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 long long constant */
348 static void vpushll(long long v
)
355 vsetc(&ctype
, VT_CONST
, &cval
);
358 /* push arbitrary 64bit constant */
359 void vpush64(int ty
, unsigned long long v
)
365 vsetc(&ctype
, VT_CONST
, &cval
);
368 /* Return a static symbol pointing to a section */
369 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
375 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
376 sym
->type
.ref
= type
->ref
;
377 sym
->r
= VT_CONST
| VT_SYM
;
378 put_extern_sym(sym
, sec
, offset
, size
);
382 /* push a reference to a section offset by adding a dummy symbol */
383 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
388 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
389 vtop
->sym
= get_sym_ref(type
, sec
, offset
, size
);
392 /* define a new external reference to a symbol 'v' of type 'u' */
393 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
399 /* push forward reference */
400 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
401 s
->type
.ref
= type
->ref
;
402 s
->r
= r
| VT_CONST
| VT_SYM
;
407 /* define a new external reference to a symbol 'v' with alternate asm
408 name 'asm_label' of type 'u'. 'asm_label' is equal to NULL if there
409 is no alternate name (most cases) */
410 static Sym
*external_sym(int v
, CType
*type
, int r
, char *asm_label
)
416 /* push forward reference */
417 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
418 s
->asm_label
= asm_label
;
419 s
->type
.t
|= VT_EXTERN
;
420 } else if (s
->type
.ref
== func_old_type
.ref
) {
421 s
->type
.ref
= type
->ref
;
422 s
->r
= r
| VT_CONST
| VT_SYM
;
423 s
->type
.t
|= VT_EXTERN
;
424 } else if (!is_compatible_types(&s
->type
, type
)) {
425 tcc_error("incompatible types for redefinition of '%s'",
426 get_tok_str(v
, NULL
));
431 /* push a reference to global symbol v */
432 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
437 sym
= external_global_sym(v
, type
, 0);
439 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
443 ST_FUNC
void vset(CType
*type
, int r
, int v
)
448 vsetc(type
, r
, &cval
);
451 static void vseti(int r
, int v
)
459 ST_FUNC
void vswap(void)
461 unsigned long *vtopl
;
462 /* cannot let cpu flags if other instruction are generated. Also
463 avoid leaving VT_JMP anywhere except on the top of the stack
464 because it would complicate the code generator. */
465 if (vtop
>= vstack
) {
466 int v
= vtop
->r
& VT_VALMASK
;
467 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
472 * vtop[0], vtop[-1] = vtop[-1], vtop[0]
474 * vswap is called often and exchanging vtop[0] vs vtop[-1] is hot on
475 * profile, so it is hand optimized
477 vtopl
= (unsigned long *) vtop
;
478 # define VSIZEL (sizeof(*vtop) / sizeof(*vtopl))
480 _STATIC_ASSERT( VSIZEL
*sizeof(*vtopl
) == sizeof(*vtop
) );
481 _STATIC_ASSERT( VSIZEL
<= 16 ); /* should be enough */
485 unsigned long tmpl; \
487 vtopl[i] = vtopl[-1*VSIZEL + i]; \
488 vtopl[-1*VSIZEL + i] = tmpl; \
491 VSWAPL(15); VSWAPL(14); VSWAPL(13); VSWAPL(12);
492 VSWAPL(11); VSWAPL(10); VSWAPL( 9); VSWAPL( 8);
493 VSWAPL( 7); VSWAPL( 6); VSWAPL( 5); VSWAPL( 4);
494 VSWAPL( 3); VSWAPL( 2); VSWAPL( 1); VSWAPL( 0);
501 ST_FUNC
void vpushv(SValue
*v
)
503 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
504 tcc_error("memory full");
509 static void vdup(void)
514 /* save r to the memory stack, and mark it as being free */
515 ST_FUNC
void save_reg(int r
)
517 int l
, saved
, size
, align
;
521 /* modify all stack values */
524 for(p
=vstack
;p
<=vtop
;p
++) {
525 if ((p
->r
& VT_VALMASK
) == r
||
526 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
527 /* must save value on stack if not already done */
529 /* NOTE: must reload 'r' because r might be equal to r2 */
530 r
= p
->r
& VT_VALMASK
;
531 /* store register in the stack */
533 if ((p
->r
& VT_LVAL
) ||
534 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
535 #ifdef TCC_TARGET_X86_64
536 type
= &char_pointer_type
;
540 size
= type_size(type
, &align
);
541 loc
= (loc
- size
) & -align
;
543 sv
.r
= VT_LOCAL
| VT_LVAL
;
546 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
547 /* x86 specific: need to pop fp register ST0 if saved */
549 o(0xd8dd); /* fstp %st(0) */
552 #ifndef TCC_TARGET_X86_64
553 /* special long long case */
554 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
562 /* mark that stack entry as being saved on the stack */
563 if (p
->r
& VT_LVAL
) {
564 /* also clear the bounded flag because the
565 relocation address of the function was stored in
567 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
569 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
577 #ifdef TCC_TARGET_ARM
578 /* find a register of class 'rc2' with at most one reference on stack.
579 * If none, call get_reg(rc) */
580 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
585 for(r
=0;r
<NB_REGS
;r
++) {
586 if (reg_classes
[r
] & rc2
) {
589 for(p
= vstack
; p
<= vtop
; p
++) {
590 if ((p
->r
& VT_VALMASK
) == r
||
591 (p
->r2
& VT_VALMASK
) == r
)
602 /* find a free register of class 'rc'. If none, save one register */
603 ST_FUNC
int get_reg(int rc
)
608 /* find a free register */
609 for(r
=0;r
<NB_REGS
;r
++) {
610 if (reg_classes
[r
] & rc
) {
611 for(p
=vstack
;p
<=vtop
;p
++) {
612 if ((p
->r
& VT_VALMASK
) == r
||
613 (p
->r2
& VT_VALMASK
) == r
)
621 /* no register left : free the first one on the stack (VERY
622 IMPORTANT to start from the bottom to ensure that we don't
623 spill registers used in gen_opi()) */
624 for(p
=vstack
;p
<=vtop
;p
++) {
625 /* look at second register (if long long) */
626 r
= p
->r2
& VT_VALMASK
;
627 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
629 r
= p
->r
& VT_VALMASK
;
630 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
636 /* Should never comes here */
640 /* save registers up to (vtop - n) stack entry */
641 ST_FUNC
void save_regs(int n
)
646 for(p
= vstack
;p
<= p1
; p
++) {
647 r
= p
->r
& VT_VALMASK
;
654 /* move register 's' to 'r', and flush previous value of r to memory
656 static void move_reg(int r
, int s
)
669 /* get address of vtop (vtop MUST BE an lvalue) */
670 static void gaddrof(void)
672 if (vtop
->r
& VT_REF
)
675 /* tricky: if saved lvalue, then we can go back to lvalue */
676 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
677 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
682 #ifdef CONFIG_TCC_BCHECK
683 /* generate lvalue bound code */
684 static void gbound(void)
689 vtop
->r
&= ~VT_MUSTBOUND
;
690 /* if lvalue, then use checking code before dereferencing */
691 if (vtop
->r
& VT_LVAL
) {
692 /* if not VT_BOUNDED value, then make one */
693 if (!(vtop
->r
& VT_BOUNDED
)) {
694 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
695 /* must save type because we must set it to int to get pointer */
697 vtop
->type
.t
= VT_INT
;
700 gen_bounded_ptr_add();
701 vtop
->r
|= lval_type
;
704 /* then check for dereferencing */
705 gen_bounded_ptr_deref();
710 /* store vtop a register belonging to class 'rc'. lvalues are
711 converted to values. Cannot be used if cannot be converted to
712 register value (such as structures). */
713 ST_FUNC
int gv(int rc
)
715 int r
, bit_pos
, bit_size
, size
, align
, i
;
716 #ifndef TCC_TARGET_X86_64
720 /* NOTE: get_reg can modify vstack[] */
721 if (vtop
->type
.t
& VT_BITFIELD
) {
724 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
725 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
726 /* remove bit field info to avoid loops */
727 vtop
->type
.t
&= ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
728 /* cast to int to propagate signedness in following ops */
729 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
734 if((vtop
->type
.t
& VT_UNSIGNED
) ||
735 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
736 type
.t
|= VT_UNSIGNED
;
738 /* generate shifts */
739 vpushi(bits
- (bit_pos
+ bit_size
));
741 vpushi(bits
- bit_size
);
742 /* NOTE: transformed to SHR if unsigned */
746 if (is_float(vtop
->type
.t
) &&
747 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
750 unsigned long offset
;
751 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
755 /* XXX: unify with initializers handling ? */
756 /* CPUs usually cannot use float constants, so we store them
757 generically in data segment */
758 size
= type_size(&vtop
->type
, &align
);
759 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
760 data_section
->data_offset
= offset
;
761 /* XXX: not portable yet */
762 #if defined(__i386__) || defined(__x86_64__)
763 /* Zero pad x87 tenbyte long doubles */
764 if (size
== LDOUBLE_SIZE
) {
765 vtop
->c
.tab
[2] &= 0xffff;
766 #if LDOUBLE_SIZE == 16
771 ptr
= section_ptr_add(data_section
, size
);
773 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
777 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
781 ptr
[i
] = vtop
->c
.tab
[i
];
782 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
783 vtop
->r
|= VT_LVAL
| VT_SYM
;
787 #ifdef CONFIG_TCC_BCHECK
788 if (vtop
->r
& VT_MUSTBOUND
)
792 r
= vtop
->r
& VT_VALMASK
;
793 #ifndef TCC_TARGET_X86_64
798 /* need to reload if:
800 - lvalue (need to dereference pointer)
801 - already a register, but not in the right class */
803 || (vtop
->r
& VT_LVAL
)
804 || !(reg_classes
[r
] & rc
)
805 #ifndef TCC_TARGET_X86_64
806 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
811 #ifndef TCC_TARGET_X86_64
812 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
814 unsigned long long ll
;
815 /* two register type load : expand to two words
817 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
820 vtop
->c
.ui
= ll
; /* first word */
822 vtop
->r
= r
; /* save register value */
823 vpushi(ll
>> 32); /* second word */
824 } else if (r
>= VT_CONST
|| /* XXX: test to VT_CONST incorrect ? */
825 (vtop
->r
& VT_LVAL
)) {
826 /* We do not want to modifier the long long
827 pointer here, so the safest (and less
828 efficient) is to save all the other registers
829 in the stack. XXX: totally inefficient. */
831 /* load from memory */
834 vtop
[-1].r
= r
; /* save register value */
835 /* increment pointer to get second word */
836 vtop
->type
.t
= VT_INT
;
845 vtop
[-1].r
= r
; /* save register value */
846 vtop
->r
= vtop
[-1].r2
;
848 /* Allocate second register. Here we rely on the fact that
849 get_reg() tries first to free r2 of an SValue. */
853 /* write second register */
857 if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
859 /* lvalue of scalar type : need to use lvalue type
860 because of possible cast */
863 /* compute memory access type */
864 if (vtop
->r
& VT_LVAL_BYTE
)
866 else if (vtop
->r
& VT_LVAL_SHORT
)
868 if (vtop
->r
& VT_LVAL_UNSIGNED
)
872 /* restore wanted type */
875 /* one register type load */
880 #ifdef TCC_TARGET_C67
881 /* uses register pairs for doubles */
882 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
889 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
890 ST_FUNC
void gv2(int rc1
, int rc2
)
894 /* generate more generic register first. But VT_JMP or VT_CMP
895 values must be generated first in all cases to avoid possible
897 v
= vtop
[0].r
& VT_VALMASK
;
898 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
903 /* test if reload is needed for first register */
904 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
914 /* test if reload is needed for first register */
915 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
921 /* wrapper around RC_FRET to return a register by type */
