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 Section
*text_section
, *data_section
, *bss_section
; /* predefined sections */
34 ST_DATA Section
*cur_text_section
; /* current section where function code is generated */
36 ST_DATA Section
*last_text_section
; /* to handle .previous asm directive */
38 #ifdef CONFIG_TCC_BCHECK
39 /* bound check related sections */
40 ST_DATA Section
*bounds_section
; /* contains global data bound description */
41 ST_DATA Section
*lbounds_section
; /* contains local data bound description */
44 ST_DATA Section
*symtab_section
, *strtab_section
;
46 ST_DATA Section
*stab_section
, *stabstr_section
;
47 ST_DATA Sym
*sym_free_first
;
48 ST_DATA
void **sym_pools
;
49 ST_DATA
int nb_sym_pools
;
51 ST_DATA Sym
*global_stack
;
52 ST_DATA Sym
*local_stack
;
53 ST_DATA Sym
*scope_stack_bottom
;
54 ST_DATA Sym
*define_stack
;
55 ST_DATA Sym
*global_label_stack
;
56 ST_DATA Sym
*local_label_stack
;
58 ST_DATA
int vla_sp_loc_tmp
; /* vla_sp_loc is set to this when the value won't be needed later */
59 ST_DATA
int vla_sp_root_loc
; /* vla_sp_loc for SP before any VLAs were pushed */
60 ST_DATA
int *vla_sp_loc
; /* Pointer to variable holding location to store stack pointer on the stack when modifying stack pointer */
61 ST_DATA
int vla_flags
; /* VLA_* flags */
63 ST_DATA SValue __vstack
[1+VSTACK_SIZE
], *vtop
;
65 ST_DATA
int const_wanted
; /* true if constant wanted */
66 ST_DATA
int nocode_wanted
; /* true if no code generation wanted for an expression */
67 ST_DATA
int global_expr
; /* true if compound literals must be allocated globally (used during initializers parsing */
68 ST_DATA CType func_vt
; /* current function return type (used by return instruction) */
69 ST_DATA
int func_var
; /* true if current function is variadic (used by return instruction) */
71 ST_DATA
int last_line_num
, last_ind
, func_ind
; /* debug last line number and pc */
72 ST_DATA
char *funcname
;
74 ST_DATA CType char_pointer_type
, func_old_type
, int_type
, size_type
;
76 /* ------------------------------------------------------------------------- */
77 static void gen_cast(CType
*type
);
78 static inline CType
*pointed_type(CType
*type
);
79 static int is_compatible_types(CType
*type1
, CType
*type2
);
80 static int parse_btype(CType
*type
, AttributeDef
*ad
);
81 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
82 static void parse_expr_type(CType
*type
);
83 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
84 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
, int case_reg
, int is_expr
);
85 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, char *asm_label
, int scope
);
86 static int decl0(int l
, int is_for_loop_init
);
87 static void expr_eq(void);
88 static void unary_type(CType
*type
);
89 static void vla_runtime_type_size(CType
*type
, int *a
);
90 static void vla_sp_save(void);
91 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
92 static void expr_type(CType
*type
);
96 ST_FUNC
void vpush64(int ty
, unsigned long long v
);
97 ST_FUNC
void vpush(CType
*type
);
98 ST_FUNC
int gvtst(int inv
, int t
);
99 ST_FUNC
int is_btype_size(int bt
);
101 ST_INLN
int is_float(int t
)
105 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
|| bt
== VT_QFLOAT
;
108 /* we use our own 'finite' function to avoid potential problems with
109 non standard math libs */
110 /* XXX: endianness dependent */
111 ST_FUNC
int ieee_finite(double d
)
114 memcpy(p
, &d
, sizeof(double));
115 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
118 ST_FUNC
void test_lvalue(void)
120 if (!(vtop
->r
& VT_LVAL
))
124 /* ------------------------------------------------------------------------- */
125 /* symbol allocator */
126 static Sym
*__sym_malloc(void)
128 Sym
*sym_pool
, *sym
, *last_sym
;
131 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
132 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
134 last_sym
= sym_free_first
;
136 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
137 sym
->next
= last_sym
;
141 sym_free_first
= last_sym
;
145 static inline Sym
*sym_malloc(void)
148 sym
= sym_free_first
;
150 sym
= __sym_malloc();
151 sym_free_first
= sym
->next
;
155 ST_INLN
void sym_free(Sym
*sym
)
157 sym
->next
= sym_free_first
;
158 tcc_free(sym
->asm_label
);
159 sym_free_first
= sym
;
162 /* push, without hashing */
163 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
166 if (ps
== &local_stack
) {
167 for (s
= *ps
; s
&& s
!= scope_stack_bottom
; s
= s
->prev
)
168 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
&& s
->v
== v
)
169 tcc_error("incompatible types for redefinition of '%s'",
170 get_tok_str(v
, NULL
));
188 /* find a symbol and return its associated structure. 's' is the top
189 of the symbol stack */
190 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
202 /* structure lookup */
203 ST_INLN Sym
*struct_find(int v
)
206 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
208 return table_ident
[v
]->sym_struct
;
211 /* find an identifier */
212 ST_INLN Sym
*sym_find(int v
)
215 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
217 return table_ident
[v
]->sym_identifier
;
220 /* push a given symbol on the symbol stack */
221 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
230 s
= sym_push2(ps
, v
, type
->t
, c
);
231 s
->type
.ref
= type
->ref
;
233 /* don't record fields or anonymous symbols */
235 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
236 /* record symbol in token array */
237 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
239 ps
= &ts
->sym_struct
;
241 ps
= &ts
->sym_identifier
;
248 /* push a global identifier */
249 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
252 s
= sym_push2(&global_stack
, v
, t
, c
);
253 /* don't record anonymous symbol */
254 if (v
< SYM_FIRST_ANOM
) {
255 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
256 /* modify the top most local identifier, so that
257 sym_identifier will point to 's' when popped */
259 ps
= &(*ps
)->prev_tok
;
266 /* pop symbols until top reaches 'b' */
267 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
277 /* remove symbol in token array */
279 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
280 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
282 ps
= &ts
->sym_struct
;
284 ps
= &ts
->sym_identifier
;
293 static void weaken_symbol(Sym
*sym
)
295 sym
->type
.t
|= VT_WEAK
;
300 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
301 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
302 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
306 static void apply_visibility(Sym
*sym
, CType
*type
)
308 int vis
= sym
->type
.t
& VT_VIS_MASK
;
309 int vis2
= type
->t
& VT_VIS_MASK
;
310 if (vis
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
312 else if (vis2
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
315 vis
= (vis
< vis2
) ? vis
: vis2
;
316 sym
->type
.t
&= ~VT_VIS_MASK
;
322 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
323 vis
>>= VT_VIS_SHIFT
;
324 esym
->st_other
= (esym
->st_other
& ~ELFW(ST_VISIBILITY
)(-1)) | vis
;
328 /* ------------------------------------------------------------------------- */
330 ST_FUNC
void swap(int *p
, int *q
)
338 static void vsetc(CType
*type
, int r
, CValue
*vc
)
342 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
343 tcc_error("memory full (vstack)");
344 /* cannot let cpu flags if other instruction are generated. Also
345 avoid leaving VT_JMP anywhere except on the top of the stack
346 because it would complicate the code generator. */
347 if (vtop
>= vstack
) {
348 v
= vtop
->r
& VT_VALMASK
;
349 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
359 /* push constant of type "type" with useless value */
360 ST_FUNC
void vpush(CType
*type
)
363 vsetc(type
, VT_CONST
, &cval
);
366 /* push integer constant */
367 ST_FUNC
void vpushi(int v
)
371 vsetc(&int_type
, VT_CONST
, &cval
);
374 /* push a pointer sized constant */
375 static void vpushs(addr_t v
)
379 vsetc(&size_type
, VT_CONST
, &cval
);
382 /* push arbitrary 64bit constant */
383 ST_FUNC
void vpush64(int ty
, unsigned long long v
)
390 vsetc(&ctype
, VT_CONST
, &cval
);
393 /* push long long constant */
394 static inline void vpushll(long long v
)
396 vpush64(VT_LLONG
, v
);
399 /* push a symbol value of TYPE */
400 static inline void vpushsym(CType
*type
, Sym
*sym
)
404 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
408 /* Return a static symbol pointing to a section */
409 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
415 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
416 sym
->type
.ref
= type
->ref
;
417 sym
->r
= VT_CONST
| VT_SYM
;
418 put_extern_sym(sym
, sec
, offset
, size
);
422 /* push a reference to a section offset by adding a dummy symbol */
423 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
425 vpushsym(type
, get_sym_ref(type
, sec
, offset
, size
));
428 /* define a new external reference to a symbol 'v' of type 'u' */
429 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
435 /* push forward reference */
436 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
437 s
->type
.ref
= type
->ref
;
438 s
->r
= r
| VT_CONST
| VT_SYM
;
443 /* define a new external reference to a symbol 'v' with alternate asm
444 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
445 is no alternate name (most cases) */
446 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
452 /* push forward reference */
453 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
454 s
->asm_label
= asm_label
;
455 s
->type
.t
|= VT_EXTERN
;
456 } else if (s
->type
.ref
== func_old_type
.ref
) {
457 s
->type
.ref
= type
->ref
;
458 s
->r
= r
| VT_CONST
| VT_SYM
;
459 s
->type
.t
|= VT_EXTERN
;
460 } else if (!is_compatible_types(&s
->type
, type
)) {
461 tcc_error("incompatible types for redefinition of '%s'",
462 get_tok_str(v
, NULL
));
464 /* Merge some storage attributes. */
465 if (type
->t
& VT_WEAK
)
468 if (type
->t
& VT_VIS_MASK
)
469 apply_visibility(s
, type
);
474 /* push a reference to global symbol v */
475 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
477 vpushsym(type
, external_global_sym(v
, type
, 0));
480 ST_FUNC
void vset(CType
*type
, int r
, int v
)
485 vsetc(type
, r
, &cval
);
488 static void vseti(int r
, int v
)
496 ST_FUNC
void vswap(void)
499 /* cannot let cpu flags if other instruction are generated. Also
500 avoid leaving VT_JMP anywhere except on the top of the stack
501 because it would complicate the code generator. */
502 if (vtop
>= vstack
) {
503 int v
= vtop
->r
& VT_VALMASK
;
504 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
511 /* XXX: +2% overall speed possible with optimized memswap
513 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
517 ST_FUNC
void vpushv(SValue
*v
)
519 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
520 tcc_error("memory full (vstack)");
525 static void vdup(void)
530 /* save r to the memory stack, and mark it as being free */
531 ST_FUNC
void save_reg(int r
)
533 int l
, saved
, size
, align
;
537 /* modify all stack values */
540 for(p
=vstack
;p
<=vtop
;p
++) {
541 if ((p
->r
& VT_VALMASK
) == r
||
542 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
543 /* must save value on stack if not already done */
545 /* NOTE: must reload 'r' because r might be equal to r2 */
546 r
= p
->r
& VT_VALMASK
;
547 /* store register in the stack */
549 if ((p
->r
& VT_LVAL
) ||
550 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
551 #ifdef TCC_TARGET_X86_64
552 type
= &char_pointer_type
;
556 size
= type_size(type
, &align
);
557 loc
= (loc
- size
) & -align
;
559 sv
.r
= VT_LOCAL
| VT_LVAL
;
562 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
563 /* x86 specific: need to pop fp register ST0 if saved */
565 o(0xd8dd); /* fstp %st(0) */
568 #ifndef TCC_TARGET_X86_64
569 /* special long long case */
570 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
578 /* mark that stack entry as being saved on the stack */
579 if (p
->r
& VT_LVAL
) {
580 /* also clear the bounded flag because the
581 relocation address of the function was stored in
583 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
585 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
593 #ifdef TCC_TARGET_ARM
594 /* find a register of class 'rc2' with at most one reference on stack.
