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
)
153 /* find a symbol and return its associated structure. 's' is the top
154 of the symbol stack */
155 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
165 /* structure lookup */
166 ST_INLN Sym
*struct_find(int v
)
169 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
171 return table_ident
[v
]->sym_struct
;
174 /* find an identifier */
175 ST_INLN Sym
*sym_find(int v
)
178 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
180 return table_ident
[v
]->sym_identifier
;
183 /* push a given symbol on the symbol stack */
184 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
193 s
= sym_push2(ps
, v
, type
->t
, c
);
194 s
->type
.ref
= type
->ref
;
196 /* don't record fields or anonymous symbols */
198 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
199 /* record symbol in token array */
200 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
202 ps
= &ts
->sym_struct
;
204 ps
= &ts
->sym_identifier
;
211 /* push a global identifier */
212 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
215 s
= sym_push2(&global_stack
, v
, t
, c
);
216 /* don't record anonymous symbol */
217 if (v
< SYM_FIRST_ANOM
) {
218 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
219 /* modify the top most local identifier, so that
220 sym_identifier will point to 's' when popped */
222 ps
= &(*ps
)->prev_tok
;
229 /* pop symbols until top reaches 'b' */
230 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
240 /* remove symbol in token array */
242 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
243 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
245 ps
= &ts
->sym_struct
;
247 ps
= &ts
->sym_identifier
;
256 /* ------------------------------------------------------------------------- */
258 ST_FUNC
void swap(int *p
, int *q
)
266 static void vsetc(CType
*type
, int r
, CValue
*vc
)
270 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
271 error("memory full");
272 /* cannot let cpu flags if other instruction are generated. Also
273 avoid leaving VT_JMP anywhere except on the top of the stack
274 because it would complicate the code generator. */
275 if (vtop
>= vstack
) {
276 v
= vtop
->r
& VT_VALMASK
;
277 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
287 /* push integer constant */
288 ST_FUNC
void vpushi(int v
)
292 vsetc(&int_type
, VT_CONST
, &cval
);
295 /* push long long constant */
296 static void vpushll(long long v
)
303 vsetc(&ctype
, VT_CONST
, &cval
);
306 /* Return a static symbol pointing to a section */
307 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
313 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
314 sym
->type
.ref
= type
->ref
;
315 sym
->r
= VT_CONST
| VT_SYM
;
316 put_extern_sym(sym
, sec
, offset
, size
);
320 /* push a reference to a section offset by adding a dummy symbol */
321 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
326 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
327 vtop
->sym
= get_sym_ref(type
, sec
, offset
, size
);
330 /* define a new external reference to a symbol 'v' of type 'u' */
331 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
337 /* push forward reference */
338 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
339 s
->type
.ref
= type
->ref
;
340 s
->r
= r
| VT_CONST
| VT_SYM
;
345 /* define a new external reference to a symbol 'v' of type 'u' */
346 static Sym
*external_sym(int v
, CType
*type
, int r
)
352 /* push forward reference */
353 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
354 s
->type
.t
|= VT_EXTERN
;
355 } else if (s
->type
.ref
== func_old_type
.ref
) {
356 s
->type
.ref
= type
->ref
;
357 s
->r
= r
| VT_CONST
| VT_SYM
;
358 s
->type
.t
|= VT_EXTERN
;
359 } else if (!is_compatible_types(&s
->type
, type
)) {
360 error("incompatible types for redefinition of '%s'",
361 get_tok_str(v
, NULL
));
366 /* push a reference to global symbol v */
367 static void vpush_global_sym(CType
*type
, int v
)
372 sym
= external_global_sym(v
, type
, 0);
374 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
378 ST_FUNC
void vset(CType
*type
, int r
, int v
)
383 vsetc(type
, r
, &cval
);
386 static void vseti(int r
, int v
)
394 ST_FUNC
void vswap(void)
403 ST_FUNC
void vpushv(SValue
*v
)
405 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
406 error("memory full");
411 static void vdup(void)
416 /* save r to the memory stack, and mark it as being free */
417 ST_FUNC
void save_reg(int r
)
419 int l
, saved
, size
, align
;
423 /* modify all stack values */
426 for(p
=vstack
;p
<=vtop
;p
++) {
427 if ((p
->r
& VT_VALMASK
) == r
||
428 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
429 /* must save value on stack if not already done */
431 /* NOTE: must reload 'r' because r might be equal to r2 */
432 r
= p
->r
& VT_VALMASK
;
433 /* store register in the stack */
435 if ((p
->r
& VT_LVAL
) ||
436 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
437 #ifdef TCC_TARGET_X86_64
438 type
= &char_pointer_type
;
442 size
= type_size(type
, &align
);
443 loc
= (loc
- size
) & -align
;
445 sv
.r
= VT_LOCAL
| VT_LVAL
;
448 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
449 /* x86 specific: need to pop fp register ST0 if saved */
451 o(0xd8dd); /* fstp %st(0) */
454 #ifndef TCC_TARGET_X86_64
455 /* special long long case */
456 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
464 /* mark that stack entry as being saved on the stack */
465 if (p
->r
& VT_LVAL
) {
466 /* also clear the bounded flag because the
467 relocation address of the function was stored in
469 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
471 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
479 #ifdef TCC_TARGET_ARM
480 /* find a register of class 'rc2' with at most one reference on stack.
481 * If none, call get_reg(rc) */
482 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
487 for(r
=0;r
<NB_REGS
;r
++) {
488 if (reg_classes
[r
] & rc2
) {
491 for(p
= vstack
; p
<= vtop
; p
++) {
492 if ((p
->r
& VT_VALMASK
) == r
||
493 (p
->r2
& VT_VALMASK
) == r
)
504 /* find a free register of class 'rc'. If none, save one register */
505 ST_FUNC
int get_reg(int rc
)
510 /* find a free register */
511 for(r
=0;r
<NB_REGS
;r
++) {
512 if (reg_classes
[r
] & rc
) {
513 for(p
=vstack
;p
<=vtop
;p
++) {
514 if ((p
->r
& VT_VALMASK
) == r
||
515 (p
->r2
& VT_VALMASK
) == r
)
523 /* no register left : free the first one on the stack (VERY
524 IMPORTANT to start from the bottom to ensure that we don't
525 spill registers used in gen_opi()) */
526 for(p
=vstack
;p
<=vtop
;p
++) {
527 r
= p
->r
& VT_VALMASK
;
528 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
530 /* also look at second register (if long long) */
531 r
= p
->r2
& VT_VALMASK
;
532 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
538 /* Should never comes here */
542 /* save registers up to (vtop - n) stack entry */
543 ST_FUNC
void save_regs(int n
)
548 for(p
= vstack
;p
<= p1
; p
++) {
549 r
= p
->r
& VT_VALMASK
;
556 /* move register 's' to 'r', and flush previous value of r to memory
558 static void move_reg(int r
, int s
)
571 /* get address of vtop (vtop MUST BE an lvalue) */
572 static void gaddrof(void)
575 /* tricky: if saved lvalue, then we can go back to lvalue */
576 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
577 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
580 #ifdef CONFIG_TCC_BCHECK
581 /* generate lvalue bound code */
582 static void gbound(void)
587 vtop
->r
&= ~VT_MUSTBOUND
;
588 /* if lvalue, then use checking code before dereferencing */
589 if (vtop
->r
& VT_LVAL
) {
590 /* if not VT_BOUNDED value, then make one */
591 if (!(vtop
->r
& VT_BOUNDED
)) {
592 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
593 /* must save type because we must set it to int to get pointer */
595 vtop
->type
.t
= VT_INT
;
598 gen_bounded_ptr_add();
599 vtop
->r
|= lval_type
;
602 /* then check for dereferencing */
603 gen_bounded_ptr_deref();
608 /* store vtop a register belonging to class 'rc'. lvalues are
609 converted to values. Cannot be used if cannot be converted to
610 register value (such as structures). */
611 ST_FUNC
int gv(int rc
)
613 int r
, rc2
, bit_pos
, bit_size
, size
, align
, i
;
615 /* NOTE: get_reg can modify vstack[] */
616 if (vtop
->type
.t
& VT_BITFIELD
) {
619 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
620 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
621 /* remove bit field info to avoid loops */
622 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
623 /* cast to int to propagate signedness in following ops */
624 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
629 if((vtop
->type
.t
& VT_UNSIGNED
) ||
630 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
631 type
.t
|= VT_UNSIGNED
;
633 /* generate shifts */
634 vpushi(bits
- (bit_pos
+ bit_size
));
636 vpushi(bits
- bit_size
);
637 /* NOTE: transformed to SHR if unsigned */
641 if (is_float(vtop
->type
.t
) &&
642 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
645 unsigned long offset
;
646 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
650 /* XXX: unify with initializers handling ? */
651 /* CPUs usually cannot use float constants, so we store them
652 generically in data segment */
653 size
= type_size(&vtop
->type
, &align
);
654 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
655 data_section
->data_offset
= offset
;
656 /* XXX: not portable yet */
657 #if defined(__i386__) || defined(__x86_64__)
658 /* Zero pad x87 tenbyte long doubles */
659 if (size
== LDOUBLE_SIZE
)
660 vtop
->c
.tab
[2] &= 0xffff;
662 ptr
= section_ptr_add(data_section
, size
);
664 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
668 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
672 ptr
[i
] = vtop
->c
.tab
[i
];
673 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
674 vtop
->r
|= VT_LVAL
| VT_SYM
;
678 #ifdef CONFIG_TCC_BCHECK
679 if (vtop
->r
& VT_MUSTBOUND
)
683 r
= vtop
->r
& VT_VALMASK
;
687 /* need to reload if:
689 - lvalue (need to dereference pointer)
690 - already a register, but not in the right class */
692 || (vtop
->r
& VT_LVAL
)
693 || !(reg_classes
[r
] & rc
)
694 #ifndef TCC_TARGET_X86_64
695 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
700 #ifndef TCC_TARGET_X86_64
701 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
703 unsigned long long ll
;
704 /* two register type load : expand to two words
706 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
709 vtop
->c
.ui
= ll
; /* first word */
711 vtop
->r
= r
; /* save register value */
712 vpushi(ll
>> 32); /* second word */
713 } else if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
714 (vtop
->r
& VT_LVAL
)) {
715 /* We do not want to modifier the long long
716 pointer here, so the safest (and less
717 efficient) is to save all the other registers
718 in the stack. XXX: totally inefficient. */
720 /* load from memory */
723 vtop
[-1].r
= r
; /* save register value */
724 /* increment pointer to get second word */
725 vtop
->type
.t
= VT_INT
;
