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
, char *asm_label
, int scope
);
79 static int decl0(int l
, int is_for_loop_init
);
80 static void expr_eq(void);
81 static void unary_type(CType
*type
);
82 static void vla_runtime_type_size(CType
*type
, int *a
);
83 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
84 static void expr_type(CType
*type
);
86 ST_INLN
int is_float(int t
)
90 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
;
93 /* we use our own 'finite' function to avoid potential problems with
94 non standard math libs */
95 /* XXX: endianness dependent */
96 ST_FUNC
int ieee_finite(double d
)
99 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
102 ST_FUNC
void test_lvalue(void)
104 if (!(vtop
->r
& VT_LVAL
))
108 /* ------------------------------------------------------------------------- */
109 /* symbol allocator */
110 static Sym
*__sym_malloc(void)
112 Sym
*sym_pool
, *sym
, *last_sym
;
115 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
116 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
118 last_sym
= sym_free_first
;
120 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
121 sym
->next
= last_sym
;
125 sym_free_first
= last_sym
;
129 static inline Sym
*sym_malloc(void)
132 sym
= sym_free_first
;
134 sym
= __sym_malloc();
135 sym_free_first
= sym
->next
;
139 ST_INLN
void sym_free(Sym
*sym
)
141 sym
->next
= sym_free_first
;
142 tcc_free(sym
->asm_label
);
143 sym_free_first
= sym
;
146 /* push, without hashing */
147 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
166 /* find a symbol and return its associated structure. 's' is the top
167 of the symbol stack */
168 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
178 /* structure lookup */
179 ST_INLN Sym
*struct_find(int v
)
182 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
184 return table_ident
[v
]->sym_struct
;
187 /* find an identifier */
188 ST_INLN Sym
*sym_find(int v
)
191 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
193 return table_ident
[v
]->sym_identifier
;
196 /* push a given symbol on the symbol stack */
197 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
206 s
= sym_push2(ps
, v
, type
->t
, c
);
207 s
->type
.ref
= type
->ref
;
209 /* don't record fields or anonymous symbols */
211 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
212 /* record symbol in token array */
213 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
215 ps
= &ts
->sym_struct
;
217 ps
= &ts
->sym_identifier
;
224 /* push a global identifier */
225 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
228 s
= sym_push2(&global_stack
, v
, t
, c
);
229 /* don't record anonymous symbol */
230 if (v
< SYM_FIRST_ANOM
) {
231 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
232 /* modify the top most local identifier, so that
233 sym_identifier will point to 's' when popped */
235 ps
= &(*ps
)->prev_tok
;
242 /* pop symbols until top reaches 'b' */
243 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
253 /* remove symbol in token array */
255 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
256 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
258 ps
= &ts
->sym_struct
;
260 ps
= &ts
->sym_identifier
;
269 static void weaken_symbol(Sym
*sym
)
271 sym
->type
.t
|= VT_WEAK
;
276 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
277 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
278 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
282 /* ------------------------------------------------------------------------- */
284 ST_FUNC
void swap(int *p
, int *q
)
292 static void vsetc(CType
*type
, int r
, CValue
*vc
)
296 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
297 error("memory full");
298 /* cannot let cpu flags if other instruction are generated. Also
299 avoid leaving VT_JMP anywhere except on the top of the stack
300 because it would complicate the code generator. */
301 if (vtop
>= vstack
) {
302 v
= vtop
->r
& VT_VALMASK
;
303 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
313 /* push constant of type "type" with useless value */
314 void vpush(CType
*type
)
317 vsetc(type
, VT_CONST
, &cval
);
320 /* push integer constant */
321 ST_FUNC
void vpushi(int v
)
325 vsetc(&int_type
, VT_CONST
, &cval
);
328 /* push long long constant */
329 static void vpushll(long long v
)
336 vsetc(&ctype
, VT_CONST
, &cval
);
339 /* push arbitrary 64bit constant */
340 void vpush64(int ty
, unsigned long long v
)
346 vsetc(&ctype
, VT_CONST
, &cval
);
349 /* Return a static symbol pointing to a section */
350 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
356 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
357 sym
->type
.ref
= type
->ref
;
358 sym
->r
= VT_CONST
| VT_SYM
;
359 put_extern_sym(sym
, sec
, offset
, size
);
363 /* push a reference to a section offset by adding a dummy symbol */
364 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
369 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
370 vtop
->sym
= get_sym_ref(type
, sec
, offset
, size
);
373 /* define a new external reference to a symbol 'v' of type 'u' */
374 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
380 /* push forward reference */
381 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
382 s
->type
.ref
= type
->ref
;
383 s
->r
= r
| VT_CONST
| VT_SYM
;
388 /* define a new external reference to a symbol 'v' with alternate asm
389 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
390 is no alternate name (most cases) */
391 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
397 /* push forward reference */
398 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
399 s
->asm_label
= asm_label
;
400 s
->type
.t
|= VT_EXTERN
;
401 } else if (s
->type
.ref
== func_old_type
.ref
) {
402 s
->type
.ref
= type
->ref
;
403 s
->r
= r
| VT_CONST
| VT_SYM
;
404 s
->type
.t
|= VT_EXTERN
;
405 } else if (!is_compatible_types(&s
->type
, type
)) {
406 error("incompatible types for redefinition of '%s'",
407 get_tok_str(v
, NULL
));
412 /* push a reference to global symbol v */
413 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
418 sym
= external_global_sym(v
, type
, 0);
420 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
424 ST_FUNC
void vset(CType
*type
, int r
, int v
)
429 vsetc(type
, r
, &cval
);
432 static void vseti(int r
, int v
)
440 ST_FUNC
void vswap(void)
449 ST_FUNC
void vpushv(SValue
*v
)
451 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
452 error("memory full");
457 static void vdup(void)
462 /* save r to the memory stack, and mark it as being free */
463 ST_FUNC
void save_reg(int r
)
465 int l
, saved
, size
, align
;
469 /* modify all stack values */
472 for(p
=vstack
;p
<=vtop
;p
++) {
473 if ((p
->r
& VT_VALMASK
) == r
||
474 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
475 /* must save value on stack if not already done */
477 /* NOTE: must reload 'r' because r might be equal to r2 */
478 r
= p
->r
& VT_VALMASK
;
479 /* store register in the stack */
481 if ((p
->r
& VT_LVAL
) ||
482 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
483 #ifdef TCC_TARGET_X86_64
484 type
= &char_pointer_type
;
488 size
= type_size(type
, &align
);
489 loc
= (loc
- size
) & -align
;
491 sv
.r
= VT_LOCAL
| VT_LVAL
;
494 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
495 /* x86 specific: need to pop fp register ST0 if saved */
497 o(0xd8dd); /* fstp %st(0) */
500 #ifndef TCC_TARGET_X86_64
501 /* special long long case */
502 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
510 /* mark that stack entry as being saved on the stack */
511 if (p
->r
& VT_LVAL
) {
512 /* also clear the bounded flag because the
513 relocation address of the function was stored in
515 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
517 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
525 #ifdef TCC_TARGET_ARM
526 /* find a register of class 'rc2' with at most one reference on stack.
527 * If none, call get_reg(rc) */
528 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
533 for(r
=0;r
<NB_REGS
;r
++) {
534 if (reg_classes
[r
] & rc2
) {
537 for(p
= vstack
; p
<= vtop
; p
++) {
538 if ((p
->r
& VT_VALMASK
) == r
||
539 (p
->r2
& VT_VALMASK
) == r
)
550 /* find a free register of class 'rc'. If none, save one register */
551 ST_FUNC
int get_reg(int rc
)
556 /* find a free register */
557 for(r
=0;r
<NB_REGS
;r
++) {
558 if (reg_classes
[r
] & rc
) {
559 for(p
=vstack
;p
<=vtop
;p
++) {
560 if ((p
->r
& VT_VALMASK
) == r
||
561 (p
->r2
& VT_VALMASK
) == r
)
569 /* no register left : free the first one on the stack (VERY
570 IMPORTANT to start from the bottom to ensure that we don't
571 spill registers used in gen_opi()) */
572 for(p
=vstack
;p
<=vtop
;p
++) {
573 r
= p
->r
& VT_VALMASK
;
574 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
576 /* also look at second register (if long long) */
577 r
= p
->r2
& VT_VALMASK
;
578 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
584 /* Should never comes here */
588 /* save registers up to (vtop - n) stack entry */
589 ST_FUNC
void save_regs(int n
)
594 for(p
= vstack
;p
<= p1
; p
++) {
595 r
= p
->r
& VT_VALMASK
;
602 /* move register 's' to 'r', and flush previous value of r to memory
604 static void move_reg(int r
, int s
)
617 /* get address of vtop (vtop MUST BE an lvalue) */
618 static void gaddrof(void)
620 if (vtop
->r
& VT_REF
)
623 /* tricky: if saved lvalue, then we can go back to lvalue */
624 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
625 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
630 #ifdef CONFIG_TCC_BCHECK
631 /* generate lvalue bound code */
632 static void gbound(void)
637 vtop
->r
&= ~VT_MUSTBOUND
;
638 /* if lvalue, then use checking code before dereferencing */
639 if (vtop
->r
& VT_LVAL
) {
640 /* if not VT_BOUNDED value, then make one */
641 if (!(vtop
->r
& VT_BOUNDED
)) {
642 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
643 /* must save type because we must set it to int to get pointer */
645 vtop
->type
.t
= VT_INT
;
648 gen_bounded_ptr_add();
649 vtop
->r
|= lval_type
;
652 /* then check for dereferencing */
653 gen_bounded_ptr_deref();
658 /* store vtop a register belonging to class 'rc'. lvalues are
659 converted to values. Cannot be used if cannot be converted to
660 register value (such as structures). */
661 ST_FUNC
int gv(int rc
)
663 int r
, bit_pos
, bit_size
, size
, align
, i
;
664 #ifndef TCC_TARGET_X86_64
668 /* NOTE: get_reg can modify vstack[] */
669 if (vtop
->type
.t
& VT_BITFIELD
) {
672 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
673 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
674 /* remove bit field info to avoid loops */
675 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
676 /* cast to int to propagate signedness in following ops */
677 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
682 if((vtop
->type
.t
& VT_UNSIGNED
) ||
683 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
684 type
.t
|= VT_UNSIGNED
;
686 /* generate shifts */
687 vpushi(bits
- (bit_pos
+ bit_size
));
689 vpushi(bits
- bit_size
);
690 /* NOTE: transformed to SHR if unsigned */
694 if (is_float(vtop
->type
.t
) &&
695 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
698 unsigned long offset
;
699 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
703 /* XXX: unify with initializers handling ? */
704 /* CPUs usually cannot use float constants, so we store them
705 generically in data segment */
706 size
= type_size(&vtop
->type
, &align
);
707 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
708 data_section
->data_offset
= offset
;
709 /* XXX: not portable yet */
710 #if defined(__i386__) || defined(__x86_64__)
711 /* Zero pad x87 tenbyte long doubles */
712 if (size
== LDOUBLE_SIZE
)
713 vtop
->c
.tab
[2] &= 0xffff;
715 ptr
= section_ptr_add(data_section
, size
);
717 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
721 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
725 ptr
[i
] = vtop
->c
.tab
[i
];
