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
);
93 ST_FUNC
void vpush64(int ty
, unsigned long long v
);
94 ST_FUNC
void vpush(CType
*type
);
95 ST_FUNC
int gvtst(int inv
, int t
);
96 ST_FUNC
int is_btype_size(int bt
);
98 ST_INLN
int is_float(int t
)
102 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
|| bt
== VT_QFLOAT
;
105 /* we use our own 'finite' function to avoid potential problems with
106 non standard math libs */
107 /* XXX: endianness dependent */
108 ST_FUNC
int ieee_finite(double d
)
111 memcpy(p
, &d
, sizeof(double));
112 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
115 ST_FUNC
void test_lvalue(void)
117 if (!(vtop
->r
& VT_LVAL
))
121 /* ------------------------------------------------------------------------- */
122 /* symbol allocator */
123 static Sym
*__sym_malloc(void)
125 Sym
*sym_pool
, *sym
, *last_sym
;
128 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
129 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
131 last_sym
= sym_free_first
;
133 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
134 sym
->next
= last_sym
;
138 sym_free_first
= last_sym
;
142 static inline Sym
*sym_malloc(void)
145 sym
= sym_free_first
;
147 sym
= __sym_malloc();
148 sym_free_first
= sym
->next
;
152 ST_INLN
void sym_free(Sym
*sym
)
154 sym
->next
= sym_free_first
;
155 tcc_free(sym
->asm_label
);
156 sym_free_first
= sym
;
159 /* push, without hashing */
160 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
163 if (ps
== &local_stack
) {
164 for (s
= *ps
; s
&& s
!= scope_stack_bottom
; s
= s
->prev
)
165 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
&& s
->v
== v
)
166 tcc_error("incompatible types for redefinition of '%s'",
167 get_tok_str(v
, NULL
));
185 /* find a symbol and return its associated structure. 's' is the top
186 of the symbol stack */
187 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
199 /* structure lookup */
200 ST_INLN Sym
*struct_find(int v
)
203 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
205 return table_ident
[v
]->sym_struct
;
208 /* find an identifier */
209 ST_INLN Sym
*sym_find(int v
)
212 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
214 return table_ident
[v
]->sym_identifier
;
217 /* push a given symbol on the symbol stack */
218 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
227 s
= sym_push2(ps
, v
, type
->t
, c
);
228 s
->type
.ref
= type
->ref
;
230 /* don't record fields or anonymous symbols */
232 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
233 /* record symbol in token array */
234 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
236 ps
= &ts
->sym_struct
;
238 ps
= &ts
->sym_identifier
;
245 /* push a global identifier */
246 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
249 s
= sym_push2(&global_stack
, v
, t
, c
);
250 /* don't record anonymous symbol */
251 if (v
< SYM_FIRST_ANOM
) {
252 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
253 /* modify the top most local identifier, so that
254 sym_identifier will point to 's' when popped */
256 ps
= &(*ps
)->prev_tok
;
263 /* pop symbols until top reaches 'b' */
264 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
274 /* remove symbol in token array */
276 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
277 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
279 ps
= &ts
->sym_struct
;
281 ps
= &ts
->sym_identifier
;
290 static void weaken_symbol(Sym
*sym
)
292 sym
->type
.t
|= VT_WEAK
;
297 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
298 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
299 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
303 static void apply_visibility(Sym
*sym
, CType
*type
)
305 int vis
= sym
->type
.t
& VT_VIS_MASK
;
306 int vis2
= type
->t
& VT_VIS_MASK
;
307 if (vis
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
309 else if (vis2
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
312 vis
= (vis
< vis2
) ? vis
: vis2
;
313 sym
->type
.t
&= ~VT_VIS_MASK
;
319 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
320 vis
>>= VT_VIS_SHIFT
;
321 esym
->st_other
= (esym
->st_other
& ~ELFW(ST_VISIBILITY
)(-1)) | vis
;
325 /* ------------------------------------------------------------------------- */
327 ST_FUNC
void swap(int *p
, int *q
)
335 static void vsetc(CType
*type
, int r
, CValue
*vc
)
339 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
340 tcc_error("memory full (vstack)");
341 /* cannot let cpu flags if other instruction are generated. Also
342 avoid leaving VT_JMP anywhere except on the top of the stack
343 because it would complicate the code generator. */
344 if (vtop
>= vstack
) {
345 v
= vtop
->r
& VT_VALMASK
;
346 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
356 /* push constant of type "type" with useless value */
357 ST_FUNC
void vpush(CType
*type
)
360 vsetc(type
, VT_CONST
, &cval
);
363 /* push integer constant */
364 ST_FUNC
void vpushi(int v
)
368 vsetc(&int_type
, VT_CONST
, &cval
);
371 /* push a pointer sized constant */
372 static void vpushs(addr_t v
)
376 vsetc(&size_type
, VT_CONST
, &cval
);
379 /* push arbitrary 64bit constant */
380 ST_FUNC
void vpush64(int ty
, unsigned long long v
)
387 vsetc(&ctype
, VT_CONST
, &cval
);
390 /* push long long constant */
391 static inline void vpushll(long long v
)
393 vpush64(VT_LLONG
, v
);
396 /* push a symbol value of TYPE */
397 static inline void vpushsym(CType
*type
, Sym
*sym
)
401 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
405 /* Return a static symbol pointing to a section */
406 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
412 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
413 sym
->type
.ref
= type
->ref
;
414 sym
->r
= VT_CONST
| VT_SYM
;
415 put_extern_sym(sym
, sec
, offset
, size
);
419 /* push a reference to a section offset by adding a dummy symbol */
420 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
422 vpushsym(type
, get_sym_ref(type
, sec
, offset
, size
));
425 /* define a new external reference to a symbol 'v' of type 'u' */
426 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
432 /* push forward reference */
433 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
434 s
->type
.ref
= type
->ref
;
435 s
->r
= r
| VT_CONST
| VT_SYM
;
440 /* define a new external reference to a symbol 'v' with alternate asm
441 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
442 is no alternate name (most cases) */
443 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
449 /* push forward reference */
450 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
451 s
->asm_label
= asm_label
;
452 s
->type
.t
|= VT_EXTERN
;
453 } else if (s
->type
.ref
== func_old_type
.ref
) {
454 s
->type
.ref
= type
->ref
;
455 s
->r
= r
| VT_CONST
| VT_SYM
;
456 s
->type
.t
|= VT_EXTERN
;
457 } else if (!is_compatible_types(&s
->type
, type
)) {
458 tcc_error("incompatible types for redefinition of '%s'",
459 get_tok_str(v
, NULL
));
461 /* Merge some storage attributes. */
462 if (type
->t
& VT_WEAK
)
465 if (type
->t
& VT_VIS_MASK
)
466 apply_visibility(s
, type
);
471 /* push a reference to global symbol v */
472 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
474 vpushsym(type
, external_global_sym(v
, type
, 0));
477 ST_FUNC
void vset(CType
*type
, int r
, int v
)
482 vsetc(type
, r
, &cval
);
485 static void vseti(int r
, int v
)
493 ST_FUNC
void vswap(void)
496 /* cannot let cpu flags if other instruction are generated. Also
497 avoid leaving VT_JMP anywhere except on the top of the stack
498 because it would complicate the code generator. */
499 if (vtop
>= vstack
) {
500 int v
= vtop
->r
& VT_VALMASK
;
501 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
508 /* XXX: +2% overall speed possible with optimized memswap
510 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
514 ST_FUNC
void vpushv(SValue
*v
)
516 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
517 tcc_error("memory full (vstack)");
522 static void vdup(void)
527 /* save r to the memory stack, and mark it as being free */
528 ST_FUNC
void save_reg(int r
)
530 int l
, saved
, size
, align
;
534 /* modify all stack values */
537 for(p
=vstack
;p
<=vtop
;p
++) {
538 if ((p
->r
& VT_VALMASK
) == r
||
539 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
540 /* must save value on stack if not already done */
542 /* NOTE: must reload 'r' because r might be equal to r2 */
543 r
= p
->r
& VT_VALMASK
;
544 /* store register in the stack */
546 if ((p
->r
& VT_LVAL
) ||
547 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
548 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
549 type
= &char_pointer_type
;
553 size
= type_size(type
, &align
);
554 loc
= (loc
- size
) & -align
;
556 sv
.r
= VT_LOCAL
| VT_LVAL
;
559 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
560 /* x86 specific: need to pop fp register ST0 if saved */
562 o(0xd8dd); /* fstp %st(0) */
565 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
566 /* special long long case */
567 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
575 /* mark that stack entry as being saved on the stack */
576 if (p
->r
& VT_LVAL
) {
577 /* also clear the bounded flag because the
578 relocation address of the function was stored in
580 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
582 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
590 #ifdef TCC_TARGET_ARM
591 /* find a register of class 'rc2' with at most one reference on stack.
592 * If none, call get_reg(rc) */
593 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
598 for(r
=0;r
<NB_REGS
;r
++) {
599 if (reg_classes
[r
] & rc2
) {
602 for(p
= vstack
; p
<= vtop
; p
++) {
603 if ((p
->r
& VT_VALMASK
) == r
||
604 (p
->r2
& VT_VALMASK
) == r
)
615 /* find a free register of class 'rc'. If none, save one register */
616 ST_FUNC
int get_reg(int rc
)
621 /* find a free register */
622 for(r
=0;r
<NB_REGS
;r
++) {
623 if (reg_classes
[r
] & rc
) {
624 for(p
=vstack
;p
<=vtop
;p
++) {
625 if ((p
->r
& VT_VALMASK
) == r
||
626 (p
->r2
& VT_VALMASK
) == r
)
634 /* no register left : free the first one on the stack (VERY
635 IMPORTANT to start from the bottom to ensure that we don't
636 spill registers used in gen_opi()) */
637 for(p
=vstack
;p
<=vtop
;p
++) {
638 /* look at second register (if long long) */
639 r
= p
->r2
& VT_VALMASK
;
640 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
642 r
= p
->r
& VT_VALMASK
;
643 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
649 /* Should never comes here */
653 /* save registers up to (vtop - n) stack entry */
654 ST_FUNC
void save_regs(int n
)
659 for(p
= vstack
;p
<= p1
; p
++) {
660 r
= p
->r
& VT_VALMASK
;
667 /* move register 's' (of type 't') to 'r', and flush previous value of r to memory
669 static void move_reg(int r
, int s
, int t
)
683 /* get address of vtop (vtop MUST BE an lvalue) */
684 ST_FUNC
void gaddrof(void)
686 if (vtop
->r
& VT_REF
)
689 /* tricky: if saved lvalue, then we can go back to lvalue */
690 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
691 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
696 #ifdef CONFIG_TCC_BCHECK
697 /* generate lvalue bound code */
698 static void gbound(void)
703 vtop
->r
&= ~VT_MUSTBOUND
;
704 /* if lvalue, then use checking code before dereferencing */
705 if (vtop
->r
& VT_LVAL
) {
706 /* if not VT_BOUNDED value, then make one */
707 if (!(vtop
->r
& VT_BOUNDED
)) {
708 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
709 /* must save type because we must set it to int to get pointer */
711 vtop
->type
.t
= VT_INT
;
714 gen_bounded_ptr_add();
715 vtop
->r
|= lval_type
;
718 /* then check for dereferencing */
719 gen_bounded_ptr_deref();
724 /* store vtop a register belonging to class 'rc'. lvalues are
725 converted to values. Cannot be used if cannot be converted to
726 register value (such as structures). */
727 ST_FUNC
int gv(int rc
)
729 int r
, bit_pos
, bit_size
, size
, align
, i
;
732 /* NOTE: get_reg can modify vstack[] */
733 if (vtop
->type
.t
& VT_BITFIELD
) {
736 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
737 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
738 /* remove bit field info to avoid loops */
739 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
740 /* cast to int to propagate signedness in following ops */
741 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
746 if((vtop
->type
.t
& VT_UNSIGNED
) ||
747 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
748 type
.t
|= VT_UNSIGNED
;
750 /* generate shifts */
751 vpushi(bits
- (bit_pos
+ bit_size
));
753 vpushi(bits
- bit_size
);
754 /* NOTE: transformed to SHR if unsigned */
758 if (is_float(vtop
->type
.t
) &&
759 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
762 unsigned long offset
;
763 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
767 /* XXX: unify with initializers handling ? */
768 /* CPUs usually cannot use float constants, so we store them
769 generically in data segment */
770 size
= type_size(&vtop
->type
, &align
);
771 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
772 data_section
->data_offset
= offset
;
773 /* XXX: not portable yet */
774 #if defined(__i386__) || defined(__x86_64__)
775 /* Zero pad x87 tenbyte long doubles */
776 if (size
== LDOUBLE_SIZE
) {
777 vtop
->c
.tab
[2] &= 0xffff;
778 #if LDOUBLE_SIZE == 16
783 ptr
= section_ptr_add(data_section
, size
);
785 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
789 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
793 ptr
[i
] = vtop
->c
.tab
[i
];
794 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
795 vtop
->r
|= VT_LVAL
| VT_SYM
;
797 vtop
->c
.ptr_offset
= 0;
799 #ifdef CONFIG_TCC_BCHECK
800 if (vtop
->r
& VT_MUSTBOUND
)
804 r
= vtop
->r
& VT_VALMASK
;
805 rc2
= (rc
& RC_FLOAT
) ? RC_FLOAT
: RC_INT
;
806 #ifndef TCC_TARGET_ARM64
