2 * TCC - Tiny C Compiler
4 * Copyright (c) 2001-2004 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /********************************************************/
24 /* global variables */
26 /* loc : local variable index
27 ind : output code index
29 anon_sym: anonymous symbol index
31 ST_DATA
int rsym
, anon_sym
, ind
, loc
;
33 ST_DATA Section
*text_section
, *data_section
, *bss_section
; /* predefined sections */
34 ST_DATA Section
*cur_text_section
; /* current section where function code is generated */
36 ST_DATA Section
*last_text_section
; /* to handle .previous asm directive */
38 #ifdef CONFIG_TCC_BCHECK
39 /* bound check related sections */
40 ST_DATA Section
*bounds_section
; /* contains global data bound description */
41 ST_DATA Section
*lbounds_section
; /* contains local data bound description */
44 ST_DATA Section
*symtab_section
, *strtab_section
;
46 ST_DATA Section
*stab_section
, *stabstr_section
;
47 ST_DATA Sym
*sym_free_first
;
48 ST_DATA
void **sym_pools
;
49 ST_DATA
int nb_sym_pools
;
51 ST_DATA Sym
*global_stack
;
52 ST_DATA Sym
*local_stack
;
53 ST_DATA Sym
*scope_stack_bottom
;
54 ST_DATA Sym
*define_stack
;
55 ST_DATA Sym
*global_label_stack
;
56 ST_DATA Sym
*local_label_stack
;
58 ST_DATA SValue __vstack
[1+VSTACK_SIZE
], *vtop
;
60 ST_DATA
int const_wanted
; /* true if constant wanted */
61 ST_DATA
int nocode_wanted
; /* true if no code generation wanted for an expression */
62 ST_DATA
int global_expr
; /* true if compound literals must be allocated globally (used during initializers parsing */
63 ST_DATA CType func_vt
; /* current function return type (used by return instruction) */
65 ST_DATA
int last_line_num
, last_ind
, func_ind
; /* debug last line number and pc */
66 ST_DATA
char *funcname
;
68 ST_DATA CType char_pointer_type
, func_old_type
, int_type
, size_type
;
70 /* ------------------------------------------------------------------------- */
71 static void gen_cast(CType
*type
);
72 static inline CType
*pointed_type(CType
*type
);
73 static int is_compatible_types(CType
*type1
, CType
*type2
);
74 static int parse_btype(CType
*type
, AttributeDef
*ad
);
75 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
76 static void parse_expr_type(CType
*type
);
77 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
78 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
, int case_reg
, int is_expr
);
79 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, char *asm_label
, int scope
);
80 static int decl0(int l
, int is_for_loop_init
);
81 static void expr_eq(void);
82 static void unary_type(CType
*type
);
83 static void vla_runtime_type_size(CType
*type
, int *a
);
84 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
85 static void expr_type(CType
*type
);
87 ST_INLN
int is_float(int t
)
91 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
;
94 /* we use our own 'finite' function to avoid potential problems with
95 non standard math libs */
96 /* XXX: endianness dependent */
97 ST_FUNC
int ieee_finite(double d
)
100 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
103 ST_FUNC
void test_lvalue(void)
105 if (!(vtop
->r
& VT_LVAL
))
109 /* ------------------------------------------------------------------------- */
110 /* symbol allocator */
111 static Sym
*__sym_malloc(void)
113 Sym
*sym_pool
, *sym
, *last_sym
;
116 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
117 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
119 last_sym
= sym_free_first
;
121 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
122 sym
->next
= last_sym
;
126 sym_free_first
= last_sym
;
130 static inline Sym
*sym_malloc(void)
133 sym
= sym_free_first
;
135 sym
= __sym_malloc();
136 sym_free_first
= sym
->next
;
140 ST_INLN
void sym_free(Sym
*sym
)
142 sym
->next
= sym_free_first
;
143 tcc_free(sym
->asm_label
);
144 sym_free_first
= sym
;
147 /* push, without hashing */
148 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
151 if (ps
== &local_stack
) {
152 for (s
= *ps
; s
&& s
!= scope_stack_bottom
; s
= s
->prev
)
153 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
&& s
->v
== v
)
154 tcc_error("incompatible types for redefinition of '%s'",
155 get_tok_str(v
, NULL
));
174 /* find a symbol and return its associated structure. 's' is the top
175 of the symbol stack */
176 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
186 /* structure lookup */
187 ST_INLN Sym
*struct_find(int v
)
190 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
192 return table_ident
[v
]->sym_struct
;
195 /* find an identifier */
196 ST_INLN Sym
*sym_find(int v
)
199 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
201 return table_ident
[v
]->sym_identifier
;
204 /* push a given symbol on the symbol stack */
205 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
214 s
= sym_push2(ps
, v
, type
->t
, c
);
215 s
->type
.ref
= type
->ref
;
217 /* don't record fields or anonymous symbols */
219 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
220 /* record symbol in token array */
221 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
223 ps
= &ts
->sym_struct
;
225 ps
= &ts
->sym_identifier
;
232 /* push a global identifier */
233 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
236 s
= sym_push2(&global_stack
, v
, t
, c
);
237 /* don't record anonymous symbol */
238 if (v
< SYM_FIRST_ANOM
) {
239 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
240 /* modify the top most local identifier, so that
241 sym_identifier will point to 's' when popped */
243 ps
= &(*ps
)->prev_tok
;
250 /* pop symbols until top reaches 'b' */
251 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
261 /* remove symbol in token array */
263 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
264 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
266 ps
= &ts
->sym_struct
;
268 ps
= &ts
->sym_identifier
;
277 static void weaken_symbol(Sym
*sym
)
279 sym
->type
.t
|= VT_WEAK
;
284 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
285 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
286 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
290 /* ------------------------------------------------------------------------- */
292 ST_FUNC
void swap(int *p
, int *q
)
300 static void vsetc(CType
*type
, int r
, CValue
*vc
)
304 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
305 tcc_error("memory full");
306 /* cannot let cpu flags if other instruction are generated. Also
307 avoid leaving VT_JMP anywhere except on the top of the stack
308 because it would complicate the code generator. */
309 if (vtop
>= vstack
) {
310 v
= vtop
->r
& VT_VALMASK
;
311 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
321 /* push constant of type "type" with useless value */
322 void vpush(CType
*type
)
325 vsetc(type
, VT_CONST
, &cval
);
328 /* push integer constant */
329 ST_FUNC
void vpushi(int v
)
333 vsetc(&int_type
, VT_CONST
, &cval
);
336 /* push a pointer sized constant */
337 static void vpushs(long long v
)
344 vsetc(&size_type
, VT_CONST
, &cval
);
347 /* push arbitrary 64bit constant */
348 void vpush64(int ty
, unsigned long long v
)
355 vsetc(&ctype
, VT_CONST
, &cval
);
358 /* push long long constant */
359 static inline void vpushll(long long v
)
361 vpush64(VT_LLONG
, v
);
364 /* Return a static symbol pointing to a section */
365 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
371 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
372 sym
->type
.ref
= type
->ref
;
373 sym
->r
= VT_CONST
| VT_SYM
;
374 put_extern_sym(sym
, sec
, offset
, size
);
378 /* push a reference to a section offset by adding a dummy symbol */
379 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
384 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
385 vtop
->sym
= get_sym_ref(type
, sec
, offset
, size
);
388 /* define a new external reference to a symbol 'v' of type 'u' */
389 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
395 /* push forward reference */
396 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
397 s
->type
.ref
= type
->ref
;
398 s
->r
= r
| VT_CONST
| VT_SYM
;
403 /* define a new external reference to a symbol 'v' with alternate asm
404 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
405 is no alternate name (most cases) */
406 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
412 /* push forward reference */
413 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
414 s
->asm_label
= asm_label
;
415 s
->type
.t
|= VT_EXTERN
;
416 } else if (s
->type
.ref
== func_old_type
.ref
) {
417 s
->type
.ref
= type
->ref
;
418 s
->r
= r
| VT_CONST
| VT_SYM
;
419 s
->type
.t
|= VT_EXTERN
;
420 } else if (!is_compatible_types(&s
->type
, type
)) {
421 tcc_error("incompatible types for redefinition of '%s'",
422 get_tok_str(v
, NULL
));
427 /* push a reference to global symbol v */
428 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
433 sym
= external_global_sym(v
, type
, 0);
435 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
439 ST_FUNC
void vset(CType
*type
, int r
, int v
)
444 vsetc(type
, r
, &cval
);
447 static void vseti(int r
, int v
)
455 ST_FUNC
void vswap(void)
458 /* cannot let cpu flags if other instruction are generated. Also
459 avoid leaving VT_JMP anywhere except on the top of the stack
460 because it would complicate the code generator. */
461 if (vtop
>= vstack
) {
462 int v
= vtop
->r
& VT_VALMASK
;
463 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
470 /* XXX: +2% overall speed possible with optimized memswap
472 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
476 ST_FUNC
void vpushv(SValue
*v
)
478 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
479 tcc_error("memory full");
484 static void vdup(void)
489 /* save r to the memory stack, and mark it as being free */
490 ST_FUNC
void save_reg(int r
)
492 int l
, saved
, size
, align
;
496 /* modify all stack values */
499 for(p
=vstack
;p
<=vtop
;p
++) {
500 if ((p
->r
& VT_VALMASK
) == r
||
501 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
502 /* must save value on stack if not already done */
504 /* NOTE: must reload 'r' because r might be equal to r2 */
505 r
= p
->r
& VT_VALMASK
;
506 /* store register in the stack */
508 if ((p
->r
& VT_LVAL
) ||
509 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
510 #ifdef TCC_TARGET_X86_64
511 type
= &char_pointer_type
;
515 size
= type_size(type
, &align
);
516 loc
= (loc
- size
) & -align
;
518 sv
.r
= VT_LOCAL
| VT_LVAL
;
521 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
522 /* x86 specific: need to pop fp register ST0 if saved */
524 o(0xd8dd); /* fstp %st(0) */
527 #ifndef TCC_TARGET_X86_64
528 /* special long long case */
529 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
537 /* mark that stack entry as being saved on the stack */
538 if (p
->r
& VT_LVAL
) {
539 /* also clear the bounded flag because the
540 relocation address of the function was stored in
542 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
544 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
552 #ifdef TCC_TARGET_ARM
553 /* find a register of class 'rc2' with at most one reference on stack.
