 if (sizeof_caller
) {
4116 } else if (tok
== '{') {
4118 tcc_error("expected constant");
4119 /* save all registers */
4122 /* statement expression : we do not accept break/continue
4123 inside as GCC does */
4124 block(NULL
, NULL
, 1);
4139 /* functions names must be treated as function pointers,
4140 except for unary '&' and sizeof. Since we consider that
4141 functions are not lvalues, we only have to handle it
4142 there and in function calls. */
4143 /* arrays can also be used although they are not lvalues */
4144 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
4145 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
4147 mk_pointer(&vtop
->type
);
4153 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4155 boolean
.t
= VT_BOOL
;
4157 vtop
->c
.i
= !vtop
->c
.i
;
4158 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
4162 vseti(VT_JMP
, gvtst(1, 0));
4174 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
4175 tcc_error("pointer not accepted for unary plus");
4176 /* In order to force cast, we add zero, except for floating point
4177 where we really need an noop (otherwise -0.0 will be transformed
4179 if (!is_float(vtop
->type
.t
)) {
4190 unary_type(&type
); // Perform a in_sizeof = 0;
4191 size
= type_size(&type
, &align
);
4192 if (t
== TOK_SIZEOF
) {
4193 if (!(type
.t
& VT_VLA
)) {
4195 tcc_error("sizeof applied to an incomplete type");
4198 vla_runtime_type_size(&type
, &align
);
4203 vtop
->type
.t
|= VT_UNSIGNED
;
4206 case TOK_builtin_expect
:
4208 /* __builtin_expect is a no-op for now */
4209 int saved_nocode_wanted
;
4214 saved_nocode_wanted
= nocode_wanted
;
4218 nocode_wanted
= saved_nocode_wanted
;
4222 case TOK_builtin_types_compatible_p
:
4231 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4232 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4233 vpushi(is_compatible_types(&type1
, &type2
));
4236 case TOK_builtin_constant_p
:
4238 int saved_nocode_wanted
, res
;
4241 saved_nocode_wanted
= nocode_wanted
;
4244 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
4246 nocode_wanted
= saved_nocode_wanted
;
4251 case TOK_builtin_frame_address
:
4252 case TOK_builtin_return_address
:
4259 if (tok
!= TOK_CINT
) {
4260 tcc_error("%s only takes positive integers",
4261 tok1
== TOK_builtin_return_address
?
4262 "__builtin_return_address" :
4263 "__builtin_frame_address");
4265 level
= (uint32_t)tokc
.i
;
4270 vset(&type
, VT_LOCAL
, 0); /* local frame */
4272 mk_pointer(&vtop
->type
);
4273 indir(); /* -> parent frame */
4275 if (tok1
== TOK_builtin_return_address
) {
4276 // assume return address is just above frame pointer on stack
4279 mk_pointer(&vtop
->type
);
4284 #ifdef TCC_TARGET_X86_64
4285 #ifdef TCC_TARGET_PE
4286 case TOK_builtin_va_start
:
4294 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4295 tcc_error("__builtin_va_start expects a local variable");
4296 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
4297 vtop
->type
= char_pointer_type
;
4303 case TOK_builtin_va_arg_types
:
4310 vpushi(classify_x86_64_va_arg(&type
));
4316 #ifdef TCC_TARGET_ARM64
4317 case TOK___va_start
: {
4319 tcc_error("statement in global scope");
4329 vtop
->type
.t
= VT_VOID
;
4332 case TOK___va_arg
: {
4335 tcc_error("statement in global scope");
4347 case TOK___arm64_clear_cache
: {
4356 vtop
->type
.t
= VT_VOID
;
4360 /* pre operations */
4371 t
= vtop
->type
.t
& VT_BTYPE
;
4373 /* In IEEE negate(x) isn't subtract(0,x), but rather
4378 else if (t
== VT_DOUBLE
)
4389 goto tok_identifier
;
4391 /* allow to take the address of a label */
4392 if (tok
< TOK_UIDENT
)
4393 expect("label identifier");
4394 s
= label_find(tok
);
4396 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4398 if (s
->r
== LABEL_DECLARED
)
4399 s
->r
= LABEL_FORWARD
;
4402 s
->type
.t
= VT_VOID
;
4403 mk_pointer(&s
->type
);
4404 s
->type
.t
|= VT_STATIC
;
4406 vpushsym(&s
->type
, s
);
4410 // special qnan , snan and infinity values
4412 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
4416 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
4420 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
4429 expect("identifier");
4432 const char *name
= get_tok_str(t
, NULL
);
4434 tcc_error("'%s' undeclared", name
);
4435 /* for simple function calls, we tolerate undeclared
4436 external reference to int() function */
4437 if (tcc_state
->warn_implicit_function_declaration
4438 #ifdef TCC_TARGET_PE
4439 /* people must be warned about using undeclared WINAPI functions
4440 (which usually start with uppercase letter) */
4441 || (name
[0] >= 'A' && name
[0] <= 'Z')
4444 tcc_warning("implicit declaration of function '%s'", name
);
4445 s
= external_global_sym(t
, &func_old_type
, 0);
4447 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
4448 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
4449 /* if referencing an inline function, then we generate a
4450 symbol to it if not already done. It will have the
4451 effect to generate code for it at the end of the
4452 compilation unit. Inline function as always
4453 generated in the text section. */
4455 put_extern_sym(s
, text_section
, 0, 0);
4456 r
= VT_SYM
| VT_CONST
;
4460 vset(&s
->type
, r
, s
->c
);
4461 /* if forward reference, we must point to s */
4462 if (vtop
->r
& VT_SYM
) {
4469 /* post operations */
4471 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4474 } else if (tok
== '.' || tok
== TOK_ARROW
|| tok
== TOK_CDOUBLE
) {
4477 if (tok
== TOK_ARROW
)
4479 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4482 /* expect pointer on structure */
4483 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4484 expect("struct or union");
4485 if (tok
== TOK_CDOUBLE
)
4486 expect("field name");
4488 if (tok
== TOK_CINT
|| tok
== TOK_CUINT
)
4489 expect("field name");
4493 while ((s
= s
->next
) != NULL
) {
4498 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, &tokc
));
4499 /* add field offset to pointer */
4500 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4503 /* change type to field type, and set to lvalue */
4504 vtop
->type
= s
->type
;
4505 vtop
->type
.t
|= qualifiers
;
4506 /* an array is never an lvalue */
4507 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4508 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4509 #ifdef CONFIG_TCC_BCHECK
4510 /* if bound checking, the referenced pointer must be checked */
4511 if (tcc_state
->do_bounds_check
&& (vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4512 vtop
->r
|= VT_MUSTBOUND
;
4516 } else if (tok
== '[') {
4522 } else if (tok
== '(') {
4525 int nb_args
, ret_nregs
, ret_align
, regsize
, variadic
;
4528 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4529 /* pointer test (no array accepted) */
4530 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4531 vtop
->type
= *pointed_type(&vtop
->type
);
4532 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4536 expect("function pointer");
4539 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4541 /* get return type */
4544 sa
= s
->next
; /* first parameter */
4547 /* compute first implicit argument if a structure is returned */
4548 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4549 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4550 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4551 &ret_align
, ®size
);
4553 /* get some space for the returned structure */
4554 size
= type_size(&s
->type
, &align
);
4555 #ifdef TCC_TARGET_ARM64
4556 /* On arm64, a small struct is return in registers.
