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 static void parse_mult_str (CString
*astr
, const char *msg
)
2987 /* read the string */
2991 while (tok
== TOK_STR
) {
2992 /* XXX: add \0 handling too ? */
2993 cstr_cat(astr
, tokc
.str
.data
, -1);
2996 cstr_ccat(astr
, '\0');
2999 /* Parse GNUC __attribute__ extension. Currently, the following
3000 extensions are recognized:
3001 - aligned(n) : set data/function alignment.
3002 - packed : force data alignment to 1
3003 - section(x) : generate data/code in this section.
3004 - unused : currently ignored, but may be used someday.
3005 - regparm(n) : pass function parameters in registers (i386 only)
3007 static void parse_attribute(AttributeDef
*ad
)
3012 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
3016 while (tok
!= ')') {
3017 if (tok
< TOK_IDENT
)
3018 expect("attribute name");
3025 parse_mult_str(&astr
, "section name");
3026 ad
->section
= find_section(tcc_state
, (char *)astr
.data
);
3033 parse_mult_str(&astr
, "alias(\"target\")");
3034 ad
->alias_target
= /* save string as token, for later */
3035 tok_alloc((char*)astr
.data
, astr
.size
-1)->tok
;
3039 case TOK_VISIBILITY1
:
3040 case TOK_VISIBILITY2
:
3042 parse_mult_str(&astr
,
3043 "visibility(\"default|hidden|internal|protected\")");
3044 if (!strcmp (astr
.data
, "default"))
3045 ad
->a
.visibility
= STV_DEFAULT
;
3046 else if (!strcmp (astr
.data
, "hidden"))
3047 ad
->a
.visibility
= STV_HIDDEN
;
3048 else if (!strcmp (astr
.data
, "internal"))
3049 ad
->a
.visibility
= STV_INTERNAL
;
3050 else if (!strcmp (astr
.data
, "protected"))
3051 ad
->a
.visibility
= STV_PROTECTED
;
3053 expect("visibility(\"default|hidden|internal|protected\")");
3062 if (n
<= 0 || (n
& (n
- 1)) != 0)
3063 tcc_error("alignment must be a positive power of two");
3080 /* currently, no need to handle it because tcc does not
3081 track unused objects */
3085 /* currently, no need to handle it because tcc does not
3086 track unused objects */
3091 ad
->a
.func_call
= FUNC_CDECL
;
3096 ad
->a
.func_call
= FUNC_STDCALL
;
3098 #ifdef TCC_TARGET_I386
3108 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
3114 ad
->a
.func_call
= FUNC_FASTCALLW
;
3121 ad
->a
.mode
= VT_LLONG
+ 1;
3124 ad
->a
.mode
= VT_BYTE
+ 1;
3127 ad
->a
.mode
= VT_SHORT
+ 1;
3131 ad
->a
.mode
= VT_INT
+ 1;
3134 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
3141 ad
->a
.func_export
= 1;
3144 ad
->a
.func_import
= 1;
3147 if (tcc_state
->warn_unsupported
)
3148 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
3149 /* skip parameters */
3151 int parenthesis
= 0;
3155 else if (tok
== ')')
3158 } while (parenthesis
&& tok
!= -1);
3171 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
3172 static void struct_decl(CType
*type
, AttributeDef
*ad
, int u
)
3174 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
, extra_bytes
;
3175 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
3176 Sym
*s
, *ss
, *ass
, **ps
;
3180 a
= tok
; /* save decl type */
3182 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
3183 parse_attribute(ad
);
3189 /* struct already defined ? return it */
3191 expect("struct/union/enum name");
3193 if (s
&& (s
->scope
== local_scope
|| (tok
!= '{' && tok
!= ';'))) {
3195 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
3203 /* we put an undefined size for struct/union */
3204 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
3205 s
->r
= 0; /* default alignment is zero as gcc */
3206 /* put struct/union/enum name in type */
3214 tcc_error("struct/union/enum already defined");
3215 /* cannot be empty */
3217 /* non empty enums are not allowed */
3218 if (a
== TOK_ENUM
) {
3222 expect("identifier");
3224 if (ss
&& !local_stack
)
3225 tcc_error("redefinition of enumerator '%s'",
3226 get_tok_str(v
, NULL
));
3232 /* enum symbols have static storage */
3233 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
3234 ss
->type
.t
|= VT_STATIC
;
3239 /* NOTE: we accept a trailing comma */
3243 s
->c
= type_size(&int_type
, &align
);
3252 while (tok
!= '}') {
3253 if (!parse_btype(&btype
, &ad1
)) {
3260 tcc_error("flexible array member '%s' not at the end of struct",
3261 get_tok_str(v
, NULL
));
3266 type_decl(&type1
, &ad1
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3268 if ((type1
.t
& VT_BTYPE
) != VT_STRUCT
)
3269 expect("identifier");
3271 int v
= btype
.ref
->v
;
3272 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
3273 if (tcc_state
->ms_extensions
== 0)
3274 expect("identifier");
3278 if (type_size(&type1
, &align
) < 0) {
3279 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
3282 tcc_error("field '%s' has incomplete type",
3283 get_tok_str(v
, NULL
));
3285 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
3286 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
3287 tcc_error("invalid type for '%s'",
3288 get_tok_str(v
, NULL
));
3292 bit_size
= expr_const();
3293 /* XXX: handle v = 0 case for messages */
3295 tcc_error("negative width in bit-field '%s'",
3296 get_tok_str(v
, NULL
));
3297 if (v
&& bit_size
== 0)
3298 tcc_error("zero width for bit-field '%s'",
3299 get_tok_str(v
, NULL
));
3301 size
= type_size(&type1
, &align
);
3302 if (ad1
.a
.aligned
) {
3303 if (align
< ad1
.a
.aligned
)
3304 align
= ad1
.a
.aligned
;
3305 } else if (ad1
.a
.packed
) {
3307 } else if (*tcc_state
->pack_stack_ptr
) {
3308 if (align
> *tcc_state
->pack_stack_ptr
)
3309 align
= *tcc_state
->pack_stack_ptr
;
3312 if (bit_size
>= 0) {
3313 bt
= type1
.t
& VT_BTYPE
;
3320 tcc_error("bitfields must have scalar type");
3322 if (bit_size
> bsize
) {
3323 tcc_error("width of '%s' exceeds its type",
3324 get_tok_str(v
, NULL
));
3325 } else if (bit_size
== bsize
) {
3326 /* no need for bit fields */
3328 } else if (bit_size
== 0) {
3329 /* XXX: what to do if only padding in a
3331 /* zero size: means to pad */
3334 /* if type change, union, or will overrun
3335 * allignment slot, start at a newly
3337 if ((bit_pos
+ bit_size
) > bsize
||
3338 bt
!= prevbt
|| a
== TOK_UNION
)
3341 /* XXX: handle LSB first */
3342 type1
.t
|= VT_BITFIELD
|
3343 (bit_pos
<< VT_STRUCT_SHIFT
) |
3344 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
3345 bit_pos
+= bit_size
;
3346 /* without ms-bitfields, allocate the
3347 * minimum number of bytes necessary,
3348 * adding single bytes as needed */
3349 if (!tcc_state
->ms_bitfields
) {
3351 /* minimum bytes for new bitfield */
3352 size
= (bit_size
+ 7) / 8;
3354 /* enough spare bits already allocated? */
3355 bit_size
= (lbit_pos
- 1) % 8 + 1 + bit_size
;
3356 if (bit_size
> 8) /* doesn't fit */
3357 extra_bytes
= (bit_size
- 1) / 8;
3365 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3366 /* add new memory data only if starting bit
3367 field or adding bytes to existing bit field */
3368 if (extra_bytes
) c
+= extra_bytes
;
3369 else if (lbit_pos
== 0) {
3370 if (a
== TOK_STRUCT
) {
3371 c
= (c
+ align
- 1) & -align
;
3380 if (align
> maxalign
)
3384 printf("add field %s offset=%d",
3385 get_tok_str(v
, NULL
), offset
);
3386 if (type1
.t
& VT_BITFIELD
) {
3387 printf(" pos=%d size=%d",
3388 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3389 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3394 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3396 while ((ass
= ass
->next
) != NULL
) {
3397 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3402 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3406 if (tok
== ';' || tok
== TOK_EOF
)
3413 /* store size and alignment */
3414 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3420 /* return 1 if basic type is a type size (short, long, long long) */
3421 ST_FUNC
int is_btype_size(int bt
)
3423 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3426 /* Add type qualifiers to a type. If the type is an array then the qualifiers
3427 are added to the element type, copied because it could be a typedef. */
3428 static void parse_btype_qualify(CType
*type
, int qualifiers
)
3430 while (type
->t
& VT_ARRAY
) {
3431 type
->ref
= sym_push(SYM_FIELD
, &type
->ref
->type
, 0, type
->ref
->c
);
3432 type
= &type
->ref
->type
;
3434 type
->t
|= qualifiers
;
3437 /* return 0 if no type declaration. otherwise, return the basic type
3440 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3442 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3446 memset(ad
, 0, sizeof(AttributeDef
));
3454 /* currently, we really ignore extension */
3465 tcc_error("too many basic types");
3467 bt_size
= is_btype_size (u
& VT_BTYPE
);
3468 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3483 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3484 #ifndef TCC_TARGET_PE
3485 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3487 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3488 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3494 #ifdef TCC_TARGET_ARM64
