2 * TCC - Tiny C Compiler
4 * Copyright (c) 2001-2004 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /********************************************************/
24 /* global variables */
26 /* loc : local variable index
27 ind : output code index
29 anon_sym: anonymous symbol index
31 ST_DATA
int rsym
, anon_sym
, ind
, loc
;
33 ST_DATA Section
*text_section
, *data_section
, *bss_section
; /* predefined sections */
34 ST_DATA Section
*cur_text_section
; /* current section where function code is generated */
36 ST_DATA Section
*last_text_section
; /* to handle .previous asm directive */
38 #ifdef CONFIG_TCC_BCHECK
39 /* bound check related sections */
40 ST_DATA Section
*bounds_section
; /* contains global data bound description */
41 ST_DATA Section
*lbounds_section
; /* contains local data bound description */
44 ST_DATA Section
*symtab_section
, *strtab_section
;
46 ST_DATA Section
*stab_section
, *stabstr_section
;
47 ST_DATA Sym
*sym_free_first
;
48 ST_DATA
void **sym_pools
;
49 ST_DATA
int nb_sym_pools
;
51 ST_DATA Sym
*global_stack
;
52 ST_DATA Sym
*local_stack
;
53 ST_DATA Sym
*scope_stack_bottom
;
54 ST_DATA Sym
*define_stack
;
55 ST_DATA Sym
*global_label_stack
;
56 ST_DATA Sym
*local_label_stack
;
58 ST_DATA
int vla_sp_loc_tmp
; /* vla_sp_loc is set to this when the value won't be needed later */
59 ST_DATA
int vla_sp_root_loc
; /* vla_sp_loc for SP before any VLAs were pushed */
60 ST_DATA
int *vla_sp_loc
; /* Pointer to variable holding location to store stack pointer on the stack when modifying stack pointer */
61 ST_DATA
int vla_flags
; /* VLA_* flags */
63 ST_DATA SValue __vstack
[1+VSTACK_SIZE
], *vtop
;
65 ST_DATA
int const_wanted
; /* true if constant wanted */
66 ST_DATA
int nocode_wanted
; /* true if no code generation wanted for an expression */
67 ST_DATA
int global_expr
; /* true if compound literals must be allocated globally (used during initializers parsing */
68 ST_DATA CType func_vt
; /* current function return type (used by return instruction) */
69 ST_DATA
int func_var
; /* true if current function is variadic (used by return instruction) */
71 ST_DATA
int last_line_num
, last_ind
, func_ind
; /* debug last line number and pc */
72 ST_DATA
char *funcname
;
74 ST_DATA CType char_pointer_type
, func_old_type
, int_type
, size_type
;
76 /* ------------------------------------------------------------------------- */
77 static void gen_cast(CType
*type
);
78 static inline CType
*pointed_type(CType
*type
);
79 static int is_compatible_types(CType
*type1
, CType
*type2
);
80 static int parse_btype(CType
*type
, AttributeDef
*ad
);
81 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
82 static void parse_expr_type(CType
*type
);
83 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
84 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
, int case_reg
, int is_expr
);
85 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, char *asm_label
, int scope
);
86 static int decl0(int l
, int is_for_loop_init
);
87 static void expr_eq(void);
88 static void unary_type(CType
*type
);
89 static void vla_runtime_type_size(CType
*type
, int *a
);
90 static void vla_sp_save(void);
91 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
92 static void expr_type(CType
*type
);
94 ST_INLN
int is_float(int t
)
98 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
|| bt
== VT_QFLOAT
;
101 /* we use our own 'finite' function to avoid potential problems with
102 non standard math libs */
103 /* XXX: endianness dependent */
104 ST_FUNC
int ieee_finite(double d
)
107 memcpy(p
, &d
, sizeof(double));
108 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
111 ST_FUNC
void test_lvalue(void)
113 if (!(vtop
->r
& VT_LVAL
))
117 /* ------------------------------------------------------------------------- */
118 /* symbol allocator */
119 static Sym
*__sym_malloc(void)
121 Sym
*sym_pool
, *sym
, *last_sym
;
124 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
125 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
127 last_sym
= sym_free_first
;
129 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
130 sym
->next
= last_sym
;
134 sym_free_first
= last_sym
;
138 static inline Sym
*sym_malloc(void)
141 sym
= sym_free_first
;
143 sym
= __sym_malloc();
144 sym_free_first
= sym
->next
;
148 ST_INLN
void sym_free(Sym
*sym
)
150 sym
->next
= sym_free_first
;
151 tcc_free(sym
->asm_label
);
152 sym_free_first
= sym
;
155 /* push, without hashing */
156 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
159 if (ps
== &local_stack
) {
160 for (s
= *ps
; s
&& s
!= scope_stack_bottom
; s
= s
->prev
)
161 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
&& s
->v
== v
)
162 tcc_error("incompatible types for redefinition of '%s'",
163 get_tok_str(v
, NULL
));
182 /* find a symbol and return its associated structure. 's' is the top
183 of the symbol stack */
184 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
194 /* structure lookup */
195 ST_INLN Sym
*struct_find(int v
)
198 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
200 return table_ident
[v
]->sym_struct
;
203 /* find an identifier */
204 ST_INLN Sym
*sym_find(int v
)
207 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
209 return table_ident
[v
]->sym_identifier
;
212 /* push a given symbol on the symbol stack */
213 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
222 s
= sym_push2(ps
, v
, type
->t
, c
);
223 s
->type
.ref
= type
->ref
;
225 /* don't record fields or anonymous symbols */
227 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
228 /* record symbol in token array */
229 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
231 ps
= &ts
->sym_struct
;
233 ps
= &ts
->sym_identifier
;
240 /* push a global identifier */
241 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
244 s
= sym_push2(&global_stack
, v
, t
, c
);
245 /* don't record anonymous symbol */
246 if (v
< SYM_FIRST_ANOM
) {
247 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
248 /* modify the top most local identifier, so that
249 sym_identifier will point to 's' when popped */
251 ps
= &(*ps
)->prev_tok
;
258 /* pop symbols until top reaches 'b' */
259 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
269 /* remove symbol in token array */
271 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
272 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
274 ps
= &ts
->sym_struct
;
276 ps
= &ts
->sym_identifier
;
285 static void weaken_symbol(Sym
*sym
)
287 sym
->type
.t
|= VT_WEAK
;
292 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
293 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
294 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
298 /* ------------------------------------------------------------------------- */
300 ST_FUNC
void swap(int *p
, int *q
)
308 static void vsetc(CType
*type
, int r
, CValue
*vc
)
312 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
313 tcc_error("memory full (vstack)");
314 /* cannot let cpu flags if other instruction are generated. Also
315 avoid leaving VT_JMP anywhere except on the top of the stack
316 because it would complicate the code generator. */
317 if (vtop
>= vstack
) {
318 v
= vtop
->r
& VT_VALMASK
;
319 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
329 /* push constant of type "type" with useless value */
330 void vpush(CType
*type
)
333 vsetc(type
, VT_CONST
, &cval
);
336 /* push integer constant */
337 ST_FUNC
void vpushi(int v
)
341 vsetc(&int_type
, VT_CONST
, &cval
);
344 /* push a pointer sized constant */
345 static void vpushs(long long v
)
352 vsetc(&size_type
, VT_CONST
, &cval
);
355 /* push arbitrary 64bit constant */
356 void vpush64(int ty
, unsigned long long v
)
363 vsetc(&ctype
, VT_CONST
, &cval
);
366 /* push long long constant */
367 static inline void vpushll(long long v
)
369 vpush64(VT_LLONG
, v
);
372 /* push a symbol value of TYPE */
373 static inline void vpushsym(CType
*type
, Sym
*sym
)
378 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
382 /* Return a static symbol pointing to a section */
383 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
389 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
390 sym
->type
.ref
= type
->ref
;
391 sym
->r
= VT_CONST
| VT_SYM
;
392 put_extern_sym(sym
, sec
, offset
, size
);
396 /* push a reference to a section offset by adding a dummy symbol */
397 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
399 vpushsym(type
, get_sym_ref(type
, sec
, offset
, size
));
402 /* define a new external reference to a symbol 'v' of type 'u' */
403 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
409 /* push forward reference */
410 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
411 s
->type
.ref
= type
->ref
;
412 s
->r
= r
| VT_CONST
| VT_SYM
;
417 /* define a new external reference to a symbol 'v' with alternate asm
418 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
419 is no alternate name (most cases) */
420 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
426 /* push forward reference */
427 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
428 s
->asm_label
= asm_label
;
429 s
->type
.t
|= VT_EXTERN
;
430 } else if (s
->type
.ref
== func_old_type
.ref
) {
431 s
->type
.ref
= type
->ref
;
432 s
->r
= r
| VT_CONST
| VT_SYM
;
433 s
->type
.t
|= VT_EXTERN
;
434 } else if (!is_compatible_types(&s
->type
, type
)) {
435 tcc_error("incompatible types for redefinition of '%s'",
436 get_tok_str(v
, NULL
));
441 /* push a reference to global symbol v */
442 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
444 vpushsym(type
, external_global_sym(v
, type
, 0));
447 ST_FUNC
void vset(CType
*type
, int r
, int v
)
452 vsetc(type
, r
, &cval
);
455 static void vseti(int r
, int v
)
463 ST_FUNC
void vswap(void)
466 /* cannot let cpu flags if other instruction are generated. Also
467 avoid leaving VT_JMP anywhere except on the top of the stack
468 because it would complicate the code generator. */
469 if (vtop
>= vstack
) {
470 int v
= vtop
->r
& VT_VALMASK
;
471 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
478 /* XXX: +2% overall speed possible with optimized memswap
480 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
484 ST_FUNC
void vpushv(SValue
*v
)
486 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
487 tcc_error("memory full (vstack)");
492 static void vdup(void)
497 /* save r to the memory stack, and mark it as being free */
498 ST_FUNC
void save_reg(int r
)
500 int l
, saved
, size
, align
;
504 /* modify all stack values */
507 for(p
=vstack
;p
<=vtop
;p
++) {
508 if ((p
->r
& VT_VALMASK
) == r
||
509 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
510 /* must save value on stack if not already done */
512 /* NOTE: must reload 'r' because r might be equal to r2 */
513 r
= p
->r
& VT_VALMASK
;
514 /* store register in the stack */
516 if ((p
->r
& VT_LVAL
) ||
517 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
518 #ifdef TCC_TARGET_X86_64
519 type
= &char_pointer_type
;
523 size
= type_size(type
, &align
);
524 loc
= (loc
- size
) & -align
;
526 sv
.r
= VT_LOCAL
| VT_LVAL
;
529 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
530 /* x86 specific: need to pop fp register ST0 if saved */
532 o(0xd8dd); /* fstp %st(0) */
535 #ifndef TCC_TARGET_X86_64
536 /* special long long case */
537 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
545 /* mark that stack entry as being saved on the stack */
546 if (p
->r
& VT_LVAL
) {
547 /* also clear the bounded flag because the
548 relocation address of the function was stored in
550 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
552 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
560 #ifdef TCC_TARGET_ARM
561 /* find a register of class 'rc2' with at most one reference on stack.