726 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
727 vtop
->r
|= VT_LVAL
| VT_SYM
;
731 #ifdef CONFIG_TCC_BCHECK
732 if (vtop
->r
& VT_MUSTBOUND
)
736 r
= vtop
->r
& VT_VALMASK
;
737 #ifndef TCC_TARGET_X86_64
742 /* need to reload if:
744 - lvalue (need to dereference pointer)
745 - already a register, but not in the right class */
747 || (vtop
->r
& VT_LVAL
)
748 || !(reg_classes
[r
] & rc
)
749 #ifndef TCC_TARGET_X86_64
750 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
755 #ifndef TCC_TARGET_X86_64
756 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
758 unsigned long long ll
;
759 /* two register type load : expand to two words
761 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
764 vtop
->c
.ui
= ll
; /* first word */
766 vtop
->r
= r
; /* save register value */
767 vpushi(ll
>> 32); /* second word */
768 } else if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
769 (vtop
->r
& VT_LVAL
)) {
770 /* We do not want to modifier the long long
771 pointer here, so the safest (and less
772 efficient) is to save all the other registers
773 in the stack. XXX: totally inefficient. */
775 /* load from memory */
778 vtop
[-1].r
= r
; /* save register value */
779 /* increment pointer to get second word */
780 vtop
->type
.t
= VT_INT
;
789 vtop
[-1].r
= r
; /* save register value */
790 vtop
->r
= vtop
[-1].r2
;
792 /* allocate second register */
796 /* write second register */
800 if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
802 /* lvalue of scalar type : need to use lvalue type
803 because of possible cast */
806 /* compute memory access type */
807 if (vtop
->r
& VT_LVAL_BYTE
)
809 else if (vtop
->r
& VT_LVAL_SHORT
)
811 if (vtop
->r
& VT_LVAL_UNSIGNED
)
815 /* restore wanted type */
818 /* one register type load */
823 #ifdef TCC_TARGET_C67
824 /* uses register pairs for doubles */
825 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
832 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
833 ST_FUNC
void gv2(int rc1
, int rc2
)
837 /* generate more generic register first. But VT_JMP or VT_CMP
838 values must be generated first in all cases to avoid possible
840 v
= vtop
[0].r
& VT_VALMASK
;
841 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
846 /* test if reload is needed for first register */
847 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
857 /* test if reload is needed for first register */
858 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
864 /* wrapper around RC_FRET to return a register by type */
865 static int rc_fret(int t
)
867 #ifdef TCC_TARGET_X86_64
868 if (t
== VT_LDOUBLE
) {
875 /* wrapper around REG_FRET to return a register by type */
876 static int reg_fret(int t
)
878 #ifdef TCC_TARGET_X86_64
879 if (t
== VT_LDOUBLE
) {
886 /* expand long long on stack in two int registers */
887 static void lexpand(void)
891 u
= vtop
->type
.t
& VT_UNSIGNED
;
894 vtop
[0].r
= vtop
[-1].r2
;
895 vtop
[0].r2
= VT_CONST
;
896 vtop
[-1].r2
= VT_CONST
;
897 vtop
[0].type
.t
= VT_INT
| u
;
898 vtop
[-1].type
.t
= VT_INT
| u
;
901 #ifdef TCC_TARGET_ARM
902 /* expand long long on stack */
903 ST_FUNC
void lexpand_nr(void)
907 u
= vtop
->type
.t
& VT_UNSIGNED
;
910 vtop
->type
.t
= VT_INT
| u
;
911 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
913 vtop
[-1].c
.ui
= vtop
->c
.ull
;
914 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
916 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
918 vtop
->r
= vtop
[-1].r
;
919 } else if (v
> VT_CONST
) {
923 vtop
->r
= vtop
[-1].r2
;
924 vtop
[-1].r2
= VT_CONST
;
925 vtop
[-1].type
.t
= VT_INT
| u
;
929 /* build a long long from two ints */
930 static void lbuild(int t
)
933 vtop
[-1].r2
= vtop
[0].r
;
938 /* rotate n first stack elements to the bottom
939 I1 ... In -> I2 ... In I1 [top is right]
941 static void vrotb(int n
)
952 /* rotate n first stack elements to the top
953 I1 ... In -> In I1 ... I(n-1) [top is right]
955 ST_FUNC
void vrott(int n
)
961 for(i
= 0;i
< n
- 1; i
++)
962 vtop
[-i
] = vtop
[-i
- 1];
966 #ifdef TCC_TARGET_ARM
967 /* like vrott but in other direction
968 In ... I1 -> I(n-1) ... I1 In [top is right]
970 ST_FUNC
void vnrott(int n
)
976 for(i
= n
- 1; i
> 0; i
--)
977 vtop
[-i
] = vtop
[-i
+ 1];
982 /* pop stack value */
983 ST_FUNC
void vpop(void)
986 v
= vtop
->r
& VT_VALMASK
;
987 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
988 /* for x86, we need to pop the FP stack */
989 if (v
== TREG_ST0
&& !nocode_wanted
) {
990 o(0xd8dd); /* fstp %st(0) */
993 if (v
== VT_JMP
|| v
== VT_JMPI
) {
994 /* need to put correct jump if && or || without test */
1000 /* convert stack entry to register and duplicate its value in another
1002 static void gv_dup(void)
1008 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1015 /* stack: H L L1 H1 */
1023 /* duplicate value */
1028 #ifdef TCC_TARGET_X86_64
1029 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1039 load(r1
, &sv
); /* move r to r1 */
1041 /* duplicates value */
1047 #ifndef TCC_TARGET_X86_64
1048 /* generate CPU independent (unsigned) long long operations */
1049 static void gen_opl(int op
)
1051 int t
, a
, b
, op1
, c
, i
;
1053 unsigned short reg_iret
= REG_IRET
;
1054 unsigned short reg_lret
= REG_LRET
;
1060 func
= TOK___divdi3
;
1063 func
= TOK___udivdi3
;
1066 func
= TOK___moddi3
;
1069 func
= TOK___umoddi3
;
1076 /* call generic long long function */
1077 vpush_global_sym(&func_old_type
, func
);
1082 vtop
->r2
= reg_lret
;
1095 /* stack: L1 H1 L2 H2 */
1100 vtop
[-2] = vtop
[-3];
1103 /* stack: H1 H2 L1 L2 */
1109 /* stack: H1 H2 L1 L2 ML MH */
1112 /* stack: ML MH H1 H2 L1 L2 */
1116 /* stack: ML MH H1 L2 H2 L1 */
1121 /* stack: ML MH M1 M2 */
1124 } else if (op
== '+' || op
== '-') {
1125 /* XXX: add non carry method too (for MIPS or alpha) */
1131 /* stack: H1 H2 (L1 op L2) */
1134 gen_op(op1
+ 1); /* TOK_xxxC2 */
1137 /* stack: H1 H2 (L1 op L2) */
1140 /* stack: (L1 op L2) H1 H2 */
1142 /* stack: (L1 op L2) (H1 op H2) */
1150 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1151 t
= vtop
[-1].type
.t
;
1155 /* stack: L H shift */
1157 /* constant: simpler */
1158 /* NOTE: all comments are for SHL. the other cases are
1159 done by swaping words */
1170 if (op
!= TOK_SAR
) {
1203 /* XXX: should provide a faster fallback on x86 ? */
1206 func
= TOK___ashrdi3
;
1209 func
= TOK___lshrdi3
;
1212 func
= TOK___ashldi3
;
1218 /* compare operations */
1224 /* stack: L1 H1 L2 H2 */
1226 vtop
[-1] = vtop
[-2];
1228 /* stack: L1 L2 H1 H2 */
1231 /* when values are equal, we need to compare low words. since
1232 the jump is inverted, we invert the test too. */
1235 else if (op1
== TOK_GT
)
1237 else if (op1
== TOK_ULT
)
1239 else if (op1
== TOK_UGT
)
1244 if (op1
!= TOK_NE
) {
1248 /* generate non equal test */
1249 /* XXX: NOT PORTABLE yet */
1253 #if defined(TCC_TARGET_I386)
1254 b
= psym(0x850f, 0);
1255 #elif defined(TCC_TARGET_ARM)
1257 o(0x1A000000 | encbranch(ind
, 0, 1));
1258 #elif defined(TCC_TARGET_C67)
1259 error("not implemented");
1261 #error not supported
1265 /* compare low. Always unsigned */
1269 else if (op1
== TOK_LE
)
1271 else if (op1
== TOK_GT
)
1273 else if (op1
== TOK_GE
)
1284 /* handle integer constant optimizations and various machine
1286 static void gen_opic(int op
)
1288 int c1
, c2
, t1
, t2
, n
;
1291 typedef unsigned long long U
;
1295 t1
= v1
->type
.t
& VT_BTYPE
;
1296 t2
= v2
->type
.t
& VT_BTYPE
;
1300 else if (v1
->type
.t
& VT_UNSIGNED
)
1307 else if (v2
->type
.t
& VT_UNSIGNED
)
1312 /* currently, we cannot do computations with forward symbols */
1313 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1314 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1317 case '+': l1
+= l2
; break;
1318 case '-': l1
-= l2
; break;
1319 case '&': l1
&= l2
; break;
1320 case '^': l1
^= l2
; break;
1321 case '|': l1
|= l2
; break;
1322 case '*': l1
*= l2
; break;
1329 /* if division by zero, generate explicit division */
1332 error("division by zero in constant");
1336 default: l1
/= l2
; break;
1337 case '%': l1
%= l2
; break;
1338 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1339 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1342 case TOK_SHL
: l1
<<= l2
; break;
1343 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1344 case TOK_SAR
: l1
>>= l2
; break;
1346 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1347 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1348 case TOK_EQ
: l1
= l1
== l2
; break;
1349 case TOK_NE
: l1
= l1
!= l2
; break;
1350 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1351 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1352 case TOK_LT
: l1
= l1
< l2
; break;
1353 case TOK_GE
: l1
= l1
>= l2
; break;
1354 case TOK_LE
: l1
= l1
<= l2
; break;
1355 case TOK_GT
: l1
= l1
> l2
; break;
1357 case TOK_LAND
: l1
= l1
&& l2
; break;
1358 case TOK_LOR
: l1
= l1
|| l2
; break;
1365 /* if commutative ops, put c2 as constant */
1366 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1367 op
== '|' || op
== '*')) {
1369 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1370 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1372 /* Filter out NOP operations like x*1, x-0, x&-1... */
1373 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1376 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1377 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1383 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1384 /* try to use shifts instead of muls or divs */
1385 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1394 else if (op
== TOK_PDIV
)
1400 } else if (c2
&& (op
== '+' || op
== '-') &&
1401 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1402 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1403 /* symbol + constant case */
1410 if (!nocode_wanted
) {
1411 /* call low level op generator */
1412 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1423 /* generate a floating point operation with constant propagation */
1424 static void gen_opif(int op
)
1432 /* currently, we cannot do computations with forward symbols */
1433 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1434 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1436 if (v1
->type
.t
== VT_FLOAT
) {
1439 } else if (v1
->type
.t
== VT_DOUBLE
) {
1447 /* NOTE: we only do constant propagation if finite number (not
1448 NaN or infinity) (ANSI spec) */
1449 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1453 case '+': f1
+= f2
; break;
1454 case '-': f1
-= f2
; break;
1455 case '*': f1
*= f2
; break;
1459 error("division by zero in constant");
1464 /* XXX: also handles tests ? */
1468 /* XXX: overflow test ? */
1469 if (v1
->type
.t
== VT_FLOAT
) {
1471 } else if (v1
->type
.t
== VT_DOUBLE
) {
1479 if (!nocode_wanted
) {
1487 static int pointed_size(CType
*type
)
1490 return type_size(pointed_type(type
), &align
);
1493 static void vla_runtime_pointed_size(CType
*type
)
1496 vla_runtime_type_size(pointed_type(type
), &align
);
1499 static inline int is_null_pointer(SValue
*p
)
1501 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1503 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1504 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0);
1507 static inline int is_integer_btype(int bt
)
1509 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1510 bt
== VT_INT
|| bt
== VT_LLONG
);
1513 /* check types for comparison or substraction of pointers */
1514 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1516 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1519 /* null pointers are accepted for all comparisons as gcc */
1520 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1524 bt1
= type1
->t
& VT_BTYPE
;
1525 bt2
= type2
->t
& VT_BTYPE
;
1526 /* accept comparison between pointer and integer with a warning */
1527 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1528 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1529 warning("comparison between pointer and integer");
1533 /* both must be pointers or implicit function pointers */
1534 if (bt1
== VT_PTR
) {
1535 type1
