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
, ex_rc
;
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
;
73 ST_DATA
int pop_stack
;
75 ST_DATA CType char_pointer_type
, func_old_type
, int_type
, size_type
;
77 /* ------------------------------------------------------------------------- */
78 static void gen_cast(CType
*type
);
79 static inline CType
*pointed_type(CType
*type
);
80 static int is_compatible_types(CType
*type1
, CType
*type2
);
81 static int parse_btype(CType
*type
, AttributeDef
*ad
);
82 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
83 static void parse_expr_type(CType
*type
);
84 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
85 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
, int case_reg
, int is_expr
);
86 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, char *asm_label
, int scope
);
87 static int decl0(int l
, int is_for_loop_init
);
88 static void expr_eq(void);
89 static void unary_type(CType
*type
);
90 static void vla_runtime_type_size(CType
*type
, int *a
);
91 static void vla_sp_save(void);
92 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
93 static void expr_type(CType
*type
);
94 ST_FUNC
void vpush64(int ty
, unsigned long long v
);
95 ST_FUNC
void vpush(CType
*type
);
96 ST_FUNC
int gtst(int inv
, int t
);
97 ST_FUNC
int is_btype_size(int bt
);
99 ST_INLN
int is_float(int t
)
103 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
|| bt
== VT_QFLOAT
;
106 /* we use our own 'finite' function to avoid potential problems with
107 non standard math libs */
108 /* XXX: endianness dependent */
109 ST_FUNC
int ieee_finite(double d
)
112 memcpy(p
, &d
, sizeof(double));
113 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
116 ST_FUNC
void test_lvalue(void)
118 if (!(vtop
->r
& VT_LVAL
))
122 /* ------------------------------------------------------------------------- */
123 /* symbol allocator */
124 static Sym
*__sym_malloc(void)
126 Sym
*sym_pool
, *sym
, *last_sym
;
129 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
130 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
132 last_sym
= sym_free_first
;
134 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
135 sym
->next
= last_sym
;
139 sym_free_first
= last_sym
;
143 static inline Sym
*sym_malloc(void)
146 sym
= sym_free_first
;
148 sym
= __sym_malloc();
149 sym_free_first
= sym
->next
;
153 ST_INLN
void sym_free(Sym
*sym
)
155 sym
->next
= sym_free_first
;
156 tcc_free(sym
->asm_label
);
157 sym_free_first
= sym
;
160 /* push, without hashing */
161 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
164 if (ps
== &local_stack
) {
165 for (s
= *ps
; s
&& s
!= scope_stack_bottom
; s
= s
->prev
)
166 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
&& s
->v
== v
)
167 tcc_error("incompatible types for redefinition of '%s'",
168 get_tok_str(v
, NULL
));
186 /* find a symbol and return its associated structure. 's' is the top
187 of the symbol stack */
188 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
200 /* structure lookup */
201 ST_INLN Sym
*struct_find(int v
)
204 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
206 return table_ident
[v
]->sym_struct
;
209 /* find an identifier */
210 ST_INLN Sym
*sym_find(int v
)
213 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
215 return table_ident
[v
]->sym_identifier
;
218 /* push a given symbol on the symbol stack */
219 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
228 s
= sym_push2(ps
, v
, type
->t
, c
);
229 s
->type
.ref
= type
->ref
;
231 /* don't record fields or anonymous symbols */
233 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
234 /* record symbol in token array */
235 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
237 ps
= &ts
->sym_struct
;
239 ps
= &ts
->sym_identifier
;
246 /* push a global identifier */
247 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
250 s
= sym_push2(&global_stack
, v
, t
, c
);
251 /* don't record anonymous symbol */
252 if (v
< SYM_FIRST_ANOM
) {
253 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
254 /* modify the top most local identifier, so that
255 sym_identifier will point to 's' when popped */
257 ps
= &(*ps
)->prev_tok
;
264 /* pop symbols until top reaches 'b' */
265 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
275 /* remove symbol in token array */
277 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
278 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
280 ps
= &ts
->sym_struct
;
282 ps
= &ts
->sym_identifier
;
291 static void weaken_symbol(Sym
*sym
)
293 sym
->type
.t
|= VT_WEAK
;
298 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
299 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
300 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
304 static void apply_visibility(Sym
*sym
, CType
*type
)
306 int vis
= sym
->type
.t
& VT_VIS_MASK
;
307 int vis2
= type
->t
& VT_VIS_MASK
;
308 if (vis
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
310 else if (vis2
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
313 vis
= (vis
< vis2
) ? vis
: vis2
;
314 sym
->type
.t
&= ~VT_VIS_MASK
;
320 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
321 vis
>>= VT_VIS_SHIFT
;
322 esym
->st_other
= (esym
->st_other
& ~ELFW(ST_VISIBILITY
)(-1)) | vis
;
326 /* ------------------------------------------------------------------------- */
328 ST_FUNC
void swap(int *p
, int *q
)
336 static void vsetc(CType
*type
, int r
, CValue
*vc
)
340 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
341 tcc_error("memory full (vstack)");
342 /* cannot let cpu flags if other instruction are generated. Also
343 avoid leaving VT_JMP anywhere except on the top of the stack
344 because it would complicate the code generator. */
345 if (vtop
>= vstack
) {
346 v
= vtop
->r
& VT_VALMASK
;
347 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
357 /* push constant of type "type" with useless value */
358 ST_FUNC
void vpush(CType
*type
)
361 vsetc(type
, VT_CONST
, &cval
);
364 /* push integer constant */
365 ST_FUNC
void vpushi(int v
)
369 vsetc(&int_type
, VT_CONST
, &cval
);
372 /* push a pointer sized constant */
373 static void vpushs(addr_t v
)
377 vsetc(&size_type
, VT_CONST
, &cval
);
380 /* push arbitrary 64bit constant */
381 ST_FUNC
void vpush64(int ty
, unsigned long long v
)
388 vsetc(&ctype
, VT_CONST
, &cval
);
391 /* push long long constant */
392 static inline void vpushll(long long v
)
394 vpush64(VT_LLONG
, v
);
397 /* push a symbol value of TYPE */
398 static inline void vpushsym(CType
*type
, Sym
*sym
)
402 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
406 /* Return a static symbol pointing to a section */
407 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
413 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
414 sym
->type
.ref
= type
->ref
;
415 sym
->r
= VT_CONST
| VT_SYM
;
416 put_extern_sym(sym
, sec
, offset
, size
);
420 /* push a reference to a section offset by adding a dummy symbol */
421 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
423 vpushsym(type
, get_sym_ref(type
, sec
, offset
, size
));
426 /* define a new external reference to a symbol 'v' of type 'u' */
427 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
433 /* push forward reference */
434 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
435 s
->type
.ref
= type
->ref
;
436 s
->r
= r
| VT_CONST
| VT_SYM
;
441 /* define a new external reference to a symbol 'v' with alternate asm
442 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
443 is no alternate name (most cases) */
444 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
450 /* push forward reference */
451 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
452 s
->asm_label
= asm_label
;
453 s
->type
.t
|= VT_EXTERN
;
454 } else if (s
->type
.ref
== func_old_type
.ref
) {
455 s
->type
.ref
= type
->ref
;
456 s
->r
= r
| VT_CONST
| VT_SYM
;
457 s
->type
.t
|= VT_EXTERN
;
458 } else if (!is_compatible_types(&s
->type
, type
)) {
459 tcc_error("incompatible types for redefinition of '%s'",
460 get_tok_str(v
, NULL
));
462 /* Merge some storage attributes. */
463 if (type
->t
& VT_WEAK
)
466 if (type
->t
& VT_VIS_MASK
)
467 apply_visibility(s
, type
);
472 /* push a reference to global symbol v */
473 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
475 vpushsym(type
, external_global_sym(v
, type
, 0));
478 ST_FUNC
void vset(CType
*type
, int r
, int v
)
483 vsetc(type
, r
, &cval
);
486 static void vseti(int r
, int v
)
494 ST_FUNC
void vswap(void)
497 /* cannot let cpu flags if other instruction are generated. Also
498 avoid leaving VT_JMP anywhere except on the top of the stack
499 because it would complicate the code generator. */
500 if (vtop
>= vstack
) {
501 int v
= vtop
->r
& VT_VALMASK
;
502 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
509 /* XXX: +2% overall speed possible with optimized memswap
511 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
515 ST_FUNC
void vpushv(SValue
*v
)
517 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
518 tcc_error("memory full (vstack)");
523 static void vdup(void)
528 /* save r to the memory stack, and mark it as being free */
529 ST_FUNC
void save_reg(int r
)
531 int l
, saved
, size
, align
;
535 /* modify all stack values */
538 for(p
=vstack
;p
<=vtop
;p
++) {
539 if ((p
->r
& VT_VALMASK
) == r
||
540 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
541 /* must save value on stack if not already done */
543 /* NOTE: must reload 'r' because r might be equal to r2 */
544 r
= p
->r
& VT_VALMASK
;
545 /* store register in the stack */
547 if ((p
->r
& VT_LVAL
) ||
548 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
549 #ifdef TCC_TARGET_X86_64
550 type
= &char_pointer_type
;
554 size
= type_size(type
, &align
);
555 loc
= (loc
- size
) & -align
;
557 sv
.r
= VT_LOCAL
| VT_LVAL
;
560 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
561 /* x86 specific: need to pop fp register ST0 if saved */
563 o(0xd8dd); /* fstp %st(0) */
566 #ifndef TCC_TARGET_X86_64
567 /* special long long case */
568 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
576 /* mark that stack entry as being saved on the stack */
577 if (p
->r
& VT_LVAL
) {
578 /* also clear the bounded flag because the
579 relocation address of the function was stored in
581 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
583 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
591 #ifdef TCC_TARGET_ARM
592 /* find a register of class 'rc2' with at most one reference on stack.
