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 ST_FUNC
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
);
3187 /* struct already defined ? return it */
3189 expect("struct/union/enum name");
3191 if (s
&& (s
->scope
== local_scope
|| (tok
!= '{' && tok
!= ';'))) {
3193 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
3201 /* we put an undefined size for struct/union */
3202 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
3203 s
->r
= 0; /* default alignment is zero as gcc */
3204 /* put struct/union/enum name in type */
3212 tcc_error("struct/union/enum already defined");
3213 /* cannot be empty */
3215 /* non empty enums are not allowed */
3216 if (a
== TOK_ENUM
) {
3220 expect("identifier");
3222 if (ss
&& !local_stack
)
3223 tcc_error("redefinition of enumerator '%s'",
3224 get_tok_str(v
, NULL
));
3230 /* enum symbols have static storage */
3231 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
3232 ss
->type
.t
|= VT_STATIC
;
3237 /* NOTE: we accept a trailing comma */
3241 s
->c
= type_size(&int_type
, &align
);
3250 while (tok
!= '}') {
3251 if (!parse_btype(&btype
, &ad1
)) {
3258 tcc_error("flexible array member '%s' not at the end of struct",
3259 get_tok_str(v
, NULL
));
3264 type_decl(&type1
, &ad1
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3266 if ((type1
.t
& VT_BTYPE
) != VT_STRUCT
)
3267 expect("identifier");
3269 int v
= btype
.ref
->v
;
3270 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
3271 if (tcc_state
->ms_extensions
== 0)
3272 expect("identifier");
3276 if (type_size(&type1
, &align
) < 0) {
3277 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
3280 tcc_error("field '%s' has incomplete type",
3281 get_tok_str(v
, NULL
));
3283 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
3284 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
3285 tcc_error("invalid type for '%s'",
3286 get_tok_str(v
, NULL
));
3290 bit_size
= expr_const();
3291 /* XXX: handle v = 0 case for messages */
3293 tcc_error("negative width in bit-field '%s'",
3294 get_tok_str(v
, NULL
));
3295 if (v
&& bit_size
== 0)
3296 tcc_error("zero width for bit-field '%s'",
3297 get_tok_str(v
, NULL
));
3299 size
= type_size(&type1
, &align
);
3300 if (ad1
.a
.aligned
) {
3301 if (align
< ad1
.a
.aligned
)
3302 align
= ad1
.a
.aligned
;
3303 } else if (ad1
.a
.packed
|| ad
->a
.packed
) {
3305 } else if (*tcc_state
->pack_stack_ptr
) {
3306 if (align
> *tcc_state
->pack_stack_ptr
)
3307 align
= *tcc_state
->pack_stack_ptr
;
3310 if (bit_size
>= 0) {
3311 bt
= type1
.t
& VT_BTYPE
;
3318 tcc_error("bitfields must have scalar type");
3320 if (bit_size
> bsize
) {
3321 tcc_error("width of '%s' exceeds its type",
3322 get_tok_str(v
, NULL
));
3323 } else if (bit_size
== bsize
) {
3324 /* no need for bit fields */
3326 } else if (bit_size
== 0) {
3327 /* XXX: what to do if only padding in a
3329 /* zero size: means to pad */
3332 /* if type change, union, or will overrun
3333 * allignment slot, start at a newly
3335 if ((bit_pos
+ bit_size
) > bsize
||
3336 bt
!= prevbt
|| a
== TOK_UNION
)
3339 /* XXX: handle LSB first */
3340 type1
.t
|= VT_BITFIELD
|
3341 (bit_pos
<< VT_STRUCT_SHIFT
) |
3342 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
3343 bit_pos
+= bit_size
;
3344 /* without ms-bitfields, allocate the
3345 * minimum number of bytes necessary,
3346 * adding single bytes as needed */
3347 if (!tcc_state
->ms_bitfields
) {
3349 /* minimum bytes for new bitfield */
3350 size
= (bit_size
+ 7) / 8;
3352 /* enough spare bits already allocated? */
3353 bit_size
= (lbit_pos
- 1) % 8 + 1 + bit_size
;
3354 if (bit_size
> 8) /* doesn't fit */
3355 extra_bytes
= (bit_size
- 1) / 8;
3363 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3364 /* add new memory data only if starting bit
3365 field or adding bytes to existing bit field */
3366 if (extra_bytes
) c
+= extra_bytes
;
3367 else if (lbit_pos
== 0) {
3368 if (a
== TOK_STRUCT
) {
3369 c
= (c
+ align
- 1) & -align
;
3378 if (align
> maxalign
)
3382 printf("add field %s offset=%d",
3383 get_tok_str(v
, NULL
), offset
);
3384 if (type1
.t
& VT_BITFIELD
) {
3385 printf(" pos=%d size=%d",
3386 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3387 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3392 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3394 while ((ass
= ass
->next
) != NULL
) {
3395 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3400 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3404 if (tok
== ';' || tok
== TOK_EOF
)
3411 /* store size and alignment */
3412 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3418 /* return 1 if basic type is a type size (short, long, long long) */
3419 ST_FUNC
int is_btype_size(int bt
)
3421 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3424 /* Add type qualifiers to a type. If the type is an array then the qualifiers
3425 are added to the element type, copied because it could be a typedef. */
3426 static void parse_btype_qualify(CType
*type
, int qualifiers
)
3428 while (type
->t
& VT_ARRAY
) {
3429 type
->ref
= sym_push(SYM_FIELD
, &type
->ref
->type
, 0, type
->ref
->c
);
3430 type
= &type
->ref
->type
;
3432 type
->t
|= qualifiers
;
3435 /* return 0 if no type declaration. otherwise, return the basic type
3438 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3440 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3444 memset(ad
, 0, sizeof(AttributeDef
));
3452 /* currently, we really ignore extension */
3463 tcc_error("too many basic types");
3465 bt_size
= is_btype_size (u
& VT_BTYPE
);
3466 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3481 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3482 #ifndef TCC_TARGET_PE
3483 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3485 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3486 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3492 #ifdef TCC_TARGET_ARM64
3494 /* GCC's __uint128_t appears in some Linux header files. Make it a
3495 synonym for long double to get the size and alignment right. */
3507 if ((t
& VT_BTYPE
) == VT_LONG
) {
3508 #ifdef TCC_TARGET_PE
3509 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3511 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3519 struct_decl(&type1
, ad
, VT_ENUM
);
3522 type
->ref
= type1
.ref
;
3526 struct_decl(&type1
, ad
, VT_STRUCT
);
3529 /* type modifiers */
3534 parse_btype_qualify(type
, VT_CONSTANT
);
3542 parse_btype_qualify(type
, VT_VOLATILE
);
3549 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3550 tcc_error("signed and unsigned modifier");
3563 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3564 tcc_error("signed and unsigned modifier");
3565 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3590 /* GNUC attribute */
3591 case TOK_ATTRIBUTE1
:
3592 case TOK_ATTRIBUTE2
:
3593 parse_attribute(ad
);
3596 t
= (t
& ~VT_BTYPE
) | u
;
3604 parse_expr_type(&type1
);
3605 /* remove all storage modifiers except typedef */
3606 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3612 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3615 type
->t
= ((s
->type
.t
& ~VT_TYPEDEF
) |
3616 (t
& ~(VT_CONSTANT
| VT_VOLATILE
)));
3617 type
->ref
= s
->type
.ref
;
3618 if (t
& (VT_CONSTANT
| VT_VOLATILE
))
3619 parse_btype_qualify(type
, t
& (VT_CONSTANT
| VT_VOLATILE
));
3623 /* get attributes from typedef */
3624 if (0 == ad
->a
.aligned
)
3625 ad
->a
.aligned
= s
->a
.aligned
;
3626 if (0 == ad
->a
.func_call
)
3627 ad
->a
.func_call
= s
->a
.func_call
;
3628 ad
->a
.packed
|= s
->a
.packed
;
3637 if (tcc_state
->char_is_unsigned
) {
3638 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3642 /* long is never used as type */
3643 if ((t
& VT_BTYPE
) == VT_LONG
)
3644 #if (!defined TCC_TARGET_X86_64 && !defined TCC_TARGET_ARM64) || \
3645 defined TCC_TARGET_PE
3646 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3648 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3654 /* convert a function parameter type (array to pointer and function to
3655 function pointer) */
3656 static inline void convert_parameter_type(CType
*pt
)
3658 /* remove const and volatile qualifiers (XXX: const could be used
3659 to indicate a const function parameter */
3660 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3661 /* array must be transformed to pointer according to ANSI C */
3663 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3668 ST_FUNC
void parse_asm_str(CString
*astr
)
3671 parse_mult_str(astr
, "string constant");
3674 /* Parse an asm label and return the token */
3675 static int asm_label_instr(void)
3681 parse_asm_str(&astr
);
3684 printf("asm_alias: \"%s\"\n", (char *)astr
.data
);
3686 v
= tok_alloc(astr
.data
, astr
.size
- 1)->tok
;
3691 static void post_type(CType
*type
, AttributeDef
*ad
)
3693 int n
, l
, t1
, arg_size
, align
;
3694 Sym
**plast
, *s
, *first
;
3699 /* function declaration */
3707 /* read param name and compute offset */
3708 if (l
!= FUNC_OLD
) {
3709 if (!parse_btype(&pt
, &ad1
)) {
3711 tcc_error("invalid type");