3496 /* GCC's __uint128_t appears in some Linux header files. Make it a
3497 synonym for long double to get the size and alignment right. */
3509 if ((t
& VT_BTYPE
) == VT_LONG
) {
3510 #ifdef TCC_TARGET_PE
3511 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3513 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3521 struct_decl(&type1
, ad
, VT_ENUM
);
3524 type
->ref
= type1
.ref
;
3528 struct_decl(&type1
, ad
, VT_STRUCT
);
3531 /* type modifiers */
3536 parse_btype_qualify(type
, VT_CONSTANT
);
3544 parse_btype_qualify(type
, VT_VOLATILE
);
3551 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3552 tcc_error("signed and unsigned modifier");
3565 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3566 tcc_error("signed and unsigned modifier");
3567 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3592 /* GNUC attribute */
3593 case TOK_ATTRIBUTE1
:
3594 case TOK_ATTRIBUTE2
:
3595 parse_attribute(ad
);
3598 t
= (t
& ~VT_BTYPE
) | u
;
3606 parse_expr_type(&type1
);
3607 /* remove all storage modifiers except typedef */
3608 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3614 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3617 type
->t
= ((s
->type
.t
& ~VT_TYPEDEF
) |
3618 (t
& ~(VT_CONSTANT
| VT_VOLATILE
)));
3619 type
->ref
= s
->type
.ref
;
3620 if (t
& (VT_CONSTANT
| VT_VOLATILE
))
3621 parse_btype_qualify(type
, t
& (VT_CONSTANT
| VT_VOLATILE
));
3625 /* get attributes from typedef */
3626 if (0 == ad
->a
.aligned
)
3627 ad
->a
.aligned
= s
->a
.aligned
;
3628 if (0 == ad
->a
.func_call
)
3629 ad
->a
.func_call
= s
->a
.func_call
;
3630 ad
->a
.packed
|= s
->a
.packed
;
3639 if (tcc_state
->char_is_unsigned
) {
3640 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3644 /* long is never used as type */
3645 if ((t
& VT_BTYPE
) == VT_LONG
)
3646 #if (!defined TCC_TARGET_X86_64 && !defined TCC_TARGET_ARM64) || \
3647 defined TCC_TARGET_PE
3648 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3650 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3656 /* convert a function parameter type (array to pointer and function to
3657 function pointer) */
3658 static inline void convert_parameter_type(CType
*pt
)
3660 /* remove const and volatile qualifiers (XXX: const could be used
3661 to indicate a const function parameter */
3662 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3663 /* array must be transformed to pointer according to ANSI C */
3665 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3670 ST_FUNC
void parse_asm_str(CString
*astr
)
3673 parse_mult_str(astr
, "string constant");
3676 /* Parse an asm label and return the token */
3677 static int asm_label_instr(void)
3683 parse_asm_str(&astr
);
3686 printf("asm_alias: \"%s\"\n", (char *)astr
.data
);
3688 v
= tok_alloc(astr
.data
, astr
.size
- 1)->tok
;
3693 static void post_type(CType
*type
, AttributeDef
*ad
)
3695 int n
, l
, t1
, arg_size
, align
;
3696 Sym
**plast
, *s
, *first
;
3701 /* function declaration */
3709 /* read param name and compute offset */
3710 if (l
!= FUNC_OLD
) {
3711 if (!parse_btype(&pt
, &ad1
)) {
3713 tcc_error("invalid type");
3720 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3722 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3723 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3724 tcc_error("parameter declared as void");
3725 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3730 expect("identifier");
3734 convert_parameter_type(&pt
);
3735 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3741 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3748 /* if no parameters, then old type prototype */
3752 /* NOTE: const is ignored in returned type as it has a special
3753 meaning in gcc / C++ */
3754 type
->t
&= ~VT_CONSTANT
;
3755 /* some ancient pre-K&R C allows a function to return an array
3756 and the array brackets to be put after the arguments, such
3757 that "int c()[]" means something like "int[] c()" */
3760 skip(']'); /* only handle simple "[]" */
3763 /* we push a anonymous symbol which will contain the function prototype */
3764 ad
->a
.func_args
= arg_size
;
3765 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3770 } else if (tok
== '[') {
3771 /* array definition */
3773 if (tok
== TOK_RESTRICT1
)
3778 if (!local_stack
|| nocode_wanted
)
3779 vpushi(expr_const());
3781 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3784 tcc_error("invalid array size");
3786 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3787 tcc_error("size of variable length array should be an integer");
3792 /* parse next post type */
3793 post_type(type
, ad
);
3794 if (type
->t
== VT_FUNC
)
3795 tcc_error("declaration of an array of functions");
3796 t1
|= type
->t
& VT_VLA
;
3799 loc
-= type_size(&int_type
, &align
);
3803 vla_runtime_type_size(type
, &align
);
3805 vset(&int_type
, VT_LOCAL
|VT_LVAL
, n
);
3812 /* we push an anonymous symbol which will contain the array
3814 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3815 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3820 /* Parse a type declaration (except basic type), and return the type
3821 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3822 expected. 'type' should contain the basic type. 'ad' is the
3823 attribute definition of the basic type. It can be modified by
3826 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3829 CType type1
, *type2
;
3830 int qualifiers
, storage
;
3832 while (tok
== '*') {
3840 qualifiers
|= VT_CONSTANT
;
3845 qualifiers
|= VT_VOLATILE
;
3853 type
->t
|= qualifiers
;
3856 /* XXX: clarify attribute handling */
3857 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3858 parse_attribute(ad
);
3860 /* recursive type */
3861 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3862 type1
.t
= 0; /* XXX: same as int */
3865 /* XXX: this is not correct to modify 'ad' at this point, but
3866 the syntax is not clear */
3867 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3868 parse_attribute(ad
);
3869 type_decl(&type1
, ad
, v
, td
);
3872 /* type identifier */
3873 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3877 if (!(td
& TYPE_ABSTRACT
))
3878 expect("identifier");
3882 storage
= type
->t
& VT_STORAGE
;
3883 type
->t
&= ~VT_STORAGE
;
3884 if (storage
& VT_STATIC
) {
3885 int saved_nocode_wanted
= nocode_wanted
;
3887 post_type(type
, ad
);
3888 nocode_wanted
= saved_nocode_wanted
;
3890 post_type(type
, ad
);
3892 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3893 parse_attribute(ad
);
3897 /* append type at the end of type1 */
3910 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3911 ST_FUNC
int lvalue_type(int t
)
3916 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3918 else if (bt
== VT_SHORT
)
3922 if (t
& VT_UNSIGNED
)
3923 r
|= VT_LVAL_UNSIGNED
;
3927 /* indirection with full error checking and bound check */
3928 ST_FUNC
void indir(void)
3930 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3931 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3935 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3937 vtop
->type
= *pointed_type(&vtop
->type
);
3938 /* Arrays and functions are never lvalues */
3939 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3940 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3941 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3942 /* if bound checking, the referenced pointer must be checked */
3943 #ifdef CONFIG_TCC_BCHECK
3944 if (tcc_state
->do_bounds_check
)
3945 vtop
->r
|= VT_MUSTBOUND
;
3950 /* pass a parameter to a function and do type checking and casting */
3951 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3956 func_type
= func
->c
;
3957 if (func_type
== FUNC_OLD
||
3958 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3959 /* default casting : only need to convert float to double */
3960 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3963 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3964 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3967 } else if (arg
== NULL
) {
3968 tcc_error("too many arguments to function");
3971 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3972 gen_assign_cast(&type
);
3976 /* parse an expression of the form '(type)' or '(expr)' and return its
3978 static void parse_expr_type(CType
*type
)
3984 if (parse_btype(type
, &ad
)) {
3985 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3992 static void parse_type(CType
*type
)
3997 if (!parse_btype(type
, &ad
)) {
4000 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
4003 static void vpush_tokc(int t
)
4008 vsetc(&type
, VT_CONST
, &tokc
);
4011 ST_FUNC
void unary(void)
4013 int n
, t
, align
, size
, r
, sizeof_caller