809 #ifdef TCC_TARGET_X86_64
810 else if (rc
== RC_FRET
)
815 /* need to reload if:
817 - lvalue (need to dereference pointer)
818 - already a register, but not in the right class */
820 || (vtop
->r
& VT_LVAL
)
821 || !(reg_classes
[r
] & rc
)
822 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
823 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
824 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
&& !(reg_classes
[vtop
->r2
] & rc2
))
826 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
831 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
832 if (((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
)) {
833 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
835 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
836 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
837 unsigned long long ll
;
839 int r2
, original_type
;
840 original_type
= vtop
->type
.t
;
841 /* two register type load : expand to two words
843 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
844 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
847 vtop
->c
.ui
= ll
; /* first word */
849 vtop
->r
= r
; /* save register value */
850 vpushi(ll
>> 32); /* second word */
853 if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
854 (vtop
->r
& VT_LVAL
)) {
855 /* We do not want to modifier the long long
856 pointer here, so the safest (and less
857 efficient) is to save all the other registers
858 in the stack. XXX: totally inefficient. */
860 /* load from memory */
861 vtop
->type
.t
= load_type
;
864 vtop
[-1].r
= r
; /* save register value */
865 /* increment pointer to get second word */
866 vtop
->type
.t
= addr_type
;
871 vtop
->type
.t
= load_type
;
876 vtop
[-1].r
= r
; /* save register value */
877 vtop
->r
= vtop
[-1].r2
;
879 /* Allocate second register. Here we rely on the fact that
880 get_reg() tries first to free r2 of an SValue. */
884 /* write second register */
886 vtop
->type
.t
= original_type
;
887 } else if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
889 /* lvalue of scalar type : need to use lvalue type
890 because of possible cast */
893 /* compute memory access type */
894 if (vtop
->r
& VT_REF
)
895 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
900 else if (vtop
->r
& VT_LVAL_BYTE
)
902 else if (vtop
->r
& VT_LVAL_SHORT
)
904 if (vtop
->r
& VT_LVAL_UNSIGNED
)
908 /* restore wanted type */
911 /* one register type load */
916 #ifdef TCC_TARGET_C67
917 /* uses register pairs for doubles */
918 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
925 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
926 ST_FUNC
void gv2(int rc1
, int rc2
)
930 /* generate more generic register first. But VT_JMP or VT_CMP
931 values must be generated first in all cases to avoid possible
933 v
= vtop
[0].r
& VT_VALMASK
;
934 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
939 /* test if reload is needed for first register */
940 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
950 /* test if reload is needed for first register */
951 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
957 #ifndef TCC_TARGET_ARM64
958 /* wrapper around RC_FRET to return a register by type */
959 static int rc_fret(int t
)
961 #ifdef TCC_TARGET_X86_64
962 if (t
== VT_LDOUBLE
) {
970 /* wrapper around REG_FRET to return a register by type */
971 static int reg_fret(int t
)
973 #ifdef TCC_TARGET_X86_64
974 if (t
== VT_LDOUBLE
) {
981 /* expand long long on stack in two int registers */
982 static void lexpand(void)
986 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
989 vtop
[0].r
= vtop
[-1].r2
;
990 vtop
[0].r2
= VT_CONST
;
991 vtop
[-1].r2
= VT_CONST
;
992 vtop
[0].type
.t
= VT_INT
| u
;
993 vtop
[-1].type
.t
= VT_INT
| u
;
996 #ifdef TCC_TARGET_ARM
997 /* expand long long on stack */
998 ST_FUNC
void lexpand_nr(void)
1002 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1004 vtop
->r2
= VT_CONST
;
1005 vtop
->type
.t
= VT_INT
| u
;
1006 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
1007 if (v
== VT_CONST
) {
1008 vtop
[-1].c
.ui
= vtop
->c
.ull
;
1009 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
1011 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1013 vtop
->r
= vtop
[-1].r
;
1014 } else if (v
> VT_CONST
) {
1018 vtop
->r
= vtop
[-1].r2
;
1019 vtop
[-1].r2
= VT_CONST
;
1020 vtop
[-1].type
.t
= VT_INT
| u
;
1024 /* build a long long from two ints */
1025 static void lbuild(int t
)
1027 gv2(RC_INT
, RC_INT
);
1028 vtop
[-1].r2
= vtop
[0].r
;
1029 vtop
[-1].type
.t
= t
;
1033 /* rotate n first stack elements to the bottom
1034 I1 ... In -> I2 ... In I1 [top is right]
1036 ST_FUNC
void vrotb(int n
)
1042 for(i
=-n
+1;i
!=0;i
++)
1043 vtop
[i
] = vtop
[i
+1];
1047 /* rotate the n elements before entry e towards the top
1048 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1050 ST_FUNC
void vrote(SValue
*e
, int n
)
1056 for(i
= 0;i
< n
- 1; i
++)
1061 /* rotate n first stack elements to the top
1062 I1 ... In -> In I1 ... I(n-1) [top is right]
1064 ST_FUNC
void vrott(int n
)
1069 /* pop stack value */
1070 ST_FUNC
void vpop(void)
1073 v
= vtop
->r
& VT_VALMASK
;
1074 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1075 /* for x86, we need to pop the FP stack */
1076 if (v
== TREG_ST0
&& !nocode_wanted
) {
1077 o(0xd8dd); /* fstp %st(0) */
1080 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1081 /* need to put correct jump if && or || without test */
1087 /* convert stack entry to register and duplicate its value in another
1089 static void gv_dup(void)
1095 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1102 /* stack: H L L1 H1 */
1110 /* duplicate value */
1115 #ifdef TCC_TARGET_X86_64
1116 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1126 load(r1
, &sv
); /* move r to r1 */
1128 /* duplicates value */
1134 /* Generate value test
1136 * Generate a test for any value (jump, comparison and integers) */
1137 ST_FUNC
int gvtst(int inv
, int t
)
1139 int v
= vtop
->r
& VT_VALMASK
;
1140 if (v
!= VT_CMP
&& v
!= VT_JMP
&& v
!= VT_JMPI
) {
1144 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1145 /* constant jmp optimization */
1146 if ((vtop
->c
.i
!= 0) != inv
)
1151 return gtst(inv
, t
);
1154 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
1155 /* generate CPU independent (unsigned) long long operations */
1156 static void gen_opl(int op
)
1158 int t
, a
, b
, op1
, c
, i
;
1160 unsigned short reg_iret
= REG_IRET
;
1161 unsigned short reg_lret
= REG_LRET
;
1167 func
= TOK___divdi3
;
1170 func
= TOK___udivdi3
;
1173 func
= TOK___moddi3
;
1176 func
= TOK___umoddi3
;
1183 /* call generic long long function */
1184 vpush_global_sym(&func_old_type
, func
);
1189 vtop
->r2
= reg_lret
;
1202 /* stack: L1 H1 L2 H2 */
1207 vtop
[-2] = vtop
[-3];
1210 /* stack: H1 H2 L1 L2 */
1216 /* stack: H1 H2 L1 L2 ML MH */
1219 /* stack: ML MH H1 H2 L1 L2 */
1223 /* stack: ML MH H1 L2 H2 L1 */
1228 /* stack: ML MH M1 M2 */
1231 } else if (op
== '+' || op
== '-') {
1232 /* XXX: add non carry method too (for MIPS or alpha) */
1238 /* stack: H1 H2 (L1 op L2) */
1241 gen_op(op1
+ 1); /* TOK_xxxC2 */
1244 /* stack: H1 H2 (L1 op L2) */
1247 /* stack: (L1 op L2) H1 H2 */
1249 /* stack: (L1 op L2) (H1 op H2) */
1257 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1258 t
= vtop
[-1].type
.t
;
1262 /* stack: L H shift */
1264 /* constant: simpler */
1265 /* NOTE: all comments are for SHL. the other cases are
1266 done by swaping words */
1277 if (op
!= TOK_SAR
) {
1310 /* XXX: should provide a faster fallback on x86 ? */
1313 func
= TOK___ashrdi3
;
1316 func
= TOK___lshrdi3
;
1319 func
= TOK___ashldi3
;
1325 /* compare operations */
1331 /* stack: L1 H1 L2 H2 */
1333 vtop
[-1] = vtop
[-2];
1335 /* stack: L1 L2 H1 H2 */
1338 /* when values are equal, we need to compare low words. since
1339 the jump is inverted, we invert the test too. */
1342 else if (op1
== TOK_GT
)
1344 else if (op1
== TOK_ULT
)
1346 else if (op1
== TOK_UGT
)
1351 if (op1
!= TOK_NE
) {
1355 /* generate non equal test */
1356 /* XXX: NOT PORTABLE yet */
1360 #if defined(TCC_TARGET_I386)
1361 b
= psym(0x850f, 0);
1362 #elif defined(TCC_TARGET_ARM)
1364 o(0x1A000000 | encbranch(ind
, 0, 1));
1365 #elif defined(TCC_TARGET_C67) || defined(TCC_TARGET_ARM64)
1366 tcc_error("not implemented");
1368 #error not supported
1372 /* compare low. Always unsigned */
1376 else if (op1
== TOK_LE
)
1378 else if (op1
== TOK_GT
)
1380 else if (op1
== TOK_GE
)
1391 /* handle integer constant optimizations and various machine
1393 static void gen_opic(int op
)
1395 int c1
, c2
, t1
, t2
, n
;
1398 typedef unsigned long long U
;
1402 t1
= v1
->type
.t
& VT_BTYPE
;
1403 t2
= v2
->type
.t
& VT_BTYPE
;
1407 else if (v1
->type
.t
& VT_UNSIGNED
)
1414 else if (v2
->type
.t
& VT_UNSIGNED
)
1419 /* currently, we cannot do computations with forward symbols */
1420 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1421 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1424 case '+': l1
+= l2
; break;
1425 case '-': l1
-= l2
; break;
1426 case '&': l1
&= l2
; break;
1427 case '^': l1
^= l2
; break;
1428 case '|': l1
|= l2
; break;
1429 case '*': l1
*= l2
; break;
1436 /* if division by zero, generate explicit division */
1439 tcc_error("division by zero in constant");
1443 default: l1
/= l2
; break;
1444 case '%': l1
%= l2
; break;
1445 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1446 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1449 case TOK_SHL
: l1
<<= l2
; break;
1450 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1451 case TOK_SAR
: l1
>>= l2
; break;
1453 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1454 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1455 case TOK_EQ
: l1
= l1
== l2
; break;
1456 case TOK_NE
: l1
= l1
!= l2
; break;
1457 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1458 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1459 case TOK_LT
: l1
= l1
< l2
; break;
1460 case TOK_GE
: l1
= l1
>= l2
; break;
1461 case TOK_LE
: l1
= l1
<= l2
; break;
1462 case TOK_GT
: l1
= l1
> l2
; break;
1464 case TOK_LAND
: l1
= l1
&& l2
; break;
1465 case TOK_LOR
: l1
= l1
|| l2
; break;
1472 /* if commutative ops, put c2 as constant */
1473 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1474 op
== '|' || op
== '*')) {
1476 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1477 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1479 /* Filter out NOP operations like x*1, x-0, x&-1... */
1480 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1483 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1484 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1490 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1491 /* try to use shifts instead of muls or divs */
1492 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1501 else if (op
== TOK_PDIV
)
1507 } else if (c2
&& (op
== '+' || op
== '-') &&
1508 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1509 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1510 /* symbol + constant case */
1517 if (!nocode_wanted
) {
1518 /* call low level op generator */
1519 if (t1
== VT_LLONG
|| t2
== VT_LLONG
||
1520 (PTR_SIZE
== 8 && (t1
== VT_PTR
|| t2
== VT_PTR
)))
1531 /* generate a floating point operation with constant propagation */
1532 static void gen_opif(int op
)
1540 /* currently, we cannot do computations with forward symbols */
1541 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1542 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1544 if (v1
->type
.t
== VT_FLOAT
) {
1547 } else if (v1
->type
.t
== VT_DOUBLE
) {
1555 /* NOTE: we only do constant propagation if finite number (not
1556 NaN or infinity) (ANSI spec) */
1557 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1561 case '+': f1
+= f2
; break;
1562 case '-': f1
-= f2
; break;
1563 case '*': f1
*= f2
; break;
1567 tcc_error("division by zero in constant");
1572 /* XXX: also handles tests ? */
1576 /* XXX: overflow test ? */
1577 if (v1
->type
.t
== VT_FLOAT
) {
1579 } else if (v1
->type
.t
== VT_DOUBLE
) {
1587 if (!nocode_wanted
) {
1595 static int pointed_size(CType
*type
)
1598 return type_size(pointed_type(type
), &align
);
1601 static void vla_runtime_pointed_size(CType
*type
)
1604 vla_runtime_type_size(pointed_type(type
), &align
);
1607 static inline int is_null_pointer(SValue
*p
)
1609 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1611 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1612 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0) ||
1613 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&& p
->c
.ptr_offset
== 0);
1616 static inline int is_integer_btype(int bt
)
1618 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1619 bt
== VT_INT
|| bt
== VT_LLONG
);
1622 /* check types for comparison or subtraction of pointers */
1623 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1625 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1628 /* null pointers are accepted for all comparisons as gcc */
1629 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1633 bt1
= type1
->t
& VT_BTYPE
;
1634 bt2
= type2
->t
& VT_BTYPE
;
1635 /* accept comparison between pointer and integer with a warning */
1636 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1637 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1638 tcc_warning("comparison between pointer and integer");
1642 /* both must be pointers or implicit function pointers */
1643 if (bt1
== VT_PTR
) {
1644 type1
= pointed_type(type1
);
1645 } else if (bt1
!= VT_FUNC
)
1646 goto invalid_operands
;
1648 if (bt2
== VT_PTR
) {
1649 type2
= pointed_type(type2
);
1650 } else if (bt2
!= VT_FUNC
) {