3718 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3720 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3721 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3722 tcc_error("parameter declared as void");
3723 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3728 expect("identifier");
3732 convert_parameter_type(&pt
);
3733 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3739 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3746 /* if no parameters, then old type prototype */
3750 /* NOTE: const is ignored in returned type as it has a special
3751 meaning in gcc / C++ */
3752 type
->t
&= ~VT_CONSTANT
;
3753 /* some ancient pre-K&R C allows a function to return an array
3754 and the array brackets to be put after the arguments, such
3755 that "int c()[]" means something like "int[] c()" */
3758 skip(']'); /* only handle simple "[]" */
3761 /* we push a anonymous symbol which will contain the function prototype */
3762 ad
->a
.func_args
= arg_size
;
3763 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3768 } else if (tok
== '[') {
3769 /* array definition */
3771 if (tok
== TOK_RESTRICT1
)
3776 if (!local_stack
|| nocode_wanted
)
3777 vpushi(expr_const());
3779 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3782 tcc_error("invalid array size");
3784 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3785 tcc_error("size of variable length array should be an integer");
3790 /* parse next post type */
3791 post_type(type
, ad
);
3792 if (type
->t
== VT_FUNC
)
3793 tcc_error("declaration of an array of functions");
3794 t1
|= type
->t
& VT_VLA
;
3797 loc
-= type_size(&int_type
, &align
);
3801 vla_runtime_type_size(type
, &align
);
3803 vset(&int_type
, VT_LOCAL
|VT_LVAL
, n
);
3810 /* we push an anonymous symbol which will contain the array
3812 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3813 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3818 /* Parse a type declaration (except basic type), and return the type
3819 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3820 expected. 'type' should contain the basic type. 'ad' is the
3821 attribute definition of the basic type. It can be modified by
3824 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3827 CType type1
, *type2
;
3828 int qualifiers
, storage
;
3830 while (tok
== '*') {
3838 qualifiers
|= VT_CONSTANT
;
3843 qualifiers
|= VT_VOLATILE
;
3851 type
->t
|= qualifiers
;
3854 /* XXX: clarify attribute handling */
3855 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3856 parse_attribute(ad
);
3858 /* recursive type */
3859 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3860 type1
.t
= 0; /* XXX: same as int */
3863 /* XXX: this is not correct to modify 'ad' at this point, but
3864 the syntax is not clear */
3865 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3866 parse_attribute(ad
);
3867 type_decl(&type1
, ad
, v
, td
);
3870 /* type identifier */
3871 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3875 if (!(td
& TYPE_ABSTRACT
))
3876 expect("identifier");
3880 storage
= type
->t
& VT_STORAGE
;
3881 type
->t
&= ~VT_STORAGE
;
3882 if (storage
& VT_STATIC
) {
3883 int saved_nocode_wanted
= nocode_wanted
;
3885 post_type(type
, ad
);
3886 nocode_wanted
= saved_nocode_wanted
;
3888 post_type(type
, ad
);
3890 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3891 parse_attribute(ad
);
3895 /* append type at the end of type1 */
3908 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3909 ST_FUNC
int lvalue_type(int t
)
3914 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3916 else if (bt
== VT_SHORT
)
3920 if (t
& VT_UNSIGNED
)
3921 r
|= VT_LVAL_UNSIGNED
;
3925 /* indirection with full error checking and bound check */
3926 ST_FUNC
void indir(void)
3928 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3929 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3933 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3935 vtop
->type
= *pointed_type(&vtop
->type
);
3936 /* Arrays and functions are never lvalues */
3937 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3938 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3939 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3940 /* if bound checking, the referenced pointer must be checked */
3941 #ifdef CONFIG_TCC_BCHECK
3942 if (tcc_state
->do_bounds_check
)
3943 vtop
->r
|= VT_MUSTBOUND
;
3948 /* pass a parameter to a function and do type checking and casting */
3949 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3954 func_type
= func
->c
;
3955 if (func_type
== FUNC_OLD
||
3956 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3957 /* default casting : only need to convert float to double */
3958 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3961 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3962 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3965 } else if (arg
== NULL
) {
3966 tcc_error("too many arguments to function");
3969 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3970 gen_assign_cast(&type
);
3974 /* parse an expression of the form '(type)' or '(expr)' and return its
3976 static void parse_expr_type(CType
*type
)
3982 if (parse_btype(type
, &ad
)) {
3983 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3990 static void parse_type(CType
*type
)
3995 if (!parse_btype(type
, &ad
)) {
3998 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
4001 static void vpush_tokc(int t
)
4006 vsetc(&type
, VT_CONST
, &tokc
);
4009 ST_FUNC
void unary(void)
4011 int n
, t
, align
, size
, r
, sizeof_caller
;
4016 sizeof_caller
= in_sizeof
;
4018 /* XXX: GCC 2.95.3 does not generate a table although it should be
4032 vpush_tokc(VT_INT
| VT_UNSIGNED
);
4036 vpush_tokc(VT_LLONG
);
4040 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
4044 vpush_tokc(VT_FLOAT
);
4048 vpush_tokc(VT_DOUBLE
);
4052 vpush_tokc(VT_LDOUBLE
);
4055 case TOK___FUNCTION__
:
4057 goto tok_identifier
;
4063 /* special function name identifier */
4064 len
= strlen(funcname
) + 1;
4065 /* generate char[len] type */
4070 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
4071 ptr
= section_ptr_add(data_section
, len
);
4072 memcpy(ptr
, funcname
, len
);
4077 #ifdef TCC_TARGET_PE
4078 t
= VT_SHORT
| VT_UNSIGNED
;
4084 /* string parsing */
4087 if (tcc_state
->warn_write_strings
)
4092 memset(&ad
, 0, sizeof(AttributeDef
));
4093 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
4098 if (parse_btype(&type
, &ad
)) {
4099 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
4101 /* check ISOC99 compound literal */
4103 /* data is allocated locally by default */
4108 /* all except arrays are lvalues */
4109 if (!(type
.t
& VT_ARRAY
))
4110 r
|= lvalue_type(type
.t
);
4111 memset(&ad
, 0, sizeof(AttributeDef
));
4112 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
4114 if (sizeof_caller
) {
4121 } else if (tok
== '{') {
4123 tcc_error("expected constant");
4124 /* save all registers */
4127 /* statement expression : we do not accept break/continue
4128 inside as GCC does */
4129 block(NULL
, NULL
, 1);
4144 /* functions names must be treated as function pointers,
4145 except for unary '&' and sizeof. Since we consider that
4146 functions are not lvalues, we only have to handle it
4147 there and in function calls. */
4148 /* arrays can also be used although they are not lvalues */
4149 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
4150 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
4152 mk_pointer(&vtop
->type
);
4158 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4160 boolean
.t
= VT_BOOL
;
4162 vtop
->c
.i
= !vtop
->c
.i
;
4163 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
4167 vseti(VT_JMP
, gvtst(1, 0));
4179 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
4180 tcc_error("pointer not accepted for unary plus");
4181 /* In order to force cast, we add zero, except for floating point
4182 where we really need an noop (otherwise -0.0 will be transformed
4184 if (!is_float(vtop
->type
.t
)) {
4195 unary_type(&type
); // Perform a in_sizeof = 0;
4196 size
= type_size(&type
, &align
);
4197 if (t
== TOK_SIZEOF
) {
4198 if (!(type
.t
& VT_VLA
)) {
4200 tcc_error("sizeof applied to an incomplete type");
4203 vla_runtime_type_size(&type
, &align
);
4208 vtop
->type
.t
|= VT_UNSIGNED
;
4211 case TOK_builtin_expect
:
4213 /* __builtin_expect is a no-op for now */
4214 int saved_nocode_wanted
;
4219 saved_nocode_wanted
= nocode_wanted
;
4223 nocode_wanted
= saved_nocode_wanted
;
4227 case TOK_builtin_types_compatible_p
:
4236 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4237 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4238 vpushi(is_compatible_types(&type1
, &type2
));
4241 case TOK_builtin_constant_p
:
4243 int saved_nocode_wanted
, res
;
4246 saved_nocode_wanted
= nocode_wanted
;
4249 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
4251 nocode_wanted
= saved_nocode_wanted
;
4256 case TOK_builtin_frame_address
:
4257 case TOK_builtin_return_address
:
4264 if (tok
!= TOK_CINT
) {
4265 tcc_error("%s only takes positive integers",
4266 tok1
== TOK_builtin_return_address
?
