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
*define_stack
;
54 ST_DATA Sym
*global_label_stack
;
55 ST_DATA Sym
*local_label_stack
;
57 ST_DATA SValue vstack
[VSTACK_SIZE
], *vtop
;
59 ST_DATA
int const_wanted
; /* true if constant wanted */
60 ST_DATA
int nocode_wanted
; /* true if no code generation wanted for an expression */
61 ST_DATA
int global_expr
; /* true if compound literals must be allocated globally (used during initializers parsing */
62 ST_DATA CType func_vt
; /* current function return type (used by return instruction) */
64 ST_DATA
int last_line_num
, last_ind
, func_ind
; /* debug last line number and pc */
65 ST_DATA
char *funcname
;
67 ST_DATA CType char_pointer_type
, func_old_type
, int_type
;
69 /* ------------------------------------------------------------------------- */
70 static void gen_cast(CType
*type
);
71 static inline CType
*pointed_type(CType
*type
);
72 static int is_compatible_types(CType
*type1
, CType
*type2
);
73 static int parse_btype(CType
*type
, AttributeDef
*ad
);
74 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
75 static void parse_expr_type(CType
*type
);
76 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
77 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
, int case_reg
, int is_expr
);
78 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, int scope
);
79 static void expr_eq(void);
80 static void unary_type(CType
*type
);
81 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
82 static void expr_type(CType
*type
);
84 ST_INLN
int is_float(int t
)
88 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
;
91 ST_FUNC
void test_lvalue(void)
93 if (!(vtop
->r
& VT_LVAL
))
97 /* ------------------------------------------------------------------------- */
98 /* symbol allocator */
99 static Sym
*__sym_malloc(void)
101 Sym
*sym_pool
, *sym
, *last_sym
;
104 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
105 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
107 last_sym
= sym_free_first
;
109 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
110 sym
->next
= last_sym
;
114 sym_free_first
= last_sym
;
118 static inline Sym
*sym_malloc(void)
121 sym
= sym_free_first
;
123 sym
= __sym_malloc();
124 sym_free_first
= sym
->next
;
128 ST_INLN
void sym_free(Sym
*sym
)
130 sym
->next
= sym_free_first
;
131 sym_free_first
= sym
;
134 /* push, without hashing */
135 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
154 /* find a symbol and return its associated structure. 's' is the top
155 of the symbol stack */
156 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
166 /* structure lookup */
167 ST_INLN Sym
*struct_find(int v
)
170 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
172 return table_ident
[v
]->sym_struct
;
175 /* find an identifier */
176 ST_INLN Sym
*sym_find(int v
)
179 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
181 return table_ident
[v
]->sym_identifier
;
184 /* push a given symbol on the symbol stack */
185 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
194 s
= sym_push2(ps
, v
, type
->t
, c
);
195 s
->type
.ref
= type
->ref
;
197 /* don't record fields or anonymous symbols */
199 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
200 /* record symbol in token array */
201 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
203 ps
= &ts
->sym_struct
;
205 ps
= &ts
->sym_identifier
;
212 /* push a global identifier */
213 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
216 s
= sym_push2(&global_stack
, v
, t
, c
);
217 /* don't record anonymous symbol */
218 if (v
< SYM_FIRST_ANOM
) {
219 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
220 /* modify the top most local identifier, so that
221 sym_identifier will point to 's' when popped */
223 ps
= &(*ps
)->prev_tok
;
230 /* pop symbols until top reaches 'b' */
231 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
241 /* remove symbol in token array */
243 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
244 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
246 ps
= &ts
->sym_struct
;
248 ps
= &ts
->sym_identifier
;
257 /* ------------------------------------------------------------------------- */
259 ST_FUNC
void swap(int *p
, int *q
)
267 static void vsetc(CType
*type
, int r
, CValue
*vc
)
271 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
272 error("memory full");
273 /* cannot let cpu flags if other instruction are generated. Also
274 avoid leaving VT_JMP anywhere except on the top of the stack
275 because it would complicate the code generator. */
276 if (vtop
>= vstack
) {
277 v
= vtop
->r
& VT_VALMASK
;
278 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
288 /* push constant of type "type" with useless value */
289 void vpush(CType
*type
)
292 vsetc(type
, VT_CONST
, &cval
);
295 /* push integer constant */
296 ST_FUNC
void vpushi(int v
)
300 vsetc(&int_type
, VT_CONST
, &cval
);
303 /* push long long constant */
304 static void vpushll(long long v
)
311 vsetc(&ctype
, VT_CONST
, &cval
);
314 /* push arbitrary 64bit constant */
315 void vpush64(int ty
, unsigned long long v
)
321 vsetc(&ctype
, VT_CONST
, &cval
);
324 /* Return a static symbol pointing to a section */
325 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
331 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
332 sym
->type
.ref
= type
->ref
;
333 sym
->r
= VT_CONST
| VT_SYM
;
334 put_extern_sym(sym
, sec
, offset
, size
);
338 /* push a reference to a section offset by adding a dummy symbol */
339 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
344 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
345 vtop
->sym
= get_sym_ref(type
, sec
, offset
, size
);
348 /* define a new external reference to a symbol 'v' of type 'u' */
349 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
355 /* push forward reference */
356 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
357 s
->type
.ref
= type
->ref
;
358 s
->r
= r
| VT_CONST
| VT_SYM
;
363 /* define a new external reference to a symbol 'v' of type 'u' */
364 static Sym
*external_sym(int v
, CType
*type
, int r
)
370 /* push forward reference */
371 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
372 if (type
&& type
->ref
&& type
->ref
->a
)
374 s
->type
.t
|= VT_EXTERN
;
375 } else if (s
->type
.ref
== func_old_type
.ref
) {
376 s
->type
.ref
= type
->ref
;
377 s
->r
= r
| VT_CONST
| VT_SYM
;
378 s
->type
.t
|= VT_EXTERN
;
379 } else if (!is_compatible_types(&s
->type
, type
)) {
380 error("incompatible types for redefinition of '%s'",
381 get_tok_str(v
, NULL
));
386 /* push a reference to global symbol v */
387 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
392 sym
= external_global_sym(v
, type
, 0);
394 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
398 ST_FUNC
void vset(CType
*type
, int r
, int v
)
403 vsetc(type
, r
, &cval
);
406 static void vseti(int r
, int v
)
414 ST_FUNC
void vswap(void)
423 ST_FUNC
void vpushv(SValue
*v
)
425 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
426 error("memory full");
431 static void vdup(void)
436 /* save r to the memory stack, and mark it as being free */
437 ST_FUNC
void save_reg(int r
)
439 int l
, saved
, size
, align
;
443 /* modify all stack values */
446 for(p
=vstack
;p
<=vtop
;p
++) {
447 if ((p
->r
& VT_VALMASK
) == r
||
448 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
449 /* must save value on stack if not already done */
451 /* NOTE: must reload 'r' because r might be equal to r2 */
452 r
= p
->r
& VT_VALMASK
;
453 /* store register in the stack */
455 if ((p
->r
& VT_LVAL
) ||
456 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
457 #ifdef TCC_TARGET_X86_64
458 type
= &char_pointer_type
;
462 size
= type_size(type
, &align
);
463 loc
= (loc
- size
) & -align
;
465 sv
.r
= VT_LOCAL
| VT_LVAL
;
468 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
469 /* x86 specific: need to pop fp register ST0 if saved */
471 o(0xd8dd); /* fstp %st(0) */
474 #ifndef TCC_TARGET_X86_64
475 /* special long long case */
476 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
484 /* mark that stack entry as being saved on the stack */
485 if (p
->r
& VT_LVAL
) {
486 /* also clear the bounded flag because the
487 relocation address of the function was stored in
489 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
491 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
499 #ifdef TCC_TARGET_ARM
500 /* find a register of class 'rc2' with at most one reference on stack.
501 * If none, call get_reg(rc) */
502 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
507 for(r
=0;r
<NB_REGS
;r
++) {
508 if (reg_classes
[r
] & rc2
) {
511 for(p
= vstack
; p
<= vtop
; p
++) {
512 if ((p
->r
& VT_VALMASK
) == r
||
513 (p
->r2
& VT_VALMASK
) == r
)
524 /* find a free register of class 'rc'. If none, save one register */
525 ST_FUNC
int get_reg(int rc
)
530 /* find a free register */
531 for(r
=0;r
<NB_REGS
;r
++) {
532 if (reg_classes
[r
] & rc
) {
533 for(p
=vstack
;p
<=vtop
;p
++) {
534 if ((p
->r
& VT_VALMASK
) == r
||
535 (p
->r2
& VT_VALMASK
) == r
)
543 /* no register left : free the first one on the stack (VERY
544 IMPORTANT to start from the bottom to ensure that we don't
545 spill registers used in gen_opi()) */
546 for(p
=vstack
;p
<=vtop
;p
++) {
547 r
= p
->r
& VT_VALMASK
;
548 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
550 /* also look at second register (if long long) */
551 r
= p
->r2
& VT_VALMASK
;
552 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
558 /* Should never comes here */
562 /* save registers up to (vtop - n) stack entry */
563 ST_FUNC
void save_regs(int n
)
568 for(p
= vstack
;p
<= p1
; p
++) {
569 r
= p
->r
& VT_VALMASK
;
576 /* move register 's' to 'r', and flush previous value of r to memory
578 static void move_reg(int r
, int s
)
591 /* get address of vtop (vtop MUST BE an lvalue) */
592 static void gaddrof(void)
595 /* tricky: if saved lvalue, then we can go back to lvalue */
596 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
597 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
600 #ifdef CONFIG_TCC_BCHECK
601 /* generate lvalue bound code */
602 static void gbound(void)
607 vtop
->r
&= ~VT_MUSTBOUND
;
608 /* if lvalue, then use checking code before dereferencing */
609 if (vtop
->r
& VT_LVAL
) {
610 /* if not VT_BOUNDED value, then make one */
611 if (!(vtop
->r
& VT_BOUNDED
)) {
612 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
613 /* must save type because we must set it to int to get pointer */
615 vtop
->type
.t
= VT_INT
;
618 gen_bounded_ptr_add();
619 vtop
->r
|= lval_type
;
622 /* then check for dereferencing */
623 gen_bounded_ptr_deref();
628 /* store vtop a register belonging to class 'rc'. lvalues are
629 converted to values. Cannot be used if cannot be converted to
630 register value (such as structures). */
631 ST_FUNC
int gv(int rc
)
633 int r
, rc2
, bit_pos
, bit_size
, size
, align
, i
;
635 /* NOTE: get_reg can modify vstack[] */
636 if (vtop
->type
.t
& VT_BITFIELD
) {
639 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
640 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
641 /* remove bit field info to avoid loops */
642 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
643 /* cast to int to propagate signedness in following ops */
644 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
649 if((vtop
->type
.t
& VT_UNSIGNED
) ||
650 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
651 type
.t
|= VT_UNSIGNED
;
653 /* generate shifts */
654 vpushi(bits
- (bit_pos
+ bit_size
));
656 vpushi(bits
- bit_size
);
657 /* NOTE: transformed to SHR if unsigned */
661 if (is_float(vtop
->type
.t
) &&
662 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
665 unsigned long offset
;
666 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
670 /* XXX: unify with initializers handling ? */
671 /* CPUs usually cannot use float constants, so we store them
672 generically in data segment */
673 size
