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 /* Return a static symbol pointing to a section */
373 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
379 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
380 sym
->type
.ref
= type
->ref
;
381 sym
->r
= VT_CONST
| VT_SYM
;
382 put_extern_sym(sym
, sec
, offset
, size
);
386 /* push a reference to a section offset by adding a dummy symbol */
387 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
392 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
393 vtop
->sym
= get_sym_ref(type
, sec
, offset
, size
);
396 /* define a new external reference to a symbol 'v' of type 'u' */
397 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
403 /* push forward reference */
404 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
405 s
->type
.ref
= type
->ref
;
406 s
->r
= r
| VT_CONST
| VT_SYM
;
411 /* define a new external reference to a symbol 'v' with alternate asm
412 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
413 is no alternate name (most cases) */
414 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
420 /* push forward reference */
421 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
422 s
->asm_label
= asm_label
;
423 s
->type
.t
|= VT_EXTERN
;
424 } else if (s
->type
.ref
== func_old_type
.ref
) {
425 s
->type
.ref
= type
->ref
;
426 s
->r
= r
| VT_CONST
| VT_SYM
;
427 s
->type
.t
|= VT_EXTERN
;
428 } else if (!is_compatible_types(&s
->type
, type
)) {
429 tcc_error("incompatible types for redefinition of '%s'",
430 get_tok_str(v
, NULL
));
435 /* push a reference to global symbol v */
436 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
441 sym
= external_global_sym(v
, type
, 0);
443 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
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_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_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_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1625 tmp_type2
.t
&= ~(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 else if (dbt
!= VT_LLONG
) {
1954 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1956 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1958 #ifdef TCC_TARGET_X86_64
1959 if (!(dbt
& (VT_PTR
|VT_LLONG
|VT_FUNC
|VT_STRUCT
)))
1961 if(dbt
& VT_UNSIGNED
)
1962 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1964 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1967 } else if (p
&& dbt
== VT_BOOL
) {
1970 } else if (!nocode_wanted
) {
1971 /* non constant case: generate code */
1973 /* convert from fp to fp */
1976 /* convert int to fp */
1979 /* convert fp to int */
1980 if (dbt
== VT_BOOL
) {
1984 /* we handle char/short/etc... with generic code */
1985 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1986 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1990 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1991 /* additional cast for char/short... */
1996 #ifndef TCC_TARGET_X86_64
1997 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1998 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1999 /* scalar to long long */
2000 /* machine independent conversion */
2002 /* generate high word */
2003 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2007 if (sbt
== VT_PTR
) {
2008 /* cast from pointer to int before we apply
2009 shift operation, which pointers don't support*/
2010 gen_cast(&int_type
);
2016 /* patch second register */
2017 vtop
[-1].r2
= vtop
->r
;
2021 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2022 (dbt
& VT_BTYPE
) == VT_PTR
||
2023 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2024 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2025 (sbt
& VT_BTYPE
) != VT_PTR
&&
2026 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2027 /* need to convert from 32bit to 64bit */
2029 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2030 /* x86_64 specific: movslq */
2032 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2036 } else if (dbt
== VT_BOOL
) {
2037 /* scalar to bool */
2040 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2041 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2042 if (sbt
== VT_PTR
) {
2043 vtop
->type
.t
= VT_INT
;
2044 tcc_warning("nonportable conversion from pointer to char/short");
2046 force_charshort_cast(dbt
);
2047 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2049 if (sbt
== VT_LLONG
) {
2050 /* from long long: just take low order word */
2054 /* if lvalue and single word type, nothing to do because
2055 the lvalue already contains the real type size (see
2056 VT_LVAL_xxx constants) */
2059 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2060 /* if we are casting between pointer types,
2061 we must update the VT_LVAL_xxx size */
2062 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2063 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2068 /* return type size as known at compile time. Put alignment at 'a' */
2069 ST_FUNC
int type_size(CType
*type
, int *a
)
2074 bt
= type
->t
& VT_BTYPE
;
2075 if (bt
== VT_STRUCT
) {
2080 } else if (bt
== VT_PTR
) {
2081 if (type
->t
& VT_ARRAY
) {
2085 ts
= type_size(&s
->type
, a
);
2087 if (ts
< 0 && s
->c
< 0)
2095 } else if (bt
== VT_LDOUBLE
) {
2097 return LDOUBLE_SIZE
;
2098 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2099 #ifdef TCC_TARGET_I386
2100 #ifdef TCC_TARGET_PE
2105 #elif defined(TCC_TARGET_ARM)
2115 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2118 } else if (bt
== VT_SHORT
) {
2121 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2125 /* char, void, function, _Bool */
2131 /* push type size as known at runtime time on top of value stack. Put
2133 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2135 if (type
->t
& VT_VLA
) {
2136 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2138 vpushi(type_size(type
, a
));
2142 static void vla_sp_save(void) {
2143 if (!(vla_flags
& VLA_SP_LOC_SET
)) {
2144 *vla_sp_loc
= (loc
-= PTR_SIZE
);
2145 vla_flags
|= VLA_SP_LOC_SET
;
2147 if (!(vla_flags
& VLA_SP_SAVED
)) {
2148 gen_vla_sp_save(*vla_sp_loc
);
2149 vla_flags
|= VLA_SP_SAVED
;
2153 /* return the pointed type of t */
2154 static inline CType
*pointed_type(CType
*type
)
2156 return &type
->ref
->type
;
2159 /* modify type so that its it is a pointer to type. */
2160 ST_FUNC
void mk_pointer(CType
*type
)
2163 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2164 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2168 /* compare function types. OLD functions match any new functions */
2169 static int is_compatible_func(CType
*type1
, CType
*type2
)
2175 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2177 /* check func_call */
2178 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2180 /* XXX: not complete */
2181 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2185 while (s1
!= NULL
) {
2188 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2198 /* return true if type1 and type2 are the same. If unqualified is
2199 true, qualifiers on the types are ignored.
2201 - enums are not checked as gcc __builtin_types_compatible_p ()
2203 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2207 t1
= type1
->t
& VT_TYPE
;
2208 t2
= type2
->t
& VT_TYPE
;
2210 /* strip qualifiers before comparing */
2211 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2212 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2214 /* XXX: bitfields ? */
2217 /* test more complicated cases */
2218 bt1
= t1
& VT_BTYPE
;
2219 if (bt1
== VT_PTR
) {
2220 type1
= pointed_type(type1
);
2221 type2
= pointed_type(type2
);
2222 return is_compatible_types(type1
, type2
);
2223 } else if (bt1
== VT_STRUCT
) {
2224 return (type1
->ref
== type2
->ref
);
2225 } else if (bt1
== VT_FUNC
) {
2226 return is_compatible_func(type1
, type2
);
2232 /* return true if type1 and type2 are exactly the same (including
2235 static int is_compatible_types(CType
*type1
, CType
*type2
)
2237 return compare_types(type1
,type2
,0);
2240 /* return true if type1 and type2 are the same (ignoring qualifiers).