554 * If none, call get_reg(rc) */
555 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
560 for(r
=0;r
<NB_REGS
;r
++) {
561 if (reg_classes
[r
] & rc2
) {
564 for(p
= vstack
; p
<= vtop
; p
++) {
565 if ((p
->r
& VT_VALMASK
) == r
||
566 (p
->r2
& VT_VALMASK
) == r
)
577 /* find a free register of class 'rc'. If none, save one register */
578 ST_FUNC
int get_reg(int rc
)
583 /* find a free register */
584 for(r
=0;r
<NB_REGS
;r
++) {
585 if (reg_classes
[r
] & rc
) {
586 for(p
=vstack
;p
<=vtop
;p
++) {
587 if ((p
->r
& VT_VALMASK
) == r
||
588 (p
->r2
& VT_VALMASK
) == r
)
596 /* no register left : free the first one on the stack (VERY
597 IMPORTANT to start from the bottom to ensure that we don't
598 spill registers used in gen_opi()) */
599 for(p
=vstack
;p
<=vtop
;p
++) {
600 /* look at second register (if long long) */
601 r
= p
->r2
& VT_VALMASK
;
602 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
604 r
= p
->r
& VT_VALMASK
;
605 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
611 /* Should never comes here */
615 /* save registers up to (vtop - n) stack entry */
616 ST_FUNC
void save_regs(int n
)
621 for(p
= vstack
;p
<= p1
; p
++) {
622 r
= p
->r
& VT_VALMASK
;
629 /* move register 's' to 'r', and flush previous value of r to memory
631 static void move_reg(int r
, int s
)
644 /* get address of vtop (vtop MUST BE an lvalue) */
645 static void gaddrof(void)
647 if (vtop
->r
& VT_REF
)
650 /* tricky: if saved lvalue, then we can go back to lvalue */
651 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
652 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
657 #ifdef CONFIG_TCC_BCHECK
658 /* generate lvalue bound code */
659 static void gbound(void)
664 vtop
->r
&= ~VT_MUSTBOUND
;
665 /* if lvalue, then use checking code before dereferencing */
666 if (vtop
->r
& VT_LVAL
) {
667 /* if not VT_BOUNDED value, then make one */
668 if (!(vtop
->r
& VT_BOUNDED
)) {
669 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
670 /* must save type because we must set it to int to get pointer */
672 vtop
->type
.t
= VT_INT
;
675 gen_bounded_ptr_add();
676 vtop
->r
|= lval_type
;
679 /* then check for dereferencing */
680 gen_bounded_ptr_deref();
685 /* store vtop a register belonging to class 'rc'. lvalues are
686 converted to values. Cannot be used if cannot be converted to
687 register value (such as structures). */
688 ST_FUNC
int gv(int rc
)
690 int r
, bit_pos
, bit_size
, size
, align
, i
;
691 #ifndef TCC_TARGET_X86_64
695 /* NOTE: get_reg can modify vstack[] */
696 if (vtop
->type
.t
& VT_BITFIELD
) {
699 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
700 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
701 /* remove bit field info to avoid loops */
702 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
703 /* cast to int to propagate signedness in following ops */
704 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
709 if((vtop
->type
.t
& VT_UNSIGNED
) ||
710 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
711 type
.t
|= VT_UNSIGNED
;
713 /* generate shifts */
714 vpushi(bits
- (bit_pos
+ bit_size
));
716 vpushi(bits
- bit_size
);
717 /* NOTE: transformed to SHR if unsigned */
721 if (is_float(vtop
->type
.t
) &&
722 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
725 unsigned long offset
;
726 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
730 /* XXX: unify with initializers handling ? */
731 /* CPUs usually cannot use float constants, so we store them
732 generically in data segment */
733 size
= type_size(&vtop
->type
, &align
);
734 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
735 data_section
->data_offset
= offset
;
736 /* XXX: not portable yet */
737 #if defined(__i386__) || defined(__x86_64__)
738 /* Zero pad x87 tenbyte long doubles */
739 if (size
== LDOUBLE_SIZE
) {
740 vtop
->c
.tab
[2] &= 0xffff;
741 #if LDOUBLE_SIZE == 16
746 ptr
= section_ptr_add(data_section
, size
);
748 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
752 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
756 ptr
[i
] = vtop
->c
.tab
[i
];
757 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
758 vtop
->r
|= VT_LVAL
| VT_SYM
;
762 #ifdef CONFIG_TCC_BCHECK
763 if (vtop
->r
& VT_MUSTBOUND
)
767 r
= vtop
->r
& VT_VALMASK
;
768 #ifndef TCC_TARGET_X86_64
773 /* need to reload if:
775 - lvalue (need to dereference pointer)
776 - already a register, but not in the right class */
778 || (vtop
->r
& VT_LVAL
)
779 || !(reg_classes
[r
] & rc
)
780 #ifndef TCC_TARGET_X86_64
781 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
786 #ifndef TCC_TARGET_X86_64
787 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
789 unsigned long long ll
;
790 /* two register type load : expand to two words
792 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
795 vtop
->c
.ui
= ll
; /* first word */
797 vtop
->r
= r
; /* save register value */
798 vpushi(ll
>> 32); /* second word */
799 } else if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
800 (vtop
->r
& VT_LVAL
)) {
801 /* We do not want to modifier the long long
802 pointer here, so the safest (and less
803 efficient) is to save all the other registers
804 in the stack. XXX: totally inefficient. */
806 /* load from memory */
809 vtop
[-1].r
= r
; /* save register value */
810 /* increment pointer to get second word */
811 vtop
->type
.t
= VT_INT
;
820 vtop
[-1].r
= r
; /* save register value */
821 vtop
->r
= vtop
[-1].r2
;
823 /* Allocate second register. Here we rely on the fact that
824 get_reg() tries first to free r2 of an SValue. */
828 /* write second register */
832 if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
834 /* lvalue of scalar type : need to use lvalue type
835 because of possible cast */
838 /* compute memory access type */
839 if (vtop
->r
& VT_LVAL_BYTE
)
841 else if (vtop
->r
& VT_LVAL_SHORT
)
843 if (vtop
->r
& VT_LVAL_UNSIGNED
)
847 /* restore wanted type */
850 /* one register type load */
855 #ifdef TCC_TARGET_C67
856 /* uses register pairs for doubles */
857 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
864 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
865 ST_FUNC
void gv2(int rc1
, int rc2
)
869 /* generate more generic register first. But VT_JMP or VT_CMP
870 values must be generated first in all cases to avoid possible
872 v
= vtop
[0].r
& VT_VALMASK
;
873 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
878 /* test if reload is needed for first register */
879 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
889 /* test if reload is needed for first register */
890 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
896 /* wrapper around RC_FRET to return a register by type */
897 static int rc_fret(int t
)
899 #ifdef TCC_TARGET_X86_64
900 if (t
== VT_LDOUBLE
) {
907 /* wrapper around REG_FRET to return a register by type */
908 static int reg_fret(int t
)
910 #ifdef TCC_TARGET_X86_64
911 if (t
== VT_LDOUBLE
) {
918 /* expand long long on stack in two int registers */
919 static void lexpand(void)
923 u
= vtop
->type
.t
& VT_UNSIGNED
;
926 vtop
[0].r
= vtop
[-1].r2
;
927 vtop
[0].r2
= VT_CONST
;
928 vtop
[-1].r2
= VT_CONST
;
929 vtop
[0].type
.t
= VT_INT
| u
;
930 vtop
[-1].type
.t
= VT_INT
| u
;
933 #ifdef TCC_TARGET_ARM
934 /* expand long long on stack */
935 ST_FUNC
void lexpand_nr(void)
939 u
= vtop
->type
.t
& VT_UNSIGNED
;
942 vtop
->type
.t
= VT_INT
| u
;
943 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
945 vtop
[-1].c
.ui
= vtop
->c
.ull
;
946 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
948 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
950 vtop
->r
= vtop
[-1].r
;
951 } else if (v
> VT_CONST
) {
955 vtop
->r
= vtop
[-1].r2
;
956 vtop
[-1].r2
= VT_CONST
;
957 vtop
[-1].type
.t
= VT_INT
| u
;
961 /* build a long long from two ints */
962 static void lbuild(int t
)
965 vtop
[-1].r2
= vtop
[0].r
;
970 /* rotate n first stack elements to the bottom
971 I1 ... In -> I2 ... In I1 [top is right]
973 ST_FUNC
void vrotb(int n
)
984 /* rotate the n elements before entry e towards the top
985 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
987 ST_FUNC
void vrote(SValue
*e
, int n
)
993 for(i
= 0;i
< n
- 1; i
++)
998 /* rotate n first stack elements to the top
999 I1 ... In -> In I1 ... I(n-1) [top is right]
1001 ST_FUNC
void vrott(int n
)
1006 /* pop stack value */
1007 ST_FUNC
void vpop(void)
1010 v
= vtop
->r
& VT_VALMASK
;
1011 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1012 /* for x86, we need to pop the FP stack */
1013 if (v
== TREG_ST0
&& !nocode_wanted
) {
1014 o(0xd8dd); /* fstp %st(0) */
1017 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1018 /* need to put correct jump if && or || without test */
1024 /* convert stack entry to register and duplicate its value in another
1026 static void gv_dup(void)
1032 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1039 /* stack: H L L1 H1 */
1047 /* duplicate value */
1052 #ifdef TCC_TARGET_X86_64
1053 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1063 load(r1
, &sv
); /* move r to r1 */
1065 /* duplicates value */
1071 #ifndef TCC_TARGET_X86_64
1072 /* generate CPU independent (unsigned) long long operations */
1073 static void gen_opl(int op
)
1075 int t
, a
, b
, op1
, c
, i
;
1077 unsigned short reg_iret
= REG_IRET
;
1078 unsigned short reg_lret
= REG_LRET
;
1084 func
= TOK___divdi3
;
1087 func
= TOK___udivdi3
;
1090 func
= TOK___moddi3
;
1093 func
= TOK___umoddi3
;
1100 /* call generic long long function */
1101 vpush_global_sym(&func_old_type
, func
);
1106 vtop
->r2
= reg_lret
;
1119 /* stack: L1 H1 L2 H2 */
1124 vtop
[-2] = vtop
[-3];
1127 /* stack: H1 H2 L1 L2 */
1133 /* stack: H1 H2 L1 L2 ML MH */
1136 /* stack: ML MH H1 H2 L1 L2 */
1140 /* stack: ML MH H1 L2 H2 L1 */
1145 /* stack: ML MH M1 M2 */
1148 } else if (op
== '+' || op
== '-') {
1149 /* XXX: add non carry method too (for MIPS or alpha) */
1155 /* stack: H1 H2 (L1 op L2) */
1158 gen_op(op1
+ 1); /* TOK_xxxC2 */
1161 /* stack: H1 H2 (L1 op L2) */
1164 /* stack: (L1 op L2) H1 H2 */
1166 /* stack: (L1 op L2) (H1 op H2) */
1174 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1175 t
= vtop
[-1].type
.t
;
1179 /* stack: L H shift */
1181 /* constant: simpler */
1182 /* NOTE: all comments are for SHL. the other cases are
1183 done by swaping words */
1194 if (op
!= TOK_SAR
) {
1227 /* XXX: should provide a faster fallback on x86 ? */
1230 func
= TOK___ashrdi3
;
1233 func
= TOK___lshrdi3
;
1236 func
= TOK___ashldi3
;
1242 /* compare operations */
1248 /* stack: L1 H1 L2 H2 */
1250 vtop
[-1] = vtop
[-2];
1252 /* stack: L1 L2 H1 H2 */
1255 /* when values are equal, we need to compare low words. since
1256 the jump is inverted, we invert the test too. */
1259 else if (op1
== TOK_GT
)
1261 else if (op1
== TOK_ULT
)
1263 else if (op1
== TOK_UGT
)
1268 if (op1
!= TOK_NE
) {
1272 /* generate non equal test */
1273 /* XXX: NOT PORTABLE yet */
1277 #if defined(TCC_TARGET_I386)
1278 b
= psym(0x850f, 0);
1279 #elif defined(TCC_TARGET_ARM)
1281 o(0x1A000000 | encbranch(ind
, 0, 1));
1282 #elif defined(TCC_TARGET_C67)
1283 tcc_error("not implemented");
1285 #error not supported
1289 /* compare low. Always unsigned */
1293 else if (op1
== TOK_LE
)
1295 else if (op1
== TOK_GT
)
1297 else if (op1
== TOK_GE
)
1308 /* handle integer constant optimizations and various machine
1310 static void gen_opic(int op
)
1312 int c1
, c2
, t1
, t2
, n
;
1315 typedef unsigned long long U
;
1319 t1
= v1
->type
.t
& VT_BTYPE
;
1320 t2
= v2
->type
.t
& VT_BTYPE
;
1324 else if (v1
->type
.t
& VT_UNSIGNED
)
1331 else if (v2
->type
.t
& VT_UNSIGNED
)
1336 /* currently, we cannot do computations with forward symbols */
1337 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1338 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1341 case '+': l1
+= l2
; break;
1342 case '-': l1
-= l2
; break;
1343 case '&': l1
&= l2
; break;
1344 case '^': l1
^= l2
; break;
1345 case '|': l1
|= l2
; break;
1346 case '*': l1
*= l2
; break;
1353 /* if division by zero, generate explicit division */
1356 tcc_error("division by zero in constant");
1360 default: l1
/= l2
; break;
1361 case '%': l1
%= l2
; break;
1362 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1363 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1366 case TOK_SHL
: l1
<<= l2
; break;
1367 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1368 case TOK_SAR
: l1
>>= l2
; break;
1370 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1371 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1372 case TOK_EQ
: l1
= l1
== l2
; break;
1373 case TOK_NE
: l1
= l1
!= l2
; break;
1374 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1375 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1376 case TOK_LT
: l1
= l1
< l2
; break;
1377 case TOK_GE
: l1
= l1
>= l2
; break;
1378 case TOK_LE
: l1
= l1
<= l2
; break;
1379 case TOK_GT
: l1
= l1
> l2
; break;
1381 case TOK_LAND
: l1
= l1
&& l2
; break;
1382 case TOK_LOR
: l1
= l1
|| l2
; break;
1389 /* if commutative ops, put c2 as constant */
1390 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1391 op
== '|' || op
== '*')) {
1393 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1394 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1396 /* Filter out NOP operations like x*1, x-0, x&-1... */
1397 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1400 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1401 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1407 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1408 /* try to use shifts instead of muls or divs */
1409 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1418 else if (op
== TOK_PDIV
)
1424 } else if (c2
&& (op
== '+' || op
== '-') &&
1425 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1426 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1427 /* symbol + constant case */
1434 if (!nocode_wanted
) {
1435 /* call low level op generator */
1436 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1447 /* generate a floating point operation with constant propagation */
1448 static void gen_opif(int op
)
1456 /* currently, we cannot do computations with forward symbols */
1457 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1458 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1460 if (v1
