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 ST_FUNC
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 ST_FUNC
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
) {
2535 int ret_nregs
, ret_align
;
2536 ret_nregs
= gfunc_sret(&vtop
->type
, func_var
, &ret
.type
, &ret_align
);
2540 vtop
[0].type
= ret
.type
;
2541 vtop
[-1].type
= ret
.type
;
2545 size
= type_size(&vtop
->type
, &align
);
2546 #ifndef TCC_TARGET_X86_64
2549 vtop
->type
.t
= VT_PTR
;
2552 /* address of memcpy() */
2553 # ifdef TCC_ARM_EABI
2555 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2556 else if(!(align
& 3))
2557 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2560 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2565 vtop
->type
.t
= VT_PTR
;
2573 vtop
->type
.t
= VT_PTR
;
2577 vtop
->type
.t
= VT_PTR
;
2581 struct_copy(&vtop
[-2], &vtop
[-1], &vtop
[0]);
2589 /* leave source on stack */
2590 } else if (ft
& VT_BITFIELD
) {
2591 /* bitfield store handling */
2592 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2593 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2594 /* remove bit field info to avoid loops */
2595 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2596 /* duplicate source into other register */
2597 if(dbt
== VT_BOOL
) {
2598 gen_cast(&vtop
[-1].type
);
2599 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2602 /* duplicate destination */
2604 vtop
[-1] = vtop
[-2];
2606 /* mask and shift source */
2607 if(dbt
!= VT_BOOL
) {
2608 if(dbt
== VT_LLONG
) {
2609 vpushll((1ULL << bit_size
) - 1ULL);
2611 vpushi((1 << bit_size
) - 1);
2617 /* load destination, mask and or with source */
2619 if(dbt
== VT_LLONG
) {
2620 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2622 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2629 #ifdef CONFIG_TCC_BCHECK
2630 /* bound check case */
2631 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2637 if (!nocode_wanted
) {
2641 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2642 vtop
->r
|= delayed_cast
;
2646 /* post defines POST/PRE add. c is the token ++ or -- */
2647 ST_FUNC
void inc(int post
, int c
)
2650 vdup(); /* save lvalue */
2652 gv_dup(); /* duplicate value */
2657 vpushi(c
- TOK_MID
);
2659 vstore(); /* store value */
2661 vpop(); /* if post op, return saved value */
2664 /* Parse GNUC __attribute__ extension. Currently, the following
2665 extensions are recognized:
2666 - aligned(n) : set data/function alignment.
2667 - packed : force data alignment to 1
2668 - section(x) : generate data/code in this section.
2669 - unused : currently ignored, but may be used someday.
2670 - regparm(n) : pass function parameters in registers (i386 only)
2672 static void parse_attribute(AttributeDef
*ad
)
2676 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2680 while (tok
!= ')') {
2681 if (tok
< TOK_IDENT
)
2682 expect("attribute name");
2690 expect("section name");
2691 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2699 expect("alias(\"target\")");
2700 ad
->alias_target
= /* save string as token, for later */
2701 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2705 case TOK_VISIBILITY1
:
2706 case TOK_VISIBILITY2
:
2709 expect("visibility(\"default|hidden|internal|protected\")");
2710 if (!strcmp (tokc
.cstr
->data
, "default"))
2711 ad
->a
.visibility
= STV_DEFAULT
;
2712 else if (!strcmp (tokc
.cstr
->data
, "hidden"))
2713 ad
->a
.visibility
= STV_HIDDEN
;
2714 else if (!strcmp (tokc
.cstr
->data
, "internal"))
2715 ad
->a
.visibility
= STV_INTERNAL
;
2716 else if (!strcmp (tokc
.cstr
->data
, "protected"))
2717 ad
->a
.visibility
= STV_PROTECTED
;
2719 expect("visibility(\"default|hidden|internal|protected\")");
2728 if (n
<= 0 || (n
& (n
- 1)) != 0)
2729 tcc_error("alignment must be a positive power of two");
2746 /* currently, no need to handle it because tcc does not
2747 track unused objects */
2751 /* currently, no need to handle it because tcc does not
2752 track unused objects */
2757 ad
->a
.func_call
= FUNC_CDECL
;
2762 ad
->a
.func_call
= FUNC_STDCALL
;
2764 #ifdef TCC_TARGET_I386
2774 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
2780 ad
->a
.func_call
= FUNC_FASTCALLW
;
2787 ad
->a
.mode
= VT_LLONG
+ 1;
2790 ad
->a
.mode
= VT_SHORT
+ 1;
2793 ad
->a
.mode
= VT_INT
+ 1;
2796 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2803 ad
->a
.func_export
= 1;
2806 ad
->a
.func_import
= 1;
2809 if (tcc_state
->warn_unsupported
)
2810 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2811 /* skip parameters */
2813 int parenthesis
= 0;
2817 else if (tok
== ')')
2820 } while (parenthesis
&& tok
!= -1);
2833 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2834 static void struct_decl(CType
*type
, int u
, int tdef
)
2836 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
;
2837 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2838 Sym
*s
, *ss
, *ass
, **ps
;
2842 a
= tok
; /* save decl type */
2847 /* struct already defined ? return it */
2849 expect("struct/union/enum name");
2853 tcc_error("invalid type");
2855 } else if (tok
>= TOK_IDENT
&& !tdef
)
2856 tcc_error("unknown struct/union/enum");
2862 /* we put an undefined size for struct/union */
2863 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2864 s
->r
= 0; /* default alignment is zero as gcc */
2865 /* put struct/union/enum name in type */
2873 tcc_error("struct/union/enum already defined");
2874 /* cannot be empty */
2876 /* non empty enums are not allowed */
2877 if (a
== TOK_ENUM
) {
2881 expect("identifier");
2883 if (ss
&& !local_stack
)
2884 tcc_error("redefinition of enumerator '%s'",
2885 get_tok_str(v
, NULL
));
2891 /* enum symbols have static storage */
2892 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2893 ss
->type
.t
|= VT_STATIC
;
2898 /* NOTE: we accept a trailing comma */
2902 s
->c
= type_size(&int_type
, &align
);
2911 while (tok
!= '}') {
2912 parse_btype(&btype
, &ad
);
2915 tcc_error("flexible array member '%s' not at the end of struct",
2916 get_tok_str(v
, NULL
));
2921 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2922 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2923 expect("identifier");
2924 if (type_size(&type1
, &align
) < 0) {
2925 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
2928 tcc_error("field '%s' has incomplete type",
2929 get_tok_str(v
, NULL
));
2931 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2932 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2933 tcc_error("invalid type for '%s'",
2934 get_tok_str(v
, NULL
));
2938 bit_size
= expr_const();
2939 /* XXX: handle v = 0 case for messages */
2941 tcc_error("negative width in bit-field '%s'",
2942 get_tok_str(v
, NULL
));
2943 if (v
&& bit_size
== 0)
2944 tcc_error("zero width for bit-field '%s'",
2945 get_tok_str(v
, NULL
));
2947 size
= type_size(&type1
, &align
);
2949 if (align
< ad
.a
.aligned
)
2950 align
= ad
.a
.aligned
;
2951 } else if (ad
.a
.packed
) {
2953 } else if (*tcc_state
->pack_stack_ptr
) {
2954 if (align
> *tcc_state
->pack_stack_ptr
)
2955 align
= *tcc_state
->pack_stack_ptr
;
2958 if (bit_size
>= 0) {
2959 bt
= type1
.t
& VT_BTYPE
;
2966 tcc_error("bitfields must have scalar type");
2968 if (bit_size
> bsize
) {
2969 tcc_error("width of '%s' exceeds its type",
2970 get_tok_str(v
, NULL
));
2971 } else if (bit_size
== bsize
) {
2972 /* no need for bit fields */
2974 } else if (bit_size
== 0) {
2975 /* XXX: what to do if only padding in a
2977 /* zero size: means to pad */
2980 /* we do not have enough room ?