= pointed_type(type1
);
1536 } else if (bt1
!= VT_FUNC
)
1537 goto invalid_operands
;
1539 if (bt2
== VT_PTR
) {
1540 type2
= pointed_type(type2
);
1541 } else if (bt2
!= VT_FUNC
) {
1543 error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1545 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1546 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1550 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1551 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1552 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1553 /* gcc-like error if '-' is used */
1555 goto invalid_operands
;
1557 warning("comparison of distinct pointer types lacks a cast");
1561 /* generic gen_op: handles types problems */
1562 ST_FUNC
void gen_op(int op
)
1564 int u
, t1
, t2
, bt1
, bt2
, t
;
1567 t1
= vtop
[-1].type
.t
;
1568 t2
= vtop
[0].type
.t
;
1569 bt1
= t1
& VT_BTYPE
;
1570 bt2
= t2
& VT_BTYPE
;
1572 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1573 /* at least one operand is a pointer */
1574 /* relationnal op: must be both pointers */
1575 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1576 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1577 /* pointers are handled are unsigned */
1578 #ifdef TCC_TARGET_X86_64
1579 t
= VT_LLONG
| VT_UNSIGNED
;
1581 t
= VT_INT
| VT_UNSIGNED
;
1585 /* if both pointers, then it must be the '-' op */
1586 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1588 error("cannot use pointers here");
1589 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1590 /* XXX: check that types are compatible */
1591 if (vtop
[-1].type
.t
& VT_VLA
) {
1592 vla_runtime_pointed_size(&vtop
[-1].type
);
1594 vpushi(pointed_size(&vtop
[-1].type
));
1598 /* set to integer type */
1599 #ifdef TCC_TARGET_X86_64
1600 vtop
->type
.t
= VT_LLONG
;
1602 vtop
->type
.t
= VT_INT
;
1607 /* exactly one pointer : must be '+' or '-'. */
1608 if (op
!= '-' && op
!= '+')
1609 error("cannot use pointers here");
1610 /* Put pointer as first operand */
1611 if (bt2
== VT_PTR
) {
1615 type1
= vtop
[-1].type
;
1616 type1
.t
&= ~VT_ARRAY
;
1617 if (vtop
[-1].type
.t
& VT_VLA
)
1618 vla_runtime_pointed_size(&vtop
[-1].type
);
1620 u
= pointed_size(&vtop
[-1].type
);
1622 error("unknown array element size");
1623 #ifdef TCC_TARGET_X86_64
1626 /* XXX: cast to int ? (long long case) */
1631 #ifdef CONFIG_TCC_BCHECK
1632 /* if evaluating constant expression, no code should be
1633 generated, so no bound check */
1634 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1635 /* if bounded pointers, we generate a special code to
1642 gen_bounded_ptr_add();
1648 /* put again type if gen_opic() swaped operands */
1651 } else if (is_float(bt1
) || is_float(bt2
)) {
1652 /* compute bigger type and do implicit casts */
1653 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1655 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1660 /* floats can only be used for a few operations */
1661 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1662 (op
< TOK_ULT
|| op
> TOK_GT
))
1663 error("invalid operands for binary operation");
1665 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1666 /* cast to biggest op */
1668 /* convert to unsigned if it does not fit in a long long */
1669 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1670 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1674 /* integer operations */
1676 /* convert to unsigned if it does not fit in an integer */
1677 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1678 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1681 /* XXX: currently, some unsigned operations are explicit, so
1682 we modify them here */
1683 if (t
& VT_UNSIGNED
) {
1690 else if (op
== TOK_LT
)
1692 else if (op
== TOK_GT
)
1694 else if (op
== TOK_LE
)
1696 else if (op
== TOK_GE
)
1703 /* special case for shifts and long long: we keep the shift as
1705 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1712 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1713 /* relationnal op: the result is an int */
1714 vtop
->type
.t
= VT_INT
;
1721 #ifndef TCC_TARGET_ARM
1722 /* generic itof for unsigned long long case */
1723 static void gen_cvt_itof1(int t
)
1725 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1726 (VT_LLONG
| VT_UNSIGNED
)) {
1729 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1730 #if LDOUBLE_SIZE != 8
1731 else if (t
== VT_LDOUBLE
)
1732 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1735 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1739 vtop
->r
= reg_fret(t
);
1746 /* generic ftoi for unsigned long long case */
1747 static void gen_cvt_ftoi1(int t
)
1751 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1752 /* not handled natively */
1753 st
= vtop
->type
.t
& VT_BTYPE
;
1755 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1756 #if LDOUBLE_SIZE != 8
1757 else if (st
== VT_LDOUBLE
)
1758 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1761 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1766 vtop
->r2
= REG_LRET
;
1772 /* force char or short cast */
1773 static void force_charshort_cast(int t
)
1777 /* XXX: add optimization if lvalue : just change type and offset */
1782 if (t
& VT_UNSIGNED
) {
1783 vpushi((1 << bits
) - 1);
1789 /* result must be signed or the SAR is converted to an SHL
1790 This was not the case when "t" was a signed short
1791 and the last value on the stack was an unsigned int */
1792 vtop
->type
.t
&= ~VT_UNSIGNED
;
1798 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1799 static void gen_cast(CType
*type
)
1801 int sbt
, dbt
, sf
, df
, c
, p
;
1803 /* special delayed cast for char/short */
1804 /* XXX: in some cases (multiple cascaded casts), it may still
1806 if (vtop
->r
& VT_MUSTCAST
) {
1807 vtop
->r
&= ~VT_MUSTCAST
;
1808 force_charshort_cast(vtop
->type
.t
);
1811 /* bitfields first get cast to ints */
1812 if (vtop
->type
.t
& VT_BITFIELD
) {
1816 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1817 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1822 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1823 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1825 /* constant case: we can do it now */
1826 /* XXX: in ISOC, cannot do it if error in convert */
1827 if (sbt
== VT_FLOAT
)
1828 vtop
->c
.ld
= vtop
->c
.f
;
1829 else if (sbt
== VT_DOUBLE
)
1830 vtop
->c
.ld
= vtop
->c
.d
;
1833 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1834 if (sbt
& VT_UNSIGNED
)
1835 vtop
->c
.ld
= vtop
->c
.ull
;
1837 vtop
->c
.ld
= vtop
->c
.ll
;
1839 if (sbt
& VT_UNSIGNED
)
1840 vtop
->c
.ld
= vtop
->c
.ui
;
1842 vtop
->c
.ld
= vtop
->c
.i
;
1845 if (dbt
== VT_FLOAT
)
1846 vtop
->c
.f
= (float)vtop
->c
.ld
;
1847 else if (dbt
== VT_DOUBLE
)
1848 vtop
->c
.d
= (double)vtop
->c
.ld
;
1849 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1850 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1851 } else if (sf
&& dbt
== VT_BOOL
) {
1852 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1855 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1856 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1857 vtop
->c
.ll
= vtop
->c
.ull
;
1858 else if (sbt
& VT_UNSIGNED
)
1859 vtop
->c
.ll
= vtop
->c
.ui
;
1860 #ifdef TCC_TARGET_X86_64
1861 else if (sbt
== VT_PTR
)
1864 else if (sbt
!= VT_LLONG
)
1865 vtop
->c
.ll
= vtop
->c
.i
;
1867 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1868 vtop
->c
.ull
= vtop
->c
.ll
;
1869 else if (dbt
== VT_BOOL
)
1870 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1871 else if (dbt
!= VT_LLONG
) {
1873 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1875 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1878 if(dbt
& VT_UNSIGNED
)
1879 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1881 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1884 } else if (p
&& dbt
== VT_BOOL
) {
1887 } else if (!nocode_wanted
) {
1888 /* non constant case: generate code */
1890 /* convert from fp to fp */
1893 /* convert int to fp */
1896 /* convert fp to int */
1897 if (dbt
== VT_BOOL
) {
1901 /* we handle char/short/etc... with generic code */
1902 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1903 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1907 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1908 /* additional cast for char/short... */
1913 #ifndef TCC_TARGET_X86_64
1914 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1915 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1916 /* scalar to long long */
1917 /* machine independent conversion */
1919 /* generate high word */
1920 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
1924 if (sbt
== VT_PTR
) {
1925 /* cast from pointer to int before we apply
1926 shift operation, which pointers don't support*/
1927 gen_cast(&int_type
);
1933 /* patch second register */
1934 vtop
[-1].r2
= vtop
->r
;
1938 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
1939 (dbt
& VT_BTYPE
) == VT_PTR
||
1940 (dbt
& VT_BTYPE
) == VT_FUNC
) {
1941 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
1942 (sbt
& VT_BTYPE
) != VT_PTR
&&
1943 (sbt
& VT_BTYPE
) != VT_FUNC
) {
1944 /* need to convert from 32bit to 64bit */
1946 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
1947 /* x86_64 specific: movslq */
1949 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
1953 } else if (dbt
== VT_BOOL
) {
1954 /* scalar to bool */
1957 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
1958 (dbt
& VT_BTYPE
) == VT_SHORT
) {
1959 if (sbt
== VT_PTR
) {
1960 vtop
->type
.t
= VT_INT
;
1961 warning("nonportable conversion from pointer to char/short");
1963 force_charshort_cast(dbt
);
1964 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
1966 if (sbt
== VT_LLONG
) {
1967 /* from long long: just take low order word */
1971 /* if lvalue and single word type, nothing to do because
1972 the lvalue already contains the real type size (see
1973 VT_LVAL_xxx constants) */
1976 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
1977 /* if we are casting between pointer types,
1978 we must update the VT_LVAL_xxx size */
1979 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
1980 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
1985 /* return type size as known at compile time. Put alignment at 'a' */
1986 ST_FUNC
int type_size(CType
*type
, int *a
)
1991 bt
= type
->t
& VT_BTYPE
;
1992 if (bt
== VT_STRUCT
) {
1997 } else if (bt
== VT_PTR
) {
1998 if (type
->t
& VT_ARRAY
) {
2002 ts
= type_size(&s
->type
, a
);
2004 if (ts
< 0 && s
->c
< 0)
2012 } else if (bt
== VT_LDOUBLE
) {
2014 return LDOUBLE_SIZE
;
2015 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2016 #ifdef TCC_TARGET_I386
2017 #ifdef TCC_TARGET_PE
2022 #elif defined(TCC_TARGET_ARM)
2032 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2035 } else if (bt
== VT_SHORT
) {
2039 /* char, void, function, _Bool */
2045 /* push type size as known at runtime time on top of value stack. Put
2047 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2049 if (type
->t
& VT_VLA
) {
2050 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2052 vpushi(type_size(type
, a
));
2056 /* return the pointed type of t */
2057 static inline CType
*pointed_type(CType
*type
)
2059 return &type
->ref
->type
;
2062 /* modify type so that its it is a pointer to type. */
2063 ST_FUNC
void mk_pointer(CType
*type
)
2066 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2067 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2071 /* compare function types. OLD functions match any new functions */
2072 static int is_compatible_func(CType
*type1
, CType
*type2
)
2078 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2080 /* check func_call */
2081 if (FUNC_CALL(s1
->r
) != FUNC_CALL(s2
->r
))
2083 /* XXX: not complete */
2084 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2088 while (s1
!= NULL
) {
2091 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2101 /* return true if type1 and type2 are the same. If unqualified is
2102 true, qualifiers on the types are ignored.