734 vtop
[-1].r
= r
; /* save register value */
735 vtop
->r
= vtop
[-1].r2
;
737 /* allocate second register */
741 /* write second register */
745 if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
747 /* lvalue of scalar type : need to use lvalue type
748 because of possible cast */
751 /* compute memory access type */
752 if (vtop
->r
& VT_LVAL_BYTE
)
754 else if (vtop
->r
& VT_LVAL_SHORT
)
756 if (vtop
->r
& VT_LVAL_UNSIGNED
)
760 /* restore wanted type */
763 /* one register type load */
768 #ifdef TCC_TARGET_C67
769 /* uses register pairs for doubles */
770 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
777 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
778 ST_FUNC
void gv2(int rc1
, int rc2
)
782 /* generate more generic register first. But VT_JMP or VT_CMP
783 values must be generated first in all cases to avoid possible
785 v
= vtop
[0].r
& VT_VALMASK
;
786 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
791 /* test if reload is needed for first register */
792 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
802 /* test if reload is needed for first register */
803 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
809 /* wrapper around RC_FRET to return a register by type */
810 static int rc_fret(int t
)
812 #ifdef TCC_TARGET_X86_64
813 if (t
== VT_LDOUBLE
) {
820 /* wrapper around REG_FRET to return a register by type */
821 static int reg_fret(int t
)
823 #ifdef TCC_TARGET_X86_64
824 if (t
== VT_LDOUBLE
) {
831 /* expand long long on stack in two int registers */
832 static void lexpand(void)
836 u
= vtop
->type
.t
& VT_UNSIGNED
;
839 vtop
[0].r
= vtop
[-1].r2
;
840 vtop
[0].r2
= VT_CONST
;
841 vtop
[-1].r2
= VT_CONST
;
842 vtop
[0].type
.t
= VT_INT
| u
;
843 vtop
[-1].type
.t
= VT_INT
| u
;
846 #ifdef TCC_TARGET_ARM
847 /* expand long long on stack */
848 ST_FUNC
void lexpand_nr(void)
852 u
= vtop
->type
.t
& VT_UNSIGNED
;
855 vtop
->type
.t
= VT_INT
| u
;
856 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
858 vtop
[-1].c
.ui
= vtop
->c
.ull
;
859 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
861 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
863 vtop
->r
= vtop
[-1].r
;
864 } else if (v
> VT_CONST
) {
868 vtop
->r
= vtop
[-1].r2
;
869 vtop
[-1].r2
= VT_CONST
;
870 vtop
[-1].type
.t
= VT_INT
| u
;
874 /* build a long long from two ints */
875 static void lbuild(int t
)
878 vtop
[-1].r2
= vtop
[0].r
;
883 /* rotate n first stack elements to the bottom
884 I1 ... In -> I2 ... In I1 [top is right]
886 static void vrotb(int n
)
897 /* rotate n first stack elements to the top
898 I1 ... In -> In I1 ... I(n-1) [top is right]
900 static void vrott(int n
)
906 for(i
= 0;i
< n
- 1; i
++)
907 vtop
[-i
] = vtop
[-i
- 1];
911 #ifdef TCC_TARGET_ARM
912 /* like vrott but in other direction
913 In ... I1 -> I(n-1) ... I1 In [top is right]
921 for(i
= n
- 1; i
> 0; i
--)
922 vtop
[-i
] = vtop
[-i
+ 1];
927 /* pop stack value */
928 ST_FUNC
void vpop(void)
931 v
= vtop
->r
& VT_VALMASK
;
932 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
933 /* for x86, we need to pop the FP stack */
934 if (v
== TREG_ST0
&& !nocode_wanted
) {
935 o(0xd8dd); /* fstp %st(0) */
938 if (v
== VT_JMP
|| v
== VT_JMPI
) {
939 /* need to put correct jump if && or || without test */
945 /* convert stack entry to register and duplicate its value in another
947 static void gv_dup(void)
953 if ((t
& VT_BTYPE
) == VT_LLONG
) {
960 /* stack: H L L1 H1 */
968 /* duplicate value */
973 #ifdef TCC_TARGET_X86_64
974 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
984 load(r1
, &sv
); /* move r to r1 */
986 /* duplicates value */
992 #ifndef TCC_TARGET_X86_64
993 /* generate CPU independent (unsigned) long long operations */
994 static void gen_opl(int op
)
996 int t
, a
, b
, op1
, c
, i
;
998 unsigned short reg_iret
= REG_IRET
;
999 unsigned short reg_lret
= REG_LRET
;
1005 func
= TOK___divdi3
;
1008 func
= TOK___udivdi3
;
1011 func
= TOK___moddi3
;
1014 func
= TOK___umoddi3
;
1021 /* call generic long long function */
1022 vpush_global_sym(&func_old_type
, func
);
1027 vtop
->r2
= reg_lret
;
1040 /* stack: L1 H1 L2 H2 */
1045 vtop
[-2] = vtop
[-3];
1048 /* stack: H1 H2 L1 L2 */
1054 /* stack: H1 H2 L1 L2 ML MH */
1057 /* stack: ML MH H1 H2 L1 L2 */
1061 /* stack: ML MH H1 L2 H2 L1 */
1066 /* stack: ML MH M1 M2 */
1069 } else if (op
== '+' || op
== '-') {
1070 /* XXX: add non carry method too (for MIPS or alpha) */
1076 /* stack: H1 H2 (L1 op L2) */
1079 gen_op(op1
+ 1); /* TOK_xxxC2 */
1082 /* stack: H1 H2 (L1 op L2) */
1085 /* stack: (L1 op L2) H1 H2 */
1087 /* stack: (L1 op L2) (H1 op H2) */
1095 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1096 t
= vtop
[-1].type
.t
;
1100 /* stack: L H shift */
1102 /* constant: simpler */
1103 /* NOTE: all comments are for SHL. the other cases are
1104 done by swaping words */
1115 if (op
!= TOK_SAR
) {
1148 /* XXX: should provide a faster fallback on x86 ? */
1151 func
= TOK___ashrdi3
;
1154 func
= TOK___lshrdi3
;
1157 func
= TOK___ashldi3
;
1163 /* compare operations */
1169 /* stack: L1 H1 L2 H2 */
1171 vtop
[-1] = vtop
[-2];
1173 /* stack: L1 L2 H1 H2 */
1176 /* when values are equal, we need to compare low words. since
1177 the jump is inverted, we invert the test too. */
1180 else if (op1
== TOK_GT
)
1182 else if (op1
== TOK_ULT
)
1184 else if (op1
== TOK_UGT
)
1189 if (op1
!= TOK_NE
) {
1193 /* generate non equal test */
1194 /* XXX: NOT PORTABLE yet */
1198 #if defined(TCC_TARGET_I386)
1199 b
= psym(0x850f, 0);
1200 #elif defined(TCC_TARGET_ARM)
1202 o(0x1A000000 | encbranch(ind
, 0, 1));
1203 #elif defined(TCC_TARGET_C67)
1204 error("not implemented");
1206 #error not supported
1210 /* compare low. Always unsigned */
1214 else if (op1
== TOK_LE
)
1216 else if (op1
== TOK_GT
)
1218 else if (op1
== TOK_GE
)
1229 /* handle integer constant optimizations and various machine
1231 static void gen_opic(int op
)
1233 int c1
, c2
, t1
, t2
, n
;
1236 typedef unsigned long long U
;
1240 t1
= v1
->type
.t
& VT_BTYPE
;
1241 t2
= v2
->type
.t
& VT_BTYPE
;
1245 else if (v1
->type
.t
& VT_UNSIGNED
)
1252 else if (v2
->type
.t
& VT_UNSIGNED
)
1257 /* currently, we cannot do computations with forward symbols */
1258 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1259 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1262 case '+': l1
+= l2
; break;
1263 case '-': l1
-= l2
; break;
1264 case '&': l1
&= l2
; break;
1265 case '^': l1
^= l2
; break;
1266 case '|': l1
|= l2
; break;
1267 case '*': l1
*= l2
; break;
1274 /* if division by zero, generate explicit division */
1277 error("division by zero in constant");
1281 default: l1
/= l2
; break;
1282 case '%': l1
%= l2
; break;
1283 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1284 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1287 case TOK_SHL
: l1
<<= l2
; break;
1288 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1289 case TOK_SAR
: l1
>>= l2
; break;
1291 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1292 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1293 case TOK_EQ
: l1
= l1
== l2
; break;
1294 case TOK_NE
: l1
= l1
!= l2
; break;
1295 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1296 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1297 case TOK_LT
: l1
= l1
< l2
; break;
1298 case TOK_GE
: l1
= l1
>= l2
; break;
1299 case TOK_LE
: l1
= l1
<= l2
; break;
1300 case TOK_GT
: l1
= l1
> l2
; break;
1302 case TOK_LAND
: l1
= l1
&& l2
; break;
1303 case TOK_LOR
: l1
= l1
|| l2
; break;
1310 /* if commutative ops, put c2 as constant */
1311 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1312 op
== '|' || op
== '*')) {
1314 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1315 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1317 /* Filter out NOP operations like x*1, x-0, x&-1... */
1318 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1321 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1322 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1328 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1329 /* try to use shifts instead of muls or divs */
1330 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1339 else if (op
== TOK_PDIV
)
1345 } else if (c2
&& (op
== '+' || op
== '-') &&
1346 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
)
1347 && !(vtop
[-1].sym
->type
.t
& VT_IMPORT
))
1349 (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1350 /* symbol + constant case */
1357 if (!nocode_wanted
) {
1358 /* call low level op generator */
1359 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1370 /* generate a floating point operation with constant propagation */
1371 static void gen_opif(int op
)
1379 /* currently, we cannot do computations with forward symbols */
1380 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1381 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1383 if (v1
->type
.t
== VT_FLOAT
) {
1386 } else if (v1
->type
.t
== VT_DOUBLE
) {
1394 /* NOTE: we only do constant propagation if finite number (not
1395 NaN or infinity) (ANSI spec) */
1396 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1400 case '+': f1
+= f2
; break;
1401 case '-': f1
-= f2
; break;
1402 case '*': f1
*= f2
; break;
1406 error("division by zero in constant");
1411 /* XXX: also handles tests ? */
1415 /* XXX: overflow test ? */
1416 if (v1
->type
.t
== VT_FLOAT
) {
1418 } else if (v1
->type
.t
== VT_DOUBLE
) {
1426 if (!nocode_wanted
) {
1434 static int pointed_size(CType
*type
)
1437 return type_size(pointed_type(type
), &align
);
1440 static inline int is_null_pointer(SValue
*p
)
1442 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1444 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1445 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0);
1448 static inline int is_integer_btype(int bt
)
1450 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1451 bt
== VT_INT
|| bt
== VT_LLONG
);
1454 /* check types for comparison or substraction of pointers */
1455 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1457 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1460 /* null pointers are accepted for all comparisons as gcc */
1461 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1465 bt1
= type1
->t
& VT_BTYPE
;
1466 bt2
= type2
->t
& VT_BTYPE
;
1467 /* accept comparison between pointer and integer with a warning */
1468 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1469 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1470 warning("comparison between pointer and integer");
1474 /* both must be pointers or implicit function pointers */
1475 if (bt1
== VT_PTR
) {
1476 type1
= pointed_type(type1
);
1477 } else if (bt1
!= VT_FUNC
)
1478 goto invalid_operands
;
1480 if (bt2
== VT_PTR
) {
1481 type2
= pointed_type(type2
);
1482 } else if (bt2
!= VT_FUNC
) {
1484 error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1486 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1487 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1491 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1492 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1493 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1494 /* gcc-like error if '-' is used */
