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 ST_FUNC
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 ST_FUNC
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]
915 ST_FUNC
void vnrott(int n
)
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].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1348 /* symbol + constant case */
1355 if (!nocode_wanted
) {
1356 /* call low level op generator */
1357 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1368 /* generate a floating point operation with constant propagation */
1369 static void gen_opif(int op
)
1377 /* currently, we cannot do computations with forward symbols */
1378 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1379 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1381 if (v1
->type
.t
== VT_FLOAT
) {
1384 } else if (v1
->type
.t
== VT_DOUBLE
) {
1392 /* NOTE: we only do constant propagation if finite number (not
1393 NaN or infinity) (ANSI spec) */
1394 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1398 case '+': f1
+= f2
; break;
1399 case '-': f1
-= f2
; break;
1400 case '*': f1
*= f2
; break;
1404 error("division by zero in constant");
1409 /* XXX: also handles tests ? */
1413 /* XXX: overflow test ? */
1414 if (v1
->type
.t
== VT_FLOAT
) {
1416 } else if (v1
->type
.t
== VT_DOUBLE
) {
1424 if (!nocode_wanted
) {
1432 static int pointed_size(CType
*type
)
1435 return type_size(pointed_type(type
), &align
);
1438 static inline int is_null_pointer(SValue
*p
)
1440 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1442 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1443 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0);
1446 static inline int is_integer_btype(int bt
)
1448 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1449 bt
== VT_INT
|| bt
== VT_LLONG
);
1452 /* check types for comparison or substraction of pointers */
1453 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1455 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1458 /* null pointers are accepted for all comparisons as gcc */
1459 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1463 bt1
= type1
->t
& VT_BTYPE
;
1464 bt2
= type2
->t
& VT_BTYPE
;
1465 /* accept comparison between pointer and integer with a warning */
1466 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1467 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1468 warning("comparison between pointer and integer");
1472 /* both must be pointers or implicit function pointers */
1473 if (bt1
== VT_PTR
) {
1474 type1
= pointed_type(type1
);
1475 } else if (bt1
!= VT_FUNC
)
1476 goto invalid_operands
;
1478 if (bt2
== VT_PTR
) {
1479 type2
= pointed_type(type2
);
1480 } else if (bt2
!= VT_FUNC
) {
1482 error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1484 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1485 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1489 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1490 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1491 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1492 /* gcc-like error if '-' is used */
1494 goto invalid_operands
;
1496 warning("comparison of distinct pointer types lacks a cast");
1500 /* generic gen_op: handles types problems */
1501 ST_FUNC
void gen_op(int op
)
1503 int u
, t1
, t2
, bt1
, bt2
, t
;
1506 t1
= vtop
[-1].type
.t
;
1507 t2
= vtop
[0].type
.t
;
1508 bt1
= t1
& VT_BTYPE
;
1509 bt2
= t2
& VT_BTYPE
;
1511 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1512 /* at least one operand is a pointer */
1513 /* relationnal op: must be both pointers */
1514 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1515 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1516 /* pointers are handled are unsigned */
1517 #ifdef TCC_TARGET_X86_64
1518 t
= VT_LLONG
| VT_UNSIGNED
;
1520 t
= VT_INT
| VT_UNSIGNED
;
1524 /* if both pointers, then it must be the '-' op */
1525 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1527 error("cannot use pointers here");
1528 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1529 /* XXX: check that types are compatible */
1530 u
= pointed_size(&vtop
[-1].type
);
1532 /* set to integer type */
1533 #ifdef TCC_TARGET_X86_64
1534 vtop
->type
.t
= VT_LLONG
;
1536 vtop
->type
.t
= VT_INT
;
1541 /* exactly one pointer : must be '+' or '-'. */
1542 if (op
!= '-' && op
!= '+')
1543 error("cannot use pointers here");
1544 /* Put pointer as first operand */
1545 if (bt2
== VT_PTR
) {
1549 type1
= vtop
[-1].type
;
1550 type1
.t
&= ~VT_ARRAY
;
1551 u
= pointed_size(&vtop
[-1].type
);
1553 error("unknown array element size");
1554 #ifdef TCC_TARGET_X86_64
1557 /* XXX: cast to int ? (long long case) */
1561 #ifdef CONFIG_TCC_BCHECK
1562 /* if evaluating constant expression, no code should be
1563 generated, so no bound check */
1564 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1565 /* if bounded pointers, we generate a special code to
1572 gen_bounded_ptr_add();
1578 /* put again type if gen_opic() swaped operands */
1581 } else if (is_float(bt1
) || is_float(bt2
)) {
1582 /* compute bigger type and do implicit casts */
1583 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1585 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1590 /* floats can only be used for a few operations */
1591 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1592 (op
< TOK_ULT
|| op
> TOK_GT
))
1593 error("invalid operands for binary operation");
1595 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1596 /* cast to biggest op */
1598 /* convert to unsigned if it does not fit in a long long */
1599 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1600 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1604 /* integer operations */
1606 /* convert to unsigned if it does not fit in an integer */
1607 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1608 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1611 /* XXX: currently, some unsigned operations are explicit, so
1612 we modify them here */
1613 if (t
& VT_UNSIGNED
) {
1620 else if (op
== TOK_LT
)
1622 else if (op
== TOK_GT
)
1624 else if (op
== TOK_LE
)
1626 else if (op
== TOK_GE
)
1633 /* special case for shifts and long long: we keep the shift as
1635 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1642 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1643 /* relationnal op: the result is an int */
1644 vtop
->type
.t
= VT_INT
;
1651 #ifndef TCC_TARGET_ARM
1652 /* generic itof for unsigned long long case */
1653 static void gen_cvt_itof1(int t
)
1655 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1656 (VT_LLONG
| VT_UNSIGNED
)) {
1659 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1660 #if LDOUBLE_SIZE != 8
1661 else if (t
== VT_LDOUBLE
)
1662 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1665 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1669 vtop
->r
= reg_fret(t
);
1676 /* generic ftoi for unsigned long long case */
1677 static void gen_cvt_ftoi1(int t
)
1681 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1682 /* not handled natively */
1683 st
= vtop
->type
.t
& VT_BTYPE
;
1685 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1686 #if LDOUBLE_SIZE != 8
1687 else if (st
== VT_LDOUBLE
)
1688 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1691 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1696 vtop
->r2
= REG_LRET
;
1702 /* force char or short cast */
1703 static void force_charshort_cast(int t
)
1707 /* XXX: add optimization if lvalue : just change type and offset */
1712 if (t
& VT_UNSIGNED
) {
1713 vpushi((1 << bits
) - 1);
1719 /* result must be signed or the SAR is converted to an SHL
1720 This was not the case when "t" was a signed short
1721 and the last value on the stack was an unsigned int */
1722 vtop
->type
.t
&= ~VT_UNSIGNED
;
1728 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1729 static void gen_cast(CType
*type
)
1731 int sbt
, dbt
, sf
, df
, c
, p
;
1733 /* special delayed cast for char/short */
1734 /* XXX: in some cases (multiple cascaded casts), it may still
1736 if (vtop
->r
& VT_MUSTCAST
) {
1737 vtop
->r
&= ~VT_MUSTCAST
;
1738 force_charshort_cast(vtop
->type
.t
);
1741 /* bitfields first get cast to ints */
1742 if (vtop
->type
.t
& VT_BITFIELD
) {
1746 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1747 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1752 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1753 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1755 /* constant case: we can do it now */
1756 /* XXX: in ISOC, cannot do it if error in convert */
1757 if (sbt
== VT_FLOAT
)
1758 vtop
->c
.ld
= vtop
->c
.f