4557 It is much easier to write it to memory if we know
4558 that we are allowed to write some extra bytes, so
4559 round the allocated space up to a power of 2: */
4561 while (size
& (size
- 1))
4562 size
= (size
| (size
- 1)) + 1;
4564 loc
= (loc
- size
) & -align
;
4566 ret
.r
= VT_LOCAL
| VT_LVAL
;
4567 /* pass it as 'int' to avoid structure arg passing
4569 vseti(VT_LOCAL
, loc
);
4579 /* return in register */
4580 if (is_float(ret
.type
.t
)) {
4581 ret
.r
= reg_fret(ret
.type
.t
);
4582 #ifdef TCC_TARGET_X86_64
4583 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4587 #ifndef TCC_TARGET_ARM64
4588 #ifdef TCC_TARGET_X86_64
4589 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4591 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4602 gfunc_param_typed(s
, sa
);
4612 tcc_error("too few arguments to function");
4614 if (!nocode_wanted
) {
4615 gfunc_call(nb_args
);
4617 vtop
-= (nb_args
+ 1);
4621 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4622 vsetc(&ret
.type
, r
, &ret
.c
);
4623 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4626 /* handle packed struct return */
4627 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4630 size
= type_size(&s
->type
, &align
);
4631 /* We're writing whole regs often, make sure there's enough
4632 space. Assume register size is power of 2. */
4633 if (regsize
> align
)
4635 loc
= (loc
- size
) & -align
;
4639 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4643 if (--ret_nregs
== 0)
4647 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4655 ST_FUNC
void expr_prod(void)
4660 while (tok
== '*' || tok
== '/' || tok
== '%') {
4668 ST_FUNC
void expr_sum(void)
4673 while (tok
== '+' || tok
== '-') {
4681 static void expr_shift(void)
4686 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4694 static void expr_cmp(void)
4699 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4700 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4708 static void expr_cmpeq(void)
4713 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4721 static void expr_and(void)
4724 while (tok
== '&') {
4731 static void expr_xor(void)
4734 while (tok
== '^') {
4741 static void expr_or(void)
4744 while (tok
== '|') {
4751 /* XXX: fix this mess */
4752 static void expr_land_const(void)
4755 while (tok
== TOK_LAND
) {
4761 static void expr_lor_const(void)
4764 while (tok
== TOK_LOR
) {
4771 static void expr_land(void)
4774 if (tok
== TOK_LAND
) {
4775 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4786 int saved_nocode_wanted
= nocode_wanted
;
4790 nocode_wanted
= saved_nocode_wanted
;
4798 if (tok
!= TOK_LAND
) {
4809 static void expr_lor(void)
4812 if (tok
== TOK_LOR
) {
4813 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4820 int saved_nocode_wanted
= nocode_wanted
;
4824 nocode_wanted
= saved_nocode_wanted
;
4836 if (tok
!= TOK_LOR
) {
4847 static void expr_cond(void)
4849 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
, islv
;
4851 CType type
, type1
, type2
;
4856 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4857 int saved_nocode_wanted
= nocode_wanted
;
4860 boolean
.t
= VT_BOOL
;
4866 if (tok
!= ':' || !gnu_ext
) {
4874 nocode_wanted
= saved_nocode_wanted
;
4877 if (tok
!= ':' || !gnu_ext
) {
4881 nocode_wanted
= saved_nocode_wanted
;
4888 if (vtop
!= vstack
) {
4889 /* needed to avoid having different registers saved in
4891 if (is_float(vtop
->type
.t
)) {
4893 #ifdef TCC_TARGET_X86_64
4894 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4904 if (tok
== ':' && gnu_ext
) {
4912 sv
= *vtop
; /* save value to handle it later */
4913 vtop
--; /* no vpop so that FP stack is not flushed */
4921 bt1
= t1
& VT_BTYPE
;
4923 bt2
= t2
& VT_BTYPE
;
4924 /* cast operands to correct type according to ISOC rules */
4925 if (is_float(bt1
) || is_float(bt2
)) {
4926 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4927 type
.t
= VT_LDOUBLE
;
4928 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4933 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4934 /* cast to biggest op */
4936 /* convert to unsigned if it does not fit in a long long */
4937 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4938 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4939 type
.t
|= VT_UNSIGNED
;
4940 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4941 /* If one is a null ptr constant the result type
4943 if (is_null_pointer (vtop
))
4945 else if (is_null_pointer (&sv
))
4947 /* XXX: test pointer compatibility, C99 has more elaborate
4951 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4952 /* XXX: test function pointer compatibility */
4953 type
= bt1
== VT_FUNC
? type1
: type2
;
4954 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4955 /* XXX: test structure compatibility */
4956 type
= bt1
== VT_STRUCT
? type1
: type2
;
4957 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4958 /* NOTE: as an extension, we accept void on only one side */
4961 /* integer operations */
4963 /* convert to unsigned if it does not fit in an integer */
4964 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4965 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4966 type
.t
|= VT_UNSIGNED
;
4968 /* keep structs lvalue by transforming `(expr ? a : b)` to `*(expr ? &a : &b)` so
4969 that `(expr ? a : b).mem` does not error with "lvalue expected" */
4970 islv
= (vtop
->r
& VT_LVAL
) && (sv
.r
& VT_LVAL
) && VT_STRUCT
== (type
.t
& VT_BTYPE
);
4972 /* now we convert second operand */
4975 mk_pointer(&vtop
->type
);
4978 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4981 if (is_float(type
.t
)) {
4983 #ifdef TCC_TARGET_X86_64