1496 goto invalid_operands
;
1498 warning("comparison of distinct pointer types lacks a cast");
1502 /* generic gen_op: handles types problems */
1503 ST_FUNC
void gen_op(int op
)
1505 int u
, t1
, t2
, bt1
, bt2
, t
;
1508 t1
= vtop
[-1].type
.t
;
1509 t2
= vtop
[0].type
.t
;
1510 bt1
= t1
& VT_BTYPE
;
1511 bt2
= t2
& VT_BTYPE
;
1513 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1514 /* at least one operand is a pointer */
1515 /* relationnal op: must be both pointers */
1516 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1517 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1518 /* pointers are handled are unsigned */
1519 #ifdef TCC_TARGET_X86_64
1520 t
= VT_LLONG
| VT_UNSIGNED
;
1522 t
= VT_INT
| VT_UNSIGNED
;
1526 /* if both pointers, then it must be the '-' op */
1527 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1529 error("cannot use pointers here");
1530 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1531 /* XXX: check that types are compatible */
1532 u
= pointed_size(&vtop
[-1].type
);
1534 /* set to integer type */
1535 #ifdef TCC_TARGET_X86_64
1536 vtop
->type
.t
= VT_LLONG
;
1538 vtop
->type
.t
= VT_INT
;
1543 /* exactly one pointer : must be '+' or '-'. */
1544 if (op
!= '-' && op
!= '+')
1545 error("cannot use pointers here");
1546 /* Put pointer as first operand */
1547 if (bt2
== VT_PTR
) {
1551 type1
= vtop
[-1].type
;
1552 type1
.t
&= ~VT_ARRAY
;
1553 #ifdef TCC_TARGET_X86_64
1554 vpushll(pointed_size(&vtop
[-1].type
));
1556 /* XXX: cast to int ? (long long case) */
1557 vpushi(pointed_size(&vtop
[-1].type
));
1560 #ifdef CONFIG_TCC_BCHECK
1561 /* if evaluating constant expression, no code should be
1562 generated, so no bound check */
1563 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1564 /* if bounded pointers, we generate a special code to
1571 gen_bounded_ptr_add();
1577 /* put again type if gen_opic() swaped operands */
1580 } else if (is_float(bt1
) || is_float(bt2
)) {
1581 /* compute bigger type and do implicit casts */
1582 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1584 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1589 /* floats can only be used for a few operations */
1590 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1591 (op
< TOK_ULT
|| op
> TOK_GT
))
1592 error("invalid operands for binary operation");
1594 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1595 /* cast to biggest op */
1597 /* convert to unsigned if it does not fit in a long long */
1598 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1599 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1603 /* integer operations */
1605 /* convert to unsigned if it does not fit in an integer */
1606 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1607 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1610 /* XXX: currently, some unsigned operations are explicit, so
1611 we modify them here */
1612 if (t
& VT_UNSIGNED
) {
1619 else if (op
== TOK_LT
)
1621 else if (op
== TOK_GT
)
1623 else if (op
== TOK_LE
)
1625 else if (op
== TOK_GE
)
1632 /* special case for shifts and long long: we keep the shift as
1634 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1641 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1642 /* relationnal op: the result is an int */
1643 vtop
->type
.t
= VT_INT
;
1650 #ifndef TCC_TARGET_ARM
1651 /* generic itof for unsigned long long case */
1652 static void gen_cvt_itof1(int t
)
1654 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1655 (VT_LLONG
| VT_UNSIGNED
)) {
1658 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1659 #if LDOUBLE_SIZE != 8
1660 else if (t
== VT_LDOUBLE
)
1661 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1664 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1668 vtop
->r
= reg_fret(t
);
1675 /* generic ftoi for unsigned long long case */
1676 static void gen_cvt_ftoi1(int t
)
1680 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1681 /* not handled natively */
1682 st
= vtop
->type
.t
& VT_BTYPE
;
1684 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1685 #if LDOUBLE_SIZE != 8
1686 else if (st
== VT_LDOUBLE
)
1687 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1690 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1695 vtop
->r2
= REG_LRET
;
1701 /* force char or short cast */
1702 static void force_charshort_cast(int t
)
1706 /* XXX: add optimization if lvalue : just change type and offset */
1711 if (t
& VT_UNSIGNED
) {
1712 vpushi((1 << bits
) - 1);
1718 /* result must be signed or the SAR is converted to an SHL
1719 This was not the case when "t" was a signed short
1720 and the last value on the stack was an unsigned int */
1721 vtop
->type
.t
&= ~VT_UNSIGNED
;
1727 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1728 static void gen_cast(CType
*type
)
1730 int sbt
, dbt
, sf
, df
, c
, p
;
1732 /* special delayed cast for char/short */
1733 /* XXX: in some cases (multiple cascaded casts), it may still
1735 if (vtop
->r
& VT_MUSTCAST
) {
1736 vtop
->r
&= ~VT_MUSTCAST
;
1737 force_charshort_cast(vtop
->type
.t
);
1740 /* bitfields first get cast to ints */
1741 if (vtop
->type
.t
& VT_BITFIELD
) {
1745 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1746 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1751 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1752 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1754 /* constant case: we can do it now */
1755 /* XXX: in ISOC, cannot do it if error in convert */
1756 if (sbt
== VT_FLOAT
)
1757 vtop
->c
.ld
= vtop
->c
.f
;
1758 else if (sbt
== VT_DOUBLE
)
1759 vtop
->c
.ld
= vtop
->c
.d
;
1762 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1763 if (sbt
& VT_UNSIGNED
)
1764 vtop
->c
.ld
= vtop
->c
.ull
;
1766 vtop
->c
.ld
= vtop
->c
.ll
;
1768 if (sbt
& VT_UNSIGNED
)
1769 vtop
->c
.ld
= vtop
->c
.ui
;
1771 vtop
->c
.ld
= vtop
->c
.i
;
1774 if (dbt
== VT_FLOAT
)
1775 vtop
->c
.f
= (float)vtop
->c
.ld
;
1776 else if (dbt
== VT_DOUBLE
)
1777 vtop
->c
.d
= (double)vtop
->c
.ld
;
1778 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1779 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1780 } else if (sf
&& dbt
== VT_BOOL
) {
1781 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1784 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1785 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1786 vtop
->c
.ll
= vtop
->c
.ull
;
1787 else if (sbt
& VT_UNSIGNED
)
1788 vtop
->c
.ll
= vtop
->c
.ui
;
1789 #ifdef TCC_TARGET_X86_64
1790 else if (sbt
== VT_PTR
)
1793 else if (sbt
!= VT_LLONG
)
1794 vtop
->c
.ll
= vtop
->c
.i
;
1796 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1797 vtop
->c
.ull
= vtop
->c
.ll
;
1798 else if (dbt
== VT_BOOL
)
1799 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1800 else if (dbt
!= VT_LLONG
) {
1802 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1804 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1807 if(dbt
& VT_UNSIGNED
)
1808 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1810 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1813 } else if (p
&& dbt
== VT_BOOL
) {
1816 } else if (!nocode_wanted
) {
1817 /* non constant case: generate code */
1819 /* convert from fp to fp */
1822 /* convert int to fp */
1825 /* convert fp to int */
1826 if (dbt
== VT_BOOL
) {
1830 /* we handle char/short/etc... with generic code */
1831 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1832 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1836 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1837 /* additional cast for char/short... */
1842 #ifndef TCC_TARGET_X86_64
1843 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1844 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1845 /* scalar to long long */
1846 /* machine independent conversion */
1848 /* generate high word */
1849 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
1853 if (sbt
== VT_PTR
) {
1854 /* cast from pointer to int before we apply
1855 shift operation, which pointers don't support*/
1856 gen_cast(&int_type
);
1862 /* patch second register */
1863 vtop
[-1].r2
= vtop
->r
;
1867 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
1868 (dbt
& VT_BTYPE
) == VT_PTR
) {
1869 /* XXX: not sure if this is perfect... need more tests */
1870 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1872 if (sbt
!= (VT_INT
| VT_UNSIGNED
) &&
1873 sbt
!= VT_PTR
&& sbt
!= VT_FUNC
) {
1874 /* x86_64 specific: movslq */
1876 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
1880 } else if (dbt
== VT_BOOL
) {
1881 /* scalar to bool */
1884 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
1885 (dbt
& VT_BTYPE
) == VT_SHORT
) {
1886 if (sbt
== VT_PTR
) {
1887 vtop
->type
.t
= VT_INT
;
1888 warning("nonportable conversion from pointer to char/short");
1890 force_charshort_cast(dbt
);
1891 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
1893 if (sbt
== VT_LLONG
) {
1894 /* from long long: just take low order word */
1898 /* if lvalue and single word type, nothing to do because
1899 the lvalue already contains the real type size (see
1900 VT_LVAL_xxx constants) */
1903 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
1904 /* if we are casting between pointer types,
1905 we must update the VT_LVAL_xxx size */
1906 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
1907 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
1912 /* return type size. Put alignment at 'a' */
1913 ST_FUNC
int type_size(CType
*type
, int *a
)
1918 bt
= type
->t
& VT_BTYPE
;
1919 if (bt
== VT_STRUCT
) {
1924 } else if (bt
== VT_PTR
) {
1925 if (type
->t
& VT_ARRAY
) {
1929 ts
= type_size(&s
->type
, a
);
1931 if (ts
< 0 && s
->c
< 0)
1939 } else if (bt
== VT_LDOUBLE
) {
1941 return LDOUBLE_SIZE
;
1942 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
1943 #ifdef TCC_TARGET_I386
1944 #ifdef TCC_TARGET_PE
1949 #elif defined(TCC_TARGET_ARM)
1959 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
1962 } else if (bt
== VT_SHORT
) {
1966 /* char, void, function, _Bool */
1972 /* return the pointed type of t */
1973 static inline CType
*pointed_type(CType
*type
)
1975 return &type
->ref
->type
;
1978 /* modify type so that its it is a pointer to type. */
1979 ST_FUNC
void mk_pointer(CType
*type
)
1982 s
= sym_push(SYM_FIELD
, type
, 0, -1);
1983 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
1987 /* compare function types. OLD functions match any new functions */
1988 static int is_compatible_func(CType
*type1
, CType
*type2
)
1994 if (!is_compatible_types(&s1
->type
, &s2
->type
))
1996 /* check func_call */
1997 if (FUNC_CALL(s1
->r
) != FUNC_CALL(s2
->r
))
1999 /* XXX: not complete */
2000 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2004 while (s1
!= NULL
) {
2007 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2017 /* return true if type1 and type2 are the same. If unqualified is
2018 true, qualifiers on the types are ignored.