593 * If none, call get_reg(rc) */
594 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
599 for(r
=0;r
<NB_REGS
;r
++) {
600 if (reg_classes
[r
] & rc2
) {
603 for(p
= vstack
; p
<= vtop
; p
++) {
604 if ((p
->r
& VT_VALMASK
) == r
||
605 (p
->r2
& VT_VALMASK
) == r
)
616 /* find a free register of class 'rc'. If none, save one register */
617 ST_FUNC
int get_reg(int rc
)
622 /* find a free register */
623 for(r
=0;r
<NB_REGS
;r
++) {
624 if (reg_classes
[r
] & rc
) {
625 for(p
=vstack
;p
<=vtop
;p
++) {
626 if ((p
->r
& VT_VALMASK
) == r
||
627 (p
->r2
& VT_VALMASK
) == r
)
635 /* no register left : free the first one on the stack (VERY
636 IMPORTANT to start from the bottom to ensure that we don't
637 spill registers used in gen_opi()) */
638 for(p
=vstack
;p
<=vtop
;p
++) {
639 /* look at second register (if long long) */
640 r
= p
->r2
& VT_VALMASK
;
641 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
643 r
= p
->r
& VT_VALMASK
;
644 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
650 /* Should never comes here */
654 /* save registers up to (vtop - n) stack entry */
655 ST_FUNC
void save_regs(int n
)
660 for(p
= vstack
;p
<= p1
; p
++) {
661 r
= p
->r
& VT_VALMASK
;
668 /* move register 's' (of type 't') to 'r', and flush previous value of r to memory
670 static void move_reg(int r
, int s
, int t
)
684 /* get address of vtop (vtop MUST BE an lvalue) */
685 static void gaddrof(void)
687 if (vtop
->r
& VT_REF
)
690 /* tricky: if saved lvalue, then we can go back to lvalue */
691 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
692 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
697 #ifdef CONFIG_TCC_BCHECK
698 /* generate lvalue bound code */
699 static void gbound(void)
704 vtop
->r
&= ~VT_MUSTBOUND
;
705 /* if lvalue, then use checking code before dereferencing */
706 if (vtop
->r
& VT_LVAL
) {
707 /* if not VT_BOUNDED value, then make one */
708 if (!(vtop
->r
& VT_BOUNDED
)) {
709 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
710 /* must save type because we must set it to int to get pointer */
712 vtop
->type
.t
= VT_INT
;
715 gen_bounded_ptr_add();
716 vtop
->r
|= lval_type
;
719 /* then check for dereferencing */
720 gen_bounded_ptr_deref();
725 /* store vtop a register belonging to class 'rc'. lvalues are
726 converted to values. Cannot be used if cannot be converted to
727 register value (such as structures). */
728 ST_FUNC
int gv(int rc
)
730 int r
, bit_pos
, bit_size
, size
, align
, i
, ft
, sbt
;
735 /* NOTE: get_reg can modify vstack[] */
736 if (ft
& VT_BITFIELD
) {
739 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
740 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
741 /* remove bit field info to avoid loops */
742 ft
= vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
743 /* cast to int to propagate signedness in following ops */
744 if (sbt
== VT_LLONG
) {
751 if((ft
& VT_UNSIGNED
) || sbt
== VT_BOOL
)
752 type
.t
|= VT_UNSIGNED
;
754 /* generate shifts */
755 vpushi(bits
- (bit_pos
+ bit_size
));
757 vpushi(bits
- bit_size
);
758 /* NOTE: transformed to SHR if unsigned */
762 if (is_float(vtop
->type
.t
) &&
763 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
766 unsigned long offset
;
767 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
771 /* XXX: unify with initializers handling ? */
772 /* CPUs usually cannot use float constants, so we store them
773 generically in data segment */
774 size
= type_size(&vtop
->type
, &align
);
775 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
776 data_section
->data_offset
= offset
;
777 /* XXX: not portable yet */
778 #if defined(__i386__) || defined(__x86_64__)
779 /* Zero pad x87 tenbyte long doubles */
780 if (size
== LDOUBLE_SIZE
) {
781 vtop
->c
.tab
[2] &= 0xffff;
782 #if LDOUBLE_SIZE == 16
787 ptr
= section_ptr_add(data_section
, size
);
789 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
793 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
797 ptr
[i
] = vtop
->c
.tab
[i
];
798 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
799 vtop
->r
|= VT_LVAL
| VT_SYM
;
801 vtop
->c
.ptr_offset
= 0;
803 #ifdef CONFIG_TCC_BCHECK
804 if (vtop
->r
& VT_MUSTBOUND
)
808 r
= vtop
->r
& VT_VALMASK
;
809 if((rc
& ~RC_MASK
) && (rc
!= RC_ST0
))
812 rc2
= (rc
& RC_FLOAT
) ? RC_FLOAT
: RC_INT
;
814 /* need to reload if:
816 - lvalue (need to dereference pointer)
817 - already a register, but not in the right class */
818 if (r
>= VT_CONST
|| (vtop
->r
& VT_LVAL
) || !(reg_classes
[r
] & rc
)
819 #ifdef TCC_TARGET_X86_64
820 || (sbt
== VT_QLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
821 || (sbt
== VT_QFLOAT
&& !(reg_classes
[vtop
->r2
] & rc2
))
823 || (sbt
== VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
828 #ifdef TCC_TARGET_X86_64
829 if ((sbt
== VT_QLONG
) || (sbt
== VT_QFLOAT
))
834 #ifdef TCC_TARGET_X86_64
835 int load_size
= 8, load_type
= (sbt
== VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
837 int load_size
= 4, load_type
= VT_INT
;
838 unsigned long long ll
;
841 /* two register type load : expand to two words
843 #ifndef TCC_TARGET_X86_64
844 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
847 vtop
->c
.ui
= ll
; /* first word */
849 vtop
->r
= r
; /* save register value */
850 vpushi(ll
>> 32); /* second word */
853 /* XXX: test to VT_CONST incorrect ? */
854 if (r
>= VT_CONST
|| (vtop
->r
& VT_LVAL
)) {
855 /* We do not want to modifier the long long
856 pointer here, so the safest (and less
857 efficient) is to save all the other registers
858 in the regs. use VT_TMP XXX: totally inefficient. */
859 /* load from memory */
860 vtop
->type
.t
= load_type
;
863 vtop
[-1].r
= r
| VT_TMP
; /* lock register value */
864 /* increment pointer to get second word */
865 vtop
->type
= char_pointer_type
;
870 vtop
->type
.t
= load_type
;
875 vtop
[-1].r
= r
| VT_TMP
; /* lock register value */
876 vtop
->r
= vtop
[-1].r2
;
878 /* Allocate second register. Here we rely on the fact that
879 get_reg() tries first to free r2 of an SValue. */
883 /* write second register */
887 } else if ((vtop
->r
& VT_LVAL
) && !is_float(ft
)) {
889 /* lvalue of scalar type : need to use lvalue type
890 because of possible cast */
892 /* compute memory access type */
893 if (vtop
->r
& VT_REF
)
894 #ifdef TCC_TARGET_X86_64
899 else if (vtop
->r
& VT_LVAL_BYTE
)
901 else if (vtop
->r
& VT_LVAL_SHORT
)
903 if (vtop
->r
& VT_LVAL_UNSIGNED
)
907 /* restore wanted type */
910 /* one register type load */
914 vtop
->c
.ptr_offset
= 0;
916 #ifdef TCC_TARGET_C67
917 /* uses register pairs for doubles */
918 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
925 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
926 ST_FUNC
void gv2(int rc1
, int rc2
)
928 /* generate more generic register first. But VT_JMP or VT_CMP
929 values must be generated first in all cases to avoid possible
936 /* test if reload is needed for first register */
937 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
947 /* test if reload is needed for first register */
948 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
954 /* wrapper around RC_FRET to return a register by type */
955 static int rc_fret(int t
)
957 #ifdef TCC_TARGET_X86_64
958 if (t
== VT_LDOUBLE
) {
966 /* wrapper around REG_FRET to return a register by type */
967 static int reg_fret(int t
)
969 #ifdef TCC_TARGET_X86_64
970 if (t
== VT_LDOUBLE
) {
977 /* expand long long on stack in two int registers */
978 static void lexpand(void)
982 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
985 vtop
[0].r
= vtop
[-1].r2
;
986 vtop
[0].r2
= VT_CONST
;
987 vtop
[-1].r2
= VT_CONST
;
988 vtop
[0].type
.t
= VT_INT
| u
;
989 vtop
[-1].type
.t
= VT_INT
| u
;
992 #ifdef TCC_TARGET_ARM
993 /* expand long long on stack */
994 ST_FUNC
void lexpand_nr(void)
998 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1000 vtop
->r2
= VT_CONST
;
1001 vtop
->type
.t
= VT_INT
| u
;
1002 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
1003 if (v
== VT_CONST
) {
1004 vtop
[-1].c
.ui
= vtop
->c
.ull
;
1005 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
1007 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1009 vtop
->r
= vtop
[-1].r
;
1010 } else if (v
> VT_CONST
) {
1014 vtop
->r
= vtop
[-1].r2
;
1015 vtop
[-1].r2
= VT_CONST
;
1016 vtop
[-1].type
.t
= VT_INT
| u
;
1020 #ifndef TCC_TARGET_X86_64
1021 /* build a long long from two ints */
1022 static void lbuild(int t
)
1024 gv2(RC_INT
, RC_INT
);
1025 vtop
[-1].r2
= vtop
[0].r
;
1026 vtop
[-1].type
.t
= t
;
1031 /* rotate n first stack elements to the bottom
1032 I1 ... In -> I2 ... In I1 [top is right]
1034 ST_FUNC
void vrotb(int n
)
1040 for(i
=-n
+1;i
!=0;i
++)
1041 vtop
[i
] = vtop
[i
+1];
1045 /* rotate the n elements before entry e towards the top
1046 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1048 ST_FUNC
void vrote(SValue
*e
, int n
)
1054 for(i
= 0;i
< n
- 1; i
++)
1059 /* rotate n first stack elements to the top
1060 I1 ... In -> In I1 ... I(n-1) [top is right]
1062 ST_FUNC
void vrott(int n
)
1067 /* pop stack value */
1068 ST_FUNC
void vpop(void)
1071 v
= vtop
->r
& VT_VALMASK
;
1072 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1073 /* for x86, we need to pop the FP stack */
1074 if (v
== TREG_ST0
&& !nocode_wanted
) {
1075 o(0xd8dd); /* fstp %st(0) */
1078 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1079 /* need to put correct jump if && or || without test */
1085 /* convert stack entry to register and duplicate its value in another
1087 static void gv_dup(void)
1092 #ifndef TCC_TARGET_X86_64
1093 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1100 /* stack: H L L1 H1 */
1109 /* duplicate value */
1112 #ifdef TCC_TARGET_X86_64
1113 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1124 load(r1
, &sv
); /* move r to r1 */
1126 /* duplicates value */
1131 #ifndef TCC_TARGET_X86_64
1132 /* generate CPU independent (unsigned) long long operations */
1133 static void gen_opl(int op
)
1135 int t
, a
, b
, op1
, c
, i
;
1137 unsigned short reg_iret
= REG_IRET
;
1138 unsigned short reg_lret
= REG_LRET
;
1144 func
= TOK___divdi3
;
1147 func
= TOK___udivdi3
;
1150 func
= TOK___moddi3
;
1153 func
= TOK___umoddi3
;
1160 /* call generic long long function */
1161 vpush_global_sym(&func_old_type
, func
);
1166 vtop
->r2
= reg_lret
;
1179 /* stack: L1 H1 L2 H2 */
1184 vtop
[-2] = vtop
[-3];
1187 /* stack: H1 H2 L1 L2 */
1193 /* stack: H1 H2 L1 L2 ML MH */
1196 /* stack: ML MH H1 H2 L1 L2 */
1200 /* stack: ML MH H1 L2 H2 L1 */
1205 /* stack: ML MH M1 M2 */
1208 } else if (op
== '+' || op
== '-') {
1209 /* XXX: add non carry method too (for MIPS or alpha) */
1215 /* stack: H1 H2 (L1 op L2) */
1218 gen_op(op1
+ 1); /* TOK_xxxC2 */
1221 /* stack: H1 H2 (L1 op L2) */
1224 /* stack: (L1 op L2) H1 H2 */
1226 /* stack: (L1 op L2) (H1 op H2) */
1234 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1235 t
= vtop
[-1].type
.t
;
1239 /* stack: L H shift */
1241 /* constant: simpler */
1242 /* NOTE: all comments are for SHL. the other cases are
1243 done by swaping words */
1254 if (op
!= TOK_SAR
) {
1287 /* XXX: should provide a faster fallback on x86 ? */
1290 func
= TOK___ashrdi3
;
1293 func
= TOK___lshrdi3
;
1296 func
= TOK___ashldi3
;
1302 /* compare operations */
1308 /* stack: L1 H1 L2 H2 */
1310 vtop
[-1] = vtop
[-2];
1312 /* stack: L1 L2 H1 H2 */
1315 /* when values are equal, we need to compare low words. since
1316 the jump is inverted, we invert the test too. */
1319 else if (op1
== TOK_GT
)
1321 else if (op1
== TOK_ULT
)
1323 else if (op1
== TOK_UGT
)
1328 if (op1
!= TOK_NE
) {
1332 /* generate non equal test */
1333 /* XXX: NOT PORTABLE yet */
1337 #if defined(TCC_TARGET_I386)
1338 b
= psym(0x850f, 0);
1339 #elif defined(TCC_TARGET_ARM)
1341 o(0x1A000000 | encbranch(ind
, 0, 1));
1342 #elif defined(TCC_TARGET_C67)
1343 tcc_error("not implemented");
1345 #error not supported
1349 /* compare low. Always unsigned */
1353 else if (op1
== TOK_LE
)
1355 else if (op1
== TOK_GT
)
1357 else if (op1
== TOK_GE
)
1368 /* handle integer constant optimizations and various machine
1370 static void gen_opic(int op
)
1372 int c1
, c2
, t1
, t2
, n
;
1375 typedef unsigned long long U
;
1379 t1
= v1
->type
.t
& VT_BTYPE
;
1380 t2
= v2
->type
.t
& VT_BTYPE
;
1384 else if (v1
->type
.t
& VT_UNSIGNED
)
1391 else if (v2
->type
.t
& VT_UNSIGNED
)
1396 /* currently, we cannot do computations with forward symbols */
1397 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1398 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1401 case '+': l1
+= l2
; break;
1402 case '-': l1
-= l2
; break;
1403 case '&': l1
&= l2
; break;
1404 case '^': l1
^= l2
; break;
1405 case '|': l1
|= l2
; break;
1406 case '*': l1
*= l2
; break;
1413 /* if division by zero, generate explicit division */
1416 tcc_error("division by zero in constant");
1420 default: l1
/= l2
; break;
1421 case '%': l1
%= l2
; break;
1422 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1423 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1426 case TOK_SHL
: l1
<<= l2
; break;
1427 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1428 case TOK_SAR
: l1
>>= l2
; break;
1430 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1431 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1432 case TOK_EQ
: l1
= l1
== l2
; break;
1433 case TOK_NE
: l1
= l1
!= l2
; break;
1434 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1435 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1436 case TOK_LT
: l1
= l1
< l2
; break;
1437 case TOK_GE
: l1
= l1
>= l2
; break;
1438 case TOK_LE
: l1
= l1
<= l2
; break;
1439 case TOK_GT
: l1
= l1
> l2
; break;
1441 case TOK_LAND
: l1
= l1
&& l2
; break;
1442 case TOK_LOR
: l1
= l1
|| l2
; break;
1449 /* if commutative ops, put c2 as constant */
1450 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1451 op
== '|' || op
== '*')) {
1453 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1454 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1456 /* Filter out NOP operations like x*1, x-0, x&-1... */
1457 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1460 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1461 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1467 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1468 /* try to use shifts instead of muls or divs */
1469 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1478 else if (op
== TOK_PDIV
)
1484 } else if (c2
&& (op
== '+' || op
== '-') &&
1485 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1486 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1487 /* symbol + constant case */
1494 if (!nocode_wanted
) {
1495 /* call low level op generator */
1496 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1507 /* generate a floating point operation with constant propagation */
1508 static void gen_opif(int op
)
1516 /* currently, we cannot do computations with forward symbols */
1517 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1518 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1520 if (v1
->type
.t
== VT_FLOAT
) {
1523 } else if (v1
->type
.t
== VT_DOUBLE
) {
1531 /* NOTE: we only do constant propagation if finite number (not
1532 NaN or infinity) (ANSI spec) */
1533 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1537 case '+': f1
+= f2
; break;
1538 case '-': f1
-= f2
; break;
1539 case '*': f1
*= f2
; break;
1543 tcc_error("division by zero in constant");
1548 /* XXX: also handles tests ? */
1552 /* XXX: overflow test ? */