;
1759 else if (sbt
== VT_DOUBLE
)
1760 vtop
->c
.ld
= vtop
->c
.d
;
1763 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1764 if (sbt
& VT_UNSIGNED
)
1765 vtop
->c
.ld
= vtop
->c
.ull
;
1767 vtop
->c
.ld
= vtop
->c
.ll
;
1769 if (sbt
& VT_UNSIGNED
)
1770 vtop
->c
.ld
= vtop
->c
.ui
;
1772 vtop
->c
.ld
= vtop
->c
.i
;
1775 if (dbt
== VT_FLOAT
)
1776 vtop
->c
.f
= (float)vtop
->c
.ld
;
1777 else if (dbt
== VT_DOUBLE
)
1778 vtop
->c
.d
= (double)vtop
->c
.ld
;
1779 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1780 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1781 } else if (sf
&& dbt
== VT_BOOL
) {
1782 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1785 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1786 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1787 vtop
->c
.ll
= vtop
->c
.ull
;
1788 else if (sbt
& VT_UNSIGNED
)
1789 vtop
->c
.ll
= vtop
->c
.ui
;
1790 #ifdef TCC_TARGET_X86_64
1791 else if (sbt
== VT_PTR
)
1794 else if (sbt
!= VT_LLONG
)
1795 vtop
->c
.ll
= vtop
->c
.i
;
1797 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1798 vtop
->c
.ull
= vtop
->c
.ll
;
1799 else if (dbt
== VT_BOOL
)
1800 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1801 else if (dbt
!= VT_LLONG
) {
1803 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1805 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1808 if(dbt
& VT_UNSIGNED
)
1809 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1811 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1814 } else if (p
&& dbt
== VT_BOOL
) {
1817 } else if (!nocode_wanted
) {
1818 /* non constant case: generate code */
1820 /* convert from fp to fp */
1823 /* convert int to fp */
1826 /* convert fp to int */
1827 if (dbt
== VT_BOOL
) {
1831 /* we handle char/short/etc... with generic code */
1832 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1833 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1837 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1838 /* additional cast for char/short... */
1843 #ifndef TCC_TARGET_X86_64
1844 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1845 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1846 /* scalar to long long */
1847 /* machine independent conversion */
1849 /* generate high word */
1850 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
1854 if (sbt
== VT_PTR
) {
1855 /* cast from pointer to int before we apply
1856 shift operation, which pointers don't support*/
1857 gen_cast(&int_type
);
1863 /* patch second register */
1864 vtop
[-1].r2
= vtop
->r
;
1868 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
1869 (dbt
& VT_BTYPE
) == VT_PTR
) {
1870 /* XXX: not sure if this is perfect... need more tests */
1871 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1873 if (sbt
!= (VT_INT
| VT_UNSIGNED
) &&
1874 sbt
!= VT_PTR
&& sbt
!= VT_FUNC
) {
1875 /* x86_64 specific: movslq */
1877 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
1881 } else if (dbt
== VT_BOOL
) {
1882 /* scalar to bool */
1885 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
1886 (dbt
& VT_BTYPE
) == VT_SHORT
) {
1887 if (sbt
== VT_PTR
) {
1888 vtop
->type
.t
= VT_INT
;
1889 warning("nonportable conversion from pointer to char/short");
1891 force_charshort_cast(dbt
);
1892 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
1894 if (sbt
== VT_LLONG
) {
1895 /* from long long: just take low order word */
1899 /* if lvalue and single word type, nothing to do because
1900 the lvalue already contains the real type size (see
1901 VT_LVAL_xxx constants) */
1904 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
1905 /* if we are casting between pointer types,
1906 we must update the VT_LVAL_xxx size */
1907 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
1908 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
1913 /* return type size. Put alignment at 'a' */
1914 ST_FUNC
int type_size(CType
*type
, int *a
)
1919 bt
= type
->t
& VT_BTYPE
;
1920 if (bt
== VT_STRUCT
) {
1925 } else if (bt
== VT_PTR
) {
1926 if (type
->t
& VT_ARRAY
) {
1930 ts
= type_size(&s
->type
, a
);
1932 if (ts
< 0 && s
->c
< 0)
1940 } else if (bt
== VT_LDOUBLE
) {
1942 return LDOUBLE_SIZE
;
1943 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
1944 #ifdef TCC_TARGET_I386
1945 #ifdef TCC_TARGET_PE
1950 #elif defined(TCC_TARGET_ARM)
1960 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
1963 } else if (bt
== VT_SHORT
) {
1967 /* char, void, function, _Bool */
1973 /* return the pointed type of t */
1974 static inline CType
*pointed_type(CType
*type
)
1976 return &type
->ref
->type
;
1979 /* modify type so that its it is a pointer to type. */
1980 ST_FUNC
void mk_pointer(CType
*type
)
1983 s
= sym_push(SYM_FIELD
, type
, 0, -1);
1984 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
1988 /* compare function types. OLD functions match any new functions */
1989 static int is_compatible_func(CType
*type1
, CType
*type2
)
1995 if (!is_compatible_types(&s1
->type
, &s2
->type
))
1997 /* check func_call */
1998 if (FUNC_CALL(s1
->r
) != FUNC_CALL(s2
->r
))
2000 /* XXX: not complete */
2001 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2005 while (s1
!= NULL
) {
2008 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2018 /* return true if type1 and type2 are the same. If unqualified is
2019 true, qualifiers on the types are ignored.
2021 - enums are not checked as gcc __builtin_types_compatible_p ()
2023 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2027 t1
= type1
->t
& VT_TYPE
;
2028 t2
= type2
->t
& VT_TYPE
;
2030 /* strip qualifiers before comparing */
2031 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2032 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2034 /* XXX: bitfields ? */
2037 /* test more complicated cases */
2038 bt1
= t1
& VT_BTYPE
;
2039 if (bt1
== VT_PTR
) {
2040 type1
= pointed_type(type1
);
2041 type2
= pointed_type(type2
);
2042 return is_compatible_types(type1
, type2
);
2043 } else if (bt1
== VT_STRUCT
) {
2044 return (type1
->ref
== type2
->ref
);
2045 } else if (bt1
== VT_FUNC
) {
2046 return is_compatible_func(type1
, type2
);
2052 /* return true if type1 and type2 are exactly the same (including
2055 static int is_compatible_types(CType
*type1
, CType
*type2
)
2057 return compare_types(type1
,type2
,0);
2060 /* return true if type1 and type2 are the same (ignoring qualifiers).
2062 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2064 return compare_types(type1
,type2
,1);
2067 /* print a type. If 'varstr' is not NULL, then the variable is also
2068 printed in the type */
2070 /* XXX: add array and function pointers */
2071 static void type_to_str(char *buf
, int buf_size
,
2072 CType
*type
, const char *varstr
)
2079 t
= type
->t
& VT_TYPE
;
2082 if (t
& VT_CONSTANT
)
2083 pstrcat(buf
, buf_size
, "const ");
2084 if (t
& VT_VOLATILE
)
2085 pstrcat(buf
, buf_size
, "volatile ");
2086 if (t
& VT_UNSIGNED
)
2087 pstrcat(buf
, buf_size
, "unsigned ");
2117 tstr
= "long double";
2119 pstrcat(buf
, buf_size
, tstr
);
2123 if (bt
== VT_STRUCT
)
2127 pstrcat(buf
, buf_size
, tstr
);
2128 v
= type
->ref
->v
& ~SYM_STRUCT
;
2129 if (v
>= SYM_FIRST_ANOM
)
2130 pstrcat(buf
, buf_size
, "<anonymous>");
2132 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2136 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2137 pstrcat(buf
, buf_size
, "(");
2139 while (sa
!= NULL
) {
2140 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2141 pstrcat(buf
, buf_size
, buf1
);
2144 pstrcat(buf
, buf_size
, ", ");
2146 pstrcat(buf
, buf_size
, ")");
2150 pstrcpy(buf1
, sizeof(buf1
), "*");
2152 pstrcat(buf1
, sizeof(buf1
), varstr
);
2153 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2157 pstrcat(buf
, buf_size
, " ");
2158 pstrcat(buf
, buf_size
, varstr
);
2163 /* verify type compatibility to store vtop in 'dt' type, and generate
2165 static void gen_assign_cast(CType
*dt
)
2167 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2168 char buf1
[256], buf2
[256];
2171 st
= &vtop
->type
; /* source type */
2172 dbt
= dt
->t
& VT_BTYPE
;
2173 sbt
= st
->t
& VT_BTYPE
;
2174 if (dt
->t
& VT_CONSTANT
)
2175 warning("assignment of read-only location");
2178 /* special cases for pointers */
2179 /* '0' can also be a pointer */
2180 if (is_null_pointer(vtop
))
2182 /* accept implicit pointer to integer cast with warning */
2183 if (is_integer_btype(sbt
)) {
2184 warning("assignment makes pointer from integer without a cast");
2187 type1
= pointed_type(dt
);
2188 /* a function is implicitely a function pointer */
2189 if (sbt
== VT_FUNC
) {
2190 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2191 !is_compatible_types(pointed_type(dt