2981 did the type change?
2983 if ((bit_pos
+ bit_size
) > bsize
||
2984 bt
!= prevbt
|| a
== TOK_UNION
)
2987 /* XXX: handle LSB first */
2988 type1
.t
|= VT_BITFIELD
|
2989 (bit_pos
<< VT_STRUCT_SHIFT
) |
2990 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2991 bit_pos
+= bit_size
;
2997 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2998 /* add new memory data only if starting
3000 if (lbit_pos
== 0) {
3001 if (a
== TOK_STRUCT
) {
3002 c
= (c
+ align
- 1) & -align
;
3011 if (align
> maxalign
)
3015 printf("add field %s offset=%d",
3016 get_tok_str(v
, NULL
), offset
);
3017 if (type1
.t
& VT_BITFIELD
) {
3018 printf(" pos=%d size=%d",
3019 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3020 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3025 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3027 while ((ass
= ass
->next
) != NULL
) {
3028 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3033 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3037 if (tok
== ';' || tok
== TOK_EOF
)
3044 /* store size and alignment */
3045 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3051 /* return 1 if basic type is a type size (short, long, long long) */
3052 ST_FUNC
int is_btype_size(int bt
)
3054 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3057 /* return 0 if no type declaration. otherwise, return the basic type
3060 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3062 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3066 memset(ad
, 0, sizeof(AttributeDef
));
3074 /* currently, we really ignore extension */
3085 tcc_error("too many basic types");
3087 bt_size
= is_btype_size (u
& VT_BTYPE
);
3088 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3103 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3104 #ifndef TCC_TARGET_PE
3105 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3107 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3108 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3122 if ((t
& VT_BTYPE
) == VT_LONG
) {
3123 #ifdef TCC_TARGET_PE
3124 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3126 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3134 struct_decl(&type1
, VT_ENUM
, t
& VT_TYPEDEF
);
3137 type
->ref
= type1
.ref
;
3141 struct_decl(&type1
, VT_STRUCT
, t
& VT_TYPEDEF
);
3144 /* type modifiers */
3160 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3161 tcc_error("signed and unsigned modifier");
3174 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3175 tcc_error("signed and unsigned modifier");
3176 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3201 /* GNUC attribute */
3202 case TOK_ATTRIBUTE1
:
3203 case TOK_ATTRIBUTE2
:
3204 parse_attribute(ad
);
3207 t
= (t
& ~VT_BTYPE
) | u
;
3215 parse_expr_type(&type1
);
3216 /* remove all storage modifiers except typedef */
3217 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3223 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3225 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3226 type
->ref
= s
->type
.ref
;
3228 /* get attributes from typedef */
3229 if (0 == ad
->a
.aligned
)
3230 ad
->a
.aligned
= s
->a
.aligned
;
3231 if (0 == ad
->a
.func_call
)
3232 ad
->a
.func_call
= s
->a
.func_call
;
3233 ad
->a
.packed
|= s
->a
.packed
;
3242 if (tcc_state
->char_is_unsigned
) {
3243 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3247 /* long is never used as type */
3248 if ((t
& VT_BTYPE
) == VT_LONG
)
3249 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3250 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3252 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3258 /* convert a function parameter type (array to pointer and function to
3259 function pointer) */
3260 static inline void convert_parameter_type(CType
*pt
)
3262 /* remove const and volatile qualifiers (XXX: const could be used
3263 to indicate a const function parameter */
3264 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3265 /* array must be transformed to pointer according to ANSI C */
3267 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3272 ST_FUNC
void parse_asm_str(CString
*astr
)
3275 /* read the string */
3277 expect("string constant");
3279 while (tok
== TOK_STR
) {
3280 /* XXX: add \0 handling too ? */
3281 cstr_cat(astr
, tokc
.cstr
->data
);
3284 cstr_ccat(astr
, '\0');
3287 /* Parse an asm label and return the label
3288 * Don't forget to free the CString in the caller! */
3289 static void asm_label_instr(CString
*astr
)
3292 parse_asm_str(astr
);
3295 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3299 static void post_type(CType
*type
, AttributeDef
*ad
)
3301 int n
, l
, t1
, arg_size
, align
;
3302 Sym
**plast
, *s
, *first
;
3307 /* function declaration */
3315 /* read param name and compute offset */
3316 if (l
!= FUNC_OLD
) {
3317 if (!parse_btype(&pt
, &ad1
)) {
3319 tcc_error("invalid type");
3326 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3328 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3329 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3330 tcc_error("parameter declared as void");
3331 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3336 expect("identifier");
3340 convert_parameter_type(&pt
);
3341 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3347 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3354 /* if no parameters, then old type prototype */
3358 /* NOTE: const is ignored in returned type as it has a special
3359 meaning in gcc / C++ */
3360 type
->t
&= ~VT_CONSTANT
;
3361 /* some ancient pre-K&R C allows a function to return an array
3362 and the array brackets to be put after the arguments, such
3363 that "int c()[]" means something like "int[] c()" */
3366 skip(']'); /* only handle simple "[]" */
3369 /* we push a anonymous symbol which will contain the function prototype */
3370 ad
->a
.func_args
= arg_size
;
3371 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3376 } else if (tok
== '[') {
3377 /* array definition */
3379 if (tok
== TOK_RESTRICT1
)
3384 if (!local_stack
|| nocode_wanted
)
3385 vpushi(expr_const());
3387 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3390 tcc_error("invalid array size");
3392 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3393 tcc_error("size of variable length array should be an integer");
3398 /* parse next post type */
3399 post_type(type
, ad
);
3400 if (type
->t
== VT_FUNC
)
3401 tcc_error("declaration of an array of functions");
3402 t1
|= type
->t
& VT_VLA
;
3405 loc
-= type_size(&int_type
, &align
);
3409 vla_runtime_type_size(type
, &align
);
3411 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3418 /* we push an anonymous symbol which will contain the array
3420 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3421 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3426 /* Parse a type declaration (except basic type), and return the type
3427 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3428 expected. 'type' should contain the basic type. 'ad' is the
3429 attribute definition of the basic type. It can be modified by
3432 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3435 CType type1
, *type2
;
3436 int qualifiers
, storage
;
3438 while (tok
== '*') {
3446 qualifiers
|= VT_CONSTANT
;
3451 qualifiers
|= VT_VOLATILE
;
3459 type
->t
|= qualifiers
;
3462 /* XXX: clarify attribute handling */
3463 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3464 parse_attribute(ad
);
3466 /* recursive type */
3467 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3468 type1
.t
= 0; /* XXX: same as int */
3471 /* XXX: this is not correct to modify 'ad' at this point, but
3472 the syntax is not clear */
3473 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3474 parse_attribute(ad
);
3475 type_decl(&type1
, ad
, v
, td
);
3478 /* type identifier */
3479 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3483 if (!(td
& TYPE_ABSTRACT
))
3484 expect("identifier");
3488 storage
= type
->t
& VT_STORAGE
;
3489 type
->t
&= ~VT_STORAGE
;
3490 if (storage
& VT_STATIC
) {
3491 int saved_nocode_wanted
= nocode_wanted
;
3493 post_type(type
, ad
);
3494 nocode_wanted
= saved_nocode_wanted
;
3496 post_type(type
, ad
);
3498 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3499 parse_attribute(ad
);
3503 /* append type at the end of type1 */
3516 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3517 ST_FUNC
int lvalue_type(int t
)
3522 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3524 else if (bt
== VT_SHORT
)
3528 if (t
& VT_UNSIGNED
)
3529 r
|= VT_LVAL_UNSIGNED
;
3533 /* indirection with full error checking and bound check */
3534 ST_FUNC
void indir(void)
3536 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3537 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3541 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3543 vtop