2104 - enums are not checked as gcc __builtin_types_compatible_p ()
2106 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2110 t1
= type1
->t
& VT_TYPE
;
2111 t2
= type2
->t
& VT_TYPE
;
2113 /* strip qualifiers before comparing */
2114 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2115 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2117 /* XXX: bitfields ? */
2120 /* test more complicated cases */
2121 bt1
= t1
& VT_BTYPE
;
2122 if (bt1
== VT_PTR
) {
2123 type1
= pointed_type(type1
);
2124 type2
= pointed_type(type2
);
2125 return is_compatible_types(type1
, type2
);
2126 } else if (bt1
== VT_STRUCT
) {
2127 return (type1
->ref
== type2
->ref
);
2128 } else if (bt1
== VT_FUNC
) {
2129 return is_compatible_func(type1
, type2
);
2135 /* return true if type1 and type2 are exactly the same (including
2138 static int is_compatible_types(CType
*type1
, CType
*type2
)
2140 return compare_types(type1
,type2
,0);
2143 /* return true if type1 and type2 are the same (ignoring qualifiers).
2145 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2147 return compare_types(type1
,type2
,1);
2150 /* print a type. If 'varstr' is not NULL, then the variable is also
2151 printed in the type */
2153 /* XXX: add array and function pointers */
2154 static void type_to_str(char *buf
, int buf_size
,
2155 CType
*type
, const char *varstr
)
2162 t
= type
->t
& VT_TYPE
;
2165 if (t
& VT_CONSTANT
)
2166 pstrcat(buf
, buf_size
, "const ");
2167 if (t
& VT_VOLATILE
)
2168 pstrcat(buf
, buf_size
, "volatile ");
2169 if (t
& VT_UNSIGNED
)
2170 pstrcat(buf
, buf_size
, "unsigned ");
2200 tstr
= "long double";
2202 pstrcat(buf
, buf_size
, tstr
);
2206 if (bt
== VT_STRUCT
)
2210 pstrcat(buf
, buf_size
, tstr
);
2211 v
= type
->ref
->v
& ~SYM_STRUCT
;
2212 if (v
>= SYM_FIRST_ANOM
)
2213 pstrcat(buf
, buf_size
, "<anonymous>");
2215 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2219 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2220 pstrcat(buf
, buf_size
, "(");
2222 while (sa
!= NULL
) {
2223 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2224 pstrcat(buf
, buf_size
, buf1
);
2227 pstrcat(buf
, buf_size
, ", ");
2229 pstrcat(buf
, buf_size
, ")");
2233 pstrcpy(buf1
, sizeof(buf1
), "*");
2235 pstrcat(buf1
, sizeof(buf1
), varstr
);
2236 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2240 pstrcat(buf
, buf_size
, " ");
2241 pstrcat(buf
, buf_size
, varstr
);
2246 /* verify type compatibility to store vtop in 'dt' type, and generate
2248 static void gen_assign_cast(CType
*dt
)
2250 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2251 char buf1
[256], buf2
[256];
2254 st
= &vtop
->type
; /* source type */
2255 dbt
= dt
->t
& VT_BTYPE
;
2256 sbt
= st
->t
& VT_BTYPE
;
2257 if (dt
->t
& VT_CONSTANT
)
2258 warning("assignment of read-only location");
2261 /* special cases for pointers */
2262 /* '0' can also be a pointer */
2263 if (is_null_pointer(vtop
))
2265 /* accept implicit pointer to integer cast with warning */
2266 if (is_integer_btype(sbt
)) {
2267 warning("assignment makes pointer from integer without a cast");
2270 type1
= pointed_type(dt
);
2271 /* a function is implicitely a function pointer */
2272 if (sbt
== VT_FUNC
) {
2273 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2274 !is_compatible_types(pointed_type(dt
), st
))
2275 warning("assignment from incompatible pointer type");
2280 type2
= pointed_type(st
);
2281 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2282 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2283 /* void * can match anything */
2285 /* exact type match, except for unsigned */
2288 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2289 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2290 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2291 warning("assignment from incompatible pointer type");
2293 /* check const and volatile */
2294 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2295 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2296 warning("assignment discards qualifiers from pointer target type");
2302 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2303 warning("assignment makes integer from pointer without a cast");
2305 /* XXX: more tests */
2310 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2311 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2312 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2314 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2315 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2316 error("cannot cast '%s' to '%s'", buf1
, buf2
);
2324 /* store vtop in lvalue pushed on stack */
2325 ST_FUNC
void vstore(void)
2327 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2329 ft
= vtop
[-1].type
.t
;
2330 sbt
= vtop
->type
.t
& VT_BTYPE
;
2331 dbt
= ft
& VT_BTYPE
;
2332 if (((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2333 (sbt
== VT_INT
&& dbt
== VT_SHORT
)) {
2334 /* optimize char/short casts */
2335 delayed_cast
= VT_MUSTCAST
;
2336 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2337 /* XXX: factorize */
2338 if (ft
& VT_CONSTANT
)
2339 warning("assignment of read-only location");
2342 if (!(ft
& VT_BITFIELD
))
2343 gen_assign_cast(&vtop
[-1].type
);
2346 if (sbt
== VT_STRUCT
) {
2347 /* if structure, only generate pointer */
2348 /* structure assignment : generate memcpy */
2349 /* XXX: optimize if small size */
2350 if (!nocode_wanted
) {
2351 size
= type_size(&vtop
->type
, &align
);
2355 vtop
->type
.t
= VT_PTR
;
2358 /* address of memcpy() */
2361 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2362 else if(!(align
& 3))
2363 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2366 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2371 vtop
->type
.t
= VT_PTR
;
2380 /* leave source on stack */
2381 } else if (ft
& VT_BITFIELD
) {
2382 /* bitfield store handling */
2383 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2384 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2385 /* remove bit field info to avoid loops */
2386 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2388 /* duplicate source into other register */
2393 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2394 gen_cast(&vtop
[-1].type
);
2395 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2398 /* duplicate destination */
2400 vtop
[-1] = vtop
[-2];
2402 /* mask and shift source */
2403 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2404 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2405 vpushll((1ULL << bit_size
) - 1ULL);
2407 vpushi((1 << bit_size
) - 1);
2413 /* load destination, mask and or with source */
2415 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2416 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2418 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2425 /* pop off shifted source from "duplicate source..." above */
2429 #ifdef CONFIG_TCC_BCHECK
2430 /* bound check case */
2431 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2437 if (!nocode_wanted
) {
2441 #ifdef TCC_TARGET_X86_64
2442 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2447 r
= gv(rc
); /* generate value */
2448 /* if lvalue was saved on stack, must read it */
2449 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2451 t
= get_reg(RC_INT
);
2452 #ifdef TCC_TARGET_X86_64
2457 sv
.r
= VT_LOCAL
| VT_LVAL
;
2458 sv
.c
.ul
= vtop
[-1].c
.ul
;
2460 vtop
[-1].r
= t
| VT_LVAL
;
2463 #ifndef TCC_TARGET_X86_64
2464 /* two word case handling : store second register at word + 4 */
2465 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2467 /* convert to int to increment easily */
2468 vtop
->type
.t
= VT_INT
;
2474 /* XXX: it works because r2 is spilled last ! */
2475 store(vtop
->r2
, vtop
- 1);
2480 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2481 vtop
->r
|= delayed_cast
;
2485 /* post defines POST/PRE add. c is the token ++ or -- */
2486 ST_FUNC
void inc(int post
, int c
)
2489 vdup(); /* save lvalue */
2491 gv_dup(); /* duplicate value */
2496 vpushi(c
- TOK_MID
);
2498 vstore(); /* store value */
2500 vpop(); /* if post op, return saved value */
2503 /* Parse GNUC __attribute__ extension. Currently, the following
2504 extensions are recognized:
2505 - aligned(n) : set data/function alignment.
2506 - packed : force data alignment to 1
2507 - section(x) : generate data/code in this section.
2508 - unused : currently ignored, but may be used someday.
2509 - regparm(n) : pass function parameters in registers (i386 only)
2511 static void parse_attribute(AttributeDef
*ad
)
2515 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2519 while (tok
!= ')') {
2520 if (tok
< TOK_IDENT
)
2521 expect("attribute name");
2529 expect("section name");
2530 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2538 expect("alias(\"target\")");
2539 ad
->alias_target
= /* save string as token, for later */
2540 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2549 if (n
<= 0 || (n
& (n
- 1)) != 0)
2550 error("alignment must be a positive power of two");
2567 /* currently, no need to handle it because tcc does not
2568 track unused objects */
2572 /* currently, no need to handle it because tcc does not
2573 track unused objects */
2578 ad
->func_call
= FUNC_CDECL
;
2583 ad
->func_call
= FUNC_STDCALL
;
2585 #ifdef TCC_TARGET_I386
2595 ad
->func_call
= FUNC_FASTCALL1
+ n
- 1;
2601 ad
->func_call
= FUNC_FASTCALLW
;
2608 ad
->mode
= VT_LLONG
+ 1;
2611 ad
->mode
= VT_SHORT
+ 1;
2614 ad
->mode
= VT_INT
+ 1;
2617 warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2624 ad
->func_export
= 1;
2627 ad
->func_import
= 1;
2630 if (tcc_state
->warn_unsupported
)
2631 warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2632 /* skip parameters */
2634 int parenthesis
= 0;
2638 else if (tok
== ')')
2641 } while (parenthesis
&& tok
!= -1);
2654 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2655 static void struct_decl(CType
*type
, int u
)
2657 int a
, v
, size
, align
, maxalign
, c
, offset
;
2658 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2659 Sym
*s
, *ss
, *ass
, **ps
;
2663 a
= tok
; /* save decl type */
2668 /* struct already defined ? return it */
2670 expect("struct/union/enum name");
2674 error("invalid type");
2681 /* we put an undefined size for struct/union */
2682 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2683 s
->r
= 0; /* default alignment is zero as gcc */
2684 /* put struct/union/enum name in type */
2692 error("struct/union/enum already defined");
2693 /* cannot be empty */
2695 /* non empty enums are not allowed */
2696 if (a
== TOK_ENUM
) {
2700 expect("identifier");
2706 /* enum symbols have static storage */
2707 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2708 ss
->type
.t
|= VT_STATIC
;
2713 /* NOTE: we accept a trailing comma */
2724 while (tok
!= '}') {
2725 parse_btype(&btype
, &ad
);
2731 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2732 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2733 expect("identifier");
2734 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2735 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2736 error("invalid type for '%s'",
2737 get_tok_str(v
, NULL
));
2741 bit_size
= expr_const();
2742 /* XXX: handle v = 0 case for messages */
2744 error("negative width in bit-field '%s'",
2745 get_tok_str(v
, NULL
));
2746 if (v
&& bit_size
== 0)
2747 error("zero width for bit-field '%s'",
2748 get_tok_str(v
, NULL
));
2750 size
= type_size(&type1
, &align
);
2752 if (align
< ad
.aligned
)
2754 } else if (ad
.packed
) {
2756 } else if (*tcc_state
->pack_stack_ptr
) {
2757 if (align
> *tcc_state
->pack_stack_ptr
)
2758 align
= *tcc_state
->pack_stack_ptr
;
2761 if (bit_size
>= 0) {
2762 bt
= type1
.t
& VT_BTYPE
;
2769 error("bitfields must have scalar type");
2771 if (bit_size
> bsize
) {
2772 error("width of '%s' exceeds its type",
2773 get_tok_str(v
, NULL
));
2774 } else if (bit_size
== bsize
) {
2775 /* no need for bit fields */
2777 } else if (bit_size
== 0) {
2778 /* XXX: what to do if only padding in a
2780 /* zero size: means to pad */
2783 /* we do not have enough room ?
2784 did the type change?