2020 - enums are not checked as gcc __builtin_types_compatible_p ()
2022 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2026 t1
= type1
->t
& VT_TYPE
;
2027 t2
= type2
->t
& VT_TYPE
;
2029 /* strip qualifiers before comparing */
2030 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2031 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2033 /* XXX: bitfields ? */
2036 /* test more complicated cases */
2037 bt1
= t1
& VT_BTYPE
;
2038 if (bt1
== VT_PTR
) {
2039 type1
= pointed_type(type1
);
2040 type2
= pointed_type(type2
);
2041 return is_compatible_types(type1
, type2
);
2042 } else if (bt1
== VT_STRUCT
) {
2043 return (type1
->ref
== type2
->ref
);
2044 } else if (bt1
== VT_FUNC
) {
2045 return is_compatible_func(type1
, type2
);
2051 /* return true if type1 and type2 are exactly the same (including
2054 static int is_compatible_types(CType
*type1
, CType
*type2
)
2056 return compare_types(type1
,type2
,0);
2059 /* return true if type1 and type2 are the same (ignoring qualifiers).
2061 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2063 return compare_types(type1
,type2
,1);
2066 /* print a type. If 'varstr' is not NULL, then the variable is also
2067 printed in the type */
2069 /* XXX: add array and function pointers */
2070 static void type_to_str(char *buf
, int buf_size
,
2071 CType
*type
, const char *varstr
)
2078 t
= type
->t
& VT_TYPE
;
2081 if (t
& VT_CONSTANT
)
2082 pstrcat(buf
, buf_size
, "const ");
2083 if (t
& VT_VOLATILE
)
2084 pstrcat(buf
, buf_size
, "volatile ");
2085 if (t
& VT_UNSIGNED
)
2086 pstrcat(buf
, buf_size
, "unsigned ");
2116 tstr
= "long double";
2118 pstrcat(buf
, buf_size
, tstr
);
2122 if (bt
== VT_STRUCT
)
2126 pstrcat(buf
, buf_size
, tstr
);
2127 v
= type
->ref
->v
& ~SYM_STRUCT
;
2128 if (v
>= SYM_FIRST_ANOM
)
2129 pstrcat(buf
, buf_size
, "<anonymous>");
2131 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2135 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2136 pstrcat(buf
, buf_size
, "(");
2138 while (sa
!= NULL
) {
2139 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2140 pstrcat(buf
, buf_size
, buf1
);
2143 pstrcat(buf
, buf_size
, ", ");
2145 pstrcat(buf
, buf_size
, ")");
2149 pstrcpy(buf1
, sizeof(buf1
), "*");
2151 pstrcat(buf1
, sizeof(buf1
), varstr
);
2152 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2156 pstrcat(buf
, buf_size
, " ");
2157 pstrcat(buf
, buf_size
, varstr
);
2162 /* verify type compatibility to store vtop in 'dt' type, and generate
2164 static void gen_assign_cast(CType
*dt
)
2166 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2167 char buf1
[256], buf2
[256];
2170 st
= &vtop
->type
; /* source type */
2171 dbt
= dt
->t
& VT_BTYPE
;
2172 sbt
= st
->t
& VT_BTYPE
;
2173 if (dt
->t
& VT_CONSTANT
)
2174 warning("assignment of read-only location");
2177 /* special cases for pointers */
2178 /* '0' can also be a pointer */
2179 if (is_null_pointer(vtop
))
2181 /* accept implicit pointer to integer cast with warning */
2182 if (is_integer_btype(sbt
)) {
2183 warning("assignment makes pointer from integer without a cast");
2186 type1
= pointed_type(dt
);
2187 /* a function is implicitely a function pointer */
2188 if (sbt
== VT_FUNC
) {
2189 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2190 !is_compatible_types(pointed_type(dt
), st
))
2191 warning("assignment from incompatible pointer type");
2196 type2
= pointed_type(st
);
2197 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2198 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2199 /* void * can match anything */
2201 /* exact type match, except for unsigned */
2204 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2205 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2206 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2207 warning("assignment from incompatible pointer type");
2209 /* check const and volatile */
2210 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2211 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2212 warning("assignment discards qualifiers from pointer target type");
2218 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2219 warning("assignment makes integer from pointer without a cast");
2221 /* XXX: more tests */
2226 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2227 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2228 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2230 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2231 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2232 error("cannot cast '%s' to '%s'", buf1
, buf2
);
2240 /* store vtop in lvalue pushed on stack */
2241 ST_FUNC
void vstore(void)
2243 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2245 ft
= vtop
[-1].type
.t
;
2246 sbt
= vtop
->type
.t
& VT_BTYPE
;
2247 dbt
= ft
& VT_BTYPE
;
2248 if (((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2249 (sbt
== VT_INT
&& dbt
== VT_SHORT
)) {
2250 /* optimize char/short casts */
2251 delayed_cast
= VT_MUSTCAST
;
2252 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2253 /* XXX: factorize */
2254 if (ft
& VT_CONSTANT
)
2255 warning("assignment of read-only location");
2258 if (!(ft
& VT_BITFIELD
))
2259 gen_assign_cast(&vtop
[-1].type
);
2262 if (sbt
== VT_STRUCT
) {
2263 /* if structure, only generate pointer */
2264 /* structure assignment : generate memcpy */
2265 /* XXX: optimize if small size */
2266 if (!nocode_wanted
) {
2267 size
= type_size(&vtop
->type
, &align
);
2271 vtop
->type
.t
= VT_PTR
;
2274 /* address of memcpy() */
2277 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2278 else if(!(align
& 3))
2279 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2282 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2287 vtop
->type
.t
= VT_PTR
;
2296 /* leave source on stack */
2297 } else if (ft
& VT_BITFIELD
) {
2298 /* bitfield store handling */
2299 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2300 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2301 /* remove bit field info to avoid loops */
2302 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2304 /* duplicate source into other register */
2309 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2310 gen_cast(&vtop
[-1].type
);
2311 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2314 /* duplicate destination */
2316 vtop
[-1] = vtop
[-2];
2318 /* mask and shift source */
2319 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2320 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2321 vpushll((1ULL << bit_size
) - 1ULL);
2323 vpushi((1 << bit_size
) - 1);
2329 /* load destination, mask and or with source */
2331 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2332 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2334 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2341 /* pop off shifted source from "duplicate source..." above */
2345 #ifdef CONFIG_TCC_BCHECK
2346 /* bound check case */
2347 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2353 if (!nocode_wanted
) {
2357 #ifdef TCC_TARGET_X86_64
2358 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2363 r
= gv(rc
); /* generate value */
2364 /* if lvalue was saved on stack, must read it */
2365 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2367 t
= get_reg(RC_INT
);
2368 #ifdef TCC_TARGET_X86_64
2373 sv
.r
= VT_LOCAL
| VT_LVAL
;
2374 sv
.c
.ul
= vtop
[-1].c
.ul
;
2376 vtop
[-1].r
= t
| VT_LVAL
;
2379 #ifndef TCC_TARGET_X86_64
2380 /* two word case handling : store second register at word + 4 */
2381 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2383 /* convert to int to increment easily */
2384 vtop
->type
.t
= VT_INT
;
2390 /* XXX: it works because r2 is spilled last ! */
2391 store(vtop
->r2
, vtop
- 1);
2396 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2397 vtop
->r
|= delayed_cast
;
2401 /* post defines POST/PRE add. c is the token ++ or -- */
2402 ST_FUNC
void inc(int post
, int c
)
2405 vdup(); /* save lvalue */
2407 gv_dup(); /* duplicate value */
2412 vpushi(c
- TOK_MID
);
2414 vstore(); /* store value */
2416 vpop(); /* if post op, return saved value */
2419 /* Parse GNUC __attribute__ extension. Currently, the following
2420 extensions are recognized:
2421 - aligned(n) : set data/function alignment.
2422 - packed : force data alignment to 1
2423 - section(x) : generate data/code in this section.
2424 - unused : currently ignored, but may be used someday.
2425 - regparm(n) : pass function parameters in registers (i386 only)
2427 static void parse_attribute(AttributeDef
*ad
)
2431 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2435 while (tok
!= ')') {
2436 if (tok
< TOK_IDENT
)
2437 expect("attribute name");
2445 expect("section name");
2446 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2455 if (n
<= 0 || (n
& (n
- 1)) != 0)
2456 error("alignment must be a positive power of two");
2469 /* currently, no need to handle it because tcc does not
2470 track unused objects */
2474 /* currently, no need to handle it because tcc does not
2475 track unused objects */
2480 ad
->func_call
= FUNC_CDECL
;
2485 ad
->func_call
= FUNC_STDCALL
;
2487 #ifdef TCC_TARGET_I386
2497 ad
->func_call
= FUNC_FASTCALL1
+ n
- 1;
2503 ad
->func_call
= FUNC_FASTCALLW
;
2507 ad
->func_export
= 1;
2510 ad
->func_import
= 1;
2513 if (tcc_state
->warn_unsupported
)
2514 warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2515 /* skip parameters */
2517 int parenthesis
= 0;
2521 else if (tok
== ')')
2524 } while (parenthesis
&& tok
!= -1);
2537 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2538 static void struct_decl(CType
*type
, int u
)
2540 int a
, v
, size
, align
, maxalign
, c
, offset
;
2541 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2542 Sym
*s
, *ss
, *ass
, **ps
;
2546 a
= tok
; /* save decl type */
2551 /* struct already defined ? return it */
2553 expect("struct/union/enum name");
2557 error("invalid type");
2564 /* we put an undefined size for struct/union */
2565 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2566 s
->r
= 0; /* default alignment is zero as gcc */
2567 /* put struct/union/enum name in type */
2575 error("struct/union/enum already defined");
2576 /* cannot be empty */
2578 /* non empty enums are not allowed */
2579 if (a
== TOK_ENUM
) {
2583 expect("identifier");
2589 /* enum symbols have static storage */
2590 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2591 ss
->type
.t
|= VT_STATIC
;
2596 /* NOTE: we accept a trailing comma */
2607 while (tok
!= '}') {
2608 parse_btype(&btype
, &ad
);
2614 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2615 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2616 expect("identifier");
2617 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2618 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2619 error("invalid type for '%s'",
2620 get_tok_str(v
, NULL
));
2624 bit_size
= expr_const();
2625 /* XXX: handle v = 0 case for messages */
2627 error("negative width in bit-field '%s'",
2628 get_tok_str(v
, NULL
));
2629 if (v
&& bit_size
== 0)
2630 error("zero width for bit-field '%s'",
2631 get_tok_str(v
, NULL
));
2633 size
= type_size(&type1
, &align
);
2635 if (align
< ad
.aligned
)
2637 } else if (ad
.packed
) {
2639 } else if (*tcc_state
->pack_stack_ptr
) {
2640 if (align
> *tcc_state
->pack_stack_ptr
)
2641 align
= *tcc_state
->pack_stack_ptr
;
2644 if (bit_size
>= 0) {
2645 bt
= type1
.t
& VT_BTYPE
;
2652 error("bitfields must have scalar type");
2654 if (bit_size
> bsize
) {
2655 error("width of '%s' exceeds its type",
2656 get_tok_str(v
, NULL
));
2657 } else if (bit_size
== bsize
) {
2658 /* no need for bit fields */
2660 } else if (bit_size
== 0) {
2661 /* XXX: what to do if only padding in a
2663 /* zero size: means to pad */
2666 /* we do not have enough room ?