->type
= *pointed_type(&vtop
->type
);
3544 /* Arrays and functions are never lvalues */
3545 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3546 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3547 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3548 /* if bound checking, the referenced pointer must be checked */
3549 #ifdef CONFIG_TCC_BCHECK
3550 if (tcc_state
->do_bounds_check
)
3551 vtop
->r
|= VT_MUSTBOUND
;
3556 /* pass a parameter to a function and do type checking and casting */
3557 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3562 func_type
= func
->c
;
3563 if (func_type
== FUNC_OLD
||
3564 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3565 /* default casting : only need to convert float to double */
3566 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3569 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3570 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3573 } else if (arg
== NULL
) {
3574 tcc_error("too many arguments to function");
3577 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3578 gen_assign_cast(&type
);
3582 /* parse an expression of the form '(type)' or '(expr)' and return its
3584 static void parse_expr_type(CType
*type
)
3590 if (parse_btype(type
, &ad
)) {
3591 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3598 static void parse_type(CType
*type
)
3603 if (!parse_btype(type
, &ad
)) {
3606 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3609 static void vpush_tokc(int t
)
3614 vsetc(&type
, VT_CONST
, &tokc
);
3617 ST_FUNC
void unary(void)
3619 int n
, t
, align
, size
, r
, sizeof_caller
;
3623 static int in_sizeof
= 0;
3625 sizeof_caller
= in_sizeof
;
3627 /* XXX: GCC 2.95.3 does not generate a table although it should be
3641 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3645 vpush_tokc(VT_LLONG
);
3649 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3653 vpush_tokc(VT_FLOAT
);
3657 vpush_tokc(VT_DOUBLE
);
3661 vpush_tokc(VT_LDOUBLE
);
3664 case TOK___FUNCTION__
:
3666 goto tok_identifier
;
3672 /* special function name identifier */
3673 len
= strlen(funcname
) + 1;
3674 /* generate char[len] type */
3679 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3680 ptr
= section_ptr_add(data_section
, len
);
3681 memcpy(ptr
, funcname
, len
);
3686 #ifdef TCC_TARGET_PE
3687 t
= VT_SHORT
| VT_UNSIGNED
;
3693 /* string parsing */
3696 if (tcc_state
->warn_write_strings
)
3701 memset(&ad
, 0, sizeof(AttributeDef
));
3702 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3707 if (parse_btype(&type
, &ad
)) {
3708 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3710 /* check ISOC99 compound literal */
3712 /* data is allocated locally by default */
3717 /* all except arrays are lvalues */
3718 if (!(type
.t
& VT_ARRAY
))
3719 r
|= lvalue_type(type
.t
);
3720 memset(&ad
, 0, sizeof(AttributeDef
));
3721 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3723 if (sizeof_caller
) {
3730 } else if (tok
== '{') {
3731 /* save all registers */
3733 /* statement expression : we do not accept break/continue
3734 inside as GCC does */
3735 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3750 /* functions names must be treated as function pointers,
3751 except for unary '&' and sizeof. Since we consider that
3752 functions are not lvalues, we only have to handle it
3753 there and in function calls. */
3754 /* arrays can also be used although they are not lvalues */
3755 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3756 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3758 mk_pointer(&vtop
->type
);
3764 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3766 boolean
.t
= VT_BOOL
;
3768 vtop
->c
.i
= !vtop
->c
.i
;
3769 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3770 vtop
->c
.i
= vtop
->c
.i
^ 1;
3773 vseti(VT_JMP
, gtst(1, 0));
3785 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3786 tcc_error("pointer not accepted for unary plus");
3787 /* In order to force cast, we add zero, except for floating point
3788 where we really need an noop (otherwise -0.0 will be transformed
3790 if (!is_float(vtop
->type
.t
)) {
3801 unary_type(&type
); // Perform a in_sizeof = 0;
3802 size
= type_size(&type
, &align
);
3803 if (t
== TOK_SIZEOF
) {
3804 if (!(type
.t
& VT_VLA
)) {
3806 tcc_error("sizeof applied to an incomplete type");
3809 vla_runtime_type_size(&type
, &align
);
3814 vtop
->type
.t
|= VT_UNSIGNED
;
3817 case TOK_builtin_types_compatible_p
:
3826 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3827 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3828 vpushi(is_compatible_types(&type1
, &type2
));
3831 case TOK_builtin_constant_p
:
3833 int saved_nocode_wanted
, res
;
3836 saved_nocode_wanted
= nocode_wanted
;
3839 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3841 nocode_wanted
= saved_nocode_wanted
;
3846 case TOK_builtin_frame_address
:
3852 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3853 tcc_error("__builtin_frame_address only takes positive integers");
3860 vset(&type
, VT_LOCAL
, 0); /* local frame */
3862 mk_pointer(&vtop
->type
);
3863 indir(); /* -> parent frame */
3867 #ifdef TCC_TARGET_X86_64
3868 #ifdef TCC_TARGET_PE
3869 case TOK_builtin_va_start
:
3877 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
3878 tcc_error("__builtin_va_start expects a local variable");
3879 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
3880 vtop
->type
= char_pointer_type
;
3885 case TOK_builtin_va_arg_types
:
3892 vpushi(classify_x86_64_va_arg(&type
));
3907 t
= vtop
->type
.t
& VT_BTYPE
;
3909 /* In IEEE negate(x) isn't subtract(0,x), but rather
3914 else if (t
== VT_DOUBLE
)
3925 goto tok_identifier
;
3927 /* allow to take the address of a label */
3928 if (tok
< TOK_UIDENT
)
3929 expect("label identifier");
3930 s
= label_find(tok
);
3932 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3934 if (s
->r
== LABEL_DECLARED
)
3935 s
->r
= LABEL_FORWARD
;
3938 s
->type
.t
= VT_VOID
;
3939 mk_pointer(&s
->type
);
3940 s
->type
.t
|= VT_STATIC
;
3942 vpushsym(&s
->type
, s
);
3946 // special qnan , snan and infinity values
3948 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3952 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3956 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3965 expect("identifier");
3968 const char *name
= get_tok_str(t
, NULL
);
3970 tcc_error("'%s' undeclared", name
);
3971 /* for simple function calls, we tolerate undeclared
3972 external reference to int() function */
3973 if (tcc_state
->warn_implicit_function_declaration
3974 #ifdef TCC_TARGET_PE
3975 /* people must be warned about using undeclared WINAPI functions
3976 (which usually start with uppercase letter) */
3977 || (name
[0] >= 'A' && name
[0] <= 'Z')
3980 tcc_warning("implicit declaration of function '%s'", name
);
3981 s
= external_global_sym(t
, &func_old_type
, 0);
3983 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3984 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3985 /* if referencing an inline function, then we generate a
3986 symbol to it if not already done. It will have the
3987 effect to generate code for it at the end of the
3988 compilation unit. Inline function as always
3989 generated in the text section. */
3991 put_extern_sym(s
, text_section
, 0, 0);
3992 r
= VT_SYM
| VT_CONST
;
3996 vset(&s
->type
, r
, s
->c
);
3997 /* if forward reference, we must point to s */
3998 if (vtop
->r
& VT_SYM
) {
4000 vtop
->c
.ptr_offset
= 0;
4005 /* post operations */
4007 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4010 } else if (tok
== '.' || tok
== TOK_ARROW
) {
4013 if (tok
== TOK_ARROW
)
4015 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4019 /* expect pointer on structure */
4020 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4021 expect("struct or union");
4025 while ((s
= s
->next
) != NULL
) {
4030 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
4031 /* add field offset to pointer */
4032 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4035 /* change type to field type, and set to lvalue */
4036 vtop
->type
= s
->type
;
4037 vtop
->type
.t
|= qualifiers
;
4038 /* an array is never an lvalue */
4039 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4040 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4041 #ifdef CONFIG_TCC_BCHECK
4042 /* if bound checking, the referenced pointer must be checked */
4043 if (tcc_state
->do_bounds_check
)
4044 vtop
->r
|= VT_MUSTBOUND
;
4048 } else if (tok
== '[') {
4054 } else if (tok
== '(') {
4057 int nb_args
, ret_nregs
, ret_align
, variadic
;
4060 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4061 /* pointer test (no array accepted) */