2786 if ((bit_pos
+ bit_size
) > bsize
||
2787 bt
!= prevbt
|| a
== TOK_UNION
)
2790 /* XXX: handle LSB first */
2791 type1
.t
|= VT_BITFIELD
|
2792 (bit_pos
<< VT_STRUCT_SHIFT
) |
2793 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2794 bit_pos
+= bit_size
;
2800 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2801 /* add new memory data only if starting
2803 if (lbit_pos
== 0) {
2804 if (a
== TOK_STRUCT
) {
2805 c
= (c
+ align
- 1) & -align
;
2814 if (align
> maxalign
)
2818 printf("add field %s offset=%d",
2819 get_tok_str(v
, NULL
), offset
);
2820 if (type1
.t
& VT_BITFIELD
) {
2821 printf(" pos=%d size=%d",
2822 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2823 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2828 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2830 while ((ass
= ass
->next
) != NULL
) {
2831 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2836 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2840 if (tok
== ';' || tok
== TOK_EOF
)
2847 /* store size and alignment */
2848 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2854 /* return 0 if no type declaration. otherwise, return the basic type
2857 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2859 int t
, u
, type_found
, typespec_found
, typedef_found
;
2863 memset(ad
, 0, sizeof(AttributeDef
));
2871 /* currently, we really ignore extension */
2881 if ((t
& VT_BTYPE
) != 0)
2882 error("too many basic types");
2898 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
2899 #ifndef TCC_TARGET_PE
2900 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2902 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
2903 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2917 if ((t
& VT_BTYPE
) == VT_LONG
) {
2918 #ifdef TCC_TARGET_PE
2919 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
2921 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2929 struct_decl(&type1
, VT_ENUM
);
2932 type
->ref
= type1
.ref
;
2936 struct_decl(&type1
, VT_STRUCT
);
2939 /* type modifiers */
2992 /* GNUC attribute */
2993 case TOK_ATTRIBUTE1
:
2994 case TOK_ATTRIBUTE2
:
2995 parse_attribute(ad
);
2998 t
= (t
& ~VT_BTYPE
) | u
;
3006 parse_expr_type(&type1
);
3007 /* remove all storage modifiers except typedef */
3008 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3011 if (typespec_found
|| typedef_found
)
3014 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3017 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3018 type
->ref
= s
->type
.ref
;
3020 /* get attributes from typedef */
3021 if (0 == ad
->aligned
)
3022 ad
->aligned
= FUNC_ALIGN(s
->r
);
3023 if (0 == ad
->func_call
)
3024 ad
->func_call
= FUNC_CALL(s
->r
);
3025 ad
->packed
|= FUNC_PACKED(s
->r
);
3034 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
3035 error("signed and unsigned modifier");
3036 if (tcc_state
->char_is_unsigned
) {
3037 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
3042 /* long is never used as type */
3043 if ((t
& VT_BTYPE
) == VT_LONG
)
3044 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3045 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3047 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3053 /* convert a function parameter type (array to pointer and function to
3054 function pointer) */
3055 static inline void convert_parameter_type(CType
*pt
)
3057 /* remove const and volatile qualifiers (XXX: const could be used
3058 to indicate a const function parameter */
3059 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3060 /* array must be transformed to pointer according to ANSI C */
3062 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3067 ST_FUNC
void parse_asm_str(CString
*astr
)
3070 /* read the string */
3072 expect("string constant");
3074 while (tok
== TOK_STR
) {
3075 /* XXX: add \0 handling too ? */
3076 cstr_cat(astr
, tokc
.cstr
->data
);
3079 cstr_ccat(astr
, '\0');
3082 /* Parse an asm label and return the label
3083 * Don't forget to free the CString in the caller! */
3084 static void asm_label_instr(CString
*astr
)
3087 parse_asm_str(astr
);
3090 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3094 static void post_type(CType
*type
, AttributeDef
*ad
)
3096 int n
, l
, t1
, arg_size
, align
;
3097 Sym
**plast
, *s
, *first
;
3102 /* function declaration */
3110 /* read param name and compute offset */
3111 if (l
!= FUNC_OLD
) {
3112 if (!parse_btype(&pt
, &ad1
)) {
3114 error("invalid type");
3121 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3123 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3124 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3125 error("parameter declared as void");
3126 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3131 expect("identifier");
3135 convert_parameter_type(&pt
);
3136 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3142 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3149 /* if no parameters, then old type prototype */
3153 /* NOTE: const is ignored in returned type as it has a special
3154 meaning in gcc / C++ */
3155 type
->t
&= ~VT_CONSTANT
;
3156 /* some ancient pre-K&R C allows a function to return an array
3157 and the array brackets to be put after the arguments, such
3158 that "int c()[]" means something like "int[] c()" */
3161 skip(']'); /* only handle simple "[]" */
3164 /* we push a anonymous symbol which will contain the function prototype */
3165 ad
->func_args
= arg_size
;
3166 s
= sym_push(SYM_FIELD
, type
, INT_ATTR(ad
), l
);
3170 } else if (tok
== '[') {
3171 /* array definition */
3173 if (tok
== TOK_RESTRICT1
)
3178 if (!local_stack
|| nocode_wanted
)
3179 vpushi(expr_const());
3181 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3184 error("invalid array size");
3186 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3187 error("size of variable length array should be an integer");
3192 /* parse next post type */
3193 post_type(type
, ad
);
3194 t1
|= type
->t
& VT_VLA
;
3197 loc
-= type_size(&int_type
, &align
);
3201 vla_runtime_type_size(type
, &align
);
3203 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3210 /* we push an anonymous symbol which will contain the array
3212 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3213 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3218 /* Parse a type declaration (except basic type), and return the type
3219 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3220 expected. 'type' should contain the basic type. 'ad' is the
3221 attribute definition of the basic type. It can be modified by
3224 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3227 CType type1
, *type2
;
3228 int qualifiers
, storage
;
3230 while (tok
== '*') {
3238 qualifiers
|= VT_CONSTANT
;
3243 qualifiers
|= VT_VOLATILE
;
3251 type
->t
|= qualifiers
;
3254 /* XXX: clarify attribute handling */
3255 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3256 parse_attribute(ad
);
3258 /* recursive type */
3259 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3260 type1
.t
= 0; /* XXX: same as int */
3263 /* XXX: this is not correct to modify 'ad' at this point, but
3264 the syntax is not clear */
3265 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3266 parse_attribute(ad
);
3267 type_decl(&type1
, ad
, v
, td
);
3270 /* type identifier */
3271 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3275 if (!(td
& TYPE_ABSTRACT
))
3276 expect("identifier");
3280 storage
= type
->t
& VT_STORAGE
;
3281 type
->t
&= ~VT_STORAGE
;
3282 post_type(type
, ad
);
3284 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3285 parse_attribute(ad
);
3289 /* append type at the end of type1 */
3302 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3303 ST_FUNC
int lvalue_type(int t
)
3308 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3310 else if (bt
== VT_SHORT
)
3314 if (t
& VT_UNSIGNED
)
3315 r
|= VT_LVAL_UNSIGNED
;
3319 /* indirection with full error checking and bound check */
3320 ST_FUNC
void indir(void)
3322 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3323 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3327 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3329 vtop
->type
= *pointed_type(&vtop
->type
);
3330 /* Arrays and functions are never lvalues */
3331 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3332 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3333 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3334 /* if bound checking, the referenced pointer must be checked */
3335 #ifdef CONFIG_TCC_BCHECK
3336 if (tcc_state
->do_bounds_check
)
3337 vtop
->r
|= VT_MUSTBOUND
;
3342 /* pass a parameter to a function and do type checking and casting */
3343 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3348 func_type
= func
->c
;
3349 if (func_type
== FUNC_OLD
||
3350 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3351 /* default casting : only need to convert float to double */
3352 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3356 } else if (arg
== NULL
) {
3357 error("too many arguments to function");
3360 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3361 gen_assign_cast(&type
);
3365 /* parse an expression of the form '(type)' or '(expr)' and return its
3367 static void parse_expr_type(CType
*type
)
3373 if (parse_btype(type
, &ad
)) {
3374 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3381 static void parse_type(CType
*type
)
3386 if (!parse_btype(type
, &ad
)) {
3389 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3392 static void vpush_tokc(int t
)
3397 vsetc(&type
, VT_CONST
, &tokc
);
3400 ST_FUNC
void unary(void)
3402 int n
, t
, align
, size
, r
, sizeof_caller
;
3406 static int in_sizeof
= 0;
3408 sizeof_caller
= in_sizeof
;
3410 /* XXX: GCC 2.95.3 does not generate a table although it should be
3424 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3428 vpush_tokc(VT_LLONG
);
3432 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3436 vpush_tokc(VT_FLOAT
);
3440 vpush_tokc(VT_DOUBLE
);
3444 vpush_tokc(VT_LDOUBLE
);
3447 case TOK___FUNCTION__
:
3449 goto tok_identifier
;
3455 /* special function name identifier */
3456 len
= strlen(funcname
) + 1;
3457 /* generate char[len] type */
3462 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3463 ptr
= section_ptr_add(data_section
, len
);
3464 memcpy(ptr
, funcname
, len
);
3469 #ifdef TCC_TARGET_PE
3470 t
= VT_SHORT
| VT_UNSIGNED
;
3476 /* string parsing */
3479 if (tcc_state
->warn_write_strings
)
3484 memset(&ad
, 0, sizeof(AttributeDef
));
3485 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3490 if (parse_btype(&type
, &ad
)) {
3491 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3493 /* check ISOC99 compound literal */
3495 /* data is allocated locally by default */
3500 /* all except arrays are lvalues */
3501 if (!(type
.t
& VT_ARRAY
))
3502 r
|= lvalue_type(type
.t
);
3503 memset(&ad
, 0, sizeof(AttributeDef
));
3504 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3506 if (sizeof_caller
) {
3513 } else if (tok
== '{') {
3514 /* save all registers */
3516 /* statement expression : we do not accept break/continue
3517 inside as GCC does */
3518 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3533 /* functions names must be treated as function pointers,
3534 except for unary '&' and sizeof. Since we consider that
3535 functions are not lvalues, we only have to handle it
3536 there and in function calls. */
3537 /* arrays can also be used although they are not lvalues */