922 static int rc_fret(int t
)
924 #ifdef TCC_TARGET_X86_64
925 if (t
== VT_LDOUBLE
) {
932 /* wrapper around REG_FRET to return a register by type */
933 static int reg_fret(int t
)
935 #ifdef TCC_TARGET_X86_64
936 if (t
== VT_LDOUBLE
) {
943 /* expand long long on stack in two int registers */
944 static void lexpand(void)
948 u
= vtop
->type
.t
& VT_UNSIGNED
;
951 vtop
[0].r
= vtop
[-1].r2
;
952 vtop
[0].r2
= VT_CONST
;
953 vtop
[-1].r2
= VT_CONST
;
954 vtop
[0].type
.t
= VT_INT
| u
;
955 vtop
[-1].type
.t
= VT_INT
| u
;
958 #ifdef TCC_TARGET_ARM
959 /* expand long long on stack */
960 ST_FUNC
void lexpand_nr(void)
964 u
= vtop
->type
.t
& VT_UNSIGNED
;
967 vtop
->type
.t
= VT_INT
| u
;
968 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
970 vtop
[-1].c
.ui
= vtop
->c
.ull
;
971 vtop
->c
.ui
= vtop
->c
.ull
>> 32;
973 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
975 vtop
->r
= vtop
[-1].r
;
976 } else if (v
> VT_CONST
) {
980 vtop
->r
= vtop
[-1].r2
;
981 vtop
[-1].r2
= VT_CONST
;
982 vtop
[-1].type
.t
= VT_INT
| u
;
986 /* build a long long from two ints */
987 static void lbuild(int t
)
990 vtop
[-1].r2
= vtop
[0].r
;
995 /* rotate n first stack elements to the bottom
996 I1 ... In -> I2 ... In I1 [top is right]
998 ST_FUNC
void vrotb(int n
)
1004 for(i
=-n
+1;i
!=0;i
++)
1005 vtop
[i
] = vtop
[i
+1];
1009 /* rotate the n elements before entry e towards the top
1010 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1012 ST_FUNC
void vrote(SValue
*e
, int n
)
1018 for(i
= 0;i
< n
- 1; i
++)
1023 /* rotate n first stack elements to the top
1024 I1 ... In -> In I1 ... I(n-1) [top is right]
1026 ST_FUNC
void vrott(int n
)
1031 /* pop stack value */
1032 ST_FUNC
void vpop(void)
1035 v
= vtop
->r
& VT_VALMASK
;
1036 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1037 /* for x86, we need to pop the FP stack */
1038 if (v
== TREG_ST0
&& !nocode_wanted
) {
1039 o(0xd8dd); /* fstp %st(0) */
1042 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1043 /* need to put correct jump if && or || without test */
1049 /* convert stack entry to register and duplicate its value in another
1051 static void gv_dup(void)
1057 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1064 /* stack: H L L1 H1 */
1072 /* duplicate value */
1077 #ifdef TCC_TARGET_X86_64
1078 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1088 load(r1
, &sv
); /* move r to r1 */
1090 /* duplicates value */
1096 #ifndef TCC_TARGET_X86_64
1097 /* generate CPU independent (unsigned) long long operations */
1098 static void gen_opl(int op
)
1100 int t
, a
, b
, op1
, c
, i
;
1102 unsigned short reg_iret
= REG_IRET
;
1103 unsigned short reg_lret
= REG_LRET
;
1109 func
= TOK___divdi3
;
1112 func
= TOK___udivdi3
;
1115 func
= TOK___moddi3
;
1118 func
= TOK___umoddi3
;
1125 /* call generic long long function */
1126 vpush_global_sym(&func_old_type
, func
);
1131 vtop
->r2
= reg_lret
;
1144 /* stack: L1 H1 L2 H2 */
1149 vtop
[-2] = vtop
[-3];
1152 /* stack: H1 H2 L1 L2 */
1158 /* stack: H1 H2 L1 L2 ML MH */
1161 /* stack: ML MH H1 H2 L1 L2 */
1165 /* stack: ML MH H1 L2 H2 L1 */
1170 /* stack: ML MH M1 M2 */
1173 } else if (op
== '+' || op
== '-') {
1174 /* XXX: add non carry method too (for MIPS or alpha) */
1180 /* stack: H1 H2 (L1 op L2) */
1183 gen_op(op1
+ 1); /* TOK_xxxC2 */
1186 /* stack: H1 H2 (L1 op L2) */
1189 /* stack: (L1 op L2) H1 H2 */
1191 /* stack: (L1 op L2) (H1 op H2) */
1199 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1200 t
= vtop
[-1].type
.t
;
1204 /* stack: L H shift */
1206 /* constant: simpler */
1207 /* NOTE: all comments are for SHL. the other cases are
1208 done by swaping words */
1219 if (op
!= TOK_SAR
) {
1252 /* XXX: should provide a faster fallback on x86 ? */
1255 func
= TOK___ashrdi3
;
1258 func
= TOK___lshrdi3
;
1261 func
= TOK___ashldi3
;
1267 /* compare operations */
1273 /* stack: L1 H1 L2 H2 */
1275 vtop
[-1] = vtop
[-2];
1277 /* stack: L1 L2 H1 H2 */
1280 /* when values are equal, we need to compare low words. since
1281 the jump is inverted, we invert the test too. */
1284 else if (op1
== TOK_GT
)
1286 else if (op1
== TOK_ULT
)
1288 else if (op1
== TOK_UGT
)
1293 if (op1
!= TOK_NE
) {
1297 /* generate non equal test */
1298 /* XXX: NOT PORTABLE yet */
1302 #if defined(TCC_TARGET_I386)
1303 b
= psym(0x850f, 0);
1304 #elif defined(TCC_TARGET_ARM)
1306 o(0x1A000000 | encbranch(ind
, 0, 1));
1307 #elif defined(TCC_TARGET_C67)
1308 tcc_error("not implemented");
1310 #error not supported
1314 /* compare low. Always unsigned */
1318 else if (op1
== TOK_LE
)
1320 else if (op1
== TOK_GT
)
1322 else if (op1
== TOK_GE
)
1333 /* handle integer constant optimizations and various machine
1335 static void gen_opic(int op
)
1337 int c1
, c2
, t1
, t2
, n
;
1340 typedef unsigned long long U
;
1344 t1
= v1
->type
.t
& VT_BTYPE
;
1345 t2
= v2
->type
.t
& VT_BTYPE
;
1349 else if (v1
->type
.t
& VT_UNSIGNED
)
1356 else if (v2
->type
.t
& VT_UNSIGNED
)
1361 /* currently, we cannot do computations with forward symbols */
1362 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1363 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1366 case '+': l1
+= l2
; break;
1367 case '-': l1
-= l2
; break;
1368 case '&': l1
&= l2
; break;
1369 case '^': l1
^= l2
; break;
1370 case '|': l1
|= l2
; break;
1371 case '*': l1
*= l2
; break;
1378 /* if division by zero, generate explicit division */
1381 tcc_error("division by zero in constant");
1385 default: l1
/= l2
; break;
1386 case '%': l1
%= l2
; break;
1387 case TOK_UDIV
: l1
= (U
)l1
/ l2
; break;
1388 case TOK_UMOD
: l1
= (U
)l1
% l2
; break;
1391 case TOK_SHL
: l1
<<= l2
; break;
1392 case TOK_SHR
: l1
= (U
)l1
>> l2
; break;
1393 case TOK_SAR
: l1
>>= l2
; break;
1395 case TOK_ULT
: l1
= (U
)l1
< (U
)l2
; break;
1396 case TOK_UGE
: l1
= (U
)l1
>= (U
)l2
; break;
1397 case TOK_EQ
: l1
= l1
== l2
; break;
1398 case TOK_NE
: l1
= l1
!= l2
; break;
1399 case TOK_ULE
: l1
= (U
)l1
<= (U
)l2
; break;
1400 case TOK_UGT
: l1
= (U
)l1
> (U
)l2
; break;
1401 case TOK_LT
: l1
= l1
< l2
; break;
1402 case TOK_GE
: l1
= l1
>= l2
; break;
1403 case TOK_LE
: l1
= l1
<= l2
; break;
1404 case TOK_GT
: l1
= l1
> l2
; break;
1406 case TOK_LAND
: l1
= l1
&& l2
; break;
1407 case TOK_LOR
: l1
= l1
|| l2
; break;
1414 /* if commutative ops, put c2 as constant */
1415 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1416 op
== '|' || op
== '*')) {
1418 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1419 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1421 /* Filter out NOP operations like x*1, x-0, x&-1... */
1422 if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1425 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1426 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1432 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1433 /* try to use shifts instead of muls or divs */
1434 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1443 else if (op
== TOK_PDIV
)
1449 } else if (c2
&& (op
== '+' || op
== '-') &&
1450 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1451 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1452 /* symbol + constant case */
1459 if (!nocode_wanted
) {
1460 /* call low level op generator */
1461 if (t1
== VT_LLONG
|| t2
== VT_LLONG
)
1472 /* generate a floating point operation with constant propagation */
1473 static void gen_opif(int op
)
1481 /* currently, we cannot do computations with forward symbols */
1482 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1483 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1485 if (v1
->type
.t
== VT_FLOAT
) {
1488 } else if (v1
->type
.t
== VT_DOUBLE
) {
1496 /* NOTE: we only do constant propagation if finite number (not
1497 NaN or infinity) (ANSI spec) */
1498 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1502 case '+': f1
+= f2
; break;
1503 case '-': f1
-= f2
; break;
1504 case '*': f1
*= f2
; break;
1508 tcc_error("division by zero in constant");
1513 /* XXX: also handles tests ? */
1517 /* XXX: overflow test ? */
1518 if (v1
->type
.t
== VT_FLOAT
) {
1520 } else if (v1
->type
.t
== VT_DOUBLE
) {
1528 if (!nocode_wanted
) {
1536 static int pointed_size(CType
*type
)
1539 return type_size(pointed_type(type
), &align
);
1542 static void vla_runtime_pointed_size(CType
*type
)
1545 vla_runtime_type_size(pointed_type(type
), &align
);
1548 static inline int is_null_pointer(SValue
*p
)
1550 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1552 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& p
->c
.i
== 0) ||
1553 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.ll
== 0) ||
1554 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&& p
->c
.ptr
== 0);
1557 static inline int is_integer_btype(int bt
)
1559 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1560 bt
== VT_INT
|| bt
== VT_LLONG
);
1563 /* check types for comparison or substraction of pointers */
1564 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1566 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1569 /* null pointers are accepted for all comparisons as gcc */
1570 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1574 bt1
= type1
->t
& VT_BTYPE
;
1575 bt2
= type2
->t
& VT_BTYPE
;
1576 /* accept comparison between pointer and integer with a warning */
1577 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1578 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1579 tcc_warning("comparison between pointer and integer");
1583 /* both must be pointers or implicit function pointers */
1584 if (bt1
== VT_PTR
) {
1585 type1
= pointed_type(type1
);
1586 } else if (bt1
!= VT_FUNC
)
1587 goto invalid_operands
;
1589 if (bt2
== VT_PTR
) {
1590 type2
= pointed_type(type2
);
1591 } else if (bt2
!= VT_FUNC
) {
1593 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1595 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1596 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1600 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1601 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1602 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1603 /* gcc-like error if '-' is used */
1605 goto invalid_operands
;
1607 tcc_warning("comparison of distinct pointer types lacks a cast");
1611 /* generic gen_op: handles types problems */
1612 ST_FUNC
void gen_op(int op
)
1614 int u
, t1
, t2
, bt1
, bt2
, t
;
1617 t1
= vtop
[-1].type
.t
;
1618 t2
= vtop
[0].type
.t
;
1619 bt1
= t1
& VT_BTYPE
;
1620 bt2
= t2
& VT_BTYPE
;
1622 if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1623 /* at least one operand is a pointer */
1624 /* relationnal op: must be both pointers */
1625 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1626 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1627 /* pointers are handled are unsigned */
1628 #ifdef TCC_TARGET_X86_64
1629 t
= VT_LLONG
| VT_UNSIGNED
;
1631 t
= VT_INT
| VT_UNSIGNED
;
1635 /* if both pointers, then it must be the '-' op */
1636 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1638 tcc_error("cannot use pointers here");
1639 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1640 /* XXX: check that types are compatible */
1641 if (vtop
[-1].type
.t
& VT_VLA
) {
1642 vla_runtime_pointed_size(&vtop
[-1].type
);
1644 vpushi(pointed_size(&vtop
[-1].type
));
1648 /* set to integer type */
1649 #ifdef TCC_TARGET_X86_64
1650 vtop
->type
.t
= VT_LLONG
;
1652 vtop
->type
.t
= VT_INT
;
1657 /* exactly one pointer : must be '+' or '-'. */