;
4018 sizeof_caller
= in_sizeof
;
4020 /* XXX: GCC 2.95.3 does not generate a table although it should be
4034 vpush_tokc(VT_INT
| VT_UNSIGNED
);
4038 vpush_tokc(VT_LLONG
);
4042 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
4046 vpush_tokc(VT_FLOAT
);
4050 vpush_tokc(VT_DOUBLE
);
4054 vpush_tokc(VT_LDOUBLE
);
4057 case TOK___FUNCTION__
:
4059 goto tok_identifier
;
4065 /* special function name identifier */
4066 len
= strlen(funcname
) + 1;
4067 /* generate char[len] type */
4072 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
4073 ptr
= section_ptr_add(data_section
, len
);
4074 memcpy(ptr
, funcname
, len
);
4079 #ifdef TCC_TARGET_PE
4080 t
= VT_SHORT
| VT_UNSIGNED
;
4086 /* string parsing */
4089 if (tcc_state
->warn_write_strings
)
4094 memset(&ad
, 0, sizeof(AttributeDef
));
4095 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
4100 if (parse_btype(&type
, &ad
)) {
4101 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
4103 /* check ISOC99 compound literal */
4105 /* data is allocated locally by default */
4110 /* all except arrays are lvalues */
4111 if (!(type
.t
& VT_ARRAY
))
4112 r
|= lvalue_type(type
.t
);
4113 memset(&ad
, 0, sizeof(AttributeDef
));
4114 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
4116 if (sizeof_caller
) {
4123 } else if (tok
== '{') {
4125 tcc_error("expected constant");
4126 /* save all registers */
4129 /* statement expression : we do not accept break/continue
4130 inside as GCC does */
4131 block(NULL
, NULL
, 1);
4146 /* functions names must be treated as function pointers,
4147 except for unary '&' and sizeof. Since we consider that
4148 functions are not lvalues, we only have to handle it
4149 there and in function calls. */
4150 /* arrays can also be used although they are not lvalues */
4151 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
4152 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
4154 mk_pointer(&vtop
->type
);
4160 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4162 boolean
.t
= VT_BOOL
;
4164 vtop
->c
.i
= !vtop
->c
.i
;
4165 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
4169 vseti(VT_JMP
, gvtst(1, 0));
4181 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
4182 tcc_error("pointer not accepted for unary plus");
4183 /* In order to force cast, we add zero, except for floating point
4184 where we really need an noop (otherwise -0.0 will be transformed
4186 if (!is_float(vtop
->type
.t
)) {
4197 unary_type(&type
); // Perform a in_sizeof = 0;
4198 size
= type_size(&type
, &align
);
4199 if (t
== TOK_SIZEOF
) {
4200 if (!(type
.t
& VT_VLA
)) {
4202 tcc_error("sizeof applied to an incomplete type");
4205 vla_runtime_type_size(&type
, &align
);
4210 vtop
->type
.t
|= VT_UNSIGNED
;
4213 case TOK_builtin_expect
:
4215 /* __builtin_expect is a no-op for now */
4216 int saved_nocode_wanted
;
4221 saved_nocode_wanted
= nocode_wanted
;
4225 nocode_wanted
= saved_nocode_wanted
;
4229 case TOK_builtin_types_compatible_p
:
4238 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4239 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4240 vpushi(is_compatible_types(&type1
, &type2
));
4243 case TOK_builtin_constant_p
:
4245 int saved_nocode_wanted
, res
;
4248 saved_nocode_wanted
= nocode_wanted
;
4251 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
4253 nocode_wanted
= saved_nocode_wanted
;
4258 case TOK_builtin_frame_address
:
4259 case TOK_builtin_return_address
:
4266 if (tok
!= TOK_CINT
) {
4267 tcc_error("%s only takes positive integers",
4268 tok1
== TOK_builtin_return_address
?
4269 "__builtin_return_address" :
4270 "__builtin_frame_address");
4272 level
= (uint32_t)tokc
.i
;
4277 vset(&type
, VT_LOCAL
, 0); /* local frame */
4279 mk_pointer(&vtop
->type
);
4280 indir(); /* -> parent frame */
4282 if (tok1
== TOK_builtin_return_address
) {
4283 // assume return address is just above frame pointer on stack
4286 mk_pointer(&vtop
->type
);
4291 #ifdef TCC_TARGET_X86_64
4292 #ifdef TCC_TARGET_PE
4293 case TOK_builtin_va_start
:
4301 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4302 tcc_error("__builtin_va_start expects a local variable");
4303 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
4304 vtop
->type
= char_pointer_type
;
4310 case TOK_builtin_va_arg_types
:
4317 vpushi(classify_x86_64_va_arg(&type
));
4323 #ifdef TCC_TARGET_ARM64
4324 case TOK___va_start
: {
4326 tcc_error("statement in global scope");
4336 vtop
->type
.t
= VT_VOID
;
4339 case TOK___va_arg
: {
4342 tcc_error("statement in global scope");
4354 case TOK___arm64_clear_cache
: {
4363 vtop
->type
.t
= VT_VOID
;
4367 /* pre operations */
4378 t
= vtop
->type
.t
& VT_BTYPE
;
4380 /* In IEEE negate(x) isn't subtract(0,x), but rather
4385 else if (t
== VT_DOUBLE
)
4396 goto tok_identifier
;
4398 /* allow to take the address of a label */
4399 if (tok
< TOK_UIDENT
)
4400 expect("label identifier");
4401 s
= label_find(tok
);
4403 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4405 if (s
->r
== LABEL_DECLARED
)
4406 s
->r
= LABEL_FORWARD
;
4409 s
->type
.t
= VT_VOID
;
4410 mk_pointer(&s
->type
);
4411 s
->type
.t
|= VT_STATIC
;
4413 vpushsym(&s
->type
, s
);
4417 // special qnan , snan and infinity values
4419 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
4423 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
4427 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
4436 expect("identifier");
4439 const char *name
= get_tok_str(t
, NULL
);
4441 tcc_error("'%s' undeclared", name
);
4442 /* for simple function calls, we tolerate undeclared
4443 external reference to int() function */
4444 if (tcc_state
->warn_implicit_function_declaration
4445 #ifdef TCC_TARGET_PE
4446 /* people must be warned about using undeclared WINAPI functions
4447 (which usually start with uppercase letter) */
4448 || (name
[0] >= 'A' && name
[0] <= 'Z')
4451 tcc_warning("implicit declaration of function '%s'", name
);
4452 s
= external_global_sym(t
, &func_old_type
, 0);
4454 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
4455 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
4456 /* if referencing an inline function, then we generate a
4457 symbol to it if not already done. It will have the
4458 effect to generate code for it at the end of the
4459 compilation unit. Inline function as always
4460 generated in the text section. */
4462 put_extern_sym(s
, text_section
, 0, 0);
4463 r
= VT_SYM
| VT_CONST
;
4467 vset(&s
->type
, r
, s
->c
);
4468 /* if forward reference, we must point to s */
4469 if (vtop
->r
& VT_SYM
) {
4476 /* post operations */
4478 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4481 } else if (tok
== '.' || tok
== TOK_ARROW
|| tok
== TOK_CDOUBLE
) {
4484 if (tok
== TOK_ARROW
)
4486 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4489 /* expect pointer on structure */
4490 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4491 expect("struct or union");
4492 if (tok
== TOK_CDOUBLE
)
4493 expect("field name");
4495 if (tok
== TOK_CINT
|| tok
== TOK_CUINT
)
4496 expect("field name");
4500 while ((s
= s
->next
) != NULL
) {
4505 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, &tokc
));
4506 /* add field offset to pointer */
4507 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4510 /* change type to field type, and set to lvalue */
4511 vtop
->type
= s
->type
;
4512 vtop
->type
.t
|= qualifiers
;
4513 /* an array is never an lvalue */
4514 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4515 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4516 #ifdef CONFIG_TCC_BCHECK
4517 /* if bound checking, the referenced pointer must be checked */
4518 if (tcc_state
->do_bounds_check
&& (vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4519 vtop
->r
|= VT_MUSTBOUND
;
4523 } else if (tok
== '[') {
4529 } else if (tok
== '(') {
4532 int nb_args
, ret_nregs
, ret_align
, regsize
, variadic
;
4535 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4536 /* pointer test (no array accepted) */
4537 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4538 vtop
->type
= *pointed_type(&vtop
->type
);
4539 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4543 expect("function pointer");
4546 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4548 /* get return type */
4551 sa
= s
->next
; /* first parameter */
4554 /* compute first implicit argument if a structure is returned */
4555 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4556 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4557 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4558 &ret_align
, ®size
);
4560 /* get some space for the returned structure */
4561 size
= type_size(&s
->type
, &align
);
4562 #ifdef TCC_TARGET_ARM64
4563 /* On arm64, a small struct is return in registers.