= type_size(&vtop
->type
, &align
);
674 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
675 data_section
->data_offset
= offset
;
676 /* XXX: not portable yet */
677 #if defined(__i386__) || defined(__x86_64__)
678 /* Zero pad x87 tenbyte long doubles */
679 if (size
== LDOUBLE_SIZE
)
680 vtop
->c
.tab
[2] &= 0xffff;
682 ptr
= section_ptr_add(data_section
, size
);
684 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
688 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
692 ptr
[i
] = vtop
->c
.tab
[i
];
693 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
694 vtop
->r
|= VT_LVAL
| VT_SYM
;
698 #ifdef CONFIG_TCC_BCHECK
699 if (vtop
->r
& VT_MUSTBOUND
)
703 r
= vtop
->r
& VT_VALMASK
;
707 /* need to reload if:
709 - lvalue (need to dereference pointer)
710 - already a register, but not in the right class */
712 || (vtop
->r
& VT_LVAL
)
713 || !(reg_classes
[r
] & rc
)
714 #ifndef TCC_TARGET_X86_64
715 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
720 #ifndef TCC_TARGET_X86_64
721 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
723 unsigned long long ll
;
724 /* two register type load : expand to two words
726 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
729 vtop
->c
.ui
= ll
; /* first word */
731 vtop
->r
= r
; /* save register value */
732 vpushi(ll
>> 32); /* second word */
733 } else if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
734 (vtop
->r
& VT_LVAL
)) {
735 /* We do not want to modifier the long long
736 pointer here, so the safest (and less
737 efficient) is to save all the other registers
738 in the stack. XXX: totally inefficient. */
740 /* load from memory */
743 vtop
[-1].r
= r
; /* save register value */
744 /* increment pointer to get second word */
745 vtop
->type
.t
= VT_INT
;
754 vtop
[-1].r
= r
; /* save register value */
755 vtop
->r
= vtop
[-1].r2
;
757 /* allocate second register */
761 /* write second register */
765 if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
767 /* lvalue of scalar type : need to use lvalue type
768 because of possible cast */
771 /* compute memory access type */
772 if (vtop
->r
& VT_LVAL_BYTE
)
774 else if (vtop
->r
& VT_LVAL_SHORT
)
776 if (vtop
->r
& VT_LVAL_UNSIGNED
)
780 /* restore wanted type */
783 /* one register type load */
788 #ifdef TCC_TARGET_C67
789 /* uses register pairs for doubles */
790 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
797 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
798 ST_FUNC
void gv2(int rc1
, int rc2
)
802 /* generate more generic register first. But VT_JMP or VT_CMP
803 values must be generated first in all cases to avoid possible
805 v
= vtop
[0].r
& VT_VALMASK
;
806 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
811 /* test if reload is needed for first register */
812 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
822 /* test if reload is needed for first register */
823 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
829 /* wrapper around RC_FRET to return a register by type */
830 static int rc_fret(int t
)
832 #ifdef TCC_TARGET_X86_64
833 if (t
== VT_LDOUBLE
) {
840 /* wrapper around REG_FRET to return a register by type */
841 static int reg_fret(int t
)
843 #ifdef TCC_TARGET_X86_64
844 if (t
== VT_LDOUBLE
) {
851 /* expand long long on stack in two int registers */
852 static void lexpand(void)
856 u
= vtop
->type
.t
& VT_UNSIGNED
;
859 vtop
[0].r
= vtop
[-1].r2
;
860 vtop
[0].r2
= VT_CONST
;
861 vtop
[-1].r2
= VT_CONST
;
862 vtop
[0].type
.t
= VT_INT
| u
;
863 vtop
[-1].type
.t
= VT_INT
| u
;
866 #ifdef TCC_TARGET_ARM
867 /* expand long long on stack */
868 ST_FUNC
void lexpand_nr(void)
872 u
= vtop
->type
.t
& VT_UNSIGNED
;
875 vtop
->type
.t
= VT_INT
| u
;
876 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
878 vtop
[-1].c
.ui
= vtop
->c
.ull
;
879 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
881 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
883 vtop
->r
= vtop
[-1].r
;
884 } else if (v
> VT_CONST
) {
888 vtop
->r
= vtop
[-1].r2
;
889 vtop
[-1].r2
= VT_CONST
;
890 vtop
[-1].type
.t
= VT_INT
| u
;
894 /* build a long long from two ints */
895 static void lbuild(int t
)
898 vtop
[-1].r2
= vtop
[0].r
;
903 /* rotate n first stack elements to the bottom
904 I1 ... In -> I2 ... In I1 [top is right]
906 static void vrotb(int n
)
917 /* rotate n first stack elements to the top
918 I1 ... In -> In I1 ... I(n-1) [top is right]
920 ST_FUNC
void vrott(int n
)
926 for(i
= 0;i
< n
- 1; i
++)
927 vtop
[-i
] = vtop
[-i
- 1];
931 #ifdef TCC_TARGET_ARM
932 /* like vrott but in other direction
933 In ... I1 -> I(n-1) ... I1 In [top is right]
935 ST_FUNC
void vnrott(int n
)
941 for(i
= n
- 1; i
> 0; i
--)
942 vtop
[-i
] = vtop
[-i
+ 1];
947 /* pop stack value */
948 ST_FUNC
void vpop(void)
951 v
= vtop
->r
& VT_VALMASK
;
952 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
953 /* for x86, we need to pop the FP stack */
954 if (v
== TREG_ST0
&& !nocode_wanted
) {
955 o(0xd8dd); /* fstp %st(0) */
958 if (v
== VT_JMP
|| v
== VT_JMPI
) {
959 /* need to put correct jump if && or || without test */
965 /* convert stack entry to register and duplicate its value in another
967 static void gv_dup(void)
973 if ((t
& VT_BTYPE
) == VT_LLONG
) {
980 /* stack: H L L1 H1 */
988 /* duplicate value */
993 #ifdef TCC_TARGET_X86_64
994 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1004 load(r1
, &sv
); /* move r to r1 */
1006 /* duplicates value */
1012 #ifndef TCC_TARGET_X86_64
1013 /* generate CPU independent (unsigned) long long operations */
1014 static void gen_opl(int op
)
1016 int t
, a
, b
, op1
, c
, i
;
1018 unsigned short reg_iret
= REG_IRET
;
1019 unsigned short reg_lret
= REG_LRET
;
1025 func
= TOK___divdi3
;
1028 func
= TOK___udivdi3
;
1031 func
= TOK___moddi3
;
1034 func
= TOK___umoddi3
;
1041 /* call generic long long function */
1042 vpush_global_sym(&func_old_type
, func
);
1047 vtop
->r2
= reg_lret
;
1060 /* stack: L1 H1 L2 H2 */
1065 vtop
[-2] = vtop
[-3];
1068 /* stack: H1 H2 L1 L2 */
1074 /* stack: H1 H2 L1 L2 ML MH */
1077 /* stack: ML MH H1 H2 L1 L2 */
1081 /* stack: ML MH H1 L2 H2 L1 */
1086 /* stack: ML MH M1 M2 */
1089 } else if (op
== '+' || op
== '-') {
1090 /* XXX: add non carry method too (for MIPS or alpha) */
1096 /* stack: H1 H2 (L1 op L2) */
1099 gen_op(op1
+ 1); /* TOK_xxxC2 */
1102 /* stack: H1 H2 (L1 op L2) */
1105 /* stack: (L1 op L2) H1 H2 */
1107 /* stack: (L1 op L2) (H1 op H2) */
1115 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1116 t
= vtop
[-1].type
.t
;
1120 /* stack: L H shift */
1122 /* constant: simpler */
1123 /* NOTE: all comments are for SHL. the other cases are
1124 done by swaping words */
1135 if (op
!= TOK_SAR
) {
1168 /* XXX: should provide a faster fallback on x86 ? */
1171 func
= TOK___ashrdi3
;
1174 func
= TOK___lshrdi3
;
1177 func
= TOK___ashldi3
;
1183 /* compare operations */
1189 /* stack: L1 H1 L2 H2 */
1191 vtop
[-1] = vtop
[-2];
1193 /* stack: L1 L2 H1 H2 */
1196 /* when values are equal, we need to compare low words. since
1197 the jump is inverted, we invert the test too. */
1200 else if (op1
== TOK_GT
)
1202 else if (op1
== TOK_ULT
)
1204 else if (op1
== TOK_UGT
)
1209 if (op1
!= TOK_NE
) {
1213 /* generate non equal test */
1214 /* XXX: NOT PORTABLE yet */
1218 #if defined(TCC_TARGET_I386)
1219 b
= psym(0x850f, 0);
1220 #elif defined(TCC_TARGET_ARM)
1222 o(0x1A000000 | encbranch(ind
, 0, 1));
1223 #elif defined(TCC_TARGET_C67)
1224 error("not implemented");
1226 #error not supported
1230 /* compare low. Always unsigned */
1234 else if (op1
== TOK_LE
)
1236 else if (op1
== TOK_GT
)
1238 else if (op1
== TOK_GE
)
1249 /* handle integer constant optimizations and various machine
1251 static void gen_opic(int op
)
1253 int c1
, c2
, t1
, t2
, n
;
1256 typedef unsigned long long U
;
1260 t1
= v1
->type
.t
& VT_BTYPE
;
1261 t2
= v2
->type
.t
& VT_BTYPE
;
1265 else if (v1
->type
.t
& VT_UNSIGNED
)
1272 else if (v2
->type
.t
& VT_UNSIGNED
)
1277 /* currently, we cannot do computations with forward symbols */
1278 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1279 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1282 case '+': l1
+= l2
; break;
1283 case '-': l1
-= l2
; break;
1284 case '&': l1
&= l2
; break;
1285 case '^': l1
^= l2
; break;
1286 case '|': l1
|= l2
; break;
1287 case '*': l1
*= l2
; break;
1294 /* if division by zero, generate explicit division */
1297 error("division by zero in constant");
1301 default: l1
/= l2
; break;
1302 case '%': l1
%= l2
; break;
1303 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1304 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1307 case TOK_SHL
: l1
<<= l2
; break;
1308 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1309 case TOK_SAR
: l1
>>= l2
; break;
1311 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1312 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1313 case TOK_EQ
: l1
= l1
== l2
; break;
1314 case TOK_NE
: l1
= l1
!= l2
; break;
1315 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1316 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1317 case TOK_LT
: l1
= l1
< l2
; break;
1318 case TOK_GE
: l1
= l1
>= l2
; break;
1319 case TOK_LE
: l1
= l1
<= l2
; break;
1320 case TOK_GT
: l1
= l1
> l2
; break;
1322 case TOK_LAND
: l1
= l1
&& l2
; break;
1323 case TOK_LOR
: l1
= l1
|| l2
; break;
1330 /* if commutative ops, put c2 as constant */
1331 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1332 op
== '|' || op
== '*')) {
1334 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1335 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1337 /* Filter out NOP operations like x*1, x-0, x&-1... */
1338 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1341 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1342 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1348 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1349 /* try to use shifts instead of muls or divs */
1350 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1359 else if (op
== TOK_PDIV
)
1365 } else if (c2
&& (op
== '+' || op
== '-') &&
1366 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1367 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1368 /* symbol + constant case */
1375 if (!nocode_wanted
) {
1376 /* call low level op generator */
1377 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1388 /* generate a floating point operation with constant propagation */
1389 static void gen_opif(int op
)
1397 /* currently, we cannot do computations with forward symbols */
1398 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1399 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1401 if (v1
->type
.t
== VT_FLOAT
) {
1404 } else if (v1
->type
.t
== VT_DOUBLE
) {
1412 /* NOTE: we only do constant propagation if finite number (not
1413 NaN or infinity) (ANSI spec) */
1414 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1418 case '+': f1
+= f2
; break;
1419 case '-': f1
-= f2
; break;
1420 case '*': f1
*= f2
; break;
1424 error("division by zero in constant");
1429 /* XXX: also handles tests ? */
1433 /* XXX: overflow test ? */
1434 if (v1
->type
.t
== VT_FLOAT
) {
1436 } else if (v1
->type
.t
== VT_DOUBLE
) {
1444 if (!nocode_wanted
) {
1452 static int pointed_size(CType
*type
)
1455 return type_size(pointed_type(type
), &align
);
1458 static inline int is_null_pointer(SValue
*p
)
1460 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1462 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1463 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0);
1466 static inline int is_integer_btype(int bt
)
1468 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1469 bt
== VT_INT
|| bt
== VT_LLONG
);
1472 /* check types for comparison or substraction of pointers */
1473 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1475 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1478 /* null pointers are accepted for all comparisons as gcc */
1479 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1483 bt1