2667 did the type change?
2669 if ((bit_pos
+ bit_size
) > bsize
||
2670 bt
!= prevbt
|| a
== TOK_UNION
)
2673 /* XXX: handle LSB first */
2674 type1
.t
|= VT_BITFIELD
|
2675 (bit_pos
<< VT_STRUCT_SHIFT
) |
2676 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2677 bit_pos
+= bit_size
;
2683 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2684 /* add new memory data only if starting
2686 if (lbit_pos
== 0) {
2687 if (a
== TOK_STRUCT
) {
2688 c
= (c
+ align
- 1) & -align
;
2697 if (align
> maxalign
)
2701 printf("add field %s offset=%d",
2702 get_tok_str(v
, NULL
), offset
);
2703 if (type1
.t
& VT_BITFIELD
) {
2704 printf(" pos=%d size=%d",
2705 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2706 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2711 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2713 while ((ass
= ass
->next
) != NULL
) {
2714 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2719 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2723 if (tok
== ';' || tok
== TOK_EOF
)
2730 /* store size and alignment */
2731 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2737 /* return 0 if no type declaration. otherwise, return the basic type
2740 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2742 int t
, u
, type_found
, typespec_found
, typedef_found
;
2746 memset(ad
, 0, sizeof(AttributeDef
));
2754 /* currently, we really ignore extension */
2764 if ((t
& VT_BTYPE
) != 0)
2765 error("too many basic types");
2781 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
2782 #ifndef TCC_TARGET_PE
2783 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2785 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
2786 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2800 if ((t
& VT_BTYPE
) == VT_LONG
) {
2801 #ifdef TCC_TARGET_PE
2802 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
2804 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2812 struct_decl(&type1
, VT_ENUM
);
2815 type
->ref
= type1
.ref
;
2819 struct_decl(&type1
, VT_STRUCT
);
2822 /* type modifiers */
2875 /* GNUC attribute */
2876 case TOK_ATTRIBUTE1
:
2877 case TOK_ATTRIBUTE2
:
2878 parse_attribute(ad
);
2885 parse_expr_type(&type1
);
2888 if (typespec_found
|| typedef_found
)
2891 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
2894 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
2895 type
->ref
= s
->type
.ref
;
2897 /* get attributes from typedef */
2898 if (0 == ad
->aligned
)
2899 ad
->aligned
= FUNC_ALIGN(s
->r
);
2900 if (0 == ad
->func_call
)
2901 ad
->func_call
= FUNC_CALL(s
->r
);
2902 ad
->packed
|= FUNC_PACKED(s
->r
);
2911 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
2912 error("signed and unsigned modifier");
2913 if (tcc_state
->char_is_unsigned
) {
2914 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
2919 /* long is never used as type */
2920 if ((t
& VT_BTYPE
) == VT_LONG
)
2921 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
2922 t
= (t
& ~VT_BTYPE
) | VT_INT
;
2924 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2930 /* convert a function parameter type (array to pointer and function to
2931 function pointer) */
2932 static inline void convert_parameter_type(CType
*pt
)
2934 /* remove const and volatile qualifiers (XXX: const could be used
2935 to indicate a const function parameter */
2936 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2937 /* array must be transformed to pointer according to ANSI C */
2939 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
2944 static void post_type(CType
*type
, AttributeDef
*ad
)
2946 int n
, l
, t1
, arg_size
, align
;
2947 Sym
**plast
, *s
, *first
;
2952 /* function declaration */
2960 /* read param name and compute offset */
2961 if (l
!= FUNC_OLD
) {
2962 if (!parse_btype(&pt
, &ad1
)) {
2964 error("invalid type");
2971 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
2973 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2974 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
2975 error("parameter declared as void");
2976 arg_size
+= (type_size(&pt
, &align
) + 3) & ~3;
2981 expect("identifier");
2985 convert_parameter_type(&pt
);
2986 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
2992 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
2999 /* if no parameters, then old type prototype */
3003 t1
= type
->t
& VT_STORAGE
;
3004 /* NOTE: const is ignored in returned type as it has a special
3005 meaning in gcc / C++ */
3006 type
->t
&= ~(VT_STORAGE
| VT_CONSTANT
);
3007 post_type(type
, ad
);
3008 /* we push a anonymous symbol which will contain the function prototype */
3009 ad
->func_args
= arg_size
;
3010 s
= sym_push(SYM_FIELD
, type
, INT_ATTR(ad
), l
);
3012 type
->t
= t1
| VT_FUNC
;
3014 } else if (tok
== '[') {
3015 /* array definition */
3017 if (tok
== TOK_RESTRICT1
)
3023 error("invalid array size");
3026 /* parse next post type */
3027 t1
= type
->t
& VT_STORAGE
;
3028 type
->t
&= ~VT_STORAGE
;
3029 post_type(type
, ad
);
3031 /* we push a anonymous symbol which will contain the array
3033 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3034 type
->t
= t1
| VT_ARRAY
| VT_PTR
;
3039 /* Parse a type declaration (except basic type), and return the type
3040 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3041 expected. 'type' should contain the basic type. 'ad' is the
3042 attribute definition of the basic type. It can be modified by
3045 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3048 CType type1
, *type2
;
3051 while (tok
== '*') {
3059 qualifiers
|= VT_CONSTANT
;
3064 qualifiers
|= VT_VOLATILE
;
3072 type
->t
|= qualifiers
;
3075 /* XXX: clarify attribute handling */
3076 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3077 parse_attribute(ad
);
3079 /* recursive type */
3080 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3081 type1
.t
= 0; /* XXX: same as int */
3084 /* XXX: this is not correct to modify 'ad' at this point, but
3085 the syntax is not clear */
3086 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3087 parse_attribute(ad
);
3088 type_decl(&type1
, ad
, v
, td
);
3091 /* type identifier */
3092 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3096 if (!(td
& TYPE_ABSTRACT
))
3097 expect("identifier");
3101 post_type(type
, ad
);
3102 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3103 parse_attribute(ad
);
3106 /* append type at the end of type1 */
3119 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3120 ST_FUNC
int lvalue_type(int t
)
3125 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3127 else if (bt
== VT_SHORT
)
3131 if (t
& VT_UNSIGNED
)
3132 r
|= VT_LVAL_UNSIGNED
;
3136 /* indirection with full error checking and bound check */
3137 ST_FUNC
void indir(void)
3139 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3140 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3144 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3146 vtop
->type
= *pointed_type(&vtop
->type
);
3147 /* Arrays and functions are never lvalues */
3148 if (!(vtop
->type
.t
& VT_ARRAY
)
3149 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3150 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3151 /* if bound checking, the referenced pointer must be checked */
3152 #ifdef CONFIG_TCC_BCHECK
3153 if (tcc_state
->do_bounds_check
)
3154 vtop
->r
|= VT_MUSTBOUND
;
3159 /* pass a parameter to a function and do type checking and casting */
3160 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3165 func_type
= func
->c
;
3166 if (func_type
== FUNC_OLD
||
3167 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3168 /* default casting : only need to convert float to double */
3169 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3173 } else if (arg
== NULL
) {
3174 error("too many arguments to function");
3177 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3178 gen_assign_cast(&type
);
3182 /* parse an expression of the form '(type)' or '(expr)' and return its
3184 static void parse_expr_type(CType
*type
)
3190 if (parse_btype(type
, &ad
)) {
3191 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3198 static void parse_type(CType
*type
)
3203 if (!parse_btype(type
, &ad
)) {
3206 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3209 static void vpush_tokc(int t
)
3214 vsetc(&type
, VT_CONST
, &tokc
);
3217 ST_FUNC
void unary(void)
3219 int n
, t
, align
, size
, r
;
3224 /* XXX: GCC 2.95.3 does not generate a table although it should be
3238 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3242 vpush_tokc(VT_LLONG
);
3246 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3250 vpush_tokc(VT_FLOAT
);
3254 vpush_tokc(VT_DOUBLE
);
3258 vpush_tokc(VT_LDOUBLE
);
3261 case TOK___FUNCTION__
:
3263 goto tok_identifier
;
3269 /* special function name identifier */
3270 len
= strlen(funcname
) + 1;
3271 /* generate char[len] type */
3276 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3277 ptr
= section_ptr_add(data_section
, len
);
3278 memcpy(ptr
, funcname
, len
);
3283 #ifdef TCC_TARGET_PE
3284 t
= VT_SHORT
| VT_UNSIGNED
;
3290 /* string parsing */
3293 if (tcc_state
->warn_write_strings
)
3298 memset(&ad
, 0, sizeof(AttributeDef
));
3299 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
3304 if (parse_btype(&type
, &ad
)) {
3305 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3307 /* check ISOC99 compound literal */
3309 /* data is allocated locally by default */
3314 /* all except arrays are lvalues */
3315 if (!(type
.t
& VT_ARRAY
))
3316 r
|= lvalue_type(type
.t
);
3317 memset(&ad
, 0, sizeof(AttributeDef
));
3318 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
3323 } else if (tok
== '{') {
3324 /* save all registers */
3326 /* statement expression : we do not accept break/continue
3327 inside as GCC does */
3328 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3343 /* functions names must be treated as function pointers,
3344 except for unary '&' and sizeof. Since we consider that
3345 functions are not lvalues, we only have to handle it
3346 there and in function calls. */
3347 /* arrays can also be used although they are not lvalues */
3348 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3349 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3351 mk_pointer(&vtop
->type
);
3357 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3359 boolean
.t
= VT_BOOL
;
3361 vtop
->c
.i
= !vtop
->c
.i
;
3362 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3363 vtop
->c
.i
= vtop
->c
.i
^ 1;
3366 vseti(VT_JMP
, gtst(1, 0));
3377 /* in order to force cast, we add zero */