562 * If none, call get_reg(rc) */
563 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
568 for(r
=0;r
<NB_REGS
;r
++) {
569 if (reg_classes
[r
] & rc2
) {
572 for(p
= vstack
; p
<= vtop
; p
++) {
573 if ((p
->r
& VT_VALMASK
) == r
||
574 (p
->r2
& VT_VALMASK
) == r
)
585 /* find a free register of class 'rc'. If none, save one register */
586 ST_FUNC
int get_reg(int rc
)
591 /* find a free register */
592 for(r
=0;r
<NB_REGS
;r
++) {
593 if (reg_classes
[r
] & rc
) {
594 for(p
=vstack
;p
<=vtop
;p
++) {
595 if ((p
->r
& VT_VALMASK
) == r
||
596 (p
->r2
& VT_VALMASK
) == r
)
604 /* no register left : free the first one on the stack (VERY
605 IMPORTANT to start from the bottom to ensure that we don't
606 spill registers used in gen_opi()) */
607 for(p
=vstack
;p
<=vtop
;p
++) {
608 /* look at second register (if long long) */
609 r
= p
->r2
& VT_VALMASK
;
610 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
612 r
= p
->r
& VT_VALMASK
;
613 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
619 /* Should never comes here */
623 /* save registers up to (vtop - n) stack entry */
624 ST_FUNC
void save_regs(int n
)
629 for(p
= vstack
;p
<= p1
; p
++) {
630 r
= p
->r
& VT_VALMASK
;
637 /* move register 's' (of type 't') to 'r', and flush previous value of r to memory
639 static void move_reg(int r
, int s
, int t
)
653 /* get address of vtop (vtop MUST BE an lvalue) */
654 static void gaddrof(void)
656 if (vtop
->r
& VT_REF
)
659 /* tricky: if saved lvalue, then we can go back to lvalue */
660 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
661 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
666 #ifdef CONFIG_TCC_BCHECK
667 /* generate lvalue bound code */
668 static void gbound(void)
673 vtop
->r
&= ~VT_MUSTBOUND
;
674 /* if lvalue, then use checking code before dereferencing */
675 if (vtop
->r
& VT_LVAL
) {
676 /* if not VT_BOUNDED value, then make one */
677 if (!(vtop
->r
& VT_BOUNDED
)) {
678 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
679 /* must save type because we must set it to int to get pointer */
681 vtop
->type
.t
= VT_INT
;
684 gen_bounded_ptr_add();
685 vtop
->r
|= lval_type
;
688 /* then check for dereferencing */
689 gen_bounded_ptr_deref();
694 /* store vtop a register belonging to class 'rc'. lvalues are
695 converted to values. Cannot be used if cannot be converted to
696 register value (such as structures). */
697 ST_FUNC
int gv(int rc
)
699 int r
, bit_pos
, bit_size
, size
, align
, i
;
702 /* NOTE: get_reg can modify vstack[] */
703 if (vtop
->type
.t
& VT_BITFIELD
) {
706 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
707 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
708 /* remove bit field info to avoid loops */
709 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
710 /* cast to int to propagate signedness in following ops */
711 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
716 if((vtop
->type
.t
& VT_UNSIGNED
) ||
717 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
718 type
.t
|= VT_UNSIGNED
;
720 /* generate shifts */
721 vpushi(bits
- (bit_pos
+ bit_size
));
723 vpushi(bits
- bit_size
);
724 /* NOTE: transformed to SHR if unsigned */
728 if (is_float(vtop
->type
.t
) &&
729 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
732 unsigned long offset
;
733 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
737 /* XXX: unify with initializers handling ? */
738 /* CPUs usually cannot use float constants, so we store them
739 generically in data segment */
740 size
= type_size(&vtop
->type
, &align
);
741 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
742 data_section
->data_offset
= offset
;
743 /* XXX: not portable yet */
744 #if defined(__i386__) || defined(__x86_64__)
745 /* Zero pad x87 tenbyte long doubles */
746 if (size
== LDOUBLE_SIZE
) {
747 vtop
->c
.tab
[2] &= 0xffff;
748 #if LDOUBLE_SIZE == 16
753 ptr
= section_ptr_add(data_section
, size
);
755 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
759 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
763 ptr
[i
] = vtop
->c
.tab
[i
];
764 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
765 vtop
->r
|= VT_LVAL
| VT_SYM
;
769 #ifdef CONFIG_TCC_BCHECK
770 if (vtop
->r
& VT_MUSTBOUND
)
774 r
= vtop
->r
& VT_VALMASK
;
775 rc2
= (rc
& RC_FLOAT
) ? RC_FLOAT
: RC_INT
;
778 #ifdef TCC_TARGET_X86_64
779 else if (rc
== RC_FRET
)
783 /* need to reload if:
785 - lvalue (need to dereference pointer)
786 - already a register, but not in the right class */
788 || (vtop
->r
& VT_LVAL
)
789 || !(reg_classes
[r
] & rc
)
790 #ifdef TCC_TARGET_X86_64
791 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
792 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
&& !(reg_classes
[vtop
->r2
] & rc2
))
794 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
799 #ifdef TCC_TARGET_X86_64
800 if (((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
)) {
801 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
803 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
804 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
805 unsigned long long ll
;
807 int r2
, original_type
;
808 original_type
= vtop
->type
.t
;
809 /* two register type load : expand to two words
811 #ifndef TCC_TARGET_X86_64
812 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
815 vtop
->c
.ui
= ll
; /* first word */
817 vtop
->r
= r
; /* save register value */
818 vpushi(ll
>> 32); /* second word */
821 if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
822 (vtop
->r
& VT_LVAL
)) {
823 /* We do not want to modifier the long long
824 pointer here, so the safest (and less
825 efficient) is to save all the other registers
826 in the stack. XXX: totally inefficient. */
828 /* load from memory */
829 vtop
->type
.t
= load_type
;
832 vtop
[-1].r
= r
; /* save register value */
833 /* increment pointer to get second word */
834 vtop
->type
.t
= addr_type
;
839 vtop
->type
.t
= load_type
;
844 vtop
[-1].r
= r
; /* save register value */
845 vtop
->r
= vtop
[-1].r2
;
847 /* Allocate second register. Here we rely on the fact that
848 get_reg() tries first to free r2 of an SValue. */
852 /* write second register */
854 vtop
->type
.t
= original_type
;
855 } else if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
857 /* lvalue of scalar type : need to use lvalue type
858 because of possible cast */
861 /* compute memory access type */
862 if (vtop
->r
& VT_REF
)
863 #ifdef TCC_TARGET_X86_64
868 else if (vtop
->r
& VT_LVAL_BYTE
)
870 else if (vtop
->r
& VT_LVAL_SHORT
)
872 if (vtop
->r
& VT_LVAL_UNSIGNED
)
876 /* restore wanted type */
879 /* one register type load */
884 #ifdef TCC_TARGET_C67
885 /* uses register pairs for doubles */
886 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
893 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
894 ST_FUNC
void gv2(int rc1
, int rc2
)
898 /* generate more generic register first. But VT_JMP or VT_CMP
899 values must be generated first in all cases to avoid possible
901 v
= vtop
[0].r
& VT_VALMASK
;
902 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
907 /* test if reload is needed for first register */
908 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
918 /* test if reload is needed for first register */
919 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
925 /* wrapper around RC_FRET to return a register by type */
926 static int rc_fret(int t
)
928 #ifdef TCC_TARGET_X86_64
929 if (t
== VT_LDOUBLE
) {
936 /* wrapper around REG_FRET to return a register by type */
937 static int reg_fret(int t
)
939 #ifdef TCC_TARGET_X86_64
940 if (t
== VT_LDOUBLE
) {
947 /* expand long long on stack in two int registers */
948 static void lexpand(void)
952 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
955 vtop
[0].r
= vtop
[-1].r2
;
956 vtop
[0].r2
= VT_CONST
;
957 vtop
[-1].r2
= VT_CONST
;
958 vtop
[0].type
.t
= VT_INT
| u
;
959 vtop
[-1].type
.t
= VT_INT
| u
;
962 #ifdef TCC_TARGET_ARM
963 /* expand long long on stack */
964 ST_FUNC
void lexpand_nr(void)
968 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
971 vtop
->type
.t
= VT_INT
| u
;
972 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
974 vtop
[-1].c
.ui
= vtop
->c
.ull
;
975 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
977 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
979 vtop
->r
= vtop
[-1].r
;
980 } else if (v
> VT_CONST
) {
984 vtop
->r
= vtop
[-1].r2
;
985 vtop
[-1].r2
= VT_CONST
;
986 vtop
[-1].type
.t
= VT_INT
| u
;
990 /* build a long long from two ints */
991 static void lbuild(int t
)
994 vtop
[-1].r2
= vtop
[0].r
;
999 /* rotate n first stack elements to the bottom
1000 I1 ... In -> I2 ... In I1 [top is right]
1002 ST_FUNC
void vrotb(int n
)
1008 for(i
=-n
+1;i
!=0;i
++)
1009 vtop
[i
] = vtop
[i
+1];
1013 /* rotate the n elements before entry e towards the top
1014 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1016 ST_FUNC
void vrote(SValue
*e
, int n
)
1022 for(i
= 0;i
< n
- 1; i
++)
1027 /* rotate n first stack elements to the top
1028 I1 ... In -> In I1 ... I(n-1) [top is right]
1030 ST_FUNC
void vrott(int n
)
1035 /* pop stack value */
1036 ST_FUNC
void vpop(void)
1039 v
= vtop
->r
& VT_VALMASK
;
1040 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1041 /* for x86, we need to pop the FP stack */
1042 if (v
== TREG_ST0
&& !nocode_wanted
) {
1043 o(0xd8dd); /* fstp %st(0) */
1046 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1047 /* need to put correct jump if && or || without test */
1053 /* convert stack entry to register and duplicate its value in another
1055 static void gv_dup(void)
1061 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1068 /* stack: H L L1 H1 */
1076 /* duplicate value */
1081 #ifdef TCC_TARGET_X86_64
1082 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1092 load(r1
, &sv
); /* move r to r1 */
1094 /* duplicates value */
1100 /* Generate value test
1102 * Generate a test for any value (jump, comparison and integers) */
1103 int gvtst(int inv
, int t
)
1105 int v
= vtop
->r
& VT_VALMASK
;
1106 if (v
!= VT_CMP
&& v
!= VT_JMP
&& v
!= VT_JMPI
) {
1110 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1111 /* constant jmp optimization */
1112 if ((vtop
->c
.i
!= 0) != inv
)
1117 return gtst(inv
, t
);
1120 #ifndef TCC_TARGET_X86_64
1121 /* generate CPU independent (unsigned) long long operations */
1122 static void gen_opl(int op
)
1124 int t
, a
, b
, op1
, c
, i
;
1126 unsigned short reg_iret
= REG_IRET
;
1127 unsigned short reg_lret
= REG_LRET
;
1133 func
= TOK___divdi3
;
1136 func
= TOK___udivdi3
;
1139 func
= TOK___moddi3
;
1142 func
= TOK___umoddi3
;
1149 /* call generic long long function */
1150 vpush_global_sym(&func_old_type
, func
);
1155 vtop
->r2
= reg_lret
;
1168 /* stack: L1 H1 L2 H2 */
1173 vtop
[-2] = vtop
[-3];
1176 /* stack: H1 H2 L1 L2 */
1182 /* stack: H1 H2 L1 L2 ML MH */
1185 /* stack: ML MH H1 H2 L1 L2 */
1189 /* stack: ML MH H1 L2 H2 L1 */
1194 /* stack: ML MH M1 M2 */
1197 } else if (op
== '+' || op
== '-') {
1198 /* XXX: add non carry method too (for MIPS or alpha) */
1204 /* stack: H1 H2 (L1 op L2) */
1207 gen_op(op1
+ 1); /* TOK_xxxC2 */
1210 /* stack: H1 H2 (L1 op L2) */
1213 /* stack: (L1 op L2) H1 H2 */
1215 /* stack: (L1 op L2) (H1 op H2) */
1223 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1224 t
= vtop
[-1].type
.t
;
1228 /* stack: L H shift */
1230 /* constant: simpler */
1231 /* NOTE: all comments are for SHL. the other cases are
1232 done by swaping words */
1243 if (op
!= TOK_SAR
) {
1276 /* XXX: should provide a faster fallback on x86 ? */
1279 func
= TOK___ashrdi3
;
1282 func
= TOK___lshrdi3
;
1285 func
= TOK___ashldi3
;
1291 /* compare operations */
1297 /* stack: L1 H1 L2 H2 */
1299 vtop
[-1] = vtop
[-2];
1301 /* stack: L1 L2 H1 H2 */
1304 /* when values are equal, we need to compare low words. since
1305 the jump is inverted, we invert the test too. */
1308 else if (op1
== TOK_GT
)
1310 else if (op1
== TOK_ULT
)
1312 else if (op1
== TOK_UGT
)
1317 if (op1
!= TOK_NE
) {
1321 /* generate non equal test */
1322 /* XXX: NOT PORTABLE yet */
1326 #if defined(TCC_TARGET_I386)
1327 b
= psym(0x850f, 0);
1328 #elif defined(TCC_TARGET_ARM)
1330 o(0x1A000000 | encbranch(ind
, 0, 1));
1331 #elif defined(TCC_TARGET_C67)
1332 tcc_error("not implemented");
1334 #error not supported
1338 /* compare low. Always unsigned */
1342 else if (op1
== TOK_LE
)
1344 else if (op1
== TOK_GT
)
1346 else if (op1
== TOK_GE
)
1357 /* handle integer constant optimizations and various machine
1359 static void gen_opic(int op
)
1361 int c1
, c2
, t1
, t2
, n
;
1364 typedef unsigned long long U
;
1368 t1
= v1
->type
.t
& VT_BTYPE
;
1369 t2
= v2
->type
.t
& VT_BTYPE
;
1373 else if (v1
->type
.t
& VT_UNSIGNED
)
1380 else if (v2
->type
.t
& VT_UNSIGNED
)
1385 /* currently, we cannot do computations with forward symbols */
1386 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1387 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1390 case '+': l1
+= l2
; break;
1391 case '-': l1
-= l2
; break;
1392 case '&': l1
&= l2
; break;
1393 case '^': l1
^= l2
; break;
1394 case '|': l1
|= l2
; break;
1395 case '*': l1
*= l2
; break;
1402 /* if division by zero, generate explicit division */
1405 tcc_error("division by zero in constant");
1409 default: l1
/= l2
; break;
1410 case '%': l1
%= l2
; break;
1411 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1412 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1415 case TOK_SHL
: l1
<<= l2
; break;
1416 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1417 case TOK_SAR
: l1
>>= l2
; break;
1419 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1420 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1421 case TOK_EQ
: l1
= l1
== l2
; break;
1422 case TOK_NE
: l1
= l1
!= l2
; break;
1423 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1424 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1425 case TOK_LT
: l1
= l1
< l2
; break;
1426 case TOK_GE
: l1
= l1
>= l2
; break;
1427 case TOK_LE
: l1
= l1
<= l2
; break;
1428 case TOK_GT
: l1
= l1
> l2
; break;
1430 case TOK_LAND
: l1
= l1
&& l2
; break;
1431 case TOK_LOR
: l1
= l1
|| l2
; break;
1438 /* if commutative ops, put c2 as constant */
1439 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1440 op
== '|' || op
== '*')) {
1442 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1443 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1445 /* Filter out NOP operations like x*1, x-0, x&-1... */
1446 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1449 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1450 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1456 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1457 /* try to use shifts instead of muls or divs */
1458 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1467 else if (op
== TOK_PDIV
)
1473 } else if (c2
&& (op
== '+' || op
== '-') &&
1474 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1475 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1476 /* symbol + constant case */
1483 if (!nocode_wanted
) {
1484 /* call low level op generator */