4564 It is much easier to write it to memory if we know
4565 that we are allowed to write some extra bytes, so
4566 round the allocated space up to a power of 2: */
4568 while (size
& (size
- 1))
4569 size
= (size
| (size
- 1)) + 1;
4571 loc
= (loc
- size
) & -align
;
4573 ret
.r
= VT_LOCAL
| VT_LVAL
;
4574 /* pass it as 'int' to avoid structure arg passing
4576 vseti(VT_LOCAL
, loc
);
4586 /* return in register */
4587 if (is_float(ret
.type
.t
)) {
4588 ret
.r
= reg_fret(ret
.type
.t
);
4589 #ifdef TCC_TARGET_X86_64
4590 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4594 #ifndef TCC_TARGET_ARM64
4595 #ifdef TCC_TARGET_X86_64
4596 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4598 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4609 gfunc_param_typed(s
, sa
);
4619 tcc_error("too few arguments to function");
4621 if (!nocode_wanted
) {
4622 gfunc_call(nb_args
);
4624 vtop
-= (nb_args
+ 1);
4628 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4629 vsetc(&ret
.type
, r
, &ret
.c
);
4630 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4633 /* handle packed struct return */
4634 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4637 size
= type_size(&s
->type
, &align
);
4638 /* We're writing whole regs often, make sure there's enough
4639 space. Assume register size is power of 2. */
4640 if (regsize
> align
)
4642 loc
= (loc
- size
) & -align
;
4646 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4650 if (--ret_nregs
== 0)
4654 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4662 ST_FUNC
void expr_prod(void)
4667 while (tok
== '*' || tok
== '/' || tok
== '%') {
4675 ST_FUNC
void expr_sum(void)
4680 while (tok
== '+' || tok
== '-') {
4688 static void expr_shift(void)
4693 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4701 static void expr_cmp(void)
4706 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4707 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4715 static void expr_cmpeq(void)
4720 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4728 static void expr_and(void)
4731 while (tok
== '&') {
4738 static void expr_xor(void)
4741 while (tok
== '^') {
4748 static void expr_or(void)
4751 while (tok
== '|') {
4758 /* XXX: fix this mess */
4759 static void expr_land_const(void)
4762 while (tok
== TOK_LAND
) {
4768 static void expr_lor_const(void)
4771 while (tok
== TOK_LOR
) {
4778 static void expr_land(void)
4781 if (tok
== TOK_LAND
) {
4782 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4793 int saved_nocode_wanted
= nocode_wanted
;
4797 nocode_wanted
= saved_nocode_wanted
;
4805 if (tok
!= TOK_LAND
) {
4816 static void expr_lor(void)
4819 if (tok
== TOK_LOR
) {
4820 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4827 int saved_nocode_wanted
= nocode_wanted
;
4831 nocode_wanted
= saved_nocode_wanted
;
4843 if (tok
!= TOK_LOR
) {
4854 static void expr_cond(void)
4856 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
, islv
;
4858 CType type
, type1
, type2
;
4863 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4864 int saved_nocode_wanted
= nocode_wanted
;
4867 boolean
.t
= VT_BOOL
;
4873 if (tok
!= ':' || !gnu_ext
) {
4881 nocode_wanted
= saved_nocode_wanted
;
4884 if (tok
!= ':' || !gnu_ext
) {
4888 nocode_wanted
= saved_nocode_wanted
;
4895 if (vtop
!= vstack
) {
4896 /* needed to avoid having different registers saved in
4898 if (is_float(vtop
->type
.t
)) {
4900 #ifdef TCC_TARGET_X86_64
4901 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4911 if (tok
== ':' && gnu_ext
) {
4919 sv
= *vtop
; /* save value to handle it later */
4920 vtop
--; /* no vpop so that FP stack is not flushed */
4928 bt1
= t1
& VT_BTYPE
;
4930 bt2
= t2
& VT_BTYPE
;
4931 /* cast operands to correct type according to ISOC rules */
4932 if (is_float(bt1
) || is_float(bt2
)) {
4933 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4934 type
.t
= VT_LDOUBLE
;
4935 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4940 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4941 /* cast to biggest op */
4943 /* convert to unsigned if it does not fit in a long long */
4944 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4945 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4946 type
.t
|= VT_UNSIGNED
;
4947 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4948 /* If one is a null ptr constant the result type
4950 if (is_null_pointer (vtop
))
4952 else if (is_null_pointer (&sv
))
4954 /* XXX: test pointer compatibility, C99 has more elaborate
4958 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4959 /* XXX: test function pointer compatibility */
4960 type
= bt1
== VT_FUNC
? type1
: type2
;
4961 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4962 /* XXX: test structure compatibility */
4963 type
= bt1
== VT_STRUCT
? type1
: type2
;
4964 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4965 /* NOTE: as an extension, we accept void on only one side */
4968 /* integer operations */
4970 /* convert to unsigned if it does not fit in an integer */
4971 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4972 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4973 type
.t
|= VT_UNSIGNED
;
4975 /* keep structs lvalue by transforming `(expr ? a : b)` to `*(expr ? &a : &b)` so
4976 that `(expr ? a : b).mem` does not error with "lvalue expected" */
4977 islv
= (vtop
->r
& VT_LVAL
) && (sv
.r
& VT_LVAL
) && VT_STRUCT
== (type
.t
& VT_BTYPE
);
4979 /* now we convert second operand */
4982 mk_pointer(&vtop
->type
);
4985 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4988 if (is_float(type
.t
)) {
4990 #ifdef TCC_TARGET_X86_64
4991 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4995 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4996 /* for long longs, we use fixed registers to avoid having
4997 to handle a complicated move */
5002 /* this is horrible, but we must also convert first
5006 /* put again first value and cast it */
5010 mk_pointer(&vtop
->type
);
5013 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
5016 move_reg(r2
, r1
, type
.t
);
5025 static void expr_eq(void)
5031 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
5032 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
5033 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
5048 ST_FUNC
void gexpr(void)
5059 /* parse an expression and return its type without any side effect. */
5060 static void expr_type(CType
*type
)
5062 int saved_nocode_wanted
;
5064 saved_nocode_wanted
= nocode_wanted
;
5069 nocode_wanted
= saved_nocode_wanted
;
5072 /* parse a unary expression and return its type without any side
5074 static void unary_type(CType
*type
)
5086 /* parse a constant expression and return value in vtop. */
5087 static void expr_const1(void)
5096 /* parse an integer constant and return its value. */
5097 ST_FUNC
int expr_const(void)
5101 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
5102 expect("constant expression");
5108 /* return the label token if current token is a label, otherwise
5110 static int is_label(void)
5114 /* fast test first */
5115 if (tok
< TOK_UIDENT
)
5117 /* no need to save tokc because tok is an identifier */
5124 unget_tok(last_tok
);
5129 static void label_or_decl(int l
)
5133 /* fast test first */
5134 if (tok
>= TOK_UIDENT
)
5136 /* no need to save tokc because tok is an identifier */
5140 unget_tok(last_tok
);
5143 unget_tok(last_tok
);
5148 static int case_cmp(const void *pa
, const void *pb
)
5150 int a
= (*(struct case_t
**) pa
)->v1
;
5151 int b
= (*(struct case_t
**) pb
)->v1
;
5152 return a
< b
? -1 : a
> b
;
5155 static int gcase(struct case_t
**base
, int len
, int case_reg
, int *bsym
)
5167 case_reg
= gv(RC_INT
);
5173 gtst_addr(0, p
->sym
); /* v1 <= x <= v2 */
5174 case_reg
= gv(RC_INT
);
5177 case_reg
= gcase(base
, len
/2, case_reg
, bsym
);
5178 if (cur_switch
->def_sym
)
5179 gjmp_addr(cur_switch
->def_sym
);
5181 *bsym
= gjmp(*bsym
);
5185 base
+= e
; len
-= e
;
5193 if (p
->v1
== p
->v2
) {
5195 gtst_addr(0, p
->sym
);
5199 case_reg
= gv(RC_INT
);
5205 gtst_addr(0, p
->sym
);
5208 case_reg
= gv(RC_INT
);
5214 static void block(int *bsym
, int *csym
, int is_expr
)
5219 /* generate line number info */
5220 if (tcc_state
->do_debug
&&
5221 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
5222 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
5224 last_line_num
= file
->line_num
;
5228 /* default return value is (void) */
5230 vtop
->type
.t
= VT_VOID
;
5233 if (tok
== TOK_IF
) {
5240 block(bsym
, csym
, 0);
5242 if (c
== TOK_ELSE
) {
5246 block(bsym
, csym
, 0);
5247 gsym(d
); /* patch else jmp */
5250 } else if (tok
== TOK_WHILE
) {
5266 } else if (tok
== '{') {
5268 int block_vla_sp_loc
= vla_sp_loc
, saved_vlas_in_scope
= vlas_in_scope
;
5271 /* record local declaration stack position */
5273 llabel
= local_label_stack
;
5276 /* handle local labels declarations */
5277 if (tok
== TOK_LABEL
) {
5280 if (tok
< TOK_UIDENT
)
5281 expect("label identifier");
5282 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
5292 while (tok
!= '}') {
5293 label_or_decl(VT_LOCAL
);
5297 block(bsym
, csym
, is_expr
);
5300 /* pop locally defined labels */
5301 label_pop(&local_label_stack
, llabel
);
5303 /* XXX: this solution makes only valgrind happy...