), st
))
2192 warning("assignment from incompatible pointer type");
2197 type2
= pointed_type(st
);
2198 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2199 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2200 /* void * can match anything */
2202 /* exact type match, except for unsigned */
2205 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2206 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2207 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2208 warning("assignment from incompatible pointer type");
2210 /* check const and volatile */
2211 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2212 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2213 warning("assignment discards qualifiers from pointer target type");
2219 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2220 warning("assignment makes integer from pointer without a cast");
2222 /* XXX: more tests */
2227 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2228 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2229 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2231 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2232 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2233 error("cannot cast '%s' to '%s'", buf1
, buf2
);
2241 /* store vtop in lvalue pushed on stack */
2242 ST_FUNC
void vstore(void)
2244 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2246 ft
= vtop
[-1].type
.t
;
2247 sbt
= vtop
->type
.t
& VT_BTYPE
;
2248 dbt
= ft
& VT_BTYPE
;
2249 if (((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2250 (sbt
== VT_INT
&& dbt
== VT_SHORT
)) {
2251 /* optimize char/short casts */
2252 delayed_cast
= VT_MUSTCAST
;
2253 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2254 /* XXX: factorize */
2255 if (ft
& VT_CONSTANT
)
2256 warning("assignment of read-only location");
2259 if (!(ft
& VT_BITFIELD
))
2260 gen_assign_cast(&vtop
[-1].type
);
2263 if (sbt
== VT_STRUCT
) {
2264 /* if structure, only generate pointer */
2265 /* structure assignment : generate memcpy */
2266 /* XXX: optimize if small size */
2267 if (!nocode_wanted
) {
2268 size
= type_size(&vtop
->type
, &align
);
2272 vtop
->type
.t
= VT_PTR
;
2275 /* address of memcpy() */
2278 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2279 else if(!(align
& 3))
2280 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2283 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2288 vtop
->type
.t
= VT_PTR
;
2297 /* leave source on stack */
2298 } else if (ft
& VT_BITFIELD
) {
2299 /* bitfield store handling */
2300 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2301 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2302 /* remove bit field info to avoid loops */
2303 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2305 /* duplicate source into other register */
2310 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2311 gen_cast(&vtop
[-1].type
);
2312 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2315 /* duplicate destination */
2317 vtop
[-1] = vtop
[-2];
2319 /* mask and shift source */
2320 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2321 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2322 vpushll((1ULL << bit_size
) - 1ULL);
2324 vpushi((1 << bit_size
) - 1);
2330 /* load destination, mask and or with source */
2332 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2333 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2335 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2342 /* pop off shifted source from "duplicate source..." above */
2346 #ifdef CONFIG_TCC_BCHECK
2347 /* bound check case */
2348 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2354 if (!nocode_wanted
) {
2358 #ifdef TCC_TARGET_X86_64
2359 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2364 r
= gv(rc
); /* generate value */
2365 /* if lvalue was saved on stack, must read it */
2366 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2368 t
= get_reg(RC_INT
);
2369 #ifdef TCC_TARGET_X86_64
2374 sv
.r
= VT_LOCAL
| VT_LVAL
;
2375 sv
.c
.ul
= vtop
[-1].c
.ul
;
2377 vtop
[-1].r
= t
| VT_LVAL
;
2380 #ifndef TCC_TARGET_X86_64
2381 /* two word case handling : store second register at word + 4 */
2382 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2384 /* convert to int to increment easily */
2385 vtop
->type
.t
= VT_INT
;
2391 /* XXX: it works because r2 is spilled last ! */
2392 store(vtop
->r2
, vtop
- 1);
2397 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2398 vtop
->r
|= delayed_cast
;
2402 /* post defines POST/PRE add. c is the token ++ or -- */
2403 ST_FUNC
void inc(int post
, int c
)
2406 vdup(); /* save lvalue */
2408 gv_dup(); /* duplicate value */
2413 vpushi(c
- TOK_MID
);
2415 vstore(); /* store value */
2417 vpop(); /* if post op, return saved value */
2420 /* Parse GNUC __attribute__ extension. Currently, the following
2421 extensions are recognized:
2422 - aligned(n) : set data/function alignment.
2423 - packed : force data alignment to 1
2424 - section(x) : generate data/code in this section.
2425 - unused : currently ignored, but may be used someday.
2426 - regparm(n) : pass function parameters in registers (i386 only)
2428 static void parse_attribute(AttributeDef
*ad
)
2432 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2436 while (tok
!= ')') {
2437 if (tok
< TOK_IDENT
)
2438 expect("attribute name");
2446 expect("section name");
2447 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2456 if (n
<= 0 || (n
& (n
- 1)) != 0)
2457 error("alignment must be a positive power of two");
2474 /* currently, no need to handle it because tcc does not
2475 track unused objects */
2479 /* currently, no need to handle it because tcc does not
2480 track unused objects */
2485 ad
->func_call
= FUNC_CDECL
;
2490 ad
->func_call
= FUNC_STDCALL
;
2492 #ifdef TCC_TARGET_I386
2502 ad
->func_call
= FUNC_FASTCALL1
+ n
- 1;
2508 ad
->func_call
= FUNC_FASTCALLW
;
2515 ad
->mode
= VT_LLONG
+ 1;
2518 ad
->mode
= VT_SHORT
+ 1;
2521 ad
->mode
= VT_INT
+ 1;
2524 warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2531 ad
->func_export
= 1;
2534 ad
->func_import
= 1;
2537 if (tcc_state
->warn_unsupported
)
2538 warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2539 /* skip parameters */
2541 int parenthesis
= 0;
2545 else if (tok
== ')')
2548 } while (parenthesis
&& tok
!= -1);
2561 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2562 static void struct_decl(CType
*type
, int u
)
2564 int a
, v
, size
, align
, maxalign
, c
, offset
;
2565 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2566 Sym
*s
, *ss
, *ass
, **ps
;
2570 a
= tok
; /* save decl type */
2575 /* struct already defined ? return it */
2577 expect("struct/union/enum name");
2581 error("invalid type");
2588 /* we put an undefined size for struct/union */
2589 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2590 s
->r
= 0; /* default alignment is zero as gcc */
2591 /* put struct/union/enum name in type */
2599 error("struct/union/enum already defined");
2600 /* cannot be empty */
2602 /* non empty enums are not allowed */
2603 if (a
== TOK_ENUM
) {
2607 expect("identifier");
2613 /* enum symbols have static storage */
2614 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2615 ss
->type
.t
|= VT_STATIC
;
2620 /* NOTE: we accept a trailing comma */
2631 while (tok
!= '}') {
2632 parse_btype(&btype
, &ad
);
2638 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2639 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2640 expect("identifier");
2641 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2642 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2643 error("invalid type for '%s'",
2644 get_tok_str(v
, NULL
));
2648 bit_size
= expr_const();
2649 /* XXX: handle v = 0 case for messages */
2651 error("negative width in bit-field '%s'",
2652 get_tok_str(v
, NULL
));
2653 if (v
&& bit_size
== 0)
2654 error("zero width for bit-field '%s'",
2655 get_tok_str(v
, NULL
));
2657 size
= type_size(&type1
, &align
);
2659 if (align
< ad
.aligned
)
2661 } else if (ad
.packed
) {
2663 } else if (*tcc_state
->pack_stack_ptr
) {
2664 if (align
> *tcc_state
->pack_stack_ptr
)
2665 align
= *tcc_state
->pack_stack_ptr
;
2668 if (bit_size
>= 0) {
2669 bt
= type1
.t
& VT_BTYPE
;
2676 error("bitfields must have scalar type");
2678 if (bit_size
> bsize
) {
2679 error("width of '%s' exceeds its type",
2680 get_tok_str(v
, NULL
));
2681 } else if (bit_size
== bsize
) {
2682 /* no need for bit fields */
2684 } else if (bit_size
== 0) {
2685 /* XXX: what to do if only padding in a
2687 /* zero size: means to pad */
2690 /* we do not have enough room ?
2691 did the type change?