1652 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1654 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1655 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1659 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1660 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1661 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1662 /* gcc-like error if '-' is used */
1664 goto invalid_operands
;
1666 tcc_warning("comparison of distinct pointer types lacks a cast");
1670 /* generic gen_op: handles types problems */
1671 ST_FUNC
void gen_op(int op
)
1673 int u
, t1
, t2
, bt1
, bt2
, t
;
1676 t1
= vtop
[-1].type
.t
;
1677 t2
= vtop
[0].type
.t
;
1678 bt1
= t1
& VT_BTYPE
;
1679 bt2
= t2
& VT_BTYPE
;
1681 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1682 /* at least one operand is a pointer */
1683 /* relationnal op: must be both pointers */
1684 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1685 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1686 /* pointers are handled are unsigned */
1687 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1688 t
= VT_LLONG
| VT_UNSIGNED
;
1690 t
= VT_INT
| VT_UNSIGNED
;
1694 /* if both pointers, then it must be the '-' op */
1695 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1697 tcc_error("cannot use pointers here");
1698 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1699 /* XXX: check that types are compatible */
1700 if (vtop
[-1].type
.t
& VT_VLA
) {
1701 vla_runtime_pointed_size(&vtop
[-1].type
);
1703 vpushi(pointed_size(&vtop
[-1].type
));
1707 /* set to integer type */
1708 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1709 vtop
->type
.t
= VT_LLONG
;
1711 vtop
->type
.t
= VT_INT
;
1716 /* exactly one pointer : must be '+' or '-'. */
1717 if (op
!= '-' && op
!= '+')
1718 tcc_error("cannot use pointers here");
1719 /* Put pointer as first operand */
1720 if (bt2
== VT_PTR
) {
1724 type1
= vtop
[-1].type
;
1725 type1
.t
&= ~VT_ARRAY
;
1726 if (vtop
[-1].type
.t
& VT_VLA
)
1727 vla_runtime_pointed_size(&vtop
[-1].type
);
1729 u
= pointed_size(&vtop
[-1].type
);
1731 tcc_error("unknown array element size");
1732 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1735 /* XXX: cast to int ? (long long case) */
1740 #ifdef CONFIG_TCC_BCHECK
1741 /* if evaluating constant expression, no code should be
1742 generated, so no bound check */
1743 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1744 /* if bounded pointers, we generate a special code to
1751 gen_bounded_ptr_add();
1757 /* put again type if gen_opic() swaped operands */
1760 } else if (is_float(bt1
) || is_float(bt2
)) {
1761 /* compute bigger type and do implicit casts */
1762 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1764 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1769 /* floats can only be used for a few operations */
1770 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1771 (op
< TOK_ULT
|| op
> TOK_GT
))
1772 tcc_error("invalid operands for binary operation");
1774 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
1775 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
1776 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
1779 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1780 /* cast to biggest op */
1782 /* convert to unsigned if it does not fit in a long long */
1783 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1784 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1787 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1788 tcc_error("comparison of struct");
1790 /* integer operations */
1792 /* convert to unsigned if it does not fit in an integer */
1793 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1794 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1797 /* XXX: currently, some unsigned operations are explicit, so
1798 we modify them here */
1799 if (t
& VT_UNSIGNED
) {
1806 else if (op
== TOK_LT
)
1808 else if (op
== TOK_GT
)
1810 else if (op
== TOK_LE
)
1812 else if (op
== TOK_GE
)
1819 /* special case for shifts and long long: we keep the shift as
1821 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1828 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1829 /* relationnal op: the result is an int */
1830 vtop
->type
.t
= VT_INT
;
1837 #ifndef TCC_TARGET_ARM
1838 /* generic itof for unsigned long long case */
1839 static void gen_cvt_itof1(int t
)
1841 #ifdef TCC_TARGET_ARM64
1844 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1845 (VT_LLONG
| VT_UNSIGNED
)) {
1848 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1849 #if LDOUBLE_SIZE != 8
1850 else if (t
== VT_LDOUBLE
)
1851 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1854 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1858 vtop
->r
= reg_fret(t
);
1866 /* generic ftoi for unsigned long long case */
1867 static void gen_cvt_ftoi1(int t
)
1869 #ifdef TCC_TARGET_ARM64
1874 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1875 /* not handled natively */
1876 st
= vtop
->type
.t
& VT_BTYPE
;
1878 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1879 #if LDOUBLE_SIZE != 8
1880 else if (st
== VT_LDOUBLE
)
1881 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1884 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1889 vtop
->r2
= REG_LRET
;
1896 /* force char or short cast */
1897 static void force_charshort_cast(int t
)
1901 /* XXX: add optimization if lvalue : just change type and offset */
1906 if (t
& VT_UNSIGNED
) {
1907 vpushi((1 << bits
) - 1);
1913 /* result must be signed or the SAR is converted to an SHL
1914 This was not the case when "t" was a signed short
1915 and the last value on the stack was an unsigned int */
1916 vtop
->type
.t
&= ~VT_UNSIGNED
;
1922 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1923 static void gen_cast(CType
*type
)
1925 int sbt
, dbt
, sf
, df
, c
, p
;
1927 /* special delayed cast for char/short */
1928 /* XXX: in some cases (multiple cascaded casts), it may still
1930 if (vtop
->r
& VT_MUSTCAST
) {
1931 vtop
->r
&= ~VT_MUSTCAST
;
1932 force_charshort_cast(vtop
->type
.t
);
1935 /* bitfields first get cast to ints */
1936 if (vtop
->type
.t
& VT_BITFIELD
) {
1940 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1941 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1946 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1947 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1949 /* constant case: we can do it now */
1950 /* XXX: in ISOC, cannot do it if error in convert */
1951 if (sbt
== VT_FLOAT
)
1952 vtop
->c
.ld
= vtop
->c
.f
;
1953 else if (sbt
== VT_DOUBLE
)
1954 vtop
->c
.ld
= vtop
->c
.d
;
1957 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1958 if (sbt
& VT_UNSIGNED
)
1959 vtop
->c
.ld
= vtop
->c
.ull
;
1961 vtop
->c
.ld
= vtop
->c
.ll
;
1963 if (sbt
& VT_UNSIGNED
)
1964 vtop
->c
.ld
= vtop
->c
.ui
;
1966 vtop
->c
.ld
= vtop
->c
.i
;
1969 if (dbt
== VT_FLOAT
)
1970 vtop
->c
.f
= (float)vtop
->c
.ld
;
1971 else if (dbt
== VT_DOUBLE
)
1972 vtop
->c
.d
= (double)vtop
->c
.ld
;
1973 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1974 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1975 } else if (sf
&& dbt
== VT_BOOL
) {
1976 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1979 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1980 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1981 vtop
->c
.ll
= vtop
->c
.ull
;
1982 else if (sbt
& VT_UNSIGNED
)
1983 vtop
->c
.ll
= vtop
->c
.ui
;
1984 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1985 else if (sbt
== VT_PTR
)
1988 else if (sbt
!= VT_LLONG
)
1989 vtop
->c
.ll
= vtop
->c
.i
;
1991 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1992 vtop
->c
.ull
= vtop
->c
.ll
;
1993 else if (dbt
== VT_BOOL
)
1994 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1995 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1996 else if (dbt
== VT_PTR
)
1999 else if (dbt
!= VT_LLONG
) {
2001 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
2003 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
2005 if(dbt
& VT_UNSIGNED
)
2006 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
2008 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
2011 } else if (p
&& dbt
== VT_BOOL
) {
2014 } else if (!nocode_wanted
) {
2015 /* non constant case: generate code */
2017 /* convert from fp to fp */
2020 /* convert int to fp */
2023 /* convert fp to int */
2024 if (dbt
== VT_BOOL
) {
2028 /* we handle char/short/etc... with generic code */
2029 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
2030 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
2034 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
2035 /* additional cast for char/short... */
2040 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
2041 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
2042 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
2043 /* scalar to long long */
2044 /* machine independent conversion */
2046 /* generate high word */
2047 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2051 if (sbt
== VT_PTR
) {
2052 /* cast from pointer to int before we apply
2053 shift operation, which pointers don't support*/
2054 gen_cast(&int_type
);
2060 /* patch second register */
2061 vtop
[-1].r2
= vtop
->r
;
2065 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2066 (dbt
& VT_BTYPE
) == VT_PTR
||
2067 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2068 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2069 (sbt
& VT_BTYPE
) != VT_PTR
&&
2070 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2071 /* need to convert from 32bit to 64bit */
2073 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2074 #if defined(TCC_TARGET_ARM64)
2076 #elif defined(TCC_TARGET_X86_64)
2078 /* x86_64 specific: movslq */
2080 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2087 } else if (dbt
== VT_BOOL
) {
2088 /* scalar to bool */
2091 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2092 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2093 if (sbt
== VT_PTR
) {
2094 vtop
->type
.t
= VT_INT
;
2095 tcc_warning("nonportable conversion from pointer to char/short");
2097 force_charshort_cast(dbt
);
2098 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2100 if (sbt
== VT_LLONG
) {
2101 /* from long long: just take low order word */
2105 /* if lvalue and single word type, nothing to do because
2106 the lvalue already contains the real type size (see
2107 VT_LVAL_xxx constants) */
2110 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2111 /* if we are casting between pointer types,
2112 we must update the VT_LVAL_xxx size */
2113 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2114 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2119 /* return type size as known at compile time. Put alignment at 'a' */
2120 ST_FUNC
int type_size(CType
*type
, int *a
)
2125 bt
= type
->t
& VT_BTYPE
;
2126 if (bt
== VT_STRUCT
) {
2131 } else if (bt
== VT_PTR
) {
2132 if (type
->t
& VT_ARRAY
) {
2136 ts
= type_size(&s
->type
, a
);
2138 if (ts
< 0 && s
->c
< 0)
2146 } else if (bt
== VT_LDOUBLE
) {
2148 return LDOUBLE_SIZE
;
2149 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2150 #ifdef TCC_TARGET_I386
2151 #ifdef TCC_TARGET_PE
2156 #elif defined(TCC_TARGET_ARM)
2166 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2169 } else if (bt
== VT_SHORT
) {
2172 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2176 /* char, void, function, _Bool */
2182 /* push type size as known at runtime time on top of value stack. Put
2184 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2186 if (type
->t
& VT_VLA
) {
2187 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2189 vpushi(type_size(type
, a
));
2193 static void vla_sp_save(void) {
2194 if (!(vla_flags
& VLA_SP_LOC_SET
)) {
2195 *vla_sp_loc
= (loc
-= PTR_SIZE
);
2196 vla_flags
|= VLA_SP_LOC_SET
;
2198 if (!(vla_flags
& VLA_SP_SAVED
)) {
2199 gen_vla_sp_save(*vla_sp_loc
);
2200 vla_flags
|= VLA_SP_SAVED
;
2204 /* return the pointed type of t */
2205 static inline CType
*pointed_type(CType
*type
)
2207 return &type
->ref
->type
;
2210 /* modify type so that its it is a pointer to type. */
2211 ST_FUNC
void mk_pointer(CType
*type
)
2214 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2215 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2219 /* compare function types. OLD functions match any new functions */
2220 static int is_compatible_func(CType
*type1
, CType
*type2
)
2226 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2228 /* check func_call */
2229 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2231 /* XXX: not complete */
2232 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2236 while (s1
!= NULL
) {
2239 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2249 /* return true if type1 and type2 are the same. If unqualified is
2250 true, qualifiers on the types are ignored.
2252 - enums are not checked as gcc __builtin_types_compatible_p ()
2254 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2258 t1
= type1
->t
& VT_TYPE
;
2259 t2
= type2
->t
& VT_TYPE
;
2261 /* strip qualifiers before comparing */
2262 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2263 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2265 /* Default Vs explicit signedness only matters for char */
2266 if ((t1
& VT_BTYPE
) != VT_BYTE
) {
2270 /* XXX: bitfields ? */
2273 /* test more complicated cases */
2274 bt1
= t1
& VT_BTYPE
;
2275 if (bt1
== VT_PTR
) {
2276 type1
= pointed_type(type1
);
2277 type2
= pointed_type(type2
);
2278 return is_compatible_types(type1
, type2
);
2279 } else if (bt1
== VT_STRUCT
) {
2280 return (type1
->ref
== type2
->ref
);
2281 } else if (bt1
== VT_FUNC
) {
2282 return is_compatible_func(type1
, type2
);
2288 /* return true if type1 and type2 are exactly the same (including
2291 static int is_compatible_types(CType
*type1
, CType
*type2
)
2293 return compare_types(type1
,type2
,0);
2296 /* return true if type1 and type2 are the same (ignoring qualifiers).