595 * If none, call get_reg(rc) */
596 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
601 for(r
=0;r
<NB_REGS
;r
++) {
602 if (reg_classes
[r
] & rc2
) {
605 for(p
= vstack
; p
<= vtop
; p
++) {
606 if ((p
->r
& VT_VALMASK
) == r
||
607 (p
->r2
& VT_VALMASK
) == r
)
618 /* find a free register of class 'rc'. If none, save one register */
619 ST_FUNC
int get_reg(int rc
)
624 /* find a free register */
625 for(r
=0;r
<NB_REGS
;r
++) {
626 if (reg_classes
[r
] & rc
) {
627 for(p
=vstack
;p
<=vtop
;p
++) {
628 if ((p
->r
& VT_VALMASK
) == r
||
629 (p
->r2
& VT_VALMASK
) == r
)
637 /* no register left : free the first one on the stack (VERY
638 IMPORTANT to start from the bottom to ensure that we don't
639 spill registers used in gen_opi()) */
640 for(p
=vstack
;p
<=vtop
;p
++) {
641 /* look at second register (if long long) */
642 r
= p
->r2
& VT_VALMASK
;
643 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
645 r
= p
->r
& VT_VALMASK
;
646 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
652 /* Should never comes here */
656 /* save registers up to (vtop - n) stack entry */
657 ST_FUNC
void save_regs(int n
)
662 for(p
= vstack
;p
<= p1
; p
++) {
663 r
= p
->r
& VT_VALMASK
;
670 /* move register 's' (of type 't') to 'r', and flush previous value of r to memory
672 static void move_reg(int r
, int s
, int t
)
686 /* get address of vtop (vtop MUST BE an lvalue) */
687 static void gaddrof(void)
689 if (vtop
->r
& VT_REF
)
692 /* tricky: if saved lvalue, then we can go back to lvalue */
693 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
694 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
699 #ifdef CONFIG_TCC_BCHECK
700 /* generate lvalue bound code */
701 static void gbound(void)
706 vtop
->r
&= ~VT_MUSTBOUND
;
707 /* if lvalue, then use checking code before dereferencing */
708 if (vtop
->r
& VT_LVAL
) {
709 /* if not VT_BOUNDED value, then make one */
710 if (!(vtop
->r
& VT_BOUNDED
)) {
711 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
712 /* must save type because we must set it to int to get pointer */
714 vtop
->type
.t
= VT_INT
;
717 gen_bounded_ptr_add();
718 vtop
->r
|= lval_type
;
721 /* then check for dereferencing */
722 gen_bounded_ptr_deref();
727 /* store vtop a register belonging to class 'rc'. lvalues are
728 converted to values. Cannot be used if cannot be converted to
729 register value (such as structures). */
730 ST_FUNC
int gv(int rc
)
732 int r
, bit_pos
, bit_size
, size
, align
, i
;
735 /* NOTE: get_reg can modify vstack[] */
736 if (vtop
->type
.t
& VT_BITFIELD
) {
739 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
740 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
741 /* remove bit field info to avoid loops */
742 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
743 /* cast to int to propagate signedness in following ops */
744 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
749 if((vtop
->type
.t
& VT_UNSIGNED
) ||
750 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
751 type
.t
|= VT_UNSIGNED
;
753 /* generate shifts */
754 vpushi(bits
- (bit_pos
+ bit_size
));
756 vpushi(bits
- bit_size
);
757 /* NOTE: transformed to SHR if unsigned */
761 if (is_float(vtop
->type
.t
) &&
762 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
765 unsigned long offset
;
766 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
770 /* XXX: unify with initializers handling ? */
771 /* CPUs usually cannot use float constants, so we store them
772 generically in data segment */
773 size
= type_size(&vtop
->type
, &align
);
774 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
775 data_section
->data_offset
= offset
;
776 /* XXX: not portable yet */
777 #if defined(__i386__) || defined(__x86_64__)
778 /* Zero pad x87 tenbyte long doubles */
779 if (size
== LDOUBLE_SIZE
) {
780 vtop
->c
.tab
[2] &= 0xffff;
781 #if LDOUBLE_SIZE == 16
786 ptr
= section_ptr_add(data_section
, size
);
788 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
792 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
796 ptr
[i
] = vtop
->c
.tab
[i
];
797 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
798 vtop
->r
|= VT_LVAL
| VT_SYM
;
800 vtop
->c
.ptr_offset
= 0;
802 #ifdef CONFIG_TCC_BCHECK
803 if (vtop
->r
& VT_MUSTBOUND
)
807 r
= vtop
->r
& VT_VALMASK
;
808 rc2
= (rc
& RC_FLOAT
) ? RC_FLOAT
: RC_INT
;
811 #ifdef TCC_TARGET_X86_64
812 else if (rc
== RC_FRET
)
816 /* need to reload if:
818 - lvalue (need to dereference pointer)
819 - already a register, but not in the right class */
821 || (vtop
->r
& VT_LVAL
)
822 || !(reg_classes
[r
] & rc
)
823 #ifdef TCC_TARGET_X86_64
824 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
825 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
&& !(reg_classes
[vtop
->r2
] & rc2
))
827 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
832 #ifdef TCC_TARGET_X86_64
833 if (((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
)) {
834 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
836 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
837 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
838 unsigned long long ll
;
840 int r2
, original_type
;
841 original_type
= vtop
->type
.t
;
842 /* two register type load : expand to two words
844 #ifndef TCC_TARGET_X86_64
845 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
848 vtop
->c
.ui
= ll
; /* first word */
850 vtop
->r
= r
; /* save register value */
851 vpushi(ll
>> 32); /* second word */
854 if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
855 (vtop
->r
& VT_LVAL
)) {
856 /* We do not want to modifier the long long
857 pointer here, so the safest (and less
858 efficient) is to save all the other registers
859 in the stack. XXX: totally inefficient. */
861 /* load from memory */
862 vtop
->type
.t
= load_type
;
865 vtop
[-1].r
= r
; /* save register value */
866 /* increment pointer to get second word */
867 vtop
->type
.t
= addr_type
;
872 vtop
->type
.t
= load_type
;
877 vtop
[-1].r
= r
; /* save register value */
878 vtop
->r
= vtop
[-1].r2
;
880 /* Allocate second register. Here we rely on the fact that
881 get_reg() tries first to free r2 of an SValue. */
885 /* write second register */
887 vtop
->type
.t
= original_type
;
888 } else if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
890 /* lvalue of scalar type : need to use lvalue type
891 because of possible cast */
894 /* compute memory access type */
895 if (vtop
->r
& VT_REF
)
896 #ifdef TCC_TARGET_X86_64
901 else if (vtop
->r
& VT_LVAL_BYTE
)
903 else if (vtop
->r
& VT_LVAL_SHORT
)
905 if (vtop
->r
& VT_LVAL_UNSIGNED
)
909 /* restore wanted type */
912 /* one register type load */
917 #ifdef TCC_TARGET_C67
918 /* uses register pairs for doubles */
919 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
926 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
927 ST_FUNC
void gv2(int rc1
, int rc2
)
931 /* generate more generic register first. But VT_JMP or VT_CMP
932 values must be generated first in all cases to avoid possible
934 v
= vtop
[0].r
& VT_VALMASK
;
935 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
940 /* test if reload is needed for first register */
941 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
951 /* test if reload is needed for first register */
952 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
958 /* wrapper around RC_FRET to return a register by type */
959 static int rc_fret(int t
)
961 #ifdef TCC_TARGET_X86_64
962 if (t
== VT_LDOUBLE
) {
969 /* wrapper around REG_FRET to return a register by type */
970 static int reg_fret(int t
)
972 #ifdef TCC_TARGET_X86_64
973 if (t
== VT_LDOUBLE
) {
980 /* expand long long on stack in two int registers */
981 static void lexpand(void)
985 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
988 vtop
[0].r
= vtop
[-1].r2
;
989 vtop
[0].r2
= VT_CONST
;
990 vtop
[-1].r2
= VT_CONST
;
991 vtop
[0].type
.t
= VT_INT
| u
;
992 vtop
[-1].type
.t
= VT_INT
| u
;
995 #ifdef TCC_TARGET_ARM
996 /* expand long long on stack */
997 ST_FUNC
void lexpand_nr(void)
1001 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1003 vtop
->r2
= VT_CONST
;
1004 vtop
->type
.t
= VT_INT
| u
;
1005 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
1006 if (v
== VT_CONST
) {
1007 vtop
[-1].c
.ui
= vtop
->c
.ull
;
1008 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
1010 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1012 vtop
->r
= vtop
[-1].r
;
1013 } else if (v
> VT_CONST
) {
1017 vtop
->r
= vtop
[-1].r2
;
1018 vtop
[-1].r2
= VT_CONST
;
1019 vtop
[-1].type
.t
= VT_INT
| u
;
1023 #ifndef TCC_TARGET_X86_64
1024 /* build a long long from two ints */
1025 static void lbuild(int t
)
1027 gv2(RC_INT
, RC_INT
);
1028 vtop
[-1].r2
= vtop
[0].r
;
1029 vtop
[-1].type
.t
= t
;
1034 /* rotate n first stack elements to the bottom
1035 I1 ... In -> I2 ... In I1 [top is right]
1037 ST_FUNC
void vrotb(int n
)
1043 for(i
=-n
+1;i
!=0;i
++)
1044 vtop
[i
] = vtop
[i
+1];
1048 /* rotate the n elements before entry e towards the top
1049 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1051 ST_FUNC
void vrote(SValue
*e
, int n
)
1057 for(i
= 0;i
< n
- 1; i
++)
1062 /* rotate n first stack elements to the top
1063 I1 ... In -> In I1 ... I(n-1) [top is right]
1065 ST_FUNC
void vrott(int n
)
1070 /* pop stack value */
1071 ST_FUNC
void vpop(void)
1074 v
= vtop
->r
& VT_VALMASK
;
1075 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1076 /* for x86, we need to pop the FP stack */
1077 if (v
== TREG_ST0
&& !nocode_wanted
) {
1078 o(0xd8dd); /* fstp %st(0) */
1081 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1082 /* need to put correct jump if && or || without test */
1088 /* convert stack entry to register and duplicate its value in another
1090 static void gv_dup(void)
1095 #ifndef TCC_TARGET_X86_64
1096 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1103 /* stack: H L L1 H1 */
1112 /* duplicate value */
1115 #ifdef TCC_TARGET_X86_64
1116 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1127 load(r1
, &sv
); /* move r to r1 */
1129 /* duplicates value */
1135 /* Generate value test
1137 * Generate a test for any value (jump, comparison and integers) */
1138 ST_FUNC
int gvtst(int inv
, int t
)
1140 int v
= vtop
->r
& VT_VALMASK
;
1141 if (v
!= VT_CMP
&& v
!= VT_JMP
&& v
!= VT_JMPI
) {
1145 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1146 /* constant jmp optimization */
1147 if ((vtop
->c
.i
!= 0) != inv
)
1152 return gtst(inv
, t
);
1155 #ifndef TCC_TARGET_X86_64
1156 /* generate CPU independent (unsigned) long long operations */
1157 static void gen_opl(int op
)
1159 int t
, a
, b
, op1
, c
, i
;
1161 unsigned short reg_iret
= REG_IRET
;
1162 unsigned short reg_lret
= REG_LRET
;
1168 func
= TOK___divdi3
;
1171 func
= TOK___udivdi3
;
1174 func
= TOK___moddi3
;
1177 func
= TOK___umoddi3
;
1184 /* call generic long long function */
1185 vpush_global_sym(&func_old_type
, func
);
1190 vtop
->r2
= reg_lret
;
1203 /* stack: L1 H1 L2 H2 */
1208 vtop
[-2] = vtop
[-3];
1211 /* stack: H1 H2 L1 L2 */
1217 /* stack: H1 H2 L1 L2 ML MH */
1220 /* stack: ML MH H1 H2 L1 L2 */
1224 /* stack: ML MH H1 L2 H2 L1 */
1229 /* stack: ML MH M1 M2 */
1232 } else if (op
== '+' || op
== '-') {
1233 /* XXX: add non carry method too (for MIPS or alpha) */
1239 /* stack: H1 H2 (L1 op L2) */
1242 gen_op(op1
+ 1); /* TOK_xxxC2 */
1245 /* stack: H1 H2 (L1 op L2) */
1248 /* stack: (L1 op L2) H1 H2 */
1250 /* stack: (L1 op L2) (H1 op H2) */
1258 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1259 t
= vtop
[-1].type
.t
;
1263 /* stack: L H shift */
1265 /* constant: simpler */
1266 /* NOTE: all comments are for SHL. the other cases are
1267 done by swaping words */
1278 if (op
!= TOK_SAR
) {
1311 /* XXX: should provide a faster fallback on x86 ? */
1314 func
= TOK___ashrdi3
;
1317 func
= TOK___lshrdi3
;
1320 func
= TOK___ashldi3
;
1326 /* compare operations */
1332 /* stack: L1 H1 L2 H2 */
1334 vtop
[-1] = vtop
[-2];
1336 /* stack: L1 L2 H1 H2 */
1339 /* when values are equal, we need to compare low words. since
1340 the jump is inverted, we invert the test too. */
1343 else if (op1
== TOK_GT
)
1345 else if (op1
== TOK_ULT
)
1347 else if (op1
== TOK_UGT
)
1352 if (op1
!= TOK_NE
) {
1356 /* generate non equal test */
1357 /* XXX: NOT PORTABLE yet */
1361 #if defined(TCC_TARGET_I386)
1362 b
= psym(0x850f, 0);
1363 #elif defined(TCC_TARGET_ARM)
1365 o(0x1A000000 | encbranch(ind
, 0, 1));
1366 #elif defined(TCC_TARGET_C67)
1367 tcc_error("not implemented");
1369 #error not supported
1373 /* compare low. Always unsigned */
1377 else if (op1
== TOK_LE
)
1379 else if (op1
== TOK_GT
)
1381 else if (op1
== TOK_GE
)
1392 /* handle integer constant optimizations and various machine
1394 static void gen_opic(int op
)
1396 int c1
, c2
, t1
, t2
, n
;
1399 typedef unsigned long long U
;
1403 t1
= v1
->type
.t
& VT_BTYPE
;
1404 t2
= v2
->type
.t
& VT_BTYPE
;
1408 else if (v1
->type
.t
& VT_UNSIGNED
)
1415 else if (v2
->type
.t
& VT_UNSIGNED
)
1420 /* currently, we cannot do computations with forward symbols */
1421 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1422 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1425 case '+': l1
+= l2
; break;
1426 case '-': l1
-= l2
; break;
1427 case '&': l1
&= l2
; break;
1428 case '^': l1
^= l2
; break;
1429 case '|': l1
|= l2
; break;
1430 case '*': l1
*= l2
; break;
1437 /* if division by zero, generate explicit division */
1440 tcc_error("division by zero in constant");
1444 default: l1
/= l2
; break;
1445 case '%': l1
%= l2
; break;
1446 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1447 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1450 case TOK_SHL
: l1
<<= l2
; break;
1451 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1452 case TOK_SAR
: l1
>>= l2
; break;
1454 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1455 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1456 case TOK_EQ
: l1
= l1
== l2
; break;
1457 case TOK_NE
: l1
= l1
!= l2
; break;
1458 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1459 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1460 case TOK_LT
: l1
= l1
< l2
; break;
1461 case TOK_GE
: l1
= l1
>= l2
; break;
1462 case TOK_LE
: l1
= l1
<= l2
; break;
1463 case TOK_GT
: l1
= l1
> l2
; break;
1465 case TOK_LAND
: l1
= l1
&& l2
; break;
1466 case TOK_LOR
: l1
= l1
|| l2
; break;
1473 /* if commutative ops, put c2 as constant */
1474 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1475 op
== '|' || op
== '*')) {
1477 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1478 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1480 /* Filter out NOP operations like x*1, x-0, x&-1... */
1481 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1484 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1485 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1491 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1492 /* try to use shifts instead of muls or divs */
1493 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1502 else if (op
== TOK_PDIV
)
1508 } else if (c2
&& (op
== '+' || op
== '-') &&
1509 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1510 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1511 /* symbol + constant case */
1518 if (!nocode_wanted
) {
1519 /* call low level op generator */