2242 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2244 return compare_types(type1
,type2
,1);
2247 /* print a type. If 'varstr' is not NULL, then the variable is also
2248 printed in the type */
2250 /* XXX: add array and function pointers */
2251 static void type_to_str(char *buf
, int buf_size
,
2252 CType
*type
, const char *varstr
)
2259 t
= type
->t
& VT_TYPE
;
2262 if (t
& VT_CONSTANT
)
2263 pstrcat(buf
, buf_size
, "const ");
2264 if (t
& VT_VOLATILE
)
2265 pstrcat(buf
, buf_size
, "volatile ");
2266 if (t
& VT_UNSIGNED
)
2267 pstrcat(buf
, buf_size
, "unsigned ");
2297 tstr
= "long double";
2299 pstrcat(buf
, buf_size
, tstr
);
2303 if (bt
== VT_STRUCT
)
2307 pstrcat(buf
, buf_size
, tstr
);
2308 v
= type
->ref
->v
& ~SYM_STRUCT
;
2309 if (v
>= SYM_FIRST_ANOM
)
2310 pstrcat(buf
, buf_size
, "<anonymous>");
2312 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2316 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2317 pstrcat(buf
, buf_size
, "(");
2319 while (sa
!= NULL
) {
2320 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2321 pstrcat(buf
, buf_size
, buf1
);
2324 pstrcat(buf
, buf_size
, ", ");
2326 pstrcat(buf
, buf_size
, ")");
2330 pstrcpy(buf1
, sizeof(buf1
), "*");
2332 pstrcat(buf1
, sizeof(buf1
), varstr
);
2333 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2337 pstrcat(buf
, buf_size
, " ");
2338 pstrcat(buf
, buf_size
, varstr
);
2343 /* verify type compatibility to store vtop in 'dt' type, and generate
2345 static void gen_assign_cast(CType
*dt
)
2347 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2348 char buf1
[256], buf2
[256];
2351 st
= &vtop
->type
; /* source type */
2352 dbt
= dt
->t
& VT_BTYPE
;
2353 sbt
= st
->t
& VT_BTYPE
;
2354 if (sbt
== VT_VOID
|| dbt
== VT_VOID
)
2355 tcc_error("cannot cast from/to void");
2356 if (dt
->t
& VT_CONSTANT
)
2357 tcc_warning("assignment of read-only location");
2360 /* special cases for pointers */
2361 /* '0' can also be a pointer */
2362 if (is_null_pointer(vtop
))
2364 /* accept implicit pointer to integer cast with warning */
2365 if (is_integer_btype(sbt
)) {
2366 tcc_warning("assignment makes pointer from integer without a cast");
2369 type1
= pointed_type(dt
);
2370 /* a function is implicitely a function pointer */
2371 if (sbt
== VT_FUNC
) {
2372 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2373 !is_compatible_types(pointed_type(dt
), st
))
2374 tcc_warning("assignment from incompatible pointer type");
2379 type2
= pointed_type(st
);
2380 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2381 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2382 /* void * can match anything */
2384 /* exact type match, except for unsigned */
2387 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2388 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2389 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2390 tcc_warning("assignment from incompatible pointer type");
2392 /* check const and volatile */
2393 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2394 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2395 tcc_warning("assignment discards qualifiers from pointer target type");
2401 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2402 tcc_warning("assignment makes integer from pointer without a cast");
2404 /* XXX: more tests */
2409 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2410 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2411 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2413 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2414 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2415 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2423 /* store vtop in lvalue pushed on stack */
2424 ST_FUNC
void vstore(void)
2426 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2428 ft
= vtop
[-1].type
.t
;
2429 sbt
= vtop
->type
.t
& VT_BTYPE
;
2430 dbt
= ft
& VT_BTYPE
;
2431 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2432 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2433 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2434 /* optimize char/short casts */
2435 delayed_cast
= VT_MUSTCAST
;
2436 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2437 /* XXX: factorize */
2438 if (ft
& VT_CONSTANT
)
2439 tcc_warning("assignment of read-only location");
2442 if (!(ft
& VT_BITFIELD
))
2443 gen_assign_cast(&vtop
[-1].type
);
2446 if (sbt
== VT_STRUCT
) {
2447 /* if structure, only generate pointer */
2448 /* structure assignment : generate memcpy */
2449 /* XXX: optimize if small size */
2450 if (!nocode_wanted
) {
2451 size
= type_size(&vtop
->type
, &align
);
2455 vtop
->type
.t
= VT_PTR
;
2458 /* address of memcpy() */
2461 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2462 else if(!(align
& 3))
2463 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2466 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2471 vtop
->type
.t
= VT_PTR
;
2480 /* leave source on stack */
2481 } else if (ft
& VT_BITFIELD
) {
2482 /* bitfield store handling */
2483 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2484 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2485 /* remove bit field info to avoid loops */
2486 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2488 /* duplicate source into other register */
2493 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2494 gen_cast(&vtop
[-1].type
);
2495 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2498 /* duplicate destination */
2500 vtop
[-1] = vtop
[-2];
2502 /* mask and shift source */
2503 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2504 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2505 vpushll((1ULL << bit_size
) - 1ULL);
2507 vpushi((1 << bit_size
) - 1);
2513 /* load destination, mask and or with source */
2515 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2516 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2518 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2525 /* pop off shifted source from "duplicate source..." above */
2529 #ifdef CONFIG_TCC_BCHECK
2530 /* bound check case */
2531 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2537 if (!nocode_wanted
) {
2541 #ifdef TCC_TARGET_X86_64
2542 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2544 } else if ((ft
& VT_BTYPE
) == VT_QFLOAT
) {
2549 r
= gv(rc
); /* generate value */
2550 /* if lvalue was saved on stack, must read it */
2551 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2553 t
= get_reg(RC_INT
);
2554 #ifdef TCC_TARGET_X86_64
2559 sv
.r
= VT_LOCAL
| VT_LVAL
;
2560 sv
.c
.ul
= vtop
[-1].c
.ul
;
2562 vtop
[-1].r
= t
| VT_LVAL
;
2564 /* two word case handling : store second register at word + 4 (or +8 for x86-64) */
2565 #ifdef TCC_TARGET_X86_64
2566 if (((ft
& VT_BTYPE
) == VT_QLONG
) || ((ft
& VT_BTYPE
) == VT_QFLOAT
)) {
2567 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2569 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2570 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
2572 vtop
[-1].type
.t
= load_type
;
2575 /* convert to int to increment easily */
2576 vtop
->type
.t
= addr_type
;
2582 vtop
[-1].type
.t
= load_type
;
2583 /* XXX: it works because r2 is spilled last ! */
2584 store(vtop
->r2
, vtop
- 1);
2590 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2591 vtop
->r
|= delayed_cast
;
2595 /* post defines POST/PRE add. c is the token ++ or -- */
2596 ST_FUNC
void inc(int post
, int c
)
2599 vdup(); /* save lvalue */
2601 gv_dup(); /* duplicate value */
2606 vpushi(c
- TOK_MID
);
2608 vstore(); /* store value */
2610 vpop(); /* if post op, return saved value */
2613 /* Parse GNUC __attribute__ extension. Currently, the following
2614 extensions are recognized:
2615 - aligned(n) : set data/function alignment.
2616 - packed : force data alignment to 1
2617 - section(x) : generate data/code in this section.
2618 - unused : currently ignored, but may be used someday.
2619 - regparm(n) : pass function parameters in registers (i386 only)
2621 static void parse_attribute(AttributeDef
*ad
)
2625 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2629 while (tok
!= ')') {
2630 if (tok
< TOK_IDENT
)
2631 expect("attribute name");
2639 expect("section name");
2640 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2648 expect("alias(\"target\")");
2649 ad
->alias_target
= /* save string as token, for later */
2650 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2659 if (n
<= 0 || (n
& (n
- 1)) != 0)
2660 tcc_error("alignment must be a positive power of two");
2677 /* currently, no need to handle it because tcc does not
2678 track unused objects */
2682 /* currently, no need to handle it because tcc does not
2683 track unused objects */
2688 ad
->a
.func_call
= FUNC_CDECL
;
2693 ad
->a
.func_call
= FUNC_STDCALL
;
2695 #ifdef TCC_TARGET_I386
2705 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
2711 ad
->a
.func_call
= FUNC_FASTCALLW
;
2718 ad
->a
.mode
= VT_LLONG
+ 1;
2721 ad
->a
.mode
= VT_SHORT
+ 1;
2724 ad
->a
.mode
= VT_INT
+ 1;
2727 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2734 ad
->a
.func_export
= 1;
2737 ad
->a
.func_import
= 1;
2740 if (tcc_state
->warn_unsupported
)
2741 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2742 /* skip parameters */
2744 int parenthesis
= 0;
2748 else if (tok
== ')')
2751 } while (parenthesis
&& tok
!= -1);
2764 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2765 static void struct_decl(CType
*type
, int u
, int tdef
)
2767 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
;
2768 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2769 Sym
*s
, *ss
, *ass
, **ps
;
2773 a
= tok
; /* save decl type */
2778 /* struct already defined ? return it */
2780 expect("struct/union/enum name");
2784 tcc_error("invalid type");
2786 } else if (tok
>= TOK_IDENT
&& !tdef
)
2787 tcc_error("unknown struct/union/enum");
2793 /* we put an undefined size for struct/union */
2794 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2795 s
->r
= 0; /* default alignment is zero as gcc */
2796 /* put struct/union/enum name in type */
2804 tcc_error("struct/union/enum already defined");
2805 /* cannot be empty */
2807 /* non empty enums are not allowed */
2808 if (a
== TOK_ENUM
) {
2812 expect("identifier");
2815 tcc_error("redefinition of enumerator '%s'",
2816 get_tok_str(v
, NULL
));
2822 /* enum symbols have static storage */
2823 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2824 ss
->type
.t
|= VT_STATIC
;
2829 /* NOTE: we accept a trailing comma */
2833 s
->c
= type_size(&int_type
, &align
);
2842 while (tok
!= '}') {
2843 parse_btype(&btype
, &ad
);
2846 tcc_error("flexible array member '%s' not at the end of struct",
2847 get_tok_str(v
, NULL
));
2852 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2853 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2854 expect("identifier");
2855 if (type_size(&type1
, &align
) < 0) {
2856 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
2859 tcc_error("field '%s' has incomplete type",
2860 get_tok_str(v
, NULL
));
2862 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2863 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2864 tcc_error("invalid type for '%s'",
2865 get_tok_str(v
, NULL
));
2869 bit_size
= expr_const();
2870 /* XXX: handle v = 0 case for messages */
2872 tcc_error("negative width in bit-field '%s'",
2873 get_tok_str(v
, NULL
));
2874 if (v
&& bit_size
== 0)
2875 tcc_error("zero width for bit-field '%s'",
2876 get_tok_str(v
, NULL
));
2878 size
= type_size(&type1
, &align
);
2880 if (align
< ad
.a
.aligned
)
2881 align
= ad
.a
.aligned
;
2882 } else if (ad
.a
.packed
) {
2884 } else if (*tcc_state
->pack_stack_ptr
) {
2885 if (align
> *tcc_state
->pack_stack_ptr
)
2886 align
= *tcc_state
->pack_stack_ptr
;
2889 if (bit_size
>= 0) {
2890 bt
= type1
.t
& VT_BTYPE
;
2897 tcc_error("bitfields must have scalar type");
2899 if (bit_size
> bsize
) {
2900 tcc_error("width of '%s' exceeds its type",
2901 get_tok_str(v
, NULL
));
2902 } else if (bit_size
== bsize
) {
2903 /* no need for bit fields */
2905 } else if (bit_size
== 0) {
2906 /* XXX: what to do if only padding in a
2908 /* zero size: means to pad */
2911 /* we do not have enough room ?