4062 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4063 vtop
->type
= *pointed_type(&vtop
->type
);
4064 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4068 expect("function pointer");
4071 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4073 /* get return type */
4076 sa
= s
->next
; /* first parameter */
4079 /* compute first implicit argument if a structure is returned */
4080 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4081 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4082 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4085 /* get some space for the returned structure */
4086 size
= type_size(&s
->type
, &align
);
4087 loc
= (loc
- size
) & -align
;
4089 ret
.r
= VT_LOCAL
| VT_LVAL
;
4090 /* pass it as 'int' to avoid structure arg passing
4092 vseti(VT_LOCAL
, loc
);
4102 /* return in register */
4103 if (is_float(ret
.type
.t
)) {
4104 ret
.r
= reg_fret(ret
.type
.t
);
4105 #ifdef TCC_TARGET_X86_64
4106 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4110 #ifdef TCC_TARGET_X86_64
4111 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4113 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4123 gfunc_param_typed(s
, sa
);
4133 tcc_error("too few arguments to function");
4135 if (!nocode_wanted
) {
4136 gfunc_call(nb_args
);
4138 vtop
-= (nb_args
+ 1);
4142 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4143 vsetc(&ret
.type
, r
, &ret
.c
);
4144 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4147 /* handle packed struct return */
4148 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4151 size
= type_size(&s
->type
, &align
);
4152 loc
= (loc
- size
) & -align
;
4156 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4160 if (--ret_nregs
== 0)
4162 /* XXX: compatible with arm only: ret_align == register_size */
4163 offset
+= ret_align
;
4165 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4173 ST_FUNC
void expr_prod(void)
4178 while (tok
== '*' || tok
== '/' || tok
== '%') {
4186 ST_FUNC
void expr_sum(void)
4191 while (tok
== '+' || tok
== '-') {
4199 static void expr_shift(void)
4204 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4212 static void expr_cmp(void)
4217 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4218 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4226 static void expr_cmpeq(void)
4231 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4239 static void expr_and(void)
4242 while (tok
== '&') {
4249 static void expr_xor(void)
4252 while (tok
== '^') {
4259 static void expr_or(void)
4262 while (tok
== '|') {
4269 /* XXX: fix this mess */
4270 static void expr_land_const(void)
4273 while (tok
== TOK_LAND
) {
4280 /* XXX: fix this mess */
4281 static void expr_lor_const(void)
4284 while (tok
== TOK_LOR
) {
4291 /* only used if non constant */
4292 static void expr_land(void)
4297 if (tok
== TOK_LAND
) {
4302 if (tok
!= TOK_LAND
) {
4312 static void expr_lor(void)
4317 if (tok
== TOK_LOR
) {
4322 if (tok
!= TOK_LOR
) {
4332 /* XXX: better constant handling */
4333 static void expr_cond(void)
4335 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4337 CType type
, type1
, type2
;
4344 boolean
.t
= VT_BOOL
;
4350 if (tok
!= ':' || !gnu_ext
) {
4365 if (vtop
!= vstack
) {
4366 /* needed to avoid having different registers saved in
4368 if (is_float(vtop
->type
.t
)) {
4370 #ifdef TCC_TARGET_X86_64
4371 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4381 if (tok
== ':' && gnu_ext
) {
4389 sv
= *vtop
; /* save value to handle it later */
4390 vtop
--; /* no vpop so that FP stack is not flushed */
4398 bt1
= t1
& VT_BTYPE
;
4400 bt2
= t2
& VT_BTYPE
;
4401 /* cast operands to correct type according to ISOC rules */
4402 if (is_float(bt1
) || is_float(bt2
)) {
4403 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4404 type
.t
= VT_LDOUBLE
;
4405 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4410 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4411 /* cast to biggest op */
4413 /* convert to unsigned if it does not fit in a long long */
4414 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4415 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4416 type
.t
|= VT_UNSIGNED
;
4417 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4418 /* If one is a null ptr constant the result type
4420 if (is_null_pointer (vtop
))
4422 else if (is_null_pointer (&sv
))
4424 /* XXX: test pointer compatibility, C99 has more elaborate
4428 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4429 /* XXX: test function pointer compatibility */
4430 type
= bt1
== VT_FUNC
? type1
: type2
;
4431 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4432 /* XXX: test structure compatibility */
4433 type
= bt1
== VT_STRUCT
? type1
: type2
;
4434 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4435 /* NOTE: as an extension, we accept void on only one side */
4438 /* integer operations */
4440 /* convert to unsigned if it does not fit in an integer */
4441 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4442 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4443 type
.t
|= VT_UNSIGNED
;
4446 /* now we convert second operand */
4448 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4451 if (is_float(type
.t
)) {
4453 #ifdef TCC_TARGET_X86_64
4454 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4458 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4459 /* for long longs, we use fixed registers to avoid having
4460 to handle a complicated move */
4465 /* this is horrible, but we must also convert first
4469 /* put again first value and cast it */
4472 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4475 move_reg(r2
, r1
, type
.t
);
4482 static void expr_eq(void)
4488 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4489 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4490 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4505 ST_FUNC
void gexpr(void)
4516 /* parse an expression and return its type without any side effect. */
4517 static void expr_type(CType
*type
)
4519 int saved_nocode_wanted
;
4521 saved_nocode_wanted
= nocode_wanted
;
4526 nocode_wanted
= saved_nocode_wanted
;
4529 /* parse a unary expression and return its type without any side
4531 static void unary_type(CType
*type
)
4543 /* parse a constant expression and return value in vtop. */
4544 static void expr_const1(void)
4553 /* parse an integer constant and return its value. */
4554 ST_FUNC
int expr_const(void)
4558 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4559 expect("constant expression");
4565 /* return the label token if current token is a label, otherwise
4567 static int is_label(void)
4571 /* fast test first */
4572 if (tok
< TOK_UIDENT
)
4574 /* no need to save tokc because tok is an identifier */
4581 unget_tok(last_tok
);
4586 static void label_or_decl(int l
)
4590 /* fast test first */
4591 if (tok
>= TOK_UIDENT
)
4593 /* no need to save tokc because tok is an identifier */
4597 unget_tok(last_tok
);
4600 unget_tok(last_tok
);
4605 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4606 int case_reg
, int is_expr
)
4609 Sym
*s
, *frame_bottom
;
4611 /* generate line number info */
4612 if (tcc_state
->do_debug
&&
4613 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4614 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4616 last_line_num
= file
->line_num
;
4620 /* default return value is (void) */
4622 vtop
->type
.t
= VT_VOID
;
4625 if (tok
== TOK_IF
) {
4632 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4634 if (c
== TOK_ELSE
) {
4638 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4639 gsym(d
); /* patch else jmp */
4642 } else if (tok
== TOK_WHILE
) {
4650 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4654 } else if (tok
== '{') {
4656 int block_vla_sp_loc
, *saved_vla_sp_loc
, saved_vla_flags
;
4659 /* record local declaration stack position */
4661 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4662 frame_bottom
->next
= scope_stack_bottom
;
4663 scope_stack_bottom
= frame_bottom
;
4664 llabel
= local_label_stack
;
4666 /* save VLA state */
4667 block_vla_sp_loc
= *(saved_vla_sp_loc
= vla_sp_loc
);
4668 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4669 vla_sp_loc
= &block_vla_sp_loc
;
4671 saved_vla_flags
= vla_flags
;
4672 vla_flags
|= VLA_NEED_NEW_FRAME
;
4674 /* handle local labels declarations */
4675 if (tok
== TOK_LABEL
) {
4678 if (tok
< TOK_UIDENT
)
4679 expect("label identifier");
4680 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4690 while (tok
!= '}') {
4691 label_or_decl(VT_LOCAL
);
4695 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4698 /* pop locally defined labels */
4699 label_pop(&local_label_stack
, llabel
);
4701 /* XXX: this solution makes only valgrind happy...