2693 if ((bit_pos
+ bit_size
) > bsize
||
2694 bt
!= prevbt
|| a
== TOK_UNION
)
2697 /* XXX: handle LSB first */
2698 type1
.t
|= VT_BITFIELD
|
2699 (bit_pos
<< VT_STRUCT_SHIFT
) |
2700 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2701 bit_pos
+= bit_size
;
2707 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2708 /* add new memory data only if starting
2710 if (lbit_pos
== 0) {
2711 if (a
== TOK_STRUCT
) {
2712 c
= (c
+ align
- 1) & -align
;
2721 if (align
> maxalign
)
2725 printf("add field %s offset=%d",
2726 get_tok_str(v
, NULL
), offset
);
2727 if (type1
.t
& VT_BITFIELD
) {
2728 printf(" pos=%d size=%d",
2729 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2730 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2735 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2737 while ((ass
= ass
->next
) != NULL
) {
2738 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2743 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2747 if (tok
== ';' || tok
== TOK_EOF
)
2754 /* store size and alignment */
2755 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2761 /* return 0 if no type declaration. otherwise, return the basic type
2764 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2766 int t
, u
, type_found
, typespec_found
, typedef_found
;
2770 memset(ad
, 0, sizeof(AttributeDef
));
2778 /* currently, we really ignore extension */
2788 if ((t
& VT_BTYPE
) != 0)
2789 error("too many basic types");
2805 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
2806 #ifndef TCC_TARGET_PE
2807 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2809 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
2810 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2824 if ((t
& VT_BTYPE
) == VT_LONG
) {
2825 #ifdef TCC_TARGET_PE
2826 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
2828 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2836 struct_decl(&type1
, VT_ENUM
);
2839 type
->ref
= type1
.ref
;
2843 struct_decl(&type1
, VT_STRUCT
);
2846 /* type modifiers */
2899 /* GNUC attribute */
2900 case TOK_ATTRIBUTE1
:
2901 case TOK_ATTRIBUTE2
:
2902 parse_attribute(ad
);
2905 t
= (t
& ~VT_BTYPE
) | u
;
2913 parse_expr_type(&type1
);
2916 if (typespec_found
|| typedef_found
)
2919 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
2922 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
2923 type
->ref
= s
->type
.ref
;
2925 /* get attributes from typedef */
2926 if (0 == ad
->aligned
)
2927 ad
->aligned
= FUNC_ALIGN(s
->r
);
2928 if (0 == ad
->func_call
)
2929 ad
->func_call
= FUNC_CALL(s
->r
);
2930 ad
->packed
|= FUNC_PACKED(s
->r
);
2939 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
2940 error("signed and unsigned modifier");
2941 if (tcc_state
->char_is_unsigned
) {
2942 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
2947 /* long is never used as type */
2948 if ((t
& VT_BTYPE
) == VT_LONG
)
2949 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
2950 t
= (t
& ~VT_BTYPE
) | VT_INT
;
2952 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2958 /* convert a function parameter type (array to pointer and function to
2959 function pointer) */
2960 static inline void convert_parameter_type(CType
*pt
)
2962 /* remove const and volatile qualifiers (XXX: const could be used
2963 to indicate a const function parameter */
2964 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2965 /* array must be transformed to pointer according to ANSI C */
2967 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
2972 static void post_type(CType
*type
, AttributeDef
*ad
)
2974 int n
, l
, t1
, arg_size
, align
;
2975 Sym
**plast
, *s
, *first
;
2980 /* function declaration */
2988 /* read param name and compute offset */
2989 if (l
!= FUNC_OLD
) {
2990 if (!parse_btype(&pt
, &ad1
)) {
2992 error("invalid type");
2999 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3001 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3002 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3003 error("parameter declared as void");
3004 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3009 expect("identifier");
3013 convert_parameter_type(&pt
);
3014 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3020 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3027 /* if no parameters, then old type prototype */
3031 t1
= type
->t
& VT_STORAGE
;
3032 /* NOTE: const is ignored in returned type as it has a special
3033 meaning in gcc / C++ */
3034 type
->t
&= ~(VT_STORAGE
| VT_CONSTANT
);
3035 post_type(type
, ad
);
3036 /* we push a anonymous symbol which will contain the function prototype */
3037 ad
->func_args
= arg_size
;
3038 s
= sym_push(SYM_FIELD
, type
, INT_ATTR(ad
), l
);
3040 type
->t
= t1
| VT_FUNC
;
3042 } else if (tok
== '[') {
3043 /* array definition */
3045 if (tok
== TOK_RESTRICT1
)
3051 error("invalid array size");
3054 /* parse next post type */
3055 t1
= type
->t
& VT_STORAGE
;
3056 type
->t
&= ~VT_STORAGE
;
3057 post_type(type
, ad
);
3059 /* we push a anonymous symbol which will contain the array
3061 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3062 type
->t
= t1
| VT_ARRAY
| VT_PTR
;
3067 /* Parse a type declaration (except basic type), and return the type
3068 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3069 expected. 'type' should contain the basic type. 'ad' is the
3070 attribute definition of the basic type. It can be modified by
3073 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3076 CType type1
, *type2
;
3079 while (tok
== '*') {
3087 qualifiers
|= VT_CONSTANT
;
3092 qualifiers
|= VT_VOLATILE
;
3100 type
->t
|= qualifiers
;
3103 /* XXX: clarify attribute handling */
3104 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3105 parse_attribute(ad
);
3107 /* recursive type */
3108 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3109 type1
.t
= 0; /* XXX: same as int */
3112 /* XXX: this is not correct to modify 'ad' at this point, but
3113 the syntax is not clear */
3114 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3115 parse_attribute(ad
);
3116 type_decl(&type1
, ad
, v
, td
);
3119 /* type identifier */
3120 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3124 if (!(td
& TYPE_ABSTRACT
))
3125 expect("identifier");
3129 post_type(type
, ad
);
3130 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3131 parse_attribute(ad
);
3134 /* append type at the end of type1 */
3147 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3148 ST_FUNC
int lvalue_type(int t
)
3153 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3155 else if (bt
== VT_SHORT
)
3159 if (t
& VT_UNSIGNED
)
3160 r
|= VT_LVAL_UNSIGNED
;
3164 /* indirection with full error checking and bound check */
3165 ST_FUNC
void indir(void)
3167 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3168 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3172 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3174 vtop
->type
= *pointed_type(&vtop
->type
);
3175 /* Arrays and functions are never lvalues */
3176 if (!(vtop
->type
.t
& VT_ARRAY
)
3177 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3178 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3179 /* if bound checking, the referenced pointer must be checked */
3180 #ifdef CONFIG_TCC_BCHECK
3181 if (tcc_state
->do_bounds_check
)
3182 vtop
->r
|= VT_MUSTBOUND
;
3187 /* pass a parameter to a function and do type checking and casting */
3188 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3193 func_type
= func
->c
;
3194 if (func_type
== FUNC_OLD
||
3195 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3196 /* default casting : only need to convert float to double */
3197 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3201 } else if (arg
== NULL
) {
3202 error("too many arguments to function");
3205 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3206 gen_assign_cast(&type
);
3210 /* parse an expression of the form '(type)' or '(expr)' and return its
3212 static void parse_expr_type(CType
*type
)
3218 if (parse_btype(type
, &ad
)) {
3219 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3226 static void parse_type(CType
*type
)
3231 if (!parse_btype(type
, &ad
)) {
3234 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3237 static void vpush_tokc(int t
)
3242 vsetc(&type
, VT_CONST
, &tokc
);
3245 ST_FUNC
void unary(void)
3247 int n
, t
, align
, size
, r
;
3252 /* XXX: GCC 2.95.3 does not generate a table although it should be
3266 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3270 vpush_tokc(VT_LLONG
);
3274 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3278 vpush_tokc(VT_FLOAT
);
3282 vpush_tokc(VT_DOUBLE
);
3286 vpush_tokc(VT_LDOUBLE
);
3289 case TOK___FUNCTION__
:
3291 goto tok_identifier
;
3297 /* special function name identifier */
3298 len
= strlen(funcname
) + 1;
3299 /* generate char[len] type */
3304 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3305 ptr
= section_ptr_add(data_section
, len
);
3306 memcpy(ptr
, funcname
, len
);
3311 #ifdef TCC_TARGET_PE
3312 t
= VT_SHORT
| VT_UNSIGNED
;
3318 /* string parsing */
3321 if (tcc_state
->warn_write_strings
)
3326 memset(&ad
, 0, sizeof(AttributeDef
));
3327 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
3332 if (parse_btype(&type
, &ad
)) {
3333 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3335 /* check ISOC99 compound literal */
3337 /* data is allocated locally by default */
3342 /* all except arrays are lvalues */
3343 if (!(type
.t
& VT_ARRAY
))
3344 r
|= lvalue_type(type
.t
);
3345 memset(&ad
, 0, sizeof(AttributeDef
));
3346 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
3351 } else if (tok
== '{') {
3352 /* save all registers */
3354 /* statement expression : we do not accept break/continue
3355 inside as GCC does */
3356 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3371 /* functions names must be treated as function pointers,
3372 except for unary '&' and sizeof. Since we consider that
3373 functions are not lvalues, we only have to handle it
3374 there and in function calls. */
3375 /* arrays can also be used although they are not lvalues */
3376 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3377 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3379 mk_pointer(&vtop
->type
);
3385 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3387 boolean
.t
= VT_BOOL
;
3389 vtop
->c
.i
= !vtop
->c
.i
;
3390 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3391 vtop
->c
.i
= vtop
->c
.i
^ 1;
3394 vseti(VT_JMP
, gtst(1, 0));
3405 /* in order to force cast, we add zero */