4984 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4988 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4989 /* for long longs, we use fixed registers to avoid having
4990 to handle a complicated move */
4995 /* this is horrible, but we must also convert first
4999 /* put again first value and cast it */
5003 mk_pointer(&vtop
->type
);
5006 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
5009 move_reg(r2
, r1
, type
.t
);
5018 static void expr_eq(void)
5024 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
5025 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
5026 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
5041 ST_FUNC
void gexpr(void)
5052 /* parse an expression and return its type without any side effect. */
5053 static void expr_type(CType
*type
)
5055 int saved_nocode_wanted
;
5057 saved_nocode_wanted
= nocode_wanted
;
5062 nocode_wanted
= saved_nocode_wanted
;
5065 /* parse a unary expression and return its type without any side
5067 static void unary_type(CType
*type
)
5079 /* parse a constant expression and return value in vtop. */
5080 static void expr_const1(void)
5089 /* parse an integer constant and return its value. */
5090 ST_FUNC
int expr_const(void)
5094 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
5095 expect("constant expression");
5101 /* return the label token if current token is a label, otherwise
5103 static int is_label(void)
5107 /* fast test first */
5108 if (tok
< TOK_UIDENT
)
5110 /* no need to save tokc because tok is an identifier */
5117 unget_tok(last_tok
);
5122 static void label_or_decl(int l
)
5126 /* fast test first */
5127 if (tok
>= TOK_UIDENT
)
5129 /* no need to save tokc because tok is an identifier */
5133 unget_tok(last_tok
);
5136 unget_tok(last_tok
);
5141 static int case_cmp(const void *pa
, const void *pb
)
5143 int a
= (*(struct case_t
**) pa
)->v1
;
5144 int b
= (*(struct case_t
**) pb
)->v1
;
5145 return a
< b
? -1 : a
> b
;
5148 static int gcase(struct case_t
**base
, int len
, int case_reg
, int *bsym
)
5160 case_reg
= gv(RC_INT
);
5166 gtst_addr(0, p
->sym
); /* v1 <= x <= v2 */
5167 case_reg
= gv(RC_INT
);
5170 case_reg
= gcase(base
, len
/2, case_reg
, bsym
);
5171 if (cur_switch
->def_sym
)
5172 gjmp_addr(cur_switch
->def_sym
);
5174 *bsym
= gjmp(*bsym
);
5178 base
+= e
; len
-= e
;
5186 if (p
->v1
== p
->v2
) {
5188 gtst_addr(0, p
->sym
);
5192 case_reg
= gv(RC_INT
);
5198 gtst_addr(0, p
->sym
);
5201 case_reg
= gv(RC_INT
);
5207 static void block(int *bsym
, int *csym
, int is_expr
)
5212 /* generate line number info */
5213 if (tcc_state
->do_debug
&&
5214 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
5215 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
5217 last_line_num
= file
->line_num
;
5221 /* default return value is (void) */
5223 vtop
->type
.t
= VT_VOID
;
5226 if (tok
== TOK_IF
) {
5233 block(bsym
, csym
, 0);
5235 if (c
== TOK_ELSE
) {
5239 block(bsym
, csym
, 0);
5240 gsym(d
); /* patch else jmp */
5243 } else if (tok
== TOK_WHILE
) {
5259 } else if (tok
== '{') {
5261 int block_vla_sp_loc
= vla_sp_loc
, saved_vlas_in_scope
= vlas_in_scope
;
5264 /* record local declaration stack position */
5266 llabel
= local_label_stack
;
5269 /* handle local labels declarations */
5270 if (tok
== TOK_LABEL
) {
5273 if (tok
< TOK_UIDENT
)
5274 expect("label identifier");
5275 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
5285 while (tok
!= '}') {
5286 label_or_decl(VT_LOCAL
);
5290 block(bsym
, csym
, is_expr
);
5293 /* pop locally defined labels */
5294 label_pop(&local_label_stack
, llabel
);
5296 /* XXX: this solution makes only valgrind happy...
5297 triggered by gcc.c-torture/execute/20000917-1.c */
5299 switch(vtop
->type
.t
& VT_BTYPE
) {
5301 /* this breaks a compilation of the linux kernel v2.4.26 */
5302 /* pmd_t *new = ({ __asm__ __volatile__("ud2\n") ; ((pmd_t *)1); }); */
5303 /* Look a commit a80acab: Display error on statement expressions with complex return type */
5304 /* A pointer is not a complex return type */
5308 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
5310 tcc_error("unsupported expression type");
5313 /* pop locally defined symbols */
5315 sym_pop(&local_stack
, s
);
5317 /* Pop VLA frames and restore stack pointer if required */
5318 if (vlas_in_scope
> saved_vlas_in_scope
) {
5319 vla_sp_loc
= saved_vlas_in_scope
? block_vla_sp_loc
: vla_sp_root_loc
;
5322 vlas_in_scope
= saved_vlas_in_scope
;
5325 } else if (tok
== TOK_RETURN
) {
5329 gen_assign_cast(&func_vt
);
5330 #ifdef TCC_TARGET_ARM64
5331 // Perhaps it would be better to use this for all backends:
5334 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
5335 CType type
, ret_type
;
5336 int ret_align
, ret_nregs
, regsize
;
5337 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
5338 &ret_align
, ®size
);
5339 if (0 == ret_nregs
) {
5340 /* if returning structure, must copy it to implicit
5341 first pointer arg location */
5344 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
5347 /* copy structure value to pointer */
5350 /* returning structure packed into registers */
5351 int r
, size
, addr
, align
;
5352 size
= type_size(&func_vt
,&align
);
5353 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) ||
5354 (vtop
->c
.i
& (ret_align
-1)))
5355 && (align
& (ret_align
-1))) {
5356 loc
= (loc
- size
) & -ret_align
;
5359 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
5363 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
5365 vtop
->type
= ret_type
;
5366 if (is_float(ret_type
.t
))
5367 r
= rc_fret(ret_type
.t
);
5378 if (--ret_nregs
== 0)
5380 /* We assume that when a structure is returned in multiple