1658 if (op
!= '-' && op
!= '+')
1659 tcc_error("cannot use pointers here");
1660 /* Put pointer as first operand */
1661 if (bt2
== VT_PTR
) {
1665 type1
= vtop
[-1].type
;
1666 type1
.t
&= ~VT_ARRAY
;
1667 if (vtop
[-1].type
.t
& VT_VLA
)
1668 vla_runtime_pointed_size(&vtop
[-1].type
);
1670 u
= pointed_size(&vtop
[-1].type
);
1672 tcc_error("unknown array element size");
1673 #ifdef TCC_TARGET_X86_64
1676 /* XXX: cast to int ? (long long case) */
1681 #ifdef CONFIG_TCC_BCHECK
1682 /* if evaluating constant expression, no code should be
1683 generated, so no bound check */
1684 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
1685 /* if bounded pointers, we generate a special code to
1692 gen_bounded_ptr_add();
1698 /* put again type if gen_opic() swaped operands */
1701 } else if (is_float(bt1
) || is_float(bt2
)) {
1702 /* compute bigger type and do implicit casts */
1703 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
1705 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
1710 /* floats can only be used for a few operations */
1711 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
1712 (op
< TOK_ULT
|| op
> TOK_GT
))
1713 tcc_error("invalid operands for binary operation");
1715 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
1716 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
1717 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
1720 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
1721 /* cast to biggest op */
1723 /* convert to unsigned if it does not fit in a long long */
1724 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
1725 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
1728 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1729 tcc_error("comparison of struct");
1731 /* integer operations */
1733 /* convert to unsigned if it does not fit in an integer */
1734 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
1735 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
1738 /* XXX: currently, some unsigned operations are explicit, so
1739 we modify them here */
1740 if (t
& VT_UNSIGNED
) {
1747 else if (op
== TOK_LT
)
1749 else if (op
== TOK_GT
)
1751 else if (op
== TOK_LE
)
1753 else if (op
== TOK_GE
)
1760 /* special case for shifts and long long: we keep the shift as
1762 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
1769 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1770 /* relationnal op: the result is an int */
1771 vtop
->type
.t
= VT_INT
;
1778 #ifndef TCC_TARGET_ARM
1779 /* generic itof for unsigned long long case */
1780 static void gen_cvt_itof1(int t
)
1782 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
1783 (VT_LLONG
| VT_UNSIGNED
)) {
1786 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
1787 #if LDOUBLE_SIZE != 8
1788 else if (t
== VT_LDOUBLE
)
1789 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
1792 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
1796 vtop
->r
= reg_fret(t
);
1803 /* generic ftoi for unsigned long long case */
1804 static void gen_cvt_ftoi1(int t
)
1808 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
1809 /* not handled natively */
1810 st
= vtop
->type
.t
& VT_BTYPE
;
1812 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
1813 #if LDOUBLE_SIZE != 8
1814 else if (st
== VT_LDOUBLE
)
1815 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
1818 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
1823 vtop
->r2
= REG_LRET
;
1829 /* force char or short cast */
1830 static void force_charshort_cast(int t
)
1834 /* XXX: add optimization if lvalue : just change type and offset */
1839 if (t
& VT_UNSIGNED
) {
1840 vpushi((1 << bits
) - 1);
1846 /* result must be signed or the SAR is converted to an SHL
1847 This was not the case when "t" was a signed short
1848 and the last value on the stack was an unsigned int */
1849 vtop
->type
.t
&= ~VT_UNSIGNED
;
1855 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
1856 static void gen_cast(CType
*type
)
1858 int sbt
, dbt
, sf
, df
, c
, p
;
1860 /* special delayed cast for char/short */
1861 /* XXX: in some cases (multiple cascaded casts), it may still
1863 if (vtop
->r
& VT_MUSTCAST
) {
1864 vtop
->r
&= ~VT_MUSTCAST
;
1865 force_charshort_cast(vtop
->type
.t
);
1868 /* bitfields first get cast to ints */
1869 if (vtop
->type
.t
& VT_BITFIELD
) {
1873 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
1874 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
1879 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1880 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
1882 /* constant case: we can do it now */
1883 /* XXX: in ISOC, cannot do it if error in convert */
1884 if (sbt
== VT_FLOAT
)
1885 vtop
->c
.ld
= vtop
->c
.f
;
1886 else if (sbt
== VT_DOUBLE
)
1887 vtop
->c
.ld
= vtop
->c
.d
;
1890 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
1891 if (sbt
& VT_UNSIGNED
)
1892 vtop
->c
.ld
= vtop
->c
.ull
;
1894 vtop
->c
.ld
= vtop
->c
.ll
;
1896 if (sbt
& VT_UNSIGNED
)
1897 vtop
->c
.ld
= vtop
->c
.ui
;
1899 vtop
->c
.ld
= vtop
->c
.i
;
1902 if (dbt
== VT_FLOAT
)
1903 vtop
->c
.f
= (float)vtop
->c
.ld
;
1904 else if (dbt
== VT_DOUBLE
)
1905 vtop
->c
.d
= (double)vtop
->c
.ld
;
1906 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
1907 vtop
->c
.ull
= (unsigned long long)vtop
->c
.ld
;
1908 } else if (sf
&& dbt
== VT_BOOL
) {
1909 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
1912 vtop
->c
.ll
= (long long)vtop
->c
.ld
;
1913 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
1914 vtop
->c
.ll
= vtop
->c
.ull
;
1915 else if (sbt
& VT_UNSIGNED
)
1916 vtop
->c
.ll
= vtop
->c
.ui
;
1917 #ifdef TCC_TARGET_X86_64
1918 else if (sbt
== VT_PTR
)
1921 else if (sbt
!= VT_LLONG
)
1922 vtop
->c
.ll
= vtop
->c
.i
;
1924 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
1925 vtop
->c
.ull
= vtop
->c
.ll
;
1926 else if (dbt
== VT_BOOL
)
1927 vtop
->c
.i
= (vtop
->c
.ll
!= 0);
1928 else if (dbt
!= VT_LLONG
) {
1930 if ((dbt
& VT_BTYPE
) == VT_BYTE
)
1932 else if ((dbt
& VT_BTYPE
) == VT_SHORT
)
1935 if(dbt
& VT_UNSIGNED
)
1936 vtop
->c
.ui
= ((unsigned int)vtop
->c
.ll
<< s
) >> s
;
1938 vtop
->c
.i
= ((int)vtop
->c
.ll
<< s
) >> s
;
1941 } else if (p
&& dbt
== VT_BOOL
) {
1944 } else if (!nocode_wanted
) {
1945 /* non constant case: generate code */
1947 /* convert from fp to fp */
1950 /* convert int to fp */
1953 /* convert fp to int */
1954 if (dbt
== VT_BOOL
) {
1958 /* we handle char/short/etc... with generic code */
1959 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
1960 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
1964 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
1965 /* additional cast for char/short... */
1970 #ifndef TCC_TARGET_X86_64
1971 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
1972 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
1973 /* scalar to long long */
1974 /* machine independent conversion */
1976 /* generate high word */
1977 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
1981 if (sbt
== VT_PTR
) {
1982 /* cast from pointer to int before we apply
1983 shift operation, which pointers don't support*/
1984 gen_cast(&int_type
);
1990 /* patch second register */
1991 vtop
[-1].r2
= vtop
->r
;
1995 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
1996 (dbt
& VT_BTYPE
) == VT_PTR
||
1997 (dbt
& VT_BTYPE
) == VT_FUNC
) {
1998 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
1999 (sbt
& VT_BTYPE
) != VT_PTR
&&
2000 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2001 /* need to convert from 32bit to 64bit */
2003 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2004 /* x86_64 specific: movslq */
2006 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2010 } else if (dbt
== VT_BOOL
) {
2011 /* scalar to bool */
2014 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2015 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2016 if (sbt
== VT_PTR
) {
2017 vtop
->type
.t
= VT_INT
;
2018 tcc_warning("nonportable conversion from pointer to char/short");
2020 force_charshort_cast(dbt
);
2021 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2023 if (sbt
== VT_LLONG
) {
2024 /* from long long: just take low order word */
2028 /* if lvalue and single word type, nothing to do because
2029 the lvalue already contains the real type size (see
2030 VT_LVAL_xxx constants) */
2033 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2034 /* if we are casting between pointer types,
2035 we must update the VT_LVAL_xxx size */
2036 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2037 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2042 /* return type size as known at compile time. Put alignment at 'a' */
2043 ST_FUNC
int type_size(CType
*type
, int *a
)
2048 bt
= type
->t
& VT_BTYPE
;
2049 if (bt
== VT_STRUCT
) {
2054 } else if (bt
== VT_PTR
) {
2055 if (type
->t
& VT_ARRAY
) {
2059 ts
= type_size(&s
->type
, a
);
2061 if (ts
< 0 && s
->c
< 0)
2069 } else if (bt
== VT_LDOUBLE
) {
2071 return LDOUBLE_SIZE
;
2072 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2073 #ifdef TCC_TARGET_I386
2074 #ifdef TCC_TARGET_PE
2079 #elif defined(TCC_TARGET_ARM)
2089 } else if (bt
== VT_INT
|| bt
== VT_ENUM
|| bt
== VT_FLOAT
) {
2092 } else if (bt
== VT_SHORT
) {
2096 /* char, void, function, _Bool */
2102 /* push type size as known at runtime time on top of value stack. Put
2104 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2106 if (type
->t
& VT_VLA
) {
2107 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2109 vpushi(type_size(type
, a
));
2113 /* return the pointed type of t */
2114 static inline CType
*pointed_type(CType
*type
)
2116 return &type
->ref
->type
;
2119 /* modify type so that its it is a pointer to type. */
2120 ST_FUNC
void mk_pointer(CType
*type
)
2123 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2124 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2128 /* compare function types. OLD functions match any new functions */
2129 static int is_compatible_func(CType
*type1
, CType
*type2
)
2135 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2137 /* check func_call */
2138 if (FUNC_CALL(s1
->r
) != FUNC_CALL(s2
->r
))
2140 /* XXX: not complete */
2141 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2145 while (s1
!= NULL
) {
2148 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2158 /* return true if type1 and type2 are the same. If unqualified is
2159 true, qualifiers on the types are ignored.
2161 - enums are not checked as gcc __builtin_types_compatible_p ()
2163 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2167 t1
= type1
->t
& VT_TYPE
;
2168 t2
= type2
->t
& VT_TYPE
;
2170 /* strip qualifiers before comparing */
2171 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2172 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2174 /* XXX: bitfields ? */
2177 /* test more complicated cases */
2178 bt1
= t1
& VT_BTYPE
;
2179 if (bt1
== VT_PTR
) {
2180 type1
= pointed_type(type1
);
2181 type2
= pointed_type(type2
);
2182 return is_compatible_types(type1
, type2
);
2183 } else if (bt1
== VT_STRUCT
) {
2184 return (type1
->ref
== type2
->ref
);
2185 } else if (bt1
== VT_FUNC
) {
2186 return is_compatible_func(type1
, type2
);
2192 /* return true if type1 and type2 are exactly the same (including
2195 static int is_compatible_types(CType
*type1
, CType
*type2
)
2197 return compare_types(type1
,type2
,0);
2200 /* return true if type1 and type2 are the same (ignoring qualifiers).