5304 triggered by gcc.c-torture/execute/20000917-1.c */
5306 switch(vtop
->type
.t
& VT_BTYPE
) {
5308 /* this breaks a compilation of the linux kernel v2.4.26 */
5309 /* pmd_t *new = ({ __asm__ __volatile__("ud2\n") ; ((pmd_t *)1); }); */
5310 /* Look a commit a80acab: Display error on statement expressions with complex return type */
5311 /* A pointer is not a complex return type */
5315 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
5317 tcc_error("unsupported expression type");
5320 /* pop locally defined symbols */
5322 sym_pop(&local_stack
, s
);
5324 /* Pop VLA frames and restore stack pointer if required */
5325 if (vlas_in_scope
> saved_vlas_in_scope
) {
5326 vla_sp_loc
= saved_vlas_in_scope
? block_vla_sp_loc
: vla_sp_root_loc
;
5329 vlas_in_scope
= saved_vlas_in_scope
;
5332 } else if (tok
== TOK_RETURN
) {
5336 gen_assign_cast(&func_vt
);
5337 #ifdef TCC_TARGET_ARM64
5338 // Perhaps it would be better to use this for all backends:
5341 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
5342 CType type
, ret_type
;
5343 int ret_align
, ret_nregs
, regsize
;
5344 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
5345 &ret_align
, ®size
);
5346 if (0 == ret_nregs
) {
5347 /* if returning structure, must copy it to implicit
5348 first pointer arg location */
5351 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
5354 /* copy structure value to pointer */
5357 /* returning structure packed into registers */
5358 int r
, size
, addr
, align
;
5359 size
= type_size(&func_vt
,&align
);
5360 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) ||
5361 (vtop
->c
.i
& (ret_align
-1)))
5362 && (align
& (ret_align
-1))) {
5363 loc
= (loc
- size
) & -ret_align
;
5366 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
5370 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
5372 vtop
->type
= ret_type
;
5373 if (is_float(ret_type
.t
))
5374 r
= rc_fret(ret_type
.t
);
5385 if (--ret_nregs
== 0)
5387 /* We assume that when a structure is returned in multiple
5388 registers, their classes are consecutive values of the
5391 vtop
->c
.i
+= regsize
;
5395 } else if (is_float(func_vt
.t
)) {
5396 gv(rc_fret(func_vt
.t
));
5401 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
5404 /* jump unless last stmt in top-level block */
5405 if (tok
!= '}' || local_scope
!= 1)
5407 } else if (tok
== TOK_BREAK
) {
5410 tcc_error("cannot break");
5411 *bsym
= gjmp(*bsym
);
5414 } else if (tok
== TOK_CONTINUE
) {
5417 tcc_error("cannot continue");
5418 vla_sp_restore_root();
5419 *csym
= gjmp(*csym
);
5422 } else if (tok
== TOK_FOR
) {
5429 /* c99 for-loop init decl? */
5430 if (!decl0(VT_LOCAL
, 1)) {
5431 /* no, regular for-loop init expr */
5463 sym_pop(&local_stack
, s
);
5466 if (tok
== TOK_DO
) {
5483 if (tok
== TOK_SWITCH
) {
5484 struct switch_t
*saved
, sw
;
5488 /* XXX: other types than integer */
5493 b
= gjmp(0); /* jump to first case */
5494 sw
.p
= NULL
; sw
.n
= 0; sw
.def_sym
= 0;
5498 a
= gjmp(a
); /* add implicit break */
5501 qsort(sw
.p
, sw
.n
, sizeof(void*), case_cmp
);
5502 for (b
= 1; b
< sw
.n
; b
++)
5503 if (sw
.p
[b
- 1]->v2
>= sw
.p
[b
]->v1
)
5504 tcc_error("duplicate case value");
5505 gcase(sw
.p
, sw
.n
, c
, &a
);
5507 gjmp_addr(sw
.def_sym
);
5508 dynarray_reset(&sw
.p
, &sw
.n
);
5513 if (tok
== TOK_CASE
) {
5514 struct case_t
*cr
= tcc_malloc(sizeof(struct case_t
));
5518 cr
->v1
= cr
->v2
= expr_const();
5519 if (gnu_ext
&& tok
== TOK_DOTS
) {
5521 cr
->v2
= expr_const();
5522 if (cr
->v2
< cr
->v1
)
5523 tcc_warning("empty case range");
5526 dynarray_add((void***) &cur_switch
->p
, &cur_switch
->n
, cr
);
5529 goto block_after_label
;
5531 if (tok
== TOK_DEFAULT
) {
5536 if (cur_switch
->def_sym
)
5537 tcc_error("too many 'default'");
5538 cur_switch
->def_sym
= ind
;
5540 goto block_after_label
;
5542 if (tok
== TOK_GOTO
) {
5544 if (tok
== '*' && gnu_ext
) {
5548 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
5551 } else if (tok
>= TOK_UIDENT
) {
5552 s
= label_find(tok
);
5553 /* put forward definition if needed */
5555 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
5557 if (s
->r
== LABEL_DECLARED
)
5558 s
->r
= LABEL_FORWARD
;
5560 vla_sp_restore_root();
5561 if (s
->r
& LABEL_FORWARD
)
5562 s
->jnext
= gjmp(s
->jnext
);
5564 gjmp_addr(s
->jnext
);
5567 expect("label identifier");
5570 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
5578 if (s
->r
== LABEL_DEFINED
)
5579 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
5581 s
->r
= LABEL_DEFINED
;
5583 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
5587 /* we accept this, but it is a mistake */
5590 tcc_warning("deprecated use of label at end of compound statement");
5594 block(bsym
, csym
, is_expr
);
5597 /* expression case */
5612 /* t is the array or struct type. c is the array or struct
5613 address. cur_index/cur_field is the pointer to the current
5614 value. 'size_only' is true if only size info is needed (only used
5616 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5617 int *cur_index
, Sym
**cur_field
,
5621 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5627 if (gnu_ext
&& (l
= is_label()) != 0)
5629 while (tok
== '[' || tok
== '.') {
5631 if (!(type
->t
& VT_ARRAY
))
5632 expect("array type");
5635 index
= expr_const();
5636 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5637 expect("invalid index");
5638 if (tok
== TOK_DOTS
&& gnu_ext
) {
5640 index_last
= expr_const();
5641 if (index_last
< 0 ||
5642 (s
->c
>= 0 && index_last
>= s
->c
) ||
5644 expect("invalid index");
5650 *cur_index
= index_last
;
5651 type
= pointed_type(type
);
5652 elem_size
= type_size(type
, &align
);
5653 c
+= index
* elem_size
;
5654 /* NOTE: we only support ranges for last designator */
5655 nb_elems
= index_last
- index
+ 1;
5656 if (nb_elems
!= 1) {
5665 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5666 expect("struct/union type");
5679 /* XXX: fix this mess by using explicit storage field */
5681 type1
.t
|= (type
->t
& ~VT_TYPE
);
5695 if (type
->t
& VT_ARRAY
) {
5697 type
= pointed_type(type
);
5698 c
+= index
* type_size(type
, &align
);
5702 tcc_error("too many field init");
5703 /* XXX: fix this mess by using explicit storage field */
5705 type1
.t
|= (type
->t
& ~VT_TYPE
);
5710 decl_initializer(type
, sec
, c
, 0, size_only
);
5712 /* XXX: make it more general */
5713 if (!size_only
&& nb_elems
> 1) {
5714 unsigned long c_end
;
5719 tcc_error("range init not supported yet for dynamic storage");
5720 c_end
= c
+ nb_elems
* elem_size
;
5721 if (c_end
> sec
->data_allocated
)
5722 section_realloc(sec
, c_end
);
5723 src
= sec
->data
+ c
;
5725 for(i
= 1; i
< nb_elems
; i
++) {
5727 memcpy(dst
, src
, elem_size
);
5733 #define EXPR_CONST 1
5736 /* store a value or an expression directly in global data or in local array */
5737 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5738 int v
, int expr_type
)
5740 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5742 unsigned long long bit_mask
;
5750 /* compound literals must be allocated globally in this case */
5751 saved_global_expr
= global_expr
;
5754 global_expr
= saved_global_expr
;
5755 /* NOTE: symbols are accepted */
5756 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5757 tcc_error("initializer element is not constant");
5765 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5768 /* XXX: not portable */