5381 registers, their classes are consecutive values of the
5384 vtop
->c
.i
+= regsize
;
5388 } else if (is_float(func_vt
.t
)) {
5389 gv(rc_fret(func_vt
.t
));
5394 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
5397 /* jump unless last stmt in top-level block */
5398 if (tok
!= '}' || local_scope
!= 1)
5400 } else if (tok
== TOK_BREAK
) {
5403 tcc_error("cannot break");
5404 *bsym
= gjmp(*bsym
);
5407 } else if (tok
== TOK_CONTINUE
) {
5410 tcc_error("cannot continue");
5411 vla_sp_restore_root();
5412 *csym
= gjmp(*csym
);
5415 } else if (tok
== TOK_FOR
) {
5422 /* c99 for-loop init decl? */
5423 if (!decl0(VT_LOCAL
, 1)) {
5424 /* no, regular for-loop init expr */
5456 sym_pop(&local_stack
, s
);
5459 if (tok
== TOK_DO
) {
5476 if (tok
== TOK_SWITCH
) {
5477 struct switch_t
*saved
, sw
;
5481 /* XXX: other types than integer */
5486 b
= gjmp(0); /* jump to first case */
5487 sw
.p
= NULL
; sw
.n
= 0; sw
.def_sym
= 0;
5491 a
= gjmp(a
); /* add implicit break */
5494 qsort(sw
.p
, sw
.n
, sizeof(void*), case_cmp
);
5495 for (b
= 1; b
< sw
.n
; b
++)
5496 if (sw
.p
[b
- 1]->v2
>= sw
.p
[b
]->v1
)
5497 tcc_error("duplicate case value");
5498 gcase(sw
.p
, sw
.n
, c
, &a
);
5500 gjmp_addr(sw
.def_sym
);
5501 dynarray_reset(&sw
.p
, &sw
.n
);
5506 if (tok
== TOK_CASE
) {
5507 struct case_t
*cr
= tcc_malloc(sizeof(struct case_t
));
5511 cr
->v1
= cr
->v2
= expr_const();
5512 if (gnu_ext
&& tok
== TOK_DOTS
) {
5514 cr
->v2
= expr_const();
5515 if (cr
->v2
< cr
->v1
)
5516 tcc_warning("empty case range");
5519 dynarray_add((void***) &cur_switch
->p
, &cur_switch
->n
, cr
);
5522 goto block_after_label
;
5524 if (tok
== TOK_DEFAULT
) {
5529 if (cur_switch
->def_sym
)
5530 tcc_error("too many 'default'");
5531 cur_switch
->def_sym
= ind
;
5533 goto block_after_label
;
5535 if (tok
== TOK_GOTO
) {
5537 if (tok
== '*' && gnu_ext
) {
5541 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
5544 } else if (tok
>= TOK_UIDENT
) {
5545 s
= label_find(tok
);
5546 /* put forward definition if needed */
5548 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
5550 if (s
->r
== LABEL_DECLARED
)
5551 s
->r
= LABEL_FORWARD
;
5553 vla_sp_restore_root();
5554 if (s
->r
& LABEL_FORWARD
)
5555 s
->jnext
= gjmp(s
->jnext
);
5557 gjmp_addr(s
->jnext
);
5560 expect("label identifier");
5563 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
5571 if (s
->r
== LABEL_DEFINED
)
5572 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
5574 s
->r
= LABEL_DEFINED
;
5576 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
5580 /* we accept this, but it is a mistake */
5583 tcc_warning("deprecated use of label at end of compound statement");
5587 block(bsym
, csym
, is_expr
);
5590 /* expression case */
5605 /* t is the array or struct type. c is the array or struct
5606 address. cur_index/cur_field is the pointer to the current
5607 value. 'size_only' is true if only size info is needed (only used
5609 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5610 int *cur_index
, Sym
**cur_field
,
5614 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5620 if (gnu_ext
&& (l
= is_label()) != 0)
5622 while (tok
== '[' || tok
== '.') {
5624 if (!(type
->t
& VT_ARRAY
))
5625 expect("array type");
5628 index
= expr_const();
5629 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5630 expect("invalid index");
5631 if (tok
== TOK_DOTS
&& gnu_ext
) {
5633 index_last
= expr_const();
5634 if (index_last
< 0 ||
5635 (s
->c
>= 0 && index_last
>= s
->c
) ||
5637 expect("invalid index");
5643 *cur_index
= index_last
;
5644 type
= pointed_type(type
);
5645 elem_size
= type_size(type
, &align
);
5646 c
+= index
* elem_size
;
5647 /* NOTE: we only support ranges for last designator */
5648 nb_elems
= index_last
- index
+ 1;
5649 if (nb_elems
!= 1) {
5658 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5659 expect("struct/union type");
5672 /* XXX: fix this mess by using explicit storage field */
5674 type1
.t
|= (type
->t
& ~VT_TYPE
);
5688 if (type
->t
& VT_ARRAY
) {
5690 type
= pointed_type(type
);
5691 c
+= index
* type_size(type
, &align
);
5695 tcc_error("too many field init");
5696 /* XXX: fix this mess by using explicit storage field */
5698 type1
.t
|= (type
->t
& ~VT_TYPE
);
5703 decl_initializer(type
, sec
, c
, 0, size_only
);
5705 /* XXX: make it more general */
5706 if (!size_only
&& nb_elems
> 1) {
5707 unsigned long c_end
;
5712 tcc_error("range init not supported yet for dynamic storage");
5713 c_end
= c
+ nb_elems
* elem_size
;
5714 if (c_end
> sec
->data_allocated
)
5715 section_realloc(sec
, c_end
);
5716 src
= sec
->data
+ c
;
5718 for(i
= 1; i
< nb_elems
; i
++) {
5720 memcpy(dst
, src
, elem_size
);
5726 #define EXPR_CONST 1
5729 /* store a value or an expression directly in global data or in local array */
5730 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5731 int v
, int expr_type
)
5733 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5735 unsigned long long bit_mask
;
5743 /* compound literals must be allocated globally in this case */
5744 saved_global_expr
= global_expr
;
5747 global_expr
= saved_global_expr
;
5748 /* NOTE: symbols are accepted */
5749 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5750 tcc_error("initializer element is not constant");
5758 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5761 /* XXX: not portable */
5762 /* XXX: generate error if incorrect relocation */
5763 gen_assign_cast(&dtype
);
5764 bt
= type
->t
& VT_BTYPE
;
5765 /* we'll write at most 16 bytes */
5766 if (c
+ 16 > sec
->data_allocated
) {
5767 section_realloc(sec
, c
+ 16);