3538 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3539 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3541 mk_pointer(&vtop
->type
);
3547 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3549 boolean
.t
= VT_BOOL
;
3551 vtop
->c
.i
= !vtop
->c
.i
;
3552 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3553 vtop
->c
.i
= vtop
->c
.i
^ 1;
3556 vseti(VT_JMP
, gtst(1, 0));
3567 /* in order to force cast, we add zero */
3569 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3570 error("pointer not accepted for unary plus");
3580 unary_type(&type
); // Perform a in_sizeof = 0;
3581 size
= type_size(&type
, &align
);
3582 if (t
== TOK_SIZEOF
) {
3583 if (!(type
.t
& VT_VLA
)) {
3585 error("sizeof applied to an incomplete type");
3588 vla_runtime_type_size(&type
, &align
);
3593 vtop
->type
.t
|= VT_UNSIGNED
;
3596 case TOK_builtin_types_compatible_p
:
3605 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3606 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3607 vpushi(is_compatible_types(&type1
, &type2
));
3610 case TOK_builtin_constant_p
:
3612 int saved_nocode_wanted
, res
;
3615 saved_nocode_wanted
= nocode_wanted
;
3618 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3620 nocode_wanted
= saved_nocode_wanted
;
3625 case TOK_builtin_frame_address
:
3630 if (tok
!= TOK_CINT
) {
3631 error("__builtin_frame_address only takes integers");
3634 error("TCC only supports __builtin_frame_address(0)");
3640 vset(&type
, VT_LOCAL
, 0);
3643 #ifdef TCC_TARGET_X86_64
3644 case TOK_builtin_va_arg_types
:
3646 /* This definition must be synced with stdarg.h */
3647 enum __va_arg_type
{
3648 __va_gen_reg
, __va_float_reg
, __va_stack
3656 bt
= type
.t
& VT_BTYPE
;
3657 if (bt
== VT_STRUCT
|| bt
== VT_LDOUBLE
) {
3659 } else if (bt
== VT_FLOAT
|| bt
== VT_DOUBLE
) {
3660 vpushi(__va_float_reg
);
3662 vpushi(__va_gen_reg
);
3682 goto tok_identifier
;
3684 /* allow to take the address of a label */
3685 if (tok
< TOK_UIDENT
)
3686 expect("label identifier");
3687 s
= label_find(tok
);
3689 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3691 if (s
->r
== LABEL_DECLARED
)
3692 s
->r
= LABEL_FORWARD
;
3695 s
->type
.t
= VT_VOID
;
3696 mk_pointer(&s
->type
);
3697 s
->type
.t
|= VT_STATIC
;
3699 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3704 // special qnan , snan and infinity values
3706 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3710 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3714 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3723 expect("identifier");
3727 error("'%s' undeclared", get_tok_str(t
, NULL
));
3728 /* for simple function calls, we tolerate undeclared
3729 external reference to int() function */
3730 if (tcc_state
->warn_implicit_function_declaration
)
3731 warning("implicit declaration of function '%s'",
3732 get_tok_str(t
, NULL
));
3733 s
= external_global_sym(t
, &func_old_type
, 0);
3735 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3736 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3737 /* if referencing an inline function, then we generate a
3738 symbol to it if not already done. It will have the
3739 effect to generate code for it at the end of the
3740 compilation unit. Inline function as always
3741 generated in the text section. */
3743 put_extern_sym(s
, text_section
, 0, 0);
3744 r
= VT_SYM
| VT_CONST
;
3748 vset(&s
->type
, r
, s
->c
);
3749 /* if forward reference, we must point to s */
3750 if (vtop
->r
& VT_SYM
) {
3757 /* post operations */
3759 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3762 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3765 if (tok
== TOK_ARROW
)
3767 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3771 /* expect pointer on structure */
3772 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3773 expect("struct or union");
3777 while ((s
= s
->next
) != NULL
) {
3782 error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3783 /* add field offset to pointer */
3784 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3787 /* change type to field type, and set to lvalue */
3788 vtop
->type
= s
->type
;
3789 vtop
->type
.t
|= qualifiers
;
3790 /* an array is never an lvalue */
3791 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3792 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3793 #ifdef CONFIG_TCC_BCHECK
3794 /* if bound checking, the referenced pointer must be checked */
3795 if (tcc_state
->do_bounds_check
)
3796 vtop
->r
|= VT_MUSTBOUND
;
3800 } else if (tok
== '[') {
3806 } else if (tok
== '(') {
3812 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3813 /* pointer test (no array accepted) */
3814 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3815 vtop
->type
= *pointed_type(&vtop
->type
);
3816 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3820 expect("function pointer");
3823 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3825 /* get return type */
3828 sa
= s
->next
; /* first parameter */
3831 /* compute first implicit argument if a structure is returned */
3832 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3833 /* get some space for the returned structure */
3834 size
= type_size(&s
->type
, &align
);
3835 loc
= (loc
- size
) & -align
;
3837 ret
.r
= VT_LOCAL
| VT_LVAL
;
3838 /* pass it as 'int' to avoid structure arg passing
3840 vseti(VT_LOCAL
, loc
);
3845 /* return in register */
3846 if (is_float(ret
.type
.t
)) {
3847 ret
.r
= reg_fret(ret
.type
.t
);
3849 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
3858 gfunc_param_typed(s
, sa
);
3868 error("too few arguments to function");
3870 if (!nocode_wanted
) {
3871 gfunc_call(nb_args
);
3873 vtop
-= (nb_args
+ 1);
3876 vsetc(&ret
.type
, ret
.r
, &ret
.c
);
3884 ST_FUNC
void expr_prod(void)
3889 while (tok
== '*' || tok
== '/' || tok
== '%') {
3897 ST_FUNC
void expr_sum(void)
3902 while (tok
== '+' || tok
== '-') {
3910 static void expr_shift(void)
3915 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
3923 static void expr_cmp(void)
3928 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
3929 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
3937 static void expr_cmpeq(void)
3942 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
3950 static void expr_and(void)
3953 while (tok
== '&') {
3960 static void expr_xor(void)
3963 while (tok
== '^') {
3970 static void expr_or(void)
3973 while (tok
== '|') {
3980 /* XXX: fix this mess */
3981 static void expr_land_const(void)
3984 while (tok
== TOK_LAND
) {
3991 /* XXX: fix this mess */
3992 static void expr_lor_const(void)
3995 while (tok
== TOK_LOR
) {
4002 /* only used if non constant */
4003 static void expr_land(void)
4008 if (tok
== TOK_LAND
) {
4013 if (tok
!= TOK_LAND
) {
4023 static void expr_lor(void)
4028 if (tok
== TOK_LOR
) {
4033 if (tok
!= TOK_LOR
) {
4043 /* XXX: better constant handling */
4044 static void expr_cond(void)
4046 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4048 CType type
, type1
, type2
;
4055 boolean
.t
= VT_BOOL
;
4061 if (tok
!= ':' || !gnu_ext
) {
4076 if (vtop
!= vstack
) {
4077 /* needed to avoid having different registers saved in
4079 if (is_float(vtop
->type
.t
)) {
4081 #ifdef TCC_TARGET_X86_64
4082 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4092 if (tok
== ':' && gnu_ext
) {
4100 sv
= *vtop
; /* save value to handle it later */
4101 vtop
--; /* no vpop so that FP stack is not flushed */
4109 bt1
= t1
& VT_BTYPE
;
4111 bt2
= t2
& VT_BTYPE
;
4112 /* cast operands to correct type according to ISOC rules */
4113 if (is_float(bt1
) || is_float(bt2
)) {
4114 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4115 type
.t
= VT_LDOUBLE
;
4116 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4121 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4122 /* cast to biggest op */
4124 /* convert to unsigned if it does not fit in a long long */
4125 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4126 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4127 type
.t
|= VT_UNSIGNED
;
4128 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4129 /* XXX: test pointer compatibility */
4131 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4132 /* XXX: test function pointer compatibility */
4134 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4135 /* XXX: test structure compatibility */
4137 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4138 /* NOTE: as an extension, we accept void on only one side */
4141 /* integer operations */
4143 /* convert to unsigned if it does not fit in an integer */
4144 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4145 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4146 type
.t
|= VT_UNSIGNED
;
4149 /* now we convert second operand */
4151 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4154 if (is_float(type
.t
)) {
4156 #ifdef TCC_TARGET_X86_64
4157 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4161 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4162 /* for long longs, we use fixed registers to avoid having
4163 to handle a complicated move */
4168 /* this is horrible, but we must also convert first
4172 /* put again first value and cast it */
4175 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4185 static void expr_eq(void)
4191 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4192 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4193 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4208 ST_FUNC
void gexpr(void)
4219 /* parse an expression and return its type without any side effect. */
4220 static void expr_type(CType
*type
)
4222 int saved_nocode_wanted
;
4224 saved_nocode_wanted
= nocode_wanted
;
4229 nocode_wanted
= saved_nocode_wanted
;
4232 /* parse a unary expression and return its type without any side
4234 static void unary_type(CType
*type
)
4246 /* parse a constant expression and return value in vtop. */
4247 static void expr_const1(void)
4256 /* parse an integer constant and return its value. */
4257 ST_FUNC
int expr_const(void)
4261 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4262 expect("constant expression");
4268 /* return the label token if current token is a label, otherwise
4270 static int is_label(void)
4274 /* fast test first */
4275 if (tok
< TOK_UIDENT
)
4277 /* no need to save tokc because tok is an identifier */
4284 unget_tok(last_tok
);
4289 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4290 int case_reg
, int is_expr
)
4295 /* generate line number info */
4296 if (tcc_state
->do_debug
&&
4297 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4298 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4300 last_line_num
= file
->line_num
;
4304 /* default return value is (void) */
4306 vtop
->type
.t
= VT_VOID
;
4309 if (tok
== TOK_IF
) {
4316 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4318 if (c
== TOK_ELSE
) {
4322 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4323 gsym(d
); /* patch else jmp */
4326 } else if (tok
== TOK_WHILE
) {
4334 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4338 } else if (tok
== '{') {
4342 /* record local declaration stack position */
4344 llabel
= local_label_stack
;
4345 /* handle local labels declarations */
4346 if (tok
== TOK_LABEL
) {
4349 if (tok
< TOK_UIDENT
)
4350 expect("label identifier");
4351 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4361 while (tok
!= '}') {
4366 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4369 /* pop locally defined labels */
4370 label_pop(&local_label_stack
, llabel
);
4372 /* XXX: this solution makes only valgrind happy...