3407 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3408 error("pointer not accepted for unary plus");
3418 parse_expr_type(&type
);
3422 size
= type_size(&type
, &align
);
3423 if (t
== TOK_SIZEOF
) {
3425 error("sizeof applied to an incomplete type");
3430 vtop
->type
.t
|= VT_UNSIGNED
;
3433 case TOK_builtin_types_compatible_p
:
3442 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3443 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3444 vpushi(is_compatible_types(&type1
, &type2
));
3447 case TOK_builtin_constant_p
:
3449 int saved_nocode_wanted
, res
;
3452 saved_nocode_wanted
= nocode_wanted
;
3455 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3457 nocode_wanted
= saved_nocode_wanted
;
3462 case TOK_builtin_frame_address
:
3467 if (tok
!= TOK_CINT
) {
3468 error("__builtin_frame_address only takes integers");
3471 error("TCC only supports __builtin_frame_address(0)");
3477 vset(&type
, VT_LOCAL
, 0);
3480 #ifdef TCC_TARGET_X86_64
3481 case TOK_builtin_malloc
:
3483 goto tok_identifier
;
3484 case TOK_builtin_free
:
3486 goto tok_identifier
;
3503 goto tok_identifier
;
3505 /* allow to take the address of a label */
3506 if (tok
< TOK_UIDENT
)
3507 expect("label identifier");
3508 s
= label_find(tok
);
3510 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3512 if (s
->r
== LABEL_DECLARED
)
3513 s
->r
= LABEL_FORWARD
;
3516 s
->type
.t
= VT_VOID
;
3517 mk_pointer(&s
->type
);
3518 s
->type
.t
|= VT_STATIC
;
3520 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3529 expect("identifier");
3533 error("'%s' undeclared", get_tok_str(t
, NULL
));
3534 /* for simple function calls, we tolerate undeclared
3535 external reference to int() function */
3536 if (tcc_state
->warn_implicit_function_declaration
)
3537 warning("implicit declaration of function '%s'",
3538 get_tok_str(t
, NULL
));
3539 s
= external_global_sym(t
, &func_old_type
, 0);
3541 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3542 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3543 /* if referencing an inline function, then we generate a
3544 symbol to it if not already done. It will have the
3545 effect to generate code for it at the end of the
3546 compilation unit. Inline function as always
3547 generated in the text section. */
3549 put_extern_sym(s
, text_section
, 0, 0);
3550 r
= VT_SYM
| VT_CONST
;
3554 vset(&s
->type
, r
, s
->c
);
3555 /* if forward reference, we must point to s */
3556 if (vtop
->r
& VT_SYM
) {
3563 /* post operations */
3565 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3568 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3571 if (tok
== TOK_ARROW
)
3573 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3577 /* expect pointer on structure */
3578 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3579 expect("struct or union");
3583 while ((s
= s
->next
) != NULL
) {
3588 error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3589 /* add field offset to pointer */
3590 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3593 /* change type to field type, and set to lvalue */
3594 vtop
->type
= s
->type
;
3595 vtop
->type
.t
|= qualifiers
;
3596 /* an array is never an lvalue */
3597 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3598 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3599 #ifdef CONFIG_TCC_BCHECK
3600 /* if bound checking, the referenced pointer must be checked */
3601 if (tcc_state
->do_bounds_check
)
3602 vtop
->r
|= VT_MUSTBOUND
;
3606 } else if (tok
== '[') {
3612 } else if (tok
== '(') {
3618 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3619 /* pointer test (no array accepted) */
3620 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3621 vtop
->type
= *pointed_type(&vtop
->type
);
3622 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3626 expect("function pointer");
3629 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3631 /* get return type */
3634 sa
= s
->next
; /* first parameter */
3637 /* compute first implicit argument if a structure is returned */
3638 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3639 /* get some space for the returned structure */
3640 size
= type_size(&s
->type
, &align
);
3641 loc
= (loc
- size
) & -align
;
3643 ret
.r
= VT_LOCAL
| VT_LVAL
;
3644 /* pass it as 'int' to avoid structure arg passing
3646 vseti(VT_LOCAL
, loc
);
3651 /* return in register */
3652 if (is_float(ret
.type
.t
)) {
3653 ret
.r
= reg_fret(ret
.type
.t
);
3655 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
3664 gfunc_param_typed(s
, sa
);
3674 error("too few arguments to function");
3676 if (!nocode_wanted
) {
3677 gfunc_call(nb_args
);
3679 vtop
-= (nb_args
+ 1);
3682 vsetc(&ret
.type
, ret
.r
, &ret
.c
);
3690 static void uneq(void)
3696 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
3697 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
3698 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
3713 ST_FUNC
void expr_prod(void)
3718 while (tok
== '*' || tok
== '/' || tok
== '%') {
3726 ST_FUNC
void expr_sum(void)
3731 while (tok
== '+' || tok
== '-') {
3739 static void expr_shift(void)
3744 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
3752 static void expr_cmp(void)
3757 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
3758 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
3766 static void expr_cmpeq(void)
3771 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
3779 static void expr_and(void)
3782 while (tok
== '&') {
3789 static void expr_xor(void)
3792 while (tok
== '^') {
3799 static void expr_or(void)
3802 while (tok
== '|') {
3809 /* XXX: fix this mess */
3810 static void expr_land_const(void)
3813 while (tok
== TOK_LAND
) {
3820 /* XXX: fix this mess */
3821 static void expr_lor_const(void)
3824 while (tok
== TOK_LOR
) {
3831 /* only used if non constant */
3832 static void expr_land(void)
3837 if (tok
== TOK_LAND
) {
3842 if (tok
!= TOK_LAND
) {
3852 static void expr_lor(void)
3857 if (tok
== TOK_LOR
) {
3862 if (tok
!= TOK_LOR
) {
3872 /* XXX: better constant handling */
3873 static void expr_eq(void)
3875 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
3877 CType type
, type1
, type2
;
3884 boolean
.t
= VT_BOOL
;
3890 if (tok
!= ':' || !gnu_ext
) {
3905 if (vtop
!= vstack
) {
3906 /* needed to avoid having different registers saved in
3908 if (is_float(vtop
->type
.t
)) {
3910 #ifdef TCC_TARGET_X86_64
3911 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
3921 if (tok
== ':' && gnu_ext
) {
3929 sv
= *vtop
; /* save value to handle it later */
3930 vtop
--; /* no vpop so that FP stack is not flushed */
3938 bt1
= t1
& VT_BTYPE
;
3940 bt2
= t2
& VT_BTYPE
;
3941 /* cast operands to correct type according to ISOC rules */
3942 if (is_float(bt1
) || is_float(bt2
)) {
3943 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
3944 type
.t
= VT_LDOUBLE
;
3945 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
3950 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
3951 /* cast to biggest op */
3953 /* convert to unsigned if it does not fit in a long long */
3954 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
3955 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
3956 type
.t
|= VT_UNSIGNED
;
3957 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
3958 /* XXX: test pointer compatibility */
3960 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
3961 /* XXX: test function pointer compatibility */
3963 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
3964 /* XXX: test structure compatibility */
3966 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
3967 /* NOTE: as an extension, we accept void on only one side */
3970 /* integer operations */
3972 /* convert to unsigned if it does not fit in an integer */
3973 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
3974 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
3975 type
.t
|= VT_UNSIGNED
;
3978 /* now we convert second operand */
3980 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
3983 if (is_float(type
.t
)) {
3985 #ifdef TCC_TARGET_X86_64
3986 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
3990 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
3991 /* for long longs, we use fixed registers to avoid having
3992 to handle a complicated move */
3997 /* this is horrible, but we must also convert first
4001 /* put again first value and cast it */
4004 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4014 ST_FUNC
void gexpr(void)
4025 /* parse an expression and return its type without any side effect. */
4026 static void expr_type(CType
*type
)
4028 int saved_nocode_wanted
;
4030 saved_nocode_wanted
= nocode_wanted
;
4035 nocode_wanted
= saved_nocode_wanted
;
4038 /* parse a unary expression and return its type without any side
4040 static void unary_type(CType
*type
)
4052 /* parse a constant expression and return value in vtop. */
4053 static void expr_const1(void)
4062 /* parse an integer constant and return its value. */
4063 ST_FUNC
int expr_const(void)
4067 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4068 expect("constant expression");
4074 /* return the label token if current token is a label, otherwise
4076 static int is_label(void)
4080 /* fast test first */
4081 if (tok
< TOK_UIDENT
)
4083 /* no need to save tokc because tok is an identifier */
4090 unget_tok(last_tok
);
4095 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4096 int case_reg
, int is_expr
)
4101 /* generate line number info */
4102 if (tcc_state
->do_debug
&&
4103 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4104 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4106 last_line_num
= file
->line_num
;
4110 /* default return value is (void) */
4112 vtop
->type
.t
= VT_VOID
;
4115 if (tok
== TOK_IF
) {
4122 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4124 if (c
== TOK_ELSE
) {
4128 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4129 gsym(d
); /* patch else jmp */
4132 } else if (tok
== TOK_WHILE
) {
4140 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4144 } else if (tok
== '{') {
4148 /* record local declaration stack position */
4150 llabel
= local_label_stack
;
4151 /* handle local labels declarations */
4152 if (tok
== TOK_LABEL
) {
4155 if (tok
< TOK_UIDENT
)
4156 expect("label identifier");
4157 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4167 while (tok
!= '}') {
4172 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4175 /* pop locally defined labels */
4176 label_pop(&local_label_stack
, llabel
);
4177 /* pop locally defined symbols */
4179 /* XXX: this solution makes only valgrind happy...