1485 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1496 /* generate a floating point operation with constant propagation */
1497 static void gen_opif(int op
)
1505 /* currently, we cannot do computations with forward symbols */
1506 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1507 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1509 if (v1
->type
.t
== VT_FLOAT
) {
1512 } else if (v1
->type
.t
== VT_DOUBLE
) {
1520 /* NOTE: we only do constant propagation if finite number (not
1521 NaN or infinity) (ANSI spec) */
1522 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1526 case '+': f1
+= f2
; break;
1527 case '-': f1
-= f2
; break;
1528 case '*': f1
*= f2
; break;
1532 tcc_error("division by zero in constant");
1537 /* XXX: also handles tests ? */
1541 /* XXX: overflow test ? */
1542 if (v1
->type
.t
== VT_FLOAT
) {
1544 } else if (v1
->type
.t
== VT_DOUBLE
) {
1552 if (!nocode_wanted
) {
1560 static int pointed_size(CType
*type
)
1563 return type_size(pointed_type(type
), &align
);
1566 static void vla_runtime_pointed_size(CType
*type
)
1569 vla_runtime_type_size(pointed_type(type
), &align
);
1572 static inline int is_null_pointer(SValue
*p
)
1574 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1576 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1577 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0) ||
1578 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&& p
->c
.ptr
== 0);
1581 static inline int is_integer_btype(int bt
)
1583 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1584 bt
== VT_INT
|| bt
== VT_LLONG
);
1587 /* check types for comparison or substraction of pointers */
1588 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1590 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1593 /* null pointers are accepted for all comparisons as gcc */
1594 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1598 bt1
= type1
->t
& VT_BTYPE
;
1599 bt2
= type2
->t
& VT_BTYPE
;
1600 /* accept comparison between pointer and integer with a warning */
1601 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1602 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1603 tcc_warning("comparison between pointer and integer");
1607 /* both must be pointers or implicit function pointers */
1608 if (bt1
== VT_PTR
) {
1609 type1
= pointed_type(type1
);
1610 } else if (bt1
!= VT_FUNC
)
1611 goto invalid_operands
;
1613 if (bt2
== VT_PTR
) {
1614 type2
= pointed_type(type2
);
1615 } else if (bt2
!= VT_FUNC
) {
1617 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1619 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1620 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1624 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1625 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1626 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1627 /* gcc-like error if '-' is used */
1629 goto invalid_operands
;
1631 tcc_warning("comparison of distinct pointer types lacks a cast");
1635 /* generic gen_op: handles types problems */
1636 ST_FUNC
void gen_op(int op
)
1638 int u
, t1
, t2
, bt1
, bt2
, t
;
1641 t1
= vtop
[-1].type
.t
;
1642 t2
= vtop
[0].type
.t
;
1643 bt1
= t1
& VT_BTYPE
;
1644 bt2
= t2
& VT_BTYPE
;
1646 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1647 /* at least one operand is a pointer */
1648 /* relationnal op: must be both pointers */
1649 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1650 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1651 /* pointers are handled are unsigned */
1652 #ifdef TCC_TARGET_X86_64
1653 t
= VT_LLONG
| VT_UNSIGNED
;
1655 t
= VT_INT
| VT_UNSIGNED
;
1659 /* if both pointers, then it must be the '-' op */
1660 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1662 tcc_error("cannot use pointers here");
1663 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1664 /* XXX: check that types are compatible */
1665 if (vtop
[-1].type
.t
& VT_VLA
) {
1666 vla_runtime_pointed_size(&vtop
[-1].type
);
1668 vpushi(pointed_size(&vtop
[-1].type
));
1672 /* set to integer type */
1673 #ifdef TCC_TARGET_X86_64
1674 vtop
->type
.t
= VT_LLONG
;
1676 vtop
->type
.t
= VT_INT
;
1681 /* exactly one pointer : must be '+' or '-'. */
1682 if (op
!= '-' && op
!= '+')
1683 tcc_error("cannot use pointers here");
1684 /* Put pointer as first operand */
1685 if (bt2
== VT_PTR
) {
1689 type1
= vtop
[-1].type
;
1690 type1
.t
&= ~VT_ARRAY
;
1691 if (vtop
[-1].type
.t
& VT_VLA
)
1692 vla_runtime_pointed_size(&vtop
[-1].type
);
1694 u
= pointed_size(&vtop
[-1].type
);
1696 tcc_error("unknown array element size");
1697 #ifdef TCC_TARGET_X86_64
1700 /* XXX: cast to int ? (long long case) */
1705 #ifdef CONFIG_TCC_BCHECK
1706 /* if evaluating constant expression, no code should be
1707 generated, so no bound check */
1708 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1709 /* if bounded pointers, we generate a special code to
1716 gen_bounded_ptr_add();
1722 /* put again type if gen_opic() swaped operands */
1725 } else if (is_float(bt1
) || is_float(bt2
)) {
1726 /* compute bigger type and do implicit casts */
1727 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1729 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1734 /* floats can only be used for a few operations */
1735 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1736 (op
< TOK_ULT
|| op
> TOK_GT
))
1737 tcc_error("invalid operands for binary operation");
1739 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
1740 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
1741 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
1744 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1745 /* cast to biggest op */
1747 /* convert to unsigned if it does not fit in a long long */
1748 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1749 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1752 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1753 tcc_error("comparison of struct");
1755 /* integer operations */
1757 /* convert to unsigned if it does not fit in an integer */
1758 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1759 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1762 /* XXX: currently, some unsigned operations are explicit, so
1763 we modify them here */
1764 if (t
& VT_UNSIGNED
) {
1771 else if (op
== TOK_LT
)
1773 else if (op
== TOK_GT
)
1775 else if (op
== TOK_LE
)
1777 else if (op
== TOK_GE
)
1784 /* special case for shifts and long long: we keep the shift as
1786 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1793 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1794 /* relationnal op: the result is an int */
1795 vtop
->type
.t
= VT_INT
;
1802 #ifndef TCC_TARGET_ARM
1803 /* generic itof for unsigned long long case */
1804 static void gen_cvt_itof1(int t
)
1806 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1807 (VT_LLONG
| VT_UNSIGNED
)) {
1810 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1811 #if LDOUBLE_SIZE != 8
1812 else if (t
== VT_LDOUBLE
)
1813 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1816 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1820 vtop
->r
= reg_fret(t
);
1827 /* generic ftoi for unsigned long long case */
1828 static void gen_cvt_ftoi1(int t
)
1832 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1833 /* not handled natively */
1834 st
= vtop
->type
.t
& VT_BTYPE
;
1836 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1837 #if LDOUBLE_SIZE != 8
1838 else if (st
== VT_LDOUBLE
)
1839 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1842 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1847 vtop
->r2
= REG_LRET
;
1853 /* force char or short cast */
1854 static void force_charshort_cast(int t
)
1858 /* XXX: add optimization if lvalue : just change type and offset */
1863 if (t
& VT_UNSIGNED
) {
1864 vpushi((1 << bits
) - 1);
1870 /* result must be signed or the SAR is converted to an SHL
1871 This was not the case when "t" was a signed short
1872 and the last value on the stack was an unsigned int */
1873 vtop
->type
.t
&= ~VT_UNSIGNED
;
1879 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1880 static void gen_cast(CType
*type
)
1882 int sbt
, dbt
, sf
, df
, c
, p
;
1884 /* special delayed cast for char/short */
1885 /* XXX: in some cases (multiple cascaded casts), it may still
1887 if (vtop
->r
& VT_MUSTCAST
) {
1888 vtop
->r
&= ~VT_MUSTCAST
;
1889 force_charshort_cast(vtop
->type
.t
);
1892 /* bitfields first get cast to ints */
1893 if (vtop
->type
.t
& VT_BITFIELD
) {
1897 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1898 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1903 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1904 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1906 /* constant case: we can do it now */
1907 /* XXX: in ISOC, cannot do it if error in convert */
1908 if (sbt
== VT_FLOAT
)
1909 vtop
->c
.ld
= vtop
->c
.f
;
1910 else if (sbt
== VT_DOUBLE
)
1911 vtop
->c
.ld
= vtop
->c
.d
;
1914 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1915 if (sbt
& VT_UNSIGNED
)
1916 vtop
->c
.ld
= vtop
->c
.ull
;
1918 vtop
->c
.ld
= vtop
->c
.ll
;
1920 if (sbt
& VT_UNSIGNED
)
1921 vtop
->c
.ld
= vtop
->c
.ui
;
1923 vtop
->c
.ld
= vtop
->c
.i
;
1926 if (dbt
== VT_FLOAT
)
1927 vtop
->c
.f
= (float)vtop
->c
.ld
;
1928 else if (dbt
== VT_DOUBLE
)
1929 vtop
->c
.d
= (double)vtop
->c
.ld
;
1930 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1931 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1932 } else if (sf
&& dbt
== VT_BOOL
) {
1933 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1936 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1937 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1938 vtop
->c
.ll
= vtop
->c
.ull
;
1939 else if (sbt
& VT_UNSIGNED
)
1940 vtop
->c
.ll
= vtop
->c
.ui
;
1941 #ifdef TCC_TARGET_X86_64
1942 else if (sbt
== VT_PTR
)
1945 else if (sbt
!= VT_LLONG
)
1946 vtop
->c
.ll
= vtop
->c
.i
;
1948 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1949 vtop
->c
.ull
= vtop
->c
.ll
;
1950 else if (dbt
== VT_BOOL
)
1951 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1952 #ifdef TCC_TARGET_X86_64
1953 else if (dbt
== VT_PTR
)
1956 else if (dbt
!= VT_LLONG
) {
1958 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1960 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1962 if(dbt
& VT_UNSIGNED
)
1963 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1965 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1968 } else if (p
&& dbt
== VT_BOOL
) {
1971 } else if (!nocode_wanted
) {
1972 /* non constant case: generate code */
1974 /* convert from fp to fp */
1977 /* convert int to fp */
1980 /* convert fp to int */
1981 if (dbt
== VT_BOOL
) {
1985 /* we handle char/short/etc... with generic code */
1986 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1987 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1991 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1992 /* additional cast for char/short... */
1997 #ifndef TCC_TARGET_X86_64
1998 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1999 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
2000 /* scalar to long long */
2001 /* machine independent conversion */
2003 /* generate high word */
2004 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2008 if (sbt
== VT_PTR
) {
2009 /* cast from pointer to int before we apply
2010 shift operation, which pointers don't support*/
2011 gen_cast(&int_type
);
2017 /* patch second register */
2018 vtop
[-1].r2
= vtop
->r
;
2022 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2023 (dbt
& VT_BTYPE
) == VT_PTR
||
2024 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2025 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2026 (sbt
& VT_BTYPE
) != VT_PTR
&&
2027 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2028 /* need to convert from 32bit to 64bit */
2030 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2031 /* x86_64 specific: movslq */
2033 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2037 } else if (dbt
== VT_BOOL
) {
2038 /* scalar to bool */
2041 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2042 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2043 if (sbt
== VT_PTR
) {
2044 vtop
->type
.t
= VT_INT
;
2045 tcc_warning("nonportable conversion from pointer to char/short");
2047 force_charshort_cast(dbt
);
2048 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2050 if (sbt
== VT_LLONG
) {
2051 /* from long long: just take low order word */
2055 /* if lvalue and single word type, nothing to do because
2056 the lvalue already contains the real type size (see
2057 VT_LVAL_xxx constants) */
2060 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2061 /* if we are casting between pointer types,
2062 we must update the VT_LVAL_xxx size */
2063 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2064 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2069 /* return type size as known at compile time. Put alignment at 'a' */
2070 ST_FUNC
int type_size(CType
*type
, int *a
)
2075 bt
= type
->t
& VT_BTYPE
;
2076 if (bt
== VT_STRUCT
) {
2081 } else if (bt
== VT_PTR
) {
2082 if (type
->t
& VT_ARRAY
) {
2086 ts
= type_size(&s
->type
, a
);
2088 if (ts
< 0 && s
->c
< 0)
2096 } else if (bt
== VT_LDOUBLE
) {
2098 return LDOUBLE_SIZE
;
2099 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2100 #ifdef TCC_TARGET_I386
2101 #ifdef TCC_TARGET_PE
2106 #elif defined(TCC_TARGET_ARM)
2116 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2119 } else if (bt
== VT_SHORT
) {
2122 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2126 /* char, void, function, _Bool */
2132 /* push type size as known at runtime time on top of value stack. Put
2134 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2136 if (type
->t
& VT_VLA
) {
2137 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2139 vpushi(type_size(type
, a
));
2143 static void vla_sp_save(void) {
2144 if (!(vla_flags
& VLA_SP_LOC_SET
)) {
2145 *vla_sp_loc
= (loc
-= PTR_SIZE
);
2146 vla_flags
|= VLA_SP_LOC_SET
;
2148 if (!(vla_flags
& VLA_SP_SAVED
)) {
2149 gen_vla_sp_save(*vla_sp_loc
);
2150 vla_flags
|= VLA_SP_SAVED
;
2154 /* return the pointed type of t */
2155 static inline CType
*pointed_type(CType
*type
)
2157 return &type
->ref
->type
;
2160 /* modify type so that its it is a pointer to type. */
2161 ST_FUNC
void mk_pointer(CType
*type
)
2164 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2165 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2169 /* compare function types. OLD functions match any new functions */
2170 static int is_compatible_func(CType
*type1
, CType
*type2
)
2176 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2178 /* check func_call */
2179 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2181 /* XXX: not complete */
2182 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2186 while (s1
!= NULL
) {
2189 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2199 /* return true if type1 and type2 are the same. If unqualified is
2200 true, qualifiers on the types are ignored.