5769 ptr
= sec
->data
+ c
;
5770 /* XXX: make code faster ? */
5771 if (!(type
->t
& VT_BITFIELD
)) {
5776 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5777 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5778 bit_mask
= (1LL << bit_size
) - 1;
5780 if ((vtop
->r
& VT_SYM
) &&
5786 (bt
== VT_INT
&& bit_size
!= 32)))
5787 tcc_error("initializer element is not computable at load time");
5789 /* XXX: when cross-compiling we assume that each type has the
5790 same representation on host and target, which is likely to
5791 be wrong in the case of long double */
5793 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5795 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5798 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5801 *(double *)ptr
= vtop
->c
.d
;
5804 if (sizeof(long double) == LDOUBLE_SIZE
)
5805 *(long double *)ptr
= vtop
->c
.ld
;
5806 else if (sizeof(double) == LDOUBLE_SIZE
)
5807 *(double *)ptr
= vtop
->c
.ld
;
5809 tcc_error("can't cross compile long double constants");
5812 *(long long *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5815 addr_t val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5816 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5817 if (vtop
->r
& VT_SYM
)
5818 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5820 *(addr_t
*)ptr
|= val
;
5822 if (vtop
->r
& VT_SYM
)
5823 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5824 *(addr_t
*)ptr
|= val
;
5829 int val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5830 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5831 if (vtop
->r
& VT_SYM
)
5832 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5836 if (vtop
->r
& VT_SYM
)
5837 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5845 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5852 /* put zeros for variable based init */
5853 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5856 /* nothing to do because globals are already set to zero */
5858 vpush_global_sym(&func_old_type
, TOK_memset
);
5860 #ifdef TCC_TARGET_ARM
5871 /* 't' contains the type and storage info. 'c' is the offset of the
5872 object in section 'sec'. If 'sec' is NULL, it means stack based
5873 allocation. 'first' is true if array '{' must be read (multi
5874 dimension implicit array init handling). 'size_only' is true if
5875 size only evaluation is wanted (only for arrays). */
5876 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5877 int first
, int size_only
)
5879 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5880 int size1
, align1
, expr_type
;
5884 if (type
->t
& VT_VLA
) {
5887 /* save current stack pointer */
5888 if (vlas_in_scope
== 0) {
5889 if (vla_sp_root_loc
== -1)
5890 vla_sp_root_loc
= (loc
-= PTR_SIZE
);
5891 gen_vla_sp_save(vla_sp_root_loc
);
5894 vla_runtime_type_size(type
, &a
);
5895 gen_vla_alloc(type
, a
);
5899 } else if (type
->t
& VT_ARRAY
) {
5903 t1
= pointed_type(type
);
5904 size1
= type_size(t1
, &align1
);
5907 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5910 tcc_error("character array initializer must be a literal,"
5911 " optionally enclosed in braces");
5916 /* only parse strings here if correct type (otherwise: handle
5917 them as ((w)char *) expressions */
5918 if ((tok
== TOK_LSTR
&&
5919 #ifdef TCC_TARGET_PE
5920 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5922 (t1
->t
& VT_BTYPE
) == VT_INT
5924 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5925 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5928 /* compute maximum number of chars wanted */
5930 cstr_len
= tokc
.str
.size
;
5932 cstr_len
= tokc
.str
.size
/ sizeof(nwchar_t
);
5935 if (n
>= 0 && nb
> (n
- array_length
))
5936 nb
= n
- array_length
;
5939 tcc_warning("initializer-string for array is too long");
5940 /* in order to go faster for common case (char
5941 string in global variable, we handle it
5943 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5944 memcpy(sec
->data
+ c
+ array_length
, tokc
.str
.data
, nb
);
5948 ch
= ((unsigned char *)tokc
.str
.data
)[i
];
5950 ch
= ((nwchar_t
*)tokc
.str
.data
)[i
];
5951 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5959 /* only add trailing zero if enough storage (no
5960 warning in this case since it is standard) */
5961 if (n
< 0 || array_length
< n
) {
5963 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5969 while (tok
!= '}') {
5970 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5971 if (n
>= 0 && index
>= n
)
5972 tcc_error("index too large");
5973 /* must put zero in holes (note that doing it that way
5974 ensures that it even works with designators) */
5975 if (!size_only
&& array_length
< index
) {
5976 init_putz(t1
, sec
, c
+ array_length
* size1
,
5977 (index
- array_length
) * size1
);
5980 if (index
> array_length
)
5981 array_length
= index
;
5982 /* special test for multi dimensional arrays (may not
5983 be strictly correct if designators are used at the
5985 if (index
>= n
&& no_oblock
)
5994 /* put zeros at the end */
5995 if (!size_only
&& n
>= 0 && array_length
< n
) {
5996 init_putz(t1
, sec
, c
+ array_length
* size1
,
5997 (n
- array_length
) * size1
);
5999 /* patch type size if needed */
6001 s
->c
= array_length
;
6002 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
6003 (sec
|| !first
|| tok
== '{')) {
6005 /* NOTE: the previous test is a specific case for automatic
6006 struct/union init */
6007 /* XXX: union needs only one init */
6014 if (tcc_state
->old_struct_init_code
) {
6015 /* an old version of struct initialization.
6016 It have a problems. But with a new version
6017 linux 2.4.26 can't load ramdisk.