2202 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2204 return compare_types(type1
,type2
,1);
2207 /* print a type. If 'varstr' is not NULL, then the variable is also
2208 printed in the type */
2210 /* XXX: add array and function pointers */
2211 static void type_to_str(char *buf
, int buf_size
,
2212 CType
*type
, const char *varstr
)
2219 t
= type
->t
& VT_TYPE
;
2222 if (t
& VT_CONSTANT
)
2223 pstrcat(buf
, buf_size
, "const ");
2224 if (t
& VT_VOLATILE
)
2225 pstrcat(buf
, buf_size
, "volatile ");
2226 if (t
& VT_UNSIGNED
)
2227 pstrcat(buf
, buf_size
, "unsigned ");
2257 tstr
= "long double";
2259 pstrcat(buf
, buf_size
, tstr
);
2263 if (bt
== VT_STRUCT
)
2267 pstrcat(buf
, buf_size
, tstr
);
2268 v
= type
->ref
->v
& ~SYM_STRUCT
;
2269 if (v
>= SYM_FIRST_ANOM
)
2270 pstrcat(buf
, buf_size
, "<anonymous>");
2272 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2276 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2277 pstrcat(buf
, buf_size
, "(");
2279 while (sa
!= NULL
) {
2280 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2281 pstrcat(buf
, buf_size
, buf1
);
2284 pstrcat(buf
, buf_size
, ", ");
2286 pstrcat(buf
, buf_size
, ")");
2290 pstrcpy(buf1
, sizeof(buf1
), "*");
2292 pstrcat(buf1
, sizeof(buf1
), varstr
);
2293 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2297 pstrcat(buf
, buf_size
, " ");
2298 pstrcat(buf
, buf_size
, varstr
);
2303 /* verify type compatibility to store vtop in 'dt' type, and generate
2305 static void gen_assign_cast(CType
*dt
)
2307 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2308 char buf1
[256], buf2
[256];
2311 st
= &vtop
->type
; /* source type */
2312 dbt
= dt
->t
& VT_BTYPE
;
2313 sbt
= st
->t
& VT_BTYPE
;
2315 tcc_error("Cannot assign void value");
2316 if (dt
->t
& VT_CONSTANT
)
2317 tcc_warning("assignment of read-only location");
2320 /* special cases for pointers */
2321 /* '0' can also be a pointer */
2322 if (is_null_pointer(vtop
))
2324 /* accept implicit pointer to integer cast with warning */
2325 if (is_integer_btype(sbt
)) {
2326 tcc_warning("assignment makes pointer from integer without a cast");
2329 type1
= pointed_type(dt
);
2330 /* a function is implicitely a function pointer */
2331 if (sbt
== VT_FUNC
) {
2332 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2333 !is_compatible_types(pointed_type(dt
), st
))
2334 tcc_warning("assignment from incompatible pointer type");
2339 type2
= pointed_type(st
);
2340 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2341 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2342 /* void * can match anything */
2344 /* exact type match, except for unsigned */
2347 tmp_type1
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2348 tmp_type2
.t
&= ~(VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
2349 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2350 tcc_warning("assignment from incompatible pointer type");
2352 /* check const and volatile */
2353 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2354 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2355 tcc_warning("assignment discards qualifiers from pointer target type");
2361 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2362 tcc_warning("assignment makes integer from pointer without a cast");
2364 /* XXX: more tests */
2369 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2370 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2371 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2373 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2374 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2375 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2383 /* store vtop in lvalue pushed on stack */
2384 ST_FUNC
void vstore(void)
2386 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2388 ft
= vtop
[-1].type
.t
;
2389 sbt
= vtop
->type
.t
& VT_BTYPE
;
2390 dbt
= ft
& VT_BTYPE
;
2391 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2392 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2393 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2394 /* optimize char/short casts */
2395 delayed_cast
= VT_MUSTCAST
;
2396 vtop
->type
.t
= ft
& (VT_TYPE
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
)));
2397 /* XXX: factorize */
2398 if (ft
& VT_CONSTANT
)
2399 tcc_warning("assignment of read-only location");
2402 if (!(ft
& VT_BITFIELD
))
2403 gen_assign_cast(&vtop
[-1].type
);
2406 if (sbt
== VT_STRUCT
) {
2407 /* if structure, only generate pointer */
2408 /* structure assignment : generate memcpy */
2409 /* XXX: optimize if small size */
2410 if (!nocode_wanted
) {
2411 size
= type_size(&vtop
->type
, &align
);
2415 vtop
->type
.t
= VT_PTR
;
2418 /* address of memcpy() */
2421 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2422 else if(!(align
& 3))
2423 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2426 vpush_global_sym(&func_old_type
, TOK_memcpy
);
2431 vtop
->type
.t
= VT_PTR
;
2440 /* leave source on stack */
2441 } else if (ft
& VT_BITFIELD
) {
2442 /* bitfield store handling */
2443 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2444 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2445 /* remove bit field info to avoid loops */
2446 vtop
[-1].type
.t
= ft
& ~(VT_BITFIELD
| (-1 << VT_STRUCT_SHIFT
));
2448 /* duplicate source into other register */
2453 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2454 gen_cast(&vtop
[-1].type
);
2455 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2458 /* duplicate destination */
2460 vtop
[-1] = vtop
[-2];
2462 /* mask and shift source */
2463 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2464 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2465 vpushll((1ULL << bit_size
) - 1ULL);
2467 vpushi((1 << bit_size
) - 1);
2473 /* load destination, mask and or with source */
2475 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2476 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2478 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2485 /* pop off shifted source from "duplicate source..." above */
2489 #ifdef CONFIG_TCC_BCHECK
2490 /* bound check case */
2491 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2497 if (!nocode_wanted
) {
2501 #ifdef TCC_TARGET_X86_64
2502 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2507 r
= gv(rc
); /* generate value */
2508 /* if lvalue was saved on stack, must read it */
2509 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2511 t
= get_reg(RC_INT
);
2512 #ifdef TCC_TARGET_X86_64
2517 sv
.r
= VT_LOCAL
| VT_LVAL
;
2518 sv
.c
.ul
= vtop
[-1].c
.ul
;
2520 vtop
[-1].r
= t
| VT_LVAL
;
2523 #ifndef TCC_TARGET_X86_64
2524 /* two word case handling : store second register at word + 4 */
2525 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2527 /* convert to int to increment easily */
2528 vtop
->type
.t
= VT_INT
;
2534 /* XXX: it works because r2 is spilled last ! */
2535 store(vtop
->r2
, vtop
- 1);
2540 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2541 vtop
->r
|= delayed_cast
;
2545 /* post defines POST/PRE add. c is the token ++ or -- */
2546 ST_FUNC
void inc(int post
, int c
)
2549 vdup(); /* save lvalue */
2551 gv_dup(); /* duplicate value */
2556 vpushi(c
- TOK_MID
);
2558 vstore(); /* store value */
2560 vpop(); /* if post op, return saved value */
2563 /* Parse GNUC __attribute__ extension. Currently, the following
2564 extensions are recognized:
2565 - aligned(n) : set data/function alignment.
2566 - packed : force data alignment to 1
2567 - section(x) : generate data/code in this section.
2568 - unused : currently ignored, but may be used someday.
2569 - regparm(n) : pass function parameters in registers (i386 only)
2571 static void parse_attribute(AttributeDef
*ad
)
2575 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2579 while (tok
!= ')') {
2580 if (tok
< TOK_IDENT
)
2581 expect("attribute name");
2589 expect("section name");
2590 ad
->section
= find_section(tcc_state
, (char *)tokc
.cstr
->data
);
2598 expect("alias(\"target\")");
2599 ad
->alias_target
= /* save string as token, for later */
2600 tok_alloc((char*)tokc
.cstr
->data
, tokc
.cstr
->size
-1)->tok
;
2609 if (n
<= 0 || (n
& (n
- 1)) != 0)
2610 tcc_error("alignment must be a positive power of two");
2627 /* currently, no need to handle it because tcc does not
2628 track unused objects */
2632 /* currently, no need to handle it because tcc does not
2633 track unused objects */
2638 ad
->func_call
= FUNC_CDECL
;
2643 ad
->func_call
= FUNC_STDCALL
;
2645 #ifdef TCC_TARGET_I386
2655 ad
->func_call
= FUNC_FASTCALL1
+ n
- 1;
2661 ad
->func_call
= FUNC_FASTCALLW
;
2668 ad
->mode
= VT_LLONG
+ 1;
2671 ad
->mode
= VT_SHORT
+ 1;
2674 ad
->mode
= VT_INT
+ 1;
2677 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
2684 ad
->func_export
= 1;
2687 ad
->func_import
= 1;
2690 if (tcc_state
->warn_unsupported
)
2691 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
2692 /* skip parameters */
2694 int parenthesis
= 0;
2698 else if (tok
== ')')
2701 } while (parenthesis
&& tok
!= -1);
2714 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
2715 static void struct_decl(CType
*type
, int u
)
2717 int a
, v
, size
, align
, maxalign
, c
, offset
;
2718 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
2719 Sym
*s
, *ss
, *ass
, **ps
;
2723 a
= tok
; /* save decl type */
2728 /* struct already defined ? return it */
2730 expect("struct/union/enum name");
2734 tcc_error("invalid type");
2741 /* we put an undefined size for struct/union */
2742 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
2743 s
->r
= 0; /* default alignment is zero as gcc */
2744 /* put struct/union/enum name in type */
2752 tcc_error("struct/union/enum already defined");
2753 /* cannot be empty */
2755 /* non empty enums are not allowed */
2756 if (a
== TOK_ENUM
) {
2760 expect("identifier");
2766 /* enum symbols have static storage */
2767 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
2768 ss
->type
.t
|= VT_STATIC
;
2773 /* NOTE: we accept a trailing comma */
2784 while (tok
!= '}') {
2785 parse_btype(&btype
, &ad
);
2791 type_decl(&type1
, &ad
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
2792 if (v
== 0 && (type1
.t
& VT_BTYPE
) != VT_STRUCT
)
2793 expect("identifier");
2794 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
2795 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
2796 tcc_error("invalid type for '%s'",
2797 get_tok_str(v
, NULL
));
2801 bit_size
= expr_const();
2802 /* XXX: handle v = 0 case for messages */
2804 tcc_error("negative width in bit-field '%s'",
2805 get_tok_str(v
, NULL
));
2806 if (v
&& bit_size
== 0)
2807 tcc_error("zero width for bit-field '%s'",
2808 get_tok_str(v
, NULL
));
2810 size
= type_size(&type1
, &align
);
2812 if (align
< ad
.aligned
)
2814 } else if (ad
.packed
) {
2816 } else if (*tcc_state
->pack_stack_ptr
) {
2817 if (align
> *tcc_state
->pack_stack_ptr
)
2818 align
= *tcc_state
->pack_stack_ptr
;
2821 if (bit_size
>= 0) {
2822 bt
= type1
.t
& VT_BTYPE
;
2829 tcc_error("bitfields must have scalar type");
2831 if (bit_size
> bsize
) {
2832 tcc_error("width of '%s' exceeds its type",
2833 get_tok_str(v
, NULL
));
2834 } else if (bit_size
== bsize
) {
2835 /* no need for bit fields */
2837 } else if (bit_size
== 0) {
2838 /* XXX: what to do if only padding in a
2840 /* zero size: means to pad */
2843 /* we do not have enough room ?
2844 did the type change?