1553 if (v1
->type
.t
== VT_FLOAT
) {
1555 } else if (v1
->type
.t
== VT_DOUBLE
) {
1563 if (!nocode_wanted
) {
1571 static int pointed_size(CType
*type
)
1574 return type_size(pointed_type(type
), &align
);
1577 static void vla_runtime_pointed_size(CType
*type
)
1580 vla_runtime_type_size(pointed_type(type
), &align
);
1583 static inline int is_null_pointer(SValue
*p
)
1585 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1587 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1588 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0) ||
1589 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&& p
->c
.ptr_offset
== 0);
1592 static inline int is_integer_btype(int bt
)
1594 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1595 bt
== VT_INT
|| bt
== VT_LLONG
);
1598 /* check types for comparison or subtraction of pointers */
1599 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1601 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1604 /* null pointers are accepted for all comparisons as gcc */
1605 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1609 bt1
= type1
->t
& VT_BTYPE
;
1610 bt2
= type2
->t
& VT_BTYPE
;
1611 /* accept comparison between pointer and integer with a warning */
1612 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1613 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1614 tcc_warning("comparison between pointer and integer");
1618 /* both must be pointers or implicit function pointers */
1619 if (bt1
== VT_PTR
) {
1620 type1
= pointed_type(type1
);
1621 } else if (bt1
!= VT_FUNC
)
1622 goto invalid_operands
;
1624 if (bt2
== VT_PTR
) {
1625 type2
= pointed_type(type2
);
1626 } else if (bt2
!= VT_FUNC
) {
1628 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1630 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1631 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1635 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1636 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1637 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1638 /* gcc-like error if '-' is used */
1640 goto invalid_operands
;
1642 tcc_warning("comparison of distinct pointer types lacks a cast");
1646 /* generic gen_op: handles types problems */
1647 ST_FUNC
void gen_op(int op
)
1649 int u
, t1
, t2
, bt1
, bt2
, t
;
1652 t1
= vtop
[-1].type
.t
;
1653 t2
= vtop
[0].type
.t
;
1654 bt1
= t1
& VT_BTYPE
;
1655 bt2
= t2
& VT_BTYPE
;
1657 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1658 /* at least one operand is a pointer */
1659 /* relationnal op: must be both pointers */
1660 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1661 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1662 /* pointers are handled are unsigned */
1663 #ifdef TCC_TARGET_X86_64
1664 t
= VT_LLONG
| VT_UNSIGNED
;
1666 t
= VT_INT
| VT_UNSIGNED
;
1670 /* if both pointers, then it must be the '-' op */
1671 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1673 tcc_error("cannot use pointers here");
1674 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1675 /* XXX: check that types are compatible */
1676 if (vtop
[-1].type
.t
& VT_VLA
) {
1677 vla_runtime_pointed_size(&vtop
[-1].type
);
1679 vpushi(pointed_size(&vtop
[-1].type
));
1683 /* set to integer type */
1684 #ifdef TCC_TARGET_X86_64
1685 vtop
->type
.t
= VT_LLONG
;
1687 vtop
->type
.t
= VT_INT
;
1692 /* exactly one pointer : must be '+' or '-'. */
1693 if (op
!= '-' && op
!= '+')
1694 tcc_error("cannot use pointers here");
1695 /* Put pointer as first operand */
1696 if (bt2
== VT_PTR
) {
1700 type1
= vtop
[-1].type
;
1701 type1
.t
&= ~VT_ARRAY
;
1702 if (vtop
[-1].type
.t
& VT_VLA
)
1703 vla_runtime_pointed_size(&vtop
[-1].type
);
1705 u
= pointed_size(&vtop
[-1].type
);
1707 tcc_error("unknown array element size");
1708 #ifdef TCC_TARGET_X86_64
1711 /* XXX: cast to int ? (long long case) */
1716 #ifdef CONFIG_TCC_BCHECK
1717 /* if evaluating constant expression, no code should be
1718 generated, so no bound check */
1719 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1720 /* if bounded pointers, we generate a special code to
1727 gen_bounded_ptr_add();
1733 /* put again type if gen_opic() swaped operands */
1736 } else if (is_float(bt1
) || is_float(bt2
)) {
1737 /* compute bigger type and do implicit casts */
1738 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1740 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1745 /* floats can only be used for a few operations */
1746 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1747 (op
< TOK_ULT
|| op
> TOK_GT
))
1748 tcc_error("invalid operands for binary operation");
1750 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
1751 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
1752 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
1755 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1756 /* cast to biggest op */
1758 /* convert to unsigned if it does not fit in a long long */
1759 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1760 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1763 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1764 tcc_error("comparison of struct");
1766 /* integer operations */
1768 /* convert to unsigned if it does not fit in an integer */
1769 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1770 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1773 /* XXX: currently, some unsigned operations are explicit, so
1774 we modify them here */
1775 if (t
& VT_UNSIGNED
) {
1782 else if (op
== TOK_LT
)
1784 else if (op
== TOK_GT
)
1786 else if (op
== TOK_LE
)
1788 else if (op
== TOK_GE
)
1795 /* special case for shifts and long long: we keep the shift as
1797 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1804 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1805 /* relationnal op: the result is an int */
1806 vtop
->type
.t
= VT_INT
;
1813 #ifndef TCC_TARGET_ARM
1814 /* generic itof for unsigned long long case */
1815 static void gen_cvt_itof1(int t
)
1817 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1818 (VT_LLONG
| VT_UNSIGNED
)) {
1821 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1822 #if LDOUBLE_SIZE != 8
1823 else if (t
== VT_LDOUBLE
)
1824 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1827 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1831 vtop
->r
= reg_fret(t
);
1838 /* generic ftoi for unsigned long long case */
1839 static void gen_cvt_ftoi1(int t
)
1843 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1844 /* not handled natively */
1845 st
= vtop
->type
.t
& VT_BTYPE
;
1847 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1848 #if LDOUBLE_SIZE != 8
1849 else if (st
== VT_LDOUBLE
)
1850 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1853 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1858 vtop
->r2
= REG_LRET
;
1864 /* force char or short cast */
1865 static void force_charshort_cast(int t
)
1869 /* XXX: add optimization if lvalue : just change type and offset */
1874 if (t
& VT_UNSIGNED
) {
1875 vpushi((1 << bits
) - 1);
1881 /* result must be signed or the SAR is converted to an SHL
1882 This was not the case when "t" was a signed short
1883 and the last value on the stack was an unsigned int */
1884 vtop
->type
.t
&= ~VT_UNSIGNED
;
1890 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1891 static void gen_cast(CType
*type
)
1893 int sbt
, dbt
, sf
, df
, c
, p
;
1895 /* special delayed cast for char/short */
1896 /* XXX: in some cases (multiple cascaded casts), it may still
1898 if (vtop
->r
& VT_MUSTCAST
) {
1899 vtop
->r
&= ~VT_MUSTCAST
;
1900 force_charshort_cast(vtop
->type
.t
);
1903 /* bitfields first get cast to ints */
1904 if (vtop
->type
.t
& VT_BITFIELD
) {
1908 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1909 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1914 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1915 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1917 /* constant case: we can do it now */
1918 /* XXX: in ISOC, cannot do it if error in convert */
1919 if (sbt
== VT_FLOAT
)
1920 vtop
->c
.ld
= vtop
->c
.f
;
1921 else if (sbt
== VT_DOUBLE
)
1922 vtop
->c
.ld
= vtop
->c
.d
;
1925 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1926 if (sbt
& VT_UNSIGNED
)
1927 vtop
->c
.ld
= vtop
->c
.ull
;
1929 vtop
->c
.ld
= vtop
->c
.ll
;
1931 if (sbt
& VT_UNSIGNED
)
1932 vtop
->c
.ld
= vtop
->c
.ui
;
1934 vtop
->c
.ld
= vtop
->c
.i
;
1937 if (dbt
== VT_FLOAT
)
1938 vtop
->c
.f
= (float)vtop
->c
.ld
;
1939 else if (dbt
== VT_DOUBLE
)
1940 vtop
->c
.d
= (double)vtop
->c
.ld
;
1941 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1942 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1943 } else if (sf
&& dbt
== VT_BOOL
) {
1944 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1947 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1948 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1949 vtop
->c
.ll
= vtop
->c
.ull
;
1950 else if (sbt
& VT_UNSIGNED
)
1951 vtop
->c
.ll
= vtop
->c
.ui
;
1952 #ifdef TCC_TARGET_X86_64
1953 else if (sbt
== VT_PTR
)
1956 else if (sbt
!= VT_LLONG
)
1957 vtop
->c
.ll
= vtop
->c
.i
;
1959 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1960 vtop
->c
.ull
= vtop
->c
.ll
;
1961 else if (dbt
== VT_BOOL
)
1962 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1963 #ifdef TCC_TARGET_X86_64
1964 else if (dbt
== VT_PTR
)
1967 else if (dbt
!= VT_LLONG
) {
1969 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1971 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1973 if(dbt
& VT_UNSIGNED
)
1974 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1976 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1979 } else if (p
&& dbt
== VT_BOOL
) {
1982 } else if (!nocode_wanted
) {
1983 /* non constant case: generate code */
1985 /* convert from fp to fp */
1988 /* convert int to fp */
1991 /* convert fp to int */
1992 if (dbt
== VT_BOOL
) {
1996 /* we handle char/short/etc... with generic code */
1997 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1998 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
2002 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
2003 /* additional cast for char/short... */
2008 #ifndef TCC_TARGET_X86_64
2009 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
2010 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
2011 /* scalar to long long */
2012 /* machine independent conversion */
2014 /* generate high word */
2015 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2019 if (sbt
== VT_PTR
) {
2020 /* cast from pointer to int before we apply
2021 shift operation, which pointers don't support*/
2022 gen_cast(&int_type
);
2028 /* patch second register */
2029 vtop
[-1].r2
= vtop
->r
;
2033 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2034 (dbt
& VT_BTYPE
) == VT_PTR
||
2035 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2036 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2037 (sbt
& VT_BTYPE
) != VT_PTR
&&
2038 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2039 /* need to convert from 32bit to 64bit */
2041 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2042 /* x86_64 specific: movslq */
2044 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2048 } else if (dbt
== VT_BOOL
) {
2049 /* scalar to bool */
2052 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2053 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2054 if (sbt
== VT_PTR
) {
2055 vtop
->type
.t
= VT_INT
;
2056 tcc_warning("nonportable conversion from pointer to char/short");
2058 force_charshort_cast(dbt
);
2059 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2061 if (sbt
== VT_LLONG
) {
2062 /* from long long: just take low order word */
2066 /* if lvalue and single word type, nothing to do because
2067 the lvalue already contains the real type size (see
2068 VT_LVAL_xxx constants) */
2071 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2072 /* if we are casting between pointer types,
2073 we must update the VT_LVAL_xxx size */
2074 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2075 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2080 /* return type size as known at compile time. Put alignment at 'a' */
2081 ST_FUNC
int type_size(CType
*type
, int *a
)
2087 bt
= type
->t
& VT_BTYPE
;
2088 if (bt
== VT_STRUCT
) {
2089 assert(!(type
->t
& VT_VLS
));
2094 } else if (bt
== VT_PTR
) {
2095 if (type
->t
& VT_ARRAY
) {
2098 ts
= type_size(&s
->type
, a
);
2099 if (ts
< 0 && s
->c
< 0)
2101 size
= (size_t)ts
* s
->c
;
2106 } else if (bt
== VT_LDOUBLE
) {
2108 size
= LDOUBLE_SIZE
;
2109 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2110 #ifdef TCC_TARGET_I386
2111 #ifdef TCC_TARGET_PE
2116 #elif defined(TCC_TARGET_ARM)
2126 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2129 } else if (bt
== VT_SHORT
) {
2132 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2136 /* char, void, function, _Bool */
2140 assert(size
== (int)size
);
2144 /* push type size as known at runtime time on top of value stack. Put
2146 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2148 if (type
->t
& VT_VLA
) {
2149 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2151 vpushi(type_size(type
, a
));
2155 static void vla_sp_save(void) {
2156 if (!(vla_flags
& VLA_SP_LOC_SET
)) {
2157 *vla_sp_loc
= (loc
-= PTR_SIZE
);
2158 vla_flags
|= VLA_SP_LOC_SET
;
2160 if (!(vla_flags
& VLA_SP_SAVED
)) {
2161 gen_vla_sp_save(*vla_sp_loc
);
2162 vla_flags
|= VLA_SP_SAVED
;
2166 /* return the pointed type of t */
2167 static inline CType
*pointed_type(CType
*type
)
2169 return &type
->ref
->type
;
2172 /* modify type so that its it is a pointer to type. */
2173 ST_FUNC
void mk_pointer(CType
*type
)
2176 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2177 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2181 /* compare function types. OLD functions match any new functions */
2182 static int is_compatible_func(CType
*type1
, CType
*type2
)
2188 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2190 /* check func_call */
2191 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2193 /* XXX: not complete */
2194 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2198 while (s1
!= NULL
) {
2201 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2211 /* return true if type1 and type2 are the same. If unqualified is
2212 true, qualifiers on the types are ignored.
2214 - enums are not checked as gcc __builtin_types_compatible_p ()
2216 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2220 t1
= type1
->t
& VT_TYPE
;
2221 t2
= type2
->t
& VT_TYPE
;
2223 /* strip qualifiers before comparing */
2224 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2225 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2227 /* Default Vs explicit signedness only matters for char */
2228 if ((t1
& VT_BTYPE
) != VT_BYTE
) {
2232 /* XXX: bitfields ? */
2235 /* test more complicated cases */
2236 bt1
= t1
& VT_BTYPE
;
2237 if (bt1
== VT_PTR
) {
2238 type1
= pointed_type(type1
);
2239 type2
= pointed_type(type2
);
2240 return is_compatible_types(type1
, type2
);
2241 } else if (bt1
== VT_STRUCT
) {
2242 return (type1
->ref
== type2
->ref
);
2243 } else if (bt1
== VT_FUNC
) {
2244 return is_compatible_func(type1
, type2
);
2250 /* return true if type1 and type2 are exactly the same (including
2253 static int is_compatible_types(CType
*type1
, CType
*type2
)
2255 return compare_types(type1
,type2
,0);
2258 /* return true if type1 and type2 are the same (ignoring qualifiers).