4267 "__builtin_return_address" :
4268 "__builtin_frame_address");
4270 level
= (uint32_t)tokc
.i
;
4275 vset(&type
, VT_LOCAL
, 0); /* local frame */
4277 mk_pointer(&vtop
->type
);
4278 indir(); /* -> parent frame */
4280 if (tok1
== TOK_builtin_return_address
) {
4281 // assume return address is just above frame pointer on stack
4284 mk_pointer(&vtop
->type
);
4289 #ifdef TCC_TARGET_X86_64
4290 #ifdef TCC_TARGET_PE
4291 case TOK_builtin_va_start
:
4299 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4300 tcc_error("__builtin_va_start expects a local variable");
4301 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
4302 vtop
->type
= char_pointer_type
;
4308 case TOK_builtin_va_arg_types
:
4315 vpushi(classify_x86_64_va_arg(&type
));
4321 #ifdef TCC_TARGET_ARM64
4322 case TOK___va_start
: {
4324 tcc_error("statement in global scope");
4334 vtop
->type
.t
= VT_VOID
;
4337 case TOK___va_arg
: {
4340 tcc_error("statement in global scope");
4352 case TOK___arm64_clear_cache
: {
4361 vtop
->type
.t
= VT_VOID
;
4365 /* pre operations */
4376 t
= vtop
->type
.t
& VT_BTYPE
;
4378 /* In IEEE negate(x) isn't subtract(0,x), but rather
4383 else if (t
== VT_DOUBLE
)
4394 goto tok_identifier
;
4396 /* allow to take the address of a label */
4397 if (tok
< TOK_UIDENT
)
4398 expect("label identifier");
4399 s
= label_find(tok
);
4401 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4403 if (s
->r
== LABEL_DECLARED
)
4404 s
->r
= LABEL_FORWARD
;
4407 s
->type
.t
= VT_VOID
;
4408 mk_pointer(&s
->type
);
4409 s
->type
.t
|= VT_STATIC
;
4411 vpushsym(&s
->type
, s
);
4415 // special qnan , snan and infinity values
4417 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
4421 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
4425 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
4434 expect("identifier");
4437 const char *name
= get_tok_str(t
, NULL
);
4439 tcc_error("'%s' undeclared", name
);
4440 /* for simple function calls, we tolerate undeclared
4441 external reference to int() function */
4442 if (tcc_state
->warn_implicit_function_declaration
4443 #ifdef TCC_TARGET_PE
4444 /* people must be warned about using undeclared WINAPI functions
4445 (which usually start with uppercase letter) */
4446 || (name
[0] >= 'A' && name
[0] <= 'Z')
4449 tcc_warning("implicit declaration of function '%s'", name
);
4450 s
= external_global_sym(t
, &func_old_type
, 0);
4452 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
4453 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
4454 /* if referencing an inline function, then we generate a
4455 symbol to it if not already done. It will have the
4456 effect to generate code for it at the end of the
4457 compilation unit. Inline function as always
4458 generated in the text section. */
4460 put_extern_sym(s
, text_section
, 0, 0);
4461 r
= VT_SYM
| VT_CONST
;
4465 vset(&s
->type
, r
, s
->c
);
4466 /* if forward reference, we must point to s */
4467 if (vtop
->r
& VT_SYM
) {
4474 /* post operations */
4476 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4479 } else if (tok
== '.' || tok
== TOK_ARROW
|| tok
== TOK_CDOUBLE
) {
4482 if (tok
== TOK_ARROW
)
4484 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4487 /* expect pointer on structure */
4488 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4489 expect("struct or union");
4490 if (tok
== TOK_CDOUBLE
)
4491 expect("field name");
4493 if (tok
== TOK_CINT
|| tok
== TOK_CUINT
)
4494 expect("field name");
4498 while ((s
= s
->next
) != NULL
) {
4503 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, &tokc
));
4504 /* add field offset to pointer */
4505 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4508 /* change type to field type, and set to lvalue */
4509 vtop
->type
= s
->type
;
4510 vtop
->type
.t
|= qualifiers
;
4511 /* an array is never an lvalue */
4512 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4513 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4514 #ifdef CONFIG_TCC_BCHECK
4515 /* if bound checking, the referenced pointer must be checked */
4516 if (tcc_state
->do_bounds_check
&& (vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4517 vtop
->r
|= VT_MUSTBOUND
;
4521 } else if (tok
== '[') {
4527 } else if (tok
== '(') {
4530 int nb_args
, ret_nregs
, ret_align
, regsize
, variadic
;
4533 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4534 /* pointer test (no array accepted) */
4535 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4536 vtop
->type
= *pointed_type(&vtop
->type
);
4537 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4541 expect("function pointer");
4544 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4546 /* get return type */
4549 sa
= s
->next
; /* first parameter */
4552 /* compute first implicit argument if a structure is returned */
4553 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4554 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4555 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4556 &ret_align
, ®size
);
4558 /* get some space for the returned structure */
4559 size
= type_size(&s
->type
, &align
);
4560 #ifdef TCC_TARGET_ARM64
4561 /* On arm64, a small struct is return in registers.