3379 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3380 error("pointer not accepted for unary plus");
3390 parse_expr_type(&type
);
3394 size
= type_size(&type
, &align
);
3395 if (t
== TOK_SIZEOF
) {
3397 error("sizeof applied to an incomplete type");
3402 vtop
->type
.t
|= VT_UNSIGNED
;
3405 case TOK_builtin_types_compatible_p
:
3414 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3415 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3416 vpushi(is_compatible_types(&type1
, &type2
));
3419 case TOK_builtin_constant_p
:
3421 int saved_nocode_wanted
, res
;
3424 saved_nocode_wanted
= nocode_wanted
;
3427 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3429 nocode_wanted
= saved_nocode_wanted
;
3434 case TOK_builtin_frame_address
:
3439 if (tok
!= TOK_CINT
) {
3440 error("__builtin_frame_address only takes integers");
3443 error("TCC only supports __builtin_frame_address(0)");
3449 vset(&type
, VT_LOCAL
, 0);
3452 #ifdef TCC_TARGET_X86_64
3453 case TOK_builtin_malloc
:
3455 goto tok_identifier
;
3456 case TOK_builtin_free
:
3458 goto tok_identifier
;
3475 goto tok_identifier
;
3477 /* allow to take the address of a label */
3478 if (tok
< TOK_UIDENT
)
3479 expect("label identifier");
3480 s
= label_find(tok
);
3482 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3484 if (s
->r
== LABEL_DECLARED
)
3485 s
->r
= LABEL_FORWARD
;
3488 s
->type
.t
= VT_VOID
;
3489 mk_pointer(&s
->type
);
3490 s
->type
.t
|= VT_STATIC
;
3492 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3501 expect("identifier");
3505 error("'%s' undeclared", get_tok_str(t
, NULL
));
3506 /* for simple function calls, we tolerate undeclared
3507 external reference to int() function */
3508 if (tcc_state
->warn_implicit_function_declaration
)
3509 warning("implicit declaration of function '%s'",
3510 get_tok_str(t
, NULL
));
3511 s
= external_global_sym(t
, &func_old_type
, 0);
3513 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3514 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3515 /* if referencing an inline function, then we generate a
3516 symbol to it if not already done. It will have the
3517 effect to generate code for it at the end of the
3518 compilation unit. Inline function as always
3519 generated in the text section. */
3521 put_extern_sym(s
, text_section
, 0, 0);
3522 r
= VT_SYM
| VT_CONST
;
3526 vset(&s
->type
, r
, s
->c
);
3527 /* if forward reference, we must point to s */
3528 if (vtop
->r
& VT_SYM
) {
3535 /* post operations */
3537 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3540 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3543 if (tok
== TOK_ARROW
)
3545 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3549 /* expect pointer on structure */
3550 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3551 expect("struct or union");
3555 while ((s
= s
->next
) != NULL
) {
3560 error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3561 /* add field offset to pointer */
3562 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3565 /* change type to field type, and set to lvalue */
3566 vtop
->type
= s
->type
;
3567 vtop
->type
.t
|= qualifiers
;
3568 /* an array is never an lvalue */
3569 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3570 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3571 #ifdef CONFIG_TCC_BCHECK
3572 /* if bound checking, the referenced pointer must be checked */
3573 if (tcc_state
->do_bounds_check
)
3574 vtop
->r
|= VT_MUSTBOUND
;
3578 } else if (tok
== '[') {
3584 } else if (tok
== '(') {
3590 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3591 /* pointer test (no array accepted) */
3592 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3593 vtop
->type
= *pointed_type(&vtop
->type
);
3594 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3598 expect("function pointer");
3601 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3603 /* get return type */
3606 sa
= s
->next
; /* first parameter */
3609 /* compute first implicit argument if a structure is returned */
3610 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3611 /* get some space for the returned structure */
3612 size
= type_size(&s
->type
, &align
);
3613 loc
= (loc
- size
) & -align
;
3615 ret
.r
= VT_LOCAL
| VT_LVAL
;
3616 /* pass it as 'int' to avoid structure arg passing
3618 vseti(VT_LOCAL
, loc
);
3623 /* return in register */
3624 if (is_float(ret
.type
.t
)) {
3625 ret
.r
= reg_fret(ret
.type
.t
);
3627 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
3636 gfunc_param_typed(s
, sa
);
3646 error("too few arguments to function");
3648 if (!nocode_wanted
) {
3649 gfunc_call(nb_args
);
3651 vtop
-= (nb_args
+ 1);
3654 vsetc(&ret
.type
, ret
.r
, &ret
.c
);
3662 static void uneq(void)
3668 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
3669 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
3670 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
3685 ST_FUNC
void expr_prod(void)
3690 while (tok
== '*' || tok
== '/' || tok
== '%') {
3698 ST_FUNC
void expr_sum(void)
3703 while (tok
== '+' || tok
== '-') {
3711 static void expr_shift(void)
3716 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
3724 static void expr_cmp(void)
3729 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
3730 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
3738 static void expr_cmpeq(void)
3743 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
3751 static void expr_and(void)
3754 while (tok
== '&') {
3761 static void expr_xor(void)
3764 while (tok
== '^') {
3771 static void expr_or(void)
3774 while (tok
== '|') {
3781 /* XXX: fix this mess */
3782 static void expr_land_const(void)
3785 while (tok
== TOK_LAND
) {
3792 /* XXX: fix this mess */
3793 static void expr_lor_const(void)
3796 while (tok
== TOK_LOR
) {
3803 /* only used if non constant */
3804 static void expr_land(void)
3809 if (tok
== TOK_LAND
) {
3814 if (tok
!= TOK_LAND
) {
3824 static void expr_lor(void)
3829 if (tok
== TOK_LOR
) {
3834 if (tok
!= TOK_LOR
) {
3844 /* XXX: better constant handling */
3845 static void expr_eq(void)
3847 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
3849 CType type
, type1
, type2
;
3856 boolean
.t
= VT_BOOL
;
3862 if (tok
!= ':' || !gnu_ext
) {
3877 if (vtop
!= vstack
) {
3878 /* needed to avoid having different registers saved in
3880 if (is_float(vtop
->type
.t
)) {
3882 #ifdef TCC_TARGET_X86_64
3883 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
3893 if (tok
== ':' && gnu_ext
) {
3901 sv
= *vtop
; /* save value to handle it later */
3902 vtop
--; /* no vpop so that FP stack is not flushed */
3910 bt1
= t1
& VT_BTYPE
;
3912 bt2
= t2
& VT_BTYPE
;
3913 /* cast operands to correct type according to ISOC rules */
3914 if (is_float(bt1
) || is_float(bt2
)) {
3915 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
3916 type
.t
= VT_LDOUBLE
;
3917 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
3922 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
3923 /* cast to biggest op */
3925 /* convert to unsigned if it does not fit in a long long */
3926 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
3927 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
3928 type
.t
|= VT_UNSIGNED
;
3929 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
3930 /* XXX: test pointer compatibility */
3932 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
3933 /* XXX: test function pointer compatibility */
3935 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
3936 /* XXX: test structure compatibility */
3938 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
3939 /* NOTE: as an extension, we accept void on only one side */
3942 /* integer operations */
3944 /* convert to unsigned if it does not fit in an integer */
3945 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
3946 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
3947 type
.t
|= VT_UNSIGNED
;
3950 /* now we convert second operand */
3952 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
3955 if (is_float(type
.t
)) {
3957 #ifdef TCC_TARGET_X86_64
3958 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
3962 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
3963 /* for long longs, we use fixed registers to avoid having
3964 to handle a complicated move */
3969 /* this is horrible, but we must also convert first
3973 /* put again first value and cast it */
3976 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
3986 ST_FUNC
void gexpr(void)
3997 /* parse an expression and return its type without any side effect. */
3998 static void expr_type(CType
*type
)
4000 int saved_nocode_wanted
;
4002 saved_nocode_wanted
= nocode_wanted
;
4007 nocode_wanted
= saved_nocode_wanted
;
4010 /* parse a unary expression and return its type without any side
4012 static void unary_type(CType
*type
)
4024 /* parse a constant expression and return value in vtop. */
4025 static void expr_const1(void)
4034 /* parse an integer constant and return its value. */
4035 ST_FUNC
int expr_const(void)
4039 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4040 expect("constant expression");
4046 /* return the label token if current token is a label, otherwise
4048 static int is_label(void)
4052 /* fast test first */
4053 if (tok
< TOK_UIDENT
)
4055 /* no need to save tokc because tok is an identifier */
4062 unget_tok(last_tok
);
4067 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4068 int case_reg
, int is_expr
)
4073 /* generate line number info */
4074 if (tcc_state
->do_debug
&&
4075 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4076 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4078 last_line_num
= file
->line_num
;
4082 /* default return value is (void) */
4084 vtop
->type
.t
= VT_VOID
;
4087 if (tok
== TOK_IF
) {
4094 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4096 if (c
== TOK_ELSE
) {
4100 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4101 gsym(d
); /* patch else jmp */
4104 } else if (tok
== TOK_WHILE
) {
4112 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4116 } else if (tok
== '{') {
4120 /* record local declaration stack position */
4122 llabel
= local_label_stack
;
4123 /* handle local labels declarations */
4124 if (tok
== TOK_LABEL
) {
4127 if (tok
< TOK_UIDENT
)
4128 expect("label identifier");
4129 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4139 while (tok
!= '}') {
4144 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4147 /* pop locally defined labels */
4148 label_pop(&local_label_stack
, llabel
);
4149 /* pop locally defined symbols */
4151 /* XXX: this solution makes only valgrind happy...