4702 triggered by gcc.c-torture/execute/20000917-1.c */
4704 switch(vtop
->type
.t
& VT_BTYPE
) {
4709 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4711 tcc_error("unsupported expression type");
4714 /* pop locally defined symbols */
4715 scope_stack_bottom
= scope_stack_bottom
->next
;
4716 sym_pop(&local_stack
, s
);
4718 /* Pop VLA frames and restore stack pointer if required */
4719 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4720 *saved_vla_sp_loc
= block_vla_sp_loc
;
4721 if (vla_sp_loc
!= (saved_vla_sp_loc
== &vla_sp_root_loc
? &vla_sp_root_loc
: &block_vla_sp_loc
)) {
4722 vla_sp_loc
= saved_vla_sp_loc
;
4723 gen_vla_sp_restore(*vla_sp_loc
);
4725 vla_flags
= (vla_flags
& ~VLA_SCOPE_FLAGS
) | (saved_vla_flags
& VLA_SCOPE_FLAGS
);
4728 } else if (tok
== TOK_RETURN
) {
4732 gen_assign_cast(&func_vt
);
4733 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4734 CType type
, ret_type
;
4735 int ret_align
, ret_nregs
;
4736 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
4738 if (0 == ret_nregs
) {
4739 /* if returning structure, must copy it to implicit
4740 first pointer arg location */
4743 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4746 /* copy structure value to pointer */
4749 /* returning structure packed into registers */
4750 int rc
, size
, addr
, align
;
4751 size
= type_size(&func_vt
,&align
);
4752 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& (ret_align
-1)))
4753 && (align
& (ret_align
-1))) {
4754 loc
= (loc
- size
) & -align
;
4757 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4760 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
4762 vtop
->type
= ret_type
;
4763 if (is_float(ret_type
.t
))
4764 rc
= rc_fret(ret_type
.t
);
4772 if (--ret_nregs
== 0)
4774 /* We assume that when a structure is returned in multiple
4775 registers, their classes are consecutive values of the
4778 /* XXX: compatible with arm only: ret_align == register_size */
4779 vtop
->c
.i
+= ret_align
;
4780 vtop
->r
= VT_LOCAL
| VT_LVAL
;
4783 } else if (is_float(func_vt
.t
)) {
4784 gv(rc_fret(func_vt
.t
));
4788 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4791 rsym
= gjmp(rsym
); /* jmp */
4792 } else if (tok
== TOK_BREAK
) {
4795 tcc_error("cannot break");
4796 *bsym
= gjmp(*bsym
);
4799 } else if (tok
== TOK_CONTINUE
) {
4802 tcc_error("cannot continue");
4803 *csym
= gjmp(*csym
);
4806 } else if (tok
== TOK_FOR
) {
4811 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4812 frame_bottom
->next
= scope_stack_bottom
;
4813 scope_stack_bottom
= frame_bottom
;
4815 /* c99 for-loop init decl? */
4816 if (!decl0(VT_LOCAL
, 1)) {
4817 /* no, regular for-loop init expr */
4841 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4845 scope_stack_bottom
= scope_stack_bottom
->next
;
4846 sym_pop(&local_stack
, s
);
4848 if (tok
== TOK_DO
) {
4853 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4864 if (tok
== TOK_SWITCH
) {
4868 /* XXX: other types than integer */
4869 case_reg
= gv(RC_INT
);
4873 b
= gjmp(0); /* jump to first case */
4875 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4876 /* if no default, jmp after switch */
4884 if (tok
== TOK_CASE
) {
4891 if (gnu_ext
&& tok
== TOK_DOTS
) {
4895 tcc_warning("empty case range");
4897 /* since a case is like a label, we must skip it with a jmp */
4904 *case_sym
= gtst(1, 0);
4907 *case_sym
= gtst(1, 0);
4911 *case_sym
= gtst(1, *case_sym
);
4916 goto block_after_label
;
4918 if (tok
== TOK_DEFAULT
) {
4924 tcc_error("too many 'default'");
4927 goto block_after_label
;
4929 if (tok
== TOK_GOTO
) {
4931 if (tok
== '*' && gnu_ext
) {
4935 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4938 } else if (tok
>= TOK_UIDENT
) {
4939 s
= label_find(tok
);
4940 /* put forward definition if needed */
4942 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4944 if (s
->r
== LABEL_DECLARED
)
4945 s
->r
= LABEL_FORWARD
;
4947 /* label already defined */
4948 if (vla_flags
& VLA_IN_SCOPE
) {
4949 /* If VLAs are in use, save the current stack pointer and
4950 reset the stack pointer to what it was at function entry
4951 (label will restore stack pointer in inner scopes) */
4953 gen_vla_sp_restore(vla_sp_root_loc
);
4955 if (s
->r
& LABEL_FORWARD
)
4956 s
->jnext
= gjmp(s
->jnext
);
4958 gjmp_addr(s
->jnext
);
4961 expect("label identifier");
4964 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4970 if (vla_flags
& VLA_IN_SCOPE
) {
4971 /* save/restore stack pointer across label
4972 this is a no-op when combined with the load immediately
4973 after the label unless we arrive via goto */
4978 if (s
->r
== LABEL_DEFINED
)
4979 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4981 s
->r
= LABEL_DEFINED
;
4983 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4986 if (vla_flags
& VLA_IN_SCOPE
) {
4987 gen_vla_sp_restore(*vla_sp_loc
);
4988 vla_flags
|= VLA_NEED_NEW_FRAME
;
4990 /* we accept this, but it is a mistake */
4993 tcc_warning("deprecated use of label at end of compound statement");
4997 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
5000 /* expression case */
5015 /* t is the array or struct type. c is the array or struct
5016 address. cur_index/cur_field is the pointer to the current
5017 value. 'size_only' is true if only size info is needed (only used
5019 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5020 int *cur_index
, Sym
**cur_field
,
5024 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5030 if (gnu_ext
&& (l
= is_label()) != 0)
5032 while (tok
== '[' || tok
== '.') {
5034 if (!(type
->t
& VT_ARRAY
))
5035 expect("array type");
5038 index
= expr_const();
5039 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5040 expect("invalid index");
5041 if (tok
== TOK_DOTS
&& gnu_ext
) {
5043 index_last
= expr_const();
5044 if (index_last
< 0 ||
5045 (s
->c
>= 0 && index_last
>= s
->c
) ||
5047 expect("invalid index");
5053 *cur_index
= index_last
;
5054 type
= pointed_type(type
);
5055 elem_size
= type_size(type
, &align
);
5056 c
+= index
* elem_size
;
5057 /* NOTE: we only support ranges for last designator */
5058 nb_elems
= index_last
- index
+ 1;
5059 if (nb_elems
!= 1) {
5068 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5069 expect("struct/union type");
5082 /* XXX: fix this mess by using explicit storage field */
5084 type1
.t
|= (type
->t
& ~VT_TYPE
);
5098 if (type
->t
& VT_ARRAY
) {
5100 type
= pointed_type(type
);
5101 c
+= index
* type_size(type
, &align
);
5105 tcc_error("too many field init");
5106 /* XXX: fix this mess by using explicit storage field */
5108 type1
.t
|= (type
->t
& ~VT_TYPE
);
5113 decl_initializer(type
, sec
, c
, 0, size_only
);
5115 /* XXX: make it more general */
5116 if (!size_only
&& nb_elems
> 1) {
5117 unsigned long c_end
;
5122 tcc_error("range init not supported yet for dynamic storage");
5123 c_end
= c
+ nb_elems
* elem_size
;
5124 if (c_end
> sec
->data_allocated
)
5125 section_realloc(sec
, c_end
);
5126 src
= sec
->data
+ c
;
5128 for(i
= 1; i
< nb_elems
; i
++) {
5130 memcpy(dst
, src
, elem_size
);
5136 #define EXPR_CONST 1
5139 /* store a value or an expression directly in global data or in local array */
5140 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5141 int v
, int expr_type
)
5143 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5145 unsigned long long bit_mask
;
5153 /* compound literals must be allocated globally in this case */
5154 saved_global_expr
= global_expr
;
5157 global_expr
= saved_global_expr
;
5158 /* NOTE: symbols are accepted */
5159 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5160 tcc_error("initializer element is not constant");