2298 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2300 return compare_types(type1
,type2
,1);
2303 /* print a type. If 'varstr' is not NULL, then the variable is also
2304 printed in the type */
2306 /* XXX: add array and function pointers */
2307 static void type_to_str(char *buf
, int buf_size
,
2308 CType
*type
, const char *varstr
)
2315 t
= type
->t
& VT_TYPE
;
2318 if (t
& VT_CONSTANT
)
2319 pstrcat(buf
, buf_size
, "const ");
2320 if (t
& VT_VOLATILE
)
2321 pstrcat(buf
, buf_size
, "volatile ");
2322 if ((t
& (VT_DEFSIGN
| VT_UNSIGNED
)) == (VT_DEFSIGN
| VT_UNSIGNED
))
2323 pstrcat(buf
, buf_size
, "unsigned ");
2324 else if (t
& VT_DEFSIGN
)
2325 pstrcat(buf
, buf_size
, "signed ");
2355 tstr
= "long double";
2357 pstrcat(buf
, buf_size
, tstr
);
2361 if (bt
== VT_STRUCT
)
2365 pstrcat(buf
, buf_size
, tstr
);
2366 v
= type
->ref
->v
& ~SYM_STRUCT
;
2367 if (v
>= SYM_FIRST_ANOM
)
2368 pstrcat(buf
, buf_size
, "<anonymous>");
2370 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2374 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2375 pstrcat(buf
, buf_size
, "(");
2377 while (sa
!= NULL
) {
2378 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2379 pstrcat(buf
, buf_size
, buf1
);
2382 pstrcat(buf
, buf_size
, ", ");
2384 pstrcat(buf
, buf_size
, ")");
2388 pstrcpy(buf1
, sizeof(buf1
), "*");
2390 pstrcat(buf1
, sizeof(buf1
), varstr
);
2391 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2395 pstrcat(buf
, buf_size
, " ");
2396 pstrcat(buf
, buf_size
, varstr
);
2401 /* verify type compatibility to store vtop in 'dt' type, and generate
2403 static void gen_assign_cast(CType
*dt
)
2405 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2406 char buf1
[256], buf2
[256];
2409 st
= &vtop
->type
; /* source type */
2410 dbt
= dt
->t
& VT_BTYPE
;
2411 sbt
= st
->t
& VT_BTYPE
;
2412 if (sbt
== VT_VOID
|| dbt
== VT_VOID
)
2413 tcc_error("cannot cast from/to void");
2414 if (dt
->t
& VT_CONSTANT
)
2415 tcc_warning("assignment of read-only location");
2418 /* special cases for pointers */
2419 /* '0' can also be a pointer */
2420 if (is_null_pointer(vtop
))
2422 /* accept implicit pointer to integer cast with warning */
2423 if (is_integer_btype(sbt
)) {
2424 tcc_warning("assignment makes pointer from integer without a cast");
2427 type1
= pointed_type(dt
);
2428 /* a function is implicitely a function pointer */
2429 if (sbt
== VT_FUNC
) {
2430 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2431 !is_compatible_types(pointed_type(dt
), st
))
2432 tcc_warning("assignment from incompatible pointer type");
2437 type2
= pointed_type(st
);
2438 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2439 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2440 /* void * can match anything */
2442 /* exact type match, except for unsigned */
2445 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2447 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2449 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2450 tcc_warning("assignment from incompatible pointer type");
2452 /* check const and volatile */
2453 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2454 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2455 tcc_warning("assignment discards qualifiers from pointer target type");
2461 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2462 tcc_warning("assignment makes integer from pointer without a cast");
2464 /* XXX: more tests */
2469 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2470 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2471 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2473 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2474 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2475 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2483 /* store vtop in lvalue pushed on stack */
2484 ST_FUNC
void vstore(void)
2486 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2488 ft
= vtop
[-1].type
.t
;
2489 sbt
= vtop
->type
.t
& VT_BTYPE
;
2490 dbt
= ft
& VT_BTYPE
;
2491 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2492 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2493 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2494 /* optimize char/short casts */
2495 delayed_cast
= VT_MUSTCAST
;
2496 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2497 /* XXX: factorize */
2498 if (ft
& VT_CONSTANT
)
2499 tcc_warning("assignment of read-only location");
2502 if (!(ft
& VT_BITFIELD
))
2503 gen_assign_cast(&vtop
[-1].type
);
2506 if (sbt
== VT_STRUCT
) {
2507 /* if structure, only generate pointer */
2508 /* structure assignment : generate memcpy */
2509 /* XXX: optimize if small size */
2510 if (!nocode_wanted
) {
2511 size
= type_size(&vtop
->type
, &align
);
2515 vtop
->type
.t
= VT_PTR
;
2518 /* address of memcpy() */
2521 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2522 else if(!(align
& 3))
2523 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2526 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2531 vtop
->type
.t
= VT_PTR
;
2540 /* leave source on stack */
2541 } else if (ft
& VT_BITFIELD
) {
2542 /* bitfield store handling */
2544 /* save lvalue as expression result (example: s.b = s.a = n;) */
2545 vdup(), vtop
[-1] = vtop
[-2];
2547 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2548 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2549 /* remove bit field info to avoid loops */
2550 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2552 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2553 gen_cast(&vtop
[-1].type
);
2554 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2557 /* duplicate destination */
2559 vtop
[-1] = vtop
[-2];
2561 /* mask and shift source */
2562 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2563 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2564 vpushll((1ULL << bit_size
) - 1ULL);
2566 vpushi((1 << bit_size
) - 1);
2572 /* load destination, mask and or with source */
2574 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2575 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2577 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2583 /* ... and discard */
2587 #ifdef CONFIG_TCC_BCHECK
2588 /* bound check case */
2589 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2595 if (!nocode_wanted
) {
2599 #ifdef TCC_TARGET_X86_64
2600 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2602 } else if ((ft
& VT_BTYPE
) == VT_QFLOAT
) {
2607 r
= gv(rc
); /* generate value */
2608 /* if lvalue was saved on stack, must read it */
2609 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2611 t
= get_reg(RC_INT
);
2612 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2617 sv
.r
= VT_LOCAL
| VT_LVAL
;
2618 sv
.c
.ul
= vtop
[-1].c
.ul
;
2620 vtop
[-1].r
= t
| VT_LVAL
;
2622 /* two word case handling : store second register at word + 4 (or +8 for x86-64) */
2623 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2624 if (((ft
& VT_BTYPE
) == VT_QLONG
) || ((ft
& VT_BTYPE
) == VT_QFLOAT
)) {
2625 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2627 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2628 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
2630 vtop
[-1].type
.t
= load_type
;
2633 /* convert to int to increment easily */
2634 vtop
->type
.t
= addr_type
;
2640 vtop
[-1].type
.t
= load_type
;
2641 /* XXX: it works because r2 is spilled last ! */
2642 store(vtop
->r2
, vtop
- 1);
2648 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2649 vtop
->r
|= delayed_cast
;
2653 /* post defines POST/PRE add. c is the token ++ or -- */
2654 ST_FUNC
void inc(int post
, int c
)
2657 vdup(); /* save lvalue */
2659 gv_dup(); /* duplicate value */
2664 vpushi(c
- TOK_MID
);
2666 vstore(); /* store value */
2668 vpop(); /* if post op, return saved value */
2671 /* Parse GNUC __attribute__ extension. Currently, the following
2672 extensions are recognized:
2673 - aligned(n) : set data/function alignment.
2674 - packed : force data alignment to 1
2675 - section(x) : generate data/code in this section.
2676 - unused : currently ignored, but may be used someday.
2677 - regparm(n) : pass function parameters in registers (i386 only)
2679 static void parse_attribute(AttributeDef
*ad
)
2683 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2687 while (tok
!= ')') {
2688 if (tok
< TOK_IDENT
)
2689 expect("attribute name");
2697 expect("section name");
2698 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2706 expect("alias(\"target\")");
2707 ad
->alias_target
= /* save string as token, for later */
2708 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2712 case TOK_VISIBILITY1
:
2713 case TOK_VISIBILITY2
:
2716 expect("visibility(\"default|hidden|internal|protected\")");
2717 if (!strcmp (tokc
.cstr
->data
, "default"))
2718 ad
->a
.visibility
= STV_DEFAULT
;
2719 else if (!strcmp (tokc
.cstr
->data
, "hidden"))
2720 ad
->a
.visibility
= STV_HIDDEN
;
2721 else if (!strcmp (tokc
.cstr
->data
, "internal"))
2722 ad
->a
.visibility
= STV_INTERNAL
;
2723 else if (!strcmp (tokc
.cstr
->data
, "protected"))
2724 ad
->a
.visibility
= STV_PROTECTED
;
2726 expect("visibility(\"default|hidden|internal|protected\")");
2735 if (n
<= 0 || (n
& (n
- 1)) != 0)
2736 tcc_error("alignment must be a positive power of two");
2753 /* currently, no need to handle it because tcc does not
2754 track unused objects */
2758 /* currently, no need to handle it because tcc does not
2759 track unused objects */
2764 ad
->a
.func_call
= FUNC_CDECL
;
2769 ad
->a
.func_call
= FUNC_STDCALL
;
2771 #ifdef TCC_TARGET_I386
2781 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
2787 ad
->a
.func_call
= FUNC_FASTCALLW
;
2794 ad
->a
.mode
= VT_LLONG
+ 1;
2797 ad
->a
.mode
= VT_SHORT
+ 1;
2800 ad
->a
.mode
= VT_INT
+ 1;
2803 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2810 ad
->a
.func_export
= 1;
2813 ad
->a
.func_import
= 1;
2816 if (tcc_state
->warn_unsupported
)
2817 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2818 /* skip parameters */
2820 int parenthesis
= 0;
2824 else if (tok
== ')')
2827 } while (parenthesis
&& tok
!= -1);
2840 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2841 static void struct_decl(CType
*type
, int u
, int tdef
)
2843 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
;
2844 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2845 Sym
*s
, *ss
, *ass
, **ps
;
2849 a
= tok
; /* save decl type */
2854 /* struct already defined ? return it */
2856 expect("struct/union/enum name");
2860 tcc_error("invalid type");
2862 } else if (tok
>= TOK_IDENT
&& !tdef
)
2863 tcc_error("unknown struct/union/enum");
2869 /* we put an undefined size for struct/union */
2870 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2871 s
->r
= 0; /* default alignment is zero as gcc */
2872 /* put struct/union/enum name in type */
2880 tcc_error("struct/union/enum already defined");
2881 /* cannot be empty */
2883 /* non empty enums are not allowed */
2884 if (a
== TOK_ENUM
) {
2888 expect("identifier");
2890 if (ss
&& !local_stack
)
2891 tcc_error("redefinition of enumerator '%s'",
2892 get_tok_str(v
, NULL
));
2898 /* enum symbols have static storage */
2899 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2900 ss
->type
.t
|= VT_STATIC
;
2905 /* NOTE: we accept a trailing comma */
2909 s
->c
= type_size(&int_type
, &align
);
2918 while (tok
!= '}') {
2919 parse_btype(&btype
, &ad
);
2922 tcc_error("flexible array member '%s' not at the end of struct",
2923 get_tok_str(v
, NULL
));
2928 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2929 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2930 expect("identifier");
2931 if (type_size(&type1
, &align
) < 0) {
2932 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
2935 tcc_error("field '%s' has incomplete type",
2936 get_tok_str(v
, NULL
));
2938 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2939 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2940 tcc_error("invalid type for '%s'",
2941 get_tok_str(v
, NULL
));
2945 bit_size
= expr_const();
2946 /* XXX: handle v = 0 case for messages */
2948 tcc_error("negative width in bit-field '%s'",
2949 get_tok_str(v
, NULL
));
2950 if (v
&& bit_size
== 0)
2951 tcc_error("zero width for bit-field '%s'",
2952 get_tok_str(v
, NULL
));
2954 size
= type_size(&type1
, &align
);
2956 if (align
< ad
.a
.aligned
)
2957 align
= ad
.a
.aligned
;
2958 } else if (ad
.a
.packed
) {
2960 } else if (*tcc_state
->pack_stack_ptr
) {
2961 if (align
> *tcc_state
->pack_stack_ptr
)
2962 align
= *tcc_state
->pack_stack_ptr
;
2965 if (bit_size
>= 0) {
2966 bt
= type1
.t
& VT_BTYPE
;
2973 tcc_error("bitfields must have scalar type");
2975 if (bit_size
> bsize
) {
2976 tcc_error("width of '%s' exceeds its type",
2977 get_tok_str(v
, NULL
));
2978 } else if (bit_size
== bsize
) {
2979 /* no need for bit fields */
2981 } else if (bit_size
== 0) {
2982 /* XXX: what to do if only padding in a
2984 /* zero size: means to pad */
2987 /* we do not have enough room ?
2988 did the type change?