2912 did the type change?
2914 if ((bit_pos
+ bit_size
) > bsize
||
2915 bt
!= prevbt
|| a
== TOK_UNION
)
2918 /* XXX: handle LSB first */
2919 type1
.t
|= VT_BITFIELD
|
2920 (bit_pos
<< VT_STRUCT_SHIFT
) |
2921 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2922 bit_pos
+= bit_size
;
2928 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2929 /* add new memory data only if starting
2931 if (lbit_pos
== 0) {
2932 if (a
== TOK_STRUCT
) {
2933 c
= (c
+ align
- 1) & -align
;
2942 if (align
> maxalign
)
2946 printf("add field %s offset=%d",
2947 get_tok_str(v
, NULL
), offset
);
2948 if (type1
.t
& VT_BITFIELD
) {
2949 printf(" pos=%d size=%d",
2950 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2951 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2956 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2958 while ((ass
= ass
->next
) != NULL
) {
2959 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2964 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2968 if (tok
== ';' || tok
== TOK_EOF
)
2975 /* store size and alignment */
2976 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2982 /* return 0 if no type declaration. otherwise, return the basic type
2985 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2987 int t
, u
, type_found
, typespec_found
, typedef_found
;
2991 memset(ad
, 0, sizeof(AttributeDef
));
2999 /* currently, we really ignore extension */
3009 if ((t
& VT_BTYPE
) != 0)
3010 tcc_error("too many basic types");
3026 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3027 #ifndef TCC_TARGET_PE
3028 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3030 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3031 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3045 if ((t
& VT_BTYPE
) == VT_LONG
) {
3046 #ifdef TCC_TARGET_PE
3047 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3049 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3057 struct_decl(&type1
, VT_ENUM
, t
& VT_TYPEDEF
);
3060 type
->ref
= type1
.ref
;
3064 struct_decl(&type1
, VT_STRUCT
, t
& VT_TYPEDEF
);
3067 /* type modifiers */
3120 /* GNUC attribute */
3121 case TOK_ATTRIBUTE1
:
3122 case TOK_ATTRIBUTE2
:
3123 parse_attribute(ad
);
3126 t
= (t
& ~VT_BTYPE
) | u
;
3134 parse_expr_type(&type1
);
3135 /* remove all storage modifiers except typedef */
3136 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3139 if (typespec_found
|| typedef_found
)
3142 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3145 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3146 type
->ref
= s
->type
.ref
;
3148 /* get attributes from typedef */
3149 if (0 == ad
->a
.aligned
)
3150 ad
->a
.aligned
= s
->a
.aligned
;
3151 if (0 == ad
->a
.func_call
)
3152 ad
->a
.func_call
= s
->a
.func_call
;
3153 ad
->a
.packed
|= s
->a
.packed
;
3162 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
3163 tcc_error("signed and unsigned modifier");
3164 if (tcc_state
->char_is_unsigned
) {
3165 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
3170 /* long is never used as type */
3171 if ((t
& VT_BTYPE
) == VT_LONG
)
3172 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3173 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3175 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3181 /* convert a function parameter type (array to pointer and function to
3182 function pointer) */
3183 static inline void convert_parameter_type(CType
*pt
)
3185 /* remove const and volatile qualifiers (XXX: const could be used
3186 to indicate a const function parameter */
3187 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3188 /* array must be transformed to pointer according to ANSI C */
3190 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3195 ST_FUNC
void parse_asm_str(CString
*astr
)
3198 /* read the string */
3200 expect("string constant");
3202 while (tok
== TOK_STR
) {
3203 /* XXX: add \0 handling too ? */
3204 cstr_cat(astr
, tokc
.cstr
->data
);
3207 cstr_ccat(astr
, '\0');
3210 /* Parse an asm label and return the label
3211 * Don't forget to free the CString in the caller! */
3212 static void asm_label_instr(CString
*astr
)
3215 parse_asm_str(astr
);
3218 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3222 static void post_type(CType
*type
, AttributeDef
*ad
)
3224 int n
, l
, t1
, arg_size
, align
;
3225 Sym
**plast
, *s
, *first
;
3230 /* function declaration */
3238 /* read param name and compute offset */
3239 if (l
!= FUNC_OLD
) {
3240 if (!parse_btype(&pt
, &ad1
)) {
3242 tcc_error("invalid type");
3249 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3251 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3252 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3253 tcc_error("parameter declared as void");
3254 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3259 expect("identifier");
3263 convert_parameter_type(&pt
);
3264 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3270 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3277 /* if no parameters, then old type prototype */
3281 /* NOTE: const is ignored in returned type as it has a special
3282 meaning in gcc / C++ */
3283 type
->t
&= ~VT_CONSTANT
;
3284 /* some ancient pre-K&R C allows a function to return an array
3285 and the array brackets to be put after the arguments, such
3286 that "int c()[]" means something like "int[] c()" */
3289 skip(']'); /* only handle simple "[]" */
3292 /* we push a anonymous symbol which will contain the function prototype */
3293 ad
->a
.func_args
= arg_size
;
3294 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3299 } else if (tok
== '[') {
3300 /* array definition */
3302 if (tok
== TOK_RESTRICT1
)
3307 if (!local_stack
|| nocode_wanted
)
3308 vpushi(expr_const());
3310 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3313 tcc_error("invalid array size");
3315 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3316 tcc_error("size of variable length array should be an integer");
3321 /* parse next post type */
3322 post_type(type
, ad
);
3323 if (type
->t
== VT_FUNC
)
3324 tcc_error("declaration of an array of functions");
3325 t1
|= type
->t
& VT_VLA
;
3328 loc
-= type_size(&int_type
, &align
);
3332 vla_runtime_type_size(type
, &align
);
3334 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3341 /* we push an anonymous symbol which will contain the array
3343 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3344 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3349 /* Parse a type declaration (except basic type), and return the type
3350 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3351 expected. 'type' should contain the basic type. 'ad' is the
3352 attribute definition of the basic type. It can be modified by
3355 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3358 CType type1
, *type2
;
3359 int qualifiers
, storage
;
3361 while (tok
== '*') {
3369 qualifiers
|= VT_CONSTANT
;
3374 qualifiers
|= VT_VOLATILE
;
3382 type
->t
|= qualifiers
;
3385 /* XXX: clarify attribute handling */
3386 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3387 parse_attribute(ad
);
3389 /* recursive type */
3390 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3391 type1
.t
= 0; /* XXX: same as int */
3394 /* XXX: this is not correct to modify 'ad' at this point, but
3395 the syntax is not clear */
3396 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3397 parse_attribute(ad
);
3398 type_decl(&type1
, ad
, v
, td
);
3401 /* type identifier */
3402 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3406 if (!(td
& TYPE_ABSTRACT
))
3407 expect("identifier");
3411 storage
= type
->t
& VT_STORAGE
;
3412 type
->t
&= ~VT_STORAGE
;
3413 if (storage
& VT_STATIC
) {
3414 int saved_nocode_wanted
= nocode_wanted
;
3416 post_type(type
, ad
);
3417 nocode_wanted
= saved_nocode_wanted
;
3419 post_type(type
, ad
);
3421 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3422 parse_attribute(ad
);
3426 /* append type at the end of type1 */
3439 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3440 ST_FUNC
int lvalue_type(int t
)
3445 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3447 else if (bt
== VT_SHORT
)
3451 if (t
& VT_UNSIGNED
)
3452 r
|= VT_LVAL_UNSIGNED
;
3456 /* indirection with full error checking and bound check */
3457 ST_FUNC
void indir(void)
3459 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3460 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3464 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3466 vtop
->type
= *pointed_type(&vtop
->type
);
3467 /* Arrays and functions are never lvalues */
3468 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3469 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3470 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3471 /* if bound checking, the referenced pointer must be checked */
3472 #ifdef CONFIG_TCC_BCHECK
3473 if (tcc_state
->do_bounds_check
)
3474 vtop
->r
|= VT_MUSTBOUND
;
3479 /* pass a parameter to a function and do type checking and casting */
3480 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3485 func_type
= func
->c
;
3486 if (func_type
== FUNC_OLD
||
3487 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3488 /* default casting : only need to convert float to double */
3489 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3493 } else if (arg
== NULL
) {