5769 /* XXX: generate error if incorrect relocation */
5770 gen_assign_cast(&dtype
);
5771 bt
= type
->t
& VT_BTYPE
;
5772 /* we'll write at most 16 bytes */
5773 if (c
+ 16 > sec
->data_allocated
) {
5774 section_realloc(sec
, c
+ 16);
5776 ptr
= sec
->data
+ c
;
5777 /* XXX: make code faster ? */
5778 if (!(type
->t
& VT_BITFIELD
)) {
5780 bit_size
= PTR_SIZE
* 8;
5783 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5784 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5785 bit_mask
= (1LL << bit_size
) - 1;
5787 if ((vtop
->r
& VT_SYM
) &&
5793 (bt
== VT_LLONG
&& bit_size
!= 64) ||
5797 (bt
== VT_INT
&& bit_size
!= 32)
5800 tcc_error("initializer element is not computable at load time");
5802 /* XXX: when cross-compiling we assume that each type has the
5803 same representation on host and target, which is likely to
5804 be wrong in the case of long double */
5806 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5808 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5811 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5814 *(double *)ptr
= vtop
->c
.d
;
5817 if (sizeof(long double) == LDOUBLE_SIZE
)
5818 *(long double *)ptr
= vtop
->c
.ld
;
5819 else if (sizeof(double) == LDOUBLE_SIZE
)
5820 *(double *)ptr
= vtop
->c
.ld
;
5822 tcc_error("can't cross compile long double constants");
5826 *(long long *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5832 addr_t val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5833 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5834 if (vtop
->r
& VT_SYM
)
5835 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5837 *(addr_t
*)ptr
|= val
;
5839 if (vtop
->r
& VT_SYM
)
5840 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5841 *(addr_t
*)ptr
|= val
;
5846 int val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5847 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5848 if (vtop
->r
& VT_SYM
)
5849 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5853 if (vtop
->r
& VT_SYM
)
5854 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5862 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5869 /* put zeros for variable based init */
5870 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5873 /* nothing to do because globals are already set to zero */
5875 vpush_global_sym(&func_old_type
, TOK_memset
);
5877 #ifdef TCC_TARGET_ARM
5888 /* 't' contains the type and storage info. 'c' is the offset of the
5889 object in section 'sec'. If 'sec' is NULL, it means stack based
5890 allocation. 'first' is true if array '{' must be read (multi
5891 dimension implicit array init handling). 'size_only' is true if
5892 size only evaluation is wanted (only for arrays). */
5893 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5894 int first
, int size_only
)
5896 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5897 int size1
, align1
, expr_type
;
5901 if (type
->t
& VT_VLA
) {
5904 /* save current stack pointer */
5905 if (vlas_in_scope
== 0) {
5906 if (vla_sp_root_loc
== -1)
5907 vla_sp_root_loc
= (loc
-= PTR_SIZE
);
5908 gen_vla_sp_save(vla_sp_root_loc
);
5911 vla_runtime_type_size(type
, &a
);
5912 gen_vla_alloc(type
, a
);
5916 } else if (type
->t
& VT_ARRAY
) {
5920 t1
= pointed_type(type
);
5921 size1
= type_size(t1
, &align1
);
5924 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5927 tcc_error("character array initializer must be a literal,"
5928 " optionally enclosed in braces");
5933 /* only parse strings here if correct type (otherwise: handle
5934 them as ((w)char *) expressions */
5935 if ((tok
== TOK_LSTR
&&
5936 #ifdef TCC_TARGET_PE
5937 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5939 (t1
->t
& VT_BTYPE
) == VT_INT
5941 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5942 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5945 /* compute maximum number of chars wanted */
5947 cstr_len
= tokc
.str
.size
;
5949 cstr_len
= tokc
.str
.size
/ sizeof(nwchar_t
);
5952 if (n
>= 0 && nb
> (n
- array_length
))
5953 nb
= n
- array_length
;
5956 tcc_warning("initializer-string for array is too long");
5957 /* in order to go faster for common case (char
5958 string in global variable, we handle it
5960 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5961 memcpy(sec
->data
+ c
+ array_length
, tokc
.str
.data
, nb
);
5965 ch
= ((unsigned char *)tokc
.str
.data
)[i
];
5967 ch
= ((nwchar_t
*)tokc
.str
.data
)[i
];
5968 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5976 /* only add trailing zero if enough storage (no
5977 warning in this case since it is standard) */
5978 if (n
< 0 || array_length
< n
) {
5980 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5986 while (tok
!= '}') {
5987 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5988 if (n
>= 0 && index
>= n
)
5989 tcc_error("index too large");
5990 /* must put zero in holes (note that doing it that way
5991 ensures that it even works with designators) */
5992 if (!size_only
&& array_length
< index
) {
5993 init_putz(t1
, sec
, c
+ array_length
* size1
,
5994 (index
- array_length
) * size1
);
5997 if (index
> array_length
)
5998 array_length
= index
;
5999 /* special test for multi dimensional arrays (may not
6000 be strictly correct if designators are used at the
6002 if (index
>= n
&& no_oblock
)
6011 /* put zeros at the end */
6012 if (!size_only
&& n
>= 0 && array_length
< n
) {
6013 init_putz(t1
, sec
, c
+ array_length
* size1
,
6014 (n
- array_length
) * size1
);
6016 /* patch type size if needed */
6018 s
->c
= array_length
;
6019 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
6020 (sec
|| !first
|| tok
== '{')) {
6022 /* NOTE: the previous test is a specific case for automatic
6023 struct/union init */
6024 /* XXX: union needs only one init */
6031 if (tcc_state
->old_struct_init_code
) {
6032 /* an old version of struct initialization.
6033 It have a problems. But with a new version
6034 linux 2.4.26 can't load ramdisk.
6036 while (tok
== '(') {
6040 if (!parse_btype(&type1
, &ad1
))
6042 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6044 if (!is_assignable_types(type
, &type1
))
6045 tcc_error("invalid type for cast");
6052 if (!parse_btype(&type1
, &ad1
))
6054 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6056 if (!is_assignable_types(type
, &type1
))
6057 tcc_error("invalid type for cast");
6066 if (first
|| tok
== '{') {
6075 while (tok
!= '}') {
6076 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
6078 if (!size_only
&& array_length
< index
) {
6079 init_putz(type
, sec
, c
+ array_length
,
6080 index
- array_length
);
6082 index
= index
+ type_size(&f
->type
, &align1
);
6083 if (index
> array_length
)
6084 array_length
= index
;
6086 /* gr: skip fields from same union - ugly. */
6089 int f_size
= type_size(&f
->type
, &align
);
6090 int f_type
= (f
->type
.t
& VT_BTYPE
);
6092 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
6093 /* test for same offset */
6094 if (f
->next
->c
!= f
->c
)
6096 if ((f_type
== VT_STRUCT
) && (f_size
== 0)) {
6098 Lets assume a structure of size 0 can't be a member of the union.
6099 This allow to compile the following code from a linux kernel v2.4.26
6100 typedef struct { } rwlock_t;
6106 struct fs_struct init_fs = { { (1) }, (rwlock_t) {}, 0022, };
6107 tcc-0.9.23 can succesfully compile this version of the kernel.
6108 gcc don't have problems with this code too.