2260 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2262 return compare_types(type1
,type2
,1);
2265 /* print a type. If 'varstr' is not NULL, then the variable is also
2266 printed in the type */
2268 /* XXX: add array and function pointers */
2269 static void type_to_str(char *buf
, int buf_size
,
2270 CType
*type
, const char *varstr
)
2277 t
= type
->t
& VT_TYPE
;
2280 if (t
& VT_CONSTANT
)
2281 pstrcat(buf
, buf_size
, "const ");
2282 if (t
& VT_VOLATILE
)
2283 pstrcat(buf
, buf_size
, "volatile ");
2284 if ((t
& (VT_DEFSIGN
| VT_UNSIGNED
)) == (VT_DEFSIGN
| VT_UNSIGNED
))
2285 pstrcat(buf
, buf_size
, "unsigned ");
2286 else if (t
& VT_DEFSIGN
)
2287 pstrcat(buf
, buf_size
, "signed ");
2317 tstr
= "long double";
2319 pstrcat(buf
, buf_size
, tstr
);
2323 if (bt
== VT_STRUCT
)
2327 pstrcat(buf
, buf_size
, tstr
);
2328 v
= type
->ref
->v
& ~SYM_STRUCT
;
2329 if (v
>= SYM_FIRST_ANOM
)
2330 pstrcat(buf
, buf_size
, "<anonymous>");
2332 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2336 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2337 pstrcat(buf
, buf_size
, "(");
2339 while (sa
!= NULL
) {
2340 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2341 pstrcat(buf
, buf_size
, buf1
);
2344 pstrcat(buf
, buf_size
, ", ");
2346 pstrcat(buf
, buf_size
, ")");
2350 pstrcpy(buf1
, sizeof(buf1
), "*");
2352 pstrcat(buf1
, sizeof(buf1
), varstr
);
2353 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2357 pstrcat(buf
, buf_size
, " ");
2358 pstrcat(buf
, buf_size
, varstr
);
2363 /* verify type compatibility to store vtop in 'dt' type, and generate
2365 static void gen_assign_cast(CType
*dt
)
2367 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2368 char buf1
[256], buf2
[256];
2371 st
= &vtop
->type
; /* source type */
2372 dbt
= dt
->t
& VT_BTYPE
;
2373 sbt
= st
->t
& VT_BTYPE
;
2374 if (sbt
== VT_VOID
|| dbt
== VT_VOID
)
2375 tcc_error("cannot cast from/to void");
2376 if (dt
->t
& VT_CONSTANT
)
2377 tcc_warning("assignment of read-only location");
2380 /* special cases for pointers */
2381 /* '0' can also be a pointer */
2382 if (is_null_pointer(vtop
))
2384 /* accept implicit pointer to integer cast with warning */
2385 if (is_integer_btype(sbt
)) {
2386 tcc_warning("assignment makes pointer from integer without a cast");
2389 type1
= pointed_type(dt
);
2390 /* a function is implicitely a function pointer */
2391 if (sbt
== VT_FUNC
) {
2392 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2393 !is_compatible_types(pointed_type(dt
), st
))
2394 tcc_warning("assignment from incompatible pointer type");
2399 type2
= pointed_type(st
);
2400 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2401 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2402 /* void * can match anything */
2404 /* exact type match, except for unsigned */
2407 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2409 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2411 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2412 tcc_warning("assignment from incompatible pointer type");
2414 /* check const and volatile */
2415 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2416 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2417 tcc_warning("assignment discards qualifiers from pointer target type");
2423 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2424 tcc_warning("assignment makes integer from pointer without a cast");
2426 /* XXX: more tests */
2431 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2432 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2433 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2435 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2436 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2437 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2445 static void vstore_im(){
2446 int rc
, ft
, sbt
, dbt
, t
, r
;
2447 ft
= vtop
[-1].type
.t
;
2448 sbt
= vtop
->type
.t
& VT_BTYPE
;
2449 dbt
= ft
& VT_BTYPE
;
2452 #ifdef TCC_TARGET_X86_64
2453 if (dbt
== VT_LDOUBLE
) {
2459 r
= gv(rc
); /* generate value */
2460 /* if lvalue was saved on stack, must read it */
2461 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2463 t
= get_reg(RC_INT
);
2464 #ifdef TCC_TARGET_X86_64
2469 sv
.r
= VT_LOCAL
| VT_LVAL
;
2470 sv
.c
.ul
= vtop
[-1].c
.ul
;
2472 vtop
[-1].r
= t
| VT_LVAL
;
2475 /* two word case handling : store second register at word + 4 */
2476 #ifdef TCC_TARGET_X86_64
2477 if ((dbt
== VT_QLONG
) || (dbt
== VT_QFLOAT
))
2479 if (dbt
== VT_LLONG
)
2482 #ifdef TCC_TARGET_X86_64
2483 int load_size
= 8, load_type
= (sbt
== VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2485 int load_size
= 4, load_type
= VT_INT
;
2487 vtop
[-1].type
.t
= load_type
;
2490 /* convert to int to increment easily */
2491 vtop
->type
= char_pointer_type
;
2497 vtop
[-1].type
.t
= load_type
;
2498 /* XXX: it works because r2 is spilled last ! */
2499 store(vtop
->r2
, vtop
- 1);
2501 vtop
[-1].type
.t
= ft
;
2507 /* store vtop in lvalue pushed on stack */
2508 ST_FUNC
void vstore(void)
2510 int sbt
, dbt
, ft
, size
, align
, bit_size
, bit_pos
, delayed_cast
;
2512 ft
= vtop
[-1].type
.t
;
2513 sbt
= vtop
->type
.t
& VT_BTYPE
;
2514 dbt
= ft
& VT_BTYPE
;
2515 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2516 (sbt
== VT_INT
&& dbt
== VT_SHORT
)) && !(vtop
->type
.t
& VT_BITFIELD
)) {
2517 /* optimize char/short casts */
2518 delayed_cast
= VT_MUSTCAST
;
2519 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2520 /* XXX: factorize */
2521 if (ft
& VT_CONSTANT
)
2522 tcc_warning("assignment of read-only location");
2525 if (!(ft
& VT_BITFIELD
))
2526 gen_assign_cast(&vtop
[-1].type
);
2529 if (sbt
== VT_STRUCT
) {
2530 /* if structure, only generate pointer */
2531 /* structure assignment : generate memcpy */
2532 /* XXX: optimize if small size */
2533 if (!nocode_wanted
) {
2534 size
= type_size(&vtop
->type
, &align
);
2538 vtop
->type
.t
= VT_PTR
;
2541 /* address of memcpy() */
2544 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2545 else if(!(align
& 3))
2546 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2549 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2554 vtop
->type
.t
= VT_PTR
;
2563 /* leave source on stack */
2564 } else if (ft
& VT_BITFIELD
) {
2565 /* bitfield store handling */
2566 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2567 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2568 /* remove bit field info to avoid loops */
2569 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2570 /* duplicate source into other register */
2571 if(dbt
== VT_BOOL
) {
2572 gen_cast(&vtop
[-1].type
);
2573 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2576 /* duplicate destination */
2578 vtop
[-1] = vtop
[-2];
2580 /* mask and shift source */
2581 if(dbt
!= VT_BOOL
) {
2582 if(dbt
== VT_LLONG
) {
2583 vpushll((1ULL << bit_size
) - 1ULL);
2585 vpushi((1 << bit_size
) - 1);
2591 /* load destination, mask and or with source */
2593 if(dbt
== VT_LLONG
) {
2594 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2596 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2603 #ifdef CONFIG_TCC_BCHECK
2604 /* bound check case */
2605 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2611 if (!nocode_wanted
) {
2615 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2616 vtop
->r
|= delayed_cast
;
2620 /* post defines POST/PRE add. c is the token ++ or -- */
2621 ST_FUNC
void inc(int post
, int c
)
2624 vdup(); /* save lvalue */
2626 gv_dup(); /* duplicate value */
2631 vpushi(c
- TOK_MID
);
2633 vstore(); /* store value */
2635 vpop(); /* if post op, return saved value */
2638 /* Parse GNUC __attribute__ extension. Currently, the following
2639 extensions are recognized:
2640 - aligned(n) : set data/function alignment.
2641 - packed : force data alignment to 1
2642 - section(x) : generate data/code in this section.
2643 - unused : currently ignored, but may be used someday.
2644 - regparm(n) : pass function parameters in registers (i386 only)
2646 static void parse_attribute(AttributeDef
*ad
)
2650 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2654 while (tok
!= ')') {
2655 if (tok
< TOK_IDENT
)
2656 expect("attribute name");
2664 expect("section name");
2665 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2673 expect("alias(\"target\")");
2674 ad
->alias_target
= /* save string as token, for later */
2675 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2679 case TOK_VISIBILITY1
:
2680 case TOK_VISIBILITY2
:
2683 expect("visibility(\"default|hidden|internal|protected\")");
2684 if (!strcmp (tokc
.cstr
->data
, "default"))
2685 ad
->a
.visibility
= STV_DEFAULT
;
2686 else if (!strcmp (tokc
.cstr
->data
, "hidden"))
2687 ad
->a
.visibility
= STV_HIDDEN
;
2688 else if (!strcmp (tokc
.cstr
->data
, "internal"))
2689 ad
->a
.visibility
= STV_INTERNAL
;
2690 else if (!strcmp (tokc
.cstr
->data
, "protected"))
2691 ad
->a
.visibility
= STV_PROTECTED
;
2693 expect("visibility(\"default|hidden|internal|protected\")");
2702 if (n
<= 0 || (n
& (n
- 1)) != 0)
2703 tcc_error("alignment must be a positive power of two");
2720 /* currently, no need to handle it because tcc does not
2721 track unused objects */
2725 /* currently, no need to handle it because tcc does not
2726 track unused objects */
2731 ad
->a
.func_call
= FUNC_CDECL
;
2736 ad
->a
.func_call
= FUNC_STDCALL
;
2738 #ifdef TCC_TARGET_I386
2748 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
2754 ad
->a
.func_call
= FUNC_FASTCALLW
;
2761 ad
->a
.mode
= VT_LLONG
+ 1;
2764 ad
->a
.mode
= VT_SHORT
+ 1;
2767 ad
->a
.mode
= VT_INT
+ 1;
2770 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2777 ad
->a
.func_export
= 1;
2780 ad
->a
.func_import
= 1;
2783 if (tcc_state
->warn_unsupported
)
2784 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2785 /* skip parameters */
2787 int parenthesis
= 0;
2791 else if (tok
== ')')
2794 } while (parenthesis
&& tok
!= -1);
2807 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2808 static void struct_decl(CType
*type
, int u
, int tdef
)
2810 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
;
2811 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2812 Sym
*s
, *ss
, *ass
, **ps
;
2816 a
= tok
; /* save decl type */
2821 /* struct already defined ? return it */
2823 expect("struct/union/enum name");
2827 tcc_error("invalid type");
2829 } else if (tok
>= TOK_IDENT
&& !tdef
)
2830 tcc_error("unknown struct/union/enum");
2836 /* we put an undefined size for struct/union */
2837 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2838 s
->r
= 0; /* default alignment is zero as gcc */
2839 /* put struct/union/enum name in type */
2847 tcc_error("struct/union/enum already defined");
2848 /* cannot be empty */
2850 /* non empty enums are not allowed */
2851 if (a
== TOK_ENUM
) {
2855 expect("identifier");
2857 if (ss
&& !local_stack
)
2858 tcc_error("redefinition of enumerator '%s'",
2859 get_tok_str(v
, NULL
));
2865 /* enum symbols have static storage */
2866 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2867 ss
->type
.t
|= VT_STATIC
;
2872 /* NOTE: we accept a trailing comma */
2876 s
->c
= type_size(&int_type
, &align
);
2885 while (tok
!= '}') {
2886 parse_btype(&btype
, &ad
);
2889 tcc_error("flexible array member '%s' not at the end of struct",
2890 get_tok_str(v
, NULL
));
2895 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2896 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2897 expect("identifier");
2898 if (type_size(&type1
, &align
) < 0) {
2899 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
2902 tcc_error("field '%s' has incomplete type",
2903 get_tok_str(v
, NULL
));
2905 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2906 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2907 tcc_error("invalid type for '%s'",
2908 get_tok_str(v
, NULL
));
2912 bit_size
= expr_const();
2913 /* XXX: handle v = 0 case for messages */
2915 tcc_error("negative width in bit-field '%s'",
2916 get_tok_str(v
, NULL
));
2917 if (v
&& bit_size
== 0)
2918 tcc_error("zero width for bit-field '%s'",
2919 get_tok_str(v
, NULL
));
2921 size
= type_size(&type1
, &align
);
2923 if (align
< ad
.a
.aligned
)
2924 align
= ad
.a
.aligned
;
2925 } else if (ad
.a
.packed
) {
2927 } else if (*tcc_state
->pack_stack_ptr
) {
2928 if (align
> *tcc_state
->pack_stack_ptr
)
2929 align
= *tcc_state
->pack_stack_ptr
;
2932 if (bit_size
>= 0) {
2933 bt
= type1
.t
& VT_BTYPE
;
2940 tcc_error("bitfields must have scalar type");
2942 if (bit_size
> bsize
) {
2943 tcc_error("width of '%s' exceeds its type",
2944 get_tok_str(v
, NULL
));
2945 } else if (bit_size
== bsize
) {
2946 /* no need for bit fields */
2948 } else if (bit_size
== 0) {
2949 /* XXX: what to do if only padding in a
2951 /* zero size: means to pad */
2954 /* we do not have enough room ?