4562 It is much easier to write it to memory if we know
4563 that we are allowed to write some extra bytes, so
4564 round the allocated space up to a power of 2: */
4566 while (size
& (size
- 1))
4567 size
= (size
| (size
- 1)) + 1;
4569 loc
= (loc
- size
) & -align
;
4571 ret
.r
= VT_LOCAL
| VT_LVAL
;
4572 /* pass it as 'int' to avoid structure arg passing
4574 vseti(VT_LOCAL
, loc
);
4584 /* return in register */
4585 if (is_float(ret
.type
.t
)) {
4586 ret
.r
= reg_fret(ret
.type
.t
);
4587 #ifdef TCC_TARGET_X86_64
4588 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4592 #ifndef TCC_TARGET_ARM64
4593 #ifdef TCC_TARGET_X86_64
4594 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4596 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4607 gfunc_param_typed(s
, sa
);
4617 tcc_error("too few arguments to function");
4619 if (!nocode_wanted
) {
4620 gfunc_call(nb_args
);
4622 vtop
-= (nb_args
+ 1);
4626 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4627 vsetc(&ret
.type
, r
, &ret
.c
);
4628 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4631 /* handle packed struct return */
4632 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4635 size
= type_size(&s
->type
, &align
);
4636 /* We're writing whole regs often, make sure there's enough
4637 space. Assume register size is power of 2. */
4638 if (regsize
> align
)
4640 loc
= (loc
- size
) & -align
;
4644 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4648 if (--ret_nregs
== 0)
4652 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4660 ST_FUNC
void expr_prod(void)
4665 while (tok
== '*' || tok
== '/' || tok
== '%') {
4673 ST_FUNC
void expr_sum(void)
4678 while (tok
== '+' || tok
== '-') {
4686 static void expr_shift(void)
4691 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4699 static void expr_cmp(void)
4704 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4705 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4713 static void expr_cmpeq(void)
4718 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4726 static void expr_and(void)
4729 while (tok
== '&') {
4736 static void expr_xor(void)
4739 while (tok
== '^') {
4746 static void expr_or(void)
4749 while (tok
== '|') {
4756 /* XXX: fix this mess */
4757 static void expr_land_const(void)
4760 while (tok
== TOK_LAND
) {
4766 static void expr_lor_const(void)
4769 while (tok
== TOK_LOR
) {
4776 static void expr_land(void)
4779 if (tok
== TOK_LAND
) {
4780 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4791 int saved_nocode_wanted
= nocode_wanted
;
4795 nocode_wanted
= saved_nocode_wanted
;
4803 if (tok
!= TOK_LAND
) {
4814 static void expr_lor(void)
4817 if (tok
== TOK_LOR
) {
4818 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4825 int saved_nocode_wanted
= nocode_wanted
;
4829 nocode_wanted
= saved_nocode_wanted
;
4841 if (tok
!= TOK_LOR
) {
4852 static void expr_cond(void)
4854 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
, islv
;
4856 CType type
, type1
, type2
;
4861 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4862 int saved_nocode_wanted
= nocode_wanted
;
4865 boolean
.t
= VT_BOOL
;
4871 if (tok
!= ':' || !gnu_ext
) {
4879 nocode_wanted
= saved_nocode_wanted
;
4882 if (tok
!= ':' || !gnu_ext
) {
4886 nocode_wanted
= saved_nocode_wanted
;
4893 if (vtop
!= vstack
) {
4894 /* needed to avoid having different registers saved in
4896 if (is_float(vtop
->type
.t
)) {
4898 #ifdef TCC_TARGET_X86_64
4899 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4909 if (tok
== ':' && gnu_ext
) {
4917 sv
= *vtop
; /* save value to handle it later */
4918 vtop
--; /* no vpop so that FP stack is not flushed */
4926 bt1
= t1
& VT_BTYPE
;
4928 bt2
= t2
& VT_BTYPE
;
4929 /* cast operands to correct type according to ISOC rules */
4930 if (is_float(bt1
) || is_float(bt2
)) {
4931 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4932 type
.t
= VT_LDOUBLE
;
4933 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4938 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4939 /* cast to biggest op */
4941 /* convert to unsigned if it does not fit in a long long */
4942 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4943 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4944 type
.t
|= VT_UNSIGNED
;
4945 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4946 /* If one is a null ptr constant the result type
4948 if (is_null_pointer (vtop
))
4950 else if (is_null_pointer (&sv
))
4952 /* XXX: test pointer compatibility, C99 has more elaborate
4956 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4957 /* XXX: test function pointer compatibility */
4958 type
= bt1
== VT_FUNC
? type1
: type2
;
4959 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4960 /* XXX: test structure compatibility */
4961 type
= bt1
== VT_STRUCT
? type1
: type2
;
4962 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4963 /* NOTE: as an extension, we accept void on only one side */
4966 /* integer operations */
4968 /* convert to unsigned if it does not fit in an integer */
4969 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4970 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4971 type
.t
|= VT_UNSIGNED
;
4973 /* keep structs lvalue by transforming `(expr ? a : b)` to `*(expr ? &a : &b)` so
4974 that `(expr ? a : b).mem` does not error with "lvalue expected" */
4975 islv
= (vtop
->r
& VT_LVAL
) && (sv
.r
& VT_LVAL
) && VT_STRUCT
== (type
.t
& VT_BTYPE
);
4977 /* now we convert second operand */
4980 mk_pointer(&vtop
->type
);
4983 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4986 if (is_float(type
.t
)) {
4988 #ifdef TCC_TARGET_X86_64
4989 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4993 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4994 /* for long longs, we use fixed registers to avoid having
4995 to handle a complicated move */
5000 /* this is horrible, but we must also convert first
5004 /* put again first value and cast it */
5008 mk_pointer(&vtop
->type
);
5011 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
5014 move_reg(r2
, r1
, type
.t
);
5023 static void expr_eq(void)
5029 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
5030 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
5031 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
5046 ST_FUNC
void gexpr(void)
5057 /* parse an expression and return its type without any side effect. */
5058 static void expr_type(CType
*type
)
5060 int saved_nocode_wanted
;
5062 saved_nocode_wanted
= nocode_wanted
;
5067 nocode_wanted
= saved_nocode_wanted
;
5070 /* parse a unary expression and return its type without any side
5072 static void unary_type(CType
*type
)
5084 /* parse a constant expression and return value in vtop. */
5085 static void expr_const1(void)
5094 /* parse an integer constant and return its value. */
5095 ST_FUNC
int expr_const(void)
5099 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
5100 expect("constant expression");
5106 /* return the label token if current token is a label, otherwise
5108 static int is_label(void)
5112 /* fast test first */
5113 if (tok
< TOK_UIDENT
)
5115 /* no need to save tokc because tok is an identifier */
5122 unget_tok(last_tok
);
5127 static void label_or_decl(int l
)
5131 /* fast test first */
5132 if (tok
>= TOK_UIDENT
)
5134 /* no need to save tokc because tok is an identifier */
5138 unget_tok(last_tok
);
5141 unget_tok(last_tok
);
5146 static int case_cmp(const void *pa
, const void *pb
)
5148 int a
= (*(struct case_t
**) pa
)->v1
;
5149 int b
= (*(struct case_t
**) pb
)->v1
;
5150 return a
< b
? -1 : a
> b
;
5153 static int gcase(struct case_t
**base
, int len
, int case_reg
, int *bsym
)
5165 case_reg
= gv(RC_INT
);
5171 gtst_addr(0, p
->sym
); /* v1 <= x <= v2 */
5172 case_reg
= gv(RC_INT
);
5175 case_reg
= gcase(base
, len
/2, case_reg
, bsym
);
5176 if (cur_switch
->def_sym
)
5177 gjmp_addr(cur_switch
->def_sym
);
5179 *bsym
= gjmp(*bsym
);
5183 base
+= e
; len
-= e
;
5191 if (p
->v1
== p
->v2
) {
5193 gtst_addr(0, p
->sym
);
5197 case_reg
= gv(RC_INT
);
5203 gtst_addr(0, p
->sym
);
5206 case_reg
= gv(RC_INT
);
5212 static void block(int *bsym
, int *csym
, int is_expr
)
5217 /* generate line number info */
5218 if (tcc_state
->do_debug
&&
5219 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
5220 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
5222 last_line_num
= file
->line_num
;
5226 /* default return value is (void) */
5228 vtop
->type
.t
= VT_VOID
;
5231 if (tok
== TOK_IF
) {
5238 block(bsym
, csym
, 0);
5240 if (c
== TOK_ELSE
) {
5244 block(bsym
, csym
, 0);
5245 gsym(d
); /* patch else jmp */
5248 } else if (tok
== TOK_WHILE
) {
5264 } else if (tok
== '{') {
5266 int block_vla_sp_loc
= vla_sp_loc
, saved_vlas_in_scope
= vlas_in_scope
;
5269 /* record local declaration stack position */
5271 llabel
= local_label_stack
;
5274 /* handle local labels declarations */
5275 if (tok
== TOK_LABEL
) {
5278 if (tok
< TOK_UIDENT
)
5279 expect("label identifier");
5280 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
5290 while (tok
!= '}') {
5291 label_or_decl(VT_LOCAL
);
5295 block(bsym
, csym
, is_expr
);
5298 /* pop locally defined labels */
5299 label_pop(&local_label_stack
, llabel
);
5301 /* XXX: this solution makes only valgrind happy...