3494 tcc_error("too many arguments to function");
3497 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3498 gen_assign_cast(&type
);
3502 /* parse an expression of the form '(type)' or '(expr)' and return its
3504 static void parse_expr_type(CType
*type
)
3510 if (parse_btype(type
, &ad
)) {
3511 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3518 static void parse_type(CType
*type
)
3523 if (!parse_btype(type
, &ad
)) {
3526 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3529 static void vpush_tokc(int t
)
3534 vsetc(&type
, VT_CONST
, &tokc
);
3537 ST_FUNC
void unary(void)
3539 int n
, t
, align
, size
, r
, sizeof_caller
;
3543 static int in_sizeof
= 0;
3545 sizeof_caller
= in_sizeof
;
3547 /* XXX: GCC 2.95.3 does not generate a table although it should be
3561 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3565 vpush_tokc(VT_LLONG
);
3569 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3573 vpush_tokc(VT_FLOAT
);
3577 vpush_tokc(VT_DOUBLE
);
3581 vpush_tokc(VT_LDOUBLE
);
3584 case TOK___FUNCTION__
:
3586 goto tok_identifier
;
3592 /* special function name identifier */
3593 len
= strlen(funcname
) + 1;
3594 /* generate char[len] type */
3599 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3600 ptr
= section_ptr_add(data_section
, len
);
3601 memcpy(ptr
, funcname
, len
);
3606 #ifdef TCC_TARGET_PE
3607 t
= VT_SHORT
| VT_UNSIGNED
;
3613 /* string parsing */
3616 if (tcc_state
->warn_write_strings
)
3621 memset(&ad
, 0, sizeof(AttributeDef
));
3622 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3627 if (parse_btype(&type
, &ad
)) {
3628 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3630 /* check ISOC99 compound literal */
3632 /* data is allocated locally by default */
3637 /* all except arrays are lvalues */
3638 if (!(type
.t
& VT_ARRAY
))
3639 r
|= lvalue_type(type
.t
);
3640 memset(&ad
, 0, sizeof(AttributeDef
));
3641 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3643 if (sizeof_caller
) {
3650 } else if (tok
== '{') {
3651 /* save all registers */
3653 /* statement expression : we do not accept break/continue
3654 inside as GCC does */
3655 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3670 /* functions names must be treated as function pointers,
3671 except for unary '&' and sizeof. Since we consider that
3672 functions are not lvalues, we only have to handle it
3673 there and in function calls. */
3674 /* arrays can also be used although they are not lvalues */
3675 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3676 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3678 mk_pointer(&vtop
->type
);
3684 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3686 boolean
.t
= VT_BOOL
;
3688 vtop
->c
.i
= !vtop
->c
.i
;
3689 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3690 vtop
->c
.i
= vtop
->c
.i
^ 1;
3693 vseti(VT_JMP
, gvtst(1, 0));
3704 /* in order to force cast, we add zero */
3706 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3707 tcc_error("pointer not accepted for unary plus");
3717 unary_type(&type
); // Perform a in_sizeof = 0;
3718 size
= type_size(&type
, &align
);
3719 if (t
== TOK_SIZEOF
) {
3720 if (!(type
.t
& VT_VLA
)) {
3722 tcc_error("sizeof applied to an incomplete type");
3725 vla_runtime_type_size(&type
, &align
);
3730 vtop
->type
.t
|= VT_UNSIGNED
;
3733 case TOK_builtin_types_compatible_p
:
3742 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3743 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3744 vpushi(is_compatible_types(&type1
, &type2
));
3747 case TOK_builtin_constant_p
:
3749 int saved_nocode_wanted
, res
;
3752 saved_nocode_wanted
= nocode_wanted
;
3755 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3757 nocode_wanted
= saved_nocode_wanted
;
3762 case TOK_builtin_frame_address
:
3768 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3769 tcc_error("__builtin_frame_address only takes positive integers");
3776 vset(&type
, VT_LOCAL
, 0); /* local frame */
3778 mk_pointer(&vtop
->type
);
3779 indir(); /* -> parent frame */
3783 #ifdef TCC_TARGET_X86_64
3784 #ifdef TCC_TARGET_PE
3785 case TOK_builtin_va_start
:
3793 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
3794 tcc_error("__builtin_va_start expects a local variable");
3795 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
3796 vtop
->type
= char_pointer_type
;
3801 case TOK_builtin_va_arg_types
:
3808 vpushi(classify_x86_64_va_arg(&type
));
3823 t
= vtop
->type
.t
& VT_BTYPE
;
3825 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
&&
3828 vtop
->c
.f
= -vtop
->c
.f
;
3829 else if (t
== VT_DOUBLE
)
3830 vtop
->c
.d
= -vtop
->c
.d
;
3832 vtop
->c
.ld
= -vtop
->c
.ld
;
3841 goto tok_identifier
;
3843 /* allow to take the address of a label */
3844 if (tok
< TOK_UIDENT
)
3845 expect("label identifier");
3846 s
= label_find(tok
);
3848 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3850 if (s
->r
== LABEL_DECLARED
)
3851 s
->r
= LABEL_FORWARD
;
3854 s
->type
.t
= VT_VOID
;
3855 mk_pointer(&s
->type
);
3856 s
->type
.t
|= VT_STATIC
;
3858 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3863 // special qnan , snan and infinity values
3865 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3869 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3873 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3882 expect("identifier");
3886 tcc_error("'%s' undeclared", get_tok_str(t
, NULL
));
3887 /* for simple function calls, we tolerate undeclared
3888 external reference to int() function */
3889 if (tcc_state
->warn_implicit_function_declaration
)
3890 tcc_warning("implicit declaration of function '%s'",
3891 get_tok_str(t
, NULL
));
3892 s
= external_global_sym(t
, &func_old_type
, 0);
3894 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3895 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3896 /* if referencing an inline function, then we generate a
3897 symbol to it if not already done. It will have the
3898 effect to generate code for it at the end of the
3899 compilation unit. Inline function as always
3900 generated in the text section. */
3902 put_extern_sym(s
, text_section
, 0, 0);
3903 r
= VT_SYM
| VT_CONST
;
3907 vset(&s
->type
, r
, s
->c
);
3908 /* if forward reference, we must point to s */
3909 if (vtop
->r
& VT_SYM
) {
3911 #ifdef TCC_TARGET_X86_64
3912 s1
->vtop
->c
.ull
= 0;
3920 /* post operations */
3922 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3925 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3928 if (tok
== TOK_ARROW
)
3930 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3934 /* expect pointer on structure */
3935 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3936 expect("struct or union");
3940 while ((s
= s
->next
) != NULL
) {
3945 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3946 /* add field offset to pointer */
3947 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3950 /* change type to field type, and set to lvalue */
3951 vtop
->type
= s
->type
;
3952 vtop
->type
.t
|= qualifiers
;
3953 /* an array is never an lvalue */
3954 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3955 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3956 #ifdef CONFIG_TCC_BCHECK
3957 /* if bound checking, the referenced pointer must be checked */
3958 if (tcc_state
->do_bounds_check
)
3959 vtop
->r
|= VT_MUSTBOUND
;
3963 } else if (tok
== '[') {
3969 } else if (tok
== '(') {
3972 int nb_args
, ret_nregs
, ret_align
, variadic
;
3975 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3976 /* pointer test (no array accepted) */
3977 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3978 vtop
->type
= *pointed_type(&vtop
->type
);
3979 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3983 expect("function pointer");
3986 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3988 /* get return type */
3991 sa
= s
->next
; /* first parameter */
3994 /* compute first implicit argument if a structure is returned */
3995 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3996 variadic
= (s
->c
== FUNC_ELLIPSIS
);
3997 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4000 /* get some space for the returned structure */
4001 size
= type_size(&s
->type
, &align
);
4002 loc
= (loc
- size
) & -align
;
4004 ret
.r
= VT_LOCAL
| VT_LVAL
;
4005 /* pass it as 'int' to avoid structure arg passing
4007 vseti(VT_LOCAL
, loc
);
4017 /* return in register */
4018 if (is_float(ret
.type
.t
)) {
4019 ret
.r
= reg_fret(ret
.type
.t
);
4020 #ifdef TCC_TARGET_X86_64
4021 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4025 #ifdef TCC_TARGET_X86_64
4026 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4028 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4038 gfunc_param_typed(s
, sa
);
4048 tcc_error("too few arguments to function");
4050 if (!nocode_wanted
) {
4051 gfunc_call(nb_args
);
4053 vtop
-= (nb_args
+ 1);
4057 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4058 vsetc(&ret
.type
, r
, &ret
.c
);
4059 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4062 /* handle packed struct return */
4063 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4066 size
= type_size(&s
->type
, &align
);
4067 loc
= (loc
- size
) & -align
;
4071 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4075 if (--ret_nregs
== 0)
4077 /* XXX: compatible with arm only: ret_align == register_size */