4180 triggered by gcc.c-torture/execute/20000917-1.c */
4182 switch(vtop
->type
.t
& VT_BTYPE
) {
4187 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4189 error("unsupported expression type");
4192 sym_pop(&local_stack
, s
);
4194 } else if (tok
== TOK_RETURN
) {
4198 gen_assign_cast(&func_vt
);
4199 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4201 /* if returning structure, must copy it to implicit
4202 first pointer arg location */
4205 size
= type_size(&func_vt
,&align
);
4208 if((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& 3))
4212 loc
= (loc
- size
) & -4;
4215 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4218 vset(&int_type
, VT_LOCAL
| VT_LVAL
, addr
);
4220 vtop
->type
= int_type
;
4226 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4229 /* copy structure value to pointer */
4234 } else if (is_float(func_vt
.t
)) {
4235 gv(rc_fret(func_vt
.t
));
4239 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4242 rsym
= gjmp(rsym
); /* jmp */
4243 } else if (tok
== TOK_BREAK
) {
4246 error("cannot break");
4247 *bsym
= gjmp(*bsym
);
4250 } else if (tok
== TOK_CONTINUE
) {
4253 error("cannot continue");
4254 *csym
= gjmp(*csym
);
4257 } else if (tok
== TOK_FOR
) {
4284 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4289 if (tok
== TOK_DO
) {
4294 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4305 if (tok
== TOK_SWITCH
) {
4309 /* XXX: other types than integer */
4310 case_reg
= gv(RC_INT
);
4314 b
= gjmp(0); /* jump to first case */
4316 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4317 /* if no default, jmp after switch */
4325 if (tok
== TOK_CASE
) {
4332 if (gnu_ext
&& tok
== TOK_DOTS
) {
4336 warning("empty case range");
4338 /* since a case is like a label, we must skip it with a jmp */
4345 *case_sym
= gtst(1, 0);
4348 *case_sym
= gtst(1, 0);
4352 *case_sym
= gtst(1, *case_sym
);
4357 goto block_after_label
;
4359 if (tok
== TOK_DEFAULT
) {
4365 error("too many 'default'");
4368 goto block_after_label
;
4370 if (tok
== TOK_GOTO
) {
4372 if (tok
== '*' && gnu_ext
) {
4376 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4379 } else if (tok
>= TOK_UIDENT
) {
4380 s
= label_find(tok
);
4381 /* put forward definition if needed */
4383 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4385 if (s
->r
== LABEL_DECLARED
)
4386 s
->r
= LABEL_FORWARD
;
4388 /* label already defined */
4389 if (s
->r
& LABEL_FORWARD
)
4390 s
->jnext
= gjmp(s
->jnext
);
4392 gjmp_addr(s
->jnext
);
4395 expect("label identifier");
4398 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4406 if (s
->r
== LABEL_DEFINED
)
4407 error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4409 s
->r
= LABEL_DEFINED
;
4411 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4414 /* we accept this, but it is a mistake */
4417 warning("deprecated use of label at end of compound statement");
4421 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4424 /* expression case */
4439 /* t is the array or struct type. c is the array or struct
4440 address. cur_index/cur_field is the pointer to the current
4441 value. 'size_only' is true if only size info is needed (only used
4443 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4444 int *cur_index
, Sym
**cur_field
,
4448 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4454 if (gnu_ext
&& (l
= is_label()) != 0)
4456 while (tok
== '[' || tok
== '.') {
4458 if (!(type
->t
& VT_ARRAY
))
4459 expect("array type");
4462 index
= expr_const();
4463 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4464 expect("invalid index");
4465 if (tok
== TOK_DOTS
&& gnu_ext
) {
4467 index_last
= expr_const();
4468 if (index_last
< 0 ||
4469 (s
->c
>= 0 && index_last
>= s
->c
) ||
4471 expect("invalid index");
4477 *cur_index
= index_last
;
4478 type
= pointed_type(type
);
4479 elem_size
= type_size(type
, &align
);
4480 c
+= index
* elem_size
;
4481 /* NOTE: we only support ranges for last designator */
4482 nb_elems
= index_last
- index
+ 1;
4483 if (nb_elems
!= 1) {
4492 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4493 expect("struct/union type");
4506 /* XXX: fix this mess by using explicit storage field */
4508 type1
.t
|= (type
->t
& ~VT_TYPE
);
4522 if (type
->t
& VT_ARRAY
) {
4524 type
= pointed_type(type
);
4525 c
+= index
* type_size(type
, &align
);
4529 error("too many field init");
4530 /* XXX: fix this mess by using explicit storage field */
4532 type1
.t
|= (type
->t
& ~VT_TYPE
);
4537 decl_initializer(type
, sec
, c
, 0, size_only
);
4539 /* XXX: make it more general */
4540 if (!size_only
&& nb_elems
> 1) {
4541 unsigned long c_end
;
4546 error("range init not supported yet for dynamic storage");
4547 c_end
= c
+ nb_elems
* elem_size
;
4548 if (c_end
> sec
->data_allocated
)
4549 section_realloc(sec
, c_end
);
4550 src
= sec
->data
+ c
;
4552 for(i
= 1; i
< nb_elems
; i
++) {
4554 memcpy(dst
, src
, elem_size
);
4560 #define EXPR_CONST 1
4563 /* store a value or an expression directly in global data or in local array */
4564 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
4565 int v
, int expr_type
)
4567 int saved_global_expr
, bt
, bit_pos
, bit_size
;
4569 unsigned long long bit_mask
;
4577 /* compound literals must be allocated globally in this case */
4578 saved_global_expr
= global_expr
;
4581 global_expr
= saved_global_expr
;
4582 /* NOTE: symbols are accepted */
4583 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
4584 error("initializer element is not constant");
4592 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
4595 /* XXX: not portable */
4596 /* XXX: generate error if incorrect relocation */
4597 gen_assign_cast(&dtype
);
4598 bt
= type
->t
& VT_BTYPE
;
4599 /* we'll write at most 12 bytes */
4600 if (c
+ 12 > sec
->data_allocated
) {
4601 section_realloc(sec
, c
+ 12);
4603 ptr
= sec
->data
+ c
;
4604 /* XXX: make code faster ? */
4605 if (!(type
->t
& VT_BITFIELD
)) {
4610 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4611 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
4612 bit_mask
= (1LL << bit_size
) - 1;
4614 if ((vtop
->r
& VT_SYM
) &&
4620 (bt
== VT_INT
&& bit_size
!= 32)))
4621 error("initializer element is not computable at load time");
4624 vtop
->c
.i
= (vtop
->c
.i
!= 0);
4626 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4629 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4632 *(double *)ptr
= vtop
->c
.d
;
4635 *(long double *)ptr
= vtop
->c
.ld
;
4638 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
4641 if (vtop
->r
& VT_SYM
) {
4642 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
4644 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4649 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
4656 /* put zeros for variable based init */
4657 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
4660 /* nothing to do because globals are already set to zero */
4662 vpush_global_sym(&func_old_type
, TOK_memset
);
4670 /* 't' contains the type and storage info. 'c' is the offset of the
4671 object in section 'sec'. If 'sec' is NULL, it means stack based
4672 allocation. 'first' is true if array '{' must be read (multi
4673 dimension implicit array init handling). 'size_only' is true if
4674 size only evaluation is wanted (only for arrays). */
4675 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
4676 int first
, int size_only
)
4678 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, i
;
4679 int size1
, align1
, expr_type
;
4683 if (type
->t
& VT_ARRAY
) {
4687 t1
= pointed_type(type
);
4688 size1
= type_size(t1
, &align1
);
4691 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
4697 /* only parse strings here if correct type (otherwise: handle
4698 them as ((w)char *) expressions */
4699 if ((tok
== TOK_LSTR
&&
4700 #ifdef TCC_TARGET_PE
4701 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
4703 (t1
->t
& VT_BTYPE
) == VT_INT
4705 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
4706 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
4711 /* compute maximum number of chars wanted */
4713 cstr_len
= cstr
->size
;
4715 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
4718 if (n
>= 0 && nb
> (n
- array_length
))
4719 nb
= n
- array_length
;
4722 warning("initializer-string for array is too long");
4723 /* in order to go faster for common case (char
4724 string in global variable, we handle it
4726 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
4727 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
4731 ch
= ((unsigned char *)cstr
->data
)[i
];
4733 ch
= ((nwchar_t
*)cstr
->data
)[i
];
4734 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