2990 if ((bit_pos
+ bit_size
) > bsize
||
2991 bt
!= prevbt
|| a
== TOK_UNION
)
2994 /* XXX: handle LSB first */
2995 type1
.t
|= VT_BITFIELD
|
2996 (bit_pos
<< VT_STRUCT_SHIFT
) |
2997 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2998 bit_pos
+= bit_size
;
3004 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3005 /* add new memory data only if starting
3007 if (lbit_pos
== 0) {
3008 if (a
== TOK_STRUCT
) {
3009 c
= (c
+ align
- 1) & -align
;
3018 if (align
> maxalign
)
3022 printf("add field %s offset=%d",
3023 get_tok_str(v
, NULL
), offset
);
3024 if (type1
.t
& VT_BITFIELD
) {
3025 printf(" pos=%d size=%d",
3026 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3027 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3032 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3034 while ((ass
= ass
->next
) != NULL
) {
3035 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3040 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3044 if (tok
== ';' || tok
== TOK_EOF
)
3051 /* store size and alignment */
3052 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3058 /* return 1 if basic type is a type size (short, long, long long) */
3059 ST_FUNC
int is_btype_size(int bt
)
3061 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3064 /* return 0 if no type declaration. otherwise, return the basic type
3067 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3069 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3073 memset(ad
, 0, sizeof(AttributeDef
));
3081 /* currently, we really ignore extension */
3092 tcc_error("too many basic types");
3094 bt_size
= is_btype_size (u
& VT_BTYPE
);
3095 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3110 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3111 #ifndef TCC_TARGET_PE
3112 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3114 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3115 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3121 #ifdef TCC_TARGET_ARM64
3123 /* GCC's __uint128_t appears in some Linux header files. Make it a
3124 synonym for long double to get the size and alignment right. */
3136 if ((t
& VT_BTYPE
) == VT_LONG
) {
3137 #ifdef TCC_TARGET_PE
3138 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3140 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3148 struct_decl(&type1
, VT_ENUM
, t
& VT_TYPEDEF
);
3151 type
->ref
= type1
.ref
;
3155 struct_decl(&type1
, VT_STRUCT
, t
& VT_TYPEDEF
);
3158 /* type modifiers */
3174 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3175 tcc_error("signed and unsigned modifier");
3188 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3189 tcc_error("signed and unsigned modifier");
3190 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3215 /* GNUC attribute */
3216 case TOK_ATTRIBUTE1
:
3217 case TOK_ATTRIBUTE2
:
3218 parse_attribute(ad
);
3221 t
= (t
& ~VT_BTYPE
) | u
;
3229 parse_expr_type(&type1
);
3230 /* remove all storage modifiers except typedef */
3231 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3237 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3239 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3240 type
->ref
= s
->type
.ref
;
3242 /* get attributes from typedef */
3243 if (0 == ad
->a
.aligned
)
3244 ad
->a
.aligned
= s
->a
.aligned
;
3245 if (0 == ad
->a
.func_call
)
3246 ad
->a
.func_call
= s
->a
.func_call
;
3247 ad
->a
.packed
|= s
->a
.packed
;
3256 if (tcc_state
->char_is_unsigned
) {
3257 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3261 /* long is never used as type */
3262 if ((t
& VT_BTYPE
) == VT_LONG
)
3263 #if (!defined TCC_TARGET_X86_64 && !defined TCC_TARGET_ARM64) || \
3264 defined TCC_TARGET_PE
3265 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3267 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3273 /* convert a function parameter type (array to pointer and function to
3274 function pointer) */
3275 static inline void convert_parameter_type(CType
*pt
)
3277 /* remove const and volatile qualifiers (XXX: const could be used
3278 to indicate a const function parameter */
3279 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3280 /* array must be transformed to pointer according to ANSI C */
3282 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3287 ST_FUNC
void parse_asm_str(CString
*astr
)
3290 /* read the string */
3292 expect("string constant");
3294 while (tok
== TOK_STR
) {
3295 /* XXX: add \0 handling too ? */
3296 cstr_cat(astr
, tokc
.cstr
->data
);
3299 cstr_ccat(astr
, '\0');
3302 /* Parse an asm label and return the label
3303 * Don't forget to free the CString in the caller! */
3304 static void asm_label_instr(CString
*astr
)
3307 parse_asm_str(astr
);
3310 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3314 static void post_type(CType
*type
, AttributeDef
*ad
)
3316 int n
, l
, t1
, arg_size
, align
;
3317 Sym
**plast
, *s
, *first
;
3322 /* function declaration */
3330 /* read param name and compute offset */
3331 if (l
!= FUNC_OLD
) {
3332 if (!parse_btype(&pt
, &ad1
)) {
3334 tcc_error("invalid type");
3341 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3343 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3344 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3345 tcc_error("parameter declared as void");
3346 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3351 expect("identifier");
3355 convert_parameter_type(&pt
);
3356 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3362 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3369 /* if no parameters, then old type prototype */
3373 /* NOTE: const is ignored in returned type as it has a special
3374 meaning in gcc / C++ */
3375 type
->t
&= ~VT_CONSTANT
;
3376 /* some ancient pre-K&R C allows a function to return an array
3377 and the array brackets to be put after the arguments, such
3378 that "int c()[]" means something like "int[] c()" */
3381 skip(']'); /* only handle simple "[]" */
3384 /* we push a anonymous symbol which will contain the function prototype */
3385 ad
->a
.func_args
= arg_size
;
3386 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3391 } else if (tok
== '[') {
3392 /* array definition */
3394 if (tok
== TOK_RESTRICT1
)
3399 if (!local_stack
|| nocode_wanted
)
3400 vpushi(expr_const());
3402 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3405 tcc_error("invalid array size");
3407 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3408 tcc_error("size of variable length array should be an integer");
3413 /* parse next post type */
3414 post_type(type
, ad
);
3415 if (type
->t
== VT_FUNC
)
3416 tcc_error("declaration of an array of functions");
3417 t1
|= type
->t
& VT_VLA
;
3420 loc
-= type_size(&int_type
, &align
);
3424 vla_runtime_type_size(type
, &align
);
3426 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3433 /* we push an anonymous symbol which will contain the array
3435 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3436 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3441 /* Parse a type declaration (except basic type), and return the type
3442 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3443 expected. 'type' should contain the basic type. 'ad' is the
3444 attribute definition of the basic type. It can be modified by
3447 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3450 CType type1
, *type2
;
3451 int qualifiers
, storage
;
3453 while (tok
== '*') {
3461 qualifiers
|= VT_CONSTANT
;
3466 qualifiers
|= VT_VOLATILE
;
3474 type
->t
|= qualifiers
;
3477 /* XXX: clarify attribute handling */
3478 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3479 parse_attribute(ad
);
3481 /* recursive type */
3482 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3483 type1
.t
= 0; /* XXX: same as int */
3486 /* XXX: this is not correct to modify 'ad' at this point, but
3487 the syntax is not clear */
3488 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3489 parse_attribute(ad
);
3490 type_decl(&type1
, ad
, v
, td
);
3493 /* type identifier */
3494 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3498 if (!(td
& TYPE_ABSTRACT
))
3499 expect("identifier");
3503 storage
= type
->t
& VT_STORAGE
;
3504 type
->t
&= ~VT_STORAGE
;
3505 if (storage
& VT_STATIC
) {
3506 int saved_nocode_wanted
= nocode_wanted
;
3508 post_type(type
, ad
);
3509 nocode_wanted
= saved_nocode_wanted
;
3511 post_type(type
, ad
);
3513 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3514 parse_attribute(ad
);
3518 /* append type at the end of type1 */
3531 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3532 ST_FUNC
int lvalue_type(int t
)
3537 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3539 else if (bt
== VT_SHORT
)
3543 if (t
& VT_UNSIGNED
)
3544 r
|= VT_LVAL_UNSIGNED
;
3548 /* indirection with full error checking and bound check */
3549 ST_FUNC
void indir(void)
3551 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3552 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3556 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3558 vtop
->type
= *pointed_type(&vtop
->type
);
3559 /* Arrays and functions are never lvalues */
3560 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3561 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3562 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3563 /* if bound checking, the referenced pointer must be checked */
3564 #ifdef CONFIG_TCC_BCHECK
3565 if (tcc_state
->do_bounds_check
)
3566 vtop
->r
|= VT_MUSTBOUND
;
3571 /* pass a parameter to a function and do type checking and casting */
3572 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3577 func_type
= func
->c
;
3578 if (func_type
== FUNC_OLD
||
3579 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3580 /* default casting : only need to convert float to double */
3581 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3584 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3585 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3588 } else if (arg
== NULL
) {
3589 tcc_error("too many arguments to function");
3592 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3593 gen_assign_cast(&type
);
3597 /* parse an expression of the form '(type)' or '(expr)' and return its
3599 static void parse_expr_type(CType
*type
)
3605 if (parse_btype(type
, &ad
)) {
3606 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3613 static void parse_type(CType
*type
)
3618 if (!parse_btype(type
, &ad
)) {
3621 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3624 static void vpush_tokc(int t
)
3629 vsetc(&type
, VT_CONST
, &tokc
);
3632 ST_FUNC
void unary(void)
3634 int n
, t
, align
, size
, r
, sizeof_caller
;
3638 static int in_sizeof
= 0;
3640 sizeof_caller
= in_sizeof
;
3642 /* XXX: GCC 2.95.3 does not generate a table although it should be
3656 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3660 vpush_tokc(VT_LLONG
);
3664 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3668 vpush_tokc(VT_FLOAT
);
3672 vpush_tokc(VT_DOUBLE
);
3676 vpush_tokc(VT_LDOUBLE
);
3679 case TOK___FUNCTION__
:
3681 goto tok_identifier
;
3687 /* special function name identifier */
3688 len
= strlen(funcname
) + 1;
3689 /* generate char[len] type */
3694 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3695 ptr
= section_ptr_add(data_section
, len
);
3696 memcpy(ptr
, funcname
, len
);
3701 #ifdef TCC_TARGET_PE
3702 t
= VT_SHORT
| VT_UNSIGNED
;
3708 /* string parsing */
3711 if (tcc_state
->warn_write_strings
)
3716 memset(&ad
, 0, sizeof(AttributeDef
));
3717 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3722 if (parse_btype(&type
, &ad
)) {
3723 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3725 /* check ISOC99 compound literal */
3727 /* data is allocated locally by default */
3732 /* all except arrays are lvalues */
3733 if (!(type
.t
& VT_ARRAY
))
3734 r
|= lvalue_type(type
.t
);
3735 memset(&ad
, 0, sizeof(AttributeDef
));
3736 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3738 if (sizeof_caller
) {
3745 } else if (tok
== '{') {
3746 /* save all registers */
3748 /* statement expression : we do not accept break/continue
3749 inside as GCC does */
3750 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3765 /* functions names must be treated as function pointers,
3766 except for unary '&' and sizeof. Since we consider that
3767 functions are not lvalues, we only have to handle it
3768 there and in function calls. */
3769 /* arrays can also be used although they are not lvalues */
3770 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3771 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3773 mk_pointer(&vtop
->type
);
3779 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3781 boolean
.t
= VT_BOOL
;
3783 vtop
->c
.i
= !vtop
->c
.i
;
3784 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3785 vtop
->c
.i
= vtop
->c
.i
^ 1;
3788 vseti(VT_JMP
, gvtst(1, 0));
3800 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3801 tcc_error("pointer not accepted for unary plus");
3802 /* In order to force cast, we add zero, except for floating point
3803 where we really need an noop (otherwise -0.0 will be transformed
3805 if (!is_float(vtop
->type
.t
)) {
3816 unary_type(&type
); // Perform a in_sizeof = 0;
3817 size
= type_size(&type
, &align
);
3818 if (t
== TOK_SIZEOF
) {
3819 if (!(type
.t
& VT_VLA
)) {
3821 tcc_error("sizeof applied to an incomplete type");
3824 vla_runtime_type_size(&type
, &align
);
3829 vtop
->type
.t
|= VT_UNSIGNED
;
3832 case TOK_builtin_types_compatible_p
:
3841 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3842 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3843 vpushi(is_compatible_types(&type1
, &type2
));
3846 case TOK_builtin_constant_p
:
3848 int saved_nocode_wanted
, res
;
3851 saved_nocode_wanted
= nocode_wanted
;
3854 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3856 nocode_wanted
= saved_nocode_wanted
;
3861 case TOK_builtin_frame_address
:
3867 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3868 tcc_error("__builtin_frame_address only takes positive integers");
3875 vset(&type
, VT_LOCAL
, 0); /* local frame */
3877 mk_pointer(&vtop
->type
);
3878 indir(); /* -> parent frame */
3882 #ifdef TCC_TARGET_X86_64
3883 #ifdef TCC_TARGET_PE
3884 case TOK_builtin_va_start
:
3892 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
3893 tcc_error("__builtin_va_start expects a local variable");
3894 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
3895 vtop
->type
= char_pointer_type
;
3900 case TOK_builtin_va_arg_types
:
3907 vpushi(classify_x86_64_va_arg(&type
));
3913 #ifdef TCC_TARGET_ARM64
3914 case TOK___va_start
: {
3924 vtop
->type
.t
= VT_VOID
;
3927 case TOK___va_arg
: {
3952 t
= vtop
->type
.t
& VT_BTYPE
;
3954 /* In IEEE negate(x) isn't subtract(0,x), but rather
3959 else if (t
== VT_DOUBLE
)
3970 goto tok_identifier
;
3972 /* allow to take the address of a label */
3973 if (tok
< TOK_UIDENT
)
3974 expect("label identifier");
3975 s
= label_find(tok
);
3977 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3979 if (s
->r
== LABEL_DECLARED
)
3980 s
->r
= LABEL_FORWARD
;
3983 s
->type
.t
= VT_VOID
;
3984 mk_pointer(&s
->type
);
3985 s
->type
.t
|= VT_STATIC
;
3987 vpushsym(&s
->type
, s
);
3991 // special qnan , snan and infinity values
3993 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3997 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
4001 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
4010 expect("identifier");
4013 const char *name
= get_tok_str(t
, NULL
);
4015 tcc_error("'%s' undeclared", name
);
4016 /* for simple function calls, we tolerate undeclared
4017 external reference to int() function */
4018 if (tcc_state
->warn_implicit_function_declaration
4019 #ifdef TCC_TARGET_PE
4020 /* people must be warned about using undeclared WINAPI functions
4021 (which usually start with uppercase letter) */
4022 || (name
[0] >= 'A' && name
[0] <= 'Z')
4025 tcc_warning("implicit declaration of function '%s'", name
);
4026 s
= external_global_sym(t
, &func_old_type
, 0);
4028 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
4029 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
4030 /* if referencing an inline function, then we generate a
4031 symbol to it if not already done. It will have the
4032 effect to generate code for it at the end of the
4033 compilation unit. Inline function as always
4034 generated in the text section. */
4036 put_extern_sym(s
, text_section
, 0, 0);
4037 r
= VT_SYM
| VT_CONST
;
4041 vset(&s
->type
, r
, s
->c
);
4042 /* if forward reference, we must point to s */
4043 if (vtop
->r
& VT_SYM
) {
4045 vtop
->c
.ptr_offset
= 0;
4050 /* post operations */
4052 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4055 } else if (tok
== '.' || tok
== TOK_ARROW
) {
4058 if (tok
== TOK_ARROW
)
4060 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4064 /* expect pointer on structure */
4065 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4066 expect("struct or union");
4070 while ((s
= s
->next
) != NULL
) {
4075 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
4076 /* add field offset to pointer */
4077 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4080 /* change type to field type, and set to lvalue */
4081 vtop
->type
= s
->type
;
4082 vtop
->type
.t
|= qualifiers
;
4083 /* an array is never an lvalue */
4084 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4085 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4086 #ifdef CONFIG_TCC_BCHECK
4087 /* if bound checking, the referenced pointer must be checked */
4088 if (tcc_state
->do_bounds_check
)
4089 vtop
->r
|= VT_MUSTBOUND
;
4093 } else if (tok
== '[') {
4099 } else if (tok
== '(') {
4102 int nb_args
, ret_nregs
, ret_align
, variadic
;
4105 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4106 /* pointer test (no array accepted) */
4107 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4108 vtop
->type
= *pointed_type(&vtop
->type
);
4109 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4113 expect("function pointer");
4116 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4118 /* get return type */
4121 sa
= s
->next
; /* first parameter */
4124 /* compute first implicit argument if a structure is returned */
4125 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4126 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4127 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4130 /* get some space for the returned structure */
4131 size
= type_size(&s
->type
, &align
);
4132 #ifdef TCC_TARGET_ARM64
4133 /* On arm64, a small struct is return in registers.