->type
.t
== VT_FLOAT
) {
1463 } else if (v1
->type
.t
== VT_DOUBLE
) {
1471 /* NOTE: we only do constant propagation if finite number (not
1472 NaN or infinity) (ANSI spec) */
1473 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1477 case '+': f1
+= f2
; break;
1478 case '-': f1
-= f2
; break;
1479 case '*': f1
*= f2
; break;
1483 tcc_error("division by zero in constant");
1488 /* XXX: also handles tests ? */
1492 /* XXX: overflow test ? */
1493 if (v1
->type
.t
== VT_FLOAT
) {
1495 } else if (v1
->type
.t
== VT_DOUBLE
) {
1503 if (!nocode_wanted
) {
1511 static int pointed_size(CType
*type
)
1514 return type_size(pointed_type(type
), &align
);
1517 static void vla_runtime_pointed_size(CType
*type
)
1520 vla_runtime_type_size(pointed_type(type
), &align
);
1523 static inline int is_null_pointer(SValue
*p
)
1525 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1527 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1528 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0) ||
1529 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&& p
->c
.ptr
== 0);
1532 static inline int is_integer_btype(int bt
)
1534 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1535 bt
== VT_INT
|| bt
== VT_LLONG
);
1538 /* check types for comparison or substraction of pointers */
1539 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1541 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1544 /* null pointers are accepted for all comparisons as gcc */
1545 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1549 bt1
= type1
->t
& VT_BTYPE
;
1550 bt2
= type2
->t
& VT_BTYPE
;
1551 /* accept comparison between pointer and integer with a warning */
1552 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1553 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1554 tcc_warning("comparison between pointer and integer");
1558 /* both must be pointers or implicit function pointers */
1559 if (bt1
== VT_PTR
) {
1560 type1
= pointed_type(type1
);
1561 } else if (bt1
!= VT_FUNC
)
1562 goto invalid_operands
;
1564 if (bt2
== VT_PTR
) {
1565 type2
= pointed_type(type2
);
1566 } else if (bt2
!= VT_FUNC
) {
1568 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1570 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1571 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1575 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1576 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1577 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1578 /* gcc-like error if '-' is used */
1580 goto invalid_operands
;
1582 tcc_warning("comparison of distinct pointer types lacks a cast");
1586 /* generic gen_op: handles types problems */
1587 ST_FUNC
void gen_op(int op
)
1589 int u
, t1
, t2
, bt1
, bt2
, t
;
1592 t1
= vtop
[-1].type
.t
;
1593 t2
= vtop
[0].type
.t
;
1594 bt1
= t1
& VT_BTYPE
;
1595 bt2
= t2
& VT_BTYPE
;
1597 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1598 /* at least one operand is a pointer */
1599 /* relationnal op: must be both pointers */
1600 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1601 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1602 /* pointers are handled are unsigned */
1603 #ifdef TCC_TARGET_X86_64
1604 t
= VT_LLONG
| VT_UNSIGNED
;
1606 t
= VT_INT
| VT_UNSIGNED
;
1610 /* if both pointers, then it must be the '-' op */
1611 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1613 tcc_error("cannot use pointers here");
1614 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1615 /* XXX: check that types are compatible */
1616 if (vtop
[-1].type
.t
& VT_VLA
) {
1617 vla_runtime_pointed_size(&vtop
[-1].type
);
1619 vpushi(pointed_size(&vtop
[-1].type
));
1623 /* set to integer type */
1624 #ifdef TCC_TARGET_X86_64
1625 vtop
->type
.t
= VT_LLONG
;
1627 vtop
->type
.t
= VT_INT
;
1632 /* exactly one pointer : must be '+' or '-'. */
1633 if (op
!= '-' && op
!= '+')
1634 tcc_error("cannot use pointers here");
1635 /* Put pointer as first operand */
1636 if (bt2
== VT_PTR
) {
1640 type1
= vtop
[-1].type
;
1641 type1
.t
&= ~VT_ARRAY
;
1642 if (vtop
[-1].type
.t
& VT_VLA
)
1643 vla_runtime_pointed_size(&vtop
[-1].type
);
1645 u
= pointed_size(&vtop
[-1].type
);
1647 tcc_error("unknown array element size");
1648 #ifdef TCC_TARGET_X86_64
1651 /* XXX: cast to int ? (long long case) */
1656 #ifdef CONFIG_TCC_BCHECK
1657 /* if evaluating constant expression, no code should be
1658 generated, so no bound check */
1659 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1660 /* if bounded pointers, we generate a special code to
1667 gen_bounded_ptr_add();
1673 /* put again type if gen_opic() swaped operands */
1676 } else if (is_float(bt1
) || is_float(bt2
)) {
1677 /* compute bigger type and do implicit casts */
1678 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1680 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1685 /* floats can only be used for a few operations */
1686 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1687 (op
< TOK_ULT
|| op
> TOK_GT
))
1688 tcc_error("invalid operands for binary operation");
1690 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
1691 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
1692 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
1695 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1696 /* cast to biggest op */
1698 /* convert to unsigned if it does not fit in a long long */
1699 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1700 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1703 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1704 tcc_error("comparison of struct");
1706 /* integer operations */
1708 /* convert to unsigned if it does not fit in an integer */
1709 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1710 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1713 /* XXX: currently, some unsigned operations are explicit, so
1714 we modify them here */
1715 if (t
& VT_UNSIGNED
) {
1722 else if (op
== TOK_LT
)
1724 else if (op
== TOK_GT
)
1726 else if (op
== TOK_LE
)
1728 else if (op
== TOK_GE
)
1735 /* special case for shifts and long long: we keep the shift as
1737 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1744 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1745 /* relationnal op: the result is an int */
1746 vtop
->type
.t
= VT_INT
;
1753 #ifndef TCC_TARGET_ARM
1754 /* generic itof for unsigned long long case */
1755 static void gen_cvt_itof1(int t
)
1757 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1758 (VT_LLONG
| VT_UNSIGNED
)) {
1761 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1762 #if LDOUBLE_SIZE != 8
1763 else if (t
== VT_LDOUBLE
)
1764 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1767 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1771 vtop
->r
= reg_fret(t
);
1778 /* generic ftoi for unsigned long long case */
1779 static void gen_cvt_ftoi1(int t
)
1783 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1784 /* not handled natively */
1785 st
= vtop
->type
.t
& VT_BTYPE
;
1787 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1788 #if LDOUBLE_SIZE != 8
1789 else if (st
== VT_LDOUBLE
)
1790 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1793 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1798 vtop
->r2
= REG_LRET
;
1804 /* force char or short cast */
1805 static void force_charshort_cast(int t
)
1809 /* XXX: add optimization if lvalue : just change type and offset */
1814 if (t
& VT_UNSIGNED
) {
1815 vpushi((1 << bits
) - 1);
1821 /* result must be signed or the SAR is converted to an SHL
1822 This was not the case when "t" was a signed short
1823 and the last value on the stack was an unsigned int */
1824 vtop
->type
.t
&= ~VT_UNSIGNED
;
1830 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1831 static void gen_cast(CType
*type
)
1833 int sbt
, dbt
, sf
, df
, c
, p
;
1835 /* special delayed cast for char/short */
1836 /* XXX: in some cases (multiple cascaded casts), it may still
1838 if (vtop
->r
& VT_MUSTCAST
) {
1839 vtop
->r
&= ~VT_MUSTCAST
;
1840 force_charshort_cast(vtop
->type
.t
);
1843 /* bitfields first get cast to ints */
1844 if (vtop
->type
.t
& VT_BITFIELD
) {
1848 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1849 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1854 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1855 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1857 /* constant case: we can do it now */
1858 /* XXX: in ISOC, cannot do it if error in convert */
1859 if (sbt
== VT_FLOAT
)
1860 vtop
->c
.ld
= vtop
->c
.f
;
1861 else if (sbt
== VT_DOUBLE
)
1862 vtop
->c
.ld
= vtop
->c
.d
;
1865 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1866 if (sbt
& VT_UNSIGNED
)
1867 vtop
->c
.ld
= vtop
->c
.ull
;
1869 vtop
->c
.ld
= vtop
->c
.ll
;
1871 if (sbt
& VT_UNSIGNED
)
1872 vtop
->c
.ld
= vtop
->c
.ui
;
1874 vtop
->c
.ld
= vtop
->c
.i
;
1877 if (dbt
== VT_FLOAT
)
1878 vtop
->c
.f
= (float)vtop
->c
.ld
;
1879 else if (dbt
== VT_DOUBLE
)
1880 vtop
->c
.d
= (double)vtop
->c
.ld
;
1881 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1882 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1883 } else if (sf
&& dbt
== VT_BOOL
) {
1884 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1887 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1888 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1889 vtop
->c
.ll
= vtop
->c
.ull
;
1890 else if (sbt
& VT_UNSIGNED
)
1891 vtop
->c
.ll
= vtop
->c
.ui
;
1892 #ifdef TCC_TARGET_X86_64
1893 else if (sbt
== VT_PTR
)
1896 else if (sbt
!= VT_LLONG
)
1897 vtop
->c
.ll
= vtop
->c
.i
;
1899 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1900 vtop
->c
.ull
= vtop
->c
.ll
;
1901 else if (dbt
== VT_BOOL
)
1902 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1903 else if (dbt
!= VT_LLONG
) {
1905 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1907 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1910 if(dbt
& VT_UNSIGNED
)
1911 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1913 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1916 } else if (p
&& dbt
== VT_BOOL
) {
1919 } else if (!nocode_wanted
) {
1920 /* non constant case: generate code */
1922 /* convert from fp to fp */
1925 /* convert int to fp */
1928 /* convert fp to int */
1929 if (dbt
== VT_BOOL
) {
1933 /* we handle char/short/etc... with generic code */
1934 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1935 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1939 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1940 /* additional cast for char/short... */
1945 #ifndef TCC_TARGET_X86_64
1946 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1947 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1948 /* scalar to long long */
1949 /* machine independent conversion */
1951 /* generate high word */
1952 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
1956 if (sbt
== VT_PTR
) {
1957 /* cast from pointer to int before we apply
1958 shift operation, which pointers don't support*/
1959 gen_cast(&int_type
);
1965 /* patch second register */
1966 vtop
[-1].r2
= vtop
->r
;
1970 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
1971 (dbt
& VT_BTYPE
) == VT_PTR
||
1972 (dbt
& VT_BTYPE
) == VT_FUNC
) {
1973 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
1974 (sbt
& VT_BTYPE
) != VT_PTR
&&
1975 (sbt
& VT_BTYPE
) != VT_FUNC
) {
1976 /* need to convert from 32bit to 64bit */
1978 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
1979 /* x86_64 specific: movslq */
1981 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
1985 } else if (dbt
== VT_BOOL
) {
1986 /* scalar to bool */
1989 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
1990 (dbt
& VT_BTYPE
) == VT_SHORT
) {
1991 if (sbt
== VT_PTR
) {
1992 vtop
->type
.t
= VT_INT
;
1993 tcc_warning("nonportable conversion from pointer to char/short");
1995 force_charshort_cast(dbt
);
1996 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
1998 if (sbt
== VT_LLONG
) {
1999 /* from long long: just take low order word */
2003 /* if lvalue and single word type, nothing to do because
2004 the lvalue already contains the real type size (see
2005 VT_LVAL_xxx constants) */
2008 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2009 /* if we are casting between pointer types,
2010 we must update the VT_LVAL_xxx size */
2011 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2012 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2017 /* return type size as known at compile time. Put alignment at 'a' */
2018 ST_FUNC
int type_size(CType
*type
, int *a
)
2023 bt
= type
->t
& VT_BTYPE
;
2024 if (bt
== VT_STRUCT
) {
2029 } else if (bt
== VT_PTR
) {
2030 if (type
->t
& VT_ARRAY
) {
2034 ts
= type_size(&s
->type
, a
);
2036 if (ts
< 0 && s
->c
< 0)
2044 } else if (bt
== VT_LDOUBLE
) {
2046 return LDOUBLE_SIZE
;
2047 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2048 #ifdef TCC_TARGET_I386
2049 #ifdef TCC_TARGET_PE
2054 #elif defined(TCC_TARGET_ARM)
2064 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2067 } else if (bt
== VT_SHORT
) {
2071 /* char, void, function, _Bool */
2077 /* push type size as known at runtime time on top of value stack. Put
2079 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2081 if (type
->t
& VT_VLA
) {
2082 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2084 vpushi(type_size(type
, a
));
2088 /* return the pointed type of t */
2089 static inline CType
*pointed_type(CType
*type
)
2091 return &type
->ref
->type
;
2094 /* modify type so that its it is a pointer to type. */
2095 ST_FUNC
void mk_pointer(CType
*type
)
2098 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2099 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2103 /* compare function types. OLD functions match any new functions */
2104 static int is_compatible_func(CType
*type1
, CType
*type2
)
2110 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2112 /* check func_call */
2113 if (FUNC_CALL(s1
->r
) != FUNC_CALL(s2
->r
))
2115 /* XXX: not complete */
2116 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2120 while (s1
!= NULL
) {
2123 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2133 /* return true if type1 and type2 are the same. If unqualified is
2134 true, qualifiers on the types are ignored.