2202 - enums are not checked as gcc __builtin_types_compatible_p ()
2204 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2208 t1
= type1
->t
& VT_TYPE
;
2209 t2
= type2
->t
& VT_TYPE
;
2211 /* strip qualifiers before comparing */
2212 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2213 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2215 /* Default Vs explicit signedness only matters for char */
2216 if ((t1
& VT_BTYPE
) != VT_BYTE
) {
2220 /* XXX: bitfields ? */
2223 /* test more complicated cases */
2224 bt1
= t1
& VT_BTYPE
;
2225 if (bt1
== VT_PTR
) {
2226 type1
= pointed_type(type1
);
2227 type2
= pointed_type(type2
);
2228 return is_compatible_types(type1
, type2
);
2229 } else if (bt1
== VT_STRUCT
) {
2230 return (type1
->ref
== type2
->ref
);
2231 } else if (bt1
== VT_FUNC
) {
2232 return is_compatible_func(type1
, type2
);
2238 /* return true if type1 and type2 are exactly the same (including
2241 static int is_compatible_types(CType
*type1
, CType
*type2
)
2243 return compare_types(type1
,type2
,0);
2246 /* return true if type1 and type2 are the same (ignoring qualifiers).
2248 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2250 return compare_types(type1
,type2
,1);
2253 /* print a type. If 'varstr' is not NULL, then the variable is also
2254 printed in the type */
2256 /* XXX: add array and function pointers */
2257 static void type_to_str(char *buf
, int buf_size
,
2258 CType
*type
, const char *varstr
)
2265 t
= type
->t
& VT_TYPE
;
2268 if (t
& VT_CONSTANT
)
2269 pstrcat(buf
, buf_size
, "const ");
2270 if (t
& VT_VOLATILE
)
2271 pstrcat(buf
, buf_size
, "volatile ");
2272 if (t
& (VT_DEFSIGN
| VT_UNSIGNED
))
2273 pstrcat(buf
, buf_size
, "unsigned ");
2274 else if (t
& VT_DEFSIGN
)
2275 pstrcat(buf
, buf_size
, "signed ");
2305 tstr
= "long double";
2307 pstrcat(buf
, buf_size
, tstr
);
2311 if (bt
== VT_STRUCT
)
2315 pstrcat(buf
, buf_size
, tstr
);
2316 v
= type
->ref
->v
& ~SYM_STRUCT
;
2317 if (v
>= SYM_FIRST_ANOM
)
2318 pstrcat(buf
, buf_size
, "<anonymous>");
2320 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2324 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2325 pstrcat(buf
, buf_size
, "(");
2327 while (sa
!= NULL
) {
2328 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2329 pstrcat(buf
, buf_size
, buf1
);
2332 pstrcat(buf
, buf_size
, ", ");
2334 pstrcat(buf
, buf_size
, ")");
2338 pstrcpy(buf1
, sizeof(buf1
), "*");
2340 pstrcat(buf1
, sizeof(buf1
), varstr
);
2341 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2345 pstrcat(buf
, buf_size
, " ");
2346 pstrcat(buf
, buf_size
, varstr
);
2351 /* verify type compatibility to store vtop in 'dt' type, and generate
2353 static void gen_assign_cast(CType
*dt
)
2355 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2356 char buf1
[256], buf2
[256];
2359 st
= &vtop
->type
; /* source type */
2360 dbt
= dt
->t
& VT_BTYPE
;
2361 sbt
= st
->t
& VT_BTYPE
;
2362 if (sbt
== VT_VOID
|| dbt
== VT_VOID
)
2363 tcc_error("cannot cast from/to void");
2364 if (dt
->t
& VT_CONSTANT
)
2365 tcc_warning("assignment of read-only location");
2368 /* special cases for pointers */
2369 /* '0' can also be a pointer */
2370 if (is_null_pointer(vtop
))
2372 /* accept implicit pointer to integer cast with warning */
2373 if (is_integer_btype(sbt
)) {
2374 tcc_warning("assignment makes pointer from integer without a cast");
2377 type1
= pointed_type(dt
);
2378 /* a function is implicitely a function pointer */
2379 if (sbt
== VT_FUNC
) {
2380 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2381 !is_compatible_types(pointed_type(dt
), st
))
2382 tcc_warning("assignment from incompatible pointer type");
2387 type2
= pointed_type(st
);
2388 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2389 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2390 /* void * can match anything */
2392 /* exact type match, except for unsigned */
2395 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2397 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2399 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2400 tcc_warning("assignment from incompatible pointer type");
2402 /* check const and volatile */
2403 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2404 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2405 tcc_warning("assignment discards qualifiers from pointer target type");
2411 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2412 tcc_warning("assignment makes integer from pointer without a cast");
2414 /* XXX: more tests */
2419 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2420 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2421 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2423 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2424 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2425 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2433 /* store vtop in lvalue pushed on stack */
2434 ST_FUNC
void vstore(void)
2436 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2438 ft
= vtop
[-1].type
.t
;
2439 sbt
= vtop
->type
.t
& VT_BTYPE
;
2440 dbt
= ft
& VT_BTYPE
;
2441 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2442 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2443 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2444 /* optimize char/short casts */
2445 delayed_cast
= VT_MUSTCAST
;
2446 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2447 /* XXX: factorize */
2448 if (ft
& VT_CONSTANT
)
2449 tcc_warning("assignment of read-only location");
2452 if (!(ft
& VT_BITFIELD
))
2453 gen_assign_cast(&vtop
[-1].type
);
2456 if (sbt
== VT_STRUCT
) {
2457 /* if structure, only generate pointer */
2458 /* structure assignment : generate memcpy */
2459 /* XXX: optimize if small size */
2460 if (!nocode_wanted
) {
2461 size
= type_size(&vtop
->type
, &align
);
2465 vtop
->type
.t
= VT_PTR
;
2468 /* address of memcpy() */
2471 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2472 else if(!(align
& 3))
2473 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2476 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2481 vtop
->type
.t
= VT_PTR
;
2490 /* leave source on stack */
2491 } else if (ft
& VT_BITFIELD
) {
2492 /* bitfield store handling */
2493 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2494 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2495 /* remove bit field info to avoid loops */
2496 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2498 /* duplicate source into other register */
2503 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2504 gen_cast(&vtop
[-1].type
);
2505 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2508 /* duplicate destination */
2510 vtop
[-1] = vtop
[-2];
2512 /* mask and shift source */
2513 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2514 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2515 vpushll((1ULL << bit_size
) - 1ULL);
2517 vpushi((1 << bit_size
) - 1);
2523 /* load destination, mask and or with source */
2525 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2526 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2528 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2535 /* pop off shifted source from "duplicate source..." above */
2539 #ifdef CONFIG_TCC_BCHECK
2540 /* bound check case */
2541 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2547 if (!nocode_wanted
) {
2551 #ifdef TCC_TARGET_X86_64
2552 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2554 } else if ((ft
& VT_BTYPE
) == VT_QFLOAT
) {
2559 r
= gv(rc
); /* generate value */
2560 /* if lvalue was saved on stack, must read it */
2561 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2563 t
= get_reg(RC_INT
);
2564 #ifdef TCC_TARGET_X86_64
2569 sv
.r
= VT_LOCAL
| VT_LVAL
;
2570 sv
.c
.ul
= vtop
[-1].c
.ul
;
2572 vtop
[-1].r
= t
| VT_LVAL
;
2574 /* two word case handling : store second register at word + 4 (or +8 for x86-64) */
2575 #ifdef TCC_TARGET_X86_64
2576 if (((ft
& VT_BTYPE
) == VT_QLONG
) || ((ft
& VT_BTYPE
) == VT_QFLOAT
)) {
2577 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2579 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2580 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
2582 vtop
[-1].type
.t
= load_type
;
2585 /* convert to int to increment easily */
2586 vtop
->type
.t
= addr_type
;
2592 vtop
[-1].type
.t
= load_type
;
2593 /* XXX: it works because r2 is spilled last ! */
2594 store(vtop
->r2
, vtop
- 1);
2600 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2601 vtop
->r
|= delayed_cast
;
2605 /* post defines POST/PRE add. c is the token ++ or -- */
2606 ST_FUNC
void inc(int post
, int c
)
2609 vdup(); /* save lvalue */
2611 gv_dup(); /* duplicate value */
2616 vpushi(c
- TOK_MID
);
2618 vstore(); /* store value */
2620 vpop(); /* if post op, return saved value */
2623 /* Parse GNUC __attribute__ extension. Currently, the following
2624 extensions are recognized:
2625 - aligned(n) : set data/function alignment.
2626 - packed : force data alignment to 1
2627 - section(x) : generate data/code in this section.
2628 - unused : currently ignored, but may be used someday.
2629 - regparm(n) : pass function parameters in registers (i386 only)
2631 static void parse_attribute(AttributeDef
*ad
)
2635 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2639 while (tok
!= ')') {
2640 if (tok
< TOK_IDENT
)
2641 expect("attribute name");
2649 expect("section name");
2650 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2658 expect("alias(\"target\")");
2659 ad
->alias_target
= /* save string as token, for later */
2660 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2669 if (n
<= 0 || (n
& (n
- 1)) != 0)
2670 tcc_error("alignment must be a positive power of two");
2687 /* currently, no need to handle it because tcc does not
2688 track unused objects */
2692 /* currently, no need to handle it because tcc does not
2693 track unused objects */
2698 ad
->a
.func_call
= FUNC_CDECL
;
2703 ad
->a
.func_call
= FUNC_STDCALL
;
2705 #ifdef TCC_TARGET_I386
2715 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
2721 ad
->a
.func_call
= FUNC_FASTCALLW
;
2728 ad
->a
.mode
= VT_LLONG
+ 1;
2731 ad
->a
.mode
= VT_SHORT
+ 1;
2734 ad
->a
.mode
= VT_INT
+ 1;
2737 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2744 ad
->a
.func_export
= 1;
2747 ad
->a
.func_import
= 1;
2750 if (tcc_state
->warn_unsupported
)
2751 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2752 /* skip parameters */
2754 int parenthesis
= 0;
2758 else if (tok
== ')')
2761 } while (parenthesis
&& tok
!= -1);
2774 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2775 static void struct_decl(CType
*type
, int u
, int tdef
)
2777 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
;
2778 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2779 Sym
*s
, *ss
, *ass
, **ps
;
2783 a
= tok
; /* save decl type */
2788 /* struct already defined ? return it */
2790 expect("struct/union/enum name");
2794 tcc_error("invalid type");
2796 } else if (tok
>= TOK_IDENT
&& !tdef
)
2797 tcc_error("unknown struct/union/enum");
2803 /* we put an undefined size for struct/union */
2804 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2805 s
->r
= 0; /* default alignment is zero as gcc */
2806 /* put struct/union/enum name in type */
2814 tcc_error("struct/union/enum already defined");
2815 /* cannot be empty */
2817 /* non empty enums are not allowed */
2818 if (a
== TOK_ENUM
) {
2822 expect("identifier");
2825 tcc_error("redefinition of enumerator '%s'",
2826 get_tok_str(v
, NULL
));
2832 /* enum symbols have static storage */
2833 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2834 ss
->type
.t
|= VT_STATIC
;
2839 /* NOTE: we accept a trailing comma */
2843 s
->c
= type_size(&int_type
, &align
);
2852 while (tok
!= '}') {
2853 parse_btype(&btype
, &ad
);
2856 tcc_error("flexible array member '%s' not at the end of struct",
2857 get_tok_str(v
, NULL
));
2862 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2863 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2864 expect("identifier");
2865 if (type_size(&type1
, &align
) < 0) {
2866 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
2869 tcc_error("field '%s' has incomplete type",
2870 get_tok_str(v
, NULL
));
2872 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2873 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2874 tcc_error("invalid type for '%s'",
2875 get_tok_str(v
, NULL
));
2879 bit_size
= expr_const();
2880 /* XXX: handle v = 0 case for messages */
2882 tcc_error("negative width in bit-field '%s'",
2883 get_tok_str(v
, NULL
));
2884 if (v
&& bit_size
== 0)
2885 tcc_error("zero width for bit-field '%s'",
2886 get_tok_str(v
, NULL
));
2888 size
= type_size(&type1
, &align
);
2890 if (align
< ad
.a
.aligned
)
2891 align
= ad
.a
.aligned
;
2892 } else if (ad
.a
.packed
) {
2894 } else if (*tcc_state
->pack_stack_ptr
) {
2895 if (align
> *tcc_state
->pack_stack_ptr
)
2896 align
= *tcc_state
->pack_stack_ptr
;
2899 if (bit_size
>= 0) {
2900 bt
= type1
.t
& VT_BTYPE
;
2907 tcc_error("bitfields must have scalar type");
2909 if (bit_size
> bsize
) {
2910 tcc_error("width of '%s' exceeds its type",
2911 get_tok_str(v
, NULL
));
2912 } else if (bit_size
== bsize
) {
2913 /* no need for bit fields */
2915 } else if (bit_size
== 0) {
2916 /* XXX: what to do if only padding in a
2918 /* zero size: means to pad */
2921 /* we do not have enough room ?