4134 It is much easier to write it to memory if we know
4135 that we are allowed to write some extra bytes, so
4136 round the allocated space up to a power of 2: */
4138 while (size
& (size
- 1))
4139 size
= (size
| (size
- 1)) + 1;
4141 loc
= (loc
- size
) & -align
;
4143 ret
.r
= VT_LOCAL
| VT_LVAL
;
4144 /* pass it as 'int' to avoid structure arg passing
4146 vseti(VT_LOCAL
, loc
);
4156 /* return in register */
4157 if (is_float(ret
.type
.t
)) {
4158 ret
.r
= reg_fret(ret
.type
.t
);
4159 #ifdef TCC_TARGET_X86_64
4160 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4164 #ifndef TCC_TARGET_ARM64
4165 #ifdef TCC_TARGET_X86_64
4166 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4168 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4179 gfunc_param_typed(s
, sa
);
4189 tcc_error("too few arguments to function");
4191 if (!nocode_wanted
) {
4192 gfunc_call(nb_args
);
4194 vtop
-= (nb_args
+ 1);
4198 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4199 vsetc(&ret
.type
, r
, &ret
.c
);
4200 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4203 /* handle packed struct return */
4204 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4207 size
= type_size(&s
->type
, &align
);
4208 loc
= (loc
- size
) & -align
;
4212 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4216 if (--ret_nregs
== 0)
4218 /* XXX: compatible with arm only: ret_align == register_size */
4219 offset
+= ret_align
;
4221 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4229 ST_FUNC
void expr_prod(void)
4234 while (tok
== '*' || tok
== '/' || tok
== '%') {
4242 ST_FUNC
void expr_sum(void)
4247 while (tok
== '+' || tok
== '-') {
4255 static void expr_shift(void)
4260 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4268 static void expr_cmp(void)
4273 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4274 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4282 static void expr_cmpeq(void)
4287 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4295 static void expr_and(void)
4298 while (tok
== '&') {
4305 static void expr_xor(void)
4308 while (tok
== '^') {
4315 static void expr_or(void)
4318 while (tok
== '|') {
4325 /* XXX: fix this mess */
4326 static void expr_land_const(void)
4329 while (tok
== TOK_LAND
) {
4336 /* XXX: fix this mess */
4337 static void expr_lor_const(void)
4340 while (tok
== TOK_LOR
) {
4347 /* only used if non constant */
4348 static void expr_land(void)
4353 if (tok
== TOK_LAND
) {
4358 if (tok
!= TOK_LAND
) {
4368 static void expr_lor(void)
4373 if (tok
== TOK_LOR
) {
4378 if (tok
!= TOK_LOR
) {
4388 /* XXX: better constant handling */
4389 static void expr_cond(void)
4391 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4393 CType type
, type1
, type2
;
4400 boolean
.t
= VT_BOOL
;
4406 if (tok
!= ':' || !gnu_ext
) {
4421 if (vtop
!= vstack
) {
4422 /* needed to avoid having different registers saved in
4424 if (is_float(vtop
->type
.t
)) {
4426 #ifdef TCC_TARGET_X86_64
4427 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4437 if (tok
== ':' && gnu_ext
) {
4445 sv
= *vtop
; /* save value to handle it later */
4446 vtop
--; /* no vpop so that FP stack is not flushed */
4454 bt1
= t1
& VT_BTYPE
;
4456 bt2
= t2
& VT_BTYPE
;
4457 /* cast operands to correct type according to ISOC rules */
4458 if (is_float(bt1
) || is_float(bt2
)) {
4459 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4460 type
.t
= VT_LDOUBLE
;
4461 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4466 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4467 /* cast to biggest op */
4469 /* convert to unsigned if it does not fit in a long long */
4470 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4471 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4472 type
.t
|= VT_UNSIGNED
;
4473 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4474 /* If one is a null ptr constant the result type
4476 if (is_null_pointer (vtop
))
4478 else if (is_null_pointer (&sv
))
4480 /* XXX: test pointer compatibility, C99 has more elaborate
4484 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4485 /* XXX: test function pointer compatibility */
4486 type
= bt1
== VT_FUNC
? type1
: type2
;
4487 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4488 /* XXX: test structure compatibility */
4489 type
= bt1
== VT_STRUCT
? type1
: type2
;
4490 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4491 /* NOTE: as an extension, we accept void on only one side */
4494 /* integer operations */
4496 /* convert to unsigned if it does not fit in an integer */
4497 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4498 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4499 type
.t
|= VT_UNSIGNED
;
4502 /* now we convert second operand */
4504 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4507 if (is_float(type
.t
)) {
4509 #ifdef TCC_TARGET_X86_64
4510 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4514 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4515 /* for long longs, we use fixed registers to avoid having
4516 to handle a complicated move */
4521 /* this is horrible, but we must also convert first
4525 /* put again first value and cast it */
4528 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4531 move_reg(r2
, r1
, type
.t
);
4538 static void expr_eq(void)
4544 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4545 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4546 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4561 ST_FUNC
void gexpr(void)
4572 /* parse an expression and return its type without any side effect. */
4573 static void expr_type(CType
*type
)
4575 int saved_nocode_wanted
;
4577 saved_nocode_wanted
= nocode_wanted
;
4582 nocode_wanted
= saved_nocode_wanted
;
4585 /* parse a unary expression and return its type without any side
4587 static void unary_type(CType
*type
)
4599 /* parse a constant expression and return value in vtop. */
4600 static void expr_const1(void)
4609 /* parse an integer constant and return its value. */
4610 ST_FUNC
int expr_const(void)
4614 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4615 expect("constant expression");
4621 /* return the label token if current token is a label, otherwise
4623 static int is_label(void)
4627 /* fast test first */
4628 if (tok
< TOK_UIDENT
)
4630 /* no need to save tokc because tok is an identifier */
4637 unget_tok(last_tok
);
4642 static void label_or_decl(int l
)
4646 /* fast test first */
4647 if (tok
>= TOK_UIDENT
)
4649 /* no need to save tokc because tok is an identifier */
4653 unget_tok(last_tok
);
4656 unget_tok(last_tok
);
4661 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4662 int case_reg
, int is_expr
)
4665 Sym
*s
, *frame_bottom
;
4667 /* generate line number info */
4668 if (tcc_state
->do_debug
&&
4669 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4670 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4672 last_line_num
= file
->line_num
;
4676 /* default return value is (void) */
4678 vtop
->type
.t
= VT_VOID
;
4681 if (tok
== TOK_IF
) {
4688 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4690 if (c
== TOK_ELSE
) {
4694 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4695 gsym(d
); /* patch else jmp */
4698 } else if (tok
== TOK_WHILE
) {
4706 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4710 } else if (tok
== '{') {
4712 int block_vla_sp_loc
, *saved_vla_sp_loc
, saved_vla_flags
;
4715 /* record local declaration stack position */
4717 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4718 frame_bottom
->next
= scope_stack_bottom
;
4719 scope_stack_bottom
= frame_bottom
;
4720 llabel
= local_label_stack
;
4722 /* save VLA state */
4723 block_vla_sp_loc
= *(saved_vla_sp_loc
= vla_sp_loc
);
4724 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4725 vla_sp_loc
= &block_vla_sp_loc
;
4727 saved_vla_flags
= vla_flags
;
4728 vla_flags
|= VLA_NEED_NEW_FRAME
;
4730 /* handle local labels declarations */
4731 if (tok
== TOK_LABEL
) {
4734 if (tok
< TOK_UIDENT
)
4735 expect("label identifier");
4736 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4746 while (tok
!= '}') {
4747 label_or_decl(VT_LOCAL
);
4751 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4754 /* pop locally defined labels */
4755 label_pop(&local_label_stack
, llabel
);
4757 /* XXX: this solution makes only valgrind happy...