6019 while (tok
== '(') {
6023 if (!parse_btype(&type1
, &ad1
))
6025 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6027 if (!is_assignable_types(type
, &type1
))
6028 tcc_error("invalid type for cast");
6035 if (!parse_btype(&type1
, &ad1
))
6037 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6039 if (!is_assignable_types(type
, &type1
))
6040 tcc_error("invalid type for cast");
6049 if (first
|| tok
== '{') {
6058 while (tok
!= '}') {
6059 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
6061 if (!size_only
&& array_length
< index
) {
6062 init_putz(type
, sec
, c
+ array_length
,
6063 index
- array_length
);
6065 index
= index
+ type_size(&f
->type
, &align1
);
6066 if (index
> array_length
)
6067 array_length
= index
;
6069 /* gr: skip fields from same union - ugly. */
6072 int f_size
= type_size(&f
->type
, &align
);
6073 int f_type
= (f
->type
.t
& VT_BTYPE
);
6075 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
6076 /* test for same offset */
6077 if (f
->next
->c
!= f
->c
)
6079 if ((f_type
== VT_STRUCT
) && (f_size
== 0)) {
6081 Lets assume a structure of size 0 can't be a member of the union.
6082 This allow to compile the following code from a linux kernel v2.4.26
6083 typedef struct { } rwlock_t;
6089 struct fs_struct init_fs = { { (1) }, (rwlock_t) {}, 0022, };
6090 tcc-0.9.23 can succesfully compile this version of the kernel.
6091 gcc don't have problems with this code too.
6095 /* if yes, test for bitfield shift */
6096 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
6097 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6098 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6099 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
6100 if (bit_pos_1
!= bit_pos_2
)
6107 if (no_oblock
&& f
== NULL
)
6113 /* put zeros at the end */
6114 if (!size_only
&& array_length
< n
) {
6115 init_putz(type
, sec
, c
+ array_length
,
6124 } else if (tok
== '{') {
6126 decl_initializer(type
, sec
, c
, first
, size_only
);
6128 } else if (size_only
) {
6129 /* just skip expression */
6130 parlevel
= parlevel1
= 0;
6131 while ((parlevel
> 0 || parlevel1
> 0 ||
6132 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
6135 else if (tok
== ')') {
6136 if (parlevel
== 0 && parlevel1
== 0)
6140 else if (tok
== '{')
6142 else if (tok
== '}') {
6143 if (parlevel
== 0 && parlevel1
== 0)
6150 /* currently, we always use constant expression for globals
6151 (may change for scripting case) */
6152 expr_type
= EXPR_CONST
;
6154 expr_type
= EXPR_ANY
;
6155 init_putv(type
, sec
, c
, 0, expr_type
);
6159 /* parse an initializer for type 't' if 'has_init' is non zero, and
6160 allocate space in local or global data space ('r' is either
6161 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
6162 variable 'v' of scope 'scope' is declared before initializers
6163 are parsed. If 'v' is zero, then a reference to the new object
6164 is put in the value stack. If 'has_init' is 2, a special parsing
6165 is done to handle string constants. */
6166 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
6167 int has_init
, int v
, int scope
)
6169 int size
, align
, addr
, data_offset
;
6171 ParseState saved_parse_state
= {0};
6172 TokenString
*init_str
= NULL
;
6174 Sym
*flexible_array
;
6176 flexible_array
= NULL
;
6177 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
6178 Sym
*field
= type
->ref
->next
;
6181 field
= field
->next
;
6182 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
6183 flexible_array
= field
;
6187 size
= type_size(type
, &align
);
6188 /* If unknown size, we must evaluate it before
6189 evaluating initializers because
6190 initializers can generate global data too
6191 (e.g. string pointers or ISOC99 compound
6192 literals). It also simplifies local
6193 initializers handling */
6194 if (size
< 0 || (flexible_array
&& has_init
)) {
6196 tcc_error("unknown type size");
6197 /* get all init string */
6198 init_str
= tok_str_alloc();
6199 if (has_init
== 2) {
6200 /* only get strings */
6201 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
6202 tok_str_add_tok(init_str
);
6207 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
6209 tcc_error("unexpected end of file in initializer");
6210 tok_str_add_tok(init_str
);
6213 else if (tok
== '}') {
6223 tok_str_add(init_str
, -1);
6224 tok_str_add(init_str
, 0);
6227 save_parse_state(&saved_parse_state
);
6229 begin_macro(init_str
, 1);
6231 decl_initializer(type
, NULL
, 0, 1, 1);
6232 /* prepare second initializer parsing */
6233 macro_ptr
= init_str
->str
;
6236 /* if still unknown size, error */
6237 size
= type_size(type
, &align
);
6239 tcc_error("unknown type size");
6241 /* If there's a flex member and it was used in the initializer
6243 if (flexible_array
&&
6244 flexible_array
->type
.ref
->c
> 0)
6245 size
+= flexible_array
->type
.ref
->c
6246 * pointed_size(&flexible_array
->type
);
6247 /* take into account specified alignment if bigger */
6248 if (ad
->a
.aligned
) {
6249 if (ad
->a
.aligned
> align
)
6250 align
= ad
->a
.aligned
;
6251 } else if (ad
->a
.packed
) {
6254 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
6256 #ifdef CONFIG_TCC_BCHECK
6257 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6261 loc
= (loc
- size
) & -align
;
6263 #ifdef CONFIG_TCC_BCHECK
6264 /* handles bounds */
6265 /* XXX: currently, since we do only one pass, we cannot track
6266 '&' operators, so we add only arrays */
6267 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6269 /* add padding between regions */
6271 /* then add local bound info */
6272 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(addr_t
));
6273 bounds_ptr
[0] = addr
;
6274 bounds_ptr
[1] = size
;
6278 /* local variable */
6279 sym_push(v
, type
, r
, addr
);
6281 /* push local reference */
6282 vset(type
, r
, addr
);
6288 if (v
&& scope
== VT_CONST
) {
6289 /* see if the symbol was already defined */
6292 if (!is_compatible_types(&sym
->type
, type
))
6293 tcc_error("incompatible types for redefinition of '%s'",
6294 get_tok_str(v
, NULL
));
6295 if (sym
->type
.t
& VT_EXTERN
) {
6296 /* if the variable is extern, it was not allocated */
6297 sym
->type
.t
&= ~VT_EXTERN
;
6298 /* set array size if it was omitted in extern
6300 if ((sym
->type
.t
& VT_ARRAY
) &&
6301 sym
->type
.ref
->c
< 0 &&
6303 sym
->type
.ref
->c
= type
->ref
->c
;
6305 /* we accept several definitions of the same