1520 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1531 /* generate a floating point operation with constant propagation */
1532 static void gen_opif(int op
)
1540 /* currently, we cannot do computations with forward symbols */
1541 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1542 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1544 if (v1
->type
.t
== VT_FLOAT
) {
1547 } else if (v1
->type
.t
== VT_DOUBLE
) {
1555 /* NOTE: we only do constant propagation if finite number (not
1556 NaN or infinity) (ANSI spec) */
1557 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1561 case '+': f1
+= f2
; break;
1562 case '-': f1
-= f2
; break;
1563 case '*': f1
*= f2
; break;
1567 tcc_error("division by zero in constant");
1572 /* XXX: also handles tests ? */
1576 /* XXX: overflow test ? */
1577 if (v1
->type
.t
== VT_FLOAT
) {
1579 } else if (v1
->type
.t
== VT_DOUBLE
) {
1587 if (!nocode_wanted
) {
1595 static int pointed_size(CType
*type
)
1598 return type_size(pointed_type(type
), &align
);
1601 static void vla_runtime_pointed_size(CType
*type
)
1604 vla_runtime_type_size(pointed_type(type
), &align
);
1607 static inline int is_null_pointer(SValue
*p
)
1609 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1611 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1612 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0) ||
1613 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&& p
->c
.ptr_offset
== 0);
1616 static inline int is_integer_btype(int bt
)
1618 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1619 bt
== VT_INT
|| bt
== VT_LLONG
);
1622 /* check types for comparison or subtraction of pointers */
1623 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1625 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1628 /* null pointers are accepted for all comparisons as gcc */
1629 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1633 bt1
= type1
->t
& VT_BTYPE
;
1634 bt2
= type2
->t
& VT_BTYPE
;
1635 /* accept comparison between pointer and integer with a warning */
1636 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1637 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1638 tcc_warning("comparison between pointer and integer");
1642 /* both must be pointers or implicit function pointers */
1643 if (bt1
== VT_PTR
) {
1644 type1
= pointed_type(type1
);
1645 } else if (bt1
!= VT_FUNC
)
1646 goto invalid_operands
;
1648 if (bt2
== VT_PTR
) {
1649 type2
= pointed_type(type2
);
1650 } else if (bt2
!= VT_FUNC
) {
1652 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1654 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1655 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1659 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1660 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1661 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1662 /* gcc-like error if '-' is used */
1664 goto invalid_operands
;
1666 tcc_warning("comparison of distinct pointer types lacks a cast");
1670 /* generic gen_op: handles types problems */
1671 ST_FUNC
void gen_op(int op
)
1673 int u
, t1
, t2
, bt1
, bt2
, t
;
1676 t1
= vtop
[-1].type
.t
;
1677 t2
= vtop
[0].type
.t
;
1678 bt1
= t1
& VT_BTYPE
;
1679 bt2
= t2
& VT_BTYPE
;
1681 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1682 /* at least one operand is a pointer */
1683 /* relationnal op: must be both pointers */
1684 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1685 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1686 /* pointers are handled are unsigned */
1687 #ifdef TCC_TARGET_X86_64
1688 t
= VT_LLONG
| VT_UNSIGNED
;
1690 t
= VT_INT
| VT_UNSIGNED
;
1694 /* if both pointers, then it must be the '-' op */
1695 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1697 tcc_error("cannot use pointers here");
1698 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1699 /* XXX: check that types are compatible */
1700 if (vtop
[-1].type
.t
& VT_VLA
) {
1701 vla_runtime_pointed_size(&vtop
[-1].type
);
1703 vpushi(pointed_size(&vtop
[-1].type
));
1707 /* set to integer type */
1708 #ifdef TCC_TARGET_X86_64
1709 vtop
->type
.t
= VT_LLONG
;
1711 vtop
->type
.t
= VT_INT
;
1716 /* exactly one pointer : must be '+' or '-'. */
1717 if (op
!= '-' && op
!= '+')
1718 tcc_error("cannot use pointers here");
1719 /* Put pointer as first operand */
1720 if (bt2
== VT_PTR
) {
1724 type1
= vtop
[-1].type
;
1725 type1
.t
&= ~VT_ARRAY
;
1726 if (vtop
[-1].type
.t
& VT_VLA
)
1727 vla_runtime_pointed_size(&vtop
[-1].type
);
1729 u
= pointed_size(&vtop
[-1].type
);
1731 tcc_error("unknown array element size");
1732 #ifdef TCC_TARGET_X86_64
1735 /* XXX: cast to int ? (long long case) */
1740 #ifdef CONFIG_TCC_BCHECK
1741 /* if evaluating constant expression, no code should be
1742 generated, so no bound check */
1743 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1744 /* if bounded pointers, we generate a special code to
1751 gen_bounded_ptr_add();
1757 /* put again type if gen_opic() swaped operands */
1760 } else if (is_float(bt1
) || is_float(bt2
)) {
1761 /* compute bigger type and do implicit casts */
1762 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1764 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1769 /* floats can only be used for a few operations */
1770 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1771 (op
< TOK_ULT
|| op
> TOK_GT
))
1772 tcc_error("invalid operands for binary operation");
1774 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
1775 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
1776 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
1779 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1780 /* cast to biggest op */
1782 /* convert to unsigned if it does not fit in a long long */
1783 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1784 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1787 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1788 tcc_error("comparison of struct");
1790 /* integer operations */
1792 /* convert to unsigned if it does not fit in an integer */
1793 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1794 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1797 /* XXX: currently, some unsigned operations are explicit, so
1798 we modify them here */
1799 if (t
& VT_UNSIGNED
) {
1806 else if (op
== TOK_LT
)
1808 else if (op
== TOK_GT
)
1810 else if (op
== TOK_LE
)
1812 else if (op
== TOK_GE
)
1819 /* special case for shifts and long long: we keep the shift as
1821 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1828 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1829 /* relationnal op: the result is an int */
1830 vtop
->type
.t
= VT_INT
;
1837 #ifndef TCC_TARGET_ARM
1838 /* generic itof for unsigned long long case */
1839 static void gen_cvt_itof1(int t
)
1841 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1842 (VT_LLONG
| VT_UNSIGNED
)) {
1845 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1846 #if LDOUBLE_SIZE != 8
1847 else if (t
== VT_LDOUBLE
)
1848 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1851 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1855 vtop
->r
= reg_fret(t
);
1862 /* generic ftoi for unsigned long long case */
1863 static void gen_cvt_ftoi1(int t
)
1867 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1868 /* not handled natively */
1869 st
= vtop
->type
.t
& VT_BTYPE
;
1871 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1872 #if LDOUBLE_SIZE != 8
1873 else if (st
== VT_LDOUBLE
)
1874 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1877 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1882 vtop
->r2
= REG_LRET
;
1888 /* force char or short cast */
1889 static void force_charshort_cast(int t
)
1893 /* XXX: add optimization if lvalue : just change type and offset */
1898 if (t
& VT_UNSIGNED
) {
1899 vpushi((1 << bits
) - 1);
1905 /* result must be signed or the SAR is converted to an SHL
1906 This was not the case when "t" was a signed short
1907 and the last value on the stack was an unsigned int */
1908 vtop
->type
.t
&= ~VT_UNSIGNED
;
1914 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1915 static void gen_cast(CType
*type
)
1917 int sbt
, dbt
, sf
, df
, c
, p
;
1919 /* special delayed cast for char/short */
1920 /* XXX: in some cases (multiple cascaded casts), it may still
1922 if (vtop
->r
& VT_MUSTCAST
) {
1923 vtop
->r
&= ~VT_MUSTCAST
;
1924 force_charshort_cast(vtop
->type
.t
);
1927 /* bitfields first get cast to ints */
1928 if (vtop
->type
.t
& VT_BITFIELD
) {
1932 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1933 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1938 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1939 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1941 /* constant case: we can do it now */
1942 /* XXX: in ISOC, cannot do it if error in convert */
1943 if (sbt
== VT_FLOAT
)
1944 vtop
->c
.ld
= vtop
->c
.f
;
1945 else if (sbt
== VT_DOUBLE
)
1946 vtop
->c
.ld
= vtop
->c
.d
;
1949 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1950 if (sbt
& VT_UNSIGNED
)
1951 vtop
->c
.ld
= vtop
->c
.ull
;
1953 vtop
->c
.ld
= vtop
->c
.ll
;
1955 if (sbt
& VT_UNSIGNED
)
1956 vtop
->c
.ld
= vtop
->c
.ui
;
1958 vtop
->c
.ld
= vtop
->c
.i
;
1961 if (dbt
== VT_FLOAT
)
1962 vtop
->c
.f
= (float)vtop
->c
.ld
;
1963 else if (dbt
== VT_DOUBLE
)
1964 vtop
->c
.d
= (double)vtop
->c
.ld
;
1965 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1966 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1967 } else if (sf
&& dbt
== VT_BOOL
) {
1968 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1971 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1972 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1973 vtop
->c
.ll
= vtop
->c
.ull
;
1974 else if (sbt
& VT_UNSIGNED
)
1975 vtop
->c
.ll
= vtop
->c
.ui
;
1976 #ifdef TCC_TARGET_X86_64
1977 else if (sbt
== VT_PTR
)
1980 else if (sbt
!= VT_LLONG
)
1981 vtop
->c
.ll
= vtop
->c
.i
;
1983 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1984 vtop
->c
.ull
= vtop
->c
.ll
;
1985 else if (dbt
== VT_BOOL
)
1986 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1987 #ifdef TCC_TARGET_X86_64
1988 else if (dbt
== VT_PTR
)
1991 else if (dbt
!= VT_LLONG
) {
1992 int s
, dt
, warr
= 0;
1994 dt
= dbt
& VT_BTYPE
;
1997 if((ll
!= (unsigned char)ll
) && (ll
!= (char)ll
))
2000 }else if (dt
== VT_SHORT
){
2001 if((ll
!= (unsigned short)ll
) && (ll
!= (short)ll
))
2005 if((ll
!= (unsigned int)ll
) && (ll
!= (int)ll
))
2009 if(warr
&& !is_force
){
2011 tcc_warning("large integer implicitly truncated to unsigned type");
2014 tcc_warning("overflow in implicit constant conversion");
2016 if(dbt
& VT_UNSIGNED
)
2017 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
2019 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
2022 } else if (p
&& dbt
== VT_BOOL
) {
2025 } else if (!nocode_wanted
) {
2026 /* non constant case: generate code */
2028 /* convert from fp to fp */
2031 /* convert int to fp */
2034 /* convert fp to int */
2035 if (dbt
== VT_BOOL
) {
2039 /* we handle char/short/etc... with generic code */
2040 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
2041 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
2045 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
2046 /* additional cast for char/short... */
2051 #ifndef TCC_TARGET_X86_64
2052 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
2053 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
2054 /* scalar to long long */
2055 /* machine independent conversion */
2057 /* generate high word */
2058 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2062 if (sbt
== VT_PTR
) {
2063 /* cast from pointer to int before we apply
2064 shift operation, which pointers don't support*/
2065 gen_cast(&int_type
);
2071 /* patch second register */
2072 vtop
[-1].r2
= vtop
->r
;
2076 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2077 (dbt
& VT_BTYPE
) == VT_PTR
||
2078 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2079 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2080 (sbt
& VT_BTYPE
) != VT_PTR
&&
2081 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2082 /* need to convert from 32bit to 64bit */
2084 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2085 /* x86_64 specific: movslq */
2087 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2091 } else if (dbt
== VT_BOOL
) {
2092 /* scalar to bool */
2095 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2096 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2097 if (sbt
== VT_PTR
) {
2098 vtop
->type
.t
= VT_INT
;
2099 tcc_warning("nonportable conversion from pointer to char/short");
2101 force_charshort_cast(dbt
);
2102 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2104 if (sbt
== VT_LLONG
) {
2105 /* from long long: just take low order word */
2109 /* if lvalue and single word type, nothing to do because
2110 the lvalue already contains the real type size (see
2111 VT_LVAL_xxx constants) */
2114 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2115 /* if we are casting between pointer types,
2116 we must update the VT_LVAL_xxx size */
2117 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2118 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2123 /* return type size as known at compile time. Put alignment at 'a' */
2124 ST_FUNC
int type_size(CType
*type
, int *a
)
2129 bt
= type
->t
& VT_BTYPE
;
2130 if (bt
== VT_STRUCT
) {
2135 } else if (bt
== VT_PTR
) {
2136 if (type
->t
& VT_ARRAY
) {
2140 ts
= type_size(&s
->type
, a
);
2142 if (ts
< 0 && s
->c
< 0)
2150 } else if (bt
== VT_LDOUBLE
) {
2152 return LDOUBLE_SIZE
;
2153 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2154 #ifdef TCC_TARGET_I386
2155 #ifdef TCC_TARGET_PE
2160 #elif defined(TCC_TARGET_ARM)
2170 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2173 } else if (bt
== VT_SHORT
) {
2176 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2180 /* char, void, function, _Bool */
2186 /* push type size as known at runtime time on top of value stack. Put
2188 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2190 if (type
->t
& VT_VLA
) {
2191 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2193 vpushi(type_size(type
, a
));
2197 static void vla_sp_save(void) {
2198 if (!(vla_flags
& VLA_SP_LOC_SET
)) {
2199 *vla_sp_loc
= (loc
-= PTR_SIZE
);
2200 vla_flags
|= VLA_SP_LOC_SET
;
2202 if (!(vla_flags
& VLA_SP_SAVED
)) {
2203 gen_vla_sp_save(*vla_sp_loc
);
2204 vla_flags
|= VLA_SP_SAVED
;
2208 /* return the pointed type of t */
2209 static inline CType
*pointed_type(CType
*type
)
2211 return &type
->ref
->type
;
2214 /* modify type so that its it is a pointer to type. */
2215 ST_FUNC
void mk_pointer(CType
*type
)
2218 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2219 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2223 /* compare function types. OLD functions match any new functions */
2224 static int is_compatible_func(CType
*type1
, CType
*type2
)
2230 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2232 /* check func_call */
2233 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2235 /* XXX: not complete */
2236 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2240 while (s1
!= NULL
) {
2243 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2253 /* return true if type1 and type2 are the same. If unqualified is
2254 true, qualifiers on the types are ignored.