= type1
->t
& VT_BTYPE
;
1484 bt2
= type2
->t
& VT_BTYPE
;
1485 /* accept comparison between pointer and integer with a warning */
1486 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1487 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1488 warning("comparison between pointer and integer");
1492 /* both must be pointers or implicit function pointers */
1493 if (bt1
== VT_PTR
) {
1494 type1
= pointed_type(type1
);
1495 } else if (bt1
!= VT_FUNC
)
1496 goto invalid_operands
;
1498 if (bt2
== VT_PTR
) {
1499 type2
= pointed_type(type2
);
1500 } else if (bt2
!= VT_FUNC
) {
1502 error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1504 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1505 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1509 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1510 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1511 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1512 /* gcc-like error if '-' is used */
1514 goto invalid_operands
;
1516 warning("comparison of distinct pointer types lacks a cast");
1520 /* generic gen_op: handles types problems */
1521 ST_FUNC
void gen_op(int op
)
1523 int u
, t1
, t2
, bt1
, bt2
, t
;
1526 t1
= vtop
[-1].type
.t
;
1527 t2
= vtop
[0].type
.t
;
1528 bt1
= t1
& VT_BTYPE
;
1529 bt2
= t2
& VT_BTYPE
;
1531 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1532 /* at least one operand is a pointer */
1533 /* relationnal op: must be both pointers */
1534 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1535 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1536 /* pointers are handled are unsigned */
1537 #ifdef TCC_TARGET_X86_64
1538 t
= VT_LLONG
| VT_UNSIGNED
;
1540 t
= VT_INT
| VT_UNSIGNED
;
1544 /* if both pointers, then it must be the '-' op */
1545 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1547 error("cannot use pointers here");
1548 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1549 /* XXX: check that types are compatible */
1550 u
= pointed_size(&vtop
[-1].type
);
1552 /* set to integer type */
1553 #ifdef TCC_TARGET_X86_64
1554 vtop
->type
.t
= VT_LLONG
;
1556 vtop
->type
.t
= VT_INT
;
1561 /* exactly one pointer : must be '+' or '-'. */
1562 if (op
!= '-' && op
!= '+')
1563 error("cannot use pointers here");
1564 /* Put pointer as first operand */
1565 if (bt2
== VT_PTR
) {
1569 type1
= vtop
[-1].type
;
1570 type1
.t
&= ~VT_ARRAY
;
1571 u
= pointed_size(&vtop
[-1].type
);
1573 error("unknown array element size");
1574 #ifdef TCC_TARGET_X86_64
1577 /* XXX: cast to int ? (long long case) */
1581 #ifdef CONFIG_TCC_BCHECK
1582 /* if evaluating constant expression, no code should be
1583 generated, so no bound check */
1584 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1585 /* if bounded pointers, we generate a special code to
1592 gen_bounded_ptr_add();
1598 /* put again type if gen_opic() swaped operands */
1601 } else if (is_float(bt1
) || is_float(bt2
)) {
1602 /* compute bigger type and do implicit casts */
1603 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1605 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1610 /* floats can only be used for a few operations */
1611 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1612 (op
< TOK_ULT
|| op
> TOK_GT
))
1613 error("invalid operands for binary operation");
1615 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1616 /* cast to biggest op */
1618 /* convert to unsigned if it does not fit in a long long */
1619 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1620 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1624 /* integer operations */
1626 /* convert to unsigned if it does not fit in an integer */
1627 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1628 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1631 /* XXX: currently, some unsigned operations are explicit, so
1632 we modify them here */
1633 if (t
& VT_UNSIGNED
) {
1640 else if (op
== TOK_LT
)
1642 else if (op
== TOK_GT
)
1644 else if (op
== TOK_LE
)
1646 else if (op
== TOK_GE
)
1653 /* special case for shifts and long long: we keep the shift as
1655 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1662 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1663 /* relationnal op: the result is an int */
1664 vtop
->type
.t
= VT_INT
;
1671 #ifndef TCC_TARGET_ARM
1672 /* generic itof for unsigned long long case */
1673 static void gen_cvt_itof1(int t
)
1675 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1676 (VT_LLONG
| VT_UNSIGNED
)) {
1679 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1680 #if LDOUBLE_SIZE != 8
1681 else if (t
== VT_LDOUBLE
)
1682 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1685 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1689 vtop
->r
= reg_fret(t
);
1696 /* generic ftoi for unsigned long long case */
1697 static void gen_cvt_ftoi1(int t
)
1701 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1702 /* not handled natively */
1703 st
= vtop
->type
.t
& VT_BTYPE
;
1705 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1706 #if LDOUBLE_SIZE != 8
1707 else if (st
== VT_LDOUBLE
)
1708 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1711 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1716 vtop
->r2
= REG_LRET
;
1722 /* force char or short cast */
1723 static void force_charshort_cast(int t
)
1727 /* XXX: add optimization if lvalue : just change type and offset */
1732 if (t
& VT_UNSIGNED
) {
1733 vpushi((1 << bits
) - 1);
1739 /* result must be signed or the SAR is converted to an SHL
1740 This was not the case when "t" was a signed short
1741 and the last value on the stack was an unsigned int */
1742 vtop
->type
.t
&= ~VT_UNSIGNED
;
1748 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1749 static void gen_cast(CType
*type
)
1751 int sbt
, dbt
, sf
, df
, c
, p
;
1753 /* special delayed cast for char/short */
1754 /* XXX: in some cases (multiple cascaded casts), it may still
1756 if (vtop
->r
& VT_MUSTCAST
) {
1757 vtop
->r
&= ~VT_MUSTCAST
;
1758 force_charshort_cast(vtop
->type
.t
);
1761 /* bitfields first get cast to ints */
1762 if (vtop
->type
.t
& VT_BITFIELD
) {
1766 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1767 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1772 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1773 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1775 /* constant case: we can do it now */
1776 /* XXX: in ISOC, cannot do it if error in convert */
1777 if (sbt
== VT_FLOAT
)
1778 vtop
->c
.ld
= vtop
->c
.f
;
1779 else if (sbt
== VT_DOUBLE
)
1780 vtop
->c
.ld
= vtop
->c
.d
;
1783 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1784 if (sbt
& VT_UNSIGNED
)
1785 vtop
->c
.ld
= vtop
->c
.ull
;
1787 vtop
->c
.ld
= vtop
->c
.ll
;
1789 if (sbt
& VT_UNSIGNED
)
1790 vtop
->c
.ld
= vtop
->c
.ui
;
1792 vtop
->c
.ld
= vtop
->c
.i
;
1795 if (dbt
== VT_FLOAT
)
1796 vtop
->c
.f
= (float)vtop
->c
.ld
;
1797 else if (dbt
== VT_DOUBLE
)
1798 vtop
->c
.d
= (double)vtop
->c
.ld
;
1799 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1800 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1801 } else if (sf
&& dbt
== VT_BOOL
) {
1802 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1805 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1806 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1807 vtop
->c
.ll
= vtop
->c
.ull
;
1808 else if (sbt
& VT_UNSIGNED
)
1809 vtop
->c
.ll
= vtop
->c
.ui
;
1810 #ifdef TCC_TARGET_X86_64
1811 else if (sbt
== VT_PTR
)
1814 else if (sbt
!= VT_LLONG
)
1815 vtop
->c
.ll
= vtop
->c
.i
;
1817 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1818 vtop
->c
.ull
= vtop
->c
.ll
;
1819 else if (dbt
== VT_BOOL
)
1820 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1821 else if (dbt
!= VT_LLONG
) {
1823 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1825 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1828 if(dbt
& VT_UNSIGNED
)
1829 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1831 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1834 } else if (p
&& dbt
== VT_BOOL
) {
1837 } else if (!nocode_wanted
) {
1838 /* non constant case: generate code */
1840 /* convert from fp to fp */
1843 /* convert int to fp */
1846 /* convert fp to int */
1847 if (dbt
== VT_BOOL
) {
1851 /* we handle char/short/etc... with generic code */
1852 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1853 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1857 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1858 /* additional cast for char/short... */
1863 #ifndef TCC_TARGET_X86_64
1864 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1865 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1866 /* scalar to long long */
1867 /* machine independent conversion */
1869 /* generate high word */
1870 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
1874 if (sbt
== VT_PTR
) {
1875 /* cast from pointer to int before we apply
1876 shift operation, which pointers don't support*/
1877 gen_cast(&int_type
);
1883 /* patch second register */
1884 vtop
[-1].r2
= vtop
->r
;
1888 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
1889 (dbt
& VT_BTYPE
) == VT_PTR
||
1890 (dbt
& VT_BTYPE
) == VT_FUNC
) {
1891 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
1892 (sbt
& VT_BTYPE
) != VT_PTR
&&
1893 (sbt
& VT_BTYPE
) != VT_FUNC
) {
1894 /* need to convert from 32bit to 64bit */
1896 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
1897 /* x86_64 specific: movslq */
1899 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
1903 } else if (dbt
== VT_BOOL
) {
1904 /* scalar to bool */
1907 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
1908 (dbt
& VT_BTYPE
) == VT_SHORT
) {
1909 if (sbt
== VT_PTR
) {
1910 vtop
->type
.t
= VT_INT
;
1911 warning("nonportable conversion from pointer to char/short");
1913 force_charshort_cast(dbt
);
1914 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
1916 if (sbt
== VT_LLONG
) {
1917 /* from long long: just take low order word */
1921 /* if lvalue and single word type, nothing to do because
1922 the lvalue already contains the real type size (see
1923 VT_LVAL_xxx constants) */
1926 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
1927 /* if we are casting between pointer types,
1928 we must update the VT_LVAL_xxx size */
1929 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
1930 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
1935 /* return type size. Put alignment at 'a' */
1936 ST_FUNC
int type_size(CType
*type
, int *a
)
1941 bt
= type
->t
& VT_BTYPE
;
1942 if (bt
== VT_STRUCT
) {
1947 } else if (bt
== VT_PTR
) {
1948 if (type
->t
& VT_ARRAY
) {
1952 ts
= type_size(&s
->type
, a
);
1954 if (ts
< 0 && s
->c
< 0)
1962 } else if (bt
== VT_LDOUBLE
) {
1964 return LDOUBLE_SIZE
;
1965 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
1966 #ifdef TCC_TARGET_I386
1967 #ifdef TCC_TARGET_PE
1972 #elif defined(TCC_TARGET_ARM)
1982 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
1985 } else if (bt
== VT_SHORT
) {
1989 /* char, void, function, _Bool */
1995 /* return the pointed type of t */
1996 static inline CType
*pointed_type(CType
*type
)
1998 return &type
->ref
->type
;
2001 /* modify type so that its it is a pointer to type. */
2002 ST_FUNC
void mk_pointer(CType
*type
)
2005 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2006 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2010 /* compare function types. OLD functions match any new functions */
2011 static int is_compatible_func(CType
*type1
, CType
*type2
)
2017 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2019 /* check func_call */
2020 if (FUNC_CALL(s1
->r
) != FUNC_CALL(s2
->r
))
2022 /* XXX: not complete */
2023 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2027 while (s1
!= NULL
) {
2030 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2040 /* return true if type1 and type2 are the same. If unqualified is
2041 true, qualifiers on the types are ignored.