6306 global variable. this is tricky, because we
6307 must play with the SHN_COMMON type of the symbol */
6308 /* XXX: should check if the variable was already
6309 initialized. It is incorrect to initialized it
6311 /* no init data, we won't add more to the symbol */
6318 /* allocate symbol in corresponding section */
6323 else if (tcc_state
->nocommon
)
6327 data_offset
= sec
->data_offset
;
6328 data_offset
= (data_offset
+ align
- 1) & -align
;
6330 /* very important to increment global pointer at this time
6331 because initializers themselves can create new initializers */
6332 data_offset
+= size
;
6333 #ifdef CONFIG_TCC_BCHECK
6334 /* add padding if bound check */
6335 if (tcc_state
->do_bounds_check
)
6338 sec
->data_offset
= data_offset
;
6339 /* allocate section space to put the data */
6340 if (sec
->sh_type
!= SHT_NOBITS
&&
6341 data_offset
> sec
->data_allocated
)
6342 section_realloc(sec
, data_offset
);
6343 /* align section if needed */
6344 if (align
> sec
->sh_addralign
)
6345 sec
->sh_addralign
= align
;
6347 addr
= 0; /* avoid warning */
6351 if (scope
!= VT_CONST
|| !sym
) {
6352 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
6353 sym
->asm_label
= ad
->asm_label
;
6355 /* update symbol definition */
6357 put_extern_sym(sym
, sec
, addr
, size
);
6360 /* put a common area */
6361 put_extern_sym(sym
, NULL
, align
, size
);
6362 /* XXX: find a nicer way */
6363 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
6364 esym
->st_shndx
= SHN_COMMON
;
6367 /* push global reference */
6368 sym
= get_sym_ref(type
, sec
, addr
, size
);
6369 vpushsym(type
, sym
);
6371 /* patch symbol weakness */
6372 if (type
->t
& VT_WEAK
)
6374 apply_visibility(sym
, type
);
6375 #ifdef CONFIG_TCC_BCHECK
6376 /* handles bounds now because the symbol must be defined
6377 before for the relocation */
6378 if (tcc_state
->do_bounds_check
) {
6381 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
6382 /* then add global bound info */
6383 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(addr_t
));
6384 bounds_ptr
[0] = 0; /* relocated */
6385 bounds_ptr
[1] = size
;
6389 if (has_init
|| (type
->t
& VT_VLA
)) {
6390 decl_initializer(type
, sec
, addr
, 1, 0);
6391 /* patch flexible array member size back to -1, */
6392 /* for possible subsequent similar declarations */
6394 flexible_array
->type
.ref
->c
= -1;
6397 /* restore parse state if needed */
6400 restore_parse_state(&saved_parse_state
);
6404 static void put_func_debug(Sym
*sym
)
6409 /* XXX: we put here a dummy type */
6410 snprintf(buf
, sizeof(buf
), "%s:%c1",
6411 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
6412 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
6413 cur_text_section
, sym
->c
);
6414 /* //gr gdb wants a line at the function */
6415 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
6420 /* parse an old style function declaration list */
6421 /* XXX: check multiple parameter */
6422 static void func_decl_list(Sym
*func_sym
)
6429 /* parse each declaration */
6430 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
6431 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
6432 if (!parse_btype(&btype
, &ad
))
6433 expect("declaration list");
6434 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6435 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6437 /* we accept no variable after */
6441 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6442 /* find parameter in function parameter list */
6445 if ((s
->v
& ~SYM_FIELD
) == v
)
6449 tcc_error("declaration for parameter '%s' but no such parameter",
6450 get_tok_str(v
, NULL
));
6452 /* check that no storage specifier except 'register' was given */
6453 if (type
.t
& VT_STORAGE
)
6454 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
6455 convert_parameter_type(&type
);
6456 /* we can add the type (NOTE: it could be local to the function) */
6458 /* accept other parameters */
6469 /* parse a function defined by symbol 'sym' and generate its code in
6470 'cur_text_section' */
6471 static void gen_function(Sym
*sym
)
6473 int saved_nocode_wanted
= nocode_wanted
;
6476 ind
= cur_text_section
->data_offset
;
6477 /* NOTE: we patch the symbol size later */
6478 put_extern_sym(sym
, cur_text_section
, ind
, 0);
6479 funcname
= get_tok_str(sym
->v
, NULL
);
6481 /* Initialize VLA state */
6483 vla_sp_root_loc
= -1;
6484 /* put debug symbol */
6485 if (tcc_state
->do_debug
)
6486 put_func_debug(sym
);
6488 /* push a dummy symbol to enable local sym storage */
6489 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
6490 local_scope
= 1; /* for function parameters */
6491 gfunc_prolog(&sym
->type
);
6495 block(NULL
, NULL
, 0);
6498 cur_text_section
->data_offset
= ind
;
6499 label_pop(&global_label_stack
, NULL
);
6500 /* reset local stack */
6502 sym_pop(&local_stack
, NULL
);
6503 /* end of function */
6504 /* patch symbol size */
6505 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
6507 /* patch symbol weakness (this definition overrules any prototype) */
6508 if (sym
->type
.t
& VT_WEAK
)
6510 apply_visibility(sym
, &sym
->type
);
6511 if (tcc_state
->do_debug
) {
6512 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
6514 /* It's better to crash than to generate wrong code */
6515 cur_text_section
= NULL
;
6516 funcname
= ""; /* for safety */
6517 func_vt
.t
= VT_VOID
; /* for safety */
6518 func_var
= 0; /* for safety */
6519 ind
= 0; /* for safety */
6520 nocode_wanted
= saved_nocode_wanted
;
6524 static void gen_inline_functions(TCCState
*s
)
6527 int inline_generated
, i
, ln
;
6528 struct InlineFunc
*fn
;
6530 ln
= file
->line_num
;
6531 /* iterate while inline function are referenced */
6533 inline_generated
= 0;
6534 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6535 fn
= s
->inline_fns
[i
];
6537 if (sym
&& sym
->c
) {
6538 /* the function was used: generate its code and
6539 convert it to a normal function */
6542 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
6543 sym
->r
= VT_SYM
| VT_CONST
;
6544 sym
->type
.t
&= ~VT_INLINE
;
6546 begin_macro(fn
->func_str
, 1);
6548 cur_text_section
= text_section
;
6552 inline_generated
= 1;
6555 if (!inline_generated
)
6558 file
->line_num
= ln
;
6561 ST_FUNC
void free_inline_functions(TCCState
*s
)
6564 /* free tokens of unused inline functions */