4758 triggered by gcc.c-torture/execute/20000917-1.c */
4760 switch(vtop
->type
.t
& VT_BTYPE
) {
4765 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4767 tcc_error("unsupported expression type");
4770 /* pop locally defined symbols */
4771 scope_stack_bottom
= scope_stack_bottom
->next
;
4772 sym_pop(&local_stack
, s
);
4774 /* Pop VLA frames and restore stack pointer if required */
4775 if (saved_vla_sp_loc
!= &vla_sp_root_loc
)
4776 *saved_vla_sp_loc
= block_vla_sp_loc
;
4777 if (vla_sp_loc
!= (saved_vla_sp_loc
== &vla_sp_root_loc
? &vla_sp_root_loc
: &block_vla_sp_loc
)) {
4778 vla_sp_loc
= saved_vla_sp_loc
;
4779 gen_vla_sp_restore(*vla_sp_loc
);
4781 vla_flags
= (vla_flags
& ~VLA_SCOPE_FLAGS
) | (saved_vla_flags
& VLA_SCOPE_FLAGS
);
4784 } else if (tok
== TOK_RETURN
) {
4788 gen_assign_cast(&func_vt
);
4789 #ifdef TCC_TARGET_ARM64
4790 // Perhaps it would be better to use this for all backends:
4793 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4794 CType type
, ret_type
;
4795 int ret_align
, ret_nregs
;
4796 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
4798 if (0 == ret_nregs
) {
4799 /* if returning structure, must copy it to implicit
4800 first pointer arg location */
4803 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4806 /* copy structure value to pointer */
4809 /* returning structure packed into registers */
4810 int r
, size
, addr
, align
;
4811 size
= type_size(&func_vt
,&align
);
4812 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& (ret_align
-1)))
4813 && (align
& (ret_align
-1))) {
4814 loc
= (loc
- size
) & -align
;
4817 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4820 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
4822 vtop
->type
= ret_type
;
4823 if (is_float(ret_type
.t
))
4824 r
= rc_fret(ret_type
.t
);
4830 if (--ret_nregs
== 0)
4832 /* We assume that when a structure is returned in multiple
4833 registers, their classes are consecutive values of the
4836 /* XXX: compatible with arm only: ret_align == register_size */
4837 vtop
->c
.i
+= ret_align
;
4838 vtop
->r
= VT_LOCAL
| VT_LVAL
;
4841 } else if (is_float(func_vt
.t
)) {
4842 gv(rc_fret(func_vt
.t
));
4847 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4850 rsym
= gjmp(rsym
); /* jmp */
4851 } else if (tok
== TOK_BREAK
) {
4854 tcc_error("cannot break");
4855 *bsym
= gjmp(*bsym
);
4858 } else if (tok
== TOK_CONTINUE
) {
4861 tcc_error("cannot continue");
4862 *csym
= gjmp(*csym
);
4865 } else if (tok
== TOK_FOR
) {
4870 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4871 frame_bottom
->next
= scope_stack_bottom
;
4872 scope_stack_bottom
= frame_bottom
;
4874 /* c99 for-loop init decl? */
4875 if (!decl0(VT_LOCAL
, 1)) {
4876 /* no, regular for-loop init expr */
4900 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4904 scope_stack_bottom
= scope_stack_bottom
->next
;
4905 sym_pop(&local_stack
, s
);
4907 if (tok
== TOK_DO
) {
4912 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4923 if (tok
== TOK_SWITCH
) {
4927 /* XXX: other types than integer */
4928 case_reg
= gv(RC_INT
);
4932 b
= gjmp(0); /* jump to first case */
4934 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4935 /* if no default, jmp after switch */
4943 if (tok
== TOK_CASE
) {
4950 if (gnu_ext
&& tok
== TOK_DOTS
) {
4954 tcc_warning("empty case range");
4956 /* since a case is like a label, we must skip it with a jmp */
4964 *case_sym
= gtst(1, 0);
4967 *case_sym
= gtst(1, 0);
4971 *case_sym
= gtst(1, *case_sym
);
4973 case_reg
= gv(RC_INT
);
4978 goto block_after_label
;
4980 if (tok
== TOK_DEFAULT
) {
4986 tcc_error("too many 'default'");
4989 goto block_after_label
;
4991 if (tok
== TOK_GOTO
) {
4993 if (tok
== '*' && gnu_ext
) {
4997 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
5000 } else if (tok
>= TOK_UIDENT
) {
5001 s
= label_find(tok
);
5002 /* put forward definition if needed */
5004 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
5006 if (s
->r
== LABEL_DECLARED
)
5007 s
->r
= LABEL_FORWARD
;
5009 /* label already defined */
5010 if (vla_flags
& VLA_IN_SCOPE
) {
5011 /* If VLAs are in use, save the current stack pointer and
5012 reset the stack pointer to what it was at function entry
5013 (label will restore stack pointer in inner scopes) */
5015 gen_vla_sp_restore(vla_sp_root_loc
);
5017 if (s
->r
& LABEL_FORWARD
)
5018 s
->jnext
= gjmp(s
->jnext
);
5020 gjmp_addr(s
->jnext
);
5023 expect("label identifier");
5026 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
5032 if (vla_flags
& VLA_IN_SCOPE
) {
5033 /* save/restore stack pointer across label
5034 this is a no-op when combined with the load immediately
5035 after the label unless we arrive via goto */
5040 if (s
->r
== LABEL_DEFINED
)
5041 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
5043 s
->r
= LABEL_DEFINED
;
5045 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
5048 if (vla_flags
& VLA_IN_SCOPE
) {
5049 gen_vla_sp_restore(*vla_sp_loc
);
5050 vla_flags
|= VLA_NEED_NEW_FRAME
;
5052 /* we accept this, but it is a mistake */
5055 tcc_warning("deprecated use of label at end of compound statement");
5059 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
5062 /* expression case */
5077 /* t is the array or struct type. c is the array or struct
5078 address. cur_index/cur_field is the pointer to the current
5079 value. 'size_only' is true if only size info is needed (only used
5081 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5082 int *cur_index
, Sym
**cur_field
,
5086 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5092 if (gnu_ext
&& (l
= is_label()) != 0)
5094 while (tok
== '[' || tok
== '.') {
5096 if (!(type
->t
& VT_ARRAY
))
5097 expect("array type");
5100 index
= expr_const();
5101 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5102 expect("invalid index");
5103 if (tok
== TOK_DOTS
&& gnu_ext
) {
5105 index_last
= expr_const();
5106 if (index_last
< 0 ||
5107 (s
->c
>= 0 && index_last
>= s
->c
) ||
5109 expect("invalid index");
5115 *cur_index
= index_last
;
5116 type
= pointed_type(type
);
5117 elem_size
= type_size(type
, &align
);
5118 c
+= index
* elem_size
;
5119 /* NOTE: we only support ranges for last designator */
5120 nb_elems
= index_last
- index
+ 1;
5121 if (nb_elems
!= 1) {
5130 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5131 expect("struct/union type");
5144 /* XXX: fix this mess by using explicit storage field */
5146 type1
.t
|= (type
->t
& ~VT_TYPE
);
5160 if (type
->t
& VT_ARRAY
) {
5162 type
= pointed_type(type
);
5163 c
+= index
* type_size(type
, &align
);
5167 tcc_error("too many field init");
5168 /* XXX: fix this mess by using explicit storage field */
5170 type1
.t
|= (type
->t
& ~VT_TYPE
);
5175 decl_initializer(type
, sec
, c
, 0, size_only
);
5177 /* XXX: make it more general */
5178 if (!size_only
&& nb_elems
> 1) {
5179 unsigned long c_end
;
5184 tcc_error("range init not supported yet for dynamic storage");
5185 c_end
= c
+ nb_elems
* elem_size
;
5186 if (c_end
> sec
->data_allocated
)
5187 section_realloc(sec
, c_end
);
5188 src
= sec
->data
+ c
;
5190 for(i
= 1; i
< nb_elems
; i
++) {
5192 memcpy(dst
, src
, elem_size
);
5198 #define EXPR_CONST 1
5201 /* store a value or an expression directly in global data or in local array */
5202 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5203 int v
, int expr_type
)
5205 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5207 unsigned long long bit_mask
;
5215 /* compound literals must be allocated globally in this case */
5216 saved_global_expr
= global_expr
;
5219 global_expr
= saved_global_expr
;
5220 /* NOTE: symbols are accepted */
5221 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5222 tcc_error("initializer element is not constant");
5230 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5233 /* XXX: not portable */
5234 /* XXX: generate error if incorrect relocation */
5235 gen_assign_cast(&dtype
);
5236 bt
= type
->t
& VT_BTYPE
;
5237 /* we'll write at most 16 bytes */
5238 if (c
+ 16 > sec
->data_allocated
) {
5239 section_realloc(sec
, c
+ 16);
5241 ptr
= sec
->data
+ c
;
5242 /* XXX: make code faster ? */
5243 if (!(type
->t
& VT_BITFIELD
)) {
5248 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5249 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5250 bit_mask
= (1LL << bit_size
) - 1;
5252 if ((vtop
->r
& VT_SYM
) &&
5258 (bt
== VT_INT
&& bit_size
!= 32)))
5259 tcc_error("initializer element is not computable at load time");
5261 /* XXX: when cross-compiling we assume that each type has the
5262 same representation on host and target, which is likely to
5263 be wrong in the case of long double */
5265 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5267 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5270 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5273 *(double *)ptr
= vtop
->c
.d
;
5276 *(long double *)ptr
= vtop
->c
.ld
;
5279 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
5282 addr_t val
= (vtop
->c
.ptr_offset
& bit_mask
) << bit_pos
;
5283 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5284 if (vtop
->r
& VT_SYM
)
5285 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5287 *(addr_t
*)ptr
|= val
;
5289 if (vtop
->r
& VT_SYM
)
5290 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5291 *(addr_t
*)ptr
|= val
;
5296 int val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5297 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5298 if (vtop
->r
& VT_SYM
)
5299 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5303 if (vtop
->r
& VT_SYM
)
5304 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5312 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5319 /* put zeros for variable based init */
5320 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5323 /* nothing to do because globals are already set to zero */
5325 vpush_global_sym(&func_old_type
, TOK_memset
);
5327 #ifdef TCC_TARGET_ARM
5338 /* 't' contains the type and storage info. 'c' is the offset of the
5339 object in section 'sec'. If 'sec' is NULL, it means stack based
5340 allocation. 'first' is true if array '{' must be read (multi
5341 dimension implicit array init handling). 'size_only' is true if
5342 size only evaluation is wanted (only for arrays). */
5343 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5344 int first
, int size_only
)
5346 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5347 int size1
, align1
, expr_type
;
5351 if (type
->t
& VT_VLA
) {
5354 /* save current stack pointer */
5355 if (vla_flags
& VLA_NEED_NEW_FRAME
) {
5357 vla_flags
= VLA_IN_SCOPE
;
5358 vla_sp_loc
= &vla_sp_loc_tmp
;
5361 vla_runtime_type_size(type
, &a
);
5362 gen_vla_alloc(type
, a
);
5363 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5367 } else if (type
->t
& VT_ARRAY
) {
5371 t1
= pointed_type(type
);
5372 size1
= type_size(t1
, &align1
);
5375 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5378 tcc_error("character array initializer must be a literal,"
5379 " optionally enclosed in braces");
5384 /* only parse strings here if correct type (otherwise: handle
5385 them as ((w)char *) expressions */
5386 if ((tok
== TOK_LSTR
&&
5387 #ifdef TCC_TARGET_PE
5388 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5390 (t1
->t
& VT_BTYPE
) == VT_INT
5392 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5393 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5398 /* compute maximum number of chars wanted */
5400 cstr_len
= cstr
->size
;
5402 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5405 if (n
>= 0 && nb
> (n
- array_length
))
5406 nb
= n
- array_length
;
5409 tcc_warning("initializer-string for array is too long");
5410 /* in order to go faster for common case (char
5411 string in global variable, we handle it
5413 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5414 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5418 ch
= ((unsigned char *)cstr
->data
)[i
];
5420 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5421 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5429 /* only add trailing zero if enough storage (no
5430 warning in this case since it is standard) */
5431 if (n
< 0 || array_length
< n
) {
5433 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5439 while (tok
!= '}') {
5440 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5441 if (n
>= 0 && index
>= n
)
5442 tcc_error("index too large");
5443 /* must put zero in holes (note that doing it that way
5444 ensures that it even works with designators) */
5445 if (!size_only
&& array_length
< index
) {
5446 init_putz(t1
, sec
, c
+ array_length
* size1
,
5447 (index
- array_length
) * size1
);
5450 if (index
> array_length
)
5451 array_length
= index
;
5452 /* special test for multi dimensional arrays (may not
5453 be strictly correct if designators are used at the
5455 if (index
>= n
&& no_oblock
)
5464 /* put zeros at the end */
5465 if (!size_only
&& n
>= 0 && array_length
< n
) {
5466 init_putz(t1
, sec
, c
+ array_length
* size1
,
5467 (n
- array_length
) * size1
);
5469 /* patch type size if needed */
5471 s
->c
= array_length
;
5472 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5473 (sec
|| !first
|| tok
== '{')) {
5476 /* NOTE: the previous test is a specific case for automatic
5477 struct/union init */
5478 /* XXX: union needs only one init */
5480 /* XXX: this test is incorrect for local initializers
5481 beginning with ( without {. It would be much more difficult
5482 to do it correctly (ideally, the expression parser should
5483 be used in all cases) */
5489 while (tok
== '(') {
5493 if (!parse_btype(&type1
, &ad1
))
5495 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5497 if (!is_assignable_types(type
, &type1
))
5498 tcc_error("invalid type for cast");
5503 if (first
|| tok
== '{') {
5512 while (tok
!= '}') {
5513 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5515 if (!size_only
&& array_length
< index
) {
5516 init_putz(type
, sec
, c
+ array_length
,
5517 index
- array_length
);
5519 index
= index
+ type_size(&f
->type
, &align1
);
5520 if (index
> array_length
)
5521 array_length
= index
;
5523 /* gr: skip fields from same union - ugly. */
5525 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5526 /* test for same offset */
5527 if (f
->next
->c
!= f
->c
)
5529 /* if yes, test for bitfield shift */
5530 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5531 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5532 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5533 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5534 if (bit_pos_1
!= bit_pos_2
)
5541 if (no_oblock
&& f
== NULL
)
5547 /* put zeros at the end */
5548 if (!size_only
&& array_length
< n
) {
5549 init_putz(type
, sec
, c
+ array_length
,
5558 } else if (tok
== '{') {
5560 decl_initializer(type
, sec
, c
, first
, size_only
);
5562 } else if (size_only
) {
5563 /* just skip expression */
5564 parlevel
= parlevel1
= 0;
5565 while ((parlevel
> 0 || parlevel1
> 0 ||
5566 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5569 else if (tok
== ')')
5571 else if (tok
== '{')
5573 else if (tok
== '}')
5578 /* currently, we always use constant expression for globals
5579 (may change for scripting case) */
5580 expr_type
= EXPR_CONST
;
5582 expr_type
= EXPR_ANY
;
5583 init_putv(type
, sec
, c
, 0, expr_type
);
5587 /* parse an initializer for type 't' if 'has_init' is non zero, and
5588 allocate space in local or global data space ('r' is either
5589 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5590 variable 'v' with an associated name represented by 'asm_label' of
5591 scope 'scope' is declared before initializers are parsed. If 'v' is
5592 zero, then a reference to the new object is put in the value stack.