4078 offset
+= ret_align
;
4080 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4088 ST_FUNC
void expr_prod(void)
4093 while (tok
== '*' || tok
== '/' || tok
== '%') {
4101 ST_FUNC
void expr_sum(void)
4106 while (tok
== '+' || tok
== '-') {
4114 static void expr_shift(void)
4119 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4127 static void expr_cmp(void)
4132 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4133 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4141 static void expr_cmpeq(void)
4146 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4154 static void expr_and(void)
4157 while (tok
== '&') {
4164 static void expr_xor(void)
4167 while (tok
== '^') {
4174 static void expr_or(void)
4177 while (tok
== '|') {
4184 /* XXX: fix this mess */
4185 static void expr_land_const(void)
4188 while (tok
== TOK_LAND
) {
4195 /* XXX: fix this mess */
4196 static void expr_lor_const(void)
4199 while (tok
== TOK_LOR
) {
4206 /* only used if non constant */
4207 static void expr_land(void)
4212 if (tok
== TOK_LAND
) {
4217 if (tok
!= TOK_LAND
) {
4227 static void expr_lor(void)
4232 if (tok
== TOK_LOR
) {
4237 if (tok
!= TOK_LOR
) {
4247 /* XXX: better constant handling */
4248 static void expr_cond(void)
4250 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4252 CType type
, type1
, type2
;
4259 boolean
.t
= VT_BOOL
;
4265 if (tok
!= ':' || !gnu_ext
) {
4280 if (vtop
!= vstack
) {
4281 /* needed to avoid having different registers saved in
4283 if (is_float(vtop
->type
.t
)) {
4285 #ifdef TCC_TARGET_X86_64
4286 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4296 if (tok
== ':' && gnu_ext
) {
4304 sv
= *vtop
; /* save value to handle it later */
4305 vtop
--; /* no vpop so that FP stack is not flushed */
4313 bt1
= t1
& VT_BTYPE
;
4315 bt2
= t2
& VT_BTYPE
;
4316 /* cast operands to correct type according to ISOC rules */
4317 if (is_float(bt1
) || is_float(bt2
)) {
4318 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4319 type
.t
= VT_LDOUBLE
;
4320 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4325 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4326 /* cast to biggest op */
4328 /* convert to unsigned if it does not fit in a long long */
4329 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4330 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4331 type
.t
|= VT_UNSIGNED
;
4332 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4333 /* If one is a null ptr constant the result type
4335 if (is_null_pointer (vtop
))
4337 else if (is_null_pointer (&sv
))
4339 /* XXX: test pointer compatibility, C99 has more elaborate
4343 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4344 /* XXX: test function pointer compatibility */
4345 type
= bt1
== VT_FUNC
? type1
: type2
;
4346 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4347 /* XXX: test structure compatibility */
4348 type
= bt1
== VT_STRUCT
? type1
: type2
;
4349 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4350 /* NOTE: as an extension, we accept void on only one side */
4353 /* integer operations */
4355 /* convert to unsigned if it does not fit in an integer */
4356 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4357 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4358 type
.t
|= VT_UNSIGNED
;
4361 /* now we convert second operand */
4363 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4366 if (is_float(type
.t
)) {
4368 #ifdef TCC_TARGET_X86_64
4369 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4373 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4374 /* for long longs, we use fixed registers to avoid having
4375 to handle a complicated move */
4380 /* this is horrible, but we must also convert first
4384 /* put again first value and cast it */
4387 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4390 move_reg(r2
, r1
, type
.t
);
4397 static void expr_eq(void)
4403 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4404 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4405 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4420 ST_FUNC
void gexpr(void)
4431 /* parse an expression and return its type without any side effect. */
4432 static void expr_type(CType
*type
)
4434 int saved_nocode_wanted
;
4436 saved_nocode_wanted
= nocode_wanted
;
4441 nocode_wanted
= saved_nocode_wanted
;
4444 /* parse a unary expression and return its type without any side
4446 static void unary_type(CType
*type
)
4458 /* parse a constant expression and return value in vtop. */
4459 static void expr_const1(void)
4468 /* parse an integer constant and return its value. */
4469 ST_FUNC
int expr_const(void)
4473 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4474 expect("constant expression");
4480 /* return the label token if current token is a label, otherwise
4482 static int is_label(void)
4486 /* fast test first */
4487 if (tok
< TOK_UIDENT
)
4489 /* no need to save tokc because tok is an identifier */
4496 unget_tok(last_tok
);
4501 static void label_or_decl(int l
)
4505 /* fast test first */
4506 if (tok
>= TOK_UIDENT
)
4508 /* no need to save tokc because tok is an identifier */
4512 unget_tok(last_tok
);
4515 unget_tok(last_tok
);
4520 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4521 int case_reg
, int is_expr
)
4524 Sym
*s
, *frame_bottom
;
4526 /* generate line number info */
4527 if (tcc_state
->do_debug
&&
4528 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4529 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4531 last_line_num
= file
->line_num
;
4535 /* default return value is (void) */
4537 vtop
->type
.t
= VT_VOID
;
4540 if (tok
== TOK_IF
) {
4547 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4549 if (c
== TOK_ELSE
) {
4553 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4554 gsym(d
); /* patch else jmp */
4557 } else if (tok
== TOK_WHILE
) {
4565 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4569 } else if (tok
== '{') {
4571 int block_vla_sp_loc
, *saved_vla_sp_loc
, saved_vla_flags
;
4574 /* record local declaration stack position */
4576 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4577 frame_bottom
->next
= scope_stack_bottom
;
4578 scope_stack_bottom
= frame_bottom
;
4579 llabel
= local_label_stack
;
4581 /* save VLA state */
4582 block_vla_sp_loc
= *(saved_vla_sp_loc
= vla_sp_loc
);
4583 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4584 vla_sp_loc
= &block_vla_sp_loc
;
4586 saved_vla_flags
= vla_flags
;
4587 vla_flags
|= VLA_NEED_NEW_FRAME
;
4589 /* handle local labels declarations */
4590 if (tok
== TOK_LABEL
) {
4593 if (tok
< TOK_UIDENT
)
4594 expect("label identifier");
4595 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4605 while (tok
!= '}') {
4606 label_or_decl(VT_LOCAL
);
4610 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4613 /* pop locally defined labels */
4614 label_pop(&local_label_stack
, llabel
);
4616 /* XXX: this solution makes only valgrind happy...
4617 triggered by gcc.c-torture/execute/20000917-1.c */
4619 switch(vtop
->type
.t
& VT_BTYPE
) {
4624 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4626 tcc_error("unsupported expression type");
4629 /* pop locally defined symbols */
4630 scope_stack_bottom
= scope_stack_bottom
->next
;
4631 sym_pop(&local_stack
, s
);
4633 /* Pop VLA frames and restore stack pointer if required */
4634 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4635 *saved_vla_sp_loc
= block_vla_sp_loc
;
4636 if (vla_sp_loc
!= (saved_vla_sp_loc
== &vla_sp_root_loc
? &vla_sp_root_loc
: &block_vla_sp_loc
)) {
4637 vla_sp_loc
= saved_vla_sp_loc
;
4638 gen_vla_sp_restore(*vla_sp_loc
);
4640 vla_flags
= (vla_flags
& ~VLA_SCOPE_FLAGS
) | (saved_vla_flags
& VLA_SCOPE_FLAGS
);
4643 } else if (tok
== TOK_RETURN
) {
4647 gen_assign_cast(&func_vt
);
4648 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4649 CType type
, ret_type
;
4650 int ret_align
, ret_nregs
;
4651 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
4653 if (0 == ret_nregs
) {
4654 /* if returning structure, must copy it to implicit
4655 first pointer arg location */
4658 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4661 /* copy structure value to pointer */
4664 /* returning structure packed into registers */
4665 int r
, size
, addr
, align
;
4666 size
= type_size(&func_vt
,&align
);
4667 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& (ret_align
-1)))
4668 && (align
& (ret_align
-1))) {
4669 loc
= (loc
- size
) & -align
;
4672 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4675 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
4677 vtop
->type
= ret_type
;
4678 if (is_float(ret_type
.t
))
4679 r
= rc_fret(ret_type
.t
);
4685 if (--ret_nregs
== 0)
4687 /* We assume that when a structure is returned in multiple
4688 registers, their classes are consecutive values of the
4691 /* XXX: compatible with arm only: ret_align == register_size */
4692 vtop
->c
.i
+= ret_align
;
4693 vtop
->r
= VT_LOCAL
| VT_LVAL
;
4696 } else if (is_float(func_vt
.t
)) {
4697 gv(rc_fret(func_vt
.t
));
4701 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4704 rsym
= gjmp(rsym
); /* jmp */
4705 } else if (tok
== TOK_BREAK
) {
4708 tcc_error("cannot break");
4709 *bsym
= gjmp(*bsym
);
4712 } else if (tok
== TOK_CONTINUE
) {
4715 tcc_error("cannot continue");
4716 *csym
= gjmp(*csym
);