2043 - enums are not checked as gcc __builtin_types_compatible_p ()
2045 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2049 t1
= type1
->t
& VT_TYPE
;
2050 t2
= type2
->t
& VT_TYPE
;
2052 /* strip qualifiers before comparing */
2053 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2054 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2056 /* XXX: bitfields ? */
2059 /* test more complicated cases */
2060 bt1
= t1
& VT_BTYPE
;
2061 if (bt1
== VT_PTR
) {
2062 type1
= pointed_type(type1
);
2063 type2
= pointed_type(type2
);
2064 return is_compatible_types(type1
, type2
);
2065 } else if (bt1
== VT_STRUCT
) {
2066 return (type1
->ref
== type2
->ref
);
2067 } else if (bt1
== VT_FUNC
) {
2068 return is_compatible_func(type1
, type2
);
2074 /* return true if type1 and type2 are exactly the same (including
2077 static int is_compatible_types(CType
*type1
, CType
*type2
)
2079 return compare_types(type1
,type2
,0);
2082 /* return true if type1 and type2 are the same (ignoring qualifiers).
2084 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2086 return compare_types(type1
,type2
,1);
2089 /* print a type. If 'varstr' is not NULL, then the variable is also
2090 printed in the type */
2092 /* XXX: add array and function pointers */
2093 static void type_to_str(char *buf
, int buf_size
,
2094 CType
*type
, const char *varstr
)
2101 t
= type
->t
& VT_TYPE
;
2104 if (t
& VT_CONSTANT
)
2105 pstrcat(buf
, buf_size
, "const ");
2106 if (t
& VT_VOLATILE
)
2107 pstrcat(buf
, buf_size
, "volatile ");
2108 if (t
& VT_UNSIGNED
)
2109 pstrcat(buf
, buf_size
, "unsigned ");
2139 tstr
= "long double";
2141 pstrcat(buf
, buf_size
, tstr
);
2145 if (bt
== VT_STRUCT
)
2149 pstrcat(buf
, buf_size
, tstr
);
2150 v
= type
->ref
->v
& ~SYM_STRUCT
;
2151 if (v
>= SYM_FIRST_ANOM
)
2152 pstrcat(buf
, buf_size
, "<anonymous>");
2154 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2158 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2159 pstrcat(buf
, buf_size
, "(");
2161 while (sa
!= NULL
) {
2162 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2163 pstrcat(buf
, buf_size
, buf1
);
2166 pstrcat(buf
, buf_size
, ", ");
2168 pstrcat(buf
, buf_size
, ")");
2172 pstrcpy(buf1
, sizeof(buf1
), "*");
2174 pstrcat(buf1
, sizeof(buf1
), varstr
);
2175 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2179 pstrcat(buf
, buf_size
, " ");
2180 pstrcat(buf
, buf_size
, varstr
);
2185 /* verify type compatibility to store vtop in 'dt' type, and generate
2187 static void gen_assign_cast(CType
*dt
)
2189 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2190 char buf1
[256], buf2
[256];
2193 st
= &vtop
->type
; /* source type */
2194 dbt
= dt
->t
& VT_BTYPE
;
2195 sbt
= st
->t
& VT_BTYPE
;
2196 if (dt
->t
& VT_CONSTANT
)
2197 warning("assignment of read-only location");
2200 /* special cases for pointers */
2201 /* '0' can also be a pointer */
2202 if (is_null_pointer(vtop
))
2204 /* accept implicit pointer to integer cast with warning */
2205 if (is_integer_btype(sbt
)) {
2206 warning("assignment makes pointer from integer without a cast");
2209 type1
= pointed_type(dt
);
2210 /* a function is implicitely a function pointer */
2211 if (sbt
== VT_FUNC
) {
2212 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2213 !is_compatible_types(pointed_type(dt
), st
))
2214 warning("assignment from incompatible pointer type");
2219 type2
= pointed_type(st
);
2220 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2221 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2222 /* void * can match anything */
2224 /* exact type match, except for unsigned */
2227 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2228 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2229 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2230 warning("assignment from incompatible pointer type");
2232 /* check const and volatile */
2233 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2234 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2235 warning("assignment discards qualifiers from pointer target type");
2241 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2242 warning("assignment makes integer from pointer without a cast");
2244 /* XXX: more tests */
2249 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2250 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2251 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2253 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2254 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2255 error("cannot cast '%s' to '%s'", buf1
, buf2
);
2263 /* store vtop in lvalue pushed on stack */
2264 ST_FUNC
void vstore(void)
2266 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2268 ft
= vtop
[-1].type
.t
;
2269 sbt
= vtop
->type
.t
& VT_BTYPE
;
2270 dbt
= ft
& VT_BTYPE
;
2271 if (((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2272 (sbt
== VT_INT
&& dbt
== VT_SHORT
)) {
2273 /* optimize char/short casts */
2274 delayed_cast
= VT_MUSTCAST
;
2275 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2276 /* XXX: factorize */
2277 if (ft
& VT_CONSTANT
)
2278 warning("assignment of read-only location");
2281 if (!(ft
& VT_BITFIELD
))
2282 gen_assign_cast(&vtop
[-1].type
);
2285 if (sbt
== VT_STRUCT
) {
2286 /* if structure, only generate pointer */
2287 /* structure assignment : generate memcpy */
2288 /* XXX: optimize if small size */
2289 if (!nocode_wanted
) {
2290 size
= type_size(&vtop
->type
, &align
);
2294 vtop
->type
.t
= VT_PTR
;
2297 /* address of memcpy() */
2300 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2301 else if(!(align
& 3))
2302 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2305 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2310 vtop
->type
.t
= VT_PTR
;
2319 /* leave source on stack */
2320 } else if (ft
& VT_BITFIELD
) {
2321 /* bitfield store handling */
2322 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2323 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2324 /* remove bit field info to avoid loops */
2325 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2327 /* duplicate source into other register */
2332 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2333 gen_cast(&vtop
[-1].type
);
2334 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2337 /* duplicate destination */
2339 vtop
[-1] = vtop
[-2];
2341 /* mask and shift source */
2342 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2343 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2344 vpushll((1ULL << bit_size
) - 1ULL);
2346 vpushi((1 << bit_size
) - 1);
2352 /* load destination, mask and or with source */
2354 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2355 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2357 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2364 /* pop off shifted source from "duplicate source..." above */
2368 #ifdef CONFIG_TCC_BCHECK
2369 /* bound check case */
2370 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2376 if (!nocode_wanted
) {
2380 #ifdef TCC_TARGET_X86_64
2381 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2386 r
= gv(rc
); /* generate value */
2387 /* if lvalue was saved on stack, must read it */
2388 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2390 t
= get_reg(RC_INT
);
2391 #ifdef TCC_TARGET_X86_64
2396 sv
.r
= VT_LOCAL
| VT_LVAL
;
2397 sv
.c
.ul
= vtop
[-1].c
.ul
;
2399 vtop
[-1].r
= t
| VT_LVAL
;
2402 #ifndef TCC_TARGET_X86_64
2403 /* two word case handling : store second register at word + 4 */
2404 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2406 /* convert to int to increment easily */
2407 vtop
->type
.t
= VT_INT
;
2413 /* XXX: it works because r2 is spilled last ! */
2414 store(vtop
->r2
, vtop
- 1);
2419 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2420 vtop
->r
|= delayed_cast
;
2424 /* post defines POST/PRE add. c is the token ++ or -- */
2425 ST_FUNC
void inc(int post
, int c
)
2428 vdup(); /* save lvalue */
2430 gv_dup(); /* duplicate value */
2435 vpushi(c
- TOK_MID
);
2437 vstore(); /* store value */
2439 vpop(); /* if post op, return saved value */
2442 /* Parse GNUC __attribute__ extension. Currently, the following
2443 extensions are recognized:
2444 - aligned(n) : set data/function alignment.
2445 - packed : force data alignment to 1
2446 - section(x) : generate data/code in this section.
2447 - unused : currently ignored, but may be used someday.
2448 - regparm(n) : pass function parameters in registers (i386 only)
2450 static void parse_attribute(AttributeDef
*ad
)
2454 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2458 while (tok
!= ')') {
2459 if (tok
< TOK_IDENT
)
2460 expect("attribute name");
2468 expect("section name");
2469 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2478 if (n
<= 0 || (n
& (n
- 1)) != 0)
2479 error("alignment must be a positive power of two");
2496 /* currently, no need to handle it because tcc does not
2497 track unused objects */
2501 /* currently, no need to handle it because tcc does not
2502 track unused objects */
2507 ad
->func_call
= FUNC_CDECL
;
2512 ad
->func_call
= FUNC_STDCALL
;
2514 #ifdef TCC_TARGET_I386
2524 ad
->func_call
= FUNC_FASTCALL1
+ n
- 1;
2530 ad
->func_call
= FUNC_FASTCALLW
;
2537 ad
->mode
= VT_LLONG
+ 1;
2540 ad
->mode
= VT_SHORT
+ 1;
2543 ad
->mode
= VT_INT
+ 1;
2546 warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2553 ad
->func_export
= 1;
2556 ad
->func_import
= 1;
2559 if (tcc_state
->warn_unsupported
)
2560 warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2561 /* skip parameters */
2563 int parenthesis
= 0;
2567 else if (tok
== ')')
2570 } while (parenthesis
&& tok
!= -1);
2583 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2584 static void struct_decl(CType
*type
, int u
)
2586 int a
, v
, size
, align
, maxalign
, c
, offset
;
2587 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2588 Sym
*s
, *ss
, *ass
, **ps
;
2592 a
= tok
; /* save decl type */
2597 /* struct already defined ? return it */
2599 expect("struct/union/enum name");
2603 error("invalid type");
2610 /* we put an undefined size for struct/union */
2611 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2612 s
->r
= 0; /* default alignment is zero as gcc */
2613 /* put struct/union/enum name in type */
2621 error("struct/union/enum already defined");
2622 /* cannot be empty */
2624 /* non empty enums are not allowed */
2625 if (a
== TOK_ENUM
) {
2629 expect("identifier");
2635 /* enum symbols have static storage */
2636 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2637 ss
->type
.t
|= VT_STATIC
;
2642 /* NOTE: we accept a trailing comma */
2653 while (tok
!= '}') {
2654 parse_btype(&btype
, &ad
);
2660 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2661 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2662 expect("identifier");
2663 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2664 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2665 error("invalid type for '%s'",
2666 get_tok_str(v
, NULL
));
2670 bit_size
= expr_const();
2671 /* XXX: handle v = 0 case for messages */
2673 error("negative width in bit-field '%s'",
2674 get_tok_str(v
, NULL
));
2675 if (v
&& bit_size
== 0)
2676 error("zero width for bit-field '%s'",
2677 get_tok_str(v
, NULL
));
2679 size
= type_size(&type1
, &align
);
2681 if (align
< ad
.aligned
)
2683 } else if (ad
.packed
) {
2685 } else if (*tcc_state
->pack_stack_ptr
) {
2686 if (align
> *tcc_state
->pack_stack_ptr
)
2687 align
= *tcc_state
->pack_stack_ptr
;
2690 if (bit_size
>= 0) {
2691 bt
= type1
.t
& VT_BTYPE
;
2698 error("bitfields must have scalar type");
2700 if (bit_size
> bsize
) {
2701 error("width of '%s' exceeds its type",
2702 get_tok_str(v
, NULL
));
2703 } else if (bit_size
== bsize
) {
2704 /* no need for bit fields */
2706 } else if (bit_size
== 0) {
2707 /* XXX: what to do if only padding in a
2709 /* zero size: means to pad */
2712 /* we do not have enough room ?