6565 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6566 struct InlineFunc
*fn
= s
->inline_fns
[i
];
6568 tok_str_free(fn
->func_str
);
6570 dynarray_reset(&s
->inline_fns
, &s
->nb_inline_fns
);
6573 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
6574 static int decl0(int l
, int is_for_loop_init
)
6582 if (!parse_btype(&btype
, &ad
)) {
6583 if (is_for_loop_init
)
6585 /* skip redundant ';' */
6586 /* XXX: find more elegant solution */
6591 if (l
== VT_CONST
&&
6592 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6593 /* global asm block */
6597 /* special test for old K&R protos without explicit int
6598 type. Only accepted when defining global data */
6599 if (l
== VT_LOCAL
|| tok
< TOK_UIDENT
)
6603 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6604 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6606 if ((btype
.t
& VT_BTYPE
) == VT_STRUCT
) {
6607 int v
= btype
.ref
->v
;
6608 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) >= SYM_FIRST_ANOM
)
6609 tcc_warning("unnamed struct/union that defines no instances");
6614 while (1) { /* iterate thru each declaration */
6616 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6620 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
6621 printf("type = '%s'\n", buf
);
6624 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6625 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
6626 tcc_error("function without file scope cannot be static");
6628 /* if old style function prototype, we accept a
6631 if (sym
->c
== FUNC_OLD
)
6632 func_decl_list(sym
);
6635 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6636 ad
.asm_label
= asm_label_instr();
6637 /* parse one last attribute list, after asm label */
6638 parse_attribute(&ad
);
6645 #ifdef TCC_TARGET_PE
6646 if (ad
.a
.func_import
)
6647 type
.t
|= VT_IMPORT
;
6648 if (ad
.a
.func_export
)
6649 type
.t
|= VT_EXPORT
;
6651 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6655 tcc_error("cannot use local functions");
6656 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6657 expect("function definition");
6659 /* reject abstract declarators in function definition */
6661 while ((sym
= sym
->next
) != NULL
)
6662 if (!(sym
->v
& ~SYM_FIELD
))
6663 expect("identifier");
6665 /* XXX: cannot do better now: convert extern line to static inline */
6666 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6667 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6672 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6675 ref
= sym
->type
.ref
;
6676 if (0 == ref
->a
.func_proto
)
6677 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6679 /* use func_call from prototype if not defined */
6680 if (ref
->a
.func_call
!= FUNC_CDECL
6681 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6682 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6684 /* use export from prototype */
6685 if (ref
->a
.func_export
)
6686 type
.ref
->a
.func_export
= 1;
6688 /* use static from prototype */
6689 if (sym
->type
.t
& VT_STATIC
)
6690 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6692 /* If the definition has no visibility use the
6693 one from prototype. */
6694 if (! (type
.t
& VT_VIS_MASK
))
6695 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6697 if (!is_compatible_types(&sym
->type
, &type
)) {
6699 tcc_error("incompatible types for redefinition of '%s'",
6700 get_tok_str(v
, NULL
));
6702 type
.ref
->a
.func_proto
= 0;
6703 /* if symbol is already defined, then put complete type */
6706 /* put function symbol */
6707 sym
= global_identifier_push(v
, type
.t
, 0);
6708 sym
->type
.ref
= type
.ref
;
6711 /* static inline functions are just recorded as a kind
6712 of macro. Their code will be emitted at the end of
6713 the compilation unit only if they are used */
6714 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6715 (VT_INLINE
| VT_STATIC
)) {
6717 struct InlineFunc
*fn
;
6718 const char *filename
;
6720 filename
= file
? file
->filename
: "";
6721 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6722 strcpy(fn
->filename
, filename
);
6724 fn
->func_str
= tok_str_alloc();
6730 tcc_error("unexpected end of file");
6731 tok_str_add_tok(fn
->func_str
);
6736 } else if (t
== '}') {
6738 if (block_level
== 0)
6742 tok_str_add(fn
->func_str
, -1);
6743 tok_str_add(fn
->func_str
, 0);
6744 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6747 /* compute text section */
6748 cur_text_section
= ad
.section
;
6749 if (!cur_text_section
)
6750 cur_text_section
= text_section
;
6751 sym
->r
= VT_SYM
| VT_CONST
;
6756 if (btype
.t
& VT_TYPEDEF
) {
6757 /* save typedefed type */
6758 /* XXX: test storage specifiers ? */
6760 if (sym
&& sym
->scope
== local_scope
) {
6761 if (!is_compatible_types(&sym
->type
, &type
)
6762 || !(sym
->type
.t
& VT_TYPEDEF
))
6763 tcc_error("incompatible redefinition of '%s'",
6764 get_tok_str(v
, NULL
));
6767 sym
= sym_push(v
, &type
, 0, 0);
6770 sym
->type
.t
|= VT_TYPEDEF
;
6773 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6774 /* external function definition */
6775 /* specific case for func_call attribute */
6776 ad
.a
.func_proto
= 1;
6778 } else if (!(type
.t
& VT_ARRAY
)) {
6779 /* not lvalue if array */
6780 r
|= lvalue_type(type
.t
);
6782 has_init
= (tok
== '=');
6783 if (has_init
&& (type
.t
& VT_VLA
))
6784 tcc_error("Variable length array cannot be initialized");
6785 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6786 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6787 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6788 /* external variable or function */
6789 /* NOTE: as GCC, uninitialized global static
6790 arrays of null size are considered as
6792 sym
= external_sym(v
, &type
, r
);
6793 sym
->asm_label
= ad
.asm_label
;
6795 if (ad
.alias_target
) {
6800 alias_target
= sym_find(ad
.alias_target
);
6801 if (!alias_target
|| !alias_target
->c
)
6802 tcc_error("unsupported forward __alias__ attribute");
6803 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6804 tsec
.sh_num
= esym
->st_shndx
;
6805 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6808 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6809 if (type
.t
& VT_STATIC
)
6815 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, l
);
6819 if (is_for_loop_init
)
6832 ST_FUNC
void decl(int l
)
6837 /* ------------------------------------------------------------------------- */