2955 did the type change?
2957 if ((bit_pos
+ bit_size
) > bsize
||
2958 bt
!= prevbt
|| a
== TOK_UNION
)
2961 /* XXX: handle LSB first */
2962 type1
.t
|= VT_BITFIELD
|
2963 (bit_pos
<< VT_STRUCT_SHIFT
) |
2964 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2965 bit_pos
+= bit_size
;
2971 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2972 /* add new memory data only if starting
2974 if (lbit_pos
== 0) {
2975 if (a
== TOK_STRUCT
) {
2976 c
= (c
+ align
- 1) & -align
;
2985 if (align
> maxalign
)
2989 printf("add field %s offset=%d",
2990 get_tok_str(v
, NULL
), offset
);
2991 if (type1
.t
& VT_BITFIELD
) {
2992 printf(" pos=%d size=%d",
2993 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2994 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2999 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3001 while ((ass
= ass
->next
) != NULL
) {
3002 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3007 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3011 if (tok
== ';' || tok
== TOK_EOF
)
3018 /* store size and alignment */
3019 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3025 /* return 1 if basic type is a type size (short, long, long long) */
3026 ST_FUNC
int is_btype_size(int bt
)
3028 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3031 /* return 0 if no type declaration. otherwise, return the basic type
3034 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3036 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3040 memset(ad
, 0, sizeof(AttributeDef
));
3048 /* currently, we really ignore extension */
3059 tcc_error("too many basic types");
3061 bt_size
= is_btype_size (u
& VT_BTYPE
);
3062 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3077 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3078 #ifndef TCC_TARGET_PE
3079 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3081 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3082 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3096 if ((t
& VT_BTYPE
) == VT_LONG
) {
3097 #ifdef TCC_TARGET_PE
3098 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3100 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3108 struct_decl(&type1
, VT_ENUM
, t
& VT_TYPEDEF
);
3111 type
->ref
= type1
.ref
;
3115 struct_decl(&type1
, VT_STRUCT
, t
& VT_TYPEDEF
);
3118 /* type modifiers */
3134 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3135 tcc_error("signed and unsigned modifier");
3148 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3149 tcc_error("signed and unsigned modifier");
3150 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3175 /* GNUC attribute */
3176 case TOK_ATTRIBUTE1
:
3177 case TOK_ATTRIBUTE2
:
3178 parse_attribute(ad
);
3181 t
= (t
& ~VT_BTYPE
) | u
;
3189 parse_expr_type(&type1
);
3190 /* remove all storage modifiers except typedef */
3191 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3197 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3199 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3200 type
->ref
= s
->type
.ref
;
3202 /* get attributes from typedef */
3203 if (0 == ad
->a
.aligned
)
3204 ad
->a
.aligned
= s
->a
.aligned
;
3205 if (0 == ad
->a
.func_call
)
3206 ad
->a
.func_call
= s
->a
.func_call
;
3207 ad
->a
.packed
|= s
->a
.packed
;
3216 if (tcc_state
->char_is_unsigned
) {
3217 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3221 /* long is never used as type */
3222 if ((t
& VT_BTYPE
) == VT_LONG
)
3223 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3224 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3226 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3232 /* convert a function parameter type (array to pointer and function to
3233 function pointer) */
3234 static inline void convert_parameter_type(CType
*pt
)
3236 /* remove const and volatile qualifiers (XXX: const could be used
3237 to indicate a const function parameter */
3238 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3239 /* array must be transformed to pointer according to ANSI C */
3241 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3246 ST_FUNC
void parse_asm_str(CString
*astr
)
3249 /* read the string */
3251 expect("string constant");
3253 while (tok
== TOK_STR
) {
3254 /* XXX: add \0 handling too ? */
3255 cstr_cat(astr
, tokc
.cstr
->data
);
3258 cstr_ccat(astr
, '\0');
3261 /* Parse an asm label and return the label
3262 * Don't forget to free the CString in the caller! */
3263 static void asm_label_instr(CString
*astr
)
3266 parse_asm_str(astr
);
3269 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3273 static void post_type(CType
*type
, AttributeDef
*ad
)
3275 int n
, l
, t1
, arg_size
, align
;
3276 Sym
**plast
, *s
, *first
;
3281 /* function declaration */
3289 /* read param name and compute offset */
3290 if (l
!= FUNC_OLD
) {
3291 if (!parse_btype(&pt
, &ad1
)) {
3293 tcc_error("invalid type");
3300 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3302 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3303 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3304 tcc_error("parameter declared as void");
3305 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3310 expect("identifier");
3314 convert_parameter_type(&pt
);
3315 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3321 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3328 /* if no parameters, then old type prototype */
3332 /* NOTE: const is ignored in returned type as it has a special
3333 meaning in gcc / C++ */
3334 type
->t
&= ~VT_CONSTANT
;
3335 /* some ancient pre-K&R C allows a function to return an array
3336 and the array brackets to be put after the arguments, such
3337 that "int c()[]" means something like "int[] c()" */
3340 skip(']'); /* only handle simple "[]" */
3343 /* we push a anonymous symbol which will contain the function prototype */
3344 ad
->a
.func_args
= arg_size
;
3345 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3350 } else if (tok
== '[') {
3351 /* array definition */
3353 if (tok
== TOK_RESTRICT1
)
3358 if (!local_stack
|| nocode_wanted
)
3359 vpushi(expr_const());
3361 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3364 tcc_error("invalid array size");
3366 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3367 tcc_error("size of variable length array should be an integer");
3372 /* parse next post type */
3373 post_type(type
, ad
);
3374 if (type
->t
== VT_FUNC
)
3375 tcc_error("declaration of an array of functions");
3376 t1
|= type
->t
& VT_VLA
;
3379 loc
-= type_size(&int_type
, &align
);
3383 vla_runtime_type_size(type
, &align
);
3385 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3392 /* we push an anonymous symbol which will contain the array
3394 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3395 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3400 /* Parse a type declaration (except basic type), and return the type
3401 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3402 expected. 'type' should contain the basic type. 'ad' is the
3403 attribute definition of the basic type. It can be modified by
3406 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3409 CType type1
, *type2
;
3410 int qualifiers
, storage
;
3412 while (tok
== '*') {
3420 qualifiers
|= VT_CONSTANT
;
3425 qualifiers
|= VT_VOLATILE
;
3433 type
->t
|= qualifiers
;
3436 /* XXX: clarify attribute handling */
3437 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3438 parse_attribute(ad
);
3440 /* recursive type */
3441 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3442 type1
.t
= 0; /* XXX: same as int */
3445 /* XXX: this is not correct to modify 'ad' at this point, but
3446 the syntax is not clear */
3447 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3448 parse_attribute(ad
);
3449 type_decl(&type1
, ad
, v
, td
);
3452 /* type identifier */
3453 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3457 if (!(td
& TYPE_ABSTRACT
))
3458 expect("identifier");
3462 storage
= type
->t
& VT_STORAGE
;
3463 type
->t
&= ~VT_STORAGE
;
3464 if (storage
& VT_STATIC
) {
3465 int saved_nocode_wanted
= nocode_wanted
;
3467 post_type(type
, ad
);
3468 nocode_wanted
= saved_nocode_wanted
;
3470 post_type(type
, ad
);
3472 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3473 parse_attribute(ad
);
3477 /* append type at the end of type1 */
3490 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3491 ST_FUNC
int lvalue_type(int t
)
3496 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3498 else if (bt
== VT_SHORT
)
3502 if (t
& VT_UNSIGNED
)
3503 r
|= VT_LVAL_UNSIGNED
;
3507 /* indirection with full error checking and bound check */
3508 ST_FUNC
void indir(void)
3510 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3511 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3515 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3517 vtop
->type
= *pointed_type(&vtop
->type
);
3518 /* Arrays and functions are never lvalues */
3519 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3520 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3521 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3522 /* if bound checking, the referenced pointer must be checked */
3523 #ifdef CONFIG_TCC_BCHECK
3524 if (tcc_state
->do_bounds_check
)
3525 vtop
->r
|= VT_MUSTBOUND
;
3530 /* pass a parameter to a function and do type checking and casting */
3531 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3536 func_type
= func
->c
;
3537 if (func_type
== FUNC_OLD
||
3538 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3539 /* default casting : only need to convert float to double */
3540 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3543 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3544 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3547 } else if (arg
== NULL
) {
3548 tcc_error("too many arguments to function");
3551 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3552 gen_assign_cast(&type
);
3556 /* parse an expression of the form '(type)' or '(expr)' and return its
3558 static void parse_expr_type(CType
*type
)
3564 if (parse_btype(type
, &ad
)) {
3565 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3572 static void parse_type(CType
*type
)
3577 if (!parse_btype(type
, &ad
)) {
3580 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3583 static void vpush_tokc(int t
)
3588 vsetc(&type
, VT_CONST
, &tokc
);
3591 ST_FUNC
void unary(void)
3593 int n
, t
, align
, size
, r
, sizeof_caller
;
3597 static int in_sizeof
= 0;
3599 sizeof_caller
= in_sizeof
;
3601 /* XXX: GCC 2.95.3 does not generate a table although it should be
3615 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3619 vpush_tokc(VT_LLONG
);
3623 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3627 vpush_tokc(VT_FLOAT
);
3631 vpush_tokc(VT_DOUBLE
);
3635 vpush_tokc(VT_LDOUBLE
);
3638 case TOK___FUNCTION__
:
3640 goto tok_identifier
;
3646 /* special function name identifier */
3647 len
= strlen(funcname
) + 1;
3648 /* generate char[len] type */
3653 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3654 ptr
= section_ptr_add(data_section
, len
);
3655 memcpy(ptr
, funcname
, len
);
3660 #ifdef TCC_TARGET_PE
3661 t
= VT_SHORT
| VT_UNSIGNED
;
3667 /* string parsing */
3670 if (tcc_state
->warn_write_strings
)
3675 memset(&ad
, 0, sizeof(AttributeDef
));
3676 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3681 if (parse_btype(&type
, &ad
)) {
3682 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3684 /* check ISOC99 compound literal */
3686 /* data is allocated locally by default */
3691 /* all except arrays are lvalues */
3692 if (!(type
.t
& VT_ARRAY
))
3693 r
|= lvalue_type(type
.t
);
3694 memset(&ad
, 0, sizeof(AttributeDef
));
3695 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3697 if (sizeof_caller
) {
3704 } else if (tok
== '{') {
3705 /* save all registers */
3707 /* statement expression : we do not accept break/continue
3708 inside as GCC does */
3709 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3724 /* functions names must be treated as function pointers,
3725 except for unary '&' and sizeof. Since we consider that
3726 functions are not lvalues, we only have to handle it
3727 there and in function calls. */
3728 /* arrays can also be used although they are not lvalues */
3729 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3730 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3732 mk_pointer(&vtop
->type
);
3738 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3740 boolean
.t
= VT_BOOL
;
3742 vtop
->c
.i
= !vtop
->c
.i
;
3743 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3744 vtop
->c
.i
= vtop
->c
.i
^ 1;
3747 vseti(VT_JMP
, gtst(1, 0));
3759 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3760 tcc_error("pointer not accepted for unary plus");
3761 /* In order to force cast, we add zero, except for floating point
3762 where we really need an noop (otherwise -0.0 will be transformed
3764 if (!is_float(vtop
->type
.t
)) {
3775 unary_type(&type
); // Perform a in_sizeof = 0;
3776 size
= type_size(&type
, &align
);
3777 if (t
== TOK_SIZEOF
) {
3778 if (!(type
.t
& VT_VLA
)) {
3780 tcc_error("sizeof applied to an incomplete type");