2136 - enums are not checked as gcc __builtin_types_compatible_p ()
2138 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2142 t1
= type1
->t
& VT_TYPE
;
2143 t2
= type2
->t
& VT_TYPE
;
2145 /* strip qualifiers before comparing */
2146 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2147 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2149 /* XXX: bitfields ? */
2152 /* test more complicated cases */
2153 bt1
= t1
& VT_BTYPE
;
2154 if (bt1
== VT_PTR
) {
2155 type1
= pointed_type(type1
);
2156 type2
= pointed_type(type2
);
2157 return is_compatible_types(type1
, type2
);
2158 } else if (bt1
== VT_STRUCT
) {
2159 return (type1
->ref
== type2
->ref
);
2160 } else if (bt1
== VT_FUNC
) {
2161 return is_compatible_func(type1
, type2
);
2167 /* return true if type1 and type2 are exactly the same (including
2170 static int is_compatible_types(CType
*type1
, CType
*type2
)
2172 return compare_types(type1
,type2
,0);
2175 /* return true if type1 and type2 are the same (ignoring qualifiers).
2177 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2179 return compare_types(type1
,type2
,1);
2182 /* print a type. If 'varstr' is not NULL, then the variable is also
2183 printed in the type */
2185 /* XXX: add array and function pointers */
2186 static void type_to_str(char *buf
, int buf_size
,
2187 CType
*type
, const char *varstr
)
2194 t
= type
->t
& VT_TYPE
;
2197 if (t
& VT_CONSTANT
)
2198 pstrcat(buf
, buf_size
, "const ");
2199 if (t
& VT_VOLATILE
)
2200 pstrcat(buf
, buf_size
, "volatile ");
2201 if (t
& VT_UNSIGNED
)
2202 pstrcat(buf
, buf_size
, "unsigned ");
2232 tstr
= "long double";
2234 pstrcat(buf
, buf_size
, tstr
);
2238 if (bt
== VT_STRUCT
)
2242 pstrcat(buf
, buf_size
, tstr
);
2243 v
= type
->ref
->v
& ~SYM_STRUCT
;
2244 if (v
>= SYM_FIRST_ANOM
)
2245 pstrcat(buf
, buf_size
, "<anonymous>");
2247 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2251 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2252 pstrcat(buf
, buf_size
, "(");
2254 while (sa
!= NULL
) {
2255 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2256 pstrcat(buf
, buf_size
, buf1
);
2259 pstrcat(buf
, buf_size
, ", ");
2261 pstrcat(buf
, buf_size
, ")");
2265 pstrcpy(buf1
, sizeof(buf1
), "*");
2267 pstrcat(buf1
, sizeof(buf1
), varstr
);
2268 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2272 pstrcat(buf
, buf_size
, " ");
2273 pstrcat(buf
, buf_size
, varstr
);
2278 /* verify type compatibility to store vtop in 'dt' type, and generate
2280 static void gen_assign_cast(CType
*dt
)
2282 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2283 char buf1
[256], buf2
[256];
2286 st
= &vtop
->type
; /* source type */
2287 dbt
= dt
->t
& VT_BTYPE
;
2288 sbt
= st
->t
& VT_BTYPE
;
2290 tcc_error("Cannot assign void value");
2291 if (dt
->t
& VT_CONSTANT
)
2292 tcc_warning("assignment of read-only location");
2295 /* special cases for pointers */
2296 /* '0' can also be a pointer */
2297 if (is_null_pointer(vtop
))
2299 /* accept implicit pointer to integer cast with warning */
2300 if (is_integer_btype(sbt
)) {
2301 tcc_warning("assignment makes pointer from integer without a cast");
2304 type1
= pointed_type(dt
);
2305 /* a function is implicitely a function pointer */
2306 if (sbt
== VT_FUNC
) {
2307 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2308 !is_compatible_types(pointed_type(dt
), st
))
2309 tcc_warning("assignment from incompatible pointer type");
2314 type2
= pointed_type(st
);
2315 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2316 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2317 /* void * can match anything */
2319 /* exact type match, except for unsigned */
2322 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2323 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2324 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2325 tcc_warning("assignment from incompatible pointer type");
2327 /* check const and volatile */
2328 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2329 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2330 tcc_warning("assignment discards qualifiers from pointer target type");
2336 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2337 tcc_warning("assignment makes integer from pointer without a cast");
2339 /* XXX: more tests */
2344 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2345 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2346 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2348 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2349 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2350 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2358 /* store vtop in lvalue pushed on stack */
2359 ST_FUNC
void vstore(void)
2361 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2363 ft
= vtop
[-1].type
.t
;
2364 sbt
= vtop
->type
.t
& VT_BTYPE
;
2365 dbt
= ft
& VT_BTYPE
;
2366 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2367 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2368 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2369 /* optimize char/short casts */
2370 delayed_cast
= VT_MUSTCAST
;
2371 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2372 /* XXX: factorize */
2373 if (ft
& VT_CONSTANT
)
2374 tcc_warning("assignment of read-only location");
2377 if (!(ft
& VT_BITFIELD
))
2378 gen_assign_cast(&vtop
[-1].type
);
2381 if (sbt
== VT_STRUCT
) {
2382 /* if structure, only generate pointer */
2383 /* structure assignment : generate memcpy */
2384 /* XXX: optimize if small size */
2385 if (!nocode_wanted
) {
2386 size
= type_size(&vtop
->type
, &align
);
2390 vtop
->type
.t
= VT_PTR
;
2393 /* address of memcpy() */
2396 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2397 else if(!(align
& 3))
2398 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2401 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2406 vtop
->type
.t
= VT_PTR
;
2415 /* leave source on stack */
2416 } else if (ft
& VT_BITFIELD
) {
2417 /* bitfield store handling */
2418 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2419 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2420 /* remove bit field info to avoid loops */
2421 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2423 /* duplicate source into other register */
2428 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2429 gen_cast(&vtop
[-1].type
);
2430 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2433 /* duplicate destination */
2435 vtop
[-1] = vtop
[-2];
2437 /* mask and shift source */
2438 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2439 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2440 vpushll((1ULL << bit_size
) - 1ULL);
2442 vpushi((1 << bit_size
) - 1);
2448 /* load destination, mask and or with source */
2450 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2451 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2453 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2460 /* pop off shifted source from "duplicate source..." above */
2464 #ifdef CONFIG_TCC_BCHECK
2465 /* bound check case */
2466 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2472 if (!nocode_wanted
) {
2476 #ifdef TCC_TARGET_X86_64
2477 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2482 r
= gv(rc
); /* generate value */
2483 /* if lvalue was saved on stack, must read it */
2484 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2486 t
= get_reg(RC_INT
);
2487 #ifdef TCC_TARGET_X86_64
2492 sv
.r
= VT_LOCAL
| VT_LVAL
;
2493 sv
.c
.ul
= vtop
[-1].c
.ul
;
2495 vtop
[-1].r
= t
| VT_LVAL
;
2498 #ifndef TCC_TARGET_X86_64
2499 /* two word case handling : store second register at word + 4 */
2500 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2502 /* convert to int to increment easily */
2503 vtop
->type
.t
= VT_INT
;
2509 /* XXX: it works because r2 is spilled last ! */
2510 store(vtop
->r2
, vtop
- 1);
2515 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2516 vtop
->r
|= delayed_cast
;
2520 /* post defines POST/PRE add. c is the token ++ or -- */
2521 ST_FUNC
void inc(int post
, int c
)
2524 vdup(); /* save lvalue */
2526 gv_dup(); /* duplicate value */
2531 vpushi(c
- TOK_MID
);
2533 vstore(); /* store value */
2535 vpop(); /* if post op, return saved value */
2538 /* Parse GNUC __attribute__ extension. Currently, the following
2539 extensions are recognized:
2540 - aligned(n) : set data/function alignment.
2541 - packed : force data alignment to 1
2542 - section(x) : generate data/code in this section.
2543 - unused : currently ignored, but may be used someday.
2544 - regparm(n) : pass function parameters in registers (i386 only)
2546 static void parse_attribute(AttributeDef
*ad
)
2550 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2554 while (tok
!= ')') {
2555 if (tok
< TOK_IDENT
)
2556 expect("attribute name");
2564 expect("section name");
2565 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2573 expect("alias(\"target\")");
2574 ad
->alias_target
= /* save string as token, for later */
2575 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2584 if (n
<= 0 || (n
& (n
- 1)) != 0)
2585 tcc_error("alignment must be a positive power of two");
2602 /* currently, no need to handle it because tcc does not
2603 track unused objects */
2607 /* currently, no need to handle it because tcc does not
2608 track unused objects */
2613 ad
->func_call
= FUNC_CDECL
;
2618 ad
->func_call
= FUNC_STDCALL
;
2620 #ifdef TCC_TARGET_I386
2630 ad
->func_call
= FUNC_FASTCALL1
+ n
- 1;
2636 ad
->func_call
= FUNC_FASTCALLW
;
2643 ad
->mode
= VT_LLONG
+ 1;
2646 ad
->mode
= VT_SHORT
+ 1;
2649 ad
->mode
= VT_INT
+ 1;
2652 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2659 ad
->func_export
= 1;
2662 ad
->func_import
= 1;
2665 if (tcc_state
->warn_unsupported
)
2666 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2667 /* skip parameters */
2669 int parenthesis
= 0;
2673 else if (tok
== ')')
2676 } while (parenthesis
&& tok
!= -1);
2689 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2690 static void struct_decl(CType
*type
, int u
)
2692 int a
, v
, size
, align
, maxalign
, c
, offset
;
2693 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2694 Sym
*s
, *ss
, *ass
, **ps
;
2698 a
= tok
; /* save decl type */
2703 /* struct already defined ? return it */
2705 expect("struct/union/enum name");
2709 tcc_error("invalid type");
2716 /* we put an undefined size for struct/union */
2717 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2718 s
->r
= 0; /* default alignment is zero as gcc */
2719 /* put struct/union/enum name in type */
2727 tcc_error("struct/union/enum already defined");
2728 /* cannot be empty */
2730 /* non empty enums are not allowed */
2731 if (a
== TOK_ENUM
) {
2735 expect("identifier");
2741 /* enum symbols have static storage */
2742 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2743 ss
->type
.t
|= VT_STATIC
;
2748 /* NOTE: we accept a trailing comma */
2759 while (tok
!= '}') {
2760 parse_btype(&btype
, &ad
);
2766 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2767 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2768 expect("identifier");
2769 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2770 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2771 tcc_error("invalid type for '%s'",
2772 get_tok_str(v
, NULL
));
2776 bit_size
= expr_const();
2777 /* XXX: handle v = 0 case for messages */
2779 tcc_error("negative width in bit-field '%s'",
2780 get_tok_str(v
, NULL
));
2781 if (v
&& bit_size
== 0)
2782 tcc_error("zero width for bit-field '%s'",
2783 get_tok_str(v
, NULL
));
2785 size
= type_size(&type1
, &align
);
2787 if (align
< ad
.aligned
)
2789 } else if (ad
.packed
) {
2791 } else if (*tcc_state
->pack_stack_ptr
) {
2792 if (align
> *tcc_state
->pack_stack_ptr
)
2793 align
= *tcc_state
->pack_stack_ptr
;
2796 if (bit_size
>= 0) {
2797 bt
= type1
.t
& VT_BTYPE
;
2804 tcc_error("bitfields must have scalar type");
2806 if (bit_size
> bsize
) {
2807 tcc_error("width of '%s' exceeds its type",
2808 get_tok_str(v
, NULL
));
2809 } else if (bit_size
== bsize
) {
2810 /* no need for bit fields */
2812 } else if (bit_size
== 0) {
2813 /* XXX: what to do if only padding in a
2815 /* zero size: means to pad */
2818 /* we do not have enough room ?