4719 } else if (tok
== TOK_FOR
) {
4724 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4725 frame_bottom
->next
= scope_stack_bottom
;
4726 scope_stack_bottom
= frame_bottom
;
4728 /* c99 for-loop init decl? */
4729 if (!decl0(VT_LOCAL
, 1)) {
4730 /* no, regular for-loop init expr */
4754 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4758 scope_stack_bottom
= scope_stack_bottom
->next
;
4759 sym_pop(&local_stack
, s
);
4761 if (tok
== TOK_DO
) {
4766 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4777 if (tok
== TOK_SWITCH
) {
4781 /* XXX: other types than integer */
4782 case_reg
= gv(RC_INT
);
4786 b
= gjmp(0); /* jump to first case */
4788 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4789 /* if no default, jmp after switch */
4797 if (tok
== TOK_CASE
) {
4804 if (gnu_ext
&& tok
== TOK_DOTS
) {
4808 tcc_warning("empty case range");
4810 /* since a case is like a label, we must skip it with a jmp */
4817 *case_sym
= gtst(1, 0);
4820 *case_sym
= gtst(1, 0);
4824 *case_sym
= gtst(1, *case_sym
);
4829 goto block_after_label
;
4831 if (tok
== TOK_DEFAULT
) {
4837 tcc_error("too many 'default'");
4840 goto block_after_label
;
4842 if (tok
== TOK_GOTO
) {
4844 if (tok
== '*' && gnu_ext
) {
4848 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4851 } else if (tok
>= TOK_UIDENT
) {
4852 s
= label_find(tok
);
4853 /* put forward definition if needed */
4855 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4857 if (s
->r
== LABEL_DECLARED
)
4858 s
->r
= LABEL_FORWARD
;
4860 /* label already defined */
4861 if (vla_flags
& VLA_IN_SCOPE
) {
4862 /* If VLAs are in use, save the current stack pointer and
4863 reset the stack pointer to what it was at function entry
4864 (label will restore stack pointer in inner scopes) */
4866 gen_vla_sp_restore(vla_sp_root_loc
);
4868 if (s
->r
& LABEL_FORWARD
)
4869 s
->jnext
= gjmp(s
->jnext
);
4871 gjmp_addr(s
->jnext
);
4874 expect("label identifier");
4877 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4883 if (vla_flags
& VLA_IN_SCOPE
) {
4884 /* save/restore stack pointer across label
4885 this is a no-op when combined with the load immediately
4886 after the label unless we arrive via goto */
4891 if (s
->r
== LABEL_DEFINED
)
4892 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4894 s
->r
= LABEL_DEFINED
;
4896 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4899 if (vla_flags
& VLA_IN_SCOPE
) {
4900 gen_vla_sp_restore(*vla_sp_loc
);
4901 vla_flags
|= VLA_NEED_NEW_FRAME
;
4903 /* we accept this, but it is a mistake */
4906 tcc_warning("deprecated use of label at end of compound statement");
4910 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4913 /* expression case */
4928 /* t is the array or struct type. c is the array or struct
4929 address. cur_index/cur_field is the pointer to the current
4930 value. 'size_only' is true if only size info is needed (only used
4932 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4933 int *cur_index
, Sym
**cur_field
,
4937 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4943 if (gnu_ext
&& (l
= is_label()) != 0)
4945 while (tok
== '[' || tok
== '.') {
4947 if (!(type
->t
& VT_ARRAY
))
4948 expect("array type");
4951 index
= expr_const();
4952 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4953 expect("invalid index");
4954 if (tok
== TOK_DOTS
&& gnu_ext
) {
4956 index_last
= expr_const();
4957 if (index_last
< 0 ||
4958 (s
->c
>= 0 && index_last
>= s
->c
) ||
4960 expect("invalid index");
4966 *cur_index
= index_last
;
4967 type
= pointed_type(type
);
4968 elem_size
= type_size(type
, &align
);
4969 c
+= index
* elem_size
;
4970 /* NOTE: we only support ranges for last designator */
4971 nb_elems
= index_last
- index
+ 1;
4972 if (nb_elems
!= 1) {
4981 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4982 expect("struct/union type");
4995 /* XXX: fix this mess by using explicit storage field */
4997 type1
.t
|= (type
->t
& ~VT_TYPE
);
5011 if (type
->t
& VT_ARRAY
) {
5013 type
= pointed_type(type
);
5014 c
+= index
* type_size(type
, &align
);
5018 tcc_error("too many field init");
5019 /* XXX: fix this mess by using explicit storage field */
5021 type1
.t
|= (type
->t
& ~VT_TYPE
);
5026 decl_initializer(type
, sec
, c
, 0, size_only
);
5028 /* XXX: make it more general */
5029 if (!size_only
&& nb_elems
> 1) {
5030 unsigned long c_end
;
5035 tcc_error("range init not supported yet for dynamic storage");
5036 c_end
= c
+ nb_elems
* elem_size
;
5037 if (c_end
> sec
->data_allocated
)
5038 section_realloc(sec
, c_end
);
5039 src
= sec
->data
+ c
;
5041 for(i
= 1; i
< nb_elems
; i
++) {
5043 memcpy(dst
, src
, elem_size
);
5049 #define EXPR_CONST 1
5052 /* store a value or an expression directly in global data or in local array */
5053 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5054 int v
, int expr_type
)
5056 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5058 unsigned long long bit_mask
;
5066 /* compound literals must be allocated globally in this case */
5067 saved_global_expr
= global_expr
;
5070 global_expr
= saved_global_expr
;
5071 /* NOTE: symbols are accepted */
5072 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5073 tcc_error("initializer element is not constant");
5081 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5084 /* XXX: not portable */
5085 /* XXX: generate error if incorrect relocation */
5086 gen_assign_cast(&dtype
);
5087 bt
= type
->t
& VT_BTYPE
;
5088 /* we'll write at most 12 bytes */
5089 if (c
+ 12 > sec
->data_allocated
) {
5090 section_realloc(sec
, c
+ 12);
5092 ptr
= sec
->data
+ c
;
5093 /* XXX: make code faster ? */
5094 if (!(type
->t
& VT_BITFIELD
)) {
5099 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5100 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5101 bit_mask
= (1LL << bit_size
) - 1;
5103 if ((vtop
->r
& VT_SYM
) &&
5109 (bt
== VT_INT
&& bit_size
!= 32)))
5110 tcc_error("initializer element is not computable at load time");
5113 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5115 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5118 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5121 *(double *)ptr
= vtop
->c
.d
;
5124 *(long double *)ptr
= vtop
->c
.ld
;
5127 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
5130 if (s1
->vtop
->r
& VT_SYM
) {
5131 greloc(s1
, sec
, s1
->vtop
->sym
, c
, R_DATA_PTR
);
5133 *(addr_t
*)ptr
|= (s1
->vtop
->c
.ull
& bit_mask
) << bit_pos
;
5136 if (vtop
->r
& VT_SYM
) {
5137 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5139 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5144 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5151 /* put zeros for variable based init */
5152 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5155 /* nothing to do because globals are already set to zero */
5157 vpush_global_sym(&func_old_type
, TOK_memset
);
5165 /* 't' contains the type and storage info. 'c' is the offset of the
5166 object in section 'sec'. If 'sec' is NULL, it means stack based
5167 allocation. 'first' is true if array '{' must be read (multi
5168 dimension implicit array init handling). 'size_only' is true if
5169 size only evaluation is wanted (only for arrays). */
5170 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5171 int first
, int size_only
)
5173 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5174 int size1
, align1
, expr_type
;
5178 if (type
->t
& VT_VLA
) {
5181 /* save current stack pointer */
5182 if (vla_flags
& VLA_NEED_NEW_FRAME
) {
5184 vla_flags
= VLA_IN_SCOPE
;
5185 vla_sp_loc
= &vla_sp_loc_tmp
;
5188 vla_runtime_type_size(type
, &a
);
5189 gen_vla_alloc(type
, a
);
5190 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5194 } else if (type
->t
& VT_ARRAY
) {
5198 t1
= pointed_type(type
);
5199 size1
= type_size(t1
, &align1
);
5202 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5205 tcc_error("character array initializer must be a literal,"
5206 " optionally enclosed in braces");
5211 /* only parse strings here if correct type (otherwise: handle
5212 them as ((w)char *) expressions */
5213 if ((tok
== TOK_LSTR
&&
5214 #ifdef TCC_TARGET_PE
5215 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5217 (t1
->t
& VT_BTYPE
) == VT_INT
5219 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5220 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5225 /* compute maximum number of chars wanted */
5227 cstr_len
= cstr
->size
;
5229 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5232 if (n
>= 0 && nb
> (n
- array_length
))
5233 nb
= n
- array_length
;
5236 tcc_warning("initializer-string for array is too long");
5237 /* in order to go faster for common case (char
5238 string in global variable, we handle it
5240 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5241 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5245 ch
= ((unsigned char *)cstr
->data
)[i
];
5247 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5248 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5256 /* only add trailing zero if enough storage (no
5257 warning in this case since it is standard) */
5258 if (n
< 0 || array_length
< n
) {
5260 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5266 while (tok
!= '}') {
5267 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5268 if (n
>= 0 && index
>= n
)
5269 tcc_error("index too large");