5302 triggered by gcc.c-torture/execute/20000917-1.c */
5304 switch(vtop
->type
.t
& VT_BTYPE
) {
5306 /* this breaks a compilation of the linux kernel v2.4.26 */
5307 /* pmd_t *new = ({ __asm__ __volatile__("ud2\n") ; ((pmd_t *)1); }); */
5308 /* Look a commit a80acab: Display error on statement expressions with complex return type */
5309 /* A pointer is not a complex return type */
5313 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
5315 tcc_error("unsupported expression type");
5318 /* pop locally defined symbols */
5320 sym_pop(&local_stack
, s
);
5322 /* Pop VLA frames and restore stack pointer if required */
5323 if (vlas_in_scope
> saved_vlas_in_scope
) {
5324 vla_sp_loc
= saved_vlas_in_scope
? block_vla_sp_loc
: vla_sp_root_loc
;
5327 vlas_in_scope
= saved_vlas_in_scope
;
5330 } else if (tok
== TOK_RETURN
) {
5334 gen_assign_cast(&func_vt
);
5335 #ifdef TCC_TARGET_ARM64
5336 // Perhaps it would be better to use this for all backends:
5339 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
5340 CType type
, ret_type
;
5341 int ret_align
, ret_nregs
, regsize
;
5342 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
5343 &ret_align
, ®size
);
5344 if (0 == ret_nregs
) {
5345 /* if returning structure, must copy it to implicit
5346 first pointer arg location */
5349 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
5352 /* copy structure value to pointer */
5355 /* returning structure packed into registers */
5356 int r
, size
, addr
, align
;
5357 size
= type_size(&func_vt
,&align
);
5358 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) ||
5359 (vtop
->c
.i
& (ret_align
-1)))
5360 && (align
& (ret_align
-1))) {
5361 loc
= (loc
- size
) & -ret_align
;
5364 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
5368 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
5370 vtop
->type
= ret_type
;
5371 if (is_float(ret_type
.t
))
5372 r
= rc_fret(ret_type
.t
);
5383 if (--ret_nregs
== 0)
5385 /* We assume that when a structure is returned in multiple
5386 registers, their classes are consecutive values of the
5389 vtop
->c
.i
+= regsize
;
5393 } else if (is_float(func_vt
.t
)) {
5394 gv(rc_fret(func_vt
.t
));
5399 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
5402 /* jump unless last stmt in top-level block */
5403 if (tok
!= '}' || local_scope
!= 1)
5405 } else if (tok
== TOK_BREAK
) {
5408 tcc_error("cannot break");
5409 *bsym
= gjmp(*bsym
);
5412 } else if (tok
== TOK_CONTINUE
) {
5415 tcc_error("cannot continue");
5416 vla_sp_restore_root();
5417 *csym
= gjmp(*csym
);
5420 } else if (tok
== TOK_FOR
) {
5427 /* c99 for-loop init decl? */
5428 if (!decl0(VT_LOCAL
, 1)) {
5429 /* no, regular for-loop init expr */
5461 sym_pop(&local_stack
, s
);
5464 if (tok
== TOK_DO
) {
5481 if (tok
== TOK_SWITCH
) {
5482 struct switch_t
*saved
, sw
;
5486 /* XXX: other types than integer */
5491 b
= gjmp(0); /* jump to first case */
5492 sw
.p
= NULL
; sw
.n
= 0; sw
.def_sym
= 0;
5496 a
= gjmp(a
); /* add implicit break */
5499 qsort(sw
.p
, sw
.n
, sizeof(void*), case_cmp
);
5500 for (b
= 1; b
< sw
.n
; b
++)
5501 if (sw
.p
[b
- 1]->v2
>= sw
.p
[b
]->v1
)
5502 tcc_error("duplicate case value");
5503 gcase(sw
.p
, sw
.n
, c
, &a
);
5505 gjmp_addr(sw
.def_sym
);
5506 dynarray_reset(&sw
.p
, &sw
.n
);
5511 if (tok
== TOK_CASE
) {
5512 struct case_t
*cr
= tcc_malloc(sizeof(struct case_t
));
5516 cr
->v1
= cr
->v2
= expr_const();
5517 if (gnu_ext
&& tok
== TOK_DOTS
) {
5519 cr
->v2
= expr_const();
5520 if (cr
->v2
< cr
->v1
)
5521 tcc_warning("empty case range");
5524 dynarray_add((void***) &cur_switch
->p
, &cur_switch
->n
, cr
);
5527 goto block_after_label
;
5529 if (tok
== TOK_DEFAULT
) {
5534 if (cur_switch
->def_sym
)
5535 tcc_error("too many 'default'");
5536 cur_switch
->def_sym
= ind
;
5538 goto block_after_label
;
5540 if (tok
== TOK_GOTO
) {
5542 if (tok
== '*' && gnu_ext
) {
5546 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
5549 } else if (tok
>= TOK_UIDENT
) {
5550 s
= label_find(tok
);
5551 /* put forward definition if needed */
5553 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
5555 if (s
->r
== LABEL_DECLARED
)
5556 s
->r
= LABEL_FORWARD
;
5558 vla_sp_restore_root();
5559 if (s
->r
& LABEL_FORWARD
)
5560 s
->jnext
= gjmp(s
->jnext
);
5562 gjmp_addr(s
->jnext
);
5565 expect("label identifier");
5568 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
5576 if (s
->r
== LABEL_DEFINED
)
5577 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
5579 s
->r
= LABEL_DEFINED
;
5581 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
5585 /* we accept this, but it is a mistake */
5588 tcc_warning("deprecated use of label at end of compound statement");
5592 block(bsym
, csym
, is_expr
);
5595 /* expression case */
5610 /* t is the array or struct type. c is the array or struct
5611 address. cur_index/cur_field is the pointer to the current
5612 value. 'size_only' is true if only size info is needed (only used
5614 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5615 int *cur_index
, Sym
**cur_field
,
5619 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5625 if (gnu_ext
&& (l
= is_label()) != 0)
5627 while (tok
== '[' || tok
== '.') {
5629 if (!(type
->t
& VT_ARRAY
))
5630 expect("array type");
5633 index
= expr_const();
5634 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5635 expect("invalid index");
5636 if (tok
== TOK_DOTS
&& gnu_ext
) {
5638 index_last
= expr_const();
5639 if (index_last
< 0 ||
5640 (s
->c
>= 0 && index_last
>= s
->c
) ||
5642 expect("invalid index");
5648 *cur_index
= index_last
;
5649 type
= pointed_type(type
);
5650 elem_size
= type_size(type
, &align
);
5651 c
+= index
* elem_size
;
5652 /* NOTE: we only support ranges for last designator */
5653 nb_elems
= index_last
- index
+ 1;
5654 if (nb_elems
!= 1) {
5663 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5664 expect("struct/union type");
5677 /* XXX: fix this mess by using explicit storage field */
5679 type1
.t
|= (type
->t
& ~VT_TYPE
);
5693 if (type
->t
& VT_ARRAY
) {
5695 type
= pointed_type(type
);
5696 c
+= index
* type_size(type
, &align
);
5700 tcc_error("too many field init");
5701 /* XXX: fix this mess by using explicit storage field */
5703 type1
.t
|= (type
->t
& ~VT_TYPE
);
5708 decl_initializer(type
, sec
, c
, 0, size_only
);
5710 /* XXX: make it more general */
5711 if (!size_only
&& nb_elems
> 1) {
5712 unsigned long c_end
;
5717 tcc_error("range init not supported yet for dynamic storage");
5718 c_end
= c
+ nb_elems
* elem_size
;
5719 if (c_end
> sec
->data_allocated
)
5720 section_realloc(sec
, c_end
);
5721 src
= sec
->data
+ c
;
5723 for(i
= 1; i
< nb_elems
; i
++) {
5725 memcpy(dst
, src
, elem_size
);
5731 #define EXPR_CONST 1
5734 /* store a value or an expression directly in global data or in local array */
5735 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5736 int v
, int expr_type
)
5738 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5740 unsigned long long bit_mask
;
5748 /* compound literals must be allocated globally in this case */
5749 saved_global_expr
= global_expr
;
5752 global_expr
= saved_global_expr
;
5753 /* NOTE: symbols are accepted */
5754 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5755 tcc_error("initializer element is not constant");
5763 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5766 /* XXX: not portable */