2256 - enums are not checked as gcc __builtin_types_compatible_p ()
2258 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2262 t1
= type1
->t
& VT_TYPE
;
2263 t2
= type2
->t
& VT_TYPE
;
2265 /* strip qualifiers before comparing */
2266 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2267 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2269 /* Default Vs explicit signedness only matters for char */
2270 if ((t1
& VT_BTYPE
) != VT_BYTE
) {
2274 /* XXX: bitfields ? */
2277 /* test more complicated cases */
2278 bt1
= t1
& VT_BTYPE
;
2279 if (bt1
== VT_PTR
) {
2280 type1
= pointed_type(type1
);
2281 type2
= pointed_type(type2
);
2282 return is_compatible_types(type1
, type2
);
2283 } else if (bt1
== VT_STRUCT
) {
2284 return (type1
->ref
== type2
->ref
);
2285 } else if (bt1
== VT_FUNC
) {
2286 return is_compatible_func(type1
, type2
);
2292 /* return true if type1 and type2 are exactly the same (including
2295 static int is_compatible_types(CType
*type1
, CType
*type2
)
2297 return compare_types(type1
,type2
,0);
2300 /* return true if type1 and type2 are the same (ignoring qualifiers).
2302 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2304 return compare_types(type1
,type2
,1);
2307 /* print a type. If 'varstr' is not NULL, then the variable is also
2308 printed in the type */
2310 /* XXX: add array and function pointers */
2311 static void type_to_str(char *buf
, int buf_size
,
2312 CType
*type
, const char *varstr
)
2319 t
= type
->t
& VT_TYPE
;
2322 if (t
& VT_CONSTANT
)
2323 pstrcat(buf
, buf_size
, "const ");
2324 if (t
& VT_VOLATILE
)
2325 pstrcat(buf
, buf_size
, "volatile ");
2326 if ((t
& (VT_DEFSIGN
| VT_UNSIGNED
)) == (VT_DEFSIGN
| VT_UNSIGNED
))
2327 pstrcat(buf
, buf_size
, "unsigned ");
2328 else if (t
& VT_DEFSIGN
)
2329 pstrcat(buf
, buf_size
, "signed ");
2359 tstr
= "long double";
2361 pstrcat(buf
, buf_size
, tstr
);
2365 if (bt
== VT_STRUCT
)
2369 pstrcat(buf
, buf_size
, tstr
);
2370 v
= type
->ref
->v
& ~SYM_STRUCT
;
2371 if (v
>= SYM_FIRST_ANOM
)
2372 pstrcat(buf
, buf_size
, "<anonymous>");
2374 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2378 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2379 pstrcat(buf
, buf_size
, "(");
2381 while (sa
!= NULL
) {
2382 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2383 pstrcat(buf
, buf_size
, buf1
);
2386 pstrcat(buf
, buf_size
, ", ");
2388 pstrcat(buf
, buf_size
, ")");
2392 pstrcpy(buf1
, sizeof(buf1
), "*");
2394 pstrcat(buf1
, sizeof(buf1
), varstr
);
2395 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2399 pstrcat(buf
, buf_size
, " ");
2400 pstrcat(buf
, buf_size
, varstr
);
2405 /* verify type compatibility to store vtop in 'dt' type, and generate
2407 static void gen_assign_cast(CType
*dt
)
2409 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2410 char buf1
[256], buf2
[256];
2413 st
= &vtop
->type
; /* source type */
2414 dbt
= dt
->t
& VT_BTYPE
;
2415 sbt
= st
->t
& VT_BTYPE
;
2416 if (sbt
== VT_VOID
|| dbt
== VT_VOID
)
2417 tcc_error("cannot cast from/to void");
2418 if (dt
->t
& VT_CONSTANT
)
2419 tcc_warning("assignment of read-only location");
2422 /* special cases for pointers */
2423 /* '0' can also be a pointer */
2424 if (is_null_pointer(vtop
))
2426 /* accept implicit pointer to integer cast with warning */
2427 if (is_integer_btype(sbt
)) {
2428 tcc_warning("assignment makes pointer from integer without a cast");
2431 type1
= pointed_type(dt
);
2432 /* a function is implicitely a function pointer */
2433 if (sbt
== VT_FUNC
) {
2434 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2435 !is_compatible_types(pointed_type(dt
), st
))
2436 tcc_warning("assignment from incompatible pointer type");
2441 type2
= pointed_type(st
);
2442 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2443 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2444 /* void * can match anything */
2446 /* exact type match, except for unsigned */
2449 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2451 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2453 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2454 tcc_warning("assignment from incompatible pointer type");
2456 /* check const and volatile */
2457 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2458 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2459 tcc_warning("assignment discards qualifiers from pointer target type");
2465 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2466 tcc_warning("assignment makes integer from pointer without a cast");
2468 if (sbt
== VT_STRUCT
)
2470 /* XXX: more tests */
2475 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2476 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2477 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2479 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2480 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2481 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2489 /* store vtop in lvalue pushed on stack */
2490 ST_FUNC
void vstore(void)
2492 int sbt
, dbt
, ft
, cc
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2494 ft
= vtop
[-1].type
.t
;
2495 sbt
= vtop
->type
.t
& VT_BTYPE
;
2496 dbt
= ft
& VT_BTYPE
;
2497 cc
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
2498 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2499 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2500 && !(vtop
->type
.t
& VT_BITFIELD
) && !cc
) {
2501 /* optimize char/short casts */
2502 delayed_cast
= VT_MUSTCAST
;
2503 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2504 /* XXX: factorize */
2505 if (ft
& VT_CONSTANT
)
2506 tcc_warning("assignment of read-only location");
2509 if (!(ft
& VT_BITFIELD
))
2510 gen_assign_cast(&vtop
[-1].type
);
2513 if (sbt
== VT_STRUCT
) {
2514 /* if structure, only generate pointer */
2515 /* structure assignment : generate memcpy */
2516 /* XXX: optimize if small size */
2517 if (!nocode_wanted
) {
2518 size
= type_size(&vtop
->type
, &align
);
2522 vtop
->type
.t
= VT_PTR
;
2525 /* address of memcpy() */
2528 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2529 else if(!(align
& 3))
2530 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2533 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2538 vtop
->type
.t
= VT_PTR
;
2547 /* leave source on stack */
2548 } else if (ft
& VT_BITFIELD
) {
2549 /* bitfield store handling */
2550 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2551 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2552 /* remove bit field info to avoid loops */
2553 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2555 /* duplicate source into other register */
2560 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2561 gen_cast(&vtop
[-1].type
);
2562 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2565 /* duplicate destination */
2567 vtop
[-1] = vtop
[-2];
2569 /* mask and shift source */
2570 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2571 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2572 vpushll((1ULL << bit_size
) - 1ULL);
2574 vpushi((1 << bit_size
) - 1);
2580 /* load destination, mask and or with source */
2582 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2583 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2585 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2592 /* pop off shifted source from "duplicate source..." above */
2595 #ifdef CONFIG_TCC_BCHECK
2596 /* bound check case */
2597 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2603 if (!nocode_wanted
) {
2607 #ifdef TCC_TARGET_X86_64
2608 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2610 } else if ((ft
& VT_BTYPE
) == VT_QFLOAT
) {
2615 r
= gv(rc
); /* generate value */
2616 /* if lvalue was saved on stack, must read it */
2617 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2619 t
= get_reg(RC_INT
);
2620 #ifdef TCC_TARGET_X86_64
2625 sv
.r
= VT_LOCAL
| VT_LVAL
;
2626 sv
.c
.ul
= vtop
[-1].c
.ul
;
2628 vtop
[-1].r
= t
| VT_LVAL
;
2630 /* two word case handling : store second register at word + 4 (or +8 for x86-64) */
2631 #ifdef TCC_TARGET_X86_64
2632 if (((ft
& VT_BTYPE
) == VT_QLONG
) || ((ft
& VT_BTYPE
) == VT_QFLOAT
)) {
2633 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2635 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2636 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
2638 vtop
[-1].type
.t
= load_type
;
2641 /* convert to int to increment easily */
2642 vtop
->type
.t
= addr_type
;
2648 vtop
[-1].type
.t
= load_type
;
2649 /* XXX: it works because r2 is spilled last ! */
2650 store(vtop
->r2
, vtop
- 1);
2656 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2657 vtop
->r
|= delayed_cast
;
2661 /* post defines POST/PRE add. c is the token ++ or -- */
2662 ST_FUNC
void inc(int post
, int c
)
2665 vdup(); /* save lvalue */
2667 gv_dup(); /* duplicate value */
2672 vpushi(c
- TOK_MID
);
2674 vstore(); /* store value */
2676 vpop(); /* if post op, return saved value */
2679 /* Parse GNUC __attribute__ extension. Currently, the following
2680 extensions are recognized:
2681 - aligned(n) : set data/function alignment.
2682 - packed : force data alignment to 1
2683 - section(x) : generate data/code in this section.
2684 - unused : currently ignored, but may be used someday.
2685 - regparm(n) : pass function parameters in registers (i386 only)
2687 static void parse_attribute(AttributeDef
*ad
)
2691 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2695 while (tok
!= ')') {
2696 if (tok
< TOK_IDENT
)
2697 expect("attribute name");
2705 expect("section name");
2706 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2714 expect("alias(\"target\")");
2715 ad
->alias_target
= /* save string as token, for later */
2716 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2720 case TOK_VISIBILITY1
:
2721 case TOK_VISIBILITY2
:
2724 expect("visibility(\"default|hidden|internal|protected\")");
2725 if (!strcmp (tokc
.cstr
->data
, "default"))
2726 ad
->a
.visibility
= STV_DEFAULT
;
2727 else if (!strcmp (tokc
.cstr
->data
, "hidden"))
2728 ad
->a
.visibility
= STV_HIDDEN
;
2729 else if (!strcmp (tokc
.cstr
->data
, "internal"))
2730 ad
->a
.visibility
= STV_INTERNAL
;
2731 else if (!strcmp (tokc
.cstr
->data
, "protected"))
2732 ad
->a
.visibility
= STV_PROTECTED
;
2734 expect("visibility(\"default|hidden|internal|protected\")");
2743 if (n
<= 0 || (n
& (n
- 1)) != 0)
2744 tcc_error("alignment must be a positive power of two");
2761 /* currently, no need to handle it because tcc does not
2762 track unused objects */
2766 /* currently, no need to handle it because tcc does not
2767 track unused objects */
2772 ad
->a
.func_call
= FUNC_CDECL
;
2777 ad
->a
.func_call
= FUNC_STDCALL
;
2779 #ifdef TCC_TARGET_I386
2789 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
2795 ad
->a
.func_call
= FUNC_FASTCALLW
;
2802 ad
->a
.mode
= VT_LLONG
+ 1;
2805 ad
->a
.mode
= VT_SHORT
+ 1;
2808 ad
->a
.mode
= VT_INT
+ 1;
2811 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2818 ad
->a
.func_export
= 1;
2821 ad
->a
.func_import
= 1;
2824 if (tcc_state
->warn_unsupported
)
2825 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2826 /* skip parameters */
2828 int parenthesis
= 0;
2832 else if (tok
== ')')
2835 } while (parenthesis
&& tok
!= -1);
2848 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2849 static void struct_decl(CType
*type
, int u
, int tdef
)
2851 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
;
2852 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2853 Sym
*s
, *ss
, *ass
, **ps
;
2857 a
= tok
; /* save decl type */
2862 /* struct already defined ? return it */
2864 expect("struct/union/enum name");
2868 tcc_error("invalid type: '%s'", get_tok_str(v
, NULL
));
2870 } else if (tok
>= TOK_IDENT
&& !tdef
)
2871 tcc_error("unknown struct/union/enum");
2877 /* we put an undefined size for struct/union */
2878 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2879 s
->r
= 0; /* default alignment is zero as gcc */
2880 /* put struct/union/enum name in type */
2888 tcc_error("struct/union/enum already defined");
2889 /* cannot be empty */
2891 /* non empty enums are not allowed */
2892 if (a
== TOK_ENUM
) {
2896 expect("identifier");
2898 if (ss
&& !local_stack
)
2899 tcc_error("redefinition of enumerator '%s'",
2900 get_tok_str(v
, NULL
));
2906 /* enum symbols have static storage */
2907 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2908 ss
->type
.t
|= VT_STATIC
;
2913 /* NOTE: we accept a trailing comma */
2917 s
->c
= type_size(&int_type
, &align
);
2926 while (tok
!= '}') {
2927 parse_btype(&btype
, &ad
);
2930 tcc_error("flexible array member '%s' not at the end of struct",
2931 get_tok_str(v
, NULL
));
2936 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2937 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2938 expect("identifier");
2939 if (type_size(&type1
, &align
) < 0) {
2940 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
))
2943 tcc_error("field '%s' has incomplete type",
2944 get_tok_str(v
, NULL
));
2946 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2947 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2948 tcc_error("invalid type for '%s'",
2949 get_tok_str(v
, NULL
));
2953 bit_size
= expr_const();
2954 /* XXX: handle v = 0 case for messages */
2956 tcc_error("negative width in bit-field '%s'",
2957 get_tok_str(v
, NULL
));
2958 if (v
&& bit_size
== 0)
2959 tcc_error("zero width for bit-field '%s'",
2960 get_tok_str(v
, NULL
));
2962 size
= type_size(&type1
, &align
);
2964 if (align
< ad
.a
.aligned
)
2965 align
= ad
.a
.aligned
;
2966 } else if (ad
.a
.packed
) {
2968 } else if (*tcc_state
->pack_stack_ptr
) {
2969 if (align
> *tcc_state
->pack_stack_ptr
)
2970 align
= *tcc_state
->pack_stack_ptr
;
2973 if (bit_size
>= 0) {
2974 bt
= type1
.t
& VT_BTYPE
;
2981 tcc_error("bitfields must have scalar type");
2983 if (bit_size
> bsize
) {
2984 tcc_error("width of '%s' exceeds its type",
2985 get_tok_str(v
, NULL
));
2986 } else if (bit_size
== bsize
) {
2987 /* no need for bit fields */
2989 } else if (bit_size
== 0) {
2990 /* XXX: what to do if only padding in a
2992 /* zero size: means to pad */
2995 /* we do not have enough room ?