2922 did the type change?
2924 if ((bit_pos
+ bit_size
) > bsize
||
2925 bt
!= prevbt
|| a
== TOK_UNION
)
2928 /* XXX: handle LSB first */
2929 type1
.t
|= VT_BITFIELD
|
2930 (bit_pos
<< VT_STRUCT_SHIFT
) |
2931 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2932 bit_pos
+= bit_size
;
2938 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2939 /* add new memory data only if starting
2941 if (lbit_pos
== 0) {
2942 if (a
== TOK_STRUCT
) {
2943 c
= (c
+ align
- 1) & -align
;
2952 if (align
> maxalign
)
2956 printf("add field %s offset=%d",
2957 get_tok_str(v
, NULL
), offset
);
2958 if (type1
.t
& VT_BITFIELD
) {
2959 printf(" pos=%d size=%d",
2960 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2961 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2966 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2968 while ((ass
= ass
->next
) != NULL
) {
2969 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2974 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2978 if (tok
== ';' || tok
== TOK_EOF
)
2985 /* store size and alignment */
2986 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2992 /* return 0 if no type declaration. otherwise, return the basic type
2995 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2997 int t
, u
, type_found
, typespec_found
, typedef_found
;
3001 memset(ad
, 0, sizeof(AttributeDef
));
3009 /* currently, we really ignore extension */
3019 if ((t
& VT_BTYPE
) != 0)
3020 tcc_error("too many basic types");
3036 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3037 #ifndef TCC_TARGET_PE
3038 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3040 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3041 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3055 if ((t
& VT_BTYPE
) == VT_LONG
) {
3056 #ifdef TCC_TARGET_PE
3057 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3059 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3067 struct_decl(&type1
, VT_ENUM
, t
& VT_TYPEDEF
);
3070 type
->ref
= type1
.ref
;
3074 struct_decl(&type1
, VT_STRUCT
, t
& VT_TYPEDEF
);
3077 /* type modifiers */
3093 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3094 tcc_error("signed and unsigned modifier");
3107 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3108 tcc_error("signed and unsigned modifier");
3109 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3134 /* GNUC attribute */
3135 case TOK_ATTRIBUTE1
:
3136 case TOK_ATTRIBUTE2
:
3137 parse_attribute(ad
);
3140 t
= (t
& ~VT_BTYPE
) | u
;
3148 parse_expr_type(&type1
);
3149 /* remove all storage modifiers except typedef */
3150 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3153 if (typespec_found
|| typedef_found
)
3156 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3159 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3160 type
->ref
= s
->type
.ref
;
3162 /* get attributes from typedef */
3163 if (0 == ad
->a
.aligned
)
3164 ad
->a
.aligned
= s
->a
.aligned
;
3165 if (0 == ad
->a
.func_call
)
3166 ad
->a
.func_call
= s
->a
.func_call
;
3167 ad
->a
.packed
|= s
->a
.packed
;
3176 if (tcc_state
->char_is_unsigned
) {
3177 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3181 /* long is never used as type */
3182 if ((t
& VT_BTYPE
) == VT_LONG
)
3183 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3184 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3186 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3192 /* convert a function parameter type (array to pointer and function to
3193 function pointer) */
3194 static inline void convert_parameter_type(CType
*pt
)
3196 /* remove const and volatile qualifiers (XXX: const could be used
3197 to indicate a const function parameter */
3198 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3199 /* array must be transformed to pointer according to ANSI C */
3201 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3206 ST_FUNC
void parse_asm_str(CString
*astr
)
3209 /* read the string */
3211 expect("string constant");
3213 while (tok
== TOK_STR
) {
3214 /* XXX: add \0 handling too ? */
3215 cstr_cat(astr
, tokc
.cstr
->data
);
3218 cstr_ccat(astr
, '\0');
3221 /* Parse an asm label and return the label
3222 * Don't forget to free the CString in the caller! */
3223 static void asm_label_instr(CString
*astr
)
3226 parse_asm_str(astr
);
3229 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3233 static void post_type(CType
*type
, AttributeDef
*ad
)
3235 int n
, l
, t1
, arg_size
, align
;
3236 Sym
**plast
, *s
, *first
;
3241 /* function declaration */
3249 /* read param name and compute offset */
3250 if (l
!= FUNC_OLD
) {
3251 if (!parse_btype(&pt
, &ad1
)) {
3253 tcc_error("invalid type");
3260 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3262 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3263 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3264 tcc_error("parameter declared as void");
3265 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3270 expect("identifier");
3274 convert_parameter_type(&pt
);
3275 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3281 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3288 /* if no parameters, then old type prototype */
3292 /* NOTE: const is ignored in returned type as it has a special
3293 meaning in gcc / C++ */
3294 type
->t
&= ~VT_CONSTANT
;
3295 /* some ancient pre-K&R C allows a function to return an array
3296 and the array brackets to be put after the arguments, such
3297 that "int c()[]" means something like "int[] c()" */
3300 skip(']'); /* only handle simple "[]" */
3303 /* we push a anonymous symbol which will contain the function prototype */
3304 ad
->a
.func_args
= arg_size
;
3305 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3310 } else if (tok
== '[') {
3311 /* array definition */
3313 if (tok
== TOK_RESTRICT1
)
3318 if (!local_stack
|| nocode_wanted
)
3319 vpushi(expr_const());
3321 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3324 tcc_error("invalid array size");
3326 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3327 tcc_error("size of variable length array should be an integer");
3332 /* parse next post type */
3333 post_type(type
, ad
);
3334 if (type
->t
== VT_FUNC
)
3335 tcc_error("declaration of an array of functions");
3336 t1
|= type
->t
& VT_VLA
;
3339 loc
-= type_size(&int_type
, &align
);
3343 vla_runtime_type_size(type
, &align
);
3345 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3352 /* we push an anonymous symbol which will contain the array
3354 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3355 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3360 /* Parse a type declaration (except basic type), and return the type
3361 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3362 expected. 'type' should contain the basic type. 'ad' is the
3363 attribute definition of the basic type. It can be modified by
3366 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3369 CType type1
, *type2
;
3370 int qualifiers
, storage
;
3372 while (tok
== '*') {
3380 qualifiers
|= VT_CONSTANT
;
3385 qualifiers
|= VT_VOLATILE
;
3393 type
->t
|= qualifiers
;
3396 /* XXX: clarify attribute handling */
3397 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3398 parse_attribute(ad
);
3400 /* recursive type */
3401 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3402 type1
.t
= 0; /* XXX: same as int */
3405 /* XXX: this is not correct to modify 'ad' at this point, but
3406 the syntax is not clear */
3407 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3408 parse_attribute(ad
);
3409 type_decl(&type1
, ad
, v
, td
);
3412 /* type identifier */
3413 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3417 if (!(td
& TYPE_ABSTRACT
))
3418 expect("identifier");
3422 storage
= type
->t
& VT_STORAGE
;
3423 type
->t
&= ~VT_STORAGE
;
3424 if (storage
& VT_STATIC
) {
3425 int saved_nocode_wanted
= nocode_wanted
;
3427 post_type(type
, ad
);
3428 nocode_wanted
= saved_nocode_wanted
;
3430 post_type(type
, ad
);
3432 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3433 parse_attribute(ad
);
3437 /* append type at the end of type1 */
3450 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3451 ST_FUNC
int lvalue_type(int t
)
3456 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3458 else if (bt
== VT_SHORT
)
3462 if (t
& VT_UNSIGNED
)
3463 r
|= VT_LVAL_UNSIGNED
;
3467 /* indirection with full error checking and bound check */
3468 ST_FUNC
void indir(void)
3470 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3471 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3475 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3477 vtop
->type
= *pointed_type(&vtop
->type
);
3478 /* Arrays and functions are never lvalues */
3479 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3480 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3481 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3482 /* if bound checking, the referenced pointer must be checked */
3483 #ifdef CONFIG_TCC_BCHECK
3484 if (tcc_state
->do_bounds_check
)
3485 vtop
->r
|= VT_MUSTBOUND
;
3490 /* pass a parameter to a function and do type checking and casting */
3491 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3496 func_type
= func
->c
;
3497 if (func_type
== FUNC_OLD
||
3498 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3499 /* default casting : only need to convert float to double */
3500 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3503 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3504 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3507 } else if (arg
== NULL
) {
3508 tcc_error("too many arguments to function");
3511 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3512 gen_assign_cast(&type
);
3516 /* parse an expression of the form '(type)' or '(expr)' and return its
3518 static void parse_expr_type(CType
*type
)
3524 if (parse_btype(type
, &ad
)) {
3525 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3532 static void parse_type(CType
*type
)
3537 if (!parse_btype(type
, &ad
)) {
3540 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3543 static void vpush_tokc(int t
)
3548 vsetc(&type
, VT_CONST
, &tokc
);
3551 ST_FUNC
void unary(void)
3553 int n
, t
, align
, size
, r
, sizeof_caller
;
3557 static int in_sizeof
= 0;
3559 sizeof_caller
= in_sizeof
;
3561 /* XXX: GCC 2.95.3 does not generate a table although it should be
3575 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3579 vpush_tokc(VT_LLONG
);
3583 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3587 vpush_tokc(VT_FLOAT
);
3591 vpush_tokc(VT_DOUBLE
);
3595 vpush_tokc(VT_LDOUBLE
);
3598 case TOK___FUNCTION__
:
3600 goto tok_identifier
;
3606 /* special function name identifier */
3607 len
= strlen(funcname
) + 1;
3608 /* generate char[len] type */
3613 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3614 ptr
= section_ptr_add(data_section
, len
);
3615 memcpy(ptr
, funcname
, len
);
3620 #ifdef TCC_TARGET_PE
3621 t
= VT_SHORT
| VT_UNSIGNED
;
3627 /* string parsing */
3630 if (tcc_state
->warn_write_strings
)
3635 memset(&ad
, 0, sizeof(AttributeDef
));
3636 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3641 if (parse_btype(&type
, &ad
)) {
3642 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3644 /* check ISOC99 compound literal */
3646 /* data is allocated locally by default */
3651 /* all except arrays are lvalues */
3652 if (!(type
.t
& VT_ARRAY
))
3653 r
|= lvalue_type(type
.t
);
3654 memset(&ad
, 0, sizeof(AttributeDef
));
3655 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3657 if (sizeof_caller
) {
3664 } else if (tok
== '{') {
3665 /* save all registers */
3667 /* statement expression : we do not accept break/continue
3668 inside as GCC does */
3669 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3684 /* functions names must be treated as function pointers,
3685 except for unary '&' and sizeof. Since we consider that
3686 functions are not lvalues, we only have to handle it
3687 there and in function calls. */
3688 /* arrays can also be used although they are not lvalues */
3689 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3690 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3692 mk_pointer(&vtop
->type
);
3698 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3700 boolean
.t
= VT_BOOL
;
3702 vtop
->c
.i
= !vtop
->c
.i
;
3703 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3704 vtop
->c
.i
= vtop
->c
.i
^ 1;
3707 vseti(VT_JMP
, gvtst(1, 0));
3719 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3720 tcc_error("pointer not accepted for unary plus");
3721 /* In order to force cast, we add zero, except for floating point
3722 where we really need an noop (otherwise -0.0 will be transformed
3724 if (!is_float(vtop
->type
.t
)) {
3735 unary_type(&type
); // Perform a in_sizeof = 0;
3736 size
= type_size(&type
, &align
);
3737 if (t
== TOK_SIZEOF
) {
3738 if (!(type
.t
& VT_VLA
)) {