5767 /* XXX: generate error if incorrect relocation */
5768 gen_assign_cast(&dtype
);
5769 bt
= type
->t
& VT_BTYPE
;
5770 /* we'll write at most 16 bytes */
5771 if (c
+ 16 > sec
->data_allocated
) {
5772 section_realloc(sec
, c
+ 16);
5774 ptr
= sec
->data
+ c
;
5775 /* XXX: make code faster ? */
5776 if (!(type
->t
& VT_BITFIELD
)) {
5778 bit_size
= PTR_SIZE
* 8;
5781 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5782 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5783 bit_mask
= (1LL << bit_size
) - 1;
5785 if ((vtop
->r
& VT_SYM
) &&
5791 (bt
== VT_LLONG
&& bit_size
!= 64) ||
5795 (bt
== VT_INT
&& bit_size
!= 32)
5798 tcc_error("initializer element is not computable at load time");
5800 /* XXX: when cross-compiling we assume that each type has the
5801 same representation on host and target, which is likely to
5802 be wrong in the case of long double */
5804 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5806 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5809 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5812 *(double *)ptr
= vtop
->c
.d
;
5815 if (sizeof(long double) == LDOUBLE_SIZE
)
5816 *(long double *)ptr
= vtop
->c
.ld
;
5817 else if (sizeof(double) == LDOUBLE_SIZE
)
5818 *(double *)ptr
= vtop
->c
.ld
;
5820 tcc_error("can't cross compile long double constants");
5824 *(long long *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5830 addr_t val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5831 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5832 if (vtop
->r
& VT_SYM
)
5833 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5835 *(addr_t
*)ptr
|= val
;
5837 if (vtop
->r
& VT_SYM
)
5838 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5839 *(addr_t
*)ptr
|= val
;
5844 int val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5845 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5846 if (vtop
->r
& VT_SYM
)
5847 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5851 if (vtop
->r
& VT_SYM
)
5852 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5860 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5867 /* put zeros for variable based init */
5868 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5871 /* nothing to do because globals are already set to zero */
5873 vpush_global_sym(&func_old_type
, TOK_memset
);
5875 #ifdef TCC_TARGET_ARM
5886 /* 't' contains the type and storage info. 'c' is the offset of the
5887 object in section 'sec'. If 'sec' is NULL, it means stack based
5888 allocation. 'first' is true if array '{' must be read (multi
5889 dimension implicit array init handling). 'size_only' is true if
5890 size only evaluation is wanted (only for arrays). */
5891 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5892 int first
, int size_only
)
5894 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5895 int size1
, align1
, expr_type
;
5899 if (type
->t
& VT_VLA
) {
5902 /* save current stack pointer */
5903 if (vlas_in_scope
== 0) {
5904 if (vla_sp_root_loc
== -1)
5905 vla_sp_root_loc
= (loc
-= PTR_SIZE
);
5906 gen_vla_sp_save(vla_sp_root_loc
);
5909 vla_runtime_type_size(type
, &a
);
5910 gen_vla_alloc(type
, a
);
5914 } else if (type
->t
& VT_ARRAY
) {
5918 t1
= pointed_type(type
);
5919 size1
= type_size(t1
, &align1
);
5922 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5925 tcc_error("character array initializer must be a literal,"
5926 " optionally enclosed in braces");
5931 /* only parse strings here if correct type (otherwise: handle
5932 them as ((w)char *) expressions */
5933 if ((tok
== TOK_LSTR
&&
5934 #ifdef TCC_TARGET_PE
5935 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5937 (t1
->t
& VT_BTYPE
) == VT_INT
5939 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5940 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5943 /* compute maximum number of chars wanted */
5945 cstr_len
= tokc
.str
.size
;
5947 cstr_len
= tokc
.str
.size
/ sizeof(nwchar_t
);
5950 if (n
>= 0 && nb
> (n
- array_length
))
5951 nb
= n
- array_length
;
5954 tcc_warning("initializer-string for array is too long");
5955 /* in order to go faster for common case (char
5956 string in global variable, we handle it
5958 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5959 memcpy(sec
->data
+ c
+ array_length
, tokc
.str
.data
, nb
);
5963 ch
= ((unsigned char *)tokc
.str
.data
)[i
];
5965 ch
= ((nwchar_t
*)tokc
.str
.data
)[i
];
5966 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5974 /* only add trailing zero if enough storage (no
5975 warning in this case since it is standard) */
5976 if (n
< 0 || array_length
< n
) {
5978 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5984 while (tok
!= '}') {
5985 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5986 if (n
>= 0 && index
>= n
)
5987 tcc_error("index too large");
5988 /* must put zero in holes (note that doing it that way
5989 ensures that it even works with designators) */
5990 if (!size_only
&& array_length
< index
) {
5991 init_putz(t1
, sec
, c
+ array_length
* size1
,
5992 (index
- array_length
) * size1
);
5995 if (index
> array_length
)
5996 array_length
= index
;
5997 /* special test for multi dimensional arrays (may not
5998 be strictly correct if designators are used at the
6000 if (index
>= n
&& no_oblock
)
6009 /* put zeros at the end */
6010 if (!size_only
&& n
>= 0 && array_length
< n
) {
6011 init_putz(t1
, sec
, c
+ array_length
* size1
,
6012 (n
- array_length
) * size1
);
6014 /* patch type size if needed */
6016 s
->c
= array_length
;
6017 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
6018 (sec
|| !first
|| tok
== '{')) {
6020 /* NOTE: the previous test is a specific case for automatic
6021 struct/union init */
6022 /* XXX: union needs only one init */
6029 if (tcc_state
->old_struct_init_code
) {
6030 /* an old version of struct initialization.
6031 It have a problems. But with a new version
6032 linux 2.4.26 can't load ramdisk.
6034 while (tok
== '(') {
6038 if (!parse_btype(&type1
, &ad1
))
6040 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6042 if (!is_assignable_types(type
, &type1
))
6043 tcc_error("invalid type for cast");
6050 if (!parse_btype(&type1
, &ad1
))
6052 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6054 if (!is_assignable_types(type
, &type1
))
6055 tcc_error("invalid type for cast");
6064 if (first
|| tok
== '{') {
6073 while (tok
!= '}') {
6074 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
6076 if (!size_only
&& array_length
< index
) {
6077 init_putz(type
, sec
, c
+ array_length
,
6078 index
- array_length
);
6080 index
= index
+ type_size(&f
->type
, &align1
);
6081 if (index
> array_length
)
6082 array_length
= index
;
6084 /* gr: skip fields from same union - ugly. */
6087 int f_size
= type_size(&f
->type
, &align
);
6088 int f_type
= (f
->type
.t
& VT_BTYPE
);
6090 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
6091 /* test for same offset */
6092 if (f
->next
->c
!= f
->c
)
6094 if ((f_type
== VT_STRUCT
) && (f_size
== 0)) {
6096 Lets assume a structure of size 0 can't be a member of the union.
6097 This allow to compile the following code from a linux kernel v2.4.26
6098 typedef struct { } rwlock_t;
6104 struct fs_struct init_fs = { { (1) }, (rwlock_t) {}, 0022, };
6105 tcc-0.9.23 can succesfully compile this version of the kernel.
6106 gcc don't have problems with this code too.