2713 did the type change?
2715 if ((bit_pos
+ bit_size
) > bsize
||
2716 bt
!= prevbt
|| a
== TOK_UNION
)
2719 /* XXX: handle LSB first */
2720 type1
.t
|= VT_BITFIELD
|
2721 (bit_pos
<< VT_STRUCT_SHIFT
) |
2722 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2723 bit_pos
+= bit_size
;
2729 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2730 /* add new memory data only if starting
2732 if (lbit_pos
== 0) {
2733 if (a
== TOK_STRUCT
) {
2734 c
= (c
+ align
- 1) & -align
;
2743 if (align
> maxalign
)
2747 printf("add field %s offset=%d",
2748 get_tok_str(v
, NULL
), offset
);
2749 if (type1
.t
& VT_BITFIELD
) {
2750 printf(" pos=%d size=%d",
2751 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2752 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2757 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2759 while ((ass
= ass
->next
) != NULL
) {
2760 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2765 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2769 if (tok
== ';' || tok
== TOK_EOF
)
2776 /* store size and alignment */
2777 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2783 /* return 0 if no type declaration. otherwise, return the basic type
2786 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2788 int t
, u
, type_found
, typespec_found
, typedef_found
;
2792 memset(ad
, 0, sizeof(AttributeDef
));
2800 /* currently, we really ignore extension */
2810 if ((t
& VT_BTYPE
) != 0)
2811 error("too many basic types");
2827 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
2828 #ifndef TCC_TARGET_PE
2829 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2831 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
2832 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2846 if ((t
& VT_BTYPE
) == VT_LONG
) {
2847 #ifdef TCC_TARGET_PE
2848 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
2850 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2858 struct_decl(&type1
, VT_ENUM
);
2861 type
->ref
= type1
.ref
;
2865 struct_decl(&type1
, VT_STRUCT
);
2868 /* type modifiers */
2921 /* GNUC attribute */
2922 case TOK_ATTRIBUTE1
:
2923 case TOK_ATTRIBUTE2
:
2924 parse_attribute(ad
);
2927 t
= (t
& ~VT_BTYPE
) | u
;
2935 parse_expr_type(&type1
);
2938 if (typespec_found
|| typedef_found
)
2941 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
2944 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
2945 type
->ref
= s
->type
.ref
;
2947 /* get attributes from typedef */
2948 if (0 == ad
->aligned
)
2949 ad
->aligned
= FUNC_ALIGN(s
->r
);
2950 if (0 == ad
->func_call
)
2951 ad
->func_call
= FUNC_CALL(s
->r
);
2952 ad
->packed
|= FUNC_PACKED(s
->r
);
2961 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
2962 error("signed and unsigned modifier");
2963 if (tcc_state
->char_is_unsigned
) {
2964 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
2969 /* long is never used as type */
2970 if ((t
& VT_BTYPE
) == VT_LONG
)
2971 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
2972 t
= (t
& ~VT_BTYPE
) | VT_INT
;
2974 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2980 /* convert a function parameter type (array to pointer and function to
2981 function pointer) */
2982 static inline void convert_parameter_type(CType
*pt
)
2984 /* remove const and volatile qualifiers (XXX: const could be used
2985 to indicate a const function parameter */
2986 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2987 /* array must be transformed to pointer according to ANSI C */
2989 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
2994 ST_FUNC
void parse_asm_str(CString
*astr
)
2997 /* read the string */
2999 expect("string constant");
3001 while (tok
== TOK_STR
) {
3002 /* XXX: add \0 handling too ? */
3003 cstr_cat(astr
, tokc
.cstr
->data
);
3006 cstr_ccat(astr
, '\0');
3009 /* Parse an asm label and return the label
3010 * Don't forget to free the CString in the caller! */
3011 static void asm_label_instr(CString
*astr
)
3014 parse_asm_str(astr
);
3017 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3021 static void post_type(CType
*type
, AttributeDef
*ad
)
3023 int n
, l
, t1
, arg_size
, align
;
3024 Sym
**plast
, *s
, *first
;
3029 TokenSym
*ts
= NULL
;
3031 /* function declaration */
3039 /* read param name and compute offset */
3040 if (l
!= FUNC_OLD
) {
3041 if (!parse_btype(&pt
, &ad1
)) {
3043 error("invalid type");
3050 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3052 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3053 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3054 error("parameter declared as void");
3055 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3060 expect("identifier");
3064 convert_parameter_type(&pt
);
3065 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3071 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3078 /* if no parameters, then old type prototype */
3082 t1
= type
->t
& VT_STORAGE
;
3083 /* NOTE: const is ignored in returned type as it has a special
3084 meaning in gcc / C++ */
3085 type
->t
&= ~(VT_STORAGE
| VT_CONSTANT
);
3086 if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
3089 asm_label_instr(&astr
);
3090 ts
= tok_alloc(astr
.data
, strlen(astr
.data
));
3093 post_type(type
, ad
);
3094 /* we push a anonymous symbol which will contain the function prototype */
3095 ad
->func_args
= arg_size
;
3096 s
= sym_push(SYM_FIELD
, type
, INT_ATTR(ad
), l
);
3100 type
->t
= t1
| VT_FUNC
;
3102 } else if (tok
== '[') {
3103 /* array definition */
3105 if (tok
== TOK_RESTRICT1
)
3111 error("invalid array size");
3114 /* parse next post type */
3115 t1
= type
->t
& VT_STORAGE
;
3116 type
->t
&= ~VT_STORAGE
;
3117 post_type(type
, ad
);
3119 /* we push a anonymous symbol which will contain the array
3121 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3122 type
->t
= t1
| VT_ARRAY
| VT_PTR
;
3127 /* Parse a type declaration (except basic type), and return the type
3128 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3129 expected. 'type' should contain the basic type. 'ad' is the
3130 attribute definition of the basic type. It can be modified by
3133 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3136 CType type1
, *type2
;
3139 while (tok
== '*') {
3147 qualifiers
|= VT_CONSTANT
;
3152 qualifiers
|= VT_VOLATILE
;
3160 type
->t
|= qualifiers
;
3163 /* XXX: clarify attribute handling */
3164 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3165 parse_attribute(ad
);
3167 /* recursive type */
3168 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3169 type1
.t
= 0; /* XXX: same as int */
3172 /* XXX: this is not correct to modify 'ad' at this point, but
3173 the syntax is not clear */
3174 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3175 parse_attribute(ad
);
3176 type_decl(&type1
, ad
, v
, td
);
3179 /* type identifier */
3180 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3184 if (!(td
& TYPE_ABSTRACT
))
3185 expect("identifier");
3189 post_type(type
, ad
);
3190 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3191 parse_attribute(ad
);
3194 /* append type at the end of type1 */
3207 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3208 ST_FUNC
int lvalue_type(int t
)
3213 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3215 else if (bt
== VT_SHORT
)
3219 if (t
& VT_UNSIGNED
)
3220 r
|= VT_LVAL_UNSIGNED
;
3224 /* indirection with full error checking and bound check */
3225 ST_FUNC
void indir(void)
3227 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3228 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3232 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3234 vtop
->type
= *pointed_type(&vtop
->type
);
3235 /* Arrays and functions are never lvalues */
3236 if (!(vtop
->type
.t
& VT_ARRAY
)
3237 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3238 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3239 /* if bound checking, the referenced pointer must be checked */
3240 #ifdef CONFIG_TCC_BCHECK
3241 if (tcc_state
->do_bounds_check
)
3242 vtop
->r
|= VT_MUSTBOUND
;
3247 /* pass a parameter to a function and do type checking and casting */
3248 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3253 func_type
= func
->c
;
3254 if (func_type
== FUNC_OLD
||
3255 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3256 /* default casting : only need to convert float to double */
3257 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3261 } else if (arg
== NULL
) {
3262 error("too many arguments to function");
3265 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3266 gen_assign_cast(&type
);
3270 /* parse an expression of the form '(type)' or '(expr)' and return its
3272 static void parse_expr_type(CType
*type
)
3278 if (parse_btype(type
, &ad
)) {
3279 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3286 static void parse_type(CType
*type
)
3291 if (!parse_btype(type
, &ad
)) {
3294 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3297 static void vpush_tokc(int t
)
3302 vsetc(&type
, VT_CONST
, &tokc
);
3305 ST_FUNC
void unary(void)
3307 int n
, t
, align
, size
, r
, sizeof_caller
;
3311 static int in_sizeof
= 0;
3313 sizeof_caller
= in_sizeof
;
3315 /* XXX: GCC 2.95.3 does not generate a table although it should be
3329 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3333 vpush_tokc(VT_LLONG
);
3337 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3341 vpush_tokc(VT_FLOAT
);
3345 vpush_tokc(VT_DOUBLE
);
3349 vpush_tokc(VT_LDOUBLE
);
3352 case TOK___FUNCTION__
:
3354 goto tok_identifier
;
3360 /* special function name identifier */
3361 len
= strlen(funcname
) + 1;
3362 /* generate char[len] type */
3367 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3368 ptr
= section_ptr_add(data_section
, len
);
3369 memcpy(ptr
, funcname
, len
);
3374 #ifdef TCC_TARGET_PE
3375 t
= VT_SHORT
| VT_UNSIGNED
;
3381 /* string parsing */
3384 if (tcc_state
->warn_write_strings
)
3389 memset(&ad
, 0, sizeof(AttributeDef
));
3390 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
3395 if (parse_btype(&type
, &ad
)) {
3396 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3398 /* check ISOC99 compound literal */
3400 /* data is allocated locally by default */
3405 /* all except arrays are lvalues */
3406 if (!(type
.t
& VT_ARRAY
))
3407 r
|= lvalue_type(type
.t
);
3408 memset(&ad
, 0, sizeof(AttributeDef
));
3409 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
3411 if (sizeof_caller
) {
3418 } else if (tok
== '{') {
3419 /* save all registers */
3421 /* statement expression : we do not accept break/continue
3422 inside as GCC does */
3423 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3438 /* functions names must be treated as function pointers,
3439 except for unary '&' and sizeof. Since we consider that
3440 functions are not lvalues, we only have to handle it
3441 there and in function calls. */
3442 /* arrays can also be used although they are not lvalues */
3443 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3444 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3446 mk_pointer(&vtop
->type
);
3452 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3454 boolean