2996 did the type change?
2998 if ((bit_pos
+ bit_size
) > bsize
||
2999 bt
!= prevbt
|| a
== TOK_UNION
)
3002 /* XXX: handle LSB first */
3003 type1
.t
|= VT_BITFIELD
|
3004 (bit_pos
<< VT_STRUCT_SHIFT
) |
3005 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
3006 bit_pos
+= bit_size
;
3012 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3013 /* add new memory data only if starting
3015 if (lbit_pos
== 0) {
3016 if (a
== TOK_STRUCT
) {
3017 c
= (c
+ align
- 1) & -align
;
3026 if (align
> maxalign
)
3030 printf("add field %s offset=%d",
3031 get_tok_str(v
, NULL
), offset
);
3032 if (type1
.t
& VT_BITFIELD
) {
3033 printf(" pos=%d size=%d",
3034 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3035 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3040 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3042 while ((ass
= ass
->next
) != NULL
) {
3043 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3048 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3052 if (tok
== ';' || tok
== TOK_EOF
)
3060 tcc_error("flexible array member '%s' in otherwise empty struct", get_tok_str(v
, NULL
));
3061 /* store size and alignment */
3062 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3068 /* return 1 if basic type is a type size (short, long, long long) */
3069 ST_FUNC
int is_btype_size(int bt
)
3071 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3074 /* return 0 if no type declaration. otherwise, return the basic type
3077 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3079 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3083 memset(ad
, 0, sizeof(AttributeDef
));
3091 /* currently, we really ignore extension */
3102 tcc_error("too many basic types");
3104 bt_size
= is_btype_size (u
& VT_BTYPE
);
3105 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3120 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3121 #ifndef TCC_TARGET_PE
3122 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3124 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3125 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3139 if ((t
& VT_BTYPE
) == VT_LONG
) {
3140 #ifdef TCC_TARGET_PE
3141 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3143 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3151 struct_decl(&type1
, VT_ENUM
, t
& VT_TYPEDEF
);
3154 type
->ref
= type1
.ref
;
3158 struct_decl(&type1
, VT_STRUCT
, t
& VT_TYPEDEF
);
3161 /* type modifiers */
3177 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3178 tcc_error("signed and unsigned modifier");
3191 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3192 tcc_error("signed and unsigned modifier");
3193 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3218 /* GNUC attribute */
3219 case TOK_ATTRIBUTE1
:
3220 case TOK_ATTRIBUTE2
:
3221 parse_attribute(ad
);
3224 t
= (t
& ~VT_BTYPE
) | u
;
3232 parse_expr_type(&type1
);
3233 /* remove all storage modifiers except typedef */
3234 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3240 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3242 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3243 type
->ref
= s
->type
.ref
;
3245 /* get attributes from typedef */
3246 if (0 == ad
->a
.aligned
)
3247 ad
->a
.aligned
= s
->a
.aligned
;
3248 if (0 == ad
->a
.func_call
)
3249 ad
->a
.func_call
= s
->a
.func_call
;
3250 ad
->a
.packed
|= s
->a
.packed
;
3259 if (tcc_state
->char_is_unsigned
) {
3260 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3264 /* long is never used as type */
3265 if ((t
& VT_BTYPE
) == VT_LONG
)
3266 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3267 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3269 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3275 /* convert a function parameter type (array to pointer and function to
3276 function pointer) */
3277 static inline void convert_parameter_type(CType
*pt
)
3279 /* remove const and volatile qualifiers (XXX: const could be used
3280 to indicate a const function parameter */
3281 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3282 /* array must be transformed to pointer according to ANSI C */
3284 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3289 ST_FUNC
void parse_asm_str(CString
*astr
)
3292 /* read the string */
3294 expect("string constant");
3296 while (tok
== TOK_STR
) {
3297 /* XXX: add \0 handling too ? */
3298 cstr_cat(astr
, tokc
.cstr
->data
);
3301 cstr_ccat(astr
, '\0');
3304 /* Parse an asm label and return the label
3305 * Don't forget to free the CString in the caller! */
3306 static void asm_label_instr(CString
*astr
)
3309 parse_asm_str(astr
);
3312 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3316 static void post_type(CType
*type
, AttributeDef
*ad
)
3318 int n
, l
, t1
, arg_size
, align
;
3319 Sym
**plast
, *s
, *first
;
3324 /* function declaration */
3332 /* read param name and compute offset */
3333 if (l
!= FUNC_OLD
) {
3334 if (!parse_btype(&pt
, &ad1
)) {
3336 tcc_error("invalid type");
3343 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3345 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3346 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3347 tcc_error("parameter declared as void");
3348 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3353 expect("identifier");
3357 convert_parameter_type(&pt
);
3358 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3364 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3371 /* if no parameters, then old type prototype */
3375 /* NOTE: const is ignored in returned type as it has a special
3376 meaning in gcc / C++ */
3377 type
->t
&= ~VT_CONSTANT
;
3378 /* some ancient pre-K&R C allows a function to return an array
3379 and the array brackets to be put after the arguments, such
3380 that "int c()[]" means something like "int[] c()" */
3383 skip(']'); /* only handle simple "[]" */
3386 /* we push a anonymous symbol which will contain the function prototype */
3387 ad
->a
.func_args
= arg_size
;
3388 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3393 } else if (tok
== '[') {
3394 /* array definition */
3396 if (tok
== TOK_RESTRICT1
)
3401 if (!local_stack
|| nocode_wanted
)
3402 vpushi(expr_const());
3404 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3407 tcc_error("invalid array size");
3409 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3410 tcc_error("size of variable length array should be an integer");
3415 /* parse next post type */
3416 post_type(type
, ad
);
3417 if (type
->t
== VT_FUNC
)
3418 tcc_error("declaration of an array of functions");
3419 t1
|= type
->t
& VT_VLA
;
3422 loc
-= type_size(&int_type
, &align
);
3426 vla_runtime_type_size(type
, &align
);
3428 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3435 /* we push an anonymous symbol which will contain the array
3437 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3438 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3443 /* Parse a type declaration (except basic type), and return the type
3444 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3445 expected. 'type' should contain the basic type. 'ad' is the
3446 attribute definition of the basic type. It can be modified by
3449 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3452 CType type1
, *type2
;
3453 int qualifiers
, storage
;
3455 while (tok
== '*') {
3463 qualifiers
|= VT_CONSTANT
;
3468 qualifiers
|= VT_VOLATILE
;
3476 type
->t
|= qualifiers
;
3479 /* XXX: clarify attribute handling */
3480 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3481 parse_attribute(ad
);
3483 /* recursive type */
3484 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3485 type1
.t
= 0; /* XXX: same as int */
3488 /* XXX: this is not correct to modify 'ad' at this point, but
3489 the syntax is not clear */
3490 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3491 parse_attribute(ad
);
3492 type_decl(&type1
, ad
, v
, td
);
3495 /* type identifier */
3496 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3500 if (!(td
& TYPE_ABSTRACT
))
3501 expect("identifier");
3505 storage
= type
->t
& VT_STORAGE
;
3506 type
->t
&= ~VT_STORAGE
;
3507 if (storage
& VT_STATIC
) {
3508 int saved_nocode_wanted
= nocode_wanted
;
3510 post_type(type
, ad
);
3511 nocode_wanted
= saved_nocode_wanted
;
3513 post_type(type
, ad
);
3515 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3516 parse_attribute(ad
);
3520 /* append type at the end of type1 */
3533 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3534 ST_FUNC
int lvalue_type(int t
)
3539 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3541 else if (bt
== VT_SHORT
)
3545 if (t
& VT_UNSIGNED
)
3546 r
|= VT_LVAL_UNSIGNED
;
3550 /* indirection with full error checking and bound check */
3551 ST_FUNC
void indir(void)
3553 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3554 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3558 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3560 vtop
->type
= *pointed_type(&vtop
->type
);
3561 /* Arrays and functions are never lvalues */
3562 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3563 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3564 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3565 /* if bound checking, the referenced pointer must be checked */
3566 #ifdef CONFIG_TCC_BCHECK
3567 if (tcc_state
->do_bounds_check
)
3568 vtop
->r
|= VT_MUSTBOUND
;
3573 /* pass a parameter to a function and do type checking and casting */
3574 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3579 func_type
= func
->c
;
3580 if (func_type
== FUNC_OLD
||
3581 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3582 /* default casting : only need to convert float to double */
3583 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3586 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3587 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3590 } else if (arg
== NULL
) {
3591 tcc_error("too many arguments to function");
3594 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3595 gen_assign_cast(&type
);
3599 /* parse an expression of the form '(type)' or '(expr)' and return its
3601 static void parse_expr_type(CType
*type
)
3607 if (parse_btype(type
, &ad
)) {
3608 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3615 static void parse_type(CType
*type
)
3620 if (!parse_btype(type
, &ad
)) {
3623 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3626 static void vpush_tokc(int t
)
3631 vsetc(&type
, VT_CONST
, &tokc
);
3634 ST_FUNC
void unary(void)
3636 int n
, t
, align
, size
, r
, sizeof_caller
;
3640 static int in_sizeof
= 0;
3642 sizeof_caller
= in_sizeof
;
3644 /* XXX: GCC 2.95.3 does not generate a table although it should be
3658 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3662 vpush_tokc(VT_LLONG
);
3666 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3670 vpush_tokc(VT_FLOAT
);
3674 vpush_tokc(VT_DOUBLE
);
3678 vpush_tokc(VT_LDOUBLE
);
3681 case TOK___FUNCTION__
:
3683 goto tok_identifier
;
3689 /* special function name identifier */
3690 len
= strlen(funcname
) + 1;
3691 /* generate char[len] type */
3696 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3697 ptr
= section_ptr_add(data_section
, len
);
3698 memcpy(ptr
, funcname
, len
);
3703 #ifdef TCC_TARGET_PE
3704 t
= VT_SHORT
| VT_UNSIGNED
;
3710 /* string parsing */
3713 if (tcc_state
->warn_write_strings
)
3718 memset(&ad
, 0, sizeof(AttributeDef
));
3719 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3724 if (parse_btype(&type
, &ad
)) {
3725 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3727 /* check ISOC99 compound literal */
3729 /* data is allocated locally by default */
3734 /* all except arrays are lvalues */
3735 if (!(type
.t
& VT_ARRAY
))
3736 r
|= lvalue_type(type
.t
);
3737 memset(&ad
, 0, sizeof(AttributeDef
));
3738 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3740 if (sizeof_caller
) {
3749 } else if (tok
== '{') {
3750 /* save all registers */
3752 /* statement expression : we do not accept break/continue
3753 inside as GCC does */
3754 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3769 /* functions names must be treated as function pointers,
3770 except for unary '&' and sizeof. Since we consider that
3771 functions are not lvalues, we only have to handle it
3772 there and in function calls. */
3773 /* arrays can also be used although they are not lvalues */
3774 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3775 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3777 mk_pointer(&vtop
->type
);
3783 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3785 boolean
.t
= VT_BOOL
;
3787 vtop
->c
.i
= !vtop
->c
.i
;
3788 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3789 vtop
->c
.i
= vtop
->c
.i
^ 1;
3792 vseti(VT_JMP
, gvtst(1, 0));
3804 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3805 tcc_error("pointer not accepted for unary plus");
3806 /* In order to force cast, we add zero, except for floating point
3807 where we really need an noop (otherwise -0.0 will be transformed
3809 if (!is_float(vtop
->type
.t
)) {
3820 unary_type(&type
); // Perform a in_sizeof = 0;
3821 size
= type_size(&type
, &align
);
3822 if (t
== TOK_SIZEOF
) {
3823 if (!(type
.t
& VT_VLA
)) {