4152 triggered by gcc.c-torture/execute/20000917-1.c */
4154 switch(vtop
->type
.t
& VT_BTYPE
) {
4159 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4161 error("unsupported expression type");
4164 sym_pop(&local_stack
, s
);
4166 } else if (tok
== TOK_RETURN
) {
4170 gen_assign_cast(&func_vt
);
4171 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4173 /* if returning structure, must copy it to implicit
4174 first pointer arg location */
4177 size
= type_size(&func_vt
,&align
);
4180 if((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& 3))
4184 loc
= (loc
- size
) & -4;
4187 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4190 vset(&int_type
, VT_LOCAL
| VT_LVAL
, addr
);
4192 vtop
->type
= int_type
;
4198 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4201 /* copy structure value to pointer */
4206 } else if (is_float(func_vt
.t
)) {
4207 gv(rc_fret(func_vt
.t
));
4211 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4214 rsym
= gjmp(rsym
); /* jmp */
4215 } else if (tok
== TOK_BREAK
) {
4218 error("cannot break");
4219 *bsym
= gjmp(*bsym
);
4222 } else if (tok
== TOK_CONTINUE
) {
4225 error("cannot continue");
4226 *csym
= gjmp(*csym
);
4229 } else if (tok
== TOK_FOR
) {
4256 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4261 if (tok
== TOK_DO
) {
4266 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4277 if (tok
== TOK_SWITCH
) {
4281 /* XXX: other types than integer */
4282 case_reg
= gv(RC_INT
);
4286 b
= gjmp(0); /* jump to first case */
4288 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4289 /* if no default, jmp after switch */
4297 if (tok
== TOK_CASE
) {
4304 if (gnu_ext
&& tok
== TOK_DOTS
) {
4308 warning("empty case range");
4310 /* since a case is like a label, we must skip it with a jmp */
4317 *case_sym
= gtst(1, 0);
4320 *case_sym
= gtst(1, 0);
4324 *case_sym
= gtst(1, *case_sym
);
4329 goto block_after_label
;
4331 if (tok
== TOK_DEFAULT
) {
4337 error("too many 'default'");
4340 goto block_after_label
;
4342 if (tok
== TOK_GOTO
) {
4344 if (tok
== '*' && gnu_ext
) {
4348 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4351 } else if (tok
>= TOK_UIDENT
) {
4352 s
= label_find(tok
);
4353 /* put forward definition if needed */
4355 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4357 if (s
->r
== LABEL_DECLARED
)
4358 s
->r
= LABEL_FORWARD
;
4360 /* label already defined */
4361 if (s
->r
& LABEL_FORWARD
)
4362 s
->jnext
= gjmp(s
->jnext
);
4364 gjmp_addr(s
->jnext
);
4367 expect("label identifier");
4370 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4378 if (s
->r
== LABEL_DEFINED
)
4379 error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4381 s
->r
= LABEL_DEFINED
;
4383 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4386 /* we accept this, but it is a mistake */
4389 warning("deprecated use of label at end of compound statement");
4393 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4396 /* expression case */
4411 /* t is the array or struct type. c is the array or struct
4412 address. cur_index/cur_field is the pointer to the current
4413 value. 'size_only' is true if only size info is needed (only used
4415 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4416 int *cur_index
, Sym
**cur_field
,
4420 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4426 if (gnu_ext
&& (l
= is_label()) != 0)
4428 while (tok
== '[' || tok
== '.') {
4430 if (!(type
->t
& VT_ARRAY
))
4431 expect("array type");
4434 index
= expr_const();
4435 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4436 expect("invalid index");
4437 if (tok
== TOK_DOTS
&& gnu_ext
) {
4439 index_last
= expr_const();
4440 if (index_last
< 0 ||
4441 (s
->c
>= 0 && index_last
>= s
->c
) ||
4443 expect("invalid index");
4449 *cur_index
= index_last
;
4450 type
= pointed_type(type
);
4451 elem_size
= type_size(type
, &align
);
4452 c
+= index
* elem_size
;
4453 /* NOTE: we only support ranges for last designator */
4454 nb_elems
= index_last
- index
+ 1;
4455 if (nb_elems
!= 1) {
4464 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4465 expect("struct/union type");
4478 /* XXX: fix this mess by using explicit storage field */
4480 type1
.t
|= (type
->t
& ~VT_TYPE
);
4494 if (type
->t
& VT_ARRAY
) {
4496 type
= pointed_type(type
);
4497 c
+= index
* type_size(type
, &align
);
4501 error("too many field init");
4502 /* XXX: fix this mess by using explicit storage field */
4504 type1
.t
|= (type
->t
& ~VT_TYPE
);
4509 decl_initializer(type
, sec
, c
, 0, size_only
);
4511 /* XXX: make it more general */
4512 if (!size_only
&& nb_elems
> 1) {
4513 unsigned long c_end
;
4518 error("range init not supported yet for dynamic storage");
4519 c_end
= c
+ nb_elems
* elem_size
;
4520 if (c_end
> sec
->data_allocated
)
4521 section_realloc(sec
, c_end
);
4522 src
= sec
->data
+ c
;
4524 for(i
= 1; i
< nb_elems
; i
++) {
4526 memcpy(dst
, src
, elem_size
);
4532 #define EXPR_CONST 1
4535 /* store a value or an expression directly in global data or in local array */
4536 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
4537 int v
, int expr_type
)
4539 int saved_global_expr
, bt
, bit_pos
, bit_size
;
4541 unsigned long long bit_mask
;
4549 /* compound literals must be allocated globally in this case */
4550 saved_global_expr
= global_expr
;
4553 global_expr
= saved_global_expr
;
4554 /* NOTE: symbols are accepted */
4555 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
4556 error("initializer element is not constant");
4564 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
4567 /* XXX: not portable */
4568 /* XXX: generate error if incorrect relocation */
4569 gen_assign_cast(&dtype
);
4570 bt
= type
->t
& VT_BTYPE
;
4571 /* we'll write at most 12 bytes */
4572 if (c
+ 12 > sec
->data_allocated
) {
4573 section_realloc(sec
, c
+ 12);
4575 ptr
= sec
->data
+ c
;
4576 /* XXX: make code faster ? */
4577 if (!(type
->t
& VT_BITFIELD
)) {
4582 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4583 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
4584 bit_mask
= (1LL << bit_size
) - 1;
4586 if ((vtop
->r
& VT_SYM
) &&
4592 (bt
== VT_INT
&& bit_size
!= 32)))
4593 error("initializer element is not computable at load time");
4596 vtop
->c
.i
= (vtop
->c
.i
!= 0);
4598 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4601 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4604 *(double *)ptr
= vtop
->c
.d
;
4607 *(long double *)ptr
= vtop
->c
.ld
;
4610 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
4613 if (vtop
->r
& VT_SYM
) {
4614 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
4616 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4621 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
4628 /* put zeros for variable based init */
4629 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
4632 /* nothing to do because globals are already set to zero */
4634 vpush_global_sym(&func_old_type
, TOK_memset
);
4642 /* 't' contains the type and storage info. 'c' is the offset of the
4643 object in section 'sec'. If 'sec' is NULL, it means stack based
4644 allocation. 'first' is true if array '{' must be read (multi
4645 dimension implicit array init handling). 'size_only' is true if
4646 size only evaluation is wanted (only for arrays). */
4647 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
4648 int first
, int size_only
)
4650 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, i
;
4651 int size1
, align1
, expr_type
;
4655 if (type
->t
& VT_ARRAY
) {
4659 t1
= pointed_type(type
);
4660 size1
= type_size(t1
, &align1
);
4663 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
4669 /* only parse strings here if correct type (otherwise: handle
4670 them as ((w)char *) expressions */
4671 if ((tok
== TOK_LSTR
&&
4672 #ifdef TCC_TARGET_PE
4673 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
4675 (t1
->t
& VT_BTYPE
) == VT_INT
4677 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
4678 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
4683 /* compute maximum number of chars wanted */
4685 cstr_len
= cstr
->size
;
4687 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
4690 if (n
>= 0 && nb
> (n
- array_length
))
4691 nb
= n
- array_length
;
4694 warning("initializer-string for array is too long");
4695 /* in order to go faster for common case (char
4696 string in global variable, we handle it
4698 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
4699 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
4703 ch
= ((unsigned char *)cstr
->data
)[i
];
4705 ch
= ((nwchar_t
*)cstr
->data
)[i
];
4706 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
4714 /* only add trailing zero if enough storage (no
4715 warning in this case since it is standard) */
4716 if (n
< 0 || array_length
< n
) {
4718 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
4724 while (tok
!= '}') {
4725 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
4726 if (n
>= 0 && index
>= n
)
4727 error("index too large");
4728 /* must put zero in holes (note that doing it that way
4729 ensures that it even works with designators) */
4730 if (!size_only
&& array_length
< index
) {
4731 init_putz(t1
, sec
, c
+ array_length
* size1
,
4732 (index
- array_length
) * size1
);
4735 if (index
> array_length
)
4736 array_length
= index
;
4737 /* special test for multi dimensional arrays (may not
4738 be strictly correct if designators are used at the
4740 if (index
>= n
&& no_oblock
)
4749 /* put zeros at the end */
4750 if (!size_only
&& n
>= 0 && array_length
< n
) {
4751 init_putz(t1
, sec
, c
+ array_length
* size1
,
4752 (n
- array_length
) * size1
);
4754 /* patch type size if needed */
4756 s
->c
= array_length
;
4757 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
4758 (sec
|| !first
|| tok
== '{')) {
4761 /* NOTE: the previous test is a specific case for automatic
4762 struct/union init */
4763 /* XXX: union needs only one init */
4765 /* XXX: this test is incorrect for local initializers
4766 beginning with ( without {. It would be much more difficult
4767 to do it correctly (ideally, the expression parser should
4768 be used in all cases) */
4774 while (tok
== '(') {
4778 if (!parse_btype(&type1
, &ad1
))
4780 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
4782 if (!is_assignable_types(type
, &type1
))
4783 error("invalid type for cast");
4788 if (first
|| tok
== '{') {
4797 while (tok
!= '}') {
4798 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
4800 if (!size_only
&& array_length
< index
) {
4801 init_putz(type
, sec
, c
+ array_length
,
4802 index
- array_length
);
4804 index
= index
+ type_size(&f
->type
, &align1
);
4805 if (index
> array_length
)
4806 array_length
= index
;
4808 /* gr: skip fields from same union - ugly. */
4810 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
4811 /* test for same offset */
4812 if (f
->next
->c
!= f
->c
)
4814 /* if yes, test for bitfield shift */
4815 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
4816 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4817 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4818 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
4819 if (bit_pos_1
!= bit_pos_2
)
4826 if (no_oblock
&& f
== NULL
)
4832 /* put zeros at the end */
4833 if (!size_only
&& array_length
< n
) {
4834 init_putz(type
, sec
, c
+ array_length
,
4843 } else if (tok
== '{') {
4845 decl_initializer(type
, sec
, c
, first
, size_only
);
4847 } else if (size_only
) {
4848 /* just skip expression */
4850 while ((parlevel
> 0 || (tok
!= '}' && tok
!= ',')) &&
4854 else if (tok
== ')')
4859 /* currently, we always use constant expression for globals
4860 (may change for scripting case) */
4861 expr_type
= EXPR_CONST
;
4863 expr_type
= EXPR_ANY
;
4864 init_putv(type
, sec
, c
, 0, expr_type
);
4868 /* parse an initializer for type 't' if 'has_init' is non zero, and
4869 allocate space in local or global data space ('r' is either
4870 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
4871 variable 'v' of scope 'scope' is declared before initializers are
4872 parsed. If 'v' is zero, then a reference to the new object is put
4873 in the value stack. If 'has_init' is 2, a special parsing is done
4874 to handle string constants. */
4875 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
4876 int has_init
, int v
, int scope
)
4878 int size
, align
, addr
, data_offset
;
4880 ParseState saved_parse_state
= {0};
4881 TokenString init_str
;
4884 size
= type_size(type
, &align
);
4885 /* If unknown size, we must evaluate it before
4886 evaluating initializers because