3783 vla_runtime_type_size(&type
, &align
);
3788 vtop
->type
.t
|= VT_UNSIGNED
;
3791 case TOK_builtin_types_compatible_p
:
3800 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3801 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3802 vpushi(is_compatible_types(&type1
, &type2
));
3805 case TOK_builtin_constant_p
:
3807 int saved_nocode_wanted
, res
;
3810 saved_nocode_wanted
= nocode_wanted
;
3813 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3815 nocode_wanted
= saved_nocode_wanted
;
3820 case TOK_builtin_frame_address
:
3826 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3827 tcc_error("__builtin_frame_address only takes positive integers");
3834 vset(&type
, VT_LOCAL
, 0); /* local frame */
3836 mk_pointer(&vtop
->type
);
3837 indir(); /* -> parent frame */
3841 #ifdef TCC_TARGET_X86_64
3842 #ifdef TCC_TARGET_PE
3843 case TOK_builtin_va_start
:
3851 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
3852 tcc_error("__builtin_va_start expects a local variable");
3853 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
3854 vtop
->type
= char_pointer_type
;
3859 case TOK_builtin_va_arg_types
:
3866 vpushi(classify_x86_64_va_arg(&type
));
3881 t
= vtop
->type
.t
& VT_BTYPE
;
3883 /* In IEEE negate(x) isn't subtract(0,x), but rather
3888 else if (t
== VT_DOUBLE
)
3899 goto tok_identifier
;
3901 /* allow to take the address of a label */
3902 if (tok
< TOK_UIDENT
)
3903 expect("label identifier");
3904 s
= label_find(tok
);
3906 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3908 if (s
->r
== LABEL_DECLARED
)
3909 s
->r
= LABEL_FORWARD
;
3912 s
->type
.t
= VT_VOID
;
3913 mk_pointer(&s
->type
);
3914 s
->type
.t
|= VT_STATIC
;
3916 vpushsym(&s
->type
, s
);
3920 // special qnan , snan and infinity values
3922 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3926 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3930 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3939 expect("identifier");
3942 const char *name
= get_tok_str(t
, NULL
);
3944 tcc_error("'%s' undeclared", name
);
3945 /* for simple function calls, we tolerate undeclared
3946 external reference to int() function */
3947 if (tcc_state
->warn_implicit_function_declaration
3948 #ifdef TCC_TARGET_PE
3949 /* people must be warned about using undeclared WINAPI functions
3950 (which usually start with uppercase letter) */
3951 || (name
[0] >= 'A' && name
[0] <= 'Z')
3954 tcc_warning("implicit declaration of function '%s'", name
);
3955 s
= external_global_sym(t
, &func_old_type
, 0);
3957 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3958 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3959 /* if referencing an inline function, then we generate a
3960 symbol to it if not already done. It will have the
3961 effect to generate code for it at the end of the
3962 compilation unit. Inline function as always
3963 generated in the text section. */
3965 put_extern_sym(s
, text_section
, 0, 0);
3966 r
= VT_SYM
| VT_CONST
;
3970 vset(&s
->type
, r
, s
->c
);
3971 /* if forward reference, we must point to s */
3972 if (vtop
->r
& VT_SYM
) {
3974 vtop
->c
.ptr_offset
= 0;
3979 /* post operations */
3981 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3984 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3987 if (tok
== TOK_ARROW
)
3989 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3993 /* expect pointer on structure */
3994 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3995 expect("struct or union");
3999 while ((s
= s
->next
) != NULL
) {
4004 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
4005 /* add field offset to pointer */
4006 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4009 /* change type to field type, and set to lvalue */
4010 vtop
->type
= s
->type
;
4011 vtop
->type
.t
|= qualifiers
;
4012 /* an array is never an lvalue */
4013 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4014 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4015 #ifdef CONFIG_TCC_BCHECK
4016 /* if bound checking, the referenced pointer must be checked */
4017 if (tcc_state
->do_bounds_check
)
4018 vtop
->r
|= VT_MUSTBOUND
;
4022 } else if (tok
== '[') {
4028 } else if (tok
== '(') {
4031 int nb_args
, ret_nregs
, ret_align
, variadic
;
4034 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4035 /* pointer test (no array accepted) */
4036 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4037 vtop
->type
= *pointed_type(&vtop
->type
);
4038 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4042 expect("function pointer");
4045 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4047 /* get return type */
4050 sa
= s
->next
; /* first parameter */
4053 /* compute first implicit argument if a structure is returned */
4054 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4055 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4056 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4059 /* get some space for the returned structure */
4060 size
= type_size(&s
->type
, &align
);
4061 loc
= (loc
- size
) & -align
;
4063 ret
.r
= VT_LOCAL
| VT_LVAL
;
4064 /* pass it as 'int' to avoid structure arg passing
4066 vseti(VT_LOCAL
, loc
);
4076 /* return in register */
4077 if (is_float(ret
.type
.t
)) {
4078 ret
.r
= reg_fret(ret
.type
.t
);
4079 #ifdef TCC_TARGET_X86_64
4080 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4084 #ifdef TCC_TARGET_X86_64
4085 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4087 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4097 gfunc_param_typed(s
, sa
);
4107 tcc_error("too few arguments to function");
4109 if (!nocode_wanted
) {
4110 gfunc_call(nb_args
);
4112 vtop
-= (nb_args
+ 1);
4116 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4117 vsetc(&ret
.type
, r
, &ret
.c
);
4118 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4121 /* handle packed struct return */
4122 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4125 size
= type_size(&s
->type
, &align
);
4126 loc
= (loc
- size
) & -align
;
4130 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4134 if (--ret_nregs
== 0)
4136 /* XXX: compatible with arm only: ret_align == register_size */
4137 offset
+= ret_align
;
4139 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4147 ST_FUNC
void expr_prod(void)
4152 while (tok
== '*' || tok
== '/' || tok
== '%') {
4160 ST_FUNC
void expr_sum(void)
4165 while (tok
== '+' || tok
== '-') {
4173 static void expr_shift(void)
4178 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4186 static void expr_cmp(void)
4191 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4192 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4200 static void expr_cmpeq(void)
4205 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4213 static void expr_and(void)
4216 while (tok
== '&') {
4223 static void expr_xor(void)
4226 while (tok
== '^') {
4233 static void expr_or(void)
4236 while (tok
== '|') {
4243 /* XXX: fix this mess */
4244 static void expr_land_const(void)
4247 while (tok
== TOK_LAND
) {
4254 /* XXX: fix this mess */
4255 static void expr_lor_const(void)
4258 while (tok
== TOK_LOR
) {
4265 /* only used if non constant */
4266 static void expr_land(void)
4271 if (tok
== TOK_LAND
) {
4276 if (tok
!= TOK_LAND
) {
4286 static void expr_lor(void)
4291 if (tok
== TOK_LOR
) {
4296 if (tok
!= TOK_LOR
) {
4306 /* XXX: better constant handling */
4307 static void expr_cond(void)
4309 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4311 CType type
, type1
, type2
;
4318 boolean
.t
= VT_BOOL
;
4324 if (tok
!= ':' || !gnu_ext
) {
4339 if (vtop
!= vstack
) {
4340 /* needed to avoid having different registers saved in
4342 if (is_float(vtop
->type
.t
)) {
4344 #ifdef TCC_TARGET_X86_64
4345 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4355 if (tok
== ':' && gnu_ext
) {
4363 sv
= *vtop
; /* save value to handle it later */
4364 vtop
--; /* no vpop so that FP stack is not flushed */
4372 bt1
= t1
& VT_BTYPE
;
4374 bt2
= t2
& VT_BTYPE
;
4375 /* cast operands to correct type according to ISOC rules */
4376 if (is_float(bt1
) || is_float(bt2
)) {
4377 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4378 type
.t
= VT_LDOUBLE
;
4379 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4384 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4385 /* cast to biggest op */
4387 /* convert to unsigned if it does not fit in a long long */
4388 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4389 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4390 type
.t
|= VT_UNSIGNED
;
4391 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4392 /* If one is a null ptr constant the result type
4394 if (is_null_pointer (vtop
))
4396 else if (is_null_pointer (&sv
))
4398 /* XXX: test pointer compatibility, C99 has more elaborate
4402 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4403 /* XXX: test function pointer compatibility */
4404 type
= bt1
== VT_FUNC
? type1
: type2
;
4405 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4406 /* XXX: test structure compatibility */
4407 type
= bt1
== VT_STRUCT
? type1
: type2
;
4408 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4409 /* NOTE: as an extension, we accept void on only one side */
4412 /* integer operations */
4414 /* convert to unsigned if it does not fit in an integer */
4415 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4416 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4417 type
.t
|= VT_UNSIGNED
;
4420 /* now we convert second operand */
4422 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4425 if (is_float(type
.t
)) {
4427 #ifdef TCC_TARGET_X86_64
4428 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4432 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4433 /* for long longs, we use fixed registers to avoid having
4434 to handle a complicated move */
4439 /* this is horrible, but we must also convert first
4443 /* put again first value and cast it */
4446 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4449 move_reg(r2
, r1
, type
.t
);
4456 static void expr_eq(void)
4462 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4463 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4464 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4479 ST_FUNC
void gexpr(void)
4490 /* parse an expression and return its type without any side effect. */
4491 static void expr_type(CType
*type
)
4493 int saved_nocode_wanted
;
4495 saved_nocode_wanted
= nocode_wanted
;
4500 nocode_wanted
= saved_nocode_wanted
;
4503 /* parse a unary expression and return its type without any side
4505 static void unary_type(CType
*type
)
4517 /* parse a constant expression and return value in vtop. */
4518 static void expr_const1(void)
4527 /* parse an integer constant and return its value. */
4528 ST_FUNC
int expr_const(void)
4532 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4533 expect("constant expression");
4539 /* return the label token if current token is a label, otherwise
4541 static int is_label(void)
4545 /* fast test first */
4546 if (tok
< TOK_UIDENT
)
4548 /* no need to save tokc because tok is an identifier */
4555 unget_tok(last_tok
);
4560 static void label_or_decl(int l
)
4564 /* fast test first */
4565 if (tok
>= TOK_UIDENT
)
4567 /* no need to save tokc because tok is an identifier */
4571 unget_tok(last_tok
);
4574 unget_tok(last_tok
);
4579 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4580 int case_reg
, int is_expr
)
4583 Sym
*s
, *frame_bottom
;
4585 /* generate line number info */
4586 if (tcc_state
->do_debug
&&
4587 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4588 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4590 last_line_num
= file
->line_num
;
4594 /* default return value is (void) */
4596 vtop
->type
.t
= VT_VOID
;
4599 if (tok
== TOK_IF
) {
4606 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4608 if (c
== TOK_ELSE
) {
4612 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4613 gsym(d
); /* patch else jmp */
4616 } else if (tok
== TOK_WHILE
) {
4624 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4628 } else if (tok
== '{') {
4630 int saved_loc
, saved_pop_stack
, size
;
4631 int block_vla_sp_loc
, *saved_vla_sp_loc
, saved_vla_flags
;
4634 /* record local declaration stack position */
4636 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4637 frame_bottom
->next
= scope_stack_bottom
;
4638 scope_stack_bottom
= frame_bottom
;
4639 llabel
= local_label_stack
;
4642 saved_pop_stack
= pop_stack
;
4644 /* save VLA state */
4645 block_vla_sp_loc
= *(saved_vla_sp_loc
= vla_sp_loc
);
4646 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4647 vla_sp_loc
= &block_vla_sp_loc
;
4649 saved_vla_flags
= vla_flags
;
4650 vla_flags
|= VLA_NEED_NEW_FRAME
;
4652 /* handle local labels declarations */
4653 if (tok
== TOK_LABEL
) {
4656 if (tok
< TOK_UIDENT
)
4657 expect("label identifier");
4658 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4668 while (tok
!= '}') {
4669 label_or_decl(VT_LOCAL
);
4673 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4676 /* pop locally defined labels */
4677 label_pop(&local_label_stack
, llabel
);
4679 /* XXX: this solution makes only valgrind happy...