4742 /* only add trailing zero if enough storage (no
4743 warning in this case since it is standard) */
4744 if (n
< 0 || array_length
< n
) {
4746 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
4752 while (tok
!= '}') {
4753 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
4754 if (n
>= 0 && index
>= n
)
4755 error("index too large");
4756 /* must put zero in holes (note that doing it that way
4757 ensures that it even works with designators) */
4758 if (!size_only
&& array_length
< index
) {
4759 init_putz(t1
, sec
, c
+ array_length
* size1
,
4760 (index
- array_length
) * size1
);
4763 if (index
> array_length
)
4764 array_length
= index
;
4765 /* special test for multi dimensional arrays (may not
4766 be strictly correct if designators are used at the
4768 if (index
>= n
&& no_oblock
)
4777 /* put zeros at the end */
4778 if (!size_only
&& n
>= 0 && array_length
< n
) {
4779 init_putz(t1
, sec
, c
+ array_length
* size1
,
4780 (n
- array_length
) * size1
);
4782 /* patch type size if needed */
4784 s
->c
= array_length
;
4785 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
4786 (sec
|| !first
|| tok
== '{')) {
4789 /* NOTE: the previous test is a specific case for automatic
4790 struct/union init */
4791 /* XXX: union needs only one init */
4793 /* XXX: this test is incorrect for local initializers
4794 beginning with ( without {. It would be much more difficult
4795 to do it correctly (ideally, the expression parser should
4796 be used in all cases) */
4802 while (tok
== '(') {
4806 if (!parse_btype(&type1
, &ad1
))
4808 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
4810 if (!is_assignable_types(type
, &type1
))
4811 error("invalid type for cast");
4816 if (first
|| tok
== '{') {
4825 while (tok
!= '}') {
4826 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
4828 if (!size_only
&& array_length
< index
) {
4829 init_putz(type
, sec
, c
+ array_length
,
4830 index
- array_length
);
4832 index
= index
+ type_size(&f
->type
, &align1
);
4833 if (index
> array_length
)
4834 array_length
= index
;
4836 /* gr: skip fields from same union - ugly. */
4838 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
4839 /* test for same offset */
4840 if (f
->next
->c
!= f
->c
)
4842 /* if yes, test for bitfield shift */
4843 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
4844 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4845 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4846 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
4847 if (bit_pos_1
!= bit_pos_2
)
4854 if (no_oblock
&& f
== NULL
)
4860 /* put zeros at the end */
4861 if (!size_only
&& array_length
< n
) {
4862 init_putz(type
, sec
, c
+ array_length
,
4871 } else if (tok
== '{') {
4873 decl_initializer(type
, sec
, c
, first
, size_only
);
4875 } else if (size_only
) {
4876 /* just skip expression */
4878 while ((parlevel
> 0 || (tok
!= '}' && tok
!= ',')) &&
4882 else if (tok
== ')')
4887 /* currently, we always use constant expression for globals
4888 (may change for scripting case) */
4889 expr_type
= EXPR_CONST
;
4891 expr_type
= EXPR_ANY
;
4892 init_putv(type
, sec
, c
, 0, expr_type
);
4896 /* parse an initializer for type 't' if 'has_init' is non zero, and
4897 allocate space in local or global data space ('r' is either
4898 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
4899 variable 'v' of scope 'scope' is declared before initializers are
4900 parsed. If 'v' is zero, then a reference to the new object is put
4901 in the value stack. If 'has_init' is 2, a special parsing is done
4902 to handle string constants. */
4903 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
4904 int has_init
, int v
, int scope
)
4906 int size
, align
, addr
, data_offset
;
4908 ParseState saved_parse_state
= {0};
4909 TokenString init_str
;
4912 size
= type_size(type
, &align
);
4913 /* If unknown size, we must evaluate it before
4914 evaluating initializers because
4915 initializers can generate global data too
4916 (e.g. string pointers or ISOC99 compound
4917 literals). It also simplifies local
4918 initializers handling */
4919 tok_str_new(&init_str
);
4922 error("unknown type size");
4923 /* get all init string */
4924 if (has_init
== 2) {
4925 /* only get strings */
4926 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
4927 tok_str_add_tok(&init_str
);
4932 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
4934 error("unexpected end of file in initializer");
4935 tok_str_add_tok(&init_str
);
4938 else if (tok
== '}') {
4948 tok_str_add(&init_str
, -1);
4949 tok_str_add(&init_str
, 0);
4952 save_parse_state(&saved_parse_state
);
4954 macro_ptr
= init_str
.str
;
4956 decl_initializer(type
, NULL
, 0, 1, 1);
4957 /* prepare second initializer parsing */
4958 macro_ptr
= init_str
.str
;
4961 /* if still unknown size, error */
4962 size
= type_size(type
, &align
);
4964 error("unknown type size");
4966 /* take into account specified alignment if bigger */
4968 if (ad
->aligned
> align
)
4969 align
= ad
->aligned
;
4970 } else if (ad
->packed
) {
4973 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
4975 #ifdef CONFIG_TCC_BCHECK
4976 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
))
4979 loc
= (loc
- size
) & -align
;
4981 #ifdef CONFIG_TCC_BCHECK
4982 /* handles bounds */
4983 /* XXX: currently, since we do only one pass, we cannot track
4984 '&' operators, so we add only arrays */
4985 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
4986 unsigned long *bounds_ptr
;
4987 /* add padding between regions */
4989 /* then add local bound info */
4990 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
4991 bounds_ptr
[0] = addr
;
4992 bounds_ptr
[1] = size
;
4996 /* local variable */
4997 sym_push(v
, type
, r
, addr
);
4999 /* push local reference */
5000 vset(type
, r
, addr
);
5006 if (v
&& scope
== VT_CONST
) {
5007 /* see if the symbol was already defined */
5010 if (!is_compatible_types(&sym
->type
, type
))
5011 error("incompatible types for redefinition of '%s'",
5012 get_tok_str(v
, NULL
));
5013 if (sym
->type
.t
& VT_EXTERN
) {
5014 /* if the variable is extern, it was not allocated */
5015 sym
->type
.t
&= ~VT_EXTERN
;
5016 /* set array size if it was ommited in extern
5018 if ((sym
->type
.t
& VT_ARRAY
) &&
5019 sym
->type
.ref
->c
< 0 &&
5021 sym
->type
.ref
->c
= type
->ref
->c
;
5023 /* we accept several definitions of the same
5024 global variable. this is tricky, because we
5025 must play with the SHN_COMMON type of the symbol */
5026 /* XXX: should check if the variable was already
5027 initialized. It is incorrect to initialized it
5029 /* no init data, we won't add more to the symbol */
5036 /* allocate symbol in corresponding section */
5041 else if (tcc_state
->nocommon
)
5045 data_offset
= sec
->data_offset
;
5046 data_offset
= (data_offset
+ align
- 1) & -align
;
5048 /* very important to increment global pointer at this time
5049 because initializers themselves can create new initializers */
5050 data_offset
+= size
;
5051 #ifdef CONFIG_TCC_BCHECK
5052 /* add padding if bound check */
5053 if (tcc_state
->do_bounds_check
)
5056 sec
->data_offset
= data_offset
;
5057 /* allocate section space to put the data */
5058 if (sec
->sh_type
!= SHT_NOBITS
&&
5059 data_offset
> sec
->data_allocated
)
5060 section_realloc(sec
, data_offset
);
5061 /* align section if needed */
5062 if (align
> sec
->sh_addralign
)
5063 sec
->sh_addralign
= align
;
5065 addr
= 0; /* avoid warning */
5069 if (scope
!= VT_CONST
|| !sym
) {
5070 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5072 /* update symbol definition */
5074 put_extern_sym(sym
, sec
, addr
, size
);
5077 /* put a common area */
5078 put_extern_sym(sym
, NULL
, align
, size
);
5079 /* XXX: find a nicer way */
5080 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5081 esym
->st_shndx
= SHN_COMMON
;
5086 /* push global reference */
5087 sym
= get_sym_ref(type
, sec
, addr
, size
);
5089 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5092 #ifdef CONFIG_TCC_BCHECK
5093 /* handles bounds now because the symbol must be defined
5094 before for the relocation */
5095 if (tcc_state
->do_bounds_check
) {
5096 unsigned long *bounds_ptr
;
5098 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5099 /* then add global bound info */
5100 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5101 bounds_ptr
[0] = 0; /* relocated */
5102 bounds_ptr
[1] = size
;
5107 decl_initializer(type
, sec
, addr
, 1, 0);
5108 /* restore parse state if needed */
5110 tok_str_free(init_str
.str
);
5111 restore_parse_state(&saved_parse_state
);