5168 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5171 /* XXX: not portable */
5172 /* XXX: generate error if incorrect relocation */
5173 gen_assign_cast(&dtype
);
5174 bt
= type
->t
& VT_BTYPE
;
5175 /* we'll write at most 12 bytes */
5176 if (c
+ 12 > sec
->data_allocated
) {
5177 section_realloc(sec
, c
+ 12);
5179 ptr
= sec
->data
+ c
;
5180 /* XXX: make code faster ? */
5181 if (!(type
->t
& VT_BITFIELD
)) {
5186 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5187 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5188 bit_mask
= (1LL << bit_size
) - 1;
5190 if ((vtop
->r
& VT_SYM
) &&
5196 (bt
== VT_INT
&& bit_size
!= 32)))
5197 tcc_error("initializer element is not computable at load time");
5200 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5202 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5205 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5208 *(double *)ptr
= vtop
->c
.d
;
5211 *(long double *)ptr
= vtop
->c
.ld
;
5214 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
5217 if (vtop
->r
& VT_SYM
) {
5218 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5220 *(addr_t
*)ptr
|= (vtop
->c
.ptr_offset
& bit_mask
) << bit_pos
;
5223 if (vtop
->r
& VT_SYM
) {
5224 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5226 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5231 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5238 /* put zeros for variable based init */
5239 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5242 /* nothing to do because globals are already set to zero */
5244 #ifndef TCC_TARGET_X86_64
5245 vpush_global_sym(&func_old_type
, TOK_memset
);
5247 # ifdef TCC_TARGET_ARM
5257 gen_putz(vtop
, size
);
5263 /* 't' contains the type and storage info. 'c' is the offset of the
5264 object in section 'sec'. If 'sec' is NULL, it means stack based
5265 allocation. 'first' is true if array '{' must be read (multi
5266 dimension implicit array init handling). 'size_only' is true if
5267 size only evaluation is wanted (only for arrays). */
5268 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5269 int first
, int size_only
)
5271 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5272 int size1
, align1
, expr_type
;
5276 if (type
->t
& VT_VLA
) {
5279 /* save current stack pointer */
5280 if (vla_flags
& VLA_NEED_NEW_FRAME
) {
5282 vla_flags
= VLA_IN_SCOPE
;
5283 vla_sp_loc
= &vla_sp_loc_tmp
;
5286 vla_runtime_type_size(type
, &a
);
5287 gen_vla_alloc(type
, a
);
5288 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5292 } else if (type
->t
& VT_ARRAY
) {
5296 t1
= pointed_type(type
);
5297 size1
= type_size(t1
, &align1
);
5300 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5303 tcc_error("character array initializer must be a literal,"
5304 " optionally enclosed in braces");
5309 /* only parse strings here if correct type (otherwise: handle
5310 them as ((w)char *) expressions */
5311 if ((tok
== TOK_LSTR
&&
5312 #ifdef TCC_TARGET_PE
5313 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5315 (t1
->t
& VT_BTYPE
) == VT_INT
5317 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5318 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5323 /* compute maximum number of chars wanted */
5325 cstr_len
= cstr
->size
;
5327 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5330 if (n
>= 0 && nb
> (n
- array_length
))
5331 nb
= n
- array_length
;
5334 tcc_warning("initializer-string for array is too long");
5335 /* in order to go faster for common case (char
5336 string in global variable, we handle it
5338 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5339 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5343 ch
= ((unsigned char *)cstr
->data
)[i
];
5345 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5346 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5354 /* only add trailing zero if enough storage (no
5355 warning in this case since it is standard) */
5356 if (n
< 0 || array_length
< n
) {
5358 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5364 while (tok
!= '}') {
5365 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5366 if (n
>= 0 && index
>= n
)
5367 tcc_error("index too large");
5368 /* must put zero in holes (note that doing it that way
5369 ensures that it even works with designators) */
5370 if (!size_only
&& array_length
< index
) {
5371 init_putz(t1
, sec
, c
+ array_length
* size1
,
5372 (index
- array_length
) * size1
);
5375 if (index
> array_length
)
5376 array_length
= index
;
5377 /* special test for multi dimensional arrays (may not
5378 be strictly correct if designators are used at the
5380 if (index
>= n
&& no_oblock
)
5389 /* put zeros at the end */
5390 if (!size_only
&& n
>= 0 && array_length
< n
) {
5391 init_putz(t1
, sec
, c
+ array_length
* size1
,
5392 (n
- array_length
) * size1
);
5394 /* patch type size if needed */
5396 s
->c
= array_length
;
5397 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5398 (sec
|| !first
|| tok
== '{')) {
5401 /* NOTE: the previous test is a specific case for automatic
5402 struct/union init */
5403 /* XXX: union needs only one init */
5405 /* XXX: this test is incorrect for local initializers
5406 beginning with ( without {. It would be much more difficult
5407 to do it correctly (ideally, the expression parser should
5408 be used in all cases) */
5414 while (tok
== '(') {
5418 if (!parse_btype(&type1
, &ad1
))
5420 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5422 if (!is_assignable_types(type
, &type1
))
5423 tcc_error("invalid type for cast");
5428 if (first
|| tok
== '{') {
5437 while (tok
!= '}') {
5438 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5440 if (!size_only
&& array_length
< index
) {
5441 init_putz(type
, sec
, c
+ array_length
,
5442 index
- array_length
);
5444 index
= index
+ type_size(&f
->type
, &align1
);
5445 if (index
> array_length
)
5446 array_length
= index
;
5448 /* gr: skip fields from same union - ugly. */
5450 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5451 /* test for same offset */
5452 if (f
->next
->c
!= f
->c
)
5454 /* if yes, test for bitfield shift */
5455 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5456 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5457 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5458 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5459 if (bit_pos_1
!= bit_pos_2
)
5466 if (no_oblock
&& f
== NULL
)
5472 /* put zeros at the end */
5473 if (!size_only
&& array_length
< n
) {
5474 init_putz(type
, sec
, c
+ array_length
,
5483 } else if (tok
== '{') {
5485 decl_initializer(type
, sec
, c
, first
, size_only
);
5487 } else if (size_only
) {
5488 /* just skip expression */
5489 parlevel
= parlevel1
= 0;
5490 while ((parlevel
> 0 || parlevel1
> 0 ||
5491 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5494 else if (tok
== ')')
5496 else if (tok
== '{')
5498 else if (tok
== '}')
5503 /* currently, we always use constant expression for globals
5504 (may change for scripting case) */
5505 expr_type
= EXPR_CONST
;
5507 expr_type
= EXPR_ANY
;
5508 init_putv(type
, sec
, c
, 0, expr_type
);
5512 /* parse an initializer for type 't' if 'has_init' is non zero, and
5513 allocate space in local or global data space ('r' is either
5514 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5515 variable 'v' with an associated name represented by 'asm_label' of
5516 scope 'scope' is declared before initializers are parsed. If 'v' is
5517 zero, then a reference to the new object is put in the value stack.