5270 /* must put zero in holes (note that doing it that way
5271 ensures that it even works with designators) */
5272 if (!size_only
&& array_length
< index
) {
5273 init_putz(t1
, sec
, c
+ array_length
* size1
,
5274 (index
- array_length
) * size1
);
5277 if (index
> array_length
)
5278 array_length
= index
;
5279 /* special test for multi dimensional arrays (may not
5280 be strictly correct if designators are used at the
5282 if (index
>= n
&& no_oblock
)
5291 /* put zeros at the end */
5292 if (!size_only
&& n
>= 0 && array_length
< n
) {
5293 init_putz(t1
, sec
, c
+ array_length
* size1
,
5294 (n
- array_length
) * size1
);
5296 /* patch type size if needed */
5298 s
->c
= array_length
;
5299 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5300 (sec
|| !first
|| tok
== '{')) {
5303 /* NOTE: the previous test is a specific case for automatic
5304 struct/union init */
5305 /* XXX: union needs only one init */
5307 /* XXX: this test is incorrect for local initializers
5308 beginning with ( without {. It would be much more difficult
5309 to do it correctly (ideally, the expression parser should
5310 be used in all cases) */
5316 while (tok
== '(') {
5320 if (!parse_btype(&type1
, &ad1
))
5322 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5324 if (!is_assignable_types(type
, &type1
))
5325 tcc_error("invalid type for cast");
5330 if (first
|| tok
== '{') {
5339 while (tok
!= '}') {
5340 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5342 if (!size_only
&& array_length
< index
) {
5343 init_putz(type
, sec
, c
+ array_length
,
5344 index
- array_length
);
5346 index
= index
+ type_size(&f
->type
, &align1
);
5347 if (index
> array_length
)
5348 array_length
= index
;
5350 /* gr: skip fields from same union - ugly. */
5352 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5353 /* test for same offset */
5354 if (f
->next
->c
!= f
->c
)
5356 /* if yes, test for bitfield shift */
5357 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5358 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5359 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5360 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5361 if (bit_pos_1
!= bit_pos_2
)
5368 if (no_oblock
&& f
== NULL
)
5374 /* put zeros at the end */
5375 if (!size_only
&& array_length
< n
) {
5376 init_putz(type
, sec
, c
+ array_length
,
5385 } else if (tok
== '{') {
5387 decl_initializer(type
, sec
, c
, first
, size_only
);
5389 } else if (size_only
) {
5390 /* just skip expression */
5391 parlevel
= parlevel1
= 0;
5392 while ((parlevel
> 0 || parlevel1
> 0 ||
5393 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5396 else if (tok
== ')')
5398 else if (tok
== '{')
5400 else if (tok
== '}')
5405 /* currently, we always use constant expression for globals
5406 (may change for scripting case) */
5407 expr_type
= EXPR_CONST
;
5409 expr_type
= EXPR_ANY
;
5410 init_putv(type
, sec
, c
, 0, expr_type
);
5414 /* parse an initializer for type 't' if 'has_init' is non zero, and
5415 allocate space in local or global data space ('r' is either
5416 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5417 variable 'v' with an associated name represented by 'asm_label' of
5418 scope 'scope' is declared before initializers are parsed. If 'v' is
5419 zero, then a reference to the new object is put in the value stack.
5420 If 'has_init' is 2, a special parsing is done to handle string
5422 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5423 int has_init
, int v
, char *asm_label
,
5426 int size
, align
, addr
, data_offset
;
5428 ParseState saved_parse_state
= {0};
5429 TokenString init_str
;
5431 Sym
*flexible_array
;
5433 flexible_array
= NULL
;
5434 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5435 Sym
*field
= type
->ref
->next
;
5438 field
= field
->next
;
5439 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5440 flexible_array
= field
;
5444 size
= type_size(type
, &align
);
5445 /* If unknown size, we must evaluate it before
5446 evaluating initializers because
5447 initializers can generate global data too
5448 (e.g. string pointers or ISOC99 compound
5449 literals). It also simplifies local
5450 initializers handling */
5451 tok_str_new(&init_str
);
5452 if (size
< 0 || (flexible_array
&& has_init
)) {
5454 tcc_error("unknown type size");
5455 /* get all init string */
5456 if (has_init
== 2) {
5457 /* only get strings */
5458 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5459 tok_str_add_tok(&init_str
);
5464 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5466 tcc_error("unexpected end of file in initializer");
5467 tok_str_add_tok(&init_str
);
5470 else if (tok
== '}') {
5480 tok_str_add(&init_str
, -1);
5481 tok_str_add(&init_str
, 0);
5484 save_parse_state(&saved_parse_state
);
5486 macro_ptr
= init_str
.str
;
5488 decl_initializer(type
, NULL
, 0, 1, 1);
5489 /* prepare second initializer parsing */
5490 macro_ptr
= init_str
.str
;
5493 /* if still unknown size, error */
5494 size
= type_size(type
, &align
);
5496 tcc_error("unknown type size");
5499 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5500 /* take into account specified alignment if bigger */
5501 if (ad
->a
.aligned
) {
5502 if (ad
->a
.aligned
> align
)
5503 align
= ad
->a
.aligned
;
5504 } else if (ad
->a
.packed
) {
5507 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5509 #ifdef CONFIG_TCC_BCHECK
5510 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5514 loc
= (loc
- size
) & -align
;
5516 #ifdef CONFIG_TCC_BCHECK
5517 /* handles bounds */
5518 /* XXX: currently, since we do only one pass, we cannot track
5519 '&' operators, so we add only arrays */
5520 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5521 unsigned long *bounds_ptr
;
5522 /* add padding between regions */
5524 /* then add local bound info */
5525 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5526 bounds_ptr
[0] = addr
;
5527 bounds_ptr
[1] = size
;
5531 /* local variable */
5532 sym_push(v
, type
, r
, addr
);
5534 /* push local reference */
5535 vset(type
, r
, addr
);
5541 if (v
&& scope
== VT_CONST
) {
5542 /* see if the symbol was already defined */
5545 if (!is_compatible_types(&sym
->type
, type
))
5546 tcc_error("incompatible types for redefinition of '%s'",
5547 get_tok_str(v
, NULL
));
5548 if (sym
->type
.t
& VT_EXTERN
) {
5549 /* if the variable is extern, it was not allocated */
5550 sym
->type
.t
&= ~VT_EXTERN
;
5551 /* set array size if it was ommited in extern
5553 if ((sym
->type
.t
& VT_ARRAY
) &&
5554 sym
->type
.ref
->c
< 0 &&
5556 sym
->type
.ref
->c
= type
->ref
->c
;
5558 /* we accept several definitions of the same
5559 global variable. this is tricky, because we
5560 must play with the SHN_COMMON type of the symbol */
5561 /* XXX: should check if the variable was already
5562 initialized. It is incorrect to initialized it
5564 /* no init data, we won't add more to the symbol */
5571 /* allocate symbol in corresponding section */
5576 else if (tcc_state
->nocommon
)
5580 data_offset
= sec
->data_offset
;
5581 data_offset
= (data_offset
+ align
- 1) & -align
;
5583 /* very important to increment global pointer at this time
5584 because initializers themselves can create new initializers */
5585 data_offset
+= size
;
5586 #ifdef CONFIG_TCC_BCHECK
5587 /* add padding if bound check */
5588 if (tcc_state
->do_bounds_check
)
5591 sec
->data_offset
= data_offset
;
5592 /* allocate section space to put the data */
5593 if (sec
->sh_type
!= SHT_NOBITS
&&
5594 data_offset
> sec
->data_allocated
)
5595 section_realloc(sec
, data_offset
);
5596 /* align section if needed */
5597 if (align
> sec
->sh_addralign
)
5598 sec
->sh_addralign
= align
;
5600 addr
= 0; /* avoid warning */
5604 if (scope
!= VT_CONST
|| !sym
) {
5605 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5606 sym
->asm_label
= asm_label
;
5608 /* update symbol definition */
5610 put_extern_sym(sym
, sec
, addr
, size
);
5613 /* put a common area */
5614 put_extern_sym(sym
, NULL
, align
, size
);
5615 /* XXX: find a nicer way */
5616 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5617 esym
->st_shndx
= SHN_COMMON
;
5622 /* push global reference */
5623 sym
= get_sym_ref(type
, sec
, addr
, size
);
5625 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5628 /* patch symbol weakness */
5629 if (type
->t
& VT_WEAK
)
5631 #ifdef CONFIG_TCC_BCHECK
5632 /* handles bounds now because the symbol must be defined
5633 before for the relocation */
5634 if (tcc_state
->do_bounds_check
) {
5635 unsigned long *bounds_ptr
;
5637 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5638 /* then add global bound info */
5639 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5640 bounds_ptr
[0] = 0; /* relocated */
5641 bounds_ptr
[1] = size
;
5645 if (has_init
|| (type
->t
& VT_VLA
)) {
5646 decl_initializer(type
, sec
, addr
, 1, 0);
5647 /* restore parse state if needed */
5649 tok_str_free(init_str
.str
);
5650 restore_parse_state(&saved_parse_state
);
5652 /* patch flexible array member size back to -1, */
5653 /* for possible subsequent similar declarations */
5655 flexible_array
->type
.ref
->c
= -1;
5660 static void put_func_debug(Sym
*sym
)
5665 /* XXX: we put here a dummy type */
5666 snprintf(buf
, sizeof(buf
), "%s:%c1",