3740 tcc_error("sizeof applied to an incomplete type");
3743 vla_runtime_type_size(&type
, &align
);
3748 vtop
->type
.t
|= VT_UNSIGNED
;
3751 case TOK_builtin_types_compatible_p
:
3760 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3761 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3762 vpushi(is_compatible_types(&type1
, &type2
));
3765 case TOK_builtin_constant_p
:
3767 int saved_nocode_wanted
, res
;
3770 saved_nocode_wanted
= nocode_wanted
;
3773 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3775 nocode_wanted
= saved_nocode_wanted
;
3780 case TOK_builtin_frame_address
:
3786 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3787 tcc_error("__builtin_frame_address only takes positive integers");
3794 vset(&type
, VT_LOCAL
, 0); /* local frame */
3796 mk_pointer(&vtop
->type
);
3797 indir(); /* -> parent frame */
3801 #ifdef TCC_TARGET_X86_64
3802 #ifdef TCC_TARGET_PE
3803 case TOK_builtin_va_start
:
3811 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
3812 tcc_error("__builtin_va_start expects a local variable");
3813 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
3814 vtop
->type
= char_pointer_type
;
3819 case TOK_builtin_va_arg_types
:
3826 vpushi(classify_x86_64_va_arg(&type
));
3841 t
= vtop
->type
.t
& VT_BTYPE
;
3843 /* In IEEE negate(x) isn't subtract(0,x), but rather
3848 else if (t
== VT_DOUBLE
)
3859 goto tok_identifier
;
3861 /* allow to take the address of a label */
3862 if (tok
< TOK_UIDENT
)
3863 expect("label identifier");
3864 s
= label_find(tok
);
3866 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3868 if (s
->r
== LABEL_DECLARED
)
3869 s
->r
= LABEL_FORWARD
;
3872 s
->type
.t
= VT_VOID
;
3873 mk_pointer(&s
->type
);
3874 s
->type
.t
|= VT_STATIC
;
3876 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3881 // special qnan , snan and infinity values
3883 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3887 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3891 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3900 expect("identifier");
3904 tcc_error("'%s' undeclared", get_tok_str(t
, NULL
));
3905 /* for simple function calls, we tolerate undeclared
3906 external reference to int() function */
3907 if (tcc_state
->warn_implicit_function_declaration
)
3908 tcc_warning("implicit declaration of function '%s'",
3909 get_tok_str(t
, NULL
));
3910 s
= external_global_sym(t
, &func_old_type
, 0);
3912 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3913 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3914 /* if referencing an inline function, then we generate a
3915 symbol to it if not already done. It will have the
3916 effect to generate code for it at the end of the
3917 compilation unit. Inline function as always
3918 generated in the text section. */
3920 put_extern_sym(s
, text_section
, 0, 0);
3921 r
= VT_SYM
| VT_CONST
;
3925 vset(&s
->type
, r
, s
->c
);
3926 /* if forward reference, we must point to s */
3927 if (vtop
->r
& VT_SYM
) {
3934 /* post operations */
3936 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3939 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3942 if (tok
== TOK_ARROW
)
3944 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3948 /* expect pointer on structure */
3949 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3950 expect("struct or union");
3954 while ((s
= s
->next
) != NULL
) {
3959 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3960 /* add field offset to pointer */
3961 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3964 /* change type to field type, and set to lvalue */
3965 vtop
->type
= s
->type
;
3966 vtop
->type
.t
|= qualifiers
;
3967 /* an array is never an lvalue */
3968 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3969 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3970 #ifdef CONFIG_TCC_BCHECK
3971 /* if bound checking, the referenced pointer must be checked */
3972 if (tcc_state
->do_bounds_check
)
3973 vtop
->r
|= VT_MUSTBOUND
;
3977 } else if (tok
== '[') {
3983 } else if (tok
== '(') {
3986 int nb_args
, ret_nregs
, ret_align
, variadic
;
3989 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3990 /* pointer test (no array accepted) */
3991 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3992 vtop
->type
= *pointed_type(&vtop
->type
);
3993 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3997 expect("function pointer");
4000 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4002 /* get return type */
4005 sa
= s
->next
; /* first parameter */
4008 /* compute first implicit argument if a structure is returned */
4009 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4010 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4011 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4014 /* get some space for the returned structure */
4015 size
= type_size(&s
->type
, &align
);
4016 loc
= (loc
- size
) & -align
;
4018 ret
.r
= VT_LOCAL
| VT_LVAL
;
4019 /* pass it as 'int' to avoid structure arg passing
4021 vseti(VT_LOCAL
, loc
);
4031 /* return in register */
4032 if (is_float(ret
.type
.t
)) {
4033 ret
.r
= reg_fret(ret
.type
.t
);
4034 #ifdef TCC_TARGET_X86_64
4035 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4039 #ifdef TCC_TARGET_X86_64
4040 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4042 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4052 gfunc_param_typed(s
, sa
);
4062 tcc_error("too few arguments to function");
4064 if (!nocode_wanted
) {
4065 gfunc_call(nb_args
);
4067 vtop
-= (nb_args
+ 1);
4071 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4072 vsetc(&ret
.type
, r
, &ret
.c
);
4073 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4076 /* handle packed struct return */
4077 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4080 size
= type_size(&s
->type
, &align
);
4081 loc
= (loc
- size
) & -align
;
4085 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4089 if (--ret_nregs
== 0)
4091 /* XXX: compatible with arm only: ret_align == register_size */
4092 offset
+= ret_align
;
4094 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4102 ST_FUNC
void expr_prod(void)
4107 while (tok
== '*' || tok
== '/' || tok
== '%') {
4115 ST_FUNC
void expr_sum(void)
4120 while (tok
== '+' || tok
== '-') {
4128 static void expr_shift(void)
4133 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4141 static void expr_cmp(void)
4146 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4147 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4155 static void expr_cmpeq(void)
4160 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4168 static void expr_and(void)
4171 while (tok
== '&') {
4178 static void expr_xor(void)
4181 while (tok
== '^') {
4188 static void expr_or(void)
4191 while (tok
== '|') {
4198 /* XXX: fix this mess */
4199 static void expr_land_const(void)
4202 while (tok
== TOK_LAND
) {
4209 /* XXX: fix this mess */
4210 static void expr_lor_const(void)
4213 while (tok
== TOK_LOR
) {
4220 /* only used if non constant */
4221 static void expr_land(void)
4226 if (tok
== TOK_LAND
) {
4231 if (tok
!= TOK_LAND
) {
4241 static void expr_lor(void)
4246 if (tok
== TOK_LOR
) {
4251 if (tok
!= TOK_LOR
) {
4261 /* XXX: better constant handling */
4262 static void expr_cond(void)
4264 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4266 CType type
, type1
, type2
;
4273 boolean
.t
= VT_BOOL
;
4279 if (tok
!= ':' || !gnu_ext
) {
4294 if (vtop
!= vstack
) {
4295 /* needed to avoid having different registers saved in
4297 if (is_float(vtop
->type
.t
)) {
4299 #ifdef TCC_TARGET_X86_64
4300 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4310 if (tok
== ':' && gnu_ext
) {
4318 sv
= *vtop
; /* save value to handle it later */
4319 vtop
--; /* no vpop so that FP stack is not flushed */
4327 bt1
= t1
& VT_BTYPE
;
4329 bt2
= t2
& VT_BTYPE
;
4330 /* cast operands to correct type according to ISOC rules */
4331 if (is_float(bt1
) || is_float(bt2
)) {
4332 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4333 type
.t
= VT_LDOUBLE
;
4334 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4339 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4340 /* cast to biggest op */
4342 /* convert to unsigned if it does not fit in a long long */
4343 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4344 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4345 type
.t
|= VT_UNSIGNED
;
4346 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4347 /* If one is a null ptr constant the result type
4349 if (is_null_pointer (vtop
))
4351 else if (is_null_pointer (&sv
))
4353 /* XXX: test pointer compatibility, C99 has more elaborate
4357 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4358 /* XXX: test function pointer compatibility */
4359 type
= bt1
== VT_FUNC
? type1
: type2
;
4360 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4361 /* XXX: test structure compatibility */
4362 type
= bt1
== VT_STRUCT
? type1
: type2
;
4363 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4364 /* NOTE: as an extension, we accept void on only one side */
4367 /* integer operations */
4369 /* convert to unsigned if it does not fit in an integer */
4370 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4371 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4372 type
.t
|= VT_UNSIGNED
;
4375 /* now we convert second operand */
4377 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4380 if (is_float(type
.t
)) {
4382 #ifdef TCC_TARGET_X86_64
4383 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4387 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4388 /* for long longs, we use fixed registers to avoid having
4389 to handle a complicated move */
4394 /* this is horrible, but we must also convert first
4398 /* put again first value and cast it */
4401 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4404 move_reg(r2
, r1
, type
.t
);
4411 static void expr_eq(void)
4417 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4418 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4419 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4434 ST_FUNC
void gexpr(void)
4445 /* parse an expression and return its type without any side effect. */
4446 static void expr_type(CType
*type
)
4448 int saved_nocode_wanted
;
4450 saved_nocode_wanted
= nocode_wanted
;
4455 nocode_wanted
= saved_nocode_wanted
;
4458 /* parse a unary expression and return its type without any side
4460 static void unary_type(CType
*type
)
4472 /* parse a constant expression and return value in vtop. */
4473 static void expr_const1(void)
4482 /* parse an integer constant and return its value. */
4483 ST_FUNC
int expr_const(void)
4487 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4488 expect("constant expression");
4494 /* return the label token if current token is a label, otherwise
4496 static int is_label(void)
4500 /* fast test first */
4501 if (tok
< TOK_UIDENT
)
4503 /* no need to save tokc because tok is an identifier */
4510 unget_tok(last_tok
);
4515 static void label_or_decl(int l
)
4519 /* fast test first */
4520 if (tok
>= TOK_UIDENT
)
4522 /* no need to save tokc because tok is an identifier */
4526 unget_tok(last_tok
);
4529 unget_tok(last_tok
);
4534 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4535 int case_reg
, int is_expr
)
4538 Sym
*s
, *frame_bottom
;
4540 /* generate line number info */
4541 if (tcc_state
->do_debug
&&
4542 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4543 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4545 last_line_num
= file
->line_num
;
4549 /* default return value is (void) */
4551 vtop
->type
.t
= VT_VOID
;
4554 if (tok
== TOK_IF
) {
4561 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4563 if (c
== TOK_ELSE
) {
4567 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4568 gsym(d
); /* patch else jmp */
4571 } else if (tok
== TOK_WHILE
) {
4579 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4583 } else if (tok
== '{') {
4585 int block_vla_sp_loc
, *saved_vla_sp_loc
, saved_vla_flags
;
4588 /* record local declaration stack position */
4590 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4591 frame_bottom
->next
= scope_stack_bottom
;
4592 scope_stack_bottom
= frame_bottom
;
4593 llabel
= local_label_stack
;
4595 /* save VLA state */
4596 block_vla_sp_loc
= *(saved_vla_sp_loc
= vla_sp_loc
);
4597 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4598 vla_sp_loc
= &block_vla_sp_loc
;
4600 saved_vla_flags
= vla_flags
;
4601 vla_flags
|= VLA_NEED_NEW_FRAME
;
4603 /* handle local labels declarations */
4604 if (tok
== TOK_LABEL
) {
4607 if (tok
< TOK_UIDENT
)
4608 expect("label identifier");
4609 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4619 while (tok
!= '}') {
4620 label_or_decl(VT_LOCAL
);
4624 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4627 /* pop locally defined labels */
4628 label_pop(&local_label_stack
, llabel
);
4630 /* XXX: this solution makes only valgrind happy...