2846 if ((bit_pos
+ bit_size
) > bsize
||
2847 bt
!= prevbt
|| a
== TOK_UNION
)
2850 /* XXX: handle LSB first */
2851 type1
.t
|= VT_BITFIELD
|
2852 (bit_pos
<< VT_STRUCT_SHIFT
) |
2853 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
2854 bit_pos
+= bit_size
;
2860 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2861 /* add new memory data only if starting
2863 if (lbit_pos
== 0) {
2864 if (a
== TOK_STRUCT
) {
2865 c
= (c
+ align
- 1) & -align
;
2874 if (align
> maxalign
)
2878 printf("add field %s offset=%d",
2879 get_tok_str(v
, NULL
), offset
);
2880 if (type1
.t
& VT_BITFIELD
) {
2881 printf(" pos=%d size=%d",
2882 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
2883 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
2888 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
2890 while ((ass
= ass
->next
) != NULL
) {
2891 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
2896 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
2900 if (tok
== ';' || tok
== TOK_EOF
)
2907 /* store size and alignment */
2908 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
2914 /* return 0 if no type declaration. otherwise, return the basic type
2917 static int parse_btype(CType
*type
, AttributeDef
*ad
)
2919 int t
, u
, type_found
, typespec_found
, typedef_found
;
2923 memset(ad
, 0, sizeof(AttributeDef
));
2931 /* currently, we really ignore extension */
2941 if ((t
& VT_BTYPE
) != 0)
2942 tcc_error("too many basic types");
2958 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
2959 #ifndef TCC_TARGET_PE
2960 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2962 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
2963 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
2977 if ((t
& VT_BTYPE
) == VT_LONG
) {
2978 #ifdef TCC_TARGET_PE
2979 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
2981 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
2989 struct_decl(&type1
, VT_ENUM
);
2992 type
->ref
= type1
.ref
;
2996 struct_decl(&type1
, VT_STRUCT
);
2999 /* type modifiers */
3052 /* GNUC attribute */
3053 case TOK_ATTRIBUTE1
:
3054 case TOK_ATTRIBUTE2
:
3055 parse_attribute(ad
);
3058 t
= (t
& ~VT_BTYPE
) | u
;
3066 parse_expr_type(&type1
);
3067 /* remove all storage modifiers except typedef */
3068 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3071 if (typespec_found
|| typedef_found
)
3074 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3077 t
|= (s
->type
.t
& ~VT_TYPEDEF
);
3078 type
->ref
= s
->type
.ref
;
3080 /* get attributes from typedef */
3081 if (0 == ad
->aligned
)
3082 ad
->aligned
= FUNC_ALIGN(s
->r
);
3083 if (0 == ad
->func_call
)
3084 ad
->func_call
= FUNC_CALL(s
->r
);
3085 ad
->packed
|= FUNC_PACKED(s
->r
);
3094 if ((t
& (VT_SIGNED
|VT_UNSIGNED
)) == (VT_SIGNED
|VT_UNSIGNED
))
3095 tcc_error("signed and unsigned modifier");
3096 if (tcc_state
->char_is_unsigned
) {
3097 if ((t
& (VT_SIGNED
|VT_UNSIGNED
|VT_BTYPE
)) == VT_BYTE
)
3102 /* long is never used as type */
3103 if ((t
& VT_BTYPE
) == VT_LONG
)
3104 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
3105 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3107 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3113 /* convert a function parameter type (array to pointer and function to
3114 function pointer) */
3115 static inline void convert_parameter_type(CType
*pt
)
3117 /* remove const and volatile qualifiers (XXX: const could be used
3118 to indicate a const function parameter */
3119 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3120 /* array must be transformed to pointer according to ANSI C */
3122 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3127 ST_FUNC
void parse_asm_str(CString
*astr
)
3130 /* read the string */
3132 expect("string constant");
3134 while (tok
== TOK_STR
) {
3135 /* XXX: add \0 handling too ? */
3136 cstr_cat(astr
, tokc
.cstr
->data
);
3139 cstr_ccat(astr
, '\0');
3142 /* Parse an asm label and return the label
3143 * Don't forget to free the CString in the caller! */
3144 static void asm_label_instr(CString
*astr
)
3147 parse_asm_str(astr
);
3150 printf("asm_alias: \"%s\"\n", (char *)astr
->data
);
3154 static void post_type(CType
*type
, AttributeDef
*ad
)
3156 int n
, l
, t1
, arg_size
, align
;
3157 Sym
**plast
, *s
, *first
;
3162 /* function declaration */
3170 /* read param name and compute offset */
3171 if (l
!= FUNC_OLD
) {
3172 if (!parse_btype(&pt
, &ad1
)) {
3174 tcc_error("invalid type");
3181 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3183 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3184 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3185 tcc_error("parameter declared as void");
3186 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3191 expect("identifier");
3195 convert_parameter_type(&pt
);
3196 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3202 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3209 /* if no parameters, then old type prototype */
3213 /* NOTE: const is ignored in returned type as it has a special
3214 meaning in gcc / C++ */
3215 type
->t
&= ~VT_CONSTANT
;
3216 /* some ancient pre-K&R C allows a function to return an array
3217 and the array brackets to be put after the arguments, such
3218 that "int c()[]" means something like "int[] c()" */
3221 skip(']'); /* only handle simple "[]" */
3224 /* we push a anonymous symbol which will contain the function prototype */
3225 ad
->func_args
= arg_size
;
3226 s
= sym_push(SYM_FIELD
, type
, INT_ATTR(ad
), l
);
3230 } else if (tok
== '[') {
3231 /* array definition */
3233 if (tok
== TOK_RESTRICT1
)
3238 if (!local_stack
|| nocode_wanted
)
3239 vpushi(expr_const());
3241 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3244 tcc_error("invalid array size");
3246 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3247 tcc_error("size of variable length array should be an integer");
3252 /* parse next post type */
3253 post_type(type
, ad
);
3254 t1
|= type
->t
& VT_VLA
;
3257 loc
-= type_size(&int_type
, &align
);
3261 vla_runtime_type_size(type
, &align
);
3263 vset(&int_type
, VT_LOCAL
|VT_LVAL
, loc
);
3270 /* we push an anonymous symbol which will contain the array
3272 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3273 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3278 /* Parse a type declaration (except basic type), and return the type
3279 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3280 expected. 'type' should contain the basic type. 'ad' is the
3281 attribute definition of the basic type. It can be modified by
3284 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3287 CType type1
, *type2
;
3288 int qualifiers
, storage
;
3290 while (tok
== '*') {
3298 qualifiers
|= VT_CONSTANT
;
3303 qualifiers
|= VT_VOLATILE
;
3311 type
->t
|= qualifiers
;
3314 /* XXX: clarify attribute handling */
3315 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3316 parse_attribute(ad
);
3318 /* recursive type */
3319 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3320 type1
.t
= 0; /* XXX: same as int */
3323 /* XXX: this is not correct to modify 'ad' at this point, but
3324 the syntax is not clear */
3325 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3326 parse_attribute(ad
);
3327 type_decl(&type1
, ad
, v
, td
);
3330 /* type identifier */
3331 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3335 if (!(td
& TYPE_ABSTRACT
))
3336 expect("identifier");
3340 storage
= type
->t
& VT_STORAGE
;
3341 type
->t
&= ~VT_STORAGE
;
3342 if (storage
& VT_STATIC
) {
3343 int saved_nocode_wanted
= nocode_wanted
;
3345 post_type(type
, ad
);
3346 nocode_wanted
= saved_nocode_wanted
;
3348 post_type(type
, ad
);
3350 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3351 parse_attribute(ad
);
3355 /* append type at the end of type1 */
3368 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3369 ST_FUNC
int lvalue_type(int t
)
3374 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3376 else if (bt
== VT_SHORT
)
3380 if (t
& VT_UNSIGNED
)
3381 r
|= VT_LVAL_UNSIGNED
;
3385 /* indirection with full error checking and bound check */
3386 ST_FUNC
void indir(void)
3388 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3389 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3393 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3395 vtop
->type
= *pointed_type(&vtop
->type
);
3396 /* Arrays and functions are never lvalues */
3397 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3398 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3399 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3400 /* if bound checking, the referenced pointer must be checked */
3401 #ifdef CONFIG_TCC_BCHECK
3402 if (tcc_state
->do_bounds_check
)
3403 vtop
->r
|= VT_MUSTBOUND
;
3408 /* pass a parameter to a function and do type checking and casting */
3409 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3414 func_type
= func
->c
;
3415 if (func_type
== FUNC_OLD
||
3416 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3417 /* default casting : only need to convert float to double */
3418 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3422 } else if (arg
== NULL
) {
3423 tcc_error("too many arguments to function");
3426 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3427 gen_assign_cast(&type
);
3431 /* parse an expression of the form '(type)' or '(expr)' and return its
3433 static void parse_expr_type(CType
*type
)
3439 if (parse_btype(type
, &ad
)) {
3440 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3447 static void parse_type(CType
*type
)
3452 if (!parse_btype(type
, &ad
)) {
3455 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3458 static void vpush_tokc(int t
)
3463 vsetc(&type
, VT_CONST
, &tokc
);
3466 ST_FUNC
void unary(void)
3468 int n
, t
, align
, size
, r
, sizeof_caller
;
3472 static int in_sizeof
= 0;
3474 sizeof_caller
= in_sizeof
;
3476 /* XXX: GCC 2.95.3 does not generate a table although it should be
3490 vpush_tokc(VT_INT
| VT_UNSIGNED
);
3494 vpush_tokc(VT_LLONG
);
3498 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
3502 vpush_tokc(VT_FLOAT
);
3506 vpush_tokc(VT_DOUBLE
);
3510 vpush_tokc(VT_LDOUBLE
);
3513 case TOK___FUNCTION__
:
3515 goto tok_identifier
;
3521 /* special function name identifier */
3522 len
= strlen(funcname
) + 1;
3523 /* generate char[len] type */
3528 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
3529 ptr
= section_ptr_add(data_section
, len
);
3530 memcpy(ptr
, funcname
, len
);
3535 #ifdef TCC_TARGET_PE
3536 t
= VT_SHORT
| VT_UNSIGNED
;
3542 /* string parsing */
3545 if (tcc_state
->warn_write_strings
)
3550 memset(&ad
, 0, sizeof(AttributeDef
));
3551 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, NULL
, 0);
3556 if (parse_btype(&type
, &ad
)) {
3557 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
3559 /* check ISOC99 compound literal */
3561 /* data is allocated locally by default */
3566 /* all except arrays are lvalues */
3567 if (!(type
.t
& VT_ARRAY
))
3568 r
|= lvalue_type(type
.t
);
3569 memset(&ad
, 0, sizeof(AttributeDef
));
3570 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, NULL
, 0);
3572 if (sizeof_caller
) {
3579 } else if (tok
== '{') {
3580 /* save all registers */
3582 /* statement expression : we do not accept break/continue
3583 inside as GCC does */
3584 block(NULL
, NULL
, NULL
, NULL
, 0, 1);
3599 /* functions names must be treated as function pointers,
3600 except for unary '&' and sizeof. Since we consider that
3601 functions are not lvalues, we only have to handle it
3602 there and in function calls. */
3603 /* arrays can also be used although they are not lvalues */
3604 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
3605 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
3607 mk_pointer(&vtop
->type
);
3613 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3615 boolean
.t
= VT_BOOL
;
3617 vtop
->c
.i
= !vtop
->c
.i
;
3618 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
3619 vtop