5117 static void put_func_debug(Sym
*sym
)
5122 /* XXX: we put here a dummy type */
5123 snprintf(buf
, sizeof(buf
), "%s:%c1",
5124 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5125 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5126 cur_text_section
, sym
->c
);
5127 /* //gr gdb wants a line at the function */
5128 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5133 /* parse an old style function declaration list */
5134 /* XXX: check multiple parameter */
5135 static void func_decl_list(Sym
*func_sym
)
5142 /* parse each declaration */
5143 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
) {
5144 if (!parse_btype(&btype
, &ad
))
5145 expect("declaration list");
5146 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5147 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5149 /* we accept no variable after */
5153 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5154 /* find parameter in function parameter list */
5157 if ((s
->v
& ~SYM_FIELD
) == v
)
5161 error("declaration for parameter '%s' but no such parameter",
5162 get_tok_str(v
, NULL
));
5164 /* check that no storage specifier except 'register' was given */
5165 if (type
.t
& VT_STORAGE
)
5166 error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5167 convert_parameter_type(&type
);
5168 /* we can add the type (NOTE: it could be local to the function) */
5170 /* accept other parameters */
5181 /* parse a function defined by symbol 'sym' and generate its code in
5182 'cur_text_section' */
5183 static void gen_function(Sym
*sym
)
5185 int saved_nocode_wanted
= nocode_wanted
;
5187 ind
= cur_text_section
->data_offset
;
5188 /* NOTE: we patch the symbol size later */
5189 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5190 funcname
= get_tok_str(sym
->v
, NULL
);
5192 /* put debug symbol */
5193 if (tcc_state
->do_debug
)
5194 put_func_debug(sym
);
5195 /* push a dummy symbol to enable local sym storage */
5196 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5197 gfunc_prolog(&sym
->type
);
5199 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5202 cur_text_section
->data_offset
= ind
;
5203 label_pop(&global_label_stack
, NULL
);
5204 sym_pop(&local_stack
, NULL
); /* reset local stack */
5205 /* end of function */
5206 /* patch symbol size */
5207 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5209 if (tcc_state
->do_debug
) {
5210 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5212 /* It's better to crash than to generate wrong code */
5213 cur_text_section
= NULL
;
5214 funcname
= ""; /* for safety */
5215 func_vt
.t
= VT_VOID
; /* for safety */
5216 ind
= 0; /* for safety */
5217 nocode_wanted
= saved_nocode_wanted
;
5220 ST_FUNC
void gen_inline_functions(void)
5223 int *str
, inline_generated
, i
;
5224 struct InlineFunc
*fn
;
5226 /* iterate while inline function are referenced */
5228 inline_generated
= 0;
5229 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5230 fn
= tcc_state
->inline_fns
[i
];
5232 if (sym
&& sym
->c
) {
5233 /* the function was used: generate its code and
5234 convert it to a normal function */
5235 str
= fn
->token_str
;
5238 strcpy(file
->filename
, fn
->filename
);
5239 sym
->r
= VT_SYM
| VT_CONST
;
5240 sym
->type
.t
&= ~VT_INLINE
;
5244 cur_text_section
= text_section
;
5246 macro_ptr
= NULL
; /* fail safe */
5248 inline_generated
= 1;
5251 if (!inline_generated
)
5254 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5255 fn
= tcc_state
->inline_fns
[i
];
5256 str
= fn
->token_str
;
5259 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5262 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5263 ST_FUNC
void decl(int l
)
5271 if (!parse_btype(&btype
, &ad
)) {
5272 /* skip redundant ';' */
5273 /* XXX: find more elegant solution */
5278 if (l
== VT_CONST
&&
5279 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5280 /* global asm block */
5284 /* special test for old K&R protos without explicit int
5285 type. Only accepted when defining global data */
5286 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5290 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5291 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5293 /* we accept no variable after */
5297 while (1) { /* iterate thru each declaration */
5299 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5303 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5304 printf("type = '%s'\n", buf
);
5307 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5308 /* if old style function prototype, we accept a
5311 if (sym
->c
== FUNC_OLD
)
5312 func_decl_list(sym
);
5315 #ifdef TCC_TARGET_PE
5317 type
.t
|= VT_IMPORT
;
5319 type
.t
|= VT_EXPORT
;
5323 error("cannot use local functions");
5324 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5325 expect("function definition");
5327 /* reject abstract declarators in function definition */
5329 while ((sym
= sym
->next
) != NULL
)
5330 if (!(sym
->v
& ~SYM_FIELD
))
5331 expect("identifier");
5333 /* XXX: cannot do better now: convert extern line to static inline */
5334 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5335 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5339 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5342 r
= sym
->type
.ref
->r
;
5343 /* use func_call from prototype if not defined */
5344 if (FUNC_CALL(r
) != FUNC_CDECL
5345 && FUNC_CALL(type
.ref
->r
) == FUNC_CDECL
)
5346 FUNC_CALL(type
.ref
->r
) = FUNC_CALL(r
);
5348 /* use export from prototype */
5350 FUNC_EXPORT(type
.ref
->r
) = 1;
5352 /* use static from prototype */
5353 if (sym
->type
.t
& VT_STATIC
)
5354 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5356 if (!is_compatible_types(&sym
->type
, &type
)) {
5358 error("incompatible types for redefinition of '%s'",
5359 get_tok_str(v
, NULL
));
5361 /* if symbol is already defined, then put complete type */
5364 /* put function symbol */
5365 sym
= global_identifier_push(v
, type
.t
, 0);
5366 sym
->type
.ref
= type
.ref
;
5369 /* static inline functions are just recorded as a kind
5370 of macro. Their code will be emitted at the end of
5371 the compilation unit only if they are used */
5372 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5373 (VT_INLINE
| VT_STATIC
)) {
5374 TokenString func_str
;
5376 struct InlineFunc
*fn
;
5377 const char *filename
;
5379 tok_str_new(&func_str
);
5385 error("unexpected end of file");
5386 tok_str_add_tok(&func_str
);
5391 } else if (t
== '}') {
5393 if (block_level
== 0)
5397 tok_str_add(&func_str
, -1);
5398 tok_str_add(&func_str
, 0);
5399 filename
= file
? file
->filename
: "";
5400 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5401 strcpy(fn
->filename
, filename
);
5403 fn
->token_str
= func_str
.str
;
5404 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5407 /* compute text section */
5408 cur_text_section
= ad
.section
;
5409 if (!cur_text_section
)
5410 cur_text_section
= text_section
;
5411 sym
->r
= VT_SYM
| VT_CONST
;
5416 if (btype
.t
& VT_TYPEDEF
) {
5417 /* save typedefed type */
5418 /* XXX: test storage specifiers ? */
5419 sym
= sym_push(v
, &type
, INT_ATTR(&ad
), 0);
5420 sym
->type
.t
|= VT_TYPEDEF
;
5421 } else if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5423 /* external function definition */
5424 /* specific case for func_call attribute */
5425 type
.ref
->r
= INT_ATTR(&ad
);
5426 fn
= external_sym(v
, &type
, 0);
5428 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5434 /* Part 1: __USER_LABEL_PREFIX__ (user defined) */
5436 pstrcat(target
, sizeof(target
), tokc
.cstr
->data
);
5438 pstrcat(target
, sizeof(target
), get_tok_str(tok
, NULL
));
5441 /* Part 2: api name */
5443 pstrcat(target
, sizeof(target
), tokc
.cstr
->data
);
5445 pstrcat(target
, sizeof(target
), get_tok_str(tok
, NULL
));
5449 if (tcc_state
->warn_unsupported
)
5450 warning("ignoring redirection from %s to %s\n", get_tok_str(v
, NULL
), target
);
5452 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
5453 parse_attribute((AttributeDef
*) &fn
->type
.ref
->r
);
5456 /* not lvalue if array */
5458 if (!(type
.t
& VT_ARRAY
))
5459 r
|= lvalue_type(type
.t
);
5460 has_init
= (tok
== '=');
5461 if ((btype
.t
& VT_EXTERN
) ||
5462 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
5463 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
5464 /* external variable */
5465 /* NOTE: as GCC, uninitialized global static
5466 arrays of null size are considered as
5468 external_sym(v
, &type
, r
);
5470 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
5471 if (type
.t
& VT_STATIC
)
5477 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, l
);