4631 triggered by gcc.c-torture/execute/20000917-1.c */
4633 switch(vtop
->type
.t
& VT_BTYPE
) {
4638 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4640 tcc_error("unsupported expression type");
4643 /* pop locally defined symbols */
4644 scope_stack_bottom
= scope_stack_bottom
->next
;
4645 sym_pop(&local_stack
, s
);
4647 /* Pop VLA frames and restore stack pointer if required */
4648 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4649 *saved_vla_sp_loc
= block_vla_sp_loc
;
4650 if (vla_sp_loc
!= (saved_vla_sp_loc
== &vla_sp_root_loc
? &vla_sp_root_loc
: &block_vla_sp_loc
)) {
4651 vla_sp_loc
= saved_vla_sp_loc
;
4652 gen_vla_sp_restore(*vla_sp_loc
);
4654 vla_flags
= (vla_flags
& ~VLA_SCOPE_FLAGS
) | (saved_vla_flags
& VLA_SCOPE_FLAGS
);
4657 } else if (tok
== TOK_RETURN
) {
4661 gen_assign_cast(&func_vt
);
4662 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4663 CType type
, ret_type
;
4664 int ret_align
, ret_nregs
;
4665 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
4667 if (0 == ret_nregs
) {
4668 /* if returning structure, must copy it to implicit
4669 first pointer arg location */
4672 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4675 /* copy structure value to pointer */
4678 /* returning structure packed into registers */
4679 int r
, size
, addr
, align
;
4680 size
= type_size(&func_vt
,&align
);
4681 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& (ret_align
-1)))
4682 && (align
& (ret_align
-1))) {
4683 loc
= (loc
- size
) & -align
;
4686 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4689 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
4691 vtop
->type
= ret_type
;
4692 if (is_float(ret_type
.t
))
4693 r
= rc_fret(ret_type
.t
);
4699 if (--ret_nregs
== 0)
4701 /* We assume that when a structure is returned in multiple
4702 registers, their classes are consecutive values of the
4705 /* XXX: compatible with arm only: ret_align == register_size */
4706 vtop
->c
.i
+= ret_align
;
4707 vtop
->r
= VT_LOCAL
| VT_LVAL
;
4710 } else if (is_float(func_vt
.t
)) {
4711 gv(rc_fret(func_vt
.t
));
4715 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4718 rsym
= gjmp(rsym
); /* jmp */
4719 } else if (tok
== TOK_BREAK
) {
4722 tcc_error("cannot break");
4723 *bsym
= gjmp(*bsym
);
4726 } else if (tok
== TOK_CONTINUE
) {
4729 tcc_error("cannot continue");
4730 *csym
= gjmp(*csym
);
4733 } else if (tok
== TOK_FOR
) {
4738 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4739 frame_bottom
->next
= scope_stack_bottom
;
4740 scope_stack_bottom
= frame_bottom
;
4742 /* c99 for-loop init decl? */
4743 if (!decl0(VT_LOCAL
, 1)) {
4744 /* no, regular for-loop init expr */
4768 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4772 scope_stack_bottom
= scope_stack_bottom
->next
;
4773 sym_pop(&local_stack
, s
);
4775 if (tok
== TOK_DO
) {
4780 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4791 if (tok
== TOK_SWITCH
) {
4795 /* XXX: other types than integer */
4796 case_reg
= gv(RC_INT
);
4800 b
= gjmp(0); /* jump to first case */
4802 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4803 /* if no default, jmp after switch */
4811 if (tok
== TOK_CASE
) {
4818 if (gnu_ext
&& tok
== TOK_DOTS
) {
4822 tcc_warning("empty case range");
4824 /* since a case is like a label, we must skip it with a jmp */
4831 *case_sym
= gtst(1, 0);
4834 *case_sym
= gtst(1, 0);
4838 *case_sym
= gtst(1, *case_sym
);
4843 goto block_after_label
;
4845 if (tok
== TOK_DEFAULT
) {
4851 tcc_error("too many 'default'");
4854 goto block_after_label
;
4856 if (tok
== TOK_GOTO
) {
4858 if (tok
== '*' && gnu_ext
) {
4862 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4865 } else if (tok
>= TOK_UIDENT
) {
4866 s
= label_find(tok
);
4867 /* put forward definition if needed */
4869 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4871 if (s
->r
== LABEL_DECLARED
)
4872 s
->r
= LABEL_FORWARD
;
4874 /* label already defined */
4875 if (vla_flags
& VLA_IN_SCOPE
) {
4876 /* If VLAs are in use, save the current stack pointer and
4877 reset the stack pointer to what it was at function entry
4878 (label will restore stack pointer in inner scopes) */
4880 gen_vla_sp_restore(vla_sp_root_loc
);
4882 if (s
->r
& LABEL_FORWARD
)
4883 s
->jnext
= gjmp(s
->jnext
);
4885 gjmp_addr(s
->jnext
);
4888 expect("label identifier");
4891 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4897 if (vla_flags
& VLA_IN_SCOPE
) {
4898 /* save/restore stack pointer across label
4899 this is a no-op when combined with the load immediately
4900 after the label unless we arrive via goto */
4905 if (s
->r
== LABEL_DEFINED
)
4906 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4908 s
->r
= LABEL_DEFINED
;
4910 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4913 if (vla_flags
& VLA_IN_SCOPE
) {
4914 gen_vla_sp_restore(*vla_sp_loc
);
4915 vla_flags
|= VLA_NEED_NEW_FRAME
;
4917 /* we accept this, but it is a mistake */
4920 tcc_warning("deprecated use of label at end of compound statement");
4924 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4927 /* expression case */
4942 /* t is the array or struct type. c is the array or struct
4943 address. cur_index/cur_field is the pointer to the current
4944 value. 'size_only' is true if only size info is needed (only used
4946 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4947 int *cur_index
, Sym
**cur_field
,
4951 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4957 if (gnu_ext
&& (l
= is_label()) != 0)
4959 while (tok
== '[' || tok
== '.') {
4961 if (!(type
->t
& VT_ARRAY
))
4962 expect("array type");
4965 index
= expr_const();
4966 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4967 expect("invalid index");
4968 if (tok
== TOK_DOTS
&& gnu_ext
) {
4970 index_last
= expr_const();
4971 if (index_last
< 0 ||
4972 (s
->c
>= 0 && index_last
>= s
->c
) ||
4974 expect("invalid index");
4980 *cur_index
= index_last
;
4981 type
= pointed_type(type
);
4982 elem_size
= type_size(type
, &align
);
4983 c
+= index
* elem_size
;
4984 /* NOTE: we only support ranges for last designator */
4985 nb_elems
= index_last
- index
+ 1;
4986 if (nb_elems
!= 1) {
4995 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4996 expect("struct/union type");
5009 /* XXX: fix this mess by using explicit storage field */
5011 type1
.t
|= (type
->t
& ~VT_TYPE
);
5025 if (type
->t
& VT_ARRAY
) {
5027 type
= pointed_type(type
);
5028 c
+= index
* type_size(type
, &align
);
5032 tcc_error("too many field init");
5033 /* XXX: fix this mess by using explicit storage field */
5035 type1
.t
|= (type
->t
& ~VT_TYPE
);
5040 decl_initializer(type
, sec
, c
, 0, size_only
);
5042 /* XXX: make it more general */
5043 if (!size_only
&& nb_elems
> 1) {
5044 unsigned long c_end
;
5049 tcc_error("range init not supported yet for dynamic storage");
5050 c_end
= c
+ nb_elems
* elem_size
;
5051 if (c_end
> sec
->data_allocated
)
5052 section_realloc(sec
, c_end
);
5053 src
= sec
->data
+ c
;
5055 for(i
= 1; i
< nb_elems
; i
++) {
5057 memcpy(dst
, src
, elem_size
);
5063 #define EXPR_CONST 1
5066 /* store a value or an expression directly in global data or in local array */
5067 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5068 int v
, int expr_type
)
5070 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5072 unsigned long long bit_mask
;
5080 /* compound literals must be allocated globally in this case */
5081 saved_global_expr
= global_expr
;
5084 global_expr
= saved_global_expr
;
5085 /* NOTE: symbols are accepted */
5086 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5087 tcc_error("initializer element is not constant");
5095 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5098 /* XXX: not portable */
5099 /* XXX: generate error if incorrect relocation */
5100 gen_assign_cast(&dtype
);
5101 bt
= type
->t
& VT_BTYPE
;
5102 /* we'll write at most 12 bytes */
5103 if (c
+ 12 > sec
->data_allocated
) {
5104 section_realloc(sec
, c
+ 12);
5106 ptr
= sec
->data
+ c
;
5107 /* XXX: make code faster ? */
5108 if (!(type
->t
& VT_BITFIELD
)) {
5113 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5114 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5115 bit_mask
= (1LL << bit_size
) - 1;
5117 if ((vtop
->r
& VT_SYM
) &&
5123 (bt
== VT_INT
&& bit_size
!= 32)))
5124 tcc_error("initializer element is not computable at load time");
5127 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5129 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5132 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5135 *(double *)ptr
= vtop
->c
.d
;
5138 *(long double *)ptr
= vtop
->c
.ld
;
5141 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
5144 if (vtop
->r
& VT_SYM
) {
5145 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5147 *(addr_t
*)ptr
|= (vtop
->c
.ull
& bit_mask
) << bit_pos
;
5150 if (vtop
->r
& VT_SYM
) {
5151 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5153 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5158 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5165 /* put zeros for variable based init */
5166 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5169 /* nothing to do because globals are already set to zero */
5171 vpush_global_sym(&func_old_type
, TOK_memset
);
5173 #ifdef TCC_TARGET_ARM
5184 /* 't' contains the type and storage info. 'c' is the offset of the
5185 object in section 'sec'. If 'sec' is NULL, it means stack based
5186 allocation. 'first' is true if array '{' must be read (multi
5187 dimension implicit array init handling). 'size_only' is true if
5188 size only evaluation is wanted (only for arrays). */
5189 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5190 int first
, int size_only
)
5192 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5193 int size1
, align1
, expr_type
;
5197 if (type
->t
& VT_VLA
) {
5200 /* save current stack pointer */
5201 if (vla_flags
& VLA_NEED_NEW_FRAME
) {
5203 vla_flags
= VLA_IN_SCOPE
;
5204 vla_sp_loc
= &vla_sp_loc_tmp
;
5207 vla_runtime_type_size(type
, &a
);
5208 gen_vla_alloc(type
, a
);
5209 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5213 } else if (type
->t
& VT_ARRAY
) {
5217 t1
= pointed_type(type
);
5218 size1
= type_size(t1
, &align1
);
5221 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5224 tcc_error("character array initializer must be a literal,"
5225 " optionally enclosed in braces");
5230 /* only parse strings here if correct type (otherwise: handle
5231 them as ((w)char *) expressions */
5232 if ((tok
== TOK_LSTR
&&
5233 #ifdef TCC_TARGET_PE
5234 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5236 (t1
->t
& VT_BTYPE
) == VT_INT
5238 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5239 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5244 /* compute maximum number of chars wanted */
5246 cstr_len
= cstr
->size
;
5248 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5251 if (n
>= 0 && nb
> (n
- array_length
))
5252 nb
= n
- array_length
;
5255 tcc_warning("initializer-string for array is too long");
5256 /* in order to go faster for common case (char
5257 string in global variable, we handle it
5259 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5260 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5264 ch
= ((unsigned char *)cstr
->data
)[i
];
5266 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5267 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5275 /* only add trailing zero if enough storage (no
5276 warning in this case since it is standard) */
5277 if (n
< 0 || array_length
< n
) {
5279 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5285 while (tok
!= '}') {
5286 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5287 if (n
>= 0 && index
>= n
)
5288 tcc_error("index too large");
5289 /* must put zero in holes (note that doing it that way
5290 ensures that it even works with designators) */
5291 if (!size_only
&& array_length
< index
) {
5292 init_putz(t1
, sec
, c
+ array_length
* size1
,
5293 (index
- array_length
) * size1
);
5296 if (index
> array_length
)
5297 array_length
= index
;
5298 /* special test for multi dimensional arrays (may not
5299 be strictly correct if designators are used at the
5301 if (index
>= n
&& no_oblock
)
5310 /* put zeros at the end */
5311 if (!size_only
&& n
>= 0 && array_length
< n
) {
5312 init_putz(t1
, sec
, c
+ array_length
* size1
,
5313 (n
- array_length
) * size1
);
5315 /* patch type size if needed */
5317 s
->c
= array_length
;
5318 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5319 (sec
|| !first
|| tok
== '{')) {
5322 /* NOTE: the previous test is a specific case for automatic
5323 struct/union init */
5324 /* XXX: union needs only one init */
5326 /* XXX: this test is incorrect for local initializers
5327 beginning with ( without {. It would be much more difficult
5328 to do it correctly (ideally, the expression parser should
5329 be used in all cases) */
5335 while (tok
== '(') {
5339 if (!parse_btype(&type1
, &ad1
))
5341 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5343 if (!is_assignable_types(type
, &type1
))
5344 tcc_error("invalid type for cast");
5349 if (first
|| tok
== '{') {
5358 while (tok
!= '}') {
5359 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5361 if (!size_only
&& array_length
< index
) {
5362 init_putz(type
, sec
, c
+ array_length
,
5363 index
- array_length
);
5365 index
= index
+ type_size(&f
->type
, &align1
);
5366 if (index
> array_length
)
5367 array_length
= index
;
5369 /* gr: skip fields from same union - ugly. */
5371 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5372 /* test for same offset */
5373 if (f
->next
->c
!= f
->c
)
5375 /* if yes, test for bitfield shift */
5376 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5377 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5378 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5379 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5380 if (bit_pos_1
!= bit_pos_2
)
5387 if (no_oblock
&& f
== NULL
)
5393 /* put zeros at the end */
5394 if (!size_only
&& array_length
< n
) {
5395 init_putz(type
, sec
, c
+ array_length
,
5404 } else if (tok
== '{') {
5406 decl_initializer(type
, sec
, c
, first
, size_only
);
5408 } else if (size_only
) {
5409 /* just skip expression */
5410 parlevel
= parlevel1
= 0;
5411 while ((parlevel
> 0 || parlevel1
> 0 ||
5412 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5415 else if (tok
== ')')
5417 else if (tok
== '{')
5419 else if (tok
== '}')
5424 /* currently, we always use constant expression for globals
5425 (may change for scripting case) */
5426 expr_type
= EXPR_CONST
;
5428 expr_type
= EXPR_ANY
;
5429 init_putv(type
, sec
, c
, 0, expr_type
);
5433 /* parse an initializer for type 't' if 'has_init' is non zero, and
5434 allocate space in local or global data space ('r' is either
5435 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5436 variable 'v' with an associated name represented by 'asm_label' of
5437 scope 'scope' is declared before initializers are parsed. If 'v' is
5438 zero, then a reference to the new object is put in the value stack.