4887 initializers can generate global data too
4888 (e.g. string pointers or ISOC99 compound
4889 literals). It also simplifies local
4890 initializers handling */
4891 tok_str_new(&init_str
);
4894 error("unknown type size");
4895 /* get all init string */
4896 if (has_init
== 2) {
4897 /* only get strings */
4898 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
4899 tok_str_add_tok(&init_str
);
4904 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
4906 error("unexpected end of file in initializer");
4907 tok_str_add_tok(&init_str
);
4910 else if (tok
== '}') {
4920 tok_str_add(&init_str
, -1);
4921 tok_str_add(&init_str
, 0);
4924 save_parse_state(&saved_parse_state
);
4926 macro_ptr
= init_str
.str
;
4928 decl_initializer(type
, NULL
, 0, 1, 1);
4929 /* prepare second initializer parsing */
4930 macro_ptr
= init_str
.str
;
4933 /* if still unknown size, error */
4934 size
= type_size(type
, &align
);
4936 error("unknown type size");
4938 /* take into account specified alignment if bigger */
4940 if (ad
->aligned
> align
)
4941 align
= ad
->aligned
;
4942 } else if (ad
->packed
) {
4945 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
4947 #ifdef CONFIG_TCC_BCHECK
4948 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
))
4951 loc
= (loc
- size
) & -align
;
4953 #ifdef CONFIG_TCC_BCHECK
4954 /* handles bounds */
4955 /* XXX: currently, since we do only one pass, we cannot track
4956 '&' operators, so we add only arrays */
4957 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
4958 unsigned long *bounds_ptr
;
4959 /* add padding between regions */
4961 /* then add local bound info */
4962 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
4963 bounds_ptr
[0] = addr
;
4964 bounds_ptr
[1] = size
;
4968 /* local variable */
4969 sym_push(v
, type
, r
, addr
);
4971 /* push local reference */
4972 vset(type
, r
, addr
);
4978 if (v
&& scope
== VT_CONST
) {
4979 /* see if the symbol was already defined */
4982 if (!is_compatible_types(&sym
->type
, type
))
4983 error("incompatible types for redefinition of '%s'",
4984 get_tok_str(v
, NULL
));
4985 if (sym
->type
.t
& VT_EXTERN
) {
4986 /* if the variable is extern, it was not allocated */
4987 sym
->type
.t
&= ~VT_EXTERN
;
4988 /* set array size if it was ommited in extern
4990 if ((sym
->type
.t
& VT_ARRAY
) &&
4991 sym
->type
.ref
->c
< 0 &&
4993 sym
->type
.ref
->c
= type
->ref
->c
;
4995 /* we accept several definitions of the same
4996 global variable. this is tricky, because we
4997 must play with the SHN_COMMON type of the symbol */
4998 /* XXX: should check if the variable was already
4999 initialized. It is incorrect to initialized it
5001 /* no init data, we won't add more to the symbol */
5008 /* allocate symbol in corresponding section */
5013 else if (tcc_state
->nocommon
)
5017 data_offset
= sec
->data_offset
;
5018 data_offset
= (data_offset
+ align
- 1) & -align
;
5020 /* very important to increment global pointer at this time
5021 because initializers themselves can create new initializers */
5022 data_offset
+= size
;
5023 #ifdef CONFIG_TCC_BCHECK
5024 /* add padding if bound check */
5025 if (tcc_state
->do_bounds_check
)
5028 sec
->data_offset
= data_offset
;
5029 /* allocate section space to put the data */
5030 if (sec
->sh_type
!= SHT_NOBITS
&&
5031 data_offset
> sec
->data_allocated
)
5032 section_realloc(sec
, data_offset
);
5033 /* align section if needed */
5034 if (align
> sec
->sh_addralign
)
5035 sec
->sh_addralign
= align
;
5037 addr
= 0; /* avoid warning */
5041 if (scope
!= VT_CONST
|| !sym
) {
5042 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5044 /* update symbol definition */
5046 put_extern_sym(sym
, sec
, addr
, size
);
5049 /* put a common area */
5050 put_extern_sym(sym
, NULL
, align
, size
);
5051 /* XXX: find a nicer way */
5052 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5053 esym
->st_shndx
= SHN_COMMON
;
5058 /* push global reference */
5059 sym
= get_sym_ref(type
, sec
, addr
, size
);
5061 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5064 #ifdef CONFIG_TCC_BCHECK
5065 /* handles bounds now because the symbol must be defined
5066 before for the relocation */
5067 if (tcc_state
->do_bounds_check
) {
5068 unsigned long *bounds_ptr
;
5070 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5071 /* then add global bound info */
5072 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5073 bounds_ptr
[0] = 0; /* relocated */
5074 bounds_ptr
[1] = size
;
5079 decl_initializer(type
, sec
, addr
, 1, 0);
5080 /* restore parse state if needed */
5082 tok_str_free(init_str
.str
);
5083 restore_parse_state(&saved_parse_state
);
5089 static void put_func_debug(Sym
*sym
)
5094 /* XXX: we put here a dummy type */
5095 snprintf(buf
, sizeof(buf
), "%s:%c1",
5096 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5097 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5098 cur_text_section
, sym
->c
);
5099 /* //gr gdb wants a line at the function */
5100 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5105 /* parse an old style function declaration list */
5106 /* XXX: check multiple parameter */
5107 static void func_decl_list(Sym
*func_sym
)
5114 /* parse each declaration */
5115 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
) {
5116 if (!parse_btype(&btype
, &ad
))
5117 expect("declaration list");
5118 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5119 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5121 /* we accept no variable after */
5125 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5126 /* find parameter in function parameter list */
5129 if ((s
->v
& ~SYM_FIELD
) == v
)
5133 error("declaration for parameter '%s' but no such parameter",
5134 get_tok_str(v
, NULL
));
5136 /* check that no storage specifier except 'register' was given */
5137 if (type
.t
& VT_STORAGE
)
5138 error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5139 convert_parameter_type(&type
);
5140 /* we can add the type (NOTE: it could be local to the function) */
5142 /* accept other parameters */
5153 /* parse a function defined by symbol 'sym' and generate its code in
5154 'cur_text_section' */
5155 static void gen_function(Sym
*sym
)
5157 int saved_nocode_wanted
= nocode_wanted
;
5159 ind
= cur_text_section
->data_offset
;
5160 /* NOTE: we patch the symbol size later */
5161 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5162 funcname
= get_tok_str(sym
->v
, NULL
);
5164 /* put debug symbol */
5165 if (tcc_state
->do_debug
)
5166 put_func_debug(sym
);
5167 /* push a dummy symbol to enable local sym storage */
5168 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5169 gfunc_prolog(&sym
->type
);
5171 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5174 cur_text_section
->data_offset
= ind
;
5175 label_pop(&global_label_stack
, NULL
);
5176 sym_pop(&local_stack
, NULL
); /* reset local stack */
5177 /* end of function */
5178 /* patch symbol size */
5179 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5181 if (tcc_state
->do_debug
) {
5182 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5184 /* It's better to crash than to generate wrong code */
5185 cur_text_section
= NULL
;
5186 funcname
= ""; /* for safety */
5187 func_vt
.t
= VT_VOID
; /* for safety */
5188 ind
= 0; /* for safety */
5189 nocode_wanted
= saved_nocode_wanted
;
5192 ST_FUNC
void gen_inline_functions(void)
5195 int *str
, inline_generated
, i
;
5196 struct InlineFunc
*fn
;
5198 /* iterate while inline function are referenced */
5200 inline_generated
= 0;
5201 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5202 fn
= tcc_state
->inline_fns
[i
];
5204 if (sym
&& sym
->c
) {
5205 /* the function was used: generate its code and
5206 convert it to a normal function */
5207 str
= fn
->token_str
;
5210 strcpy(file
->filename
, fn
->filename
);
5211 sym
->r
= VT_SYM
| VT_CONST
;
5212 sym
->type
.t
&= ~VT_INLINE
;
5216 cur_text_section
= text_section
;
5218 macro_ptr
= NULL
; /* fail safe */
5220 inline_generated
= 1;
5223 if (!inline_generated
)
5226 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5227 fn
= tcc_state
->inline_fns
[i
];
5228 str
= fn
->token_str
;
5231 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5234 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5235 ST_FUNC
void decl(int l
)
5243 if (!parse_btype(&btype
, &ad
)) {
5244 /* skip redundant ';' */
5245 /* XXX: find more elegant solution */
5250 if (l
== VT_CONST
&&
5251 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5252 /* global asm block */
5256 /* special test for old K&R protos without explicit int
5257 type. Only accepted when defining global data */
5258 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5262 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5263 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5265 /* we accept no variable after */
5269 while (1) { /* iterate thru each declaration */
5271 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5275 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5276 printf("type = '%s'\n", buf
);
5279 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5280 /* if old style function prototype, we accept a
5283 if (sym
->c
== FUNC_OLD
)
5284 func_decl_list(sym
);
5289 error("cannot use local functions");
5290 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5291 expect("function definition");
5293 /* reject abstract declarators in function definition */
5295 while ((sym
= sym
->next
) != NULL
)
5296 if (!(sym
->v
& ~SYM_FIELD
))
5297 expect("identifier");
5299 /* XXX: cannot do better now: convert extern line to static inline */
5300 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5301 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5305 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5308 r
= sym
->type
.ref
->r
;
5309 /* use func_call from prototype if not defined */
5310 if (FUNC_CALL(r
) != FUNC_CDECL
5311 && FUNC_CALL(type
.ref
->r
) == FUNC_CDECL
)
5312 FUNC_CALL(type
.ref
->r
) = FUNC_CALL(r
);
5314 /* use export from prototype */
5316 FUNC_EXPORT(type
.ref
->r
) = 1;
5318 /* use static from prototype */
5319 if (sym
->type
.t
& VT_STATIC
)
5320 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5322 if (!is_compatible_types(&sym
->type
, &type
)) {
5324 error("incompatible types for redefinition of '%s'",
5325 get_tok_str(v
, NULL
));
5327 /* if symbol is already defined, then put complete type */
5330 /* put function symbol */
5331 sym
= global_identifier_push(v
, type
.t
, 0);
5332 sym
->type
.ref
= type
.ref
;
5335 /* static inline functions are just recorded as a kind
5336 of macro. Their code will be emitted at the end of
5337 the compilation unit only if they are used */
5338 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5339 (VT_INLINE
| VT_STATIC
)) {
5340 TokenString func_str
;
5342 struct InlineFunc
*fn
;
5343 const char *filename
;
5345 tok_str_new(&func_str
);
5351 error("unexpected end of file");
5352 tok_str_add_tok(&func_str
);
5357 } else if (t
== '}') {
5359 if (block_level
== 0)
5363 tok_str_add(&func_str
, -1);
5364 tok_str_add(&func_str
, 0);
5365 filename
= file
? file
->filename
: "";
5366 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5367 strcpy(fn
->filename
, filename
);
5369 fn
->token_str
= func_str
.str
;
5370 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5373 /* compute text section */
5374 cur_text_section
= ad
.section
;
5375 if (!cur_text_section
)
5376 cur_text_section
= text_section
;
5377 sym
->r
= VT_SYM
| VT_CONST
;
5382 if (btype
.t
& VT_TYPEDEF
) {
5383 /* save typedefed type */
5384 /* XXX: test storage specifiers ? */
5385 sym
= sym_push(v
, &type
, INT_ATTR(&ad
), 0);
5386 sym
->type
.t
|= VT_TYPEDEF
;
5387 } else if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5388 /* external function definition */
5389 /* specific case for func_call attribute */
5390 type
.ref
->r
= INT_ATTR(&ad
);
5391 external_sym(v
, &type
, 0);
5393 /* not lvalue if array */
5395 if (!(type
.t
& VT_ARRAY
))
5396 r
|= lvalue_type(type
.t
);
5397 has_init
= (tok
== '=');
5398 if ((btype
.t
& VT_EXTERN
) ||
5399 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
5400 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
5401 /* external variable */
5402 /* NOTE: as GCC, uninitialized global static
5403 arrays of null size are considered as
5405 #ifdef TCC_TARGET_PE
5407 type
.t
|= VT_IMPORT
;
5409 external_sym(v
, &type
, r
);
5411 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
5412 if (type
.t
& VT_STATIC
)
5418 #ifdef TCC_TARGET_PE
5420 type
.t
|= VT_EXPORT
;
5422 decl_initializer_alloc(&type
, &ad
, r
,