4373 triggered by gcc.c-torture/execute/20000917-1.c */
4375 switch(vtop
->type
.t
& VT_BTYPE
) {
4380 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4382 error("unsupported expression type");
4385 /* pop locally defined symbols */
4386 sym_pop(&local_stack
, s
);
4388 } else if (tok
== TOK_RETURN
) {
4392 gen_assign_cast(&func_vt
);
4393 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4395 /* if returning structure, must copy it to implicit
4396 first pointer arg location */
4399 size
= type_size(&func_vt
,&align
);
4402 if((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& 3))
4406 loc
= (loc
- size
) & -4;
4409 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4412 vset(&int_type
, VT_LOCAL
| VT_LVAL
, addr
);
4414 vtop
->type
= int_type
;
4420 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4423 /* copy structure value to pointer */
4428 } else if (is_float(func_vt
.t
)) {
4429 gv(rc_fret(func_vt
.t
));
4433 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4436 rsym
= gjmp(rsym
); /* jmp */
4437 } else if (tok
== TOK_BREAK
) {
4440 error("cannot break");
4441 *bsym
= gjmp(*bsym
);
4444 } else if (tok
== TOK_CONTINUE
) {
4447 error("cannot continue");
4448 *csym
= gjmp(*csym
);
4451 } else if (tok
== TOK_FOR
) {
4457 /* c99 for-loop init decl? */
4458 if (!decl0(VT_LOCAL
, 1)) {
4459 /* no, regular for-loop init expr */
4483 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4487 sym_pop(&local_stack
, s
);
4489 if (tok
== TOK_DO
) {
4494 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4505 if (tok
== TOK_SWITCH
) {
4509 /* XXX: other types than integer */
4510 case_reg
= gv(RC_INT
);
4514 b
= gjmp(0); /* jump to first case */
4516 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4517 /* if no default, jmp after switch */
4525 if (tok
== TOK_CASE
) {
4532 if (gnu_ext
&& tok
== TOK_DOTS
) {
4536 warning("empty case range");
4538 /* since a case is like a label, we must skip it with a jmp */
4545 *case_sym
= gtst(1, 0);
4548 *case_sym
= gtst(1, 0);
4552 *case_sym
= gtst(1, *case_sym
);
4557 goto block_after_label
;
4559 if (tok
== TOK_DEFAULT
) {
4565 error("too many 'default'");
4568 goto block_after_label
;
4570 if (tok
== TOK_GOTO
) {
4572 if (tok
== '*' && gnu_ext
) {
4576 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4579 } else if (tok
>= TOK_UIDENT
) {
4580 s
= label_find(tok
);
4581 /* put forward definition if needed */
4583 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4585 if (s
->r
== LABEL_DECLARED
)
4586 s
->r
= LABEL_FORWARD
;
4588 /* label already defined */
4589 if (s
->r
& LABEL_FORWARD
)
4590 s
->jnext
= gjmp(s
->jnext
);
4592 gjmp_addr(s
->jnext
);
4595 expect("label identifier");
4598 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4606 if (s
->r
== LABEL_DEFINED
)
4607 error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4609 s
->r
= LABEL_DEFINED
;
4611 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4614 /* we accept this, but it is a mistake */
4617 warning("deprecated use of label at end of compound statement");
4621 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4624 /* expression case */
4639 /* t is the array or struct type. c is the array or struct
4640 address. cur_index/cur_field is the pointer to the current
4641 value. 'size_only' is true if only size info is needed (only used
4643 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4644 int *cur_index
, Sym
**cur_field
,
4648 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4654 if (gnu_ext
&& (l
= is_label()) != 0)
4656 while (tok
== '[' || tok
== '.') {
4658 if (!(type
->t
& VT_ARRAY
))
4659 expect("array type");
4662 index
= expr_const();
4663 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4664 expect("invalid index");
4665 if (tok
== TOK_DOTS
&& gnu_ext
) {
4667 index_last
= expr_const();
4668 if (index_last
< 0 ||
4669 (s
->c
>= 0 && index_last
>= s
->c
) ||
4671 expect("invalid index");
4677 *cur_index
= index_last
;
4678 type
= pointed_type(type
);
4679 elem_size
= type_size(type
, &align
);
4680 c
+= index
* elem_size
;
4681 /* NOTE: we only support ranges for last designator */
4682 nb_elems
= index_last
- index
+ 1;
4683 if (nb_elems
!= 1) {
4692 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4693 expect("struct/union type");
4706 /* XXX: fix this mess by using explicit storage field */
4708 type1
.t
|= (type
->t
& ~VT_TYPE
);
4722 if (type
->t
& VT_ARRAY
) {
4724 type
= pointed_type(type
);
4725 c
+= index
* type_size(type
, &align
);
4729 error("too many field init");
4730 /* XXX: fix this mess by using explicit storage field */
4732 type1
.t
|= (type
->t
& ~VT_TYPE
);
4737 decl_initializer(type
, sec
, c
, 0, size_only
);
4739 /* XXX: make it more general */
4740 if (!size_only
&& nb_elems
> 1) {
4741 unsigned long c_end
;
4746 error("range init not supported yet for dynamic storage");
4747 c_end
= c
+ nb_elems
* elem_size
;
4748 if (c_end
> sec
->data_allocated
)
4749 section_realloc(sec
, c_end
);
4750 src
= sec
->data
+ c
;
4752 for(i
= 1; i
< nb_elems
; i
++) {
4754 memcpy(dst
, src
, elem_size
);
4760 #define EXPR_CONST 1
4763 /* store a value or an expression directly in global data or in local array */
4764 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
4765 int v
, int expr_type
)
4767 int saved_global_expr
, bt
, bit_pos
, bit_size
;
4769 unsigned long long bit_mask
;
4777 /* compound literals must be allocated globally in this case */
4778 saved_global_expr
= global_expr
;
4781 global_expr
= saved_global_expr
;
4782 /* NOTE: symbols are accepted */
4783 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
4784 error("initializer element is not constant");
4792 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
4795 /* XXX: not portable */
4796 /* XXX: generate error if incorrect relocation */
4797 gen_assign_cast(&dtype
);
4798 bt
= type
->t
& VT_BTYPE
;
4799 /* we'll write at most 12 bytes */
4800 if (c
+ 12 > sec
->data_allocated
) {
4801 section_realloc(sec
, c
+ 12);
4803 ptr
= sec
->data
+ c
;
4804 /* XXX: make code faster ? */
4805 if (!(type
->t
& VT_BITFIELD
)) {
4810 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4811 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
4812 bit_mask
= (1LL << bit_size
) - 1;
4814 if ((vtop
->r
& VT_SYM
) &&
4820 (bt
== VT_INT
&& bit_size
!= 32)))
4821 error("initializer element is not computable at load time");
4824 vtop
->c
.i
= (vtop
->c
.i
!= 0);
4826 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4829 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4832 *(double *)ptr
= vtop
->c
.d
;
4835 *(long double *)ptr
= vtop
->c
.ld
;
4838 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
4841 if (vtop
->r
& VT_SYM
) {
4842 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
4844 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4849 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
4856 /* put zeros for variable based init */
4857 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
4860 /* nothing to do because globals are already set to zero */
4862 vpush_global_sym(&func_old_type
, TOK_memset
);
4870 /* 't' contains the type and storage info. 'c' is the offset of the
4871 object in section 'sec'. If 'sec' is NULL, it means stack based
4872 allocation. 'first' is true if array '{' must be read (multi
4873 dimension implicit array init handling). 'size_only' is true if
4874 size only evaluation is wanted (only for arrays). */
4875 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
4876 int first
, int size_only
)
4878 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
4879 int size1
, align1
, expr_type
;
4883 if (type
->t
& VT_VLA
) {
4884 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
4888 vpush_global_sym(&func_old_type
, TOK_alloca
);
4889 vla_runtime_type_size(type
, &a
);
4894 vsetc(type
, REG_IRET
, &retcval
);
4895 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
4900 error("variable length arrays unsupported for this target");
4902 } else if (type
->t
& VT_ARRAY
) {
4906 t1
= pointed_type(type
);
4907 size1
= type_size(t1
, &align1
);
4910 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
4913 error("character array initializer must be a literal,"
4914 " optionally enclosed in braces");
4919 /* only parse strings here if correct type (otherwise: handle
4920 them as ((w)char *) expressions */
4921 if ((tok
== TOK_LSTR
&&
4922 #ifdef TCC_TARGET_PE
4923 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
4925 (t1
->t
& VT_BTYPE
) == VT_INT
4927 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
4928 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
4933 /* compute maximum number of chars wanted */
4935 cstr_len
= cstr
->size
;
4937 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
4940 if (n
>= 0 && nb
> (n
- array_length
))
4941 nb
= n
- array_length
;
4944 warning("initializer-string for array is too long");
4945 /* in order to go faster for common case (char
4946 string in global variable, we handle it
4948 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
4949 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
4953 ch
= ((unsigned char *)cstr
->data
)[i
];
4955 ch
= ((nwchar_t
*)cstr
->data
)[i
];
4956 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
4964 /* only add trailing zero if enough storage (no
4965 warning in this case since it is standard) */
4966 if (n
< 0 || array_length
< n
) {
4968 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
4974 while (tok
!= '}') {
4975 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
4976 if (n
>= 0 && index
>= n
)
4977 error("index too large");
4978 /* must put zero in holes (note that doing it that way
4979 ensures that it even works with designators) */
4980 if (!size_only
&& array_length
< index
) {
4981 init_putz(t1
, sec
, c
+ array_length
* size1
,
4982 (index
- array_length
) * size1
);
4985 if (index
> array_length
)
4986 array_length
= index
;
4987 /* special test for multi dimensional arrays (may not
4988 be strictly correct if designators are used at the
4990 if (index
>= n
&& no_oblock
)
4999 /* put zeros at the end */
5000 if (!size_only
&& n
>= 0 && array_length
< n
) {
5001 init_putz(t1
, sec
, c
+ array_length
* size1
,
5002 (n
- array_length
) * size1
);
5004 /* patch type size if needed */
5006 s
->c
= array_length
;
5007 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5008 (sec
|| !first
|| tok
== '{')) {
5011 /* NOTE: the previous test is a specific case for automatic
5012 struct/union init */
5013 /* XXX: union needs only one init */
5015 /* XXX: this test is incorrect for local initializers
5016 beginning with ( without {. It would be much more difficult
5017 to do it correctly (ideally, the expression parser should
5018 be used in all cases) */
5024 while (tok
== '(') {
5028 if (!parse_btype(&type1
, &ad1
))
5030 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5032 if (!is_assignable_types(type
, &type1
))
5033 error("invalid type for cast");
5038 if (first
|| tok
== '{') {
5047 while (tok
!= '}') {
5048 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5050 if (!size_only
&& array_length
< index
) {
5051 init_putz(type
, sec
, c
+ array_length
,
5052 index
- array_length
);
5054 index
= index
+ type_size(&f
->type
, &align1
);
5055 if (index
> array_length
)
5056 array_length
= index
;
5058 /* gr: skip fields from same union - ugly. */
5060 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5061 /* test for same offset */
5062 if (f
->next
->c
!= f
->c
)
5064 /* if yes, test for bitfield shift */
5065 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5066 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5067 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5068 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5069 if (bit_pos_1
!= bit_pos_2
)
5076 if (no_oblock
&& f
== NULL
)
5082 /* put zeros at the end */
5083 if (!size_only
&& array_length
< n
) {
5084 init_putz(type
, sec
, c
+ array_length
,
5093 } else if (tok
== '{') {
5095 decl_initializer(type
, sec
, c
, first
, size_only
);
5097 } else if (size_only
) {
5098 /* just skip expression */
5099 parlevel
= parlevel1
= 0;
5100 while ((parlevel
> 0 || parlevel1
> 0 ||
5101 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5104 else if (tok
== ')')
5106 else if (tok
== '{')
5108 else if (tok
== '}')
5113 /* currently, we always use constant expression for globals
5114 (may change for scripting case) */
5115 expr_type
= EXPR_CONST
;
5117 expr_type
= EXPR_ANY
;
5118 init_putv(type
, sec
, c
, 0, expr_type
);
5122 /* parse an initializer for type 't' if 'has_init' is non zero, and
5123 allocate space in local or global data space ('r' is either
5124 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5125 variable 'v' with an associated name represented by 'asm_label' of
5126 scope 'scope' is declared before initializers are parsed. If 'v' is
5127 zero, then a reference to the new object is put in the value stack.