->c
.i
= vtop
->c
.i
^ 1;
3622 vseti(VT_JMP
, gtst(1, 0));
3633 /* in order to force cast, we add zero */
3635 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
3636 tcc_error("pointer not accepted for unary plus");
3646 unary_type(&type
); // Perform a in_sizeof = 0;
3647 size
= type_size(&type
, &align
);
3648 if (t
== TOK_SIZEOF
) {
3649 if (!(type
.t
& VT_VLA
)) {
3651 tcc_error("sizeof applied to an incomplete type");
3654 vla_runtime_type_size(&type
, &align
);
3659 vtop
->type
.t
|= VT_UNSIGNED
;
3662 case TOK_builtin_types_compatible_p
:
3671 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3672 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3673 vpushi(is_compatible_types(&type1
, &type2
));
3676 case TOK_builtin_constant_p
:
3678 int saved_nocode_wanted
, res
;
3681 saved_nocode_wanted
= nocode_wanted
;
3684 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
3686 nocode_wanted
= saved_nocode_wanted
;
3691 case TOK_builtin_frame_address
:
3697 if (tok
!= TOK_CINT
|| tokc
.i
< 0) {
3698 tcc_error("__builtin_frame_address only takes positive integers");
3705 vset(&type
, VT_LOCAL
, 0); /* local frame */
3707 mk_pointer(&vtop
->type
);
3708 indir(); /* -> parent frame */
3712 #ifdef TCC_TARGET_X86_64
3713 case TOK_builtin_va_arg_types
:
3715 /* This definition must be synced with stdarg.h */
3716 enum __va_arg_type
{
3717 __va_gen_reg
, __va_float_reg
, __va_stack
3725 bt
= type
.t
& VT_BTYPE
;
3726 if (bt
== VT_STRUCT
|| bt
== VT_LDOUBLE
) {
3728 } else if (bt
== VT_FLOAT
|| bt
== VT_DOUBLE
) {
3729 vpushi(__va_float_reg
);
3731 vpushi(__va_gen_reg
);
3751 goto tok_identifier
;
3753 /* allow to take the address of a label */
3754 if (tok
< TOK_UIDENT
)
3755 expect("label identifier");
3756 s
= label_find(tok
);
3758 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
3760 if (s
->r
== LABEL_DECLARED
)
3761 s
->r
= LABEL_FORWARD
;
3764 s
->type
.t
= VT_VOID
;
3765 mk_pointer(&s
->type
);
3766 s
->type
.t
|= VT_STATIC
;
3768 vset(&s
->type
, VT_CONST
| VT_SYM
, 0);
3773 // special qnan , snan and infinity values
3775 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
3779 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
3783 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
3792 expect("identifier");
3796 tcc_error("'%s' undeclared", get_tok_str(t
, NULL
));
3797 /* for simple function calls, we tolerate undeclared
3798 external reference to int() function */
3799 if (tcc_state
->warn_implicit_function_declaration
)
3800 tcc_warning("implicit declaration of function '%s'",
3801 get_tok_str(t
, NULL
));
3802 s
= external_global_sym(t
, &func_old_type
, 0);
3804 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
3805 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
3806 /* if referencing an inline function, then we generate a
3807 symbol to it if not already done. It will have the
3808 effect to generate code for it at the end of the
3809 compilation unit. Inline function as always
3810 generated in the text section. */
3812 put_extern_sym(s
, text_section
, 0, 0);
3813 r
= VT_SYM
| VT_CONST
;
3817 vset(&s
->type
, r
, s
->c
);
3818 /* if forward reference, we must point to s */
3819 if (vtop
->r
& VT_SYM
) {
3826 /* post operations */
3828 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
3831 } else if (tok
== '.' || tok
== TOK_ARROW
) {
3834 if (tok
== TOK_ARROW
)
3836 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
3840 /* expect pointer on structure */
3841 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
3842 expect("struct or union");
3846 while ((s
= s
->next
) != NULL
) {
3851 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, NULL
));
3852 /* add field offset to pointer */
3853 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
3856 /* change type to field type, and set to lvalue */
3857 vtop
->type
= s
->type
;
3858 vtop
->type
.t
|= qualifiers
;
3859 /* an array is never an lvalue */
3860 if (!(vtop
->type
.t
& VT_ARRAY
)) {
3861 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3862 #ifdef CONFIG_TCC_BCHECK
3863 /* if bound checking, the referenced pointer must be checked */
3864 if (tcc_state
->do_bounds_check
)
3865 vtop
->r
|= VT_MUSTBOUND
;
3869 } else if (tok
== '[') {
3875 } else if (tok
== '(') {
3881 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3882 /* pointer test (no array accepted) */
3883 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
3884 vtop
->type
= *pointed_type(&vtop
->type
);
3885 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
3889 expect("function pointer");
3892 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
3894 /* get return type */
3897 sa
= s
->next
; /* first parameter */
3900 /* compute first implicit argument if a structure is returned */
3901 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
3902 /* get some space for the returned structure */
3903 size
= type_size(&s
->type
, &align
);
3904 loc
= (loc
- size
) & -align
;
3906 ret
.r
= VT_LOCAL
| VT_LVAL
;
3907 /* pass it as 'int' to avoid structure arg passing
3909 vseti(VT_LOCAL
, loc
);
3914 /* return in register */
3915 if (is_float(ret
.type
.t
)) {
3916 ret
.r
= reg_fret(ret
.type
.t
);
3918 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
3927 gfunc_param_typed(s
, sa
);
3937 tcc_error("too few arguments to function");
3939 if (!nocode_wanted
) {
3940 gfunc_call(nb_args
);
3942 vtop
-= (nb_args
+ 1);
3945 vsetc(&ret
.type
, ret
.r
, &ret
.c
);
3953 ST_FUNC
void expr_prod(void)
3958 while (tok
== '*' || tok
== '/' || tok
== '%') {
3966 ST_FUNC
void expr_sum(void)
3971 while (tok
== '+' || tok
== '-') {
3979 static void expr_shift(void)
3984 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
3992 static void expr_cmp(void)
3997 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
3998 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4006 static void expr_cmpeq(void)
4011 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4019 static void expr_and(void)
4022 while (tok
== '&') {
4029 static void expr_xor(void)
4032 while (tok
== '^') {
4039 static void expr_or(void)
4042 while (tok
== '|') {
4049 /* XXX: fix this mess */
4050 static void expr_land_const(void)
4053 while (tok
== TOK_LAND
) {
4060 /* XXX: fix this mess */
4061 static void expr_lor_const(void)
4064 while (tok
== TOK_LOR
) {
4071 /* only used if non constant */
4072 static void expr_land(void)
4077 if (tok
== TOK_LAND
) {
4082 if (tok
!= TOK_LAND
) {
4092 static void expr_lor(void)
4097 if (tok
== TOK_LOR
) {
4102 if (tok
!= TOK_LOR
) {
4112 /* XXX: better constant handling */
4113 static void expr_cond(void)
4115 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
;
4117 CType type
, type1
, type2
;
4124 boolean
.t
= VT_BOOL
;
4130 if (tok
!= ':' || !gnu_ext
) {
4145 if (vtop
!= vstack
) {
4146 /* needed to avoid having different registers saved in
4148 if (is_float(vtop
->type
.t
)) {
4150 #ifdef TCC_TARGET_X86_64
4151 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4161 if (tok
== ':' && gnu_ext
) {
4169 sv
= *vtop
; /* save value to handle it later */
4170 vtop
--; /* no vpop so that FP stack is not flushed */
4178 bt1
= t1
& VT_BTYPE
;
4180 bt2
= t2
& VT_BTYPE
;
4181 /* cast operands to correct type according to ISOC rules */
4182 if (is_float(bt1
) || is_float(bt2
)) {
4183 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4184 type
.t
= VT_LDOUBLE
;
4185 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4190 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4191 /* cast to biggest op */
4193 /* convert to unsigned if it does not fit in a long long */
4194 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4195 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4196 type
.t
|= VT_UNSIGNED
;
4197 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4198 /* If one is a null ptr constant the result type
4200 if (is_null_pointer (vtop
))
4202 else if (is_null_pointer (&sv
))
4204 /* XXX: test pointer compatibility, C99 has more elaborate
4208 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4209 /* XXX: test function pointer compatibility */
4210 type
= bt1
== VT_FUNC
? type1
: type2
;
4211 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4212 /* XXX: test structure compatibility */
4213 type
= bt1
== VT_STRUCT
? type1
: type2
;
4214 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4215 /* NOTE: as an extension, we accept void on only one side */
4218 /* integer operations */
4220 /* convert to unsigned if it does not fit in an integer */
4221 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4222 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4223 type
.t
|= VT_UNSIGNED
;
4226 /* now we convert second operand */
4228 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4231 if (is_float(type
.t
)) {
4233 #ifdef TCC_TARGET_X86_64
4234 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4238 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4239 /* for long longs, we use fixed registers to avoid having
4240 to handle a complicated move */
4245 /* this is horrible, but we must also convert first
4249 /* put again first value and cast it */
4252 if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4262 static void expr_eq(void)
4268 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
4269 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
4270 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
4285 ST_FUNC
void gexpr(void)
4296 /* parse an expression and return its type without any side effect. */
4297 static void expr_type(CType
*type
)
4299 int saved_nocode_wanted
;
4301 saved_nocode_wanted
= nocode_wanted
;
4306 nocode_wanted
= saved_nocode_wanted
;
4309 /* parse a unary expression and return its type without any side
4311 static void unary_type(CType
*type
)
4323 /* parse a constant expression and return value in vtop. */
4324 static void expr_const1(void)
4333 /* parse an integer constant and return its value. */
4334 ST_FUNC
int expr_const(void)
4338 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
4339 expect("constant expression");
4345 /* return the label token if current token is a label, otherwise
4347 static int is_label(void)
4351 /* fast test first */
4352 if (tok
< TOK_UIDENT
)
4354 /* no need to save tokc because tok is an identifier */
4361 unget_tok(last_tok
);
4366 static void label_or_decl(int l
)
4370 /* fast test first */
4371 if (tok
>= TOK_UIDENT
)
4373 /* no need to save tokc because tok is an identifier */
4377 unget_tok(last_tok
);
4380 unget_tok(last_tok
);
4385 static void block(int *bsym
, int *csym
, int *case_sym
, int *def_sym
,
4386 int case_reg
, int is_expr
)
4389 Sym
*s
, *frame_bottom
;
4391 /* generate line number info */
4392 if (tcc_state
->do_debug
&&
4393 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
4394 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
4396 last_line_num
= file
->line_num
;
4400 /* default return value is (void) */
4402 vtop
->type
.t
= VT_VOID
;
4405 if (tok
== TOK_IF
) {
4412 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4414 if (c
== TOK_ELSE
) {
4418 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, 0);
4419 gsym(d
); /* patch else jmp */
4422 } else if (tok
== TOK_WHILE
) {
4430 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4434 } else if (tok
== '{') {
4438 /* record local declaration stack position */
4440 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4441 frame_bottom
->next
= scope_stack_bottom
;
4442 scope_stack_bottom
= frame_bottom
;
4443 llabel
= local_label_stack
;
4444 /* handle local labels declarations */
4445 if (tok
== TOK_LABEL
) {
4448 if (tok
< TOK_UIDENT
)
4449 expect("label identifier");
4450 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
4460 while (tok
!= '}') {
4461 label_or_decl(VT_LOCAL
);
4465 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4468 /* pop locally defined labels */
4469 label_pop(&local_label_stack
, llabel
);
4471 /* XXX: this solution makes only valgrind happy...