6112 /* if yes, test for bitfield shift */
6113 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
6114 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6115 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6116 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
6117 if (bit_pos_1
!= bit_pos_2
)
6124 if (no_oblock
&& f
== NULL
)
6130 /* put zeros at the end */
6131 if (!size_only
&& array_length
< n
) {
6132 init_putz(type
, sec
, c
+ array_length
,
6141 } else if (tok
== '{') {
6143 decl_initializer(type
, sec
, c
, first
, size_only
);
6145 } else if (size_only
) {
6146 /* just skip expression */
6147 parlevel
= parlevel1
= 0;
6148 while ((parlevel
> 0 || parlevel1
> 0 ||
6149 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
6152 else if (tok
== ')') {
6153 if (parlevel
== 0 && parlevel1
== 0)
6157 else if (tok
== '{')
6159 else if (tok
== '}') {
6160 if (parlevel
== 0 && parlevel1
== 0)
6167 /* currently, we always use constant expression for globals
6168 (may change for scripting case) */
6169 expr_type
= EXPR_CONST
;
6171 expr_type
= EXPR_ANY
;
6172 init_putv(type
, sec
, c
, 0, expr_type
);
6176 /* parse an initializer for type 't' if 'has_init' is non zero, and
6177 allocate space in local or global data space ('r' is either
6178 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
6179 variable 'v' of scope 'scope' is declared before initializers
6180 are parsed. If 'v' is zero, then a reference to the new object
6181 is put in the value stack. If 'has_init' is 2, a special parsing
6182 is done to handle string constants. */
6183 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
6184 int has_init
, int v
, int scope
)
6186 int size
, align
, addr
, data_offset
;
6188 ParseState saved_parse_state
= {0};
6189 TokenString
*init_str
= NULL
;
6191 Sym
*flexible_array
;
6193 flexible_array
= NULL
;
6194 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
6195 Sym
*field
= type
->ref
->next
;
6198 field
= field
->next
;
6199 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
6200 flexible_array
= field
;
6204 size
= type_size(type
, &align
);
6205 /* If unknown size, we must evaluate it before
6206 evaluating initializers because
6207 initializers can generate global data too
6208 (e.g. string pointers or ISOC99 compound
6209 literals). It also simplifies local
6210 initializers handling */
6211 if (size
< 0 || (flexible_array
&& has_init
)) {
6213 tcc_error("unknown type size");
6214 /* get all init string */
6215 init_str
= tok_str_alloc();
6216 if (has_init
== 2) {
6217 /* only get strings */
6218 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
6219 tok_str_add_tok(init_str
);
6224 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
6226 tcc_error("unexpected end of file in initializer");
6227 tok_str_add_tok(init_str
);
6230 else if (tok
== '}') {
6240 tok_str_add(init_str
, -1);
6241 tok_str_add(init_str
, 0);
6244 save_parse_state(&saved_parse_state
);
6246 begin_macro(init_str
, 1);
6248 decl_initializer(type
, NULL
, 0, 1, 1);
6249 /* prepare second initializer parsing */
6250 macro_ptr
= init_str
->str
;
6253 /* if still unknown size, error */
6254 size
= type_size(type
, &align
);
6256 tcc_error("unknown type size");
6258 /* If there's a flex member and it was used in the initializer
6260 if (flexible_array
&&
6261 flexible_array
->type
.ref
->c
> 0)
6262 size
+= flexible_array
->type
.ref
->c
6263 * pointed_size(&flexible_array
->type
);
6264 /* take into account specified alignment if bigger */
6265 if (ad
->a
.aligned
) {
6266 if (ad
->a
.aligned
> align
)
6267 align
= ad
->a
.aligned
;
6268 } else if (ad
->a
.packed
) {
6271 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
6273 #ifdef CONFIG_TCC_BCHECK
6274 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6278 loc
= (loc
- size
) & -align
;
6280 #ifdef CONFIG_TCC_BCHECK
6281 /* handles bounds */
6282 /* XXX: currently, since we do only one pass, we cannot track
6283 '&' operators, so we add only arrays */
6284 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6286 /* add padding between regions */
6288 /* then add local bound info */
6289 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(addr_t
));
6290 bounds_ptr
[0] = addr
;
6291 bounds_ptr
[1] = size
;
6295 /* local variable */
6296 sym_push(v
, type
, r
, addr
);
6298 /* push local reference */
6299 vset(type
, r
, addr
);
6305 if (v
&& scope
== VT_CONST
) {
6306 /* see if the symbol was already defined */
6309 if (!is_compatible_types(&sym
->type
, type
))
6310 tcc_error("incompatible types for redefinition of '%s'",
6311 get_tok_str(v
, NULL
));
6312 if (sym
->type
.t
& VT_EXTERN
) {
6313 /* if the variable is extern, it was not allocated */
6314 sym
->type
.t
&= ~VT_EXTERN
;
6315 /* set array size if it was omitted in extern
6317 if ((sym
->type
.t
& VT_ARRAY
) &&
6318 sym
->type
.ref
->c
< 0 &&
6320 sym
->type
.ref
->c
= type
->ref
->c
;
6322 /* we accept several definitions of the same
6323 global variable. this is tricky, because we
6324 must play with the SHN_COMMON type of the symbol */
6325 /* XXX: should check if the variable was already
6326 initialized. It is incorrect to initialized it
6328 /* no init data, we won't add more to the symbol */
6335 /* allocate symbol in corresponding section */
6340 else if (tcc_state
->nocommon
)
6344 data_offset
= sec
->data_offset
;
6345 data_offset
= (data_offset
+ align
- 1) & -align
;
6347 /* very important to increment global pointer at this time
6348 because initializers themselves can create new initializers */
6349 data_offset
+= size
;
6350 #ifdef CONFIG_TCC_BCHECK
6351 /* add padding if bound check */
6352 if (tcc_state
->do_bounds_check
)
6355 sec
->data_offset
= data_offset
;
6356 /* allocate section space to put the data */
6357 if (sec
->sh_type
!= SHT_NOBITS
&&
6358 data_offset
> sec
->data_allocated
)
6359 section_realloc(sec
, data_offset
);
6360 /* align section if needed */
6361 if (align
> sec
->sh_addralign
)
6362 sec
->sh_addralign
= align
;
6364 addr
= 0; /* avoid warning */
6368 if (scope
!= VT_CONST
|| !sym
) {
6369 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
6370 sym
->asm_label
= ad
->asm_label
;
6372 /* update symbol definition */
6374 put_extern_sym(sym
, sec
, addr
, size
);
6377 /* put a common area */
6378 put_extern_sym(sym
, NULL
, align
, size
);
6379 /* XXX: find a nicer way */
6380 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
6381 esym
->st_shndx
= SHN_COMMON
;
6384 /* push global reference */
6385 sym
= get_sym_ref(type
, sec
, addr
, size
);
6386 vpushsym(type
, sym
);
6388 /* patch symbol weakness */
6389 if (type
->t
& VT_WEAK
)
6391 apply_visibility(sym
, type
);
6392 #ifdef CONFIG_TCC_BCHECK
6393 /* handles bounds now because the symbol must be defined
6394 before for the relocation */
6395 if (tcc_state
->do_bounds_check
) {
6398 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
6399 /* then add global bound info */
6400 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(addr_t
));
6401 bounds_ptr
[0] = 0; /* relocated */
6402 bounds_ptr
[1] = size
;
6406 if (has_init
|| (type
->t
& VT_VLA
)) {
6407 decl_initializer(type
, sec
, addr
, 1, 0);
6408 /* patch flexible array member size back to -1, */
6409 /* for possible subsequent similar declarations */
6411 flexible_array
->type
.ref
->c
= -1;
6414 /* restore parse state if needed */
6417 restore_parse_state(&saved_parse_state
);
6421 static void put_func_debug(Sym
*sym
)
6426 /* XXX: we put here a dummy type */
6427 snprintf(buf
, sizeof(buf
), "%s:%c1",
6428 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
6429 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
6430 cur_text_section
, sym
->c
);
6431 /* //gr gdb wants a line at the function */
6432 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
6437 /* parse an old style function declaration list */
6438 /* XXX: check multiple parameter */
6439 static void func_decl_list(Sym
*func_sym
)
6446 /* parse each declaration */
6447 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
6448 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
6449 if (!parse_btype(&btype
, &ad
))
6450 expect("declaration list");
6451 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6452 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6454 /* we accept no variable after */
6458 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6459 /* find parameter in function parameter list */
6462 if ((s
->v
& ~SYM_FIELD
) == v
)
6466 tcc_error("declaration for parameter '%s' but no such parameter",
6467 get_tok_str(v
, NULL
));
6469 /* check that no storage specifier except 'register' was given */
6470 if (type
.t
& VT_STORAGE
)
6471 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
6472 convert_parameter_type(&type
);
6473 /* we can add the type (NOTE: it could be local to the function) */