2819 did the type change?
2821 if ((bit_pos
+ bit_size
) > bsize
||
2822 bt
!= prevbt
|| a
== TOK_UNION
)
2825 /* XXX: handle LSB first */
2826 type1
.t
|= VT_BITFIELD
|
2827 (bit_pos
<< VT_STRUCT_SHIFT
) |
2828 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2829 bit_pos
+= bit_size
;
2835 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2836 /* add new memory data only if starting
2838 if (lbit_pos
== 0) {
2839 if (a
== TOK_STRUCT
) {
2840 c
= (c
+ align
- 1) & -align
;
2849 if (align
> maxalign
)
2853 printf("add field %s offset=%d",
2854 get_tok_str(v
, NULL
), offset
);
2855 if (type1
.t
& VT_BITFIELD
) {
2856 printf(" pos=%d size=%d",
2857 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2858 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2863 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2865 while ((ass
= ass
->next
) != NULL
) {
2866 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2871 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2875 if (tok
== ';' || tok
== TOK_EOF
)
2882 /* store size and alignment */
2883 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2889 /* return 0 if no type declaration. otherwise, return the basic type
2892 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2894 int t
, u
, type_found
, typespec_found
, typedef_found
;
2898 memset(ad
, 0, sizeof(AttributeDef
));
2906 /* currently, we really ignore extension */
2916 if ((t
& VT_BTYPE
) != 0)
2917 tcc_error("too many basic types");
2933 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
2934 #ifndef TCC_TARGET_PE
2935 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2937 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
2938 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2952 if ((t
& VT_BTYPE
) == VT_LONG
) {
2953 #ifdef TCC_TARGET_PE
2954 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
2956 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2964 struct_decl(&type1
, VT_ENUM
);
2967 type
->ref
= type1
.ref
;
2971 struct_decl(&type1
, VT_STRUCT
);
2974 /* type modifiers */
3027 /* GNUC attribute */
3028 case TOK_ATTRIBUTE1
:
3029 case TOK_ATTRIBUTE2
:
3030 parse_attribute(ad
);
3033 t
= (t
& ~VT_BTYPE
) | u
;
3041 parse_expr_type(&type1
);
3042 /* remove all storage modifiers except typedef */
3043 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3046 if (typespec_found
|| typedef_found
)
3049 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3052 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3053 type
->ref
= s
->type
.ref
;
3055 /* get attributes from typedef */
3056 if (0 == ad
->aligned
)
3057 ad
->aligned
= FUNC_ALIGN(s
->r
);
3058 if (0 == ad
->func_call
)
3059 ad
->func_call
= FUNC_CALL(s
->r
);
3060 ad
->packed
|= FUNC_PACKED(s
->r
);
3069 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
3070 tcc_error("signed and unsigned modifier");
3071 if (tcc_state
->char_is_unsigned
) {
3072 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
3077 /* long is never used as type */
3078 if ((t
& VT_BTYPE
) == VT_LONG
)
3079 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3080 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3082 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3088 /* convert a function parameter type (array to pointer and function to
3089 function pointer) */
3090 static inline void convert_parameter_type(CType
*pt
)
3092 /* remove const and volatile qualifiers (XXX: const could be used
3093 to indicate a const function parameter */
3094 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3095 /* array must be transformed to pointer according to ANSI C */
3097 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3102 ST_FUNC
void parse_asm_str(CString
*astr
)
3105 /* read the string */
3107 expect("string constant");
3109 while (tok
== TOK_STR
) {
3110 /* XXX: add \0 handling too ? */
3111 cstr_cat(astr
, tokc
.cstr
->data
);
3114 cstr_ccat(astr
, '\0');
3117 /* Parse an asm label and return the label
3118 * Don't forget to free the CString in the caller! */
3119 static void asm_label_instr(CString
*astr
)
3122 parse_asm_str(astr
);
3125 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3129 static void post_type(CType
*type
, AttributeDef
*ad
)
3131 int n
, l
, t1
, arg_size
, align
;
3132 Sym
**plast
, *s
, *first
;
3137 /* function declaration */
3145 /* read param name and compute offset */
3146 if (l
!= FUNC_OLD
) {
3147 if (!parse_btype(&pt
, &ad1
)) {
3149 tcc_error("invalid type");
3156 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3158 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3159 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3160 tcc_error("parameter declared as void");
3161 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3166 expect("identifier");
3170 convert_parameter_type(&pt
);
3171 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3177 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3184 /* if no parameters, then old type prototype */
3188 /* NOTE: const is ignored in returned type as it has a special
3189 meaning in gcc / C++ */
3190 type
->t
&= ~VT_CONSTANT
;
3191 /* some ancient pre-K&R C allows a function to return an array
3192 and the array brackets to be put after the arguments, such
3193 that "int c()[]" means something like "int[] c()" */
3196 skip(']'); /* only handle simple "[]" */
3199 /* we push a anonymous symbol which will contain the function prototype */
3200 ad
->func_args
= arg_size
;
3201 s
= sym_push(SYM_FIELD
, type
, INT_ATTR(ad
), l
);
3205 } else if (tok
== '[') {
3206 /* array definition */
3208 if (tok
== TOK_RESTRICT1
)
3213 if (!local_stack
|| nocode_wanted
)
3214 vpushi(expr_const());
3216 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3219 tcc_error("invalid array size");
3221 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3222 tcc_error("size of variable length array should be an integer");
3227 /* parse next post type */
3228 post_type(type
, ad
);
3229 t1
|= type
->t
& VT_VLA
;
3232 loc
-= type_size(&int_type
, &align
);
3236 vla_runtime_type_size(type
, &align
);
3238 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3245 /* we push an anonymous symbol which will contain the array
3247 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3248 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3253 /* Parse a type declaration (except basic type), and return the type
3254 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3255 expected. 'type' should contain the basic type. 'ad' is the
3256 attribute definition of the basic type. It can be modified by
3259 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3262 CType type1
, *type2
;
3263 int qualifiers
, storage
;
3265 while (tok
== '*') {
3273 qualifiers
|= VT_CONSTANT
;
3278 qualifiers
|= VT_VOLATILE
;
3286 type
->t
|= qualifiers
;
3289 /* XXX: clarify attribute handling */
3290 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3291 parse_attribute(ad
);
3293 /* recursive type */
3294 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3295 type1
.t
= 0; /* XXX: same as int */
3298 /* XXX: this is not correct to modify 'ad' at this point, but
3299 the syntax is not clear */
3300 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3301 parse_attribute(ad
);
3302 type_decl(&type1
, ad
, v
, td
);
3305 /* type identifier */
3306 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3310 if (!(td
& TYPE_ABSTRACT
))
3311 expect("identifier");
3315 storage
= type
->t
& VT_STORAGE
;
3316 type
->t
&= ~VT_STORAGE
;
3317 if (storage
& VT_STATIC
) {
3318 int saved_nocode_wanted
= nocode_wanted
;
3320 post_type(type
, ad
);
3321 nocode_wanted
= saved_nocode_wanted
;
3323 post_type(type
, ad
);
3325 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3326 parse_attribute(ad
);
3330 /* append type at the end of type1 */
3343 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3344 ST_FUNC
int lvalue_type(int t
)
3349 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3351 else if (bt
== VT_SHORT
)
3355 if (t
& VT_UNSIGNED
)
3356 r
|= VT_LVAL_UNSIGNED
;
3360 /* indirection with full error checking and bound check */
3361 ST_FUNC
void indir(void)
3363 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3364 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3368 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3370 vtop
->type
= *pointed_type(&vtop
->type
);
3371 /* Arrays and functions are never lvalues */
3372 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3373 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3374 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3375 /* if bound checking, the referenced pointer must be checked */
3376 #ifdef CONFIG_TCC_BCHECK
3377 if (tcc_state
->do_bounds_check
)
3378 vtop
->r
|= VT_MUSTBOUND
;
3383 /* pass a parameter to a function and do type checking and casting */
3384 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3389 func_type
= func
->c
;
3390 if (func_type
== FUNC_OLD
||
3391 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3392 /* default casting : only need to convert float to double */
3393 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3397 } else if (arg
== NULL
) {
3398 tcc_error("too many arguments to function");
3401 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3402 gen_assign_cast(&type
);
3406 /* parse an expression of the form '(type)' or '(expr)' and return its
3408 static void parse_expr_type(CType
*type
)
3414 if (parse_btype(type
, &ad
)) {
3415 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3422 static void parse_type(CType
*type
)
3427 if (!parse_btype(type
, &ad
)) {
3430 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3433 static void vpush_tokc(int t
)
3438 vsetc(&type
, VT_CONST
, &tokc
);
3441 ST_FUNC
void unary(void)
3443 int n
, t
, align
, size
, r
, sizeof_caller
;
3447 static int in_sizeof
= 0;
3449 sizeof_caller
= in_sizeof
;
3451 /* XXX: GCC 2.95.3 does not generate a table although it should be
3465 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3469 vpush_tokc(VT_LLONG
);
3473 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3477 vpush_tokc(VT_FLOAT
);
3481 vpush_tokc(VT_DOUBLE
);
3485 vpush_tokc(VT_LDOUBLE
);
3488 case TOK___FUNCTION__
:
3490 goto tok_identifier
;
3496 /* special function name identifier */
3497 len
= strlen(funcname
) + 1;
3498 /* generate char[len] type */
3503 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3504 ptr
= section_ptr_add(data_section
, len
);
3505 memcpy(ptr
, funcname
, len
);
3510 #ifdef TCC_TARGET_PE
3511 t
= VT_SHORT
| VT_UNSIGNED
;
3517 /* string parsing */
3520 if (tcc_state
->warn_write_strings
)
3525 memset(&ad
, 0, sizeof(AttributeDef
));
3526 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3531 if (parse_btype(&type
, &ad
)) {
3532 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3534 /* check ISOC99 compound literal */
3536 /* data is allocated locally by default */
3541 /* all except arrays are lvalues */
3542 if (!(type
.t
& VT_ARRAY
))
3543 r
|= lvalue_type(type
.t
);
3544 memset(&ad
, 0, sizeof(AttributeDef
));
3545 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3547 if (sizeof_caller
) {
3554 } else if (tok
== '{') {
3555 /* save all registers */
3557 /* statement expression : we do not accept break/continue
3558 inside as GCC does */
3559 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3574 /* functions names must be treated as function pointers,
3575 except for unary '&' and sizeof. Since we consider that
3576 functions are not lvalues, we only have to handle it
3577 there and in function calls. */
3578 /* arrays can also be used although they are not lvalues */
3579 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3580 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3582 mk_pointer(&vtop
->type
);
3588 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3590 boolean
.t
= VT_BOOL
;
3592 vtop
->c
.i
= !vtop
->c
.i
;
3593 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3594 vtop