4472 triggered by gcc.c-torture/execute/20000917-1.c */
4474 switch(vtop
->type
.t
& VT_BTYPE
) {
4479 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
4481 tcc_error("unsupported expression type");
4484 /* pop locally defined symbols */
4485 scope_stack_bottom
= scope_stack_bottom
->next
;
4486 sym_pop(&local_stack
, s
);
4488 } else if (tok
== TOK_RETURN
) {
4492 gen_assign_cast(&func_vt
);
4493 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
4495 /* if returning structure, must copy it to implicit
4496 first pointer arg location */
4499 size
= type_size(&func_vt
,&align
);
4502 if((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) || (vtop
->c
.i
& 3))
4506 loc
= (loc
- size
) & -4;
4509 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
4512 vset(&int_type
, VT_LOCAL
| VT_LVAL
, addr
);
4514 vtop
->type
= int_type
;
4520 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
4523 /* copy structure value to pointer */
4528 } else if (is_float(func_vt
.t
)) {
4529 gv(rc_fret(func_vt
.t
));
4533 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
4536 rsym
= gjmp(rsym
); /* jmp */
4537 } else if (tok
== TOK_BREAK
) {
4540 tcc_error("cannot break");
4541 *bsym
= gjmp(*bsym
);
4544 } else if (tok
== TOK_CONTINUE
) {
4547 tcc_error("cannot continue");
4548 *csym
= gjmp(*csym
);
4551 } else if (tok
== TOK_FOR
) {
4556 frame_bottom
= sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
4557 frame_bottom
->next
= scope_stack_bottom
;
4558 scope_stack_bottom
= frame_bottom
;
4560 /* c99 for-loop init decl? */
4561 if (!decl0(VT_LOCAL
, 1)) {
4562 /* no, regular for-loop init expr */
4586 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4590 scope_stack_bottom
= scope_stack_bottom
->next
;
4591 sym_pop(&local_stack
, s
);
4593 if (tok
== TOK_DO
) {
4598 block(&a
, &b
, case_sym
, def_sym
, case_reg
, 0);
4609 if (tok
== TOK_SWITCH
) {
4613 /* XXX: other types than integer */
4614 case_reg
= gv(RC_INT
);
4618 b
= gjmp(0); /* jump to first case */
4620 block(&a
, csym
, &b
, &c
, case_reg
, 0);
4621 /* if no default, jmp after switch */
4629 if (tok
== TOK_CASE
) {
4636 if (gnu_ext
&& tok
== TOK_DOTS
) {
4640 tcc_warning("empty case range");
4642 /* since a case is like a label, we must skip it with a jmp */
4649 *case_sym
= gtst(1, 0);
4652 *case_sym
= gtst(1, 0);
4656 *case_sym
= gtst(1, *case_sym
);
4661 goto block_after_label
;
4663 if (tok
== TOK_DEFAULT
) {
4669 tcc_error("too many 'default'");
4672 goto block_after_label
;
4674 if (tok
== TOK_GOTO
) {
4676 if (tok
== '*' && gnu_ext
) {
4680 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
4683 } else if (tok
>= TOK_UIDENT
) {
4684 s
= label_find(tok
);
4685 /* put forward definition if needed */
4687 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4689 if (s
->r
== LABEL_DECLARED
)
4690 s
->r
= LABEL_FORWARD
;
4692 /* label already defined */
4693 if (s
->r
& LABEL_FORWARD
)
4694 s
->jnext
= gjmp(s
->jnext
);
4696 gjmp_addr(s
->jnext
);
4699 expect("label identifier");
4702 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
4710 if (s
->r
== LABEL_DEFINED
)
4711 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
4713 s
->r
= LABEL_DEFINED
;
4715 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
4718 /* we accept this, but it is a mistake */
4721 tcc_warning("deprecated use of label at end of compound statement");
4725 block(bsym
, csym
, case_sym
, def_sym
, case_reg
, is_expr
);
4728 /* expression case */
4743 /* t is the array or struct type. c is the array or struct
4744 address. cur_index/cur_field is the pointer to the current
4745 value. 'size_only' is true if only size info is needed (only used
4747 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
4748 int *cur_index
, Sym
**cur_field
,
4752 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
4758 if (gnu_ext
&& (l
= is_label()) != 0)
4760 while (tok
== '[' || tok
== '.') {
4762 if (!(type
->t
& VT_ARRAY
))
4763 expect("array type");
4766 index
= expr_const();
4767 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
4768 expect("invalid index");
4769 if (tok
== TOK_DOTS
&& gnu_ext
) {
4771 index_last
= expr_const();
4772 if (index_last
< 0 ||
4773 (s
->c
>= 0 && index_last
>= s
->c
) ||
4775 expect("invalid index");
4781 *cur_index
= index_last
;
4782 type
= pointed_type(type
);
4783 elem_size
= type_size(type
, &align
);
4784 c
+= index
* elem_size
;
4785 /* NOTE: we only support ranges for last designator */
4786 nb_elems
= index_last
- index
+ 1;
4787 if (nb_elems
!= 1) {
4796 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
4797 expect("struct/union type");
4810 /* XXX: fix this mess by using explicit storage field */
4812 type1
.t
|= (type
->t
& ~VT_TYPE
);
4826 if (type
->t
& VT_ARRAY
) {
4828 type
= pointed_type(type
);
4829 c
+= index
* type_size(type
, &align
);
4833 tcc_error("too many field init");
4834 /* XXX: fix this mess by using explicit storage field */
4836 type1
.t
|= (type
->t
& ~VT_TYPE
);
4841 decl_initializer(type
, sec
, c
, 0, size_only
);
4843 /* XXX: make it more general */
4844 if (!size_only
&& nb_elems
> 1) {
4845 unsigned long c_end
;
4850 tcc_error("range init not supported yet for dynamic storage");
4851 c_end
= c
+ nb_elems
* elem_size
;
4852 if (c_end
> sec
->data_allocated
)
4853 section_realloc(sec
, c_end
);
4854 src
= sec
->data
+ c
;
4856 for(i
= 1; i
< nb_elems
; i
++) {
4858 memcpy(dst
, src
, elem_size
);
4864 #define EXPR_CONST 1
4867 /* store a value or an expression directly in global data or in local array */
4868 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
4869 int v
, int expr_type
)
4871 int saved_global_expr
, bt
, bit_pos
, bit_size
;
4873 unsigned long long bit_mask
;
4881 /* compound literals must be allocated globally in this case */
4882 saved_global_expr
= global_expr
;
4885 global_expr
= saved_global_expr
;
4886 /* NOTE: symbols are accepted */
4887 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
4888 tcc_error("initializer element is not constant");
4896 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
4899 /* XXX: not portable */
4900 /* XXX: generate error if incorrect relocation */
4901 gen_assign_cast(&dtype
);
4902 bt
= type
->t
& VT_BTYPE
;
4903 /* we'll write at most 12 bytes */
4904 if (c
+ 12 > sec
->data_allocated
) {
4905 section_realloc(sec
, c
+ 12);
4907 ptr
= sec
->data
+ c
;
4908 /* XXX: make code faster ? */
4909 if (!(type
->t
& VT_BITFIELD
)) {
4914 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
4915 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
4916 bit_mask
= (1LL << bit_size
) - 1;
4918 if ((vtop
->r
& VT_SYM
) &&
4924 (bt
== VT_INT
&& bit_size
!= 32)))
4925 tcc_error("initializer element is not computable at load time");
4928 vtop
->c
.i
= (vtop
->c
.i
!= 0);
4930 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4933 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4936 *(double *)ptr
= vtop
->c
.d
;
4939 *(long double *)ptr
= vtop
->c
.ld
;
4942 *(long long *)ptr
|= (vtop
->c
.ll
& bit_mask
) << bit_pos
;
4945 if (vtop
->r
& VT_SYM
) {
4946 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
4948 *(int *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
4953 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
4960 /* put zeros for variable based init */
4961 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
4964 /* nothing to do because globals are already set to zero */
4966 vpush_global_sym(&func_old_type
, TOK_memset
);
4974 /* 't' contains the type and storage info. 'c' is the offset of the
4975 object in section 'sec'. If 'sec' is NULL, it means stack based
4976 allocation. 'first' is true if array '{' must be read (multi
4977 dimension implicit array init handling). 'size_only' is true if
4978 size only evaluation is wanted (only for arrays). */
4979 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
4980 int first
, int size_only
)
4982 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
4983 int size1
, align1
, expr_type
;
4987 if (type
->t
& VT_VLA
) {
4988 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
4992 vpush_global_sym(&func_old_type
, TOK_alloca
);
4993 vla_runtime_type_size(type
, &a
);
4998 vsetc(type
, REG_IRET
, &retcval
);
4999 vset(type
, VT_LOCAL
|VT_LVAL
, c
);
5004 tcc_error("variable length arrays unsupported for this target");
5006 } else if (type
->t
& VT_ARRAY
) {
5010 t1
= pointed_type(type
);
5011 size1
= type_size(t1
, &align1
);
5014 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5017 tcc_error("character array initializer must be a literal,"
5018 " optionally enclosed in braces");
5023 /* only parse strings here if correct type (otherwise: handle
5024 them as ((w)char *) expressions */
5025 if ((tok
== TOK_LSTR
&&
5026 #ifdef TCC_TARGET_PE
5027 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5029 (t1
->t
& VT_BTYPE
) == VT_INT
5031 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5032 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5037 /* compute maximum number of chars wanted */
5039 cstr_len
= cstr
->size
;
5041 cstr_len
= cstr
->size
/ sizeof(nwchar_t
);
5044 if (n
>= 0 && nb
> (n
- array_length
))
5045 nb
= n
- array_length
;
5048 tcc_warning("initializer-string for array is too long");
5049 /* in order to go faster for common case (char
5050 string in global variable, we handle it
5052 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5053 memcpy(sec
->data
+ c
+ array_length
, cstr
->data
, nb
);
5057 ch
= ((unsigned char *)cstr
->data
)[i
];
5059 ch
= ((nwchar_t
*)cstr
->data
)[i
];
5060 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5068 /* only add trailing zero if enough storage (no
5069 warning in this case since it is standard) */
5070 if (n
< 0 || array_length
< n
) {
5072 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5078 while (tok
!= '}') {
5079 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5080 if (n
>= 0 && index
>= n
)
5081 tcc_error("index too large");
5082 /* must put zero in holes (note that doing it that way
5083 ensures that it even works with designators) */
5084 if (!size_only
&& array_length
< index
) {
5085 init_putz(t1
, sec
, c
+ array_length
* size1
,
5086 (index
- array_length
) * size1
);
5089 if (index
> array_length
)
5090 array_length
= index
;
5091 /* special test for multi dimensional arrays (may not
5092 be strictly correct if designators are used at the
5094 if (index
>= n
&& no_oblock
)
5103 /* put zeros at the end */
5104 if (!size_only
&& n
>= 0 && array_length
< n
) {
5105 init_putz(t1
, sec
, c
+ array_length
* size1
,
5106 (n
- array_length
) * size1
);
5108 /* patch type size if needed */
5110 s
->c
= array_length
;
5111 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5112 (sec
|| !first
|| tok
== '{')) {
5115 /* NOTE: the previous test is a specific case for automatic
5116 struct/union init */
5117 /* XXX: union needs only one init */
5119 /* XXX: this test is incorrect for local initializers
5120 beginning with ( without {. It would be much more difficult
5121 to do it correctly (ideally, the expression parser should
5122 be used in all cases) */
5128 while (tok
== '(') {
5132 if (!parse_btype(&type1
, &ad1
))
5134 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
5136 if (!is_assignable_types(type
, &type1
))
5137 tcc_error("invalid type for cast");
5142 if (first
|| tok
== '{') {
5151 while (tok
!= '}') {
5152 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
5154 if (!size_only
&& array_length
< index
) {
5155 init_putz(type
, sec
, c
+ array_length
,
5156 index
- array_length
);
5158 index
= index
+ type_size(&f
->type
, &align1
);
5159 if (index
> array_length
)
5160 array_length
= index
;
5162 /* gr: skip fields from same union - ugly. */
5164 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
5165 /* test for same offset */
5166 if (f
->next
->c
!= f
->c
)
5168 /* if yes, test for bitfield shift */
5169 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
5170 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5171 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5172 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
5173 if (bit_pos_1
!= bit_pos_2
)
5180 if (no_oblock
&& f
== NULL
)
5186 /* put zeros at the end */
5187 if (!size_only
&& array_length
< n
) {
5188 init_putz(type
, sec
, c
+ array_length
,
5197 } else if (tok
== '{') {
5199 decl_initializer(type
, sec
, c
, first
, size_only
);
5201 } else if (size_only
) {
5202 /* just skip expression */
5203 parlevel
= parlevel1
= 0;
5204 while ((parlevel
> 0 || parlevel1
> 0 ||
5205 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
5208 else if (tok
== ')')
5210 else if (tok
== '{')
5212 else if (tok
== '}')
5217 /* currently, we always use constant expression for globals
5218 (may change for scripting case) */
5219 expr_type
= EXPR_CONST
;
5221 expr_type
= EXPR_ANY
;
5222 init_putv(type
, sec
, c
, 0, expr_type
);
5226 /* parse an initializer for type 't' if 'has_init' is non zero, and
5227 allocate space in local or global data space ('r' is either
5228 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
5229 variable 'v' with an associated name represented by 'asm_label' of
5230 scope 'scope' is declared before initializers are parsed. If 'v' is
5231 zero, then a reference to the new object is put in the value stack.