5518 If 'has_init' is 2, a special parsing is done to handle string
5520 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5521 int has_init
, int v
, char *asm_label
,
5524 int size
, align
, addr
, data_offset
;
5526 ParseState saved_parse_state
= {0};
5527 TokenString init_str
;
5529 Sym
*flexible_array
;
5531 flexible_array
= NULL
;
5532 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5533 Sym
*field
= type
->ref
->next
;
5536 field
= field
->next
;
5537 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5538 flexible_array
= field
;
5542 size
= type_size(type
, &align
);
5543 /* If unknown size, we must evaluate it before
5544 evaluating initializers because
5545 initializers can generate global data too
5546 (e.g. string pointers or ISOC99 compound
5547 literals). It also simplifies local
5548 initializers handling */
5549 tok_str_new(&init_str
);
5550 if (size
< 0 || (flexible_array
&& has_init
)) {
5552 tcc_error("unknown type size");
5553 /* get all init string */
5554 if (has_init
== 2) {
5555 /* only get strings */
5556 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5557 tok_str_add_tok(&init_str
);
5562 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5564 tcc_error("unexpected end of file in initializer");
5565 tok_str_add_tok(&init_str
);
5568 else if (tok
== '}') {
5578 tok_str_add(&init_str
, -1);
5579 tok_str_add(&init_str
, 0);
5582 save_parse_state(&saved_parse_state
);
5584 macro_ptr
= init_str
.str
;
5586 decl_initializer(type
, NULL
, 0, 1, 1);
5587 /* prepare second initializer parsing */
5588 macro_ptr
= init_str
.str
;
5591 /* if still unknown size, error */
5592 size
= type_size(type
, &align
);
5594 tcc_error("unknown type size");
5597 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5598 /* take into account specified alignment if bigger */
5599 if (ad
->a
.aligned
) {
5600 if (ad
->a
.aligned
> align
)
5601 align
= ad
->a
.aligned
;
5602 } else if (ad
->a
.packed
) {
5605 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5607 #ifdef CONFIG_TCC_BCHECK
5608 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5612 loc
= (loc
- size
) & -align
;
5614 #ifdef CONFIG_TCC_BCHECK
5615 /* handles bounds */
5616 /* XXX: currently, since we do only one pass, we cannot track
5617 '&' operators, so we add only arrays */
5618 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5619 unsigned long *bounds_ptr
;
5620 /* add padding between regions */
5622 /* then add local bound info */
5623 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5624 bounds_ptr
[0] = addr
;
5625 bounds_ptr
[1] = size
;
5629 /* local variable */
5630 sym_push(v
, type
, r
, addr
);
5632 /* push local reference */
5633 vset(type
, r
, addr
);
5639 if (v
&& scope
== VT_CONST
) {
5640 /* see if the symbol was already defined */
5643 if (!is_compatible_types(&sym
->type
, type
))
5644 tcc_error("incompatible types for redefinition of '%s'",
5645 get_tok_str(v
, NULL
));
5646 if (sym
->type
.t
& VT_EXTERN
) {
5647 /* if the variable is extern, it was not allocated */
5648 sym
->type
.t
&= ~VT_EXTERN
;
5649 /* set array size if it was omitted in extern
5651 if ((sym
->type
.t
& VT_ARRAY
) &&
5652 sym
->type
.ref
->c
< 0 &&
5654 sym
->type
.ref
->c
= type
->ref
->c
;
5656 /* we accept several definitions of the same
5657 global variable. this is tricky, because we
5658 must play with the SHN_COMMON type of the symbol */
5659 /* XXX: should check if the variable was already
5660 initialized. It is incorrect to initialized it
5662 /* no init data, we won't add more to the symbol */
5669 /* allocate symbol in corresponding section */
5674 else if (tcc_state
->nocommon
)
5678 data_offset
= sec
->data_offset
;
5679 data_offset
= (data_offset
+ align
- 1) & -align
;
5681 /* very important to increment global pointer at this time
5682 because initializers themselves can create new initializers */
5683 data_offset
+= size
;
5684 #ifdef CONFIG_TCC_BCHECK
5685 /* add padding if bound check */
5686 if (tcc_state
->do_bounds_check
)
5689 sec
->data_offset
= data_offset
;
5690 /* allocate section space to put the data */
5691 if (sec
->sh_type
!= SHT_NOBITS
&&
5692 data_offset
> sec
->data_allocated
)
5693 section_realloc(sec
, data_offset
);
5694 /* align section if needed */
5695 if (align
> sec
->sh_addralign
)
5696 sec
->sh_addralign
= align
;
5698 addr
= 0; /* avoid warning */
5702 if (scope
!= VT_CONST
|| !sym
) {
5703 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5704 sym
->asm_label
= asm_label
;
5706 /* update symbol definition */
5708 put_extern_sym(sym
, sec
, addr
, size
);
5711 /* put a common area */
5712 put_extern_sym(sym
, NULL
, align
, size
);
5713 /* XXX: find a nicer way */
5714 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5715 esym
->st_shndx
= SHN_COMMON
;
5718 /* push global reference */
5719 sym
= get_sym_ref(type
, sec
, addr
, size
);
5720 vpushsym(type
, sym
);
5722 /* patch symbol weakness */
5723 if (type
->t
& VT_WEAK
)
5725 apply_visibility(sym
, type
);
5726 #ifdef CONFIG_TCC_BCHECK
5727 /* handles bounds now because the symbol must be defined
5728 before for the relocation */
5729 if (tcc_state
->do_bounds_check
) {
5730 unsigned long *bounds_ptr
;
5732 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5733 /* then add global bound info */
5734 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5735 bounds_ptr
[0] = 0; /* relocated */
5736 bounds_ptr
[1] = size
;
5740 if (has_init
|| (type
->t
& VT_VLA
)) {
5741 decl_initializer(type
, sec
, addr
, 1, 0);
5742 /* restore parse state if needed */
5744 tok_str_free(init_str
.str
);
5745 restore_parse_state(&saved_parse_state
);
5747 /* patch flexible array member size back to -1, */
5748 /* for possible subsequent similar declarations */
5750 flexible_array
->type
.ref
->c
= -1;
5755 static void put_func_debug(Sym
*sym
)
5760 /* XXX: we put here a dummy type */
5761 snprintf(buf
, sizeof(buf
), "%s:%c1",
5762 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5763 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5764 cur_text_section
, sym
->c
);
5765 /* //gr gdb wants a line at the function */
5766 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5771 /* parse an old style function declaration list */
5772 /* XXX: check multiple parameter */
5773 static void func_decl_list(Sym
*func_sym
)
5780 /* parse each declaration */
5781 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5782 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5783 if (!parse_btype(&btype
, &ad
))
5784 expect("declaration list");
5785 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5786 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5788 /* we accept no variable after */
5792 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5793 /* find parameter in function parameter list */
5796 if ((s
->v
& ~SYM_FIELD
) == v
)
5800 tcc_error("declaration for parameter '%s' but no such parameter",
5801 get_tok_str(v
, NULL
));
5803 /* check that no storage specifier except 'register' was given */
5804 if (type
.t
& VT_STORAGE
)
5805 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5806 convert_parameter_type(&type
);
5807 /* we can add the type (NOTE: it could be local to the function) */
5809 /* accept other parameters */
5820 /* parse a function defined by symbol 'sym' and generate its code in
5821 'cur_text_section' */
5822 static void gen_function(Sym
*sym
)
5824 int saved_nocode_wanted
= nocode_wanted
;
5826 ind
= cur_text_section
->data_offset
;
5827 /* NOTE: we patch the symbol size later */
5828 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5829 funcname
= get_tok_str(sym
->v
, NULL
);
5831 /* Initialize VLA state */
5832 vla_sp_loc
= &vla_sp_root_loc
;
5833 vla_flags
= VLA_NEED_NEW_FRAME
;
5834 /* put debug symbol */
5835 if (tcc_state
->do_debug
)
5836 put_func_debug(sym
);
5837 /* push a dummy symbol to enable local sym storage */
5838 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5839 gfunc_prolog(&sym