5439 If 'has_init' is 2, a special parsing is done to handle string
5441 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5442 int has_init
, int v
, char *asm_label
,
5445 int size
, align
, addr
, data_offset
;
5447 ParseState saved_parse_state
= {0};
5448 TokenString init_str
;
5450 Sym
*flexible_array
;
5452 flexible_array
= NULL
;
5453 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5454 Sym
*field
= type
->ref
->next
;
5457 field
= field
->next
;
5458 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5459 flexible_array
= field
;
5463 size
= type_size(type
, &align
);
5464 /* If unknown size, we must evaluate it before
5465 evaluating initializers because
5466 initializers can generate global data too
5467 (e.g. string pointers or ISOC99 compound
5468 literals). It also simplifies local
5469 initializers handling */
5470 tok_str_new(&init_str
);
5471 if (size
< 0 || (flexible_array
&& has_init
)) {
5473 tcc_error("unknown type size");
5474 /* get all init string */
5475 if (has_init
== 2) {
5476 /* only get strings */
5477 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5478 tok_str_add_tok(&init_str
);
5483 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5485 tcc_error("unexpected end of file in initializer");
5486 tok_str_add_tok(&init_str
);
5489 else if (tok
== '}') {
5499 tok_str_add(&init_str
, -1);
5500 tok_str_add(&init_str
, 0);
5503 save_parse_state(&saved_parse_state
);
5505 macro_ptr
= init_str
.str
;
5507 decl_initializer(type
, NULL
, 0, 1, 1);
5508 /* prepare second initializer parsing */
5509 macro_ptr
= init_str
.str
;
5512 /* if still unknown size, error */
5513 size
= type_size(type
, &align
);
5515 tcc_error("unknown type size");
5518 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5519 /* take into account specified alignment if bigger */
5520 if (ad
->a
.aligned
) {
5521 if (ad
->a
.aligned
> align
)
5522 align
= ad
->a
.aligned
;
5523 } else if (ad
->a
.packed
) {
5526 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5528 #ifdef CONFIG_TCC_BCHECK
5529 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5533 loc
= (loc
- size
) & -align
;
5535 #ifdef CONFIG_TCC_BCHECK
5536 /* handles bounds */
5537 /* XXX: currently, since we do only one pass, we cannot track
5538 '&' operators, so we add only arrays */
5539 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5540 unsigned long *bounds_ptr
;
5541 /* add padding between regions */
5543 /* then add local bound info */
5544 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5545 bounds_ptr
[0] = addr
;
5546 bounds_ptr
[1] = size
;
5550 /* local variable */
5551 sym_push(v
, type
, r
, addr
);
5553 /* push local reference */
5554 vset(type
, r
, addr
);
5560 if (v
&& scope
== VT_CONST
) {
5561 /* see if the symbol was already defined */
5564 if (!is_compatible_types(&sym
->type
, type
))
5565 tcc_error("incompatible types for redefinition of '%s'",
5566 get_tok_str(v
, NULL
));
5567 if (sym
->type
.t
& VT_EXTERN
) {
5568 /* if the variable is extern, it was not allocated */
5569 sym
->type
.t
&= ~VT_EXTERN
;
5570 /* set array size if it was ommited in extern
5572 if ((sym
->type
.t
& VT_ARRAY
) &&
5573 sym
->type
.ref
->c
< 0 &&
5575 sym
->type
.ref
->c
= type
->ref
->c
;
5577 /* we accept several definitions of the same
5578 global variable. this is tricky, because we
5579 must play with the SHN_COMMON type of the symbol */
5580 /* XXX: should check if the variable was already
5581 initialized. It is incorrect to initialized it
5583 /* no init data, we won't add more to the symbol */
5590 /* allocate symbol in corresponding section */
5595 else if (tcc_state
->nocommon
)
5599 data_offset
= sec
->data_offset
;
5600 data_offset
= (data_offset
+ align
- 1) & -align
;
5602 /* very important to increment global pointer at this time
5603 because initializers themselves can create new initializers */
5604 data_offset
+= size
;
5605 #ifdef CONFIG_TCC_BCHECK
5606 /* add padding if bound check */
5607 if (tcc_state
->do_bounds_check
)
5610 sec
->data_offset
= data_offset
;
5611 /* allocate section space to put the data */
5612 if (sec
->sh_type
!= SHT_NOBITS
&&
5613 data_offset
> sec
->data_allocated
)
5614 section_realloc(sec
, data_offset
);
5615 /* align section if needed */
5616 if (align
> sec
->sh_addralign
)
5617 sec
->sh_addralign
= align
;
5619 addr
= 0; /* avoid warning */
5623 if (scope
!= VT_CONST
|| !sym
) {
5624 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5625 sym
->asm_label
= asm_label
;
5627 /* update symbol definition */
5629 put_extern_sym(sym
, sec
, addr
, size
);
5632 /* put a common area */
5633 put_extern_sym(sym
, NULL
, align
, size
);
5634 /* XXX: find a nicer way */
5635 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5636 esym
->st_shndx
= SHN_COMMON
;
5639 /* push global reference */
5640 sym
= get_sym_ref(type
, sec
, addr
, size
);
5641 vpushsym(type
, sym
);
5643 /* patch symbol weakness */
5644 if (type
->t
& VT_WEAK
)
5646 #ifdef CONFIG_TCC_BCHECK
5647 /* handles bounds now because the symbol must be defined
5648 before for the relocation */
5649 if (tcc_state
->do_bounds_check
) {
5650 unsigned long *bounds_ptr
;
5652 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5653 /* then add global bound info */
5654 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5655 bounds_ptr
[0] = 0; /* relocated */
5656 bounds_ptr
[1] = size
;
5660 if (has_init
|| (type
->t
& VT_VLA
)) {
5661 decl_initializer(type
, sec
, addr
, 1, 0);
5662 /* restore parse state if needed */
5664 tok_str_free(init_str
.str
);
5665 restore_parse_state(&saved_parse_state
);
5667 /* patch flexible array member size back to -1, */
5668 /* for possible subsequent similar declarations */
5670 flexible_array
->type
.ref
->c
= -1;
5675 static void put_func_debug(Sym
*sym
)
5680 /* XXX: we put here a dummy type */
5681 snprintf(buf
, sizeof(buf
), "%s:%c1",
5682 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5683 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5684 cur_text_section
, sym
->c
);
5685 /* //gr gdb wants a line at the function */
5686 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5691 /* parse an old style function declaration list */
5692 /* XXX: check multiple parameter */
5693 static void func_decl_list(Sym
*func_sym
)
5700 /* parse each declaration */
5701 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5702 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5703 if (!parse_btype(&btype
, &ad
))
5704 expect("declaration list");
5705 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5706 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5708 /* we accept no variable after */
5712 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5713 /* find parameter in function parameter list */
5716 if ((s
->v
& ~SYM_FIELD
) == v
)
5720 tcc_error("declaration for parameter '%s' but no such parameter",
5721 get_tok_str(v
, NULL
));
5723 /* check that no storage specifier except 'register' was given */
5724 if (type
.t
& VT_STORAGE
)
5725 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5726 convert_parameter_type(&type
);
5727 /* we can add the type (NOTE: it could be local to the function) */
5729 /* accept other parameters */
5740 /* parse a function defined by symbol 'sym' and generate its code in
5741 'cur_text_section' */
5742 static void gen_function(Sym
*sym
)
5744 int saved_nocode_wanted
= nocode_wanted
;
5746 ind
= cur_text_section
->data_offset
;
5747 /* NOTE: we patch the symbol size later */
5748 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5749 funcname
= get_tok_str(sym
->v
, NULL
);
5751 /* Initialize VLA state */
5752 vla_sp_loc
= &vla_sp_root_loc
;
5753 vla_flags
= VLA_NEED_NEW_FRAME
;
5754 /* put debug symbol */
5755 if (tcc_state
->do_debug
)
5756 put_func_debug(sym
);
5757 /* push a dummy symbol to enable local sym storage */
5758 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5759 gfunc_prolog(&sym
->type
);
5761 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5764 cur_text_section
->data_offset
= ind
;
5765 label_pop(&global_label_stack
, NULL
);
5766 /* reset local stack */
5767 scope_stack_bottom
= NULL
;
5768 sym_pop(&local_stack
, NULL
);
5769 /* end of function */
5770 /* patch symbol size */
5771 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5773 /* patch symbol weakness (this definition overrules any prototype) */
5774 if (sym
->type
.t
& VT_WEAK
)
5776 if (tcc_state
->do_debug
) {
5777 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5779 /* It's better to crash than to generate wrong code */
5780 cur_text_section
= NULL
;
5781 funcname
= ""; /* for safety */
5782 func_vt
.t
= VT_VOID
; /* for safety */
5783 func_var
= 0; /* for safety */
5784 ind
= 0; /* for safety */
5785 nocode_wanted
= saved_nocode_wanted
;
5788 ST_FUNC
void gen_inline_functions(void)
5791 int *str
, inline_generated
, i
;
5792 struct InlineFunc
*fn
;
5794 /* iterate while inline function are referenced */
5796 inline_generated
= 0;
5797 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5798 fn
= tcc_state
->inline_fns
[i
];
5800 if (sym
&& sym
->c
) {
5801 /* the function was used: generate its code and
5802 convert it to a normal function */
5803 str
= fn
->token_str
;
5806 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5807 sym
->r
= VT_SYM
| VT_CONST
;
5808 sym
->type
.t
&= ~VT_INLINE
;
5812 cur_text_section
= text_section
;
5814 macro_ptr
= NULL
; /* fail safe */
5816 inline_generated
= 1;
5819 if (!inline_generated
)
5822 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5823 fn
= tcc_state
->inline_fns
[i
];
5824 str
= fn
->token_str
;
5827 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5830 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5831 static int decl0(int l
, int is_for_loop_init
)
5839 if (!parse_btype(&btype
, &ad
)) {
5840 if (is_for_loop_init
)
5842 /* skip redundant ';' */
5843 /* XXX: find more elegant solution */
5848 if (l
== VT_CONST
&&
5849 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5850 /* global asm block */
5854 /* special test for old K&R protos without explicit int
5855 type. Only accepted when defining global data */
5856 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5860 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5861 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5863 /* we accept no variable after */
5867 while (1) { /* iterate thru each declaration */
5868 char *asm_label
; // associated asm label
5870 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5874 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5875 printf("type = '%s'\n", buf
);
5878 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5879 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5880 tcc_error("function without file scope cannot be static");
5882 /* if old style function prototype, we accept a
5885 if (sym
->c
== FUNC_OLD
)
5886 func_decl_list(sym
);
5890 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5893 asm_label_instr(&astr
);
5894 asm_label
= tcc_strdup(astr
.data
);
5897 /* parse one last attribute list, after asm label */
5898 parse_attribute(&ad
);
5903 #ifdef TCC_TARGET_PE
5904 if (ad
.a
.func_import
)
5905 type
.t
|= VT_IMPORT
;
5906 if (ad
.a
.func_export
)
5907 type
.t
|= VT_EXPORT
;
5911 tcc_error("cannot use local functions");
5912 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5913 expect("function definition");
5915 /* reject abstract declarators in function definition */
5917 while ((sym
= sym
->next
) != NULL
)
5918 if (!(sym
->v
& ~SYM_FIELD
))
5919 expect("identifier");
5921 /* XXX: cannot do better now: convert extern line to static inline */
5922 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5923 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5928 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5931 ref
= sym
->type
.ref
;
5932 if (0 == ref
->a
.func_proto
)
5933 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
5935 /* use func_call from prototype if not defined */
5936 if (ref
->a
.func_call
!= FUNC_CDECL
5937 && type
.ref
->a
.func_call
== FUNC_CDECL
)
5938 type
.ref
->a
.func_call
= ref
->a
.func_call
;
5940 /* use export from prototype */
5941 if (ref
->a
.func_export
)
5942 type
.ref
->a
.func_export
= 1;
5944 /* use static from prototype */
5945 if (sym
->type
.t
& VT_STATIC
)
5946 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5948 if (!is_compatible_types(&sym
->type
, &type
)) {
5950 tcc_error("incompatible types for redefinition of '%s'",
5951 get_tok_str(v
, NULL
));
5953 type
.ref
->a
.func_proto
= 0;
5954 /* if symbol is already defined, then put complete type */
5957 /* put function symbol */
5958 sym
= global_identifier_push(v
, type
.t
, 0);
5959 sym
->type
.ref
= type
.ref
;
5962 /* static inline functions are just recorded as a kind
5963 of macro. Their code will be emitted at the end of
5964 the compilation unit only if they are used */
5965 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5966 (VT_INLINE
| VT_STATIC
)) {
5967 TokenString func_str
;
5969 struct InlineFunc
*fn
;
5970 const char *filename
;
5972 tok_str_new(&func_str
);
5978 tcc_error("unexpected end of file");
5979 tok_str_add_tok(&func_str
);
5984 } else if (t
== '}') {
5986 if (block_level
== 0)
5990 tok_str_add(&func_str
, -1);
5991 tok_str_add(&func_str
, 0);
5992 filename
= file
? file
->filename
: "";
5993 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5994 strcpy(fn
->filename
, filename
);
5996 fn
->token_str
= func_str
.str
;
5997 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6000 /* compute text section */
6001 cur_text_section
= ad
.section
;
6002 if (!cur_text_section
)
6003 cur_text_section
= text_section
;
6004 sym
->r
= VT_SYM
| VT_CONST
;
6009 if (btype
.t
& VT_TYPEDEF
) {
6010 /* save typedefed type */
6011 /* XXX: test storage specifiers ? */
6012 sym
= sym_push(v
, &type
, 0, 0);
6014 sym
->type
.t
|= VT_TYPEDEF
;
6017 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6018 /* external function definition */
6019 /* specific case for func_call attribute */
6020 ad
.a
.func_proto
= 1;
6022 } else if (!(type
.t
& VT_ARRAY
)) {
6023 /* not lvalue if array */
6024 r
|= lvalue_type(type
.t
);
6026 has_init
= (tok
== '=');
6027 if (has_init
&& (type
.t
& VT_VLA
))
6028 tcc_error("Variable length array cannot be initialized");
6029 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6030 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6031 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6032 /* external variable or function */
6033 /* NOTE: as GCC, uninitialized global static
6034 arrays of null size are considered as
6036 sym
= external_sym(v
, &type
, r
, asm_label
);
6038 if (type
.t
& VT_WEAK
)
6041 if (ad
.alias_target
) {
6046 alias_target
= sym_find(ad
.alias_target
);
6047 if (!alias_target
|| !alias_target
->c
)
6048 tcc_error("unsupported forward __alias__ attribute");
6049 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6050 tsec
.sh_num
= esym
->st_shndx
;
6051 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6054 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6055 if (type
.t
& VT_STATIC
)
6061 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
6065 if (is_for_loop_init
)
6078 ST_FUNC
void decl(int l
)