4680 triggered by gcc.c-torture/execute/20000917-1.c */
4682 switch(vtop
->type
.t
& VT_BTYPE
) {
4687 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4689 tcc_error("unsupported expression type");
4692 /* pop locally defined symbols */
4693 scope_stack_bottom
= scope_stack_bottom
->next
;
4694 sym_pop(&local_stack
, s
);
4696 size
= -(loc
- saved_loc
);
4697 pop_stack
= saved_pop_stack
;
4701 /* Pop VLA frames and restore stack pointer if required */
4702 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4703 *saved_vla_sp_loc
= block_vla_sp_loc
;
4704 if (vla_sp_loc
!= (saved_vla_sp_loc
== &vla_sp_root_loc
? &vla_sp_root_loc
: &block_vla_sp_loc
)) {
4705 vla_sp_loc
= saved_vla_sp_loc
;
4706 gen_vla_sp_restore(*vla_sp_loc
);
4708 vla_flags
= (vla_flags
& ~VLA_SCOPE_FLAGS
) | (saved_vla_flags
& VLA_SCOPE_FLAGS
);
4711 } else if (tok
== TOK_RETURN
) {
4715 gen_assign_cast(&func_vt
);
4716 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4717 CType type
, ret_type
;
4718 int ret_align
, ret_nregs
;
4719 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
4721 if (0 == ret_nregs
) {
4722 /* if returning structure, must copy it to implicit
4723 first pointer arg location */
4726 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4729 /* copy structure value to pointer */
4732 /* returning structure packed into registers */
4733 int rc
, size
, addr
, align
;
4734 size
= type_size(&func_vt
,&align
);
4735 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& (ret_align
-1)))
4736 && (align
& (ret_align
-1))) {
4737 loc
= (loc
- size
) & -align
;
4740 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4743 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
4745 vtop
->type
= ret_type
;
4746 if (is_float(ret_type
.t
))
4747 rc
= rc_fret(ret_type
.t
);
4755 if (--ret_nregs
== 0)
4757 /* We assume that when a structure is returned in multiple
4758 registers, their classes are consecutive values of the
4761 /* XXX: compatible with arm only: ret_align == register_size */
4762 vtop
->c
.i
+= ret_align
;
4763 vtop
->r
= VT_LOCAL
| VT_LVAL
;
4766 } else if (is_float(func_vt
.t
)) {
4767 gv(rc_fret(func_vt
.t
));
4771 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4774 rsym
= gjmp(rsym
); /* jmp */
4775 } else if (tok
== TOK_BREAK
) {
4778 tcc_error("cannot break");
4779 *bsym
= gjmp(*bsym
);
4782 } else if (tok
== TOK_CONTINUE
) {
4785 tcc_error("cannot continue");
4786 *csym
= gjmp(*csym
);
4789 } else if (tok
== TOK_FOR
) {
4794 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4795 frame_bottom
->next
= scope_stack_bottom
;
4796 scope_stack_bottom
= frame_bottom
;
4798 /* c99 for-loop init decl? */
4799 if (!decl0(VT_LOCAL
, 1)) {
4800 /* no, regular for-loop init expr */
4824 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4828 scope_stack_bottom
= scope_stack_bottom
->next
;
4829 sym_pop(&local_stack
, s
);
4831 if (tok
== TOK_DO
) {
4836 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4847 if (tok
== TOK_SWITCH
) {
4851 /* XXX: other types than integer */
4852 case_reg
= gv(RC_INT
);
4856 b
= gjmp(0); /* jump to first case */
4858 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4859 /* if no default, jmp after switch */
4867 if (tok
== TOK_CASE
) {
4874 if (gnu_ext
&& tok
== TOK_DOTS
) {
4878 tcc_warning("empty case range");
4880 /* since a case is like a label, we must skip it with a jmp */
4887 *case_sym
= gtst(1, 0);
4890 *case_sym
= gtst(1, 0);
4894 *case_sym
= gtst(1, *case_sym
);
4899 goto block_after_label
;
4901 if (tok
== TOK_DEFAULT
) {
4907 tcc_error("too many 'default'");
4910 goto block_after_label
;
4912 if (tok
== TOK_GOTO
) {
4914 if (tok
== '*' && gnu_ext
) {
4918 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4921 } else if (tok
>= TOK_UIDENT
) {
4922 s
= label_find(tok
);
4923 /* put forward definition if needed */
4925 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4927 if (s
->r
== LABEL_DECLARED
)
4928 s
->r
= LABEL_FORWARD
;
4930 /* label already defined */
4931 if (vla_flags
& VLA_IN_SCOPE
) {
4932 /* If VLAs are in use, save the current stack pointer and
4933 reset the stack pointer to what it was at function entry
4934 (label will restore stack pointer in inner scopes) */
4936 gen_vla_sp_restore(vla_sp_root_loc
);
4938 if (s
->r
& LABEL_FORWARD
)
4939 s
->jnext
= gjmp(s
->jnext
);
4941 gjmp_addr(s
->jnext
);
4944 expect("label identifier");
4947 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4953 if (vla_flags
& VLA_IN_SCOPE
) {
4954 /* save/restore stack pointer across label
4955 this is a no-op when combined with the load immediately
4956 after the label unless we arrive via goto */
4961 if (s
->r
== LABEL_DEFINED
)
4962 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4964 s
->r
= LABEL_DEFINED
;
4966 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4969 if (vla_flags
& VLA_IN_SCOPE
) {
4970 gen_vla_sp_restore(*vla_sp_loc
);
4971 vla_flags
|= VLA_NEED_NEW_FRAME
;
4973 /* we accept this, but it is a mistake */
4976 tcc_warning("deprecated use of label at end of compound statement");
4980 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4983 /* expression case */
4998 /* t is the array or struct type. c is the array or struct
4999 address. cur_index/cur_field is the pointer to the current
5000 value. 'size_only' is true if only size info is needed (only used
5002 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5003 int *cur_index
, Sym
**cur_field
,
5007 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5013 if (gnu_ext
&& (l
= is_label()) != 0)
5015 while (tok
== '[' || tok
== '.') {
5017 if (!(type
->t
& VT_ARRAY
))
5018 expect("array type");
5021 index
= expr_const();
5022 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5023 expect("invalid index");
5024 if (tok
== TOK_DOTS
&& gnu_ext
) {
5026 index_last
= expr_const();
5027 if (index_last
< 0 ||
5028 (s
->c
>= 0 && index_last
>= s
->c
) ||
5030 expect("invalid index");
5036 *cur_index
= index_last
;
5037 type
= pointed_type(type
);
5038 elem_size
= type_size(type
, &align
);
5039 c
+= index
* elem_size
;
5040 /* NOTE: we only support ranges for last designator */
5041 nb_elems
= index_last
- index
+ 1;
5042 if (nb_elems
!= 1) {
5051 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5052 expect("struct/union type");
5065 /* XXX: fix this mess by using explicit storage field */
5067 type1
.t
|= (type
->t
& ~VT_TYPE
);
5081 if (type
->t
& VT_ARRAY
) {
5083 type
= pointed_type(type
);
5084 c
+= index
* type_size(type
, &align
);
5088 tcc_error("too many field init");
5089 /* XXX: fix this mess by using explicit storage field */
5091 type1
.t
|= (type
->t
& ~VT_TYPE
);
5096 decl_initializer(type
, sec
, c
, 0, size_only
);
5098 /* XXX: make it more general */
5099 if (!size_only
&& nb_elems
> 1) {
5100 unsigned long c_end
;
5105 tcc_error("range init not supported yet for dynamic storage");
5106 c_end
= c
+ nb_elems
* elem_size
;
5107 if (c_end
> sec
->data_allocated
)
5108 section_realloc(sec
, c_end
);
5109 src
= sec
->data
+ c
;
5111 for(i
= 1; i
< nb_elems
; i
++) {
5113 memcpy(dst
, src
, elem_size
);
5119 #define EXPR_CONST 1
5122 /* store a value or an expression directly in global data or in local array */
5123 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5124 int v
, int expr_type
)
5126 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5128 unsigned long long bit_mask
;
5136 /* compound literals must be allocated globally in this case */
5137 saved_global_expr
= global_expr
;
5140 global_expr
= saved_global_expr
;
5141 /* NOTE: symbols are accepted */
5142 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5143 tcc_error("initializer element is not constant");
5151 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5154 /* XXX: not portable */
5155 /* XXX: generate error if incorrect relocation */
5156 gen_assign_cast(&dtype
);
5157 bt
= type
->t
& VT_BTYPE
;
5158 /* we'll write at most 12 bytes */
5159 if (c
+ 12 > sec
->data_allocated
) {
5160 section_realloc(sec
, c
+ 12);
5162 ptr
= sec
->data
+ c
;
5163 /* XXX: make code faster ? */
5164 if (!(type
->t
& VT_BITFIELD
)) {
5169 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5170 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5171 bit_mask
= (1LL << bit_size
) - 1;
5173 if ((vtop
->r
& VT_SYM
) &&
5179 (bt
== VT_INT
&& bit_size
!= 32)))
5180 tcc_error("initializer element is not computable at load time");
5183 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5185 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5188 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5191 *(double *)ptr
= vtop
->c
.d
;
5194 *(long double *)ptr
= vtop
->c
.ld
;
5197 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
5200 if (vtop
->r
& VT_SYM
) {
5201 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5203 *(addr_t
*)ptr
|= (vtop
->c
.ptr_offset
& bit_mask
) << bit_pos
;
5206 if (vtop
->r
& VT_SYM
) {
5207 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5209 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5214 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5221 /* put zeros for variable based init */
5222 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5225 /* nothing to do because globals are already set to zero */
5227 vpush_global_sym(&func_old_type
, TOK_memset
);
5229 #ifdef TCC_TARGET_ARM
5240 /* 't' contains the type and storage info. 'c' is the offset of the
5241 object in section 'sec'. If 'sec' is NULL, it means stack based
5242 allocation. 'first' is true if array '{' must be read (multi
5243 dimension implicit array init handling). 'size_only' is true if
5244 size only evaluation is wanted (only for arrays). */
5245 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5246 int first
, int size_only
)
5248 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5249 int size1
, align1
, expr_type
;
5253 if (type
->t
& VT_VLA
) {
5256 /* save current stack pointer */
5257 if (vla_flags
& VLA_NEED_NEW_FRAME
) {
5259 vla_flags
= VLA_IN_SCOPE
;
5260 vla_sp_loc
= &vla_sp_loc_tmp
;
5263 vla_runtime_type_size(type
, &a
);
5264 gen_vla_alloc(type
, a
);
5265 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5269 } else if (type
->t
& VT_ARRAY
) {
5273 t1
= pointed_type(type
);
5274 size1
= type_size(t1
, &align1
);
5277 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5280 tcc_error("character array initializer must be a literal,"
5281 " optionally enclosed in braces");
5286 /* only parse strings here if correct type (otherwise: handle
5287 them as ((w)char *) expressions */
5288 if ((tok
== TOK_LSTR
&&
5289 #ifdef TCC_TARGET_PE
5290 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5292 (t1
->t
& VT_BTYPE
) == VT_INT
5294 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5295 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5300 /* compute maximum number of chars wanted */
5302 cstr_len
= cstr
->size
;
5304 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5307 if (n
>= 0 && nb
> (n
- array_length
))
5308 nb
= n
- array_length
;
5311 tcc_warning("initializer-string for array is too long");
5312 /* in order to go faster for common case (char
5313 string in global variable, we handle it
5315 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5316 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5320 ch
= ((unsigned char *)cstr
->data
)[i
];
5322 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5323 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5331 /* only add trailing zero if enough storage (no
5332 warning in this case since it is standard) */
5333 if (n
< 0 || array_length
< n
) {
5335 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5341 while (tok
!= '}') {
5342 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5343 if (n
>= 0 && index
>= n
)
5344 tcc_error("index too large");
5345 /* must put zero in holes (note that doing it that way
5346 ensures that it even works with designators) */
5347 if (!size_only
&& array_length
< index
) {
5348 init_putz(t1
, sec
, c
+ array_length
* size1
,
5349 (index
- array_length
) * size1
);
5352 if (index
> array_length
)
5353 array_length
= index
;
5354 /* special test for multi dimensional arrays (may not
5355 be strictly correct if designators are used at the
5357 if (index
>= n
&& no_oblock
)
5366 /* put zeros at the end */
5367 if (!size_only
&& n
>= 0 && array_length
< n
) {
5368 init_putz(t1
, sec
, c
+ array_length
* size1
,
5369 (n
- array_length
) * size1
);
5371 /* patch type size if needed */
5373 s
->c
= array_length
;
5374 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5375 (sec
|| !first
|| tok
== '{')) {
5378 /* NOTE: the previous test is a specific case for automatic
5379 struct/union init */
5380 /* XXX: union needs only one init */
5382 /* XXX: this test is incorrect for local initializers
5383 beginning with ( without {. It would be much more difficult
5384 to do it correctly (ideally, the expression parser should
5385 be used in all cases) */
5391 while (tok
== '(') {
5395 if (!parse_btype(&type1
, &ad1
))
5397 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5399 if (!is_assignable_types(type
, &type1
))
5400 tcc_error("invalid type for cast");
5405 if (first
|| tok
== '{') {
5414 while (tok
!= '}') {
5415 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5417 if (!size_only
&& array_length
< index
) {
5418 init_putz(type
, sec
, c
+ array_length
,
5419 index
- array_length
);
5421 index
= index
+ type_size(&f
->type
, &align1
);
5422 if (index
> array_length
)
5423 array_length
= index
;
5425 /* gr: skip fields from same union - ugly. */
5427 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5428 /* test for same offset */
5429 if (f
->next
->c
!= f
->c
)
5431 /* if yes, test for bitfield shift */
5432 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5433 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5434 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5435 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5436 if (bit_pos_1
!= bit_pos_2
)
5443 if (no_oblock
&& f
== NULL
)
5449 /* put zeros at the end */
5450 if (!size_only
&& array_length
< n
) {
5451 init_putz(type
, sec
, c
+ array_length
,
5460 } else if (tok
== '{') {
5462 decl_initializer(type
, sec
, c
, first
, size_only
);
5464 } else if (size_only
) {
5465 /* just skip expression */
5466 parlevel
= parlevel1
= 0;
5467 while ((parlevel
> 0 || parlevel1
> 0 ||
5468 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5471 else if (tok
== ')')
5473 else if (tok
== '{')
5475 else if (tok
== '}')
5480 /* currently, we always use constant expression for globals
5481 (may change for scripting case) */
5482 expr_type
= EXPR_CONST
;
5484 expr_type
= EXPR_ANY
;
5485 init_putv(type
, sec
, c
, 0, expr_type
);
5489 /* parse an initializer for type 't' if 'has_init' is non zero, and
5490 allocate space in local or global data space ('r' is either
5491 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5492 variable 'v' with an associated name represented by 'asm_label' of
5493 scope 'scope' is declared before initializers are parsed. If 'v' is
5494 zero, then a reference to the new object is put in the value stack.