3825 tcc_error("sizeof applied to an incomplete type");
3826 if(type
.t
& VT_BITFIELD
)
3827 tcc_error("'%s' applied to a bit-field", get_tok_str(t
, NULL
));
3830 vla_runtime_type_size(&type
, &align
);
3835 vtop
->type
.t
|= VT_UNSIGNED
;
3838 case TOK_builtin_types_compatible_p
:
3847 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3848 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3849 vpushi(is_compatible_types(&type1
, &type2
));
3852 case TOK_builtin_constant_p
:
3854 int saved_nocode_wanted
, res
;
3857 saved_nocode_wanted
= nocode_wanted
;
3860 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3862 nocode_wanted
= saved_nocode_wanted
;
3867 case TOK_builtin_frame_address
:
3873 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3874 tcc_error("__builtin_frame_address only takes positive integers");
3881 vset(&type
, VT_LOCAL
, 0); /* local frame */
3883 mk_pointer(&vtop
->type
);
3884 indir(); /* -> parent frame */
3888 #ifdef TCC_TARGET_X86_64
3889 #ifdef TCC_TARGET_PE
3890 case TOK_builtin_va_start
:
3898 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
3899 tcc_error("__builtin_va_start expects a local variable");
3900 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
3901 vtop
->type
= char_pointer_type
;
3906 case TOK_builtin_va_arg_types
:
3913 vpushi(classify_x86_64_va_arg(&type
));
3928 t
= vtop
->type
.t
& VT_BTYPE
;
3930 /* In IEEE negate(x) isn't subtract(0,x), but rather
3935 else if (t
== VT_DOUBLE
)
3946 goto tok_identifier
;
3948 /* allow to take the address of a label */
3949 if (tok
< TOK_UIDENT
)
3950 expect("label identifier");
3951 s
= label_find(tok
);
3953 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3955 if (s
->r
== LABEL_DECLARED
)
3956 s
->r
= LABEL_FORWARD
;
3959 s
->type
.t
= VT_VOID
;
3960 mk_pointer(&s
->type
);
3961 s
->type
.t
|= VT_STATIC
;
3963 vpushsym(&s
->type
, s
);
3967 // special qnan , snan and infinity values
3969 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3973 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3977 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3986 expect("identifier");
3989 const char *name
= get_tok_str(t
, NULL
);
3991 tcc_error("'%s' undeclared", name
);
3992 /* for simple function calls, we tolerate undeclared
3993 external reference to int() function */
3994 if (tcc_state
->warn_implicit_function_declaration
3995 #ifdef TCC_TARGET_PE
3996 /* people must be warned about using undeclared WINAPI functions
3997 (which usually start with uppercase letter) */
3998 || (name
[0] >= 'A' && name
[0] <= 'Z')
4001 tcc_warning("implicit declaration of function '%s'", name
);
4002 s
= external_sym(t
, &func_old_type
, 0, NULL
);
4004 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
4005 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
4006 /* if referencing an inline function, then we generate a
4007 symbol to it if not already done. It will have the
4008 effect to generate code for it at the end of the
4009 compilation unit. Inline function as always
4010 generated in the text section. */
4012 put_extern_sym(s
, text_section
, 0, 0);
4013 r
= VT_SYM
| VT_CONST
;
4017 vset(&s
->type
, r
, s
->c
);
4018 /* if forward reference, we must point to s */
4019 if (vtop
->r
& VT_SYM
) {
4021 vtop
->c
.ptr_offset
= 0;
4026 /* post operations */
4028 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4031 } else if (tok
== '.' || tok
== TOK_ARROW
) {
4034 if (tok
== TOK_ARROW
)
4036 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4040 /* expect pointer on structure */
4041 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4042 expect("struct or union");
4046 while ((s
= s
->next
) != NULL
) {
4051 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
4052 /* add field offset to pointer */
4053 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4056 /* change type to field type, and set to lvalue */
4057 vtop
->type
= s
->type
;
4058 vtop
->type
.t
|= qualifiers
;
4059 /* an array is never an lvalue */
4060 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4061 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4062 #ifdef CONFIG_TCC_BCHECK
4063 /* if bound checking, the referenced pointer must be checked */
4064 if (tcc_state
->do_bounds_check
)
4065 vtop
->r
|= VT_MUSTBOUND
;
4069 } else if (tok
== '[') {
4075 } else if (tok
== '(') {
4078 int nb_args
, ret_nregs
, ret_align
, variadic
;
4081 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4082 /* pointer test (no array accepted) */
4083 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4084 vtop
->type
= *pointed_type(&vtop
->type
);
4085 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4089 expect("function pointer");
4092 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4094 /* get return type */
4097 sa
= s
->next
; /* first parameter */
4100 /* compute first implicit argument if a structure is returned */
4101 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4102 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4103 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4106 /* get some space for the returned structure */
4107 size
= type_size(&s
->type
, &align
);
4108 loc
= (loc
- size
) & -align
;
4110 ret
.r
= VT_LOCAL
| VT_LVAL
;
4111 /* pass it as 'int' to avoid structure arg passing
4113 vseti(VT_LOCAL
, loc
);
4123 /* return in register */
4124 if (is_float(ret
.type
.t
)) {
4125 ret
.r
= reg_fret(ret
.type
.t
);
4126 #ifdef TCC_TARGET_X86_64
4127 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4131 #ifdef TCC_TARGET_X86_64
4132 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4134 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4144 gfunc_param_typed(s
, sa
);
4154 tcc_error("too few arguments to function");
4156 if (!nocode_wanted
) {
4157 gfunc_call(nb_args
);
4159 vtop
-= (nb_args
+ 1);
4163 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4164 vsetc(&ret
.type
, r
, &ret
.c
);
4165 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4168 /* handle packed struct return */
4169 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4172 size
= type_size(&s
->type
, &align
);
4173 loc
= (loc
- size
) & -align
;
4177 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4181 if (--ret_nregs
== 0)
4183 /* XXX: compatible with arm only: ret_align == register_size */
4184 offset
+= ret_align
;
4186 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4194 ST_FUNC
void expr_prod(void)
4199 while (tok
== '*' || tok
== '/' || tok
== '%') {
4207 ST_FUNC
void expr_sum(void)
4212 while (tok
== '+' || tok
== '-') {
4220 static void expr_shift(void)
4225 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4233 static void expr_cmp(void)
4238 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4239 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4247 static void expr_cmpeq(void)
4252 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4260 static void expr_and(void)
4263 while (tok
== '&') {
4270 static void expr_xor(void)
4273 while (tok
== '^') {
4280 static void expr_or(void)
4283 while (tok
== '|') {
4290 /* XXX: fix this mess */
4291 static void expr_land_const(void)
4294 while (tok
== TOK_LAND
) {
4301 /* XXX: fix this mess */
4302 static void expr_lor_const(void)
4305 while (tok
== TOK_LOR
) {
4312 /* only used if non constant */
4313 static void expr_land(void)
4318 if (tok
== TOK_LAND
) {
4323 if (tok
!= TOK_LAND
) {
4333 static void expr_lor(void)
4338 if (tok
== TOK_LOR
) {
4343 if (tok
!= TOK_LOR
) {
4353 /* XXX: better constant handling */
4354 static void expr_cond(void)
4356 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4358 CType type
, type1
, type2
;
4365 boolean
.t
= VT_BOOL
;
4371 if (tok
!= ':' || !gnu_ext
) {
4386 if (vtop
!= vstack
) {
4387 /* needed to avoid having different registers saved in
4389 if (is_float(vtop
->type
.t
)) {
4391 #ifdef TCC_TARGET_X86_64
4392 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4402 if (tok
== ':' && gnu_ext
) {
4410 sv
= *vtop
; /* save value to handle it later */
4411 vtop
--; /* no vpop so that FP stack is not flushed */
4419 bt1
= t1
& VT_BTYPE
;
4421 bt2
= t2
& VT_BTYPE
;
4422 /* cast operands to correct type according to ISOC rules */
4423 if (is_float(bt1
) || is_float(bt2
)) {
4424 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4425 type
.t
= VT_LDOUBLE
;
4426 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4431 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4432 /* cast to biggest op */
4434 /* convert to unsigned if it does not fit in a long long */
4435 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4436 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4437 type
.t
|= VT_UNSIGNED
;
4438 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4439 /* If one is a null ptr constant the result type
4441 if (is_null_pointer (vtop
))
4443 else if (is_null_pointer (&sv
))
4445 /* XXX: test pointer compatibility, C99 has more elaborate
4449 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4450 /* XXX: test function pointer compatibility */
4451 type
= bt1
== VT_FUNC
? type1
: type2
;
4452 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4453 /* XXX: test structure compatibility */
4454 type
= bt1
== VT_STRUCT
? type1
: type2
;
4455 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4456 /* NOTE: as an extension, we accept void on only one side */
4459 /* integer operations */
4461 /* convert to unsigned if it does not fit in an integer */
4462 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4463 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4464 type
.t
|= VT_UNSIGNED
;
4467 /* now we convert second operand */
4469 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4472 if (is_float(type
.t
)) {
4474 #ifdef TCC_TARGET_X86_64
4475 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4479 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4480 /* for long longs, we use fixed registers to avoid having
4481 to handle a complicated move */
4486 /* this is horrible, but we must also convert first
4490 /* put again first value and cast it */
4493 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4496 move_reg(r2
, r1
, type
.t
);
4503 static void expr_eq(void)
4509 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4510 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4511 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4526 ST_FUNC
void gexpr(void)
4537 /* parse an expression and return its type without any side effect. */
4538 static void expr_type(CType
*type
)
4540 int saved_nocode_wanted
;
4542 saved_nocode_wanted
= nocode_wanted
;
4547 nocode_wanted
= saved_nocode_wanted
;
4550 /* parse a unary expression and return its type without any side
4552 static void unary_type(CType
*type
)
4564 /* parse a constant expression and return value in vtop. */
4565 static void expr_const1(void)
4574 /* parse an integer constant and return its value. */
4575 ST_FUNC
int expr_const(void)
4579 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4580 expect("constant expression");
4586 /* return the label token if current token is a label, otherwise
4588 static int is_label(void)
4592 /* fast test first */
4593 if (tok
< TOK_UIDENT
)
4595 /* no need to save tokc because tok is an identifier */
4602 unget_tok(last_tok
);
4607 static void label_or_decl(int l
)
4611 /* fast test first */
4612 if (tok
>= TOK_UIDENT
)
4614 /* no need to save tokc because tok is an identifier */
4618 unget_tok(last_tok
);
4621 unget_tok(last_tok
);
4626 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4627 int case_reg
, int is_expr
)
4630 Sym
*s
, *frame_bottom
;
4632 /* generate line number info */
4633 if (tcc_state
->do_debug
&&
4634 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4635 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4637 last_line_num
= file
->line_num
;
4641 /* default return value is (void) */
4643 vtop
->type
.t
= VT_VOID
;
4646 if (tok
== TOK_IF
) {
4653 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4655 if (c
== TOK_ELSE
) {
4659 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4660 gsym(d
); /* patch else jmp */
4663 } else if (tok
== TOK_WHILE
) {
4671 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4675 } else if (tok
== '{') {
4677 int block_vla_sp_loc
, *saved_vla_sp_loc
, saved_vla_flags
;
4680 /* record local declaration stack position */
4682 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4683 frame_bottom
->next
= scope_stack_bottom
;
4684 scope_stack_bottom
= frame_bottom
;
4685 llabel
= local_label_stack
;
4687 /* save VLA state */
4688 block_vla_sp_loc
= *(saved_vla_sp_loc
= vla_sp_loc
);
4689 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4690 vla_sp_loc
= &block_vla_sp_loc
;
4692 saved_vla_flags
= vla_flags
;
4693 vla_flags
|= VLA_NEED_NEW_FRAME
;
4695 /* handle local labels declarations */
4696 if (tok
== TOK_LABEL
) {
4699 if (tok
< TOK_UIDENT
)
4700 expect("label identifier");
4701 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4711 while (tok
!= '}') {
4712 label_or_decl(VT_LOCAL
);
4716 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4719 /* pop locally defined labels */
4720 label_pop(&local_label_stack
, llabel
);
4722 /* XXX: this solution makes only valgrind happy...