.t
= VT_BOOL
;
3456 vtop
->c
.i
= !vtop
->c
.i
;
3457 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3458 vtop
->c
.i
= vtop
->c
.i
^ 1;
3461 vseti(VT_JMP
, gtst(1, 0));
3472 /* in order to force cast, we add zero */
3474 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3475 error("pointer not accepted for unary plus");
3485 unary_type(&type
); // Perform a in_sizeof = 0;
3486 size
= type_size(&type
, &align
);
3487 if (t
== TOK_SIZEOF
) {
3489 error("sizeof applied to an incomplete type");
3494 vtop
->type
.t
|= VT_UNSIGNED
;
3497 case TOK_builtin_types_compatible_p
:
3506 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3507 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3508 vpushi(is_compatible_types(&type1
, &type2
));
3511 case TOK_builtin_constant_p
:
3513 int saved_nocode_wanted
, res
;
3516 saved_nocode_wanted
= nocode_wanted
;
3519 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3521 nocode_wanted
= saved_nocode_wanted
;
3526 case TOK_builtin_frame_address
:
3531 if (tok
!= TOK_CINT
) {
3532 error("__builtin_frame_address only takes integers");
3535 error("TCC only supports __builtin_frame_address(0)");
3541 vset(&type
, VT_LOCAL
, 0);
3544 #ifdef TCC_TARGET_X86_64
3545 case TOK_builtin_malloc
:
3547 goto tok_identifier
;
3548 case TOK_builtin_free
:
3550 goto tok_identifier
;
3567 goto tok_identifier
;
3569 /* allow to take the address of a label */
3570 if (tok
< TOK_UIDENT
)
3571 expect("label identifier");
3572 s
= label_find(tok
);
3574 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3576 if (s
->r
== LABEL_DECLARED
)
3577 s
->r
= LABEL_FORWARD
;
3580 s
->type
.t
= VT_VOID
;
3581 mk_pointer(&s
->type
);
3582 s
->type
.t
|= VT_STATIC
;
3584 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3589 // special qnan , snan and infinity values
3591 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3595 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3599 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3608 expect("identifier");
3612 error("'%s' undeclared", get_tok_str(t
, NULL
));
3613 /* for simple function calls, we tolerate undeclared
3614 external reference to int() function */
3615 if (tcc_state
->warn_implicit_function_declaration
)
3616 warning("implicit declaration of function '%s'",
3617 get_tok_str(t
, NULL
));
3618 s
= external_global_sym(t
, &func_old_type
, 0);
3620 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3621 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3622 /* if referencing an inline function, then we generate a
3623 symbol to it if not already done. It will have the
3624 effect to generate code for it at the end of the
3625 compilation unit. Inline function as always
3626 generated in the text section. */
3628 put_extern_sym(s
, text_section
, 0, 0);
3629 r
= VT_SYM
| VT_CONST
;
3633 vset(&s
->type
, r
, s
->c
);
3634 /* if forward reference, we must point to s */
3635 if (vtop
->r
& VT_SYM
) {
3642 /* post operations */
3644 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3647 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3650 if (tok
== TOK_ARROW
)
3652 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3656 /* expect pointer on structure */
3657 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3658 expect("struct or union");
3662 while ((s
= s
->next
) != NULL
) {
3667 error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3668 /* add field offset to pointer */
3669 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3672 /* change type to field type, and set to lvalue */
3673 vtop
->type
= s
->type
;
3674 vtop
->type
.t
|= qualifiers
;
3675 /* an array is never an lvalue */
3676 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3677 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3678 #ifdef CONFIG_TCC_BCHECK
3679 /* if bound checking, the referenced pointer must be checked */
3680 if (tcc_state
->do_bounds_check
)
3681 vtop
->r
|= VT_MUSTBOUND
;
3685 } else if (tok
== '[') {
3691 } else if (tok
== '(') {
3697 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3698 /* pointer test (no array accepted) */
3699 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3700 vtop
->type
= *pointed_type(&vtop
->type
);
3701 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3705 expect("function pointer");
3708 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3710 /* get return type */
3713 sa
= s
->next
; /* first parameter */
3716 /* compute first implicit argument if a structure is returned */
3717 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3718 /* get some space for the returned structure */
3719 size
= type_size(&s
->type
, &align
);
3720 loc
= (loc
- size
) & -align
;
3722 ret
.r
= VT_LOCAL
| VT_LVAL
;
3723 /* pass it as 'int' to avoid structure arg passing
3725 vseti(VT_LOCAL
, loc
);
3730 /* return in register */
3731 if (is_float(ret
.type
.t
)) {
3732 ret
.r
= reg_fret(ret
.type
.t
);
3734 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
3743 gfunc_param_typed(s
, sa
);
3753 error("too few arguments to function");
3755 if (!nocode_wanted
) {
3756 gfunc_call(nb_args
);
3758 vtop
-= (nb_args
+ 1);
3761 vsetc(&ret
.type
, ret
.r
, &ret
.c
);
3769 ST_FUNC
void expr_prod(void)
3774 while (tok
== '*' || tok
== '/' || tok
== '%') {
3782 ST_FUNC
void expr_sum(void)
3787 while (tok
== '+' || tok
== '-') {
3795 static void expr_shift(void)
3800 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
3808 static void expr_cmp(void)
3813 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
3814 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
3822 static void expr_cmpeq(void)
3827 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
3835 static void expr_and(void)
3838 while (tok
== '&') {
3845 static void expr_xor(void)
3848 while (tok
== '^') {
3855 static void expr_or(void)
3858 while (tok
== '|') {
3865 /* XXX: fix this mess */
3866 static void expr_land_const(void)
3869 while (tok
== TOK_LAND
) {
3876 /* XXX: fix this mess */
3877 static void expr_lor_const(void)
3880 while (tok
== TOK_LOR
) {
3887 /* only used if non constant */
3888 static void expr_land(void)
3893 if (tok
== TOK_LAND
) {
3898 if (tok
!= TOK_LAND
) {
3908 static void expr_lor(void)
3913 if (tok
== TOK_LOR
) {
3918 if (tok
!= TOK_LOR
) {
3928 /* XXX: better constant handling */
3929 static void expr_cond(void)
3931 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
3933 CType type
, type1
, type2
;
3940 boolean
.t
= VT_BOOL
;
3946 if (tok
!= ':' || !gnu_ext
) {
3961 if (vtop
!= vstack
) {
3962 /* needed to avoid having different registers saved in
3964 if (is_float(vtop
->type
.t
)) {
3966 #ifdef TCC_TARGET_X86_64
3967 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
3977 if (tok
== ':' && gnu_ext
) {
3985 sv
= *vtop
; /* save value to handle it later */
3986 vtop
--; /* no vpop so that FP stack is not flushed */
3994 bt1
= t1
& VT_BTYPE
;
3996 bt2
= t2
& VT_BTYPE
;
3997 /* cast operands to correct type according to ISOC rules */
3998 if (is_float(bt1
) || is_float(bt2
)) {
3999 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4000 type
.t
= VT_LDOUBLE
;
4001 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4006 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4007 /* cast to biggest op */
4009 /* convert to unsigned if it does not fit in a long long */
4010 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4011 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4012 type
.t
|= VT_UNSIGNED
;
4013 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4014 /* XXX: test pointer compatibility */
4016 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4017 /* XXX: test function pointer compatibility */
4019 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4020 /* XXX: test structure compatibility */
4022 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4023 /* NOTE: as an extension, we accept void on only one side */
4026 /* integer operations */
4028 /* convert to unsigned if it does not fit in an integer */
4029 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4030 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4031 type
.t
|= VT_UNSIGNED
;
4034 /* now we convert second operand */
4036 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4039 if (is_float(type
.t
)) {
4041 #ifdef TCC_TARGET_X86_64
4042 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4046 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4047 /* for long longs, we use fixed registers to avoid having
4048 to handle a complicated move */
4053 /* this is horrible, but we must also convert first
4057 /* put again first value and cast it */
4060 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4070 static void expr_eq(void)
4076 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4077 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4078 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4093 ST_FUNC
void gexpr(void)
4104 /* parse an expression and return its type without any side effect. */
4105 static void expr_type(CType
*type
)
4107 int saved_nocode_wanted
;
4109 saved_nocode_wanted
= nocode_wanted
;
4114 nocode_wanted
= saved_nocode_wanted
;
4117 /* parse a unary expression and return its type without any side
4119 static void unary_type(CType
*type
)
4131 /* parse a constant expression and return value in vtop. */
4132 static void expr_const1(void)
4141 /* parse an integer constant and return its value. */
4142 ST_FUNC
int expr_const(void)
4146 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4147 expect("constant expression");
4153 /* return the label token if current token is a label, otherwise
4155 static int is_label(void)
4159 /* fast test first */
4160 if (tok
< TOK_UIDENT
)
4162 /* no need to save tokc because tok is an identifier */
4169 unget_tok(last_tok
);
4174 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4175 int case_reg
, int is_expr
)
4180 /* generate line number info */
4181 if (tcc_state
->do_debug
&&
4182 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4183 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4185 last_line_num
= file
->line_num
;
4189 /* default return value is (void) */
4191 vtop
->type
.t
= VT_VOID
;
4194 if (tok
== TOK_IF
) {
4201 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4203 if (c
== TOK_ELSE
) {
4207 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4208 gsym(d
); /* patch else jmp */
4211 } else if (tok
== TOK_WHILE
) {
4219 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4223 } else if (tok
== '{') {
4227 /* record local declaration stack position */
4229 llabel
= local_label_stack
;
4230 /* handle local labels declarations */
4231 if (tok
== TOK_LABEL
) {
4234 if (tok
< TOK_UIDENT
)
4235 expect("label identifier");
4236 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4246 while (tok
!= '}') {
4251 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4254 /* pop locally defined labels */
4255 label_pop(&local_label_stack
, llabel
);
4256 /* pop locally defined symbols */
4258 /* XXX: this solution makes only valgrind happy...