->type
);
5840 #ifdef CONFIG_TCC_BCHECK
5841 if (tcc_state
->do_bounds_check
5842 && !strcmp(get_tok_str(sym
->v
, NULL
), "main")) {
5846 for (i
= 0, sym
= local_stack
; i
< 2; i
++, sym
= sym
->prev
) {
5847 if (sym
->v
& SYM_FIELD
|| sym
->prev
->v
& SYM_FIELD
)
5849 vpush_global_sym(&func_old_type
, TOK___bound_main_arg
);
5850 vset(&sym
->type
, sym
->r
, sym
->c
);
5856 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5859 cur_text_section
->data_offset
= ind
;
5860 label_pop(&global_label_stack
, NULL
);
5861 /* reset local stack */
5862 scope_stack_bottom
= NULL
;
5863 sym_pop(&local_stack
, NULL
);
5864 /* end of function */
5865 /* patch symbol size */
5866 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5868 /* patch symbol weakness (this definition overrules any prototype) */
5869 if (sym
->type
.t
& VT_WEAK
)
5871 apply_visibility(sym
, &sym
->type
);
5872 if (tcc_state
->do_debug
) {
5873 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5875 /* It's better to crash than to generate wrong code */
5876 cur_text_section
= NULL
;
5877 funcname
= ""; /* for safety */
5878 func_vt
.t
= VT_VOID
; /* for safety */
5879 func_var
= 0; /* for safety */
5880 ind
= 0; /* for safety */
5881 nocode_wanted
= saved_nocode_wanted
;
5884 ST_FUNC
void gen_inline_functions(void)
5887 int *str
, inline_generated
, i
;
5888 struct InlineFunc
*fn
;
5890 /* iterate while inline function are referenced */
5892 inline_generated
= 0;
5893 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5894 fn
= tcc_state
->inline_fns
[i
];
5896 if (sym
&& sym
->c
) {
5897 /* the function was used: generate its code and
5898 convert it to a normal function */
5899 str
= fn
->token_str
;
5902 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5903 sym
->r
= VT_SYM
| VT_CONST
;
5904 sym
->type
.t
&= ~VT_INLINE
;
5908 cur_text_section
= text_section
;
5910 macro_ptr
= NULL
; /* fail safe */
5912 inline_generated
= 1;
5915 if (!inline_generated
)
5918 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5919 fn
= tcc_state
->inline_fns
[i
];
5920 str
= fn
->token_str
;
5923 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5926 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5927 static int decl0(int l
, int is_for_loop_init
)
5935 if (!parse_btype(&btype
, &ad
)) {
5936 if (is_for_loop_init
)
5938 /* skip redundant ';' */
5939 /* XXX: find more elegant solution */
5944 if (l
== VT_CONST
&&
5945 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5946 /* global asm block */
5950 /* special test for old K&R protos without explicit int
5951 type. Only accepted when defining global data */
5952 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5956 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5957 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5959 /* we accept no variable after */
5963 while (1) { /* iterate thru each declaration */
5964 char *asm_label
; // associated asm label
5966 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5970 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5971 printf("type = '%s'\n", buf
);
5974 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5975 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5976 tcc_error("function without file scope cannot be static");
5978 /* if old style function prototype, we accept a
5981 if (sym
->c
== FUNC_OLD
)
5982 func_decl_list(sym
);
5986 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5989 asm_label_instr(&astr
);
5990 asm_label
= tcc_strdup(astr
.data
);
5993 /* parse one last attribute list, after asm label */
5994 parse_attribute(&ad
);
5999 #ifdef TCC_TARGET_PE
6000 if (ad
.a
.func_import
)
6001 type
.t
|= VT_IMPORT
;
6002 if (ad
.a
.func_export
)
6003 type
.t
|= VT_EXPORT
;
6005 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6009 tcc_error("cannot use local functions");
6010 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6011 expect("function definition");
6013 /* reject abstract declarators in function definition */
6015 while ((sym
= sym
->next
) != NULL
)
6016 if (!(sym
->v
& ~SYM_FIELD
))
6017 expect("identifier");
6019 /* XXX: cannot do better now: convert extern line to static inline */
6020 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6021 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6026 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6029 ref
= sym
->type
.ref
;
6030 if (0 == ref
->a
.func_proto
)
6031 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6033 /* use func_call from prototype if not defined */
6034 if (ref
->a
.func_call
!= FUNC_CDECL
6035 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6036 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6038 /* use export from prototype */
6039 if (ref
->a
.func_export
)
6040 type
.ref
->a
.func_export
= 1;
6042 /* use static from prototype */
6043 if (sym
->type
.t
& VT_STATIC
)
6044 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6046 /* If the definition has no visibility use the
6047 one from prototype. */
6048 if (! (type
.t
& VT_VIS_MASK
))
6049 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6051 if (!is_compatible_types(&sym
->type
, &type
)) {
6053 tcc_error("incompatible types for redefinition of '%s'",
6054 get_tok_str(v
, NULL
));
6056 type
.ref
->a
.func_proto
= 0;
6057 /* if symbol is already defined, then put complete type */
6060 /* put function symbol */
6061 sym
= global_identifier_push(v
, type
.t
, 0);
6062 sym
->type
.ref
= type
.ref
;
6065 /* static inline functions are just recorded as a kind
6066 of macro. Their code will be emitted at the end of
6067 the compilation unit only if they are used */
6068 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6069 (VT_INLINE
| VT_STATIC
)) {
6070 TokenString func_str
;
6072 struct InlineFunc
*fn
;
6073 const char *filename
;
6075 tok_str_new(&func_str
);
6081 tcc_error("unexpected end of file");
6082 tok_str_add_tok(&func_str
);
6087 } else if (t
== '}') {
6089 if (block_level
== 0)
6093 tok_str_add(&func_str
, -1);
6094 tok_str_add(&func_str
, 0);
6095 filename
= file
? file
->filename
: "";
6096 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6097 strcpy(fn
->filename
, filename
);
6099 fn
->token_str
= func_str
.str
;
6100 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6103 /* compute text section */
6104 cur_text_section
= ad
.section
;
6105 if (!cur_text_section
)
6106 cur_text_section
= text_section
;
6107 sym
->r
= VT_SYM
| VT_CONST
;
6112 if (btype
.t
& VT_TYPEDEF
) {
6113 /* save typedefed type */
6114 /* XXX: test storage specifiers ? */
6115 sym
= sym_push(v
, &type
, 0, 0);
6117 sym
->type
.t
|= VT_TYPEDEF
;
6120 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6121 /* external function definition */
6122 /* specific case for func_call attribute */
6123 ad
.a
.func_proto
= 1;
6125 } else if (!(type
.t
& VT_ARRAY
)) {
6126 /* not lvalue if array */
6127 r
|= lvalue_type(type
.t
);
6129 has_init
= (tok
== '=');
6130 if (has_init
&& (type
.t
& VT_VLA
))
6131 tcc_error("Variable length array cannot be initialized");
6132 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6133 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6134 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6135 /* external variable or function */
6136 /* NOTE: as GCC, uninitialized global static
6137 arrays of null size are considered as
6139 sym
= external_sym(v
, &type
, r
, asm_label
);
6141 if (ad
.alias_target
) {
6146 alias_target
= sym_find(ad
.alias_target
);
6147 if (!alias_target
|| !alias_target
->c
)
6148 tcc_error("unsupported forward __alias__ attribute");
6149 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6150 tsec
.sh_num
= esym
->st_shndx
;
6151 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6154 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6155 if (type
.t
& VT_STATIC
)
6161 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
6165 if (is_for_loop_init
)
6178 ST_FUNC
void decl(int l
)