4723 triggered by gcc.c-torture/execute/20000917-1.c */
4725 switch(vtop
->type
.t
& VT_BTYPE
) {
4730 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4732 tcc_error("unsupported expression type");
4735 /* pop locally defined symbols */
4736 scope_stack_bottom
= scope_stack_bottom
->next
;
4737 sym_pop(&local_stack
, s
);
4739 /* Pop VLA frames and restore stack pointer if required */
4740 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4741 *saved_vla_sp_loc
= block_vla_sp_loc
;
4742 if (vla_sp_loc
!= (saved_vla_sp_loc
== &vla_sp_root_loc
? &vla_sp_root_loc
: &block_vla_sp_loc
)) {
4743 vla_sp_loc
= saved_vla_sp_loc
;
4744 gen_vla_sp_restore(*vla_sp_loc
);
4746 vla_flags
= (vla_flags
& ~VLA_SCOPE_FLAGS
) | (saved_vla_flags
& VLA_SCOPE_FLAGS
);
4749 } else if (tok
== TOK_RETURN
) {
4753 gen_assign_cast(&func_vt
);
4754 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4755 CType type
, ret_type
;
4756 int ret_align
, ret_nregs
;
4757 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
4759 if (0 == ret_nregs
) {
4760 /* if returning structure, must copy it to implicit
4761 first pointer arg location */
4764 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4767 /* copy structure value to pointer */
4770 /* returning structure packed into registers */
4771 int r
, size
, addr
, align
;
4772 size
= type_size(&func_vt
,&align
);
4773 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& (ret_align
-1)))
4774 && (align
& (ret_align
-1))) {
4775 loc
= (loc
- size
) & -align
;
4778 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4781 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
4783 vtop
->type
= ret_type
;
4784 if (is_float(ret_type
.t
))
4785 r
= rc_fret(ret_type
.t
);
4791 if (--ret_nregs
== 0)
4793 /* We assume that when a structure is returned in multiple
4794 registers, their classes are consecutive values of the
4797 /* XXX: compatible with arm only: ret_align == register_size */
4798 vtop
->c
.i
+= ret_align
;
4799 vtop
->r
= VT_LOCAL
| VT_LVAL
;
4802 } else if (is_float(func_vt
.t
)) {
4803 gv(rc_fret(func_vt
.t
));
4807 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4810 rsym
= gjmp(rsym
); /* jmp */
4811 } else if (tok
== TOK_BREAK
) {
4814 tcc_error("cannot break");
4815 *bsym
= gjmp(*bsym
);
4818 } else if (tok
== TOK_CONTINUE
) {
4821 tcc_error("cannot continue");
4822 *csym
= gjmp(*csym
);
4825 } else if (tok
== TOK_FOR
) {
4830 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4831 frame_bottom
->next
= scope_stack_bottom
;
4832 scope_stack_bottom
= frame_bottom
;
4834 /* c99 for-loop init decl? */
4835 if (!decl0(VT_LOCAL
, 1)) {
4836 /* no, regular for-loop init expr */
4860 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4864 scope_stack_bottom
= scope_stack_bottom
->next
;
4865 sym_pop(&local_stack
, s
);
4867 if (tok
== TOK_DO
) {
4872 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4883 if (tok
== TOK_SWITCH
) {
4887 /* XXX: other types than integer */
4888 case_reg
= gv(RC_INT
);
4892 b
= gjmp(0); /* jump to first case */
4894 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4895 /* if no default, jmp after switch */
4903 if (tok
== TOK_CASE
) {
4910 if (gnu_ext
&& tok
== TOK_DOTS
) {
4914 tcc_warning("empty case range");
4916 /* since a case is like a label, we must skip it with a jmp */
4923 *case_sym
= gtst(1, 0);
4926 *case_sym
= gtst(1, 0);
4930 *case_sym
= gtst(1, *case_sym
);
4935 goto block_after_label
;
4937 if (tok
== TOK_DEFAULT
) {
4943 tcc_error("too many 'default'");
4946 goto block_after_label
;
4948 if (tok
== TOK_GOTO
) {
4950 if (tok
== '*' && gnu_ext
) {
4954 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4957 } else if (tok
>= TOK_UIDENT
) {
4958 s
= label_find(tok
);
4959 /* put forward definition if needed */
4961 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4963 if (s
->r
== LABEL_DECLARED
)
4964 s
->r
= LABEL_FORWARD
;
4966 /* label already defined */
4967 if (vla_flags
& VLA_IN_SCOPE
) {
4968 /* If VLAs are in use, save the current stack pointer and
4969 reset the stack pointer to what it was at function entry
4970 (label will restore stack pointer in inner scopes) */
4972 gen_vla_sp_restore(vla_sp_root_loc
);
4974 if (s
->r
& LABEL_FORWARD
)
4975 s
->jnext
= gjmp(s
->jnext
);
4977 gjmp_addr(s
->jnext
);
4980 expect("label identifier");
4983 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4989 if (vla_flags
& VLA_IN_SCOPE
) {
4990 /* save/restore stack pointer across label
4991 this is a no-op when combined with the load immediately
4992 after the label unless we arrive via goto */
4997 if (s
->r
== LABEL_DEFINED
)
4998 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
5000 s
->r
= LABEL_DEFINED
;
5002 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
5005 if (vla_flags
& VLA_IN_SCOPE
) {
5006 gen_vla_sp_restore(*vla_sp_loc
);
5007 vla_flags
|= VLA_NEED_NEW_FRAME
;
5009 /* we accept this, but it is a mistake */
5012 tcc_warning("deprecated use of label at end of compound statement");
5016 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
5019 /* expression case */
5034 /* t is the array or struct type. c is the array or struct
5035 address. cur_index/cur_field is the pointer to the current
5036 value. 'size_only' is true if only size info is needed (only used
5038 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5039 int *cur_index
, Sym
**cur_field
,
5043 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5049 if (gnu_ext
&& (l
= is_label()) != 0)
5052 while (tok
== '[' || tok
== '.') {
5054 if (!(type
->t
& VT_ARRAY
))
5055 expect("array type");
5057 index
= expr_const();
5058 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5059 expect("invalid index");
5060 if (tok
== TOK_DOTS
&& gnu_ext
) {
5062 index_last
= expr_const();
5063 if (index_last
< 0 ||
5064 (s
->c
>= 0 && index_last
>= s
->c
) ||
5066 expect("invalid index");
5072 *cur_index
= index_last
;
5073 type
= pointed_type(type
);
5074 elem_size
= type_size(type
, &align
);
5075 c
+= index
* elem_size
;
5076 /* NOTE: we only support ranges for last designator */
5077 nb_elems
= index_last
- index
+ 1;
5078 if (nb_elems
!= 1) {
5087 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5088 expect("struct/union type");
5100 /* XXX: fix this mess by using explicit storage field */
5102 type1
.t
|= (type
->t
& ~VT_TYPE
);
5116 if (type
->t
& VT_ARRAY
) {
5118 if (s
->c
>= 0 && index
>= s
->c
){
5120 tcc_warning("excess elements in array initializer");
5124 type
= pointed_type(type
);
5125 c
+= index
* type_size(type
, &align
);
5130 /* XXX: fix this mess by using explicit storage field */
5132 type1
.t
|= (type
->t
& ~VT_TYPE
);
5137 tcc_warning("excess elements in %s initializer",
5138 get_tok_str(s
->type
.t
, NULL
));
5144 decl_initializer(type
, sec
, c
, 0, size_only
);
5146 /* XXX: make it more general */
5147 if (!size_only
&& nb_elems
> 1) {
5148 unsigned long c_end
;
5153 tcc_error("range init not supported yet for dynamic storage");
5154 c_end
= c
+ nb_elems
* elem_size
;
5155 if (c_end
> sec
->data_allocated
)
5156 section_realloc(sec
, c_end
);
5157 src
= sec
->data
+ c
;
5159 for(i
= 1; i
< nb_elems
; i
++) {
5161 memcpy(dst
, src
, elem_size
);
5167 #define EXPR_CONST 1
5170 /* store a value or an expression directly in global data or in local array */
5171 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5172 int v
, int expr_type
)
5174 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5176 unsigned long long bit_mask
;
5184 /* compound literals must be allocated globally in this case */
5185 saved_global_expr
= global_expr
;
5188 global_expr
= saved_global_expr
;
5189 /* NOTE: symbols are accepted */
5190 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5191 tcc_error("initializer element is not constant");
5199 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5202 /* XXX: not portable */
5203 /* XXX: generate error if incorrect relocation */
5204 gen_assign_cast(&dtype
);
5205 bt
= type
->t
& VT_BTYPE
;
5206 /* we'll write at most 12 bytes */
5207 if (c
+ 12 > sec
->data_allocated
) {
5208 section_realloc(sec
, c
+ 12);
5210 ptr
= sec
->data
+ c
;
5211 /* XXX: make code faster ? */
5212 if (!(type
->t
& VT_BITFIELD
)) {
5217 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5218 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5219 bit_mask
= (1LL << bit_size
) - 1;
5221 if ((vtop
->r
& VT_SYM
) &&
5227 (bt
== VT_INT
&& bit_size
!= 32)))
5228 tcc_error("initializer element is not computable at load time");
5231 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5233 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5236 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5239 *(double *)ptr
= vtop
->c
.d
;
5242 *(long double *)ptr
= vtop
->c
.ld
;
5245 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
5248 if (vtop
->r
& VT_SYM
) {
5249 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5251 *(addr_t
*)ptr
|= (vtop
->c
.ptr_offset
& bit_mask
) << bit_pos
;
5254 if (vtop
->r
& VT_SYM
) {
5255 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5257 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5262 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5269 /* put zeros for variable based init */
5270 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5273 /* nothing to do because globals are already set to zero */
5275 vpush_global_sym(&func_old_type
, TOK_memset
);
5277 #ifdef TCC_TARGET_ARM
5288 /* 't' contains the type and storage info. 'c' is the offset of the
5289 object in section 'sec'. If 'sec' is NULL, it means stack based
5290 allocation. 'first' is true if array '{' must be read (multi
5291 dimension implicit array init handling). 'size_only' is true if
5292 size only evaluation is wanted (only for arrays). */
5293 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5294 int first
, int size_only
)
5296 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5297 int size1
, align1
, expr_type
;
5303 if (type
->t
& VT_VLA
) {
5306 /* save current stack pointer */
5307 if (vla_flags
& VLA_NEED_NEW_FRAME
) {
5309 vla_flags
= VLA_IN_SCOPE
;
5310 vla_sp_loc
= &vla_sp_loc_tmp
;
5313 vla_runtime_type_size(type
, &a
);
5314 gen_vla_alloc(type
, a
);
5315 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5319 } else if (type
->t
& VT_ARRAY
) {
5323 t1
= pointed_type(type
);
5324 size1
= type_size(t1
, &align1
);
5327 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5330 tcc_error("character array initializer must be a literal,"
5331 " optionally enclosed in braces");
5336 /* only parse strings here if correct type (otherwise: handle
5337 them as ((w)char *) expressions */
5338 if ((tok
== TOK_LSTR
&&
5339 #ifdef TCC_TARGET_PE
5340 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5342 (t1
->t
& VT_BTYPE
) == VT_INT
5344 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5345 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5350 /* compute maximum number of chars wanted */
5352 cstr_len
= cstr
->size
;
5354 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5357 if (n
>= 0 && nb
> (n
- array_length
))
5358 nb
= n
- array_length
;
5361 tcc_warning("initializer-string for array is too long");
5362 /* in order to go faster for common case (char
5363 string in global variable, we handle it
5365 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5366 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5370 ch
= ((unsigned char *)cstr
->data
)[i
];
5372 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5373 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5381 /* only add trailing zero if enough storage (no
5382 warning in this case since it is standard) */
5383 if (n
< 0 || array_length
< n
) {
5385 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5391 while (tok
!= '}') {
5392 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5393 /* must put zero in holes (note that doing it that way
5394 ensures that it even works with designators) */
5395 if (!is_putz
&& array_length
< index
)
5398 if (index
> array_length
)
5399 array_length
= index
;
5400 /* special test for multi dimensional arrays (may not
5401 be strictly correct if designators are used at the
5403 if (index
>= n
&& no_oblock
)
5412 /* put zeros at the end */
5413 if (!is_putz
&& n
>= 0 && array_length
< n
)
5415 /* patch type size if needed */
5417 s
->c
= array_length
;
5418 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5419 (sec
|| !first
|| tok
== '{')) {
5422 /* NOTE: the previous test is a specific case for automatic
5423 struct/union init */
5424 /* XXX: union needs only one init */
5426 /* XXX: this test is incorrect for local initializers
5427 beginning with ( without {. It would be much more difficult
5428 to do it correctly (ideally, the expression parser should
5429 be used in all cases) */
5435 while (tok
== '(') {
5439 if (!parse_btype(&type1
, &ad1
))
5441 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5443 if (!is_assignable_types(type
, &type1
))
5444 tcc_error("invalid type for cast");
5449 if (first
|| tok
== '{') {
5458 while (tok
!= '}') {
5459 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5462 if (!is_putz
&& array_length
< index
)
5464 index
= index
+ type_size(&f
->type
, &align1
);
5465 if (index
> array_length
)
5466 array_length
= index
;
5468 /* gr: skip fields from same union - ugly. */
5470 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5471 /* test for same offset */
5472 if (f
->next
->c
!= f
->c
)
5474 /* if yes, test for bitfield shift */
5475 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5476 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5477 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5478 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5479 if (bit_pos_1
!= bit_pos_2
)
5486 if (no_oblock
&& f
== NULL
)
5495 /* put zeros at the end */
5496 if (!is_putz
&& array_length
< n
)
5502 } else if (tok
== '{') {
5504 decl_initializer(type
, sec
, c
, first
, size_only
);
5506 } else if (size_only
) {
5508 /* just skip expression */
5509 parlevel
= parlevel1
= 0;
5510 while ((parlevel
> 0 || parlevel1
> 0 ||
5511 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5514 else if (tok
== ')')
5516 else if (tok
== '{')
5518 else if (tok
== '}')
5523 /* currently, we always use constant expression for globals
5524 (may change for scripting case) */
5525 expr_type
= EXPR_CONST
;
5527 expr_type
= EXPR_ANY
;
5528 init_putv(type
, sec
, c
, 0, expr_type
);
5532 /* parse an initializer for type 't' if 'has_init' is non zero, and
5533 allocate space in local or global data space ('r' is either
5534 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5535 variable 'v' with an associated name represented by 'asm_label' of
5536 scope 'scope' is declared before initializers are parsed. If 'v' is
5537 zero, then a reference to the new object is put in the value stack.