4259 triggered by gcc.c-torture/execute/20000917-1.c */
4261 switch(vtop
->type
.t
& VT_BTYPE
) {
4266 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4268 error("unsupported expression type");
4271 sym_pop(&local_stack
, s
);
4273 } else if (tok
== TOK_RETURN
) {
4277 gen_assign_cast(&func_vt
);
4278 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4280 /* if returning structure, must copy it to implicit
4281 first pointer arg location */
4284 size
= type_size(&func_vt
,&align
);
4287 if((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& 3))
4291 loc
= (loc
- size
) & -4;
4294 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4297 vset(&int_type
, VT_LOCAL
| VT_LVAL
, addr
);
4299 vtop
->type
= int_type
;
4305 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4308 /* copy structure value to pointer */
4313 } else if (is_float(func_vt
.t
)) {
4314 gv(rc_fret(func_vt
.t
));
4318 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4321 rsym
= gjmp(rsym
); /* jmp */
4322 } else if (tok
== TOK_BREAK
) {
4325 error("cannot break");
4326 *bsym
= gjmp(*bsym
);
4329 } else if (tok
== TOK_CONTINUE
) {
4332 error("cannot continue");
4333 *csym
= gjmp(*csym
);
4336 } else if (tok
== TOK_FOR
) {
4363 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4368 if (tok
== TOK_DO
) {
4373 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4384 if (tok
== TOK_SWITCH
) {
4388 /* XXX: other types than integer */
4389 case_reg
= gv(RC_INT
);
4393 b
= gjmp(0); /* jump to first case */
4395 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4396 /* if no default, jmp after switch */
4404 if (tok
== TOK_CASE
) {
4411 if (gnu_ext
&& tok
== TOK_DOTS
) {
4415 warning("empty case range");
4417 /* since a case is like a label, we must skip it with a jmp */
4424 *case_sym
= gtst(1, 0);
4427 *case_sym
= gtst(1, 0);
4431 *case_sym
= gtst(1, *case_sym
);
4436 goto block_after_label
;
4438 if (tok
== TOK_DEFAULT
) {
4444 error("too many 'default'");
4447 goto block_after_label
;
4449 if (tok
== TOK_GOTO
) {
4451 if (tok
== '*' && gnu_ext
) {
4455 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4458 } else if (tok
>= TOK_UIDENT
) {
4459 s
= label_find(tok
);
4460 /* put forward definition if needed */
4462 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4464 if (s
->r
== LABEL_DECLARED
)
4465 s
->r
= LABEL_FORWARD
;
4467 /* label already defined */
4468 if (s
->r
& LABEL_FORWARD
)
4469 s
->jnext
= gjmp(s
->jnext
);
4471 gjmp_addr(s
->jnext
);
4474 expect("label identifier");
4477 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4485 if (s
->r
== LABEL_DEFINED
)
4486 error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4488 s
->r
= LABEL_DEFINED
;
4490 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4493 /* we accept this, but it is a mistake */
4496 warning("deprecated use of label at end of compound statement");
4500 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4503 /* expression case */
4518 /* t is the array or struct type. c is the array or struct
4519 address. cur_index/cur_field is the pointer to the current
4520 value. 'size_only' is true if only size info is needed (only used
4522 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4523 int *cur_index
, Sym
**cur_field
,
4527 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4533 if (gnu_ext
&& (l
= is_label()) != 0)
4535 while (tok
== '[' || tok
== '.') {
4537 if (!(type
->t
& VT_ARRAY
))
4538 expect("array type");
4541 index
= expr_const();
4542 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4543 expect("invalid index");
4544 if (tok
== TOK_DOTS
&& gnu_ext
) {
4546 index_last
= expr_const();
4547 if (index_last
< 0 ||
4548 (s
->c
>= 0 && index_last
>= s
->c
) ||
4550 expect("invalid index");
4556 *cur_index
= index_last
;
4557 type
= pointed_type(type
);
4558 elem_size
= type_size(type
, &align
);
4559 c
+= index
* elem_size
;
4560 /* NOTE: we only support ranges for last designator */
4561 nb_elems
= index_last
- index
+ 1;
4562 if (nb_elems
!= 1) {
4571 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4572 expect("struct/union type");
4585 /* XXX: fix this mess by using explicit storage field */
4587 type1
.t
|= (type
->t
& ~VT_TYPE
);
4601 if (type
->t
& VT_ARRAY
) {
4603 type
= pointed_type(type
);
4604 c
+= index
* type_size(type
, &align
);
4608 error("too many field init");
4609 /* XXX: fix this mess by using explicit storage field */
4611 type1
.t
|= (type
->t
& ~VT_TYPE
);
4616 decl_initializer(type
, sec
, c
, 0, size_only
);
4618 /* XXX: make it more general */
4619 if (!size_only
&& nb_elems
> 1) {
4620 unsigned long c_end
;
4625 error("range init not supported yet for dynamic storage");
4626 c_end
= c
+ nb_elems
* elem_size
;
4627 if (c_end
> sec
->data_allocated
)
4628 section_realloc(sec
, c_end
);
4629 src
= sec
->data
+ c
;
4631 for(i
= 1; i
< nb_elems
; i
++) {
4633 memcpy(dst
, src
, elem_size
);
4639 #define EXPR_CONST 1
4642 /* store a value or an expression directly in global data or in local array */
4643 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
4644 int v
, int expr_type
)
4646 int saved_global_expr
, bt
, bit_pos
, bit_size
;
4648 unsigned long long bit_mask
;
4656 /* compound literals must be allocated globally in this case */
4657 saved_global_expr
= global_expr
;
4660 global_expr
= saved_global_expr
;
4661 /* NOTE: symbols are accepted */
4662 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
4663 error("initializer element is not constant");
4671 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
4674 /* XXX: not portable */
4675 /* XXX: generate error if incorrect relocation */
4676 gen_assign_cast(&dtype
);
4677 bt
= type
->t
& VT_BTYPE
;
4678 /* we'll write at most 12 bytes */
4679 if (c
+ 12 > sec
->data_allocated
) {
4680 section_realloc(sec
, c
+ 12);
4682 ptr
= sec
->data
+ c
;
4683 /* XXX: make code faster ? */
4684 if (!(type
->t
& VT_BITFIELD
)) {
4689 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4690 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
4691 bit_mask
= (1LL << bit_size
) - 1;
4693 if ((vtop
->r
& VT_SYM
) &&
4699 (bt
== VT_INT
&& bit_size
!= 32)))
4700 error("initializer element is not computable at load time");
4703 vtop
->c
.i
= (vtop
->c
.i
!= 0);
4705 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4708 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4711 *(double *)ptr
= vtop
->c
.d
;
4714 *(long double *)ptr
= vtop
->c
.ld
;
4717 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
4720 if (vtop
->r
& VT_SYM
) {
4721 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
4723 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4728 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
4735 /* put zeros for variable based init */
4736 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
4739 /* nothing to do because globals are already set to zero */
4741 vpush_global_sym(&func_old_type
, TOK_memset
);
4749 /* 't' contains the type and storage info. 'c' is the offset of the
4750 object in section 'sec'. If 'sec' is NULL, it means stack based
4751 allocation. 'first' is true if array '{' must be read (multi
4752 dimension implicit array init handling). 'size_only' is true if
4753 size only evaluation is wanted (only for arrays). */
4754 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
4755 int first
, int size_only
)
4757 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, i
;
4758 int size1
, align1
, expr_type
;
4762 if (type
->t
& VT_ARRAY
) {
4766 t1
= pointed_type(type
);
4767 size1
= type_size(t1
, &align1
);
4770 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
4773 error("character array initializer must be a literal,"
4774 " optionally enclosed in braces");
4779 /* only parse strings here if correct type (otherwise: handle
4780 them as ((w)char *) expressions */
4781 if ((tok
== TOK_LSTR
&&
4782 #ifdef TCC_TARGET_PE
4783 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
4785 (t1
->t
& VT_BTYPE
) == VT_INT
4787 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
4788 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
4793 /* compute maximum number of chars wanted */
4795 cstr_len
= cstr
->size
;
4797 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
4800 if (n
>= 0 && nb
> (n
- array_length
))
4801 nb
= n
- array_length
;
4804 warning("initializer-string for array is too long");
4805 /* in order to go faster for common case (char
4806 string in global variable, we handle it
4808 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
4809 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
4813 ch
= ((unsigned char *)cstr
->data
)[i
];
4815 ch
= ((nwchar_t
*)cstr
->data
)[i
];
4816 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
4824 /* only add trailing zero if enough storage (no
4825 warning in this case since it is standard) */
4826 if (n
< 0 || array_length
< n
) {
4828 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
4834 while (tok
!= '}') {
4835 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
4836 if (n
>= 0 && index
>= n
)
4837 error("index too large");
4838 /* must put zero in holes (note that doing it that way
4839 ensures that it even works with designators) */
4840 if (!size_only
&& array_length
< index
) {
4841 init_putz(t1
, sec
, c
+ array_length
* size1
,
4842 (index
- array_length
) * size1
);
4845 if (index
> array_length
)
4846 array_length
= index
;
4847 /* special test for multi dimensional arrays (may not
4848 be strictly correct if designators are used at the
4850 if (index
>= n
&& no_oblock
)
4859 /* put zeros at the end */
4860 if (!size_only
&& n
>= 0 && array_length
< n
) {
4861 init_putz(t1
, sec
, c
+ array_length
* size1
,
4862 (n
- array_length
) * size1
);
4864 /* patch type size if needed */
4866 s
->c
= array_length
;
4867 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
4868 (sec
|| !first
|| tok
== '{')) {
4871 /* NOTE: the previous test is a specific case for automatic
4872 struct/union init */
4873 /* XXX: union needs only one init */
4875 /* XXX: this test is incorrect for local initializers
4876 beginning with ( without {. It would be much more difficult
4877 to do it correctly (ideally, the expression parser should
4878 be used in all cases) */
4884 while (tok
== '(') {
4888 if (!parse_btype(&type1
, &ad1
))
4890 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
4892 if (!is_assignable_types(type
, &type1
))
4893 error("invalid type for cast");
4898 if (first
|| tok
== '{') {
4907 while (tok
!= '}') {
4908 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
4910 if (!size_only
&& array_length
< index
) {
4911 init_putz(type
, sec
, c
+ array_length
,
4912 index
- array_length
);
4914 index
= index
+ type_size(&f
->type
, &align1
);
4915 if (index
> array_length
)
4916 array_length
= index
;
4918 /* gr: skip fields from same union - ugly. */
4920 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
4921 /* test for same offset */
4922 if (f
->next
->c
!= f
->c
)
4924 /* if yes, test for bitfield shift */
4925 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
4926 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4927 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4928 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
4929 if (bit_pos_1
!= bit_pos_2
)
4936 if (no_oblock
&& f
== NULL
)
4942 /* put zeros at the end */
4943 if (!size_only
&& array_length
< n
) {
4944 init_putz(type
, sec
, c
+ array_length
,
4953 } else if (tok
== '{') {
4955 decl_initializer(type
, sec
, c
, first
, size_only
);
4957 } else if (size_only
) {
4958 /* just skip expression */
4960 while ((parlevel
> 0 || (tok
!= '}' && tok
!= ',')) &&
4964 else if (tok
== ')')
4969 /* currently, we always use constant expression for globals
4970 (may change for scripting case) */
4971 expr_type
= EXPR_CONST
;
4973 expr_type
= EXPR_ANY
;
4974 init_putv(type
, sec
, c
, 0, expr_type
);
4978 /* parse an initializer for type 't' if 'has_init' is non zero, and
4979 allocate space in local or global data space ('r' is either
4980 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
4981 variable 'v' of scope 'scope' is declared before initializers are
4982 parsed. If 'v' is zero, then a reference to the new object is put
4983 in the value stack. If 'has_init' is 2, a special parsing is done
4984 to handle string constants. */
4985 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
4986 int has_init
, int v
, int scope
)
4988 int size
, align
, addr
, data_offset
;
4990 ParseState saved_parse_state
= {0};
4991 TokenString init_str
;
4994 size
= type_size(type
, &align
);
4995 /* If unknown size, we must evaluate it before
4996 evaluating initializers because
4997 initializers can generate global data too
4998 (e.g. string pointers or ISOC99 compound
4999 literals). It also simplifies local
5000 initializers handling */
5001 tok_str_new(&init_str
);
5004 error("unknown type size");
5005 /* get all init string */
5006 if (has_init
== 2) {
5007 /* only get strings */
5008 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5009 tok_str_add_tok(&init_str
);