->c
.i
= vtop
->c
.i
^ 1;
3597 vseti(VT_JMP
, gtst(1, 0));
3608 /* in order to force cast, we add zero */
3610 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3611 tcc_error("pointer not accepted for unary plus");
3621 unary_type(&type
); // Perform a in_sizeof = 0;
3622 size
= type_size(&type
, &align
);
3623 if (t
== TOK_SIZEOF
) {
3624 if (!(type
.t
& VT_VLA
)) {
3626 tcc_error("sizeof applied to an incomplete type");
3629 vla_runtime_type_size(&type
, &align
);
3634 vtop
->type
.t
|= VT_UNSIGNED
;
3637 case TOK_builtin_types_compatible_p
:
3646 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3647 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3648 vpushi(is_compatible_types(&type1
, &type2
));
3651 case TOK_builtin_constant_p
:
3653 int saved_nocode_wanted
, res
;
3656 saved_nocode_wanted
= nocode_wanted
;
3659 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3661 nocode_wanted
= saved_nocode_wanted
;
3666 case TOK_builtin_frame_address
:
3672 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3673 tcc_error("__builtin_frame_address only takes positive integers");
3680 vset(&type
, VT_LOCAL
, 0); /* local frame */
3682 mk_pointer(&vtop
->type
);
3683 indir(); /* -> parent frame */
3687 #ifdef TCC_TARGET_X86_64
3688 case TOK_builtin_va_arg_types
:
3690 /* This definition must be synced with stdarg.h */
3691 enum __va_arg_type
{
3692 __va_gen_reg
, __va_float_reg
, __va_stack
3700 bt
= type
.t
& VT_BTYPE
;
3701 if (bt
== VT_STRUCT
|| bt
== VT_LDOUBLE
) {
3703 } else if (bt
== VT_FLOAT
|| bt
== VT_DOUBLE
) {
3704 vpushi(__va_float_reg
);
3706 vpushi(__va_gen_reg
);
3726 goto tok_identifier
;
3728 /* allow to take the address of a label */
3729 if (tok
< TOK_UIDENT
)
3730 expect("label identifier");
3731 s
= label_find(tok
);
3733 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3735 if (s
->r
== LABEL_DECLARED
)
3736 s
->r
= LABEL_FORWARD
;
3739 s
->type
.t
= VT_VOID
;
3740 mk_pointer(&s
->type
);
3741 s
->type
.t
|= VT_STATIC
;
3743 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3748 // special qnan , snan and infinity values
3750 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3754 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3758 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3767 expect("identifier");
3771 tcc_error("'%s' undeclared", get_tok_str(t
, NULL
));
3772 /* for simple function calls, we tolerate undeclared
3773 external reference to int() function */
3774 if (tcc_state
->warn_implicit_function_declaration
)
3775 tcc_warning("implicit declaration of function '%s'",
3776 get_tok_str(t
, NULL
));
3777 s
= external_global_sym(t
, &func_old_type
, 0);
3779 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3780 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3781 /* if referencing an inline function, then we generate a
3782 symbol to it if not already done. It will have the
3783 effect to generate code for it at the end of the
3784 compilation unit. Inline function as always
3785 generated in the text section. */
3787 put_extern_sym(s
, text_section
, 0, 0);
3788 r
= VT_SYM
| VT_CONST
;
3792 vset(&s
->type
, r
, s
->c
);
3793 /* if forward reference, we must point to s */
3794 if (vtop
->r
& VT_SYM
) {
3801 /* post operations */
3803 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3806 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3809 if (tok
== TOK_ARROW
)
3811 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3815 /* expect pointer on structure */
3816 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3817 expect("struct or union");
3821 while ((s
= s
->next
) != NULL
) {
3826 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3827 /* add field offset to pointer */
3828 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3831 /* change type to field type, and set to lvalue */
3832 vtop
->type
= s
->type
;
3833 vtop
->type
.t
|= qualifiers
;
3834 /* an array is never an lvalue */
3835 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3836 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3837 #ifdef CONFIG_TCC_BCHECK
3838 /* if bound checking, the referenced pointer must be checked */
3839 if (tcc_state
->do_bounds_check
)
3840 vtop
->r
|= VT_MUSTBOUND
;
3844 } else if (tok
== '[') {
3850 } else if (tok
== '(') {
3856 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3857 /* pointer test (no array accepted) */
3858 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3859 vtop
->type
= *pointed_type(&vtop
->type
);
3860 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3864 expect("function pointer");
3867 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3869 /* get return type */
3872 sa
= s
->next
; /* first parameter */
3875 /* compute first implicit argument if a structure is returned */
3876 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3877 /* get some space for the returned structure */
3878 size
= type_size(&s
->type
, &align
);
3879 loc
= (loc
- size
) & -align
;
3881 ret
.r
= VT_LOCAL
| VT_LVAL
;
3882 /* pass it as 'int' to avoid structure arg passing
3884 vseti(VT_LOCAL
, loc
);
3889 /* return in register */
3890 if (is_float(ret
.type
.t
)) {
3891 ret
.r
= reg_fret(ret
.type
.t
);
3893 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
3902 gfunc_param_typed(s
, sa
);
3912 tcc_error("too few arguments to function");
3914 if (!nocode_wanted
) {
3915 gfunc_call(nb_args
);
3917 vtop
-= (nb_args
+ 1);
3920 vsetc(&ret
.type
, ret
.r
, &ret
.c
);
3928 ST_FUNC
void expr_prod(void)
3933 while (tok
== '*' || tok
== '/' || tok
== '%') {
3941 ST_FUNC
void expr_sum(void)
3946 while (tok
== '+' || tok
== '-') {
3954 static void expr_shift(void)
3959 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
3967 static void expr_cmp(void)
3972 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
3973 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
3981 static void expr_cmpeq(void)
3986 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
3994 static void expr_and(void)
3997 while (tok
== '&') {
4004 static void expr_xor(void)
4007 while (tok
== '^') {
4014 static void expr_or(void)
4017 while (tok
== '|') {
4024 /* XXX: fix this mess */
4025 static void expr_land_const(void)
4028 while (tok
== TOK_LAND
) {
4035 /* XXX: fix this mess */
4036 static void expr_lor_const(void)
4039 while (tok
== TOK_LOR
) {
4046 /* only used if non constant */
4047 static void expr_land(void)
4052 if (tok
== TOK_LAND
) {
4057 if (tok
!= TOK_LAND
) {
4067 static void expr_lor(void)
4072 if (tok
== TOK_LOR
) {
4077 if (tok
!= TOK_LOR
) {
4087 /* XXX: better constant handling */
4088 static void expr_cond(void)
4090 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4092 CType type
, type1
, type2
;
4099 boolean
.t
= VT_BOOL
;
4105 if (tok
!= ':' || !gnu_ext
) {
4120 if (vtop
!= vstack
) {
4121 /* needed to avoid having different registers saved in
4123 if (is_float(vtop
->type
.t
)) {
4125 #ifdef TCC_TARGET_X86_64
4126 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4136 if (tok
== ':' && gnu_ext
) {
4144 sv
= *vtop
; /* save value to handle it later */
4145 vtop
--; /* no vpop so that FP stack is not flushed */
4153 bt1
= t1
& VT_BTYPE
;
4155 bt2
= t2
& VT_BTYPE
;
4156 /* cast operands to correct type according to ISOC rules */
4157 if (is_float(bt1
) || is_float(bt2
)) {
4158 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4159 type
.t
= VT_LDOUBLE
;
4160 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4165 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4166 /* cast to biggest op */
4168 /* convert to unsigned if it does not fit in a long long */
4169 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4170 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4171 type
.t
|= VT_UNSIGNED
;
4172 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4173 /* If one is a null ptr constant the result type
4175 if (is_null_pointer (vtop
))
4177 else if (is_null_pointer (&sv
))
4179 /* XXX: test pointer compatibility, C99 has more elaborate
4183 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4184 /* XXX: test function pointer compatibility */
4185 type
= bt1
== VT_FUNC
? type1
: type2
;
4186 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4187 /* XXX: test structure compatibility */
4188 type
= bt1
== VT_STRUCT
? type1
: type2
;
4189 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4190 /* NOTE: as an extension, we accept void on only one side */
4193 /* integer operations */
4195 /* convert to unsigned if it does not fit in an integer */
4196 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4197 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4198 type
.t
|= VT_UNSIGNED
;
4201 /* now we convert second operand */
4203 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4206 if (is_float(type
.t
)) {
4208 #ifdef TCC_TARGET_X86_64
4209 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4213 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4214 /* for long longs, we use fixed registers to avoid having
4215 to handle a complicated move */
4220 /* this is horrible, but we must also convert first
4224 /* put again first value and cast it */
4227 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4237 static void expr_eq(void)
4243 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4244 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4245 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4260 ST_FUNC
void gexpr(void)
4271 /* parse an expression and return its type without any side effect. */
4272 static void expr_type(CType
*type
)
4274 int saved_nocode_wanted
;
4276 saved_nocode_wanted
= nocode_wanted
;
4281 nocode_wanted
= saved_nocode_wanted
;
4284 /* parse a unary expression and return its type without any side
4286 static void unary_type(CType
*type
)
4298 /* parse a constant expression and return value in vtop. */
4299 static void expr_const1(void)
4308 /* parse an integer constant and return its value. */
4309 ST_FUNC
int expr_const(void)
4313 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4314 expect("constant expression");
4320 /* return the label token if current token is a label, otherwise
4322 static int is_label(void)
4326 /* fast test first */
4327 if (tok
< TOK_UIDENT
)
4329 /* no need to save tokc because tok is an identifier */
4336 unget_tok(last_tok
);
4341 static void label_or_decl(int l
)
4345 /* fast test first */
4346 if (tok
>= TOK_UIDENT
)
4348 /* no need to save tokc because tok is an identifier */
4352 unget_tok(last_tok
);
4355 unget_tok(last_tok
);
4360 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4361 int case_reg
, int is_expr
)
4364 Sym
*s
, *frame_bottom
;
4366 /* generate line number info */
4367 if (tcc_state
->do_debug
&&
4368 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4369 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4371 last_line_num
= file
->line_num
;
4375 /* default return value is (void) */
4377 vtop
->type
.t
= VT_VOID
;
4380 if (tok
== TOK_IF
) {
4387 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4389 if (c
== TOK_ELSE
) {
4393 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4394 gsym(d
); /* patch else jmp */
4397 } else if (tok
== TOK_WHILE
) {
4405 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4409 } else if (tok
== '{') {
4413 /* record local declaration stack position */
4415 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4416 frame_bottom
->next
= scope_stack_bottom
;
4417 scope_stack_bottom
= frame_bottom
;
4418 llabel
= local_label_stack
;
4419 /* handle local labels declarations */
4420 if (tok
== TOK_LABEL
) {
4423 if (tok
< TOK_UIDENT
)
4424 expect("label identifier");
4425 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4435 while (tok
!= '}') {
4436 label_or_decl(VT_LOCAL
);
4440 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4443 /* pop locally defined labels */
4444 label_pop(&local_label_stack
, llabel
);
4446 /* XXX: this solution makes only valgrind happy...