5495 If 'has_init' is 2, a special parsing is done to handle string
5497 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5498 int has_init
, int v
, char *asm_label
,
5501 int size
, align
, addr
, data_offset
;
5503 ParseState saved_parse_state
= {0};
5504 TokenString init_str
;
5506 Sym
*flexible_array
;
5508 flexible_array
= NULL
;
5509 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5510 Sym
*field
= type
->ref
->next
;
5513 field
= field
->next
;
5514 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5515 flexible_array
= field
;
5519 size
= type_size(type
, &align
);
5520 /* If unknown size, we must evaluate it before
5521 evaluating initializers because
5522 initializers can generate global data too
5523 (e.g. string pointers or ISOC99 compound
5524 literals). It also simplifies local
5525 initializers handling */
5526 tok_str_new(&init_str
);
5527 if (size
< 0 || (flexible_array
&& has_init
)) {
5529 tcc_error("unknown type size");
5530 /* get all init string */
5531 if (has_init
== 2) {
5532 /* only get strings */
5533 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5534 tok_str_add_tok(&init_str
);
5539 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5541 tcc_error("unexpected end of file in initializer");
5542 tok_str_add_tok(&init_str
);
5545 else if (tok
== '}') {
5555 tok_str_add(&init_str
, -1);
5556 tok_str_add(&init_str
, 0);
5559 save_parse_state(&saved_parse_state
);
5561 macro_ptr
= init_str
.str
;
5563 decl_initializer(type
, NULL
, 0, 1, 1);
5564 /* prepare second initializer parsing */
5565 macro_ptr
= init_str
.str
;
5568 /* if still unknown size, error */
5569 size
= type_size(type
, &align
);
5571 tcc_error("unknown type size");
5574 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5575 /* take into account specified alignment if bigger */
5576 if (ad
->a
.aligned
) {
5577 if (ad
->a
.aligned
> align
)
5578 align
= ad
->a
.aligned
;
5579 } else if (ad
->a
.packed
) {
5582 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5584 #ifdef CONFIG_TCC_BCHECK
5585 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5589 loc
= (loc
- size
) & -align
;
5591 #ifdef CONFIG_TCC_BCHECK
5592 /* handles bounds */
5593 /* XXX: currently, since we do only one pass, we cannot track
5594 '&' operators, so we add only arrays */
5595 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5596 unsigned long *bounds_ptr
;
5597 /* add padding between regions */
5599 /* then add local bound info */
5600 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5601 bounds_ptr
[0] = addr
;
5602 bounds_ptr
[1] = size
;
5606 /* local variable */
5607 sym_push(v
, type
, r
, addr
);
5609 /* push local reference */
5610 vset(type
, r
, addr
);
5616 if (v
&& scope
== VT_CONST
) {
5617 /* see if the symbol was already defined */
5620 if (!is_compatible_types(&sym
->type
, type
))
5621 tcc_error("incompatible types for redefinition of '%s'",
5622 get_tok_str(v
, NULL
));
5623 if (sym
->type
.t
& VT_EXTERN
) {
5624 /* if the variable is extern, it was not allocated */
5625 sym
->type
.t
&= ~VT_EXTERN
;
5626 /* set array size if it was omitted in extern
5628 if ((sym
->type
.t
& VT_ARRAY
) &&
5629 sym
->type
.ref
->c
< 0 &&
5631 sym
->type
.ref
->c
= type
->ref
->c
;
5633 /* we accept several definitions of the same
5634 global variable. this is tricky, because we
5635 must play with the SHN_COMMON type of the symbol */
5636 /* XXX: should check if the variable was already
5637 initialized. It is incorrect to initialized it
5639 /* no init data, we won't add more to the symbol */
5646 /* allocate symbol in corresponding section */
5651 else if (tcc_state
->nocommon
)
5655 data_offset
= sec
->data_offset
;
5656 data_offset
= (data_offset
+ align
- 1) & -align
;
5658 /* very important to increment global pointer at this time
5659 because initializers themselves can create new initializers */
5660 data_offset
+= size
;
5661 #ifdef CONFIG_TCC_BCHECK
5662 /* add padding if bound check */
5663 if (tcc_state
->do_bounds_check
)
5666 sec
->data_offset
= data_offset
;
5667 /* allocate section space to put the data */
5668 if (sec
->sh_type
!= SHT_NOBITS
&&
5669 data_offset
> sec
->data_allocated
)
5670 section_realloc(sec
, data_offset
);
5671 /* align section if needed */
5672 if (align
> sec
->sh_addralign
)
5673 sec
->sh_addralign
= align
;
5675 addr
= 0; /* avoid warning */
5679 if (scope
!= VT_CONST
|| !sym
) {
5680 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5681 sym
->asm_label
= asm_label
;
5683 /* update symbol definition */
5685 put_extern_sym(sym
, sec
, addr
, size
);
5688 /* put a common area */
5689 put_extern_sym(sym
, NULL
, align
, size
);
5690 /* XXX: find a nicer way */
5691 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5692 esym
->st_shndx
= SHN_COMMON
;
5695 /* push global reference */
5696 sym
= get_sym_ref(type
, sec
, addr
, size
);
5697 vpushsym(type
, sym
);
5699 /* patch symbol weakness */
5700 if (type
->t
& VT_WEAK
)
5702 apply_visibility(sym
, type
);
5703 #ifdef CONFIG_TCC_BCHECK
5704 /* handles bounds now because the symbol must be defined
5705 before for the relocation */
5706 if (tcc_state
->do_bounds_check
) {
5707 unsigned long *bounds_ptr
;
5709 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5710 /* then add global bound info */
5711 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5712 bounds_ptr
[0] = 0; /* relocated */
5713 bounds_ptr
[1] = size
;
5717 if (has_init
|| (type
->t
& VT_VLA
)) {
5718 decl_initializer(type
, sec
, addr
, 1, 0);
5719 /* restore parse state if needed */
5721 tok_str_free(init_str
.str
);
5722 restore_parse_state(&saved_parse_state
);
5724 /* patch flexible array member size back to -1, */
5725 /* for possible subsequent similar declarations */
5727 flexible_array
->type
.ref
->c
= -1;
5732 static void put_func_debug(Sym
*sym
)
5737 /* XXX: we put here a dummy type */
5738 snprintf(buf
, sizeof(buf
), "%s:%c1",
5739 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5740 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5741 cur_text_section
, sym
->c
);
5742 /* //gr gdb wants a line at the function */
5743 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5748 /* parse an old style function declaration list */
5749 /* XXX: check multiple parameter */
5750 static void func_decl_list(Sym
*func_sym
)
5757 /* parse each declaration */
5758 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5759 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5760 if (!parse_btype(&btype
, &ad
))
5761 expect("declaration list");
5762 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5763 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5765 /* we accept no variable after */
5769 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5770 /* find parameter in function parameter list */
5773 if ((s
->v
& ~SYM_FIELD
) == v
)
5777 tcc_error("declaration for parameter '%s' but no such parameter",
5778 get_tok_str(v
, NULL
));
5780 /* check that no storage specifier except 'register' was given */
5781 if (type
.t
& VT_STORAGE
)
5782 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5783 convert_parameter_type(&type
);
5784 /* we can add the type (NOTE: it could be local to the function) */
5786 /* accept other parameters */
5797 /* parse a function defined by symbol 'sym' and generate its code in
5798 'cur_text_section' */
5799 static void gen_function(Sym
*sym
)
5801 int saved_nocode_wanted
= nocode_wanted
;
5803 ind
= cur_text_section
->data_offset
;
5804 /* NOTE: we patch the symbol size later */
5805 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5806 funcname
= get_tok_str(sym
->v
, NULL
);
5808 /* Initialize VLA state */
5809 vla_sp_loc
= &vla_sp_root_loc
;
5810 vla_flags
= VLA_NEED_NEW_FRAME
;
5811 /* put debug symbol */
5812 if (tcc_state
->do_debug
)
5813 put_func_debug(sym
);
5814 /* push a dummy symbol to enable local sym storage */
5815 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5816 gfunc_prolog(&sym
->type
);
5817 #ifdef CONFIG_TCC_BCHECK
5818 if (tcc_state
->do_bounds_check
5819 && !strcmp(get_tok_str(sym
->v
, NULL
), "main")) {
5823 for (i
= 0, sym
= local_stack
; i
< 2; i
++, sym
= sym
->prev
) {
5824 if (sym
->v
& SYM_FIELD
|| sym
->prev
->v
& SYM_FIELD
)
5826 vpush_global_sym(&func_old_type
, TOK___bound_main_arg
);
5827 vset(&sym
->type
, sym
->r
, sym
->c
);
5833 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5836 cur_text_section
->data_offset
= ind
;
5837 label_pop(&global_label_stack
, NULL
);
5838 /* reset local stack */
5839 scope_stack_bottom
= NULL
;
5840 sym_pop(&local_stack
, NULL
);
5841 /* end of function */
5842 /* patch symbol size */
5843 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5845 /* patch symbol weakness (this definition overrules any prototype) */
5846 if (sym
->type
.t
& VT_WEAK
)
5848 apply_visibility(sym
, &sym
->type
);
5849 if (tcc_state
->do_debug
) {
5850 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5852 /* It's better to crash than to generate wrong code */
5853 cur_text_section
= NULL
;
5854 funcname
= ""; /* for safety */
5855 func_vt
.t
= VT_VOID
; /* for safety */
5856 func_var
= 0; /* for safety */
5857 ind
= 0; /* for safety */
5858 nocode_wanted
= saved_nocode_wanted
;
5861 ST_FUNC
void gen_inline_functions(void)
5864 int *str
, inline_generated
, i
;
5865 struct InlineFunc
*fn
;
5867 /* iterate while inline function are referenced */
5869 inline_generated
= 0;
5870 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5871 fn
= tcc_state
->inline_fns
[i
];
5873 if (sym
&& sym
->c
) {
5874 /* the function was used: generate its code and
5875 convert it to a normal function */
5876 str
= fn
->token_str
;
5879 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5880 sym
->r
= VT_SYM
| VT_CONST
;
5881 sym
->type
.t
&= ~VT_INLINE
;
5885 cur_text_section
= text_section
;
5887 macro_ptr
= NULL
; /* fail safe */
5889 inline_generated
= 1;
5892 if (!inline_generated
)
5895 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5896 fn
= tcc_state
->inline_fns
[i
];
5897 str
= fn
->token_str
;
5900 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5903 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5904 static int decl0(int l
, int is_for_loop_init
)
5912 if (!parse_btype(&btype
, &ad
)) {
5913 if (is_for_loop_init
)
5915 /* skip redundant ';' */
5916 /* XXX: find more elegant solution */
5921 if (l
== VT_CONST
&&
5922 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5923 /* global asm block */
5927 /* special test for old K&R protos without explicit int
5928 type. Only accepted when defining global data */
5929 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5933 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5934 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5936 /* we accept no variable after */
5940 while (1) { /* iterate thru each declaration */
5941 char *asm_label
; // associated asm label
5943 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5947 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5948 printf("type = '%s'\n", buf
);
5951 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5952 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5953 tcc_error("function without file scope cannot be static");
5955 /* if old style function prototype, we accept a
5958 if (sym
->c
== FUNC_OLD
)
5959 func_decl_list(sym
);
5963 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5966 asm_label_instr(&astr
);
5967 asm_label
= tcc_strdup(astr
.data
);
5970 /* parse one last attribute list, after asm label */
5971 parse_attribute(&ad
);
5976 #ifdef TCC_TARGET_PE
5977 if (ad
.a
.func_import
)
5978 type
.t
|= VT_IMPORT
;
5979 if (ad
.a
.func_export
)
5980 type
.t
|= VT_EXPORT
;
5982 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
5986 tcc_error("cannot use local functions");
5987 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5988 expect("function definition");
5990 /* reject abstract declarators in function definition */
5992 while ((sym
= sym
->next
) != NULL
)
5993 if (!(sym
->v
& ~SYM_FIELD
))
5994 expect("identifier");
5996 /* XXX: cannot do better now: convert extern line to static inline */
5997 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5998 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6003 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6006 ref
= sym
->type
.ref
;
6007 if (0 == ref
->a
.func_proto
)
6008 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6010 /* use func_call from prototype if not defined */
6011 if (ref
->a
.func_call
!= FUNC_CDECL
6012 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6013 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6015 /* use export from prototype */
6016 if (ref
->a
.func_export
)
6017 type
.ref
->a
.func_export
= 1;
6019 /* use static from prototype */
6020 if (sym
->type
.t
& VT_STATIC
)
6021 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6023 /* If the definition has no visibility use the
6024 one from prototype. */
6025 if (! (type
.t
& VT_VIS_MASK
))
6026 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6028 if (!is_compatible_types(&sym
->type
, &type
)) {
6030 tcc_error("incompatible types for redefinition of '%s'",
6031 get_tok_str(v
, NULL
));
6033 type
.ref
->a
.func_proto
= 0;
6034 /* if symbol is already defined, then put complete type */
6037 /* put function symbol */
6038 sym
= global_identifier_push(v
, type
.t
, 0);
6039 sym
->type
.ref
= type
.ref
;
6042 /* static inline functions are just recorded as a kind
6043 of macro. Their code will be emitted at the end of
6044 the compilation unit only if they are used */
6045 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6046 (VT_INLINE
| VT_STATIC
)) {
6047 TokenString func_str
;
6049 struct InlineFunc
*fn
;
6050 const char *filename
;
6052 tok_str_new(&func_str
);
6058 tcc_error("unexpected end of file");
6059 tok_str_add_tok(&func_str
);
6064 } else if (t
== '}') {
6066 if (block_level
== 0)
6070 tok_str_add(&func_str
, -1);
6071 tok_str_add(&func_str
, 0);
6072 filename
= file
? file
->filename
: "";
6073 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6074 strcpy(fn
->filename
, filename
);
6076 fn
->token_str
= func_str
.str
;
6077 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6080 /* compute text section */
6081 cur_text_section
= ad
.section
;
6082 if (!cur_text_section
)
6083 cur_text_section
= text_section
;
6084 sym
->r
= VT_SYM
| VT_CONST
;
6089 if (btype
.t
& VT_TYPEDEF
) {
6090 /* save typedefed type */
6091 /* XXX: test storage specifiers ? */
6092 sym
= sym_push(v
, &type
, 0, 0);
6094 sym
->type
.t
|= VT_TYPEDEF
;
6097 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6098 /* external function definition */
6099 /* specific case for func_call attribute */
6100 ad
.a
.func_proto
= 1;
6102 } else if (!(type
.t
& VT_ARRAY
)) {
6103 /* not lvalue if array */
6104 r
|= lvalue_type(type
.t
);
6106 has_init
= (tok
== '=');
6107 if (has_init
&& (type
.t
& VT_VLA
))
6108 tcc_error("Variable length array cannot be initialized");
6109 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6110 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6111 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6112 /* external variable or function */
6113 /* NOTE: as GCC, uninitialized global static
6114 arrays of null size are considered as
6116 sym
= external_sym(v
, &type
, r
, asm_label
);
6118 if (ad
.alias_target
) {
6123 alias_target
= sym_find(ad
.alias_target
);
6124 if (!alias_target
|| !alias_target
->c
)
6125 tcc_error("unsupported forward __alias__ attribute");
6126 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6127 tsec
.sh_num
= esym
->st_shndx
;
6128 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6131 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6132 if (type
.t
& VT_STATIC
)
6138 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
6142 if (is_for_loop_init
)
6155 ST_FUNC
void decl(int l
)