5014 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5016 error("unexpected end of file in initializer");
5017 tok_str_add_tok(&init_str
);
5020 else if (tok
== '}') {
5030 tok_str_add(&init_str
, -1);
5031 tok_str_add(&init_str
, 0);
5034 save_parse_state(&saved_parse_state
);
5036 macro_ptr
= init_str
.str
;
5038 decl_initializer(type
, NULL
, 0, 1, 1);
5039 /* prepare second initializer parsing */
5040 macro_ptr
= init_str
.str
;
5043 /* if still unknown size, error */
5044 size
= type_size(type
, &align
);
5046 error("unknown type size");
5048 /* take into account specified alignment if bigger */
5050 if (ad
->aligned
> align
)
5051 align
= ad
->aligned
;
5052 } else if (ad
->packed
) {
5055 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5057 #ifdef CONFIG_TCC_BCHECK
5058 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
))
5061 loc
= (loc
- size
) & -align
;
5063 #ifdef CONFIG_TCC_BCHECK
5064 /* handles bounds */
5065 /* XXX: currently, since we do only one pass, we cannot track
5066 '&' operators, so we add only arrays */
5067 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5068 unsigned long *bounds_ptr
;
5069 /* add padding between regions */
5071 /* then add local bound info */
5072 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5073 bounds_ptr
[0] = addr
;
5074 bounds_ptr
[1] = size
;
5078 /* local variable */
5079 sym_push(v
, type
, r
, addr
);
5081 /* push local reference */
5082 vset(type
, r
, addr
);
5088 if (v
&& scope
== VT_CONST
) {
5089 /* see if the symbol was already defined */
5092 if (!is_compatible_types(&sym
->type
, type
))
5093 error("incompatible types for redefinition of '%s'",
5094 get_tok_str(v
, NULL
));
5095 if (sym
->type
.t
& VT_EXTERN
) {
5096 /* if the variable is extern, it was not allocated */
5097 sym
->type
.t
&= ~VT_EXTERN
;
5098 /* set array size if it was ommited in extern
5100 if ((sym
->type
.t
& VT_ARRAY
) &&
5101 sym
->type
.ref
->c
< 0 &&
5103 sym
->type
.ref
->c
= type
->ref
->c
;
5105 /* we accept several definitions of the same
5106 global variable. this is tricky, because we
5107 must play with the SHN_COMMON type of the symbol */
5108 /* XXX: should check if the variable was already
5109 initialized. It is incorrect to initialized it
5111 /* no init data, we won't add more to the symbol */
5118 /* allocate symbol in corresponding section */
5123 else if (tcc_state
->nocommon
)
5127 data_offset
= sec
->data_offset
;
5128 data_offset
= (data_offset
+ align
- 1) & -align
;
5130 /* very important to increment global pointer at this time
5131 because initializers themselves can create new initializers */
5132 data_offset
+= size
;
5133 #ifdef CONFIG_TCC_BCHECK
5134 /* add padding if bound check */
5135 if (tcc_state
->do_bounds_check
)
5138 sec
->data_offset
= data_offset
;
5139 /* allocate section space to put the data */
5140 if (sec
->sh_type
!= SHT_NOBITS
&&
5141 data_offset
> sec
->data_allocated
)
5142 section_realloc(sec
, data_offset
);
5143 /* align section if needed */
5144 if (align
> sec
->sh_addralign
)
5145 sec
->sh_addralign
= align
;
5147 addr
= 0; /* avoid warning */
5151 if (scope
!= VT_CONST
|| !sym
) {
5152 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5154 /* update symbol definition */
5156 put_extern_sym(sym
, sec
, addr
, size
);
5159 /* put a common area */
5160 put_extern_sym(sym
, NULL
, align
, size
);
5161 /* XXX: find a nicer way */
5162 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5163 esym
->st_shndx
= SHN_COMMON
;
5168 /* push global reference */
5169 sym
= get_sym_ref(type
, sec
, addr
, size
);
5171 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5174 #ifdef CONFIG_TCC_BCHECK
5175 /* handles bounds now because the symbol must be defined
5176 before for the relocation */
5177 if (tcc_state
->do_bounds_check
) {
5178 unsigned long *bounds_ptr
;
5180 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5181 /* then add global bound info */
5182 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5183 bounds_ptr
[0] = 0; /* relocated */
5184 bounds_ptr
[1] = size
;
5189 decl_initializer(type
, sec
, addr
, 1, 0);
5190 /* restore parse state if needed */
5192 tok_str_free(init_str
.str
);
5193 restore_parse_state(&saved_parse_state
);
5199 static void put_func_debug(Sym
*sym
)
5204 /* XXX: we put here a dummy type */
5205 snprintf(buf
, sizeof(buf
), "%s:%c1",
5206 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5207 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5208 cur_text_section
, sym
->c
);
5209 /* //gr gdb wants a line at the function */
5210 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5215 /* parse an old style function declaration list */
5216 /* XXX: check multiple parameter */
5217 static void func_decl_list(Sym
*func_sym
)
5224 /* parse each declaration */
5225 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
) {
5226 if (!parse_btype(&btype
, &ad
))
5227 expect("declaration list");
5228 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5229 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5231 /* we accept no variable after */
5235 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5236 /* find parameter in function parameter list */
5239 if ((s
->v
& ~SYM_FIELD
) == v
)
5243 error("declaration for parameter '%s' but no such parameter",
5244 get_tok_str(v
, NULL
));
5246 /* check that no storage specifier except 'register' was given */
5247 if (type
.t
& VT_STORAGE
)
5248 error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5249 convert_parameter_type(&type
);
5250 /* we can add the type (NOTE: it could be local to the function) */
5252 /* accept other parameters */
5263 /* parse a function defined by symbol 'sym' and generate its code in
5264 'cur_text_section' */
5265 static void gen_function(Sym
*sym
)
5267 int saved_nocode_wanted
= nocode_wanted
;
5269 ind
= cur_text_section
->data_offset
;
5270 /* NOTE: we patch the symbol size later */
5271 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5273 funcname
= get_tok_str(sym
->a
, NULL
);
5275 funcname
= get_tok_str(sym
->v
, NULL
);
5277 /* put debug symbol */
5278 if (tcc_state
->do_debug
)
5279 put_func_debug(sym
);
5280 /* push a dummy symbol to enable local sym storage */
5281 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5282 gfunc_prolog(&sym
->type
);
5284 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5287 cur_text_section
->data_offset
= ind
;
5288 label_pop(&global_label_stack
, NULL
);
5289 sym_pop(&local_stack
, NULL
); /* reset local stack */
5290 /* end of function */
5291 /* patch symbol size */
5292 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5294 if (tcc_state
->do_debug
) {
5295 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5297 /* It's better to crash than to generate wrong code */
5298 cur_text_section
= NULL
;
5299 funcname
= ""; /* for safety */
5300 func_vt
.t
= VT_VOID
; /* for safety */
5301 ind
= 0; /* for safety */
5302 nocode_wanted
= saved_nocode_wanted
;
5305 ST_FUNC
void gen_inline_functions(void)
5308 int *str
, inline_generated
, i
;
5309 struct InlineFunc
*fn
;
5311 /* iterate while inline function are referenced */
5313 inline_generated
= 0;
5314 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5315 fn
= tcc_state
->inline_fns
[i
];
5317 if (sym
&& sym
->c
) {
5318 /* the function was used: generate its code and
5319 convert it to a normal function */
5320 str
= fn
->token_str
;
5323 strcpy(file
->filename
, fn
->filename
);
5324 sym
->r
= VT_SYM
| VT_CONST
;
5325 sym
->type
.t
&= ~VT_INLINE
;
5329 cur_text_section
= text_section
;
5331 macro_ptr
= NULL
; /* fail safe */
5333 inline_generated
= 1;
5336 if (!inline_generated
)
5339 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5340 fn
= tcc_state
->inline_fns
[i
];
5341 str
= fn
->token_str
;
5344 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5347 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5348 ST_FUNC
void decl(int l
)
5356 * type.ref must be either a valid reference or NULL for external_sym to
5357 * work. As type = btype is executed before external_sym is call, setting
5358 * btype.ref to 0 is enough.
5362 if (!parse_btype(&btype
, &ad
)) {
5363 /* skip redundant ';' */
5364 /* XXX: find more elegant solution */
5369 if (l
== VT_CONST
&&
5370 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5371 /* global asm block */
5375 /* special test for old K&R protos without explicit int
5376 type. Only accepted when defining global data */
5377 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5381 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5382 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5384 /* we accept no variable after */
5388 while (1) { /* iterate thru each declaration */
5390 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5394 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5395 printf("type = '%s'\n", buf
);
5398 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5399 /* if old style function prototype, we accept a
5402 if (sym
->c
== FUNC_OLD
)
5403 func_decl_list(sym
);
5406 #ifdef TCC_TARGET_PE
5408 type
.t
|= VT_IMPORT
;
5410 type
.t
|= VT_EXPORT
;
5414 error("cannot use local functions");
5415 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5416 expect("function definition");
5418 /* reject abstract declarators in function definition */
5420 while ((sym
= sym
->next
) != NULL
)
5421 if (!(sym
->v
& ~SYM_FIELD
))
5422 expect("identifier");
5424 /* XXX: cannot do better now: convert extern line to static inline */
5425 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5426 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5430 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5433 r
= sym
->type
.ref
->r
;
5434 /* use func_call from prototype if not defined */
5435 if (FUNC_CALL(r
) != FUNC_CDECL
5436 && FUNC_CALL(type
.ref
->r
) == FUNC_CDECL
)
5437 FUNC_CALL(type
.ref
->r
) = FUNC_CALL(r
);
5439 /* use export from prototype */
5441 FUNC_EXPORT(type
.ref
->r
) = 1;
5443 /* use static from prototype */
5444 if (sym
->type
.t
& VT_STATIC
)
5445 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5447 if (!is_compatible_types(&sym
->type
, &type
)) {
5449 error("incompatible types for redefinition of '%s'",
5450 get_tok_str(v
, NULL
));
5452 /* if symbol is already defined, then put complete type */
5455 /* put function symbol */
5456 sym
= global_identifier_push(v
, type
.t
, 0);
5457 sym
->type
.ref
= type
.ref
;
5460 /* static inline functions are just recorded as a kind
5461 of macro. Their code will be emitted at the end of
5462 the compilation unit only if they are used */
5463 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5464 (VT_INLINE
| VT_STATIC
)) {
5465 TokenString func_str
;
5467 struct InlineFunc
*fn
;
5468 const char *filename
;
5470 tok_str_new(&func_str
);
5476 error("unexpected end of file");
5477 tok_str_add_tok(&func_str
);
5482 } else if (t
== '}') {
5484 if (block_level
== 0)
5488 tok_str_add(&func_str
, -1);
5489 tok_str_add(&func_str
, 0);
5490 filename
= file
? file
->filename
: "";
5491 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5492 strcpy(fn
->filename
, filename
);
5494 fn
->token_str
= func_str
.str
;
5495 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5498 /* compute text section */
5499 cur_text_section
= ad
.section
;
5500 if (!cur_text_section
)
5501 cur_text_section
= text_section
;
5502 sym
->r
= VT_SYM
| VT_CONST
;
5507 if (btype
.t
& VT_TYPEDEF
) {
5508 /* save typedefed type */
5509 /* XXX: test storage specifiers ? */
5510 sym
= sym_push(v
, &type
, INT_ATTR(&ad
), 0);
5511 sym
->type
.t
|= VT_TYPEDEF
;
5512 } else if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5514 /* external function definition */
5515 /* specific case for func_call attribute */
5516 type
.ref
->r
= INT_ATTR(&ad
);
5517 fn
= external_sym(v
, &type
, 0);
5519 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5525 /* Part 1: __USER_LABEL_PREFIX__ (user defined) */
5527 pstrcat(target
, sizeof(target
), tokc
.cstr
->data
);
5529 pstrcat(target
, sizeof(target
), get_tok_str(tok
, NULL
));
5532 /* Part 2: api name */
5534 pstrcat(target
, sizeof(target
), tokc
.cstr
->data
);
5536 pstrcat(target
, sizeof(target
), get_tok_str(tok
, NULL
));
5540 if (tcc_state
->warn_unsupported
)
5541 warning("ignoring redirection from %s to %s\n", get_tok_str(v
, NULL
), target
);
5543 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
5544 parse_attribute((AttributeDef
*) &fn
->type
.ref
->r
);
5547 /* not lvalue if array */
5549 if (!(type
.t
& VT_ARRAY
))
5550 r
|= lvalue_type(type
.t
);
5551 has_init
= (tok
== '=');
5552 if ((btype
.t
& VT_EXTERN
) ||
5553 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
5554 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
5555 /* external variable */
5556 /* NOTE: as GCC, uninitialized global static
5557 arrays of null size are considered as
5559 external_sym(v
, &type
, r
);
5561 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
5562 if (type
.t
& VT_STATIC
)
5568 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, l
);