6110 /* if yes, test for bitfield shift */
6111 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
6112 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6113 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6114 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
6115 if (bit_pos_1
!= bit_pos_2
)
6122 if (no_oblock
&& f
== NULL
)
6128 /* put zeros at the end */
6129 if (!size_only
&& array_length
< n
) {
6130 init_putz(type
, sec
, c
+ array_length
,
6139 } else if (tok
== '{') {
6141 decl_initializer(type
, sec
, c
, first
, size_only
);
6143 } else if (size_only
) {
6144 /* just skip expression */
6145 parlevel
= parlevel1
= 0;
6146 while ((parlevel
> 0 || parlevel1
> 0 ||
6147 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
6150 else if (tok
== ')') {
6151 if (parlevel
== 0 && parlevel1
== 0)
6155 else if (tok
== '{')
6157 else if (tok
== '}') {
6158 if (parlevel
== 0 && parlevel1
== 0)
6165 /* currently, we always use constant expression for globals
6166 (may change for scripting case) */
6167 expr_type
= EXPR_CONST
;
6169 expr_type
= EXPR_ANY
;
6170 init_putv(type
, sec
, c
, 0, expr_type
);
6174 /* parse an initializer for type 't' if 'has_init' is non zero, and
6175 allocate space in local or global data space ('r' is either
6176 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
6177 variable 'v' of scope 'scope' is declared before initializers
6178 are parsed. If 'v' is zero, then a reference to the new object
6179 is put in the value stack. If 'has_init' is 2, a special parsing
6180 is done to handle string constants. */
6181 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
6182 int has_init
, int v
, int scope
)
6184 int size
, align
, addr
, data_offset
;
6186 ParseState saved_parse_state
= {0};
6187 TokenString
*init_str
= NULL
;
6189 Sym
*flexible_array
;
6191 flexible_array
= NULL
;
6192 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
6193 Sym
*field
= type
->ref
->next
;
6196 field
= field
->next
;
6197 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
6198 flexible_array
= field
;
6202 size
= type_size(type
, &align
);
6203 /* If unknown size, we must evaluate it before
6204 evaluating initializers because
6205 initializers can generate global data too
6206 (e.g. string pointers or ISOC99 compound
6207 literals). It also simplifies local
6208 initializers handling */
6209 if (size
< 0 || (flexible_array
&& has_init
)) {
6211 tcc_error("unknown type size");
6212 /* get all init string */
6213 init_str
= tok_str_alloc();
6214 if (has_init
== 2) {
6215 /* only get strings */
6216 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
6217 tok_str_add_tok(init_str
);
6222 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
6224 tcc_error("unexpected end of file in initializer");
6225 tok_str_add_tok(init_str
);
6228 else if (tok
== '}') {
6238 tok_str_add(init_str
, -1);
6239 tok_str_add(init_str
, 0);
6242 save_parse_state(&saved_parse_state
);
6244 begin_macro(init_str
, 1);
6246 decl_initializer(type
, NULL
, 0, 1, 1);
6247 /* prepare second initializer parsing */
6248 macro_ptr
= init_str
->str
;
6251 /* if still unknown size, error */
6252 size
= type_size(type
, &align
);
6254 tcc_error("unknown type size");
6256 /* If there's a flex member and it was used in the initializer
6258 if (flexible_array
&&
6259 flexible_array
->type
.ref
->c
> 0)
6260 size
+= flexible_array
->type
.ref
->c
6261 * pointed_size(&flexible_array
->type
);
6262 /* take into account specified alignment if bigger */
6263 if (ad
->a
.aligned
) {
6264 if (ad
->a
.aligned
> align
)
6265 align
= ad
->a
.aligned
;
6266 } else if (ad
->a
.packed
) {
6269 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
6271 #ifdef CONFIG_TCC_BCHECK
6272 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6276 loc
= (loc
- size
) & -align
;
6278 #ifdef CONFIG_TCC_BCHECK
6279 /* handles bounds */
6280 /* XXX: currently, since we do only one pass, we cannot track
6281 '&' operators, so we add only arrays */
6282 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6284 /* add padding between regions */
6286 /* then add local bound info */
6287 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(addr_t
));
6288 bounds_ptr
[0] = addr
;
6289 bounds_ptr
[1] = size
;
6293 /* local variable */
6294 sym_push(v
, type
, r
, addr
);
6296 /* push local reference */
6297 vset(type
, r
, addr
);
6303 if (v
&& scope
== VT_CONST
) {
6304 /* see if the symbol was already defined */
6307 if (!is_compatible_types(&sym
->type
, type
))
6308 tcc_error("incompatible types for redefinition of '%s'",
6309 get_tok_str(v
, NULL
));
6310 if (sym
->type
.t
& VT_EXTERN
) {
6311 /* if the variable is extern, it was not allocated */
6312 sym
->type
.t
&= ~VT_EXTERN
;
6313 /* set array size if it was omitted in extern
6315 if ((sym
->type
.t
& VT_ARRAY
) &&
6316 sym
->type
.ref
->c
< 0 &&
6318 sym
->type
.ref
->c
= type
->ref
->c
;
6320 /* we accept several definitions of the same
6321 global variable. this is tricky, because we
6322 must play with the SHN_COMMON type of the symbol */
6323 /* XXX: should check if the variable was already
6324 initialized. It is incorrect to initialized it
6326 /* no init data, we won't add more to the symbol */
6333 /* allocate symbol in corresponding section */
6338 else if (tcc_state
->nocommon
)
6342 data_offset
= sec
->data_offset
;
6343 data_offset
= (data_offset
+ align
- 1) & -align
;
6345 /* very important to increment global pointer at this time
6346 because initializers themselves can create new initializers */
6347 data_offset
+= size
;
6348 #ifdef CONFIG_TCC_BCHECK
6349 /* add padding if bound check */
6350 if (tcc_state
->do_bounds_check
)
6353 sec
->data_offset
= data_offset
;
6354 /* allocate section space to put the data */
6355 if (sec
->sh_type
!= SHT_NOBITS
&&
6356 data_offset
> sec
->data_allocated
)
6357 section_realloc(sec
, data_offset
);
6358 /* align section if needed */
6359 if (align
> sec
->sh_addralign
)
6360 sec
->sh_addralign
= align
;
6362 addr
= 0; /* avoid warning */
6366 if (scope
!= VT_CONST
|| !sym
) {
6367 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
6368 sym
->asm_label
= ad
->asm_label
;
6370 /* update symbol definition */
6372 put_extern_sym(sym
, sec
, addr
, size
);
6375 /* put a common area */
6376 put_extern_sym(sym
, NULL
, align
, size
);
6377 /* XXX: find a nicer way */
6378 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
6379 esym
->st_shndx
= SHN_COMMON
;
6382 /* push global reference */
6383 sym
= get_sym_ref(type
, sec
, addr
, size
);
6384 vpushsym(type
, sym
);
6386 /* patch symbol weakness */
6387 if (type
->t
& VT_WEAK
)
6389 apply_visibility(sym
, type
);
6390 #ifdef CONFIG_TCC_BCHECK
6391 /* handles bounds now because the symbol must be defined
6392 before for the relocation */
6393 if (tcc_state
->do_bounds_check
) {
6396 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
6397 /* then add global bound info */
6398 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(addr_t
));
6399 bounds_ptr
[0] = 0; /* relocated */
6400 bounds_ptr
[1] = size
;
6404 if (has_init
|| (type
->t
& VT_VLA
)) {
6405 decl_initializer(type
, sec
, addr
, 1, 0);
6406 /* patch flexible array member size back to -1, */
6407 /* for possible subsequent similar declarations */
6409 flexible_array
->type
.ref
->c
= -1;
6412 /* restore parse state if needed */
6415 restore_parse_state(&saved_parse_state
);
6419 static void put_func_debug(Sym
*sym
)
6424 /* XXX: we put here a dummy type */
6425 snprintf(buf
, sizeof(buf
), "%s:%c1",
6426 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
6427 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
6428 cur_text_section
, sym
->c
);
6429 /* //gr gdb wants a line at the function */
6430 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
6435 /* parse an old style function declaration list */
6436 /* XXX: check multiple parameter */
6437 static void func_decl_list(Sym
*func_sym
)
6444 /* parse each declaration */
6445 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
6446 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
6447 if (!parse_btype(&btype
, &ad
))
6448 expect("declaration list");
6449 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6450 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6452 /* we accept no variable after */
6456 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6457 /* find parameter in function parameter list */
6460 if ((s
->v
& ~SYM_FIELD
) == v
)
6464 tcc_error("declaration for parameter '%s' but no such parameter",
6465 get_tok_str(v
, NULL
));
6467 /* check that no storage specifier except 'register' was given */
6468 if (type
.t
& VT_STORAGE
)
6469 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
6470 convert_parameter_type(&type
);
6471 /* we can add the type (NOTE: it could be local to the function) */