6475 /* accept other parameters */
6486 /* parse a function defined by symbol 'sym' and generate its code in
6487 'cur_text_section' */
6488 static void gen_function(Sym
*sym
)
6490 int saved_nocode_wanted
= nocode_wanted
;
6493 ind
= cur_text_section
->data_offset
;
6494 /* NOTE: we patch the symbol size later */
6495 put_extern_sym(sym
, cur_text_section
, ind
, 0);
6496 funcname
= get_tok_str(sym
->v
, NULL
);
6498 /* Initialize VLA state */
6500 vla_sp_root_loc
= -1;
6501 /* put debug symbol */
6502 if (tcc_state
->do_debug
)
6503 put_func_debug(sym
);
6505 /* push a dummy symbol to enable local sym storage */
6506 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
6507 local_scope
= 1; /* for function parameters */
6508 gfunc_prolog(&sym
->type
);
6512 block(NULL
, NULL
, 0);
6515 cur_text_section
->data_offset
= ind
;
6516 label_pop(&global_label_stack
, NULL
);
6517 /* reset local stack */
6519 sym_pop(&local_stack
, NULL
);
6520 /* end of function */
6521 /* patch symbol size */
6522 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
6524 /* patch symbol weakness (this definition overrules any prototype) */
6525 if (sym
->type
.t
& VT_WEAK
)
6527 apply_visibility(sym
, &sym
->type
);
6528 if (tcc_state
->do_debug
) {
6529 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
6531 /* It's better to crash than to generate wrong code */
6532 cur_text_section
= NULL
;
6533 funcname
= ""; /* for safety */
6534 func_vt
.t
= VT_VOID
; /* for safety */
6535 func_var
= 0; /* for safety */
6536 ind
= 0; /* for safety */
6537 nocode_wanted
= saved_nocode_wanted
;
6541 static void gen_inline_functions(TCCState
*s
)
6544 int inline_generated
, i
, ln
;
6545 struct InlineFunc
*fn
;
6547 ln
= file
->line_num
;
6548 /* iterate while inline function are referenced */
6550 inline_generated
= 0;
6551 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6552 fn
= s
->inline_fns
[i
];
6554 if (sym
&& sym
->c
) {
6555 /* the function was used: generate its code and
6556 convert it to a normal function */
6559 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
6560 sym
->r
= VT_SYM
| VT_CONST
;
6561 sym
->type
.t
&= ~VT_INLINE
;
6563 begin_macro(fn
->func_str
, 1);
6565 cur_text_section
= text_section
;
6569 inline_generated
= 1;
6572 if (!inline_generated
)
6575 file
->line_num
= ln
;
6578 ST_FUNC
void free_inline_functions(TCCState
*s
)
6581 /* free tokens of unused inline functions */
6582 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6583 struct InlineFunc
*fn
= s
->inline_fns
[i
];
6585 tok_str_free(fn
->func_str
);
6587 dynarray_reset(&s
->inline_fns
, &s
->nb_inline_fns
);
6590 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
6591 static int decl0(int l
, int is_for_loop_init
)
6599 if (!parse_btype(&btype
, &ad
)) {
6600 if (is_for_loop_init
)
6602 /* skip redundant ';' */
6603 /* XXX: find more elegant solution */
6608 if (l
== VT_CONST
&&
6609 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6610 /* global asm block */
6614 /* special test for old K&R protos without explicit int
6615 type. Only accepted when defining global data */
6616 if (l
== VT_LOCAL
|| tok
< TOK_UIDENT
)
6620 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6621 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6623 if ((btype
.t
& VT_BTYPE
) == VT_STRUCT
) {
6624 int v
= btype
.ref
->v
;
6625 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) >= SYM_FIRST_ANOM
)
6626 tcc_warning("unnamed struct/union that defines no instances");
6631 while (1) { /* iterate thru each declaration */
6633 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6637 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
6638 printf("type = '%s'\n", buf
);
6641 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6642 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
6643 tcc_error("function without file scope cannot be static");
6645 /* if old style function prototype, we accept a
6648 if (sym
->c
== FUNC_OLD
)
6649 func_decl_list(sym
);
6652 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6653 ad
.asm_label
= asm_label_instr();
6654 /* parse one last attribute list, after asm label */
6655 parse_attribute(&ad
);
6662 #ifdef TCC_TARGET_PE
6663 if (ad
.a
.func_import
)
6664 type
.t
|= VT_IMPORT
;
6665 if (ad
.a
.func_export
)
6666 type
.t
|= VT_EXPORT
;
6668 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6672 tcc_error("cannot use local functions");
6673 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6674 expect("function definition");
6676 /* reject abstract declarators in function definition */
6678 while ((sym
= sym
->next
) != NULL
)
6679 if (!(sym
->v
& ~SYM_FIELD
))
6680 expect("identifier");
6682 /* XXX: cannot do better now: convert extern line to static inline */
6683 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6684 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6689 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6692 ref
= sym
->type
.ref
;
6693 if (0 == ref
->a
.func_proto
)
6694 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6696 /* use func_call from prototype if not defined */
6697 if (ref
->a
.func_call
!= FUNC_CDECL
6698 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6699 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6701 /* use export from prototype */
6702 if (ref
->a
.func_export
)
6703 type
.ref
->a
.func_export
= 1;
6705 /* use static from prototype */
6706 if (sym
->type
.t
& VT_STATIC
)
6707 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6709 /* If the definition has no visibility use the
6710 one from prototype. */
6711 if (! (type
.t
& VT_VIS_MASK
))
6712 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6714 if (!is_compatible_types(&sym
->type
, &type
)) {
6716 tcc_error("incompatible types for redefinition of '%s'",
6717 get_tok_str(v
, NULL
));
6719 type
.ref
->a
.func_proto
= 0;
6720 /* if symbol is already defined, then put complete type */
6723 /* put function symbol */
6724 sym
= global_identifier_push(v
, type
.t
, 0);
6725 sym
->type
.ref
= type
.ref
;
6728 /* static inline functions are just recorded as a kind
6729 of macro. Their code will be emitted at the end of
6730 the compilation unit only if they are used */
6731 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6732 (VT_INLINE
| VT_STATIC
)) {
6734 struct InlineFunc
*fn
;
6735 const char *filename
;
6737 filename
= file
? file
->filename
: "";
6738 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6739 strcpy(fn
->filename
, filename
);
6741 fn
->func_str
= tok_str_alloc();
6747 tcc_error("unexpected end of file");
6748 tok_str_add_tok(fn
->func_str
);
6753 } else if (t
== '}') {
6755 if (block_level
== 0)
6759 tok_str_add(fn
->func_str
, -1);
6760 tok_str_add(fn
->func_str
, 0);
6761 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6764 /* compute text section */
6765 cur_text_section
= ad
.section
;
6766 if (!cur_text_section
)
6767 cur_text_section
= text_section
;
6768 sym
->r
= VT_SYM
| VT_CONST
;
6773 if (btype
.t
& VT_TYPEDEF
) {
6774 /* save typedefed type */
6775 /* XXX: test storage specifiers ? */
6777 if (sym
&& sym
->scope
== local_scope
) {
6778 if (!is_compatible_types(&sym
->type
, &type
)
6779 || !(sym
->type
.t
& VT_TYPEDEF
))
6780 tcc_error("incompatible redefinition of '%s'",
6781 get_tok_str(v
, NULL
));
6784 sym
= sym_push(v
, &type
, 0, 0);
6787 sym
->type
.t
|= VT_TYPEDEF
;
6790 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6791 /* external function definition */
6792 /* specific case for func_call attribute */
6793 ad
.a
.func_proto
= 1;
6795 } else if (!(type
.t
& VT_ARRAY
)) {
6796 /* not lvalue if array */
6797 r
|= lvalue_type(type
.t
);
6799 has_init
= (tok
== '=');
6800 if (has_init
&& (type
.t
& VT_VLA
))
6801 tcc_error("Variable length array cannot be initialized");
6802 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6803 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6804 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6805 /* external variable or function */
6806 /* NOTE: as GCC, uninitialized global static
6807 arrays of null size are considered as
6809 sym
= external_sym(v
, &type
, r
);
6810 sym
->asm_label
= ad
.asm_label
;
6812 if (ad
.alias_target
) {
6817 alias_target
= sym_find(ad
.alias_target
);
6818 if (!alias_target
|| !alias_target
->c
)
6819 tcc_error("unsupported forward __alias__ attribute");
6820 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6821 tsec
.sh_num
= esym
->st_shndx
;
6822 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6825 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6826 if (type
.t
& VT_STATIC
)
6832 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, l
);
6836 if (is_for_loop_init
)
6849 ST_FUNC
void decl(int l
)
6854 /* ------------------------------------------------------------------------- */