5538 If 'has_init' is 2, a special parsing is done to handle string
5540 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5541 int has_init
, int v
, char *asm_label
,
5544 int size
, align
, addr
, data_offset
;
5546 ParseState saved_parse_state
= {0};
5547 TokenString init_str
;
5549 Sym
*flexible_array
;
5551 flexible_array
= NULL
;
5553 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5554 Sym
*field
= type
->ref
->next
;
5557 field
= field
->next
;
5558 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5559 flexible_array
= field
;
5563 size
= type_size(type
, &align
);
5564 /* If unknown size, we must evaluate it before
5565 evaluating initializers because
5566 initializers can generate global data too
5567 (e.g. string pointers or ISOC99 compound
5568 literals). It also simplifies local
5569 initializers handling */
5570 tok_str_new(&init_str
);
5571 if (size
< 0 || ((((type
->t
& VT_BTYPE
) == VT_STRUCT
) || (type
->t
& VT_ARRAY
)) &&
5572 has_init
&& (tok
< TOK_IDENT
))){
5574 tcc_error("unknown type size");
5575 /* get all init string */
5576 if (has_init
== 2) {
5577 /* only get strings */
5578 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5579 tok_str_add_tok(&init_str
);
5584 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5586 tcc_error("unexpected end of file in initializer");
5587 tok_str_add_tok(&init_str
);
5590 else if (tok
== '}') {
5600 tok_str_add(&init_str
, -1);
5601 tok_str_add(&init_str
, 0);
5604 save_parse_state(&saved_parse_state
);
5606 macro_ptr
= init_str
.str
;
5608 decl_initializer(type
, NULL
, 0, 1, 1);
5609 /* prepare second initializer parsing */
5610 macro_ptr
= init_str
.str
;
5613 /* if still unknown size, error */
5614 size
= type_size(type
, &align
);
5616 tcc_error("unknown type size");
5619 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5620 /* take into account specified alignment if bigger */
5621 if (ad
->a
.aligned
) {
5622 if (ad
->a
.aligned
> align
)
5623 align
= ad
->a
.aligned
;
5624 } else if (ad
->a
.packed
) {
5627 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5629 #ifdef CONFIG_TCC_BCHECK
5630 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5634 loc
= (loc
- size
) & -align
;
5636 #ifdef CONFIG_TCC_BCHECK
5637 /* handles bounds */
5638 /* XXX: currently, since we do only one pass, we cannot track
5639 '&' operators, so we add only arrays */
5640 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5641 unsigned long *bounds_ptr
;
5642 /* add padding between regions */
5644 /* then add local bound info */
5645 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5646 bounds_ptr
[0] = addr
;
5647 bounds_ptr
[1] = size
;
5651 /* local variable */
5652 sym_push(v
, type
, r
, addr
);
5654 /* push local reference */
5655 vset(type
, r
, addr
);
5661 if (v
&& scope
== VT_CONST
) {
5662 /* see if the symbol was already defined */
5665 if (!is_compatible_types(&sym
->type
, type
))
5666 tcc_error("incompatible types for redefinition of '%s'",
5667 get_tok_str(v
, NULL
));
5668 if (sym
->type
.t
& VT_EXTERN
) {
5669 /* if the variable is extern, it was not allocated */
5670 sym
->type
.t
&= ~VT_EXTERN
;
5671 /* set array size if it was omitted in extern
5673 if ((sym
->type
.t
& VT_ARRAY
) &&
5674 sym
->type
.ref
->c
< 0 &&
5676 sym
->type
.ref
->c
= type
->ref
->c
;
5678 /* we accept several definitions of the same
5679 global variable. this is tricky, because we
5680 must play with the SHN_COMMON type of the symbol */
5681 /* XXX: should check if the variable was already
5682 initialized. It is incorrect to initialized it
5684 /* no init data, we won't add more to the symbol */
5691 /* allocate symbol in corresponding section */
5696 else if (tcc_state
->nocommon
)
5700 data_offset
= sec
->data_offset
;
5701 data_offset
= (data_offset
+ align
- 1) & -align
;
5703 /* very important to increment global pointer at this time
5704 because initializers themselves can create new initializers */
5705 data_offset
+= size
;
5706 #ifdef CONFIG_TCC_BCHECK
5707 /* add padding if bound check */
5708 if (tcc_state
->do_bounds_check
)
5711 sec
->data_offset
= data_offset
;
5712 /* allocate section space to put the data */
5713 if (sec
->sh_type
!= SHT_NOBITS
&&
5714 data_offset
> sec
->data_allocated
)
5715 section_realloc(sec
, data_offset
);
5716 /* align section if needed */
5717 if (align
> sec
->sh_addralign
)
5718 sec
->sh_addralign
= align
;
5720 addr
= 0; /* avoid warning */
5724 if (scope
!= VT_CONST
|| !sym
) {
5725 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5726 sym
->asm_label
= asm_label
;
5728 /* update symbol definition */
5730 put_extern_sym(sym
, sec
, addr
, size
);
5733 /* put a common area */
5734 put_extern_sym(sym
, NULL
, align
, size
);
5735 /* XXX: find a nicer way */
5736 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5737 esym
->st_shndx
= SHN_COMMON
;
5740 /* push global reference */
5741 sym
= get_sym_ref(type
, sec
, addr
, size
);
5742 vpushsym(type
, sym
);
5744 /* patch symbol weakness */
5745 if (type
->t
& VT_WEAK
)
5747 apply_visibility(sym
, type
);
5748 #ifdef CONFIG_TCC_BCHECK
5749 /* handles bounds now because the symbol must be defined
5750 before for the relocation */
5751 if (tcc_state
->do_bounds_check
) {
5752 unsigned long *bounds_ptr
;
5754 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5755 /* then add global bound info */
5756 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5757 bounds_ptr
[0] = 0; /* relocated */
5758 bounds_ptr
[1] = size
;
5762 if (has_init
|| (type
->t
& VT_VLA
)) {
5764 init_putz(type
, sec
, addr
, size
);
5765 decl_initializer(type
, sec
, addr
, 1, 0);
5766 /* restore parse state if needed */
5768 tok_str_free(init_str
.str
);
5769 restore_parse_state(&saved_parse_state
);
5771 /* patch flexible array member size back to -1, */
5772 /* for possible subsequent similar declarations */
5774 flexible_array
->type
.ref
->c
= -1;
5779 static void put_func_debug(Sym
*sym
)
5784 /* XXX: we put here a dummy type */
5785 snprintf(buf
, sizeof(buf
), "%s:%c1",
5786 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5787 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5788 cur_text_section
, sym
->c
);
5789 /* //gr gdb wants a line at the function */
5790 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5795 /* parse an old style function declaration list */
5796 /* XXX: check multiple parameter */
5797 static void func_decl_list(Sym
*func_sym
)
5804 /* parse each declaration */
5805 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5806 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5807 if (!parse_btype(&btype
, &ad
))
5808 expect("declaration list");
5809 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5810 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5812 /* we accept no variable after */
5816 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5817 /* find parameter in function parameter list */
5820 if ((s
->v
& ~SYM_FIELD
) == v
)
5824 tcc_error("declaration for parameter '%s' but no such parameter",
5825 get_tok_str(v
, NULL
));
5827 /* check that no storage specifier except 'register' was given */
5828 if (type
.t
& VT_STORAGE
)
5829 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5830 convert_parameter_type(&type
);
5831 /* we can add the type (NOTE: it could be local to the function) */
5833 /* accept other parameters */
5844 /* parse a function defined by symbol 'sym' and generate its code in
5845 'cur_text_section' */
5846 static void gen_function(Sym
*sym
)
5848 int saved_nocode_wanted
= nocode_wanted
;
5850 ind
= cur_text_section
->data_offset
;
5851 /* NOTE: we patch the symbol size later */
5852 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5853 funcname
= get_tok_str(sym
->v
, NULL
);
5855 /* Initialize VLA state */
5856 vla_sp_loc
= &vla_sp_root_loc
;
5857 vla_flags
= VLA_NEED_NEW_FRAME
;
5858 /* put debug symbol */
5859 if (tcc_state
->do_debug
)
5860 put_func_debug(sym
);
5861 /* push a dummy symbol to enable local sym storage */
5862 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5863 gfunc_prolog(&sym
->type
);
5864 #ifdef CONFIG_TCC_BCHECK
5865 if (tcc_state
->do_bounds_check
5866 && !strcmp(get_tok_str(sym
->v
, NULL
), "main")) {
5870 for (i
= 0, sym
= local_stack
; i
< 2; i
++, sym
= sym
->prev
) {
5871 if (sym
->v
& SYM_FIELD
|| sym
->prev
->v
& SYM_FIELD
)
5873 vpush_global_sym(&func_old_type
, TOK___bound_main_arg
);
5874 vset(&sym
->type
, sym
->r
, sym
->c
);
5880 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5883 cur_text_section
->data_offset
= ind
;
5884 label_pop(&global_label_stack
, NULL
);
5885 /* reset local stack */
5886 scope_stack_bottom
= NULL
;
5887 sym_pop(&local_stack
, NULL
);
5888 /* end of function */
5889 /* patch symbol size */
5890 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5892 /* patch symbol weakness (this definition overrules any prototype) */
5893 if (sym
->type
.t
& VT_WEAK
)
5895 apply_visibility(sym
, &sym
->type
);
5896 if (tcc_state
->do_debug
) {
5897 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5899 /* It's better to crash than to generate wrong code */
5900 cur_text_section
= NULL
;
5901 funcname
= ""; /* for safety */
5902 func_vt
.t
= VT_VOID
; /* for safety */
5903 func_var
= 0; /* for safety */
5904 ind
= 0; /* for safety */
5905 nocode_wanted
= saved_nocode_wanted
;
5908 ST_FUNC
void gen_inline_functions(void)
5911 int *str
, inline_generated
, i
;
5912 struct InlineFunc
*fn
;
5914 /* iterate while inline function are referenced */
5916 inline_generated
= 0;
5917 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5918 fn
= tcc_state
->inline_fns
[i
];
5920 if (sym
&& sym
->c
) {
5921 /* the function was used: generate its code and
5922 convert it to a normal function */
5923 str
= fn
->token_str
;
5926 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5927 sym
->r
= VT_SYM
| VT_CONST
;
5928 sym
->type
.t
&= ~VT_INLINE
;
5932 cur_text_section
= text_section
;
5934 macro_ptr
= NULL
; /* fail safe */
5936 inline_generated
= 1;
5939 if (!inline_generated
)
5942 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5943 fn
= tcc_state
->inline_fns
[i
];
5944 str
= fn
->token_str
;
5947 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5950 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5951 static int decl0(int l
, int is_for_loop_init
)
5959 if (!parse_btype(&btype
, &ad
)) {
5960 if (is_for_loop_init
)
5962 /* skip redundant ';' */
5963 /* XXX: find more elegant solution */
5968 if (l
== VT_CONST
&&
5969 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5970 /* global asm block */
5974 /* special test for old K&R protos without explicit int
5975 type. Only accepted when defining global data */
5976 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5980 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5981 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5983 /* we accept no variable after */
5987 while (1) { /* iterate thru each declaration */
5988 char *asm_label
; // associated asm label
5990 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5994 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5995 printf("type = '%s'\n", buf
);
5998 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5999 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
6000 tcc_error("function without file scope cannot be static");
6002 /* if old style function prototype, we accept a
6005 if (sym
->c
== FUNC_OLD
)
6006 func_decl_list(sym
);
6010 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6013 asm_label_instr(&astr
);
6014 asm_label
= tcc_strdup(astr
.data
);
6017 /* parse one last attribute list, after asm label */
6018 parse_attribute(&ad
);
6023 #ifdef TCC_TARGET_PE
6024 if (ad
.a
.func_import
)
6025 type
.t
|= VT_IMPORT
;
6026 if (ad
.a
.func_export
)
6027 type
.t
|= VT_EXPORT
;
6029 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6033 tcc_error("cannot use local functions");
6034 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6035 expect("function definition");
6037 /* reject abstract declarators in function definition */
6039 while ((sym
= sym
->next
) != NULL
)
6040 if (!(sym
->v
& ~SYM_FIELD
))
6041 expect("identifier");
6043 /* XXX: cannot do better now: convert extern line to static inline */
6044 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6045 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6050 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6053 ref
= sym
->type
.ref
;
6054 if (0 == ref
->a
.func_proto
)
6055 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6057 /* use func_call from prototype if not defined */
6058 if (ref
->a
.func_call
!= FUNC_CDECL
6059 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6060 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6062 /* use export from prototype */
6063 if (ref
->a
.func_export
)
6064 type
.ref
->a
.func_export
= 1;
6066 /* use static from prototype */
6067 if (sym
->type
.t
& VT_STATIC
)
6068 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6070 /* If the definition has no visibility use the
6071 one from prototype. */
6072 if (! (type
.t
& VT_VIS_MASK
))
6073 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6075 if (!is_compatible_types(&sym
->type
, &type
)) {
6077 tcc_error("incompatible types for redefinition of '%s'",
6078 get_tok_str(v
, NULL
));
6080 type
.ref
->a
.func_proto
= 0;
6081 /* if symbol is already defined, then put complete type */
6084 /* put function symbol */
6085 sym
= global_identifier_push(v
, type
.t
, 0);
6086 sym
->type
.ref
= type
.ref
;
6089 /* static inline functions are just recorded as a kind
6090 of macro. Their code will be emitted at the end of
6091 the compilation unit only if they are used */
6092 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6093 (VT_INLINE
| VT_STATIC
)) {
6094 TokenString func_str
;
6096 struct InlineFunc
*fn
;
6097 const char *filename
;
6099 tok_str_new(&func_str
);
6105 tcc_error("unexpected end of file");
6106 tok_str_add_tok(&func_str
);
6111 } else if (t
== '}') {
6113 if (block_level
== 0)
6117 tok_str_add(&func_str
, -1);
6118 tok_str_add(&func_str
, 0);
6119 filename
= file
? file
->filename
: "";
6120 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6121 strcpy(fn
->filename
, filename
);
6123 fn
->token_str
= func_str
.str
;
6124 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6127 /* compute text section */
6128 cur_text_section
= ad
.section
;
6129 if (!cur_text_section
)
6130 cur_text_section
= text_section
;
6131 sym
->r
= VT_SYM
| VT_CONST
;
6136 if (btype
.t
& VT_TYPEDEF
) {
6137 /* save typedefed type */
6138 /* XXX: test storage specifiers ? */
6139 sym
= sym_push(v
, &type
, 0, 0);
6141 sym
->type
.t
|= VT_TYPEDEF
;
6144 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6145 /* external function definition */
6146 /* specific case for func_call attribute */
6147 ad
.a
.func_proto
= 1;
6149 } else if (!(type
.t
& VT_ARRAY
)) {
6150 /* not lvalue if array */
6151 r
|= lvalue_type(type
.t
);
6153 has_init
= (tok
== '=');
6154 if (has_init
&& (type
.t
& VT_VLA
))
6155 tcc_error("Variable length array cannot be initialized");
6156 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6157 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6158 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6159 /* external variable or function */
6160 /* NOTE: as GCC, uninitialized global static
6161 arrays of null size are considered as
6163 sym
= external_sym(v
, &type
, r
, asm_label
);
6165 if (ad
.alias_target
) {
6170 alias_target
= sym_find(ad
.alias_target
);
6171 if (!alias_target
|| !alias_target
->c
)
6172 tcc_error("unsupported forward __alias__ attribute");
6173 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6174 tsec
.sh_num
= esym
->st_shndx
;
6175 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6178 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6179 if (type
.t
& VT_STATIC
)
6185 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
6189 if (is_for_loop_init
)
6202 ST_FUNC
void decl(int l
)