4447 triggered by gcc.c-torture/execute/20000917-1.c */
4449 switch(vtop
->type
.t
& VT_BTYPE
) {
4454 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4456 tcc_error("unsupported expression type");
4459 /* pop locally defined symbols */
4460 scope_stack_bottom
= scope_stack_bottom
->next
;
4461 sym_pop(&local_stack
, s
);
4463 } else if (tok
== TOK_RETURN
) {
4467 gen_assign_cast(&func_vt
);
4468 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4470 /* if returning structure, must copy it to implicit
4471 first pointer arg location */
4474 size
= type_size(&func_vt
,&align
);
4477 if((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& 3))
4481 loc
= (loc
- size
) & -4;
4484 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4487 vset(&int_type
, VT_LOCAL
| VT_LVAL
, addr
);
4489 vtop
->type
= int_type
;
4495 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4498 /* copy structure value to pointer */
4503 } else if (is_float(func_vt
.t
)) {
4504 gv(rc_fret(func_vt
.t
));
4508 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4511 rsym
= gjmp(rsym
); /* jmp */
4512 } else if (tok
== TOK_BREAK
) {
4515 tcc_error("cannot break");
4516 *bsym
= gjmp(*bsym
);
4519 } else if (tok
== TOK_CONTINUE
) {
4522 tcc_error("cannot continue");
4523 *csym
= gjmp(*csym
);
4526 } else if (tok
== TOK_FOR
) {
4531 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4532 frame_bottom
->next
= scope_stack_bottom
;
4533 scope_stack_bottom
= frame_bottom
;
4535 /* c99 for-loop init decl? */
4536 if (!decl0(VT_LOCAL
, 1)) {
4537 /* no, regular for-loop init expr */
4561 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4565 scope_stack_bottom
= scope_stack_bottom
->next
;
4566 sym_pop(&local_stack
, s
);
4568 if (tok
== TOK_DO
) {
4573 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4584 if (tok
== TOK_SWITCH
) {
4588 /* XXX: other types than integer */
4589 case_reg
= gv(RC_INT
);
4593 b
= gjmp(0); /* jump to first case */
4595 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4596 /* if no default, jmp after switch */
4604 if (tok
== TOK_CASE
) {
4611 if (gnu_ext
&& tok
== TOK_DOTS
) {
4615 tcc_warning("empty case range");
4617 /* since a case is like a label, we must skip it with a jmp */
4624 *case_sym
= gtst(1, 0);
4627 *case_sym
= gtst(1, 0);
4631 *case_sym
= gtst(1, *case_sym
);
4636 goto block_after_label
;
4638 if (tok
== TOK_DEFAULT
) {
4644 tcc_error("too many 'default'");
4647 goto block_after_label
;
4649 if (tok
== TOK_GOTO
) {
4651 if (tok
== '*' && gnu_ext
) {
4655 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4658 } else if (tok
>= TOK_UIDENT
) {
4659 s
= label_find(tok
);
4660 /* put forward definition if needed */
4662 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4664 if (s
->r
== LABEL_DECLARED
)
4665 s
->r
= LABEL_FORWARD
;
4667 /* label already defined */
4668 if (s
->r
& LABEL_FORWARD
)
4669 s
->jnext
= gjmp(s
->jnext
);
4671 gjmp_addr(s
->jnext
);
4674 expect("label identifier");
4677 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4685 if (s
->r
== LABEL_DEFINED
)
4686 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4688 s
->r
= LABEL_DEFINED
;
4690 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4693 /* we accept this, but it is a mistake */
4696 tcc_warning("deprecated use of label at end of compound statement");
4700 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4703 /* expression case */
4718 /* t is the array or struct type. c is the array or struct
4719 address. cur_index/cur_field is the pointer to the current
4720 value. 'size_only' is true if only size info is needed (only used
4722 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4723 int *cur_index
, Sym
**cur_field
,
4727 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4733 if (gnu_ext
&& (l
= is_label()) != 0)
4735 while (tok
== '[' || tok
== '.') {
4737 if (!(type
->t
& VT_ARRAY
))
4738 expect("array type");
4741 index
= expr_const();
4742 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4743 expect("invalid index");
4744 if (tok
== TOK_DOTS
&& gnu_ext
) {
4746 index_last
= expr_const();
4747 if (index_last
< 0 ||
4748 (s
->c
>= 0 && index_last
>= s
->c
) ||
4750 expect("invalid index");
4756 *cur_index
= index_last
;
4757 type
= pointed_type(type
);
4758 elem_size
= type_size(type
, &align
);
4759 c
+= index
* elem_size
;
4760 /* NOTE: we only support ranges for last designator */
4761 nb_elems
= index_last
- index
+ 1;
4762 if (nb_elems
!= 1) {
4771 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4772 expect("struct/union type");
4785 /* XXX: fix this mess by using explicit storage field */
4787 type1
.t
|= (type
->t
& ~VT_TYPE
);
4801 if (type
->t
& VT_ARRAY
) {
4803 type
= pointed_type(type
);
4804 c
+= index
* type_size(type
, &align
);
4808 tcc_error("too many field init");
4809 /* XXX: fix this mess by using explicit storage field */
4811 type1
.t
|= (type
->t
& ~VT_TYPE
);
4816 decl_initializer(type
, sec
, c
, 0, size_only
);
4818 /* XXX: make it more general */
4819 if (!size_only
&& nb_elems
> 1) {
4820 unsigned long c_end
;
4825 tcc_error("range init not supported yet for dynamic storage");
4826 c_end
= c
+ nb_elems
* elem_size
;
4827 if (c_end
> sec
->data_allocated
)
4828 section_realloc(sec
, c_end
);
4829 src
= sec
->data
+ c
;
4831 for(i
= 1; i
< nb_elems
; i
++) {
4833 memcpy(dst
, src
, elem_size
);
4839 #define EXPR_CONST 1
4842 /* store a value or an expression directly in global data or in local array */
4843 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
4844 int v
, int expr_type
)
4846 int saved_global_expr
, bt
, bit_pos
, bit_size
;
4848 unsigned long long bit_mask
;
4856 /* compound literals must be allocated globally in this case */
4857 saved_global_expr
= global_expr
;
4860 global_expr
= saved_global_expr
;
4861 /* NOTE: symbols are accepted */
4862 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
4863 tcc_error("initializer element is not constant");
4871 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
4874 /* XXX: not portable */
4875 /* XXX: generate error if incorrect relocation */
4876 gen_assign_cast(&dtype
);
4877 bt
= type
->t
& VT_BTYPE
;
4878 /* we'll write at most 12 bytes */
4879 if (c
+ 12 > sec
->data_allocated
) {
4880 section_realloc(sec
, c
+ 12);
4882 ptr
= sec
->data
+ c
;
4883 /* XXX: make code faster ? */
4884 if (!(type
->t
& VT_BITFIELD
)) {
4889 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4890 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
4891 bit_mask
= (1LL << bit_size
) - 1;
4893 if ((vtop
->r
& VT_SYM
) &&
4899 (bt
== VT_INT
&& bit_size
!= 32)))
4900 tcc_error("initializer element is not computable at load time");
4903 vtop
->c
.i
= (vtop
->c
.i
!= 0);
4905 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4908 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4911 *(double *)ptr
= vtop
->c
.d
;
4914 *(long double *)ptr
= vtop
->c
.ld
;
4917 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
4920 if (vtop
->r
& VT_SYM
) {
4921 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
4923 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4928 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
4935 /* put zeros for variable based init */
4936 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
4939 /* nothing to do because globals are already set to zero */
4941 vpush_global_sym(&func_old_type
, TOK_memset
);
4949 /* 't' contains the type and storage info. 'c' is the offset of the
4950 object in section 'sec'. If 'sec' is NULL, it means stack based
4951 allocation. 'first' is true if array '{' must be read (multi
4952 dimension implicit array init handling). 'size_only' is true if
4953 size only evaluation is wanted (only for arrays). */
4954 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
4955 int first
, int size_only
)
4957 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
4958 int size1
, align1
, expr_type
;
4962 if (type
->t
& VT_VLA
) {
4963 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
4967 vpush_global_sym(&func_old_type
, TOK_alloca
);
4968 vla_runtime_type_size(type
, &a
);
4973 vsetc(type
, REG_IRET
, &retcval
);
4974 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
4979 tcc_error("variable length arrays unsupported for this target");
4981 } else if (type
->t
& VT_ARRAY
) {
4985 t1
= pointed_type(type
);
4986 size1
= type_size(t1
, &align1
);
4989 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
4992 tcc_error("character array initializer must be a literal,"
4993 " optionally enclosed in braces");
4998 /* only parse strings here if correct type (otherwise: handle
4999 them as ((w)char *) expressions */
5000 if ((tok
== TOK_LSTR
&&
5001 #ifdef TCC_TARGET_PE
5002 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5004 (t1
->t
& VT_BTYPE
) == VT_INT
5006 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5007 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5012 /* compute maximum number of chars wanted */
5014 cstr_len
= cstr
->size
;
5016 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5019 if (n
>= 0 && nb
> (n
- array_length
))
5020 nb
= n
- array_length
;
5023 tcc_warning("initializer-string for array is too long");
5024 /* in order to go faster for common case (char
5025 string in global variable, we handle it
5027 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5028 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5032 ch
= ((unsigned char *)cstr
->data
)[i
];
5034 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5035 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5043 /* only add trailing zero if enough storage (no
5044 warning in this case since it is standard) */
5045 if (n
< 0 || array_length
< n
) {
5047 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5053 while (tok
!= '}') {
5054 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5055 if (n
>= 0 && index
>= n
)
5056 tcc_error("index too large");
5057 /* must put zero in holes (note that doing it that way
5058 ensures that it even works with designators) */
5059 if (!size_only
&& array_length
< index
) {
5060 init_putz(t1
, sec
, c
+ array_length
* size1
,
5061 (index
- array_length
) * size1
);
5064 if (index
> array_length
)
5065 array_length
= index
;
5066 /* special test for multi dimensional arrays (may not
5067 be strictly correct if designators are used at the
5069 if (index
>= n
&& no_oblock
)
5078 /* put zeros at the end */
5079 if (!size_only
&& n
>= 0 && array_length
< n
) {
5080 init_putz(t1
, sec
, c
+ array_length
* size1
,
5081 (n
- array_length
) * size1
);
5083 /* patch type size if needed */
5085 s
->c
= array_length
;
5086 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5087 (sec
|| !first
|| tok
== '{')) {
5090 /* NOTE: the previous test is a specific case for automatic
5091 struct/union init */
5092 /* XXX: union needs only one init */
5094 /* XXX: this test is incorrect for local initializers
5095 beginning with ( without {. It would be much more difficult
5096 to do it correctly (ideally, the expression parser should
5097 be used in all cases) */
5103 while (tok
== '(') {
5107 if (!parse_btype(&type1
, &ad1
))
5109 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5111 if (!is_assignable_types(type
, &type1
))
5112 tcc_error("invalid type for cast");
5117 if (first
|| tok
== '{') {
5126 while (tok
!= '}') {
5127 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5129 if (!size_only
&& array_length
< index
) {
5130 init_putz(type
, sec
, c
+ array_length
,
5131 index
- array_length
);
5133 index
= index
+ type_size(&f
->type
, &align1
);
5134 if (index
> array_length
)
5135 array_length
= index
;
5137 /* gr: skip fields from same union - ugly. */
5139 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5140 /* test for same offset */
5141 if (f
->next
->c
!= f
->c
)
5143 /* if yes, test for bitfield shift */
5144 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5145 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5146 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5147 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5148 if (bit_pos_1
!= bit_pos_2
)
5155 if (no_oblock
&& f
== NULL
)
5161 /* put zeros at the end */
5162 if (!size_only
&& array_length
< n
) {
5163 init_putz(type
, sec
, c
+ array_length
,
5172 } else if (tok
== '{') {
5174 decl_initializer(type
, sec
, c
, first
, size_only
);
5176 } else if (size_only
) {
5177 /* just skip expression */
5178 parlevel
= parlevel1
= 0;
5179 while ((parlevel
> 0 || parlevel1
> 0 ||
5180 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5183 else if (tok
== ')')
5185 else if (tok
== '{')
5187 else if (tok
== '}')
5192 /* currently, we always use constant expression for globals
5193 (may change for scripting case) */
5194 expr_type
= EXPR_CONST
;
5196 expr_type
= EXPR_ANY
;
5197 init_putv(type
, sec
, c
, 0, expr_type
);
5201 /* parse an initializer for type 't' if 'has_init' is non zero, and
5202 allocate space in local or global data space ('r' is either
5203 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5204 variable 'v' with an associated name represented by 'asm_label' of
5205 scope 'scope' is declared before initializers are parsed. If 'v' is
5206 zero, then a reference to the new object is put in the value stack.