5128 If 'has_init' is 2, a special parsing is done to handle string
5130 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5131 int has_init
, int v
, char *asm_label
,
5134 int size
, align
, addr
, data_offset
;
5136 ParseState saved_parse_state
= {0};
5137 TokenString init_str
;
5139 Sym
*flexible_array
;
5141 flexible_array
= NULL
;
5142 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5145 while (field
&& field
->next
)
5146 field
= field
->next
;
5147 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5148 flexible_array
= field
;
5151 size
= type_size(type
, &align
);
5152 /* If unknown size, we must evaluate it before
5153 evaluating initializers because
5154 initializers can generate global data too
5155 (e.g. string pointers or ISOC99 compound
5156 literals). It also simplifies local
5157 initializers handling */
5158 tok_str_new(&init_str
);
5159 if (size
< 0 || (flexible_array
&& has_init
)) {
5161 error("unknown type size");
5162 /* get all init string */
5163 if (has_init
== 2) {
5164 /* only get strings */
5165 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5166 tok_str_add_tok(&init_str
);
5171 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5173 error("unexpected end of file in initializer");
5174 tok_str_add_tok(&init_str
);
5177 else if (tok
== '}') {
5187 tok_str_add(&init_str
, -1);
5188 tok_str_add(&init_str
, 0);
5191 save_parse_state(&saved_parse_state
);
5193 macro_ptr
= init_str
.str
;
5195 decl_initializer(type
, NULL
, 0, 1, 1);
5196 /* prepare second initializer parsing */
5197 macro_ptr
= init_str
.str
;
5200 /* if still unknown size, error */
5201 size
= type_size(type
, &align
);
5203 error("unknown type size");
5206 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5207 /* take into account specified alignment if bigger */
5209 if (ad
->aligned
> align
)
5210 align
= ad
->aligned
;
5211 } else if (ad
->packed
) {
5214 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5216 #ifdef CONFIG_TCC_BCHECK
5217 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5221 loc
= (loc
- size
) & -align
;
5223 #ifdef CONFIG_TCC_BCHECK
5224 /* handles bounds */
5225 /* XXX: currently, since we do only one pass, we cannot track
5226 '&' operators, so we add only arrays */
5227 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5228 unsigned long *bounds_ptr
;
5229 /* add padding between regions */
5231 /* then add local bound info */
5232 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5233 bounds_ptr
[0] = addr
;
5234 bounds_ptr
[1] = size
;
5238 /* local variable */
5239 sym_push(v
, type
, r
, addr
);
5241 /* push local reference */
5242 vset(type
, r
, addr
);
5248 if (v
&& scope
== VT_CONST
) {
5249 /* see if the symbol was already defined */
5252 if (!is_compatible_types(&sym
->type
, type
))
5253 error("incompatible types for redefinition of '%s'",
5254 get_tok_str(v
, NULL
));
5255 if (sym
->type
.t
& VT_EXTERN
) {
5256 /* if the variable is extern, it was not allocated */
5257 sym
->type
.t
&= ~VT_EXTERN
;
5258 /* set array size if it was ommited in extern
5260 if ((sym
->type
.t
& VT_ARRAY
) &&
5261 sym
->type
.ref
->c
< 0 &&
5263 sym
->type
.ref
->c
= type
->ref
->c
;
5265 /* we accept several definitions of the same
5266 global variable. this is tricky, because we
5267 must play with the SHN_COMMON type of the symbol */
5268 /* XXX: should check if the variable was already
5269 initialized. It is incorrect to initialized it
5271 /* no init data, we won't add more to the symbol */
5278 /* allocate symbol in corresponding section */
5283 else if (tcc_state
->nocommon
)
5287 data_offset
= sec
->data_offset
;
5288 data_offset
= (data_offset
+ align
- 1) & -align
;
5290 /* very important to increment global pointer at this time
5291 because initializers themselves can create new initializers */
5292 data_offset
+= size
;
5293 #ifdef CONFIG_TCC_BCHECK
5294 /* add padding if bound check */
5295 if (tcc_state
->do_bounds_check
)
5298 sec
->data_offset
= data_offset
;
5299 /* allocate section space to put the data */
5300 if (sec
->sh_type
!= SHT_NOBITS
&&
5301 data_offset
> sec
->data_allocated
)
5302 section_realloc(sec
, data_offset
);
5303 /* align section if needed */
5304 if (align
> sec
->sh_addralign
)
5305 sec
->sh_addralign
= align
;
5307 addr
= 0; /* avoid warning */
5311 if (scope
!= VT_CONST
|| !sym
) {
5312 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5313 sym
->asm_label
= asm_label
;
5315 /* update symbol definition */
5317 put_extern_sym(sym
, sec
, addr
, size
);
5320 /* put a common area */
5321 put_extern_sym(sym
, NULL
, align
, size
);
5322 /* XXX: find a nicer way */
5323 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5324 esym
->st_shndx
= SHN_COMMON
;
5329 /* push global reference */
5330 sym
= get_sym_ref(type
, sec
, addr
, size
);
5332 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5335 /* patch symbol weakness */
5336 if (type
->t
& VT_WEAK
)
5338 #ifdef CONFIG_TCC_BCHECK
5339 /* handles bounds now because the symbol must be defined
5340 before for the relocation */
5341 if (tcc_state
->do_bounds_check
) {
5342 unsigned long *bounds_ptr
;
5344 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5345 /* then add global bound info */
5346 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5347 bounds_ptr
[0] = 0; /* relocated */
5348 bounds_ptr
[1] = size
;
5352 if (has_init
|| (type
->t
& VT_VLA
)) {
5353 decl_initializer(type
, sec
, addr
, 1, 0);
5354 /* restore parse state if needed */
5356 tok_str_free(init_str
.str
);
5357 restore_parse_state(&saved_parse_state
);
5359 /* patch flexible array member size back to -1, */
5360 /* for possible subsequent similar declarations */
5362 flexible_array
->type
.ref
->c
= -1;
5367 static void put_func_debug(Sym
*sym
)
5372 /* XXX: we put here a dummy type */
5373 snprintf(buf
, sizeof(buf
), "%s:%c1",
5374 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5375 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5376 cur_text_section
, sym
->c
);
5377 /* //gr gdb wants a line at the function */
5378 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5383 /* parse an old style function declaration list */
5384 /* XXX: check multiple parameter */
5385 static void func_decl_list(Sym
*func_sym
)
5392 /* parse each declaration */
5393 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5394 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5395 if (!parse_btype(&btype
, &ad
))
5396 expect("declaration list");
5397 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5398 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5400 /* we accept no variable after */
5404 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5405 /* find parameter in function parameter list */
5408 if ((s
->v
& ~SYM_FIELD
) == v
)
5412 error("declaration for parameter '%s' but no such parameter",
5413 get_tok_str(v
, NULL
));
5415 /* check that no storage specifier except 'register' was given */
5416 if (type
.t
& VT_STORAGE
)
5417 error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5418 convert_parameter_type(&type
);
5419 /* we can add the type (NOTE: it could be local to the function) */
5421 /* accept other parameters */
5432 /* parse a function defined by symbol 'sym' and generate its code in
5433 'cur_text_section' */
5434 static void gen_function(Sym
*sym
)
5436 int saved_nocode_wanted
= nocode_wanted
;
5438 ind
= cur_text_section
->data_offset
;
5439 /* NOTE: we patch the symbol size later */
5440 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5441 funcname
= get_tok_str(sym
->v
, NULL
);
5443 /* put debug symbol */
5444 if (tcc_state
->do_debug
)
5445 put_func_debug(sym
);
5446 /* push a dummy symbol to enable local sym storage */
5447 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5448 gfunc_prolog(&sym
->type
);
5450 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5453 cur_text_section
->data_offset
= ind
;
5454 label_pop(&global_label_stack
, NULL
);
5455 sym_pop(&local_stack
, NULL
); /* reset local stack */
5456 /* end of function */
5457 /* patch symbol size */
5458 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5460 /* patch symbol weakness (this definition overrules any prototype) */
5461 if (sym
->type
.t
& VT_WEAK
)
5463 if (tcc_state
->do_debug
) {
5464 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5466 /* It's better to crash than to generate wrong code */
5467 cur_text_section
= NULL
;
5468 funcname
= ""; /* for safety */
5469 func_vt
.t
= VT_VOID
; /* for safety */
5470 ind
= 0; /* for safety */
5471 nocode_wanted
= saved_nocode_wanted
;
5474 ST_FUNC
void gen_inline_functions(void)
5477 int *str
, inline_generated
, i
;
5478 struct InlineFunc
*fn
;
5480 /* iterate while inline function are referenced */
5482 inline_generated
= 0;
5483 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5484 fn
= tcc_state
->inline_fns
[i
];
5486 if (sym
&& sym
->c
) {
5487 /* the function was used: generate its code and
5488 convert it to a normal function */
5489 str
= fn
->token_str
;
5492 strcpy(file
->filename
, fn
->filename
);
5493 sym
->r
= VT_SYM
| VT_CONST
;
5494 sym
->type
.t
&= ~VT_INLINE
;
5498 cur_text_section
= text_section
;
5500 macro_ptr
= NULL
; /* fail safe */
5502 inline_generated
= 1;
5505 if (!inline_generated
)
5508 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5509 fn
= tcc_state
->inline_fns
[i
];
5510 str
= fn
->token_str
;
5513 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5516 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5517 static int decl0(int l
, int is_for_loop_init
)
5525 if (!parse_btype(&btype
, &ad
)) {
5526 if (is_for_loop_init
)
5528 /* skip redundant ';' */
5529 /* XXX: find more elegant solution */
5534 if (l
== VT_CONST
&&
5535 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5536 /* global asm block */
5540 /* special test for old K&R protos without explicit int
5541 type. Only accepted when defining global data */
5542 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5546 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5547 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5549 /* we accept no variable after */
5553 while (1) { /* iterate thru each declaration */
5554 char *asm_label
; // associated asm label
5556 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5560 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5561 printf("type = '%s'\n", buf
);
5564 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5565 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5566 error("function without file scope cannot be static");
5568 /* if old style function prototype, we accept a
5571 if (sym
->c
== FUNC_OLD
)
5572 func_decl_list(sym
);
5576 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5579 asm_label_instr(&astr
);
5580 asm_label
= tcc_strdup(astr
.data
);
5583 /* parse one last attribute list, after asm label */
5584 parse_attribute(&ad
);
5589 #ifdef TCC_TARGET_PE
5591 type
.t
|= VT_IMPORT
;
5593 type
.t
|= VT_EXPORT
;
5597 error("cannot use local functions");
5598 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5599 expect("function definition");
5601 /* reject abstract declarators in function definition */
5603 while ((sym
= sym
->next
) != NULL
)
5604 if (!(sym
->v
& ~SYM_FIELD
))
5605 expect("identifier");
5607 /* XXX: cannot do better now: convert extern line to static inline */
5608 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5609 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5613 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5616 r
= sym
->type
.ref
->r
;
5617 /* use func_call from prototype if not defined */
5618 if (FUNC_CALL(r
) != FUNC_CDECL
5619 && FUNC_CALL(type
.ref
->r
) == FUNC_CDECL
)
5620 FUNC_CALL(type
.ref
->r
) = FUNC_CALL(r
);
5622 /* use export from prototype */
5624 FUNC_EXPORT(type
.ref
->r
) = 1;
5626 /* use static from prototype */
5627 if (sym
->type
.t
& VT_STATIC
)
5628 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5630 if (!is_compatible_types(&sym
->type
, &type
)) {
5632 error("incompatible types for redefinition of '%s'",
5633 get_tok_str(v
, NULL
));
5635 /* if symbol is already defined, then put complete type */
5638 /* put function symbol */
5639 sym
= global_identifier_push(v
, type
.t
, 0);
5640 sym
->type
.ref
= type
.ref
;
5643 /* static inline functions are just recorded as a kind
5644 of macro. Their code will be emitted at the end of
5645 the compilation unit only if they are used */
5646 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5647 (VT_INLINE
| VT_STATIC
)) {
5648 TokenString func_str
;
5650 struct InlineFunc
*fn
;
5651 const char *filename
;
5653 tok_str_new(&func_str
);
5659 error("unexpected end of file");
5660 tok_str_add_tok(&func_str
);
5665 } else if (t
== '}') {
5667 if (block_level
== 0)
5671 tok_str_add(&func_str
, -1);
5672 tok_str_add(&func_str
, 0);
5673 filename
= file
? file
->filename
: "";
5674 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5675 strcpy(fn
->filename
, filename
);
5677 fn
->token_str
= func_str
.str
;
5678 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5681 /* compute text section */
5682 cur_text_section
= ad
.section
;
5683 if (!cur_text_section
)
5684 cur_text_section
= text_section
;
5685 sym
->r
= VT_SYM
| VT_CONST
;
5690 if (btype
.t
& VT_TYPEDEF
) {
5691 /* save typedefed type */
5692 /* XXX: test storage specifiers ? */
5693 sym
= sym_push(v
, &type
, INT_ATTR(&ad
), 0);
5694 sym
->type
.t
|= VT_TYPEDEF
;
5697 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5698 /* external function definition */
5699 /* specific case for func_call attribute */
5700 type
.ref
->r
= INT_ATTR(&ad
);
5701 } else if (!(type
.t
& VT_ARRAY
)) {
5702 /* not lvalue if array */
5703 r
|= lvalue_type(type
.t
);
5705 has_init
= (tok
== '=');
5706 if (has_init
&& (type
.t
& VT_VLA
))
5707 error("Variable length array cannot be initialized");
5708 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
5709 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
5710 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
5711 /* external variable or function */
5712 /* NOTE: as GCC, uninitialized global static
5713 arrays of null size are considered as
5715 sym
= external_sym(v
, &type
, r
, asm_label
);
5717 if (type
.t
& VT_WEAK
)
5720 if (ad
.alias_target
) {
5725 alias_target
= sym_find(ad
.alias_target
);
5726 if (!alias_target
|| !alias_target
->c
)
5727 error("unsupported forward __alias__ attribute");
5728 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
5729 tsec
.sh_num
= esym
->st_shndx
;
5730 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
5733 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
5734 if (type
.t
& VT_STATIC
)
5740 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
5744 if (is_for_loop_init
)
5757 ST_FUNC
void decl(int l
)