6473 /* accept other parameters */
6484 /* parse a function defined by symbol 'sym' and generate its code in
6485 'cur_text_section' */
6486 static void gen_function(Sym
*sym
)
6488 int saved_nocode_wanted
= nocode_wanted
;
6491 ind
= cur_text_section
->data_offset
;
6492 /* NOTE: we patch the symbol size later */
6493 put_extern_sym(sym
, cur_text_section
, ind
, 0);
6494 funcname
= get_tok_str(sym
->v
, NULL
);
6496 /* Initialize VLA state */
6498 vla_sp_root_loc
= -1;
6499 /* put debug symbol */
6500 if (tcc_state
->do_debug
)
6501 put_func_debug(sym
);
6503 /* push a dummy symbol to enable local sym storage */
6504 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
6505 local_scope
= 1; /* for function parameters */
6506 gfunc_prolog(&sym
->type
);
6510 block(NULL
, NULL
, 0);
6513 cur_text_section
->data_offset
= ind
;
6514 label_pop(&global_label_stack
, NULL
);
6515 /* reset local stack */
6517 sym_pop(&local_stack
, NULL
);
6518 /* end of function */
6519 /* patch symbol size */
6520 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
6522 /* patch symbol weakness (this definition overrules any prototype) */
6523 if (sym
->type
.t
& VT_WEAK
)
6525 apply_visibility(sym
, &sym
->type
);
6526 if (tcc_state
->do_debug
) {
6527 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
6529 /* It's better to crash than to generate wrong code */
6530 cur_text_section
= NULL
;
6531 funcname
= ""; /* for safety */
6532 func_vt
.t
= VT_VOID
; /* for safety */
6533 func_var
= 0; /* for safety */
6534 ind
= 0; /* for safety */
6535 nocode_wanted
= saved_nocode_wanted
;
6539 static void gen_inline_functions(TCCState
*s
)
6542 int inline_generated
, i
, ln
;
6543 struct InlineFunc
*fn
;
6545 ln
= file
->line_num
;
6546 /* iterate while inline function are referenced */
6548 inline_generated
= 0;
6549 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6550 fn
= s
->inline_fns
[i
];
6552 if (sym
&& sym
->c
) {
6553 /* the function was used: generate its code and
6554 convert it to a normal function */
6557 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
6558 sym
->r
= VT_SYM
| VT_CONST
;
6559 sym
->type
.t
&= ~VT_INLINE
;
6561 begin_macro(fn
->func_str
, 1);
6563 cur_text_section
= text_section
;
6567 inline_generated
= 1;
6570 if (!inline_generated
)
6573 file
->line_num
= ln
;
6576 ST_FUNC
void free_inline_functions(TCCState
*s
)
6579 /* free tokens of unused inline functions */
6580 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6581 struct InlineFunc
*fn
= s
->inline_fns
[i
];
6583 tok_str_free(fn
->func_str
);
6585 dynarray_reset(&s
->inline_fns
, &s
->nb_inline_fns
);
6588 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
6589 static int decl0(int l
, int is_for_loop_init
)
6597 if (!parse_btype(&btype
, &ad
)) {
6598 if (is_for_loop_init
)
6600 /* skip redundant ';' */
6601 /* XXX: find more elegant solution */
6606 if (l
== VT_CONST
&&
6607 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6608 /* global asm block */
6612 /* special test for old K&R protos without explicit int
6613 type. Only accepted when defining global data */
6614 if (l
== VT_LOCAL
|| tok
< TOK_UIDENT
)
6618 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6619 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6621 if ((btype
.t
& VT_BTYPE
) == VT_STRUCT
) {
6622 int v
= btype
.ref
->v
;
6623 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) >= SYM_FIRST_ANOM
)
6624 tcc_warning("unnamed struct/union that defines no instances");
6629 while (1) { /* iterate thru each declaration */
6631 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6635 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
6636 printf("type = '%s'\n", buf
);
6639 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6640 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
6641 tcc_error("function without file scope cannot be static");
6643 /* if old style function prototype, we accept a
6646 if (sym
->c
== FUNC_OLD
)
6647 func_decl_list(sym
);
6650 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6651 ad
.asm_label
= asm_label_instr();
6652 /* parse one last attribute list, after asm label */
6653 parse_attribute(&ad
);
6660 #ifdef TCC_TARGET_PE
6661 if (ad
.a
.func_import
)
6662 type
.t
|= VT_IMPORT
;
6663 if (ad
.a
.func_export
)
6664 type
.t
|= VT_EXPORT
;
6666 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6670 tcc_error("cannot use local functions");
6671 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6672 expect("function definition");
6674 /* reject abstract declarators in function definition */
6676 while ((sym
= sym
->next
) != NULL
)
6677 if (!(sym
->v
& ~SYM_FIELD
))
6678 expect("identifier");
6680 /* XXX: cannot do better now: convert extern line to static inline */
6681 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6682 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6687 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6690 ref
= sym
->type
.ref
;
6691 if (0 == ref
->a
.func_proto
)
6692 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6694 /* use func_call from prototype if not defined */
6695 if (ref
->a
.func_call
!= FUNC_CDECL
6696 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6697 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6699 /* use export from prototype */
6700 if (ref
->a
.func_export
)
6701 type
.ref
->a
.func_export
= 1;
6703 /* use static from prototype */
6704 if (sym
->type
.t
& VT_STATIC
)
6705 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6707 /* If the definition has no visibility use the
6708 one from prototype. */
6709 if (! (type
.t
& VT_VIS_MASK
))
6710 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6712 if (!is_compatible_types(&sym
->type
, &type
)) {
6714 tcc_error("incompatible types for redefinition of '%s'",
6715 get_tok_str(v
, NULL
));
6717 type
.ref
->a
.func_proto
= 0;
6718 /* if symbol is already defined, then put complete type */
6721 /* put function symbol */
6722 sym
= global_identifier_push(v
, type
.t
, 0);
6723 sym
->type
.ref
= type
.ref
;
6726 /* static inline functions are just recorded as a kind
6727 of macro. Their code will be emitted at the end of
6728 the compilation unit only if they are used */
6729 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6730 (VT_INLINE
| VT_STATIC
)) {
6732 struct InlineFunc
*fn
;
6733 const char *filename
;
6735 filename
= file
? file
->filename
: "";
6736 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6737 strcpy(fn
->filename
, filename
);
6739 fn
->func_str
= tok_str_alloc();
6745 tcc_error("unexpected end of file");
6746 tok_str_add_tok(fn
->func_str
);
6751 } else if (t
== '}') {
6753 if (block_level
== 0)
6757 tok_str_add(fn
->func_str
, -1);
6758 tok_str_add(fn
->func_str
, 0);
6759 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6762 /* compute text section */
6763 cur_text_section
= ad
.section
;
6764 if (!cur_text_section
)
6765 cur_text_section
= text_section
;
6766 sym
->r
= VT_SYM
| VT_CONST
;
6771 if (btype
.t
& VT_TYPEDEF
) {
6772 /* save typedefed type */
6773 /* XXX: test storage specifiers ? */
6775 if (sym
&& sym
->scope
== local_scope
) {
6776 if (!is_compatible_types(&sym
->type
, &type
)
6777 || !(sym
->type
.t
& VT_TYPEDEF
))
6778 tcc_error("incompatible redefinition of '%s'",
6779 get_tok_str(v
, NULL
));
6782 sym
= sym_push(v
, &type
, 0, 0);
6785 sym
->type
.t
|= VT_TYPEDEF
;
6788 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6789 /* external function definition */
6790 /* specific case for func_call attribute */
6791 ad
.a
.func_proto
= 1;
6793 } else if (!(type
.t
& VT_ARRAY
)) {
6794 /* not lvalue if array */
6795 r
|= lvalue_type(type
.t
);
6797 has_init
= (tok
== '=');
6798 if (has_init
&& (type
.t
& VT_VLA
))
6799 tcc_error("Variable length array cannot be initialized");
6800 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6801 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6802 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6803 /* external variable or function */
6804 /* NOTE: as GCC, uninitialized global static
6805 arrays of null size are considered as
6807 sym
= external_sym(v
, &type
, r
);
6808 sym
->asm_label
= ad
.asm_label
;
6810 if (ad
.alias_target
) {
6815 alias_target
= sym_find(ad
.alias_target
);
6816 if (!alias_target
|| !alias_target
->c
)
6817 tcc_error("unsupported forward __alias__ attribute");
6818 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6819 tsec
.sh_num
= esym
->st_shndx
;
6820 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6823 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6824 if (type
.t
& VT_STATIC
)
6830 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, l
);
6834 if (is_for_loop_init
)
6847 ST_FUNC
void decl(int l
)
6852 /* ------------------------------------------------------------------------- */