5207 If 'has_init' is 2, a special parsing is done to handle string
5209 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5210 int has_init
, int v
, char *asm_label
,
5213 int size
, align
, addr
, data_offset
;
5215 ParseState saved_parse_state
= {0};
5216 TokenString init_str
;
5218 Sym
*flexible_array
;
5220 flexible_array
= NULL
;
5221 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5224 while (field
&& field
->next
)
5225 field
= field
->next
;
5226 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5227 flexible_array
= field
;
5230 size
= type_size(type
, &align
);
5231 /* If unknown size, we must evaluate it before
5232 evaluating initializers because
5233 initializers can generate global data too
5234 (e.g. string pointers or ISOC99 compound
5235 literals). It also simplifies local
5236 initializers handling */
5237 tok_str_new(&init_str
);
5238 if (size
< 0 || (flexible_array
&& has_init
)) {
5240 tcc_error("unknown type size");
5241 /* get all init string */
5242 if (has_init
== 2) {
5243 /* only get strings */
5244 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5245 tok_str_add_tok(&init_str
);
5250 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5252 tcc_error("unexpected end of file in initializer");
5253 tok_str_add_tok(&init_str
);
5256 else if (tok
== '}') {
5266 tok_str_add(&init_str
, -1);
5267 tok_str_add(&init_str
, 0);
5270 save_parse_state(&saved_parse_state
);
5272 macro_ptr
= init_str
.str
;
5274 decl_initializer(type
, NULL
, 0, 1, 1);
5275 /* prepare second initializer parsing */
5276 macro_ptr
= init_str
.str
;
5279 /* if still unknown size, error */
5280 size
= type_size(type
, &align
);
5282 tcc_error("unknown type size");
5285 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5286 /* take into account specified alignment if bigger */
5288 if (ad
->aligned
> align
)
5289 align
= ad
->aligned
;
5290 } else if (ad
->packed
) {
5293 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5295 #ifdef CONFIG_TCC_BCHECK
5296 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5300 loc
= (loc
- size
) & -align
;
5302 #ifdef CONFIG_TCC_BCHECK
5303 /* handles bounds */
5304 /* XXX: currently, since we do only one pass, we cannot track
5305 '&' operators, so we add only arrays */
5306 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5307 unsigned long *bounds_ptr
;
5308 /* add padding between regions */
5310 /* then add local bound info */
5311 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5312 bounds_ptr
[0] = addr
;
5313 bounds_ptr
[1] = size
;
5317 /* local variable */
5318 sym_push(v
, type
, r
, addr
);
5320 /* push local reference */
5321 vset(type
, r
, addr
);
5327 if (v
&& scope
== VT_CONST
) {
5328 /* see if the symbol was already defined */
5331 if (!is_compatible_types(&sym
->type
, type
))
5332 tcc_error("incompatible types for redefinition of '%s'",
5333 get_tok_str(v
, NULL
));
5334 if (sym
->type
.t
& VT_EXTERN
) {
5335 /* if the variable is extern, it was not allocated */
5336 sym
->type
.t
&= ~VT_EXTERN
;
5337 /* set array size if it was ommited in extern
5339 if ((sym
->type
.t
& VT_ARRAY
) &&
5340 sym
->type
.ref
->c
< 0 &&
5342 sym
->type
.ref
->c
= type
->ref
->c
;
5344 /* we accept several definitions of the same
5345 global variable. this is tricky, because we
5346 must play with the SHN_COMMON type of the symbol */
5347 /* XXX: should check if the variable was already
5348 initialized. It is incorrect to initialized it
5350 /* no init data, we won't add more to the symbol */
5357 /* allocate symbol in corresponding section */
5362 else if (tcc_state
->nocommon
)
5366 data_offset
= sec
->data_offset
;
5367 data_offset
= (data_offset
+ align
- 1) & -align
;
5369 /* very important to increment global pointer at this time
5370 because initializers themselves can create new initializers */
5371 data_offset
+= size
;
5372 #ifdef CONFIG_TCC_BCHECK
5373 /* add padding if bound check */
5374 if (tcc_state
->do_bounds_check
)
5377 sec
->data_offset
= data_offset
;
5378 /* allocate section space to put the data */
5379 if (sec
->sh_type
!= SHT_NOBITS
&&
5380 data_offset
> sec
->data_allocated
)
5381 section_realloc(sec
, data_offset
);
5382 /* align section if needed */
5383 if (align
> sec
->sh_addralign
)
5384 sec
->sh_addralign
= align
;
5386 addr
= 0; /* avoid warning */
5390 if (scope
!= VT_CONST
|| !sym
) {
5391 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5392 sym
->asm_label
= asm_label
;
5394 /* update symbol definition */
5396 put_extern_sym(sym
, sec
, addr
, size
);
5399 /* put a common area */
5400 put_extern_sym(sym
, NULL
, align
, size
);
5401 /* XXX: find a nicer way */
5402 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5403 esym
->st_shndx
= SHN_COMMON
;
5408 /* push global reference */
5409 sym
= get_sym_ref(type
, sec
, addr
, size
);
5411 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5414 /* patch symbol weakness */
5415 if (type
->t
& VT_WEAK
)
5417 #ifdef CONFIG_TCC_BCHECK
5418 /* handles bounds now because the symbol must be defined
5419 before for the relocation */
5420 if (tcc_state
->do_bounds_check
) {
5421 unsigned long *bounds_ptr
;
5423 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5424 /* then add global bound info */
5425 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5426 bounds_ptr
[0] = 0; /* relocated */
5427 bounds_ptr
[1] = size
;
5431 if (has_init
|| (type
->t
& VT_VLA
)) {
5432 decl_initializer(type
, sec
, addr
, 1, 0);
5433 /* restore parse state if needed */
5435 tok_str_free(init_str
.str
);
5436 restore_parse_state(&saved_parse_state
);
5438 /* patch flexible array member size back to -1, */
5439 /* for possible subsequent similar declarations */
5441 flexible_array
->type
.ref
->c
= -1;
5446 static void put_func_debug(Sym
*sym
)
5451 /* XXX: we put here a dummy type */
5452 snprintf(buf
, sizeof(buf
), "%s:%c1",
5453 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5454 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5455 cur_text_section
, sym
->c
);
5456 /* //gr gdb wants a line at the function */
5457 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5462 /* parse an old style function declaration list */
5463 /* XXX: check multiple parameter */
5464 static void func_decl_list(Sym
*func_sym
)
5471 /* parse each declaration */
5472 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5473 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5474 if (!parse_btype(&btype
, &ad
))
5475 expect("declaration list");
5476 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5477 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5479 /* we accept no variable after */
5483 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5484 /* find parameter in function parameter list */
5487 if ((s
->v
& ~SYM_FIELD
) == v
)
5491 tcc_error("declaration for parameter '%s' but no such parameter",
5492 get_tok_str(v
, NULL
));
5494 /* check that no storage specifier except 'register' was given */
5495 if (type
.t
& VT_STORAGE
)
5496 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5497 convert_parameter_type(&type
);
5498 /* we can add the type (NOTE: it could be local to the function) */
5500 /* accept other parameters */
5511 /* parse a function defined by symbol 'sym' and generate its code in
5512 'cur_text_section' */
5513 static void gen_function(Sym
*sym
)
5515 int saved_nocode_wanted
= nocode_wanted
;
5517 ind
= cur_text_section
->data_offset
;
5518 /* NOTE: we patch the symbol size later */
5519 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5520 funcname
= get_tok_str(sym
->v
, NULL
);
5522 /* put debug symbol */
5523 if (tcc_state
->do_debug
)
5524 put_func_debug(sym
);
5525 /* push a dummy symbol to enable local sym storage */
5526 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5527 gfunc_prolog(&sym
->type
);
5529 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5532 cur_text_section
->data_offset
= ind
;
5533 label_pop(&global_label_stack
, NULL
);
5534 /* reset local stack */
5535 scope_stack_bottom
= NULL
;
5536 sym_pop(&local_stack
, NULL
);
5537 /* end of function */
5538 /* patch symbol size */
5539 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5541 /* patch symbol weakness (this definition overrules any prototype) */
5542 if (sym
->type
.t
& VT_WEAK
)
5544 if (tcc_state
->do_debug
) {
5545 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5547 /* It's better to crash than to generate wrong code */
5548 cur_text_section
= NULL
;
5549 funcname
= ""; /* for safety */
5550 func_vt
.t
= VT_VOID
; /* for safety */
5551 ind
= 0; /* for safety */
5552 nocode_wanted
= saved_nocode_wanted
;
5555 ST_FUNC
void gen_inline_functions(void)
5558 int *str
, inline_generated
, i
;
5559 struct InlineFunc
*fn
;
5561 /* iterate while inline function are referenced */
5563 inline_generated
= 0;
5564 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5565 fn
= tcc_state
->inline_fns
[i
];
5567 if (sym
&& sym
->c
) {
5568 /* the function was used: generate its code and
5569 convert it to a normal function */
5570 str
= fn
->token_str
;
5573 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
5574 sym
->r
= VT_SYM
| VT_CONST
;
5575 sym
->type
.t
&= ~VT_INLINE
;
5579 cur_text_section
= text_section
;
5581 macro_ptr
= NULL
; /* fail safe */
5583 inline_generated
= 1;
5586 if (!inline_generated
)
5589 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5590 fn
= tcc_state
->inline_fns
[i
];
5591 str
= fn
->token_str
;
5594 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5597 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5598 static int decl0(int l
, int is_for_loop_init
)
5606 if (!parse_btype(&btype
, &ad
)) {
5607 if (is_for_loop_init
)
5609 /* skip redundant ';' */
5610 /* XXX: find more elegant solution */
5615 if (l
== VT_CONST
&&
5616 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5617 /* global asm block */
5621 /* special test for old K&R protos without explicit int
5622 type. Only accepted when defining global data */
5623 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5627 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5628 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5630 /* we accept no variable after */
5634 while (1) { /* iterate thru each declaration */
5635 char *asm_label
; // associated asm label
5637 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5641 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5642 printf("type = '%s'\n", buf
);
5645 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5646 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5647 tcc_error("function without file scope cannot be static");
5649 /* if old style function prototype, we accept a
5652 if (sym
->c
== FUNC_OLD
)
5653 func_decl_list(sym
);
5657 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5660 asm_label_instr(&astr
);
5661 asm_label
= tcc_strdup(astr
.data
);
5664 /* parse one last attribute list, after asm label */
5665 parse_attribute(&ad
);
5670 #ifdef TCC_TARGET_PE
5672 type
.t
|= VT_IMPORT
;
5674 type
.t
|= VT_EXPORT
;
5678 tcc_error("cannot use local functions");
5679 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5680 expect("function definition");
5682 /* reject abstract declarators in function definition */
5684 while ((sym
= sym
->next
) != NULL
)
5685 if (!(sym
->v
& ~SYM_FIELD
))
5686 expect("identifier");
5688 /* XXX: cannot do better now: convert extern line to static inline */
5689 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5690 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5694 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5697 r
= sym
->type
.ref
->r
;
5698 /* use func_call from prototype if not defined */
5699 if (FUNC_CALL(r
) != FUNC_CDECL
5700 && FUNC_CALL(type
.ref
->r
) == FUNC_CDECL
)
5701 FUNC_CALL(type
.ref
->r
) = FUNC_CALL(r
);
5703 /* use export from prototype */
5705 FUNC_EXPORT(type
.ref
->r
) = 1;
5707 /* use static from prototype */
5708 if (sym
->type
.t
& VT_STATIC
)
5709 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5711 if (!is_compatible_types(&sym
->type
, &type
)) {
5713 tcc_error("incompatible types for redefinition of '%s'",
5714 get_tok_str(v
, NULL
));
5716 /* if symbol is already defined, then put complete type */
5719 /* put function symbol */
5720 sym
= global_identifier_push(v
, type
.t
, 0);
5721 sym
->type
.ref
= type
.ref
;
5724 /* static inline functions are just recorded as a kind
5725 of macro. Their code will be emitted at the end of
5726 the compilation unit only if they are used */
5727 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5728 (VT_INLINE
| VT_STATIC
)) {
5729 TokenString func_str
;
5731 struct InlineFunc
*fn
;
5732 const char *filename
;
5734 tok_str_new(&func_str
);
5740 tcc_error("unexpected end of file");
5741 tok_str_add_tok(&func_str
);
5746 } else if (t
== '}') {
5748 if (block_level
== 0)
5752 tok_str_add(&func_str
, -1);
5753 tok_str_add(&func_str
, 0);
5754 filename
= file
? file
->filename
: "";
5755 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5756 strcpy(fn
->filename
, filename
);
5758 fn
->token_str
= func_str
.str
;
5759 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5762 /* compute text section */
5763 cur_text_section
= ad
.section
;
5764 if (!cur_text_section
)
5765 cur_text_section
= text_section
;
5766 sym
->r
= VT_SYM
| VT_CONST
;
5771 if (btype
.t
& VT_TYPEDEF
) {
5772 /* save typedefed type */
5773 /* XXX: test storage specifiers ? */
5774 sym
= sym_push(v
, &type
, INT_ATTR(&ad
), 0);
5775 sym
->type
.t
|= VT_TYPEDEF
;
5778 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5779 /* external function definition */
5780 /* specific case for func_call attribute */
5781 type
.ref
->r
= INT_ATTR(&ad
);
5782 } else if (!(type
.t
& VT_ARRAY
)) {
5783 /* not lvalue if array */
5784 r
|= lvalue_type(type
.t
);
5786 has_init
= (tok
== '=');
5787 if (has_init
&& (type
.t
& VT_VLA
))
5788 tcc_error("Variable length array cannot be initialized");
5789 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
5790 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
5791 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
5792 /* external variable or function */
5793 /* NOTE: as GCC, uninitialized global static
5794 arrays of null size are considered as
5796 sym
= external_sym(v
, &type
, r
, asm_label
);
5798 if (type
.t
& VT_WEAK
)
5801 if (ad
.alias_target
) {
5806 alias_target
= sym_find(ad
.alias_target
);
5807 if (!alias_target
|| !alias_target
->c
)
5808 tcc_error("unsupported forward __alias__ attribute");
5809 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
5810 tsec
.sh_num
= esym
->st_shndx
;
5811 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
5814 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
5815 if (type
.t
& VT_STATIC
)
5821 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
5825 if (is_for_loop_init
)
5838 ST_FUNC
void decl(int l
)