5593 If 'has_init' is 2, a special parsing is done to handle string
5595 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5596 int has_init
, int v
, char *asm_label
,
5599 int size
, align
, addr
, data_offset
;
5601 ParseState saved_parse_state
= {0};
5602 TokenString init_str
;
5604 Sym
*flexible_array
;
5606 flexible_array
= NULL
;
5607 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5608 Sym
*field
= type
->ref
->next
;
5611 field
= field
->next
;
5612 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5613 flexible_array
= field
;
5617 size
= type_size(type
, &align
);
5618 /* If unknown size, we must evaluate it before
5619 evaluating initializers because
5620 initializers can generate global data too
5621 (e.g. string pointers or ISOC99 compound
5622 literals). It also simplifies local
5623 initializers handling */
5624 tok_str_new(&init_str
);
5625 if ((size
< 0 || flexible_array
) && has_init
) {
5626 /* get all init string */
5627 if (has_init
== 2) {
5628 /* only get strings */
5629 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5630 tok_str_add_tok(&init_str
);
5635 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5637 tcc_error("unexpected end of file in initializer");
5638 tok_str_add_tok(&init_str
);
5641 else if (tok
== '}') {
5651 tok_str_add(&init_str
, -1);
5652 tok_str_add(&init_str
, 0);
5655 save_parse_state(&saved_parse_state
);
5657 macro_ptr
= init_str
.str
;
5659 decl_initializer(type
, NULL
, 0, 1, 1);
5660 /* prepare second initializer parsing */
5661 macro_ptr
= init_str
.str
;
5664 size
= type_size(type
, &align
);
5667 /* if still unknown size, error */
5669 tcc_error("unknown type size");
5671 if (nocode_wanted
) {
5672 //tcc_warning("nocode_wanted set for decl_initializer_alloc");
5678 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5679 /* take into account specified alignment if bigger */
5680 if (ad
->a
.aligned
) {
5681 if (ad
->a
.aligned
> align
)
5682 align
= ad
->a
.aligned
;
5683 } else if (ad
->a
.packed
) {
5686 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5688 #ifdef CONFIG_TCC_BCHECK
5689 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5693 loc
= (loc
- size
) & -align
;
5695 #ifdef CONFIG_TCC_BCHECK
5696 /* handles bounds */
5697 /* XXX: currently, since we do only one pass, we cannot track
5698 '&' operators, so we add only arrays */
5699 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5700 unsigned long *bounds_ptr
;
5701 /* add padding between regions */
5703 /* then add local bound info */
5704 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5705 bounds_ptr
[0] = addr
;
5706 bounds_ptr
[1] = size
;
5710 /* local variable */
5711 sym_push(v
, type
, r
, addr
);
5713 /* push local reference */
5714 vset(type
, r
, addr
);
5720 if (v
&& scope
== VT_CONST
) {
5721 /* see if the symbol was already defined */
5724 if (!is_compatible_types(&sym
->type
, type
))
5725 tcc_error("incompatible types for redefinition of '%s'",
5726 get_tok_str(v
, NULL
));
5727 if (sym
->type
.t
& VT_EXTERN
) {
5728 /* if the variable is extern, it was not allocated */
5729 sym
->type
.t
&= ~VT_EXTERN
;
5730 /* set array size if it was omitted in extern
5732 if ((sym
->type
.t
& VT_ARRAY
) &&
5733 sym
->type
.ref
->c
< 0 &&
5735 sym
->type
.ref
->c
= type
->ref
->c
;
5737 /* we accept several definitions of the same
5738 global variable. this is tricky, because we
5739 must play with the SHN_COMMON type of the symbol */
5740 /* XXX: should check if the variable was already
5741 initialized. It is incorrect to initialized it
5743 /* no init data, we won't add more to the symbol */
5750 /* allocate symbol in corresponding section */
5755 else if (tcc_state
->nocommon
)
5759 data_offset
= sec
->data_offset
;
5760 data_offset
= (data_offset
+ align
- 1) & -align
;
5762 /* very important to increment global pointer at this time
5763 because initializers themselves can create new initializers */
5764 data_offset
+= size
;
5765 #ifdef CONFIG_TCC_BCHECK
5766 /* add padding if bound check */
5767 if (tcc_state
->do_bounds_check
)
5770 sec
->data_offset
= data_offset
;
5771 /* allocate section space to put the data */
5772 if (sec
->sh_type
!= SHT_NOBITS
&&
5773 data_offset
> sec
->data_allocated
)
5774 section_realloc(sec
, data_offset
);
5775 /* align section if needed */
5776 if (align
> sec
->sh_addralign
)
5777 sec
->sh_addralign
= align
;
5779 addr
= 0; /* avoid warning */
5783 if (scope
!= VT_CONST
|| !sym
) {
5784 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5785 sym
->asm_label
= asm_label
;
5787 /* update symbol definition */
5789 put_extern_sym(sym
, sec
, addr
, size
);
5792 /* put a common area */
5793 put_extern_sym(sym
, NULL
, align
, size
);
5794 /* XXX: find a nicer way */
5795 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5796 esym
->st_shndx
= SHN_COMMON
;
5799 /* push global reference */
5800 sym
= get_sym_ref(type
, sec
, addr
, size
);
5801 vpushsym(type
, sym
);
5803 /* patch symbol weakness */
5804 if (type
->t
& VT_WEAK
)
5806 apply_visibility(sym
, type
);
5807 #ifdef CONFIG_TCC_BCHECK
5808 /* handles bounds now because the symbol must be defined
5809 before for the relocation */
5810 if (tcc_state
->do_bounds_check
) {
5811 unsigned long *bounds_ptr
;
5813 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5814 /* then add global bound info */
5815 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5816 bounds_ptr
[0] = 0; /* relocated */
5817 bounds_ptr
[1] = size
;
5821 if (has_init
|| (type
->t
& VT_VLA
)) {
5822 decl_initializer(type
, sec
, addr
, 1, 0);
5823 /* patch flexible array member size back to -1, */
5824 /* for possible subsequent similar declarations */
5826 flexible_array
->type
.ref
->c
= -1;
5829 /* restore parse state if needed */
5831 tok_str_free(init_str
.str
);
5832 restore_parse_state(&saved_parse_state
);
5836 static void put_func_debug(Sym
*sym
)
5841 /* XXX: we put here a dummy type */
5842 snprintf(buf
, sizeof(buf
), "%s:%c1",
5843 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5844 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5845 cur_text_section
, sym
->c
);
5846 /* //gr gdb wants a line at the function */
5847 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5852 /* parse an old style function declaration list */
5853 /* XXX: check multiple parameter */
5854 static void func_decl_list(Sym
*func_sym
)
5861 /* parse each declaration */
5862 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5863 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5864 if (!parse_btype(&btype
, &ad
))
5865 expect("declaration list");
5866 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5867 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5869 /* we accept no variable after */
5873 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5874 /* find parameter in function parameter list */
5877 if ((s
->v
& ~SYM_FIELD
) == v
)
5881 tcc_error("declaration for parameter '%s' but no such parameter",
5882 get_tok_str(v
, NULL
));
5884 /* check that no storage specifier except 'register' was given */
5885 if (type
.t
& VT_STORAGE
)
5886 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5887 convert_parameter_type(&type
);
5888 /* we can add the type (NOTE: it could be local to the function) */
5890 /* accept other parameters */
5901 /* parse a function defined by symbol 'sym' and generate its code in
5902 'cur_text_section' */
5903 static void gen_function(Sym
*sym
)
5905 ind
= cur_text_section
->data_offset
;
5906 /* NOTE: we patch the symbol size later */
5907 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5908 funcname
= get_tok_str(sym
->v
, NULL
);
5910 /* Initialize VLA state */
5911 vla_sp_loc
= &vla_sp_root_loc
;
5912 vla_flags
= VLA_NEED_NEW_FRAME
;
5913 /* put debug symbol */
5914 if (tcc_state
->do_debug
)
5915 put_func_debug(sym
);
5916 /* push a dummy symbol to enable local sym storage */
5917 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5918 gfunc_prolog(&sym
->type
);
5919 #ifdef CONFIG_TCC_BCHECK
5920 if (tcc_state
->do_bounds_check
5921 && !strcmp(get_tok_str(sym
->v
, NULL
), "main")) {
5925 for (i
= 0, sym
= local_stack
; i
< 2; i
++, sym
= sym
->prev
) {
5926 if (sym
->v
& SYM_FIELD
|| sym
->prev
->v
& SYM_FIELD
)
5928 vpush_global_sym(&func_old_type
, TOK___bound_main_arg
);
5929 vset(&sym
->type
, sym
->r
, sym
->c
);
5935 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5938 cur_text_section
->data_offset
= ind
;
5939 label_pop(&global_label_stack
, NULL
);
5940 /* reset local stack */
5941 scope_stack_bottom
= NULL
;
5942 sym_pop(&local_stack
, NULL
);
5943 /* end of function */
5944 /* patch symbol size */
5945 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5947 /* patch symbol weakness (this definition overrules any prototype) */
5948 if (sym
->type
.t
& VT_WEAK
)
5950 apply_visibility(sym
, &sym
->type
);
5951 if (tcc_state
->do_debug
) {
5952 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5954 /* It's better to crash than to generate wrong code */
5955 cur_text_section
= NULL
;
5956 funcname
= ""; /* for safety */
5957 func_vt
.t
= VT_VOID
; /* for safety */
5958 func_var
= 0; /* for safety */
5959 ind
= 0; /* for safety */
5962 ST_FUNC
void gen_inline_functions(void)
5965 int *str
, inline_generated
, i
;
5966 struct InlineFunc
*fn
;
5968 /* iterate while inline function are referenced */
5970 inline_generated
= 0;
5971 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5972 fn
= tcc_state
->inline_fns
[i
];
5974 if (sym
&& sym
->c
) {
5975 /* the function was used: generate its code and
5976 convert it to a normal function */
5977 str
= fn
->token_str
;
5980 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5981 sym
->r
= VT_SYM
| VT_CONST
;
5982 sym
->type
.t
&= ~VT_INLINE
;
5986 cur_text_section
= text_section
;
5988 macro_ptr
= NULL
; /* fail safe */
5990 inline_generated
= 1;
5993 if (!inline_generated
)
5996 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5997 fn
= tcc_state
->inline_fns
[i
];
5998 str
= fn
->token_str
;
6001 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
6004 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
6005 static int decl0(int l
, int is_for_loop_init
)
6013 if (!parse_btype(&btype
, &ad
)) {
6014 if (is_for_loop_init
)
6016 /* skip redundant ';' */
6017 /* XXX: find more elegant solution */
6022 if (l
== VT_CONST
&&
6023 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6024 /* global asm block */
6028 /* special test for old K&R protos without explicit int
6029 type. Only accepted when defining global data */
6030 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
6034 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6035 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6037 /* we accept no variable after */
6041 while (1) { /* iterate thru each declaration */
6042 char *asm_label
; // associated asm label
6044 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6048 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
6049 printf("type = '%s'\n", buf
);
6052 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6053 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
6054 tcc_error("function without file scope cannot be static");
6056 /* if old style function prototype, we accept a
6059 if (sym
->c
== FUNC_OLD
)
6060 func_decl_list(sym
);
6064 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6067 asm_label_instr(&astr
);
6068 asm_label
= tcc_strdup(astr
.data
);
6071 /* parse one last attribute list, after asm label */
6072 parse_attribute(&ad
);
6077 #ifdef TCC_TARGET_PE
6078 if (ad
.a
.func_import
)
6079 type
.t
|= VT_IMPORT
;
6080 if (ad
.a
.func_export
)
6081 type
.t
|= VT_EXPORT
;
6083 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6087 tcc_error("cannot use local functions");
6088 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6089 expect("function definition");
6091 /* reject abstract declarators in function definition */
6093 while ((sym
= sym
->next
) != NULL
)
6094 if (!(sym
->v
& ~SYM_FIELD
))
6095 expect("identifier");
6097 /* XXX: cannot do better now: convert extern line to static inline */
6098 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6099 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6104 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6107 ref
= sym
->type
.ref
;
6108 if (0 == ref
->a
.func_proto
)
6109 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6111 /* use func_call from prototype if not defined */
6112 if (ref
->a
.func_call
!= FUNC_CDECL
6113 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6114 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6116 /* use export from prototype */
6117 if (ref
->a
.func_export
)
6118 type
.ref
->a
.func_export
= 1;
6120 /* use static from prototype */
6121 if (sym
->type
.t
& VT_STATIC
)
6122 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6124 /* If the definition has no visibility use the
6125 one from prototype. */
6126 if (! (type
.t
& VT_VIS_MASK
))
6127 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6129 if (!is_compatible_types(&sym
->type
, &type
)) {
6131 tcc_error("incompatible types for redefinition of '%s'",
6132 get_tok_str(v
, NULL
));
6134 type
.ref
->a
.func_proto
= 0;
6135 /* if symbol is already defined, then put complete type */
6138 /* put function symbol */
6139 sym
= global_identifier_push(v
, type
.t
, 0);
6140 sym
->type
.ref
= type
.ref
;
6143 /* static inline functions are just recorded as a kind
6144 of macro. Their code will be emitted at the end of
6145 the compilation unit only if they are used */
6146 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6147 (VT_INLINE
| VT_STATIC
)) {
6148 TokenString func_str
;
6150 struct InlineFunc
*fn
;
6151 const char *filename
;
6153 tok_str_new(&func_str
);
6159 tcc_error("unexpected end of file");
6160 tok_str_add_tok(&func_str
);
6165 } else if (t
== '}') {
6167 if (block_level
== 0)
6171 tok_str_add(&func_str
, -1);
6172 tok_str_add(&func_str
, 0);
6173 filename
= file
? file
->filename
: "";
6174 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6175 strcpy(fn
->filename
, filename
);
6177 fn
->token_str
= func_str
.str
;
6178 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6181 /* compute text section */
6182 cur_text_section
= ad
.section
;
6183 if (!cur_text_section
)
6184 cur_text_section
= text_section
;
6185 sym
->r
= VT_SYM
| VT_CONST
;
6190 if (btype
.t
& VT_TYPEDEF
) {
6191 /* save typedefed type */
6192 /* XXX: test storage specifiers ? */
6193 sym
= sym_push(v
, &type
, 0, 0);
6195 sym
->type
.t
|= VT_TYPEDEF
;
6198 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6199 /* external function definition */
6200 /* specific case for func_call attribute */
6201 ad
.a
.func_proto
= 1;
6203 } else if (!(type
.t
& VT_ARRAY
)) {
6204 /* not lvalue if array */
6205 r
|= lvalue_type(type
.t
);
6207 has_init
= (tok
== '=');
6208 if (has_init
&& (type
.t
& VT_VLA
))
6209 tcc_error("Variable length array cannot be initialized");
6210 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6211 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6212 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6213 /* external variable or function */
6214 /* NOTE: as GCC, uninitialized global static
6215 arrays of null size are considered as
6217 sym
= external_sym(v
, &type
, r
, asm_label
);
6219 if (ad
.alias_target
) {
6224 alias_target
= sym_find(ad
.alias_target
);
6225 if (!alias_target
|| !alias_target
->c
)
6226 tcc_error("unsupported forward __alias__ attribute");
6227 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6228 tsec
.sh_num
= esym
->st_shndx
;
6229 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6232 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6233 if (type
.t
& VT_STATIC
)
6239 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
6243 if (is_for_loop_init
)
6256 ST_FUNC
void decl(int l
)