5667 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5668 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5669 cur_text_section
, sym
->c
);
5670 /* //gr gdb wants a line at the function */
5671 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5676 /* parse an old style function declaration list */
5677 /* XXX: check multiple parameter */
5678 static void func_decl_list(Sym
*func_sym
)
5685 /* parse each declaration */
5686 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5687 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5688 if (!parse_btype(&btype
, &ad
))
5689 expect("declaration list");
5690 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5691 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5693 /* we accept no variable after */
5697 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5698 /* find parameter in function parameter list */
5701 if ((s
->v
& ~SYM_FIELD
) == v
)
5705 tcc_error("declaration for parameter '%s' but no such parameter",
5706 get_tok_str(v
, NULL
));
5708 /* check that no storage specifier except 'register' was given */
5709 if (type
.t
& VT_STORAGE
)
5710 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5711 convert_parameter_type(&type
);
5712 /* we can add the type (NOTE: it could be local to the function) */
5714 /* accept other parameters */
5725 /* parse a function defined by symbol 'sym' and generate its code in
5726 'cur_text_section' */
5727 static void gen_function(Sym
*sym
)
5729 int saved_nocode_wanted
= nocode_wanted
;
5731 ind
= cur_text_section
->data_offset
;
5732 /* NOTE: we patch the symbol size later */
5733 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5734 funcname
= get_tok_str(sym
->v
, NULL
);
5736 /* Initialize VLA state */
5737 vla_sp_loc
= &vla_sp_root_loc
;
5738 vla_flags
= VLA_NEED_NEW_FRAME
;
5739 /* put debug symbol */
5740 if (tcc_state
->do_debug
)
5741 put_func_debug(sym
);
5742 /* push a dummy symbol to enable local sym storage */
5743 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5744 gfunc_prolog(&sym
->type
);
5746 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5749 cur_text_section
->data_offset
= ind
;
5750 label_pop(&global_label_stack
, NULL
);
5751 /* reset local stack */
5752 scope_stack_bottom
= NULL
;
5753 sym_pop(&local_stack
, NULL
);
5754 /* end of function */
5755 /* patch symbol size */
5756 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5758 /* patch symbol weakness (this definition overrules any prototype) */
5759 if (sym
->type
.t
& VT_WEAK
)
5761 if (tcc_state
->do_debug
) {
5762 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5764 /* It's better to crash than to generate wrong code */
5765 cur_text_section
= NULL
;
5766 funcname
= ""; /* for safety */
5767 func_vt
.t
= VT_VOID
; /* for safety */
5768 func_var
= 0; /* for safety */
5769 ind
= 0; /* for safety */
5770 nocode_wanted
= saved_nocode_wanted
;
5773 ST_FUNC
void gen_inline_functions(void)
5776 int *str
, inline_generated
, i
;
5777 struct InlineFunc
*fn
;
5779 /* iterate while inline function are referenced */
5781 inline_generated
= 0;
5782 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5783 fn
= tcc_state
->inline_fns
[i
];
5785 if (sym
&& sym
->c
) {
5786 /* the function was used: generate its code and
5787 convert it to a normal function */
5788 str
= fn
->token_str
;
5791 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5792 sym
->r
= VT_SYM
| VT_CONST
;
5793 sym
->type
.t
&= ~VT_INLINE
;
5797 cur_text_section
= text_section
;
5799 macro_ptr
= NULL
; /* fail safe */
5801 inline_generated
= 1;
5804 if (!inline_generated
)
5807 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5808 fn
= tcc_state
->inline_fns
[i
];
5809 str
= fn
->token_str
;
5812 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5815 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5816 static int decl0(int l
, int is_for_loop_init
)
5824 if (!parse_btype(&btype
, &ad
)) {
5825 if (is_for_loop_init
)
5827 /* skip redundant ';' */
5828 /* XXX: find more elegant solution */
5833 if (l
== VT_CONST
&&
5834 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5835 /* global asm block */
5839 /* special test for old K&R protos without explicit int
5840 type. Only accepted when defining global data */
5841 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5845 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5846 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5848 /* we accept no variable after */
5852 while (1) { /* iterate thru each declaration */
5853 char *asm_label
; // associated asm label
5855 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5859 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5860 printf("type = '%s'\n", buf
);
5863 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5864 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5865 tcc_error("function without file scope cannot be static");
5867 /* if old style function prototype, we accept a
5870 if (sym
->c
== FUNC_OLD
)
5871 func_decl_list(sym
);
5875 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5878 asm_label_instr(&astr
);
5879 asm_label
= tcc_strdup(astr
.data
);
5882 /* parse one last attribute list, after asm label */
5883 parse_attribute(&ad
);
5888 #ifdef TCC_TARGET_PE
5889 if (ad
.a
.func_import
)
5890 type
.t
|= VT_IMPORT
;
5891 if (ad
.a
.func_export
)
5892 type
.t
|= VT_EXPORT
;
5896 tcc_error("cannot use local functions");
5897 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5898 expect("function definition");
5900 /* reject abstract declarators in function definition */
5902 while ((sym
= sym
->next
) != NULL
)
5903 if (!(sym
->v
& ~SYM_FIELD
))
5904 expect("identifier");
5906 /* XXX: cannot do better now: convert extern line to static inline */
5907 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5908 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5913 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5916 ref
= sym
->type
.ref
;
5917 if (0 == ref
->a
.func_proto
)
5918 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
5920 /* use func_call from prototype if not defined */
5921 if (ref
->a
.func_call
!= FUNC_CDECL
5922 && type
.ref
->a
.func_call
== FUNC_CDECL
)
5923 type
.ref
->a
.func_call
= ref
->a
.func_call
;
5925 /* use export from prototype */
5926 if (ref
->a
.func_export
)
5927 type
.ref
->a
.func_export
= 1;
5929 /* use static from prototype */
5930 if (sym
->type
.t
& VT_STATIC
)
5931 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5933 if (!is_compatible_types(&sym
->type
, &type
)) {
5935 tcc_error("incompatible types for redefinition of '%s'",
5936 get_tok_str(v
, NULL
));
5938 type
.ref
->a
.func_proto
= 0;
5939 /* if symbol is already defined, then put complete type */
5942 /* put function symbol */
5943 sym
= global_identifier_push(v
, type
.t
, 0);
5944 sym
->type
.ref
= type
.ref
;
5947 /* static inline functions are just recorded as a kind
5948 of macro. Their code will be emitted at the end of
5949 the compilation unit only if they are used */
5950 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5951 (VT_INLINE
| VT_STATIC
)) {
5952 TokenString func_str
;
5954 struct InlineFunc
*fn
;
5955 const char *filename
;
5957 tok_str_new(&func_str
);
5963 tcc_error("unexpected end of file");
5964 tok_str_add_tok(&func_str
);
5969 } else if (t
== '}') {
5971 if (block_level
== 0)
5975 tok_str_add(&func_str
, -1);
5976 tok_str_add(&func_str
, 0);
5977 filename
= file
? file
->filename
: "";
5978 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5979 strcpy(fn
->filename
, filename
);
5981 fn
->token_str
= func_str
.str
;
5982 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5985 /* compute text section */
5986 cur_text_section
= ad
.section
;
5987 if (!cur_text_section
)
5988 cur_text_section
= text_section
;
5989 sym
->r
= VT_SYM
| VT_CONST
;
5994 if (btype
.t
& VT_TYPEDEF
) {
5995 /* save typedefed type */
5996 /* XXX: test storage specifiers ? */
5997 sym
= sym_push(v
, &type
, 0, 0);
5999 sym
->type
.t
|= VT_TYPEDEF
;
6002 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6003 /* external function definition */
6004 /* specific case for func_call attribute */
6005 ad
.a
.func_proto
= 1;
6007 } else if (!(type
.t
& VT_ARRAY
)) {
6008 /* not lvalue if array */
6009 r
|= lvalue_type(type
.t
);
6011 has_init
= (tok
== '=');
6012 if (has_init
&& (type
.t
& VT_VLA
))
6013 tcc_error("Variable length array cannot be initialized");
6014 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6015 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6016 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6017 /* external variable or function */
6018 /* NOTE: as GCC, uninitialized global static
6019 arrays of null size are considered as
6021 sym
= external_sym(v
, &type
, r
, asm_label
);
6023 if (type
.t
& VT_WEAK
)
6026 if (ad
.alias_target
) {
6031 alias_target
= sym_find(ad
.alias_target
);
6032 if (!alias_target
|| !alias_target
->c
)
6033 tcc_error("unsupported forward __alias__ attribute");
6034 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6035 tsec
.sh_num
= esym
->st_shndx
;
6036 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6039 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6040 if (type
.t
& VT_STATIC
)
6046 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
6050 if (is_for_loop_init
)
6063 ST_FUNC
void decl(int l
)