5232 If 'has_init' is 2, a special parsing is done to handle string
5234 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
5235 int has_init
, int v
, char *asm_label
,
5238 int size
, align
, addr
, data_offset
;
5240 ParseState saved_parse_state
= {0};
5241 TokenString init_str
;
5243 Sym
*flexible_array
;
5245 flexible_array
= NULL
;
5246 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
5249 while (field
&& field
->next
)
5250 field
= field
->next
;
5251 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
5252 flexible_array
= field
;
5255 size
= type_size(type
, &align
);
5256 /* If unknown size, we must evaluate it before
5257 evaluating initializers because
5258 initializers can generate global data too
5259 (e.g. string pointers or ISOC99 compound
5260 literals). It also simplifies local
5261 initializers handling */
5262 tok_str_new(&init_str
);
5263 if (size
< 0 || (flexible_array
&& has_init
)) {
5265 tcc_error("unknown type size");
5266 /* get all init string */
5267 if (has_init
== 2) {
5268 /* only get strings */
5269 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5270 tok_str_add_tok(&init_str
);
5275 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
5277 tcc_error("unexpected end of file in initializer");
5278 tok_str_add_tok(&init_str
);
5281 else if (tok
== '}') {
5291 tok_str_add(&init_str
, -1);
5292 tok_str_add(&init_str
, 0);
5295 save_parse_state(&saved_parse_state
);
5297 macro_ptr
= init_str
.str
;
5299 decl_initializer(type
, NULL
, 0, 1, 1);
5300 /* prepare second initializer parsing */
5301 macro_ptr
= init_str
.str
;
5304 /* if still unknown size, error */
5305 size
= type_size(type
, &align
);
5307 tcc_error("unknown type size");
5310 size
+= flexible_array
->type
.ref
->c
* pointed_size(&flexible_array
->type
);
5311 /* take into account specified alignment if bigger */
5313 if (ad
->aligned
> align
)
5314 align
= ad
->aligned
;
5315 } else if (ad
->packed
) {
5318 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
5320 #ifdef CONFIG_TCC_BCHECK
5321 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5325 loc
= (loc
- size
) & -align
;
5327 #ifdef CONFIG_TCC_BCHECK
5328 /* handles bounds */
5329 /* XXX: currently, since we do only one pass, we cannot track
5330 '&' operators, so we add only arrays */
5331 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
5332 unsigned long *bounds_ptr
;
5333 /* add padding between regions */
5335 /* then add local bound info */
5336 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(unsigned long));
5337 bounds_ptr
[0] = addr
;
5338 bounds_ptr
[1] = size
;
5342 /* local variable */
5343 sym_push(v
, type
, r
, addr
);
5345 /* push local reference */
5346 vset(type
, r
, addr
);
5352 if (v
&& scope
== VT_CONST
) {
5353 /* see if the symbol was already defined */
5356 if (!is_compatible_types(&sym
->type
, type
))
5357 tcc_error("incompatible types for redefinition of '%s'",
5358 get_tok_str(v
, NULL
));
5359 if (sym
->type
.t
& VT_EXTERN
) {
5360 /* if the variable is extern, it was not allocated */
5361 sym
->type
.t
&= ~VT_EXTERN
;
5362 /* set array size if it was ommited in extern
5364 if ((sym
->type
.t
& VT_ARRAY
) &&
5365 sym
->type
.ref
->c
< 0 &&
5367 sym
->type
.ref
->c
= type
->ref
->c
;
5369 /* we accept several definitions of the same
5370 global variable. this is tricky, because we
5371 must play with the SHN_COMMON type of the symbol */
5372 /* XXX: should check if the variable was already
5373 initialized. It is incorrect to initialized it
5375 /* no init data, we won't add more to the symbol */
5382 /* allocate symbol in corresponding section */
5387 else if (tcc_state
->nocommon
)
5391 data_offset
= sec
->data_offset
;
5392 data_offset
= (data_offset
+ align
- 1) & -align
;
5394 /* very important to increment global pointer at this time
5395 because initializers themselves can create new initializers */
5396 data_offset
+= size
;
5397 #ifdef CONFIG_TCC_BCHECK
5398 /* add padding if bound check */
5399 if (tcc_state
->do_bounds_check
)
5402 sec
->data_offset
= data_offset
;
5403 /* allocate section space to put the data */
5404 if (sec
->sh_type
!= SHT_NOBITS
&&
5405 data_offset
> sec
->data_allocated
)
5406 section_realloc(sec
, data_offset
);
5407 /* align section if needed */
5408 if (align
> sec
->sh_addralign
)
5409 sec
->sh_addralign
= align
;
5411 addr
= 0; /* avoid warning */
5415 if (scope
!= VT_CONST
|| !sym
) {
5416 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
5417 sym
->asm_label
= asm_label
;
5419 /* update symbol definition */
5421 put_extern_sym(sym
, sec
, addr
, size
);
5424 /* put a common area */
5425 put_extern_sym(sym
, NULL
, align
, size
);
5426 /* XXX: find a nicer way */
5427 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
5428 esym
->st_shndx
= SHN_COMMON
;
5433 /* push global reference */
5434 sym
= get_sym_ref(type
, sec
, addr
, size
);
5436 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
5439 /* patch symbol weakness */
5440 if (type
->t
& VT_WEAK
)
5442 #ifdef CONFIG_TCC_BCHECK
5443 /* handles bounds now because the symbol must be defined
5444 before for the relocation */
5445 if (tcc_state
->do_bounds_check
) {
5446 unsigned long *bounds_ptr
;
5448 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
5449 /* then add global bound info */
5450 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(long));
5451 bounds_ptr
[0] = 0; /* relocated */
5452 bounds_ptr
[1] = size
;
5456 if (has_init
|| (type
->t
& VT_VLA
)) {
5457 decl_initializer(type
, sec
, addr
, 1, 0);
5458 /* restore parse state if needed */
5460 tok_str_free(init_str
.str
);
5461 restore_parse_state(&saved_parse_state
);
5463 /* patch flexible array member size back to -1, */
5464 /* for possible subsequent similar declarations */
5466 flexible_array
->type
.ref
->c
= -1;
5471 static void put_func_debug(Sym
*sym
)
5476 /* XXX: we put here a dummy type */
5477 snprintf(buf
, sizeof(buf
), "%s:%c1",
5478 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
5479 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
5480 cur_text_section
, sym
->c
);
5481 /* //gr gdb wants a line at the function */
5482 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
5487 /* parse an old style function declaration list */
5488 /* XXX: check multiple parameter */
5489 static void func_decl_list(Sym
*func_sym
)
5496 /* parse each declaration */
5497 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
5498 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
5499 if (!parse_btype(&btype
, &ad
))
5500 expect("declaration list");
5501 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5502 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5504 /* we accept no variable after */
5508 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5509 /* find parameter in function parameter list */
5512 if ((s
->v
& ~SYM_FIELD
) == v
)
5516 tcc_error("declaration for parameter '%s' but no such parameter",
5517 get_tok_str(v
, NULL
));
5519 /* check that no storage specifier except 'register' was given */
5520 if (type
.t
& VT_STORAGE
)
5521 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
5522 convert_parameter_type(&type
);
5523 /* we can add the type (NOTE: it could be local to the function) */
5525 /* accept other parameters */
5536 /* parse a function defined by symbol 'sym' and generate its code in
5537 'cur_text_section' */
5538 static void gen_function(Sym
*sym
)
5540 int saved_nocode_wanted
= nocode_wanted
;
5542 ind
= cur_text_section
->data_offset
;
5543 /* NOTE: we patch the symbol size later */
5544 put_extern_sym(sym
, cur_text_section
, ind
, 0);
5545 funcname
= get_tok_str(sym
->v
, NULL
);
5547 /* put debug symbol */
5548 if (tcc_state
->do_debug
)
5549 put_func_debug(sym
);
5550 /* push a dummy symbol to enable local sym storage */
5551 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
5552 gfunc_prolog(&sym
->type
);
5554 block(NULL
, NULL
, NULL
, NULL
, 0, 0);
5557 cur_text_section
->data_offset
= ind
;
5558 label_pop(&global_label_stack
, NULL
);
5559 /* reset local stack */
5560 scope_stack_bottom
= NULL
;
5561 sym_pop(&local_stack
, NULL
);
5562 /* end of function */
5563 /* patch symbol size */
5564 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
5566 /* patch symbol weakness (this definition overrules any prototype) */
5567 if (sym
->type
.t
& VT_WEAK
)
5569 if (tcc_state
->do_debug
) {
5570 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
5572 /* It's better to crash than to generate wrong code */
5573 cur_text_section
= NULL
;
5574 funcname
= ""; /* for safety */
5575 func_vt
.t
= VT_VOID
; /* for safety */
5576 ind
= 0; /* for safety */
5577 nocode_wanted
= saved_nocode_wanted
;
5580 ST_FUNC
void gen_inline_functions(void)
5583 int *str
, inline_generated
, i
;
5584 struct InlineFunc
*fn
;
5586 /* iterate while inline function are referenced */
5588 inline_generated
= 0;
5589 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5590 fn
= tcc_state
->inline_fns
[i
];
5592 if (sym
&& sym
->c
) {
5593 /* the function was used: generate its code and
5594 convert it to a normal function */
5595 str
= fn
->token_str
;
5598 strcpy(file
->filename
, fn
->filename
);
5599 sym
->r
= VT_SYM
| VT_CONST
;
5600 sym
->type
.t
&= ~VT_INLINE
;
5604 cur_text_section
= text_section
;
5606 macro_ptr
= NULL
; /* fail safe */
5608 inline_generated
= 1;
5611 if (!inline_generated
)
5614 for (i
= 0; i
< tcc_state
->nb_inline_fns
; ++i
) {
5615 fn
= tcc_state
->inline_fns
[i
];
5616 str
= fn
->token_str
;
5619 dynarray_reset(&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
);
5622 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
5623 static int decl0(int l
, int is_for_loop_init
)
5631 if (!parse_btype(&btype
, &ad
)) {
5632 if (is_for_loop_init
)
5634 /* skip redundant ';' */
5635 /* XXX: find more elegant solution */
5640 if (l
== VT_CONST
&&
5641 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5642 /* global asm block */
5646 /* special test for old K&R protos without explicit int
5647 type. Only accepted when defining global data */
5648 if (l
== VT_LOCAL
|| tok
< TOK_DEFINE
)
5652 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
5653 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
5655 /* we accept no variable after */
5659 while (1) { /* iterate thru each declaration */
5660 char *asm_label
; // associated asm label
5662 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
5666 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
5667 printf("type = '%s'\n", buf
);
5670 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5671 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
5672 tcc_error("function without file scope cannot be static");
5674 /* if old style function prototype, we accept a
5677 if (sym
->c
== FUNC_OLD
)
5678 func_decl_list(sym
);
5682 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
5685 asm_label_instr(&astr
);
5686 asm_label
= tcc_strdup(astr
.data
);
5689 /* parse one last attribute list, after asm label */
5690 parse_attribute(&ad
);
5695 #ifdef TCC_TARGET_PE
5697 type
.t
|= VT_IMPORT
;
5699 type
.t
|= VT_EXPORT
;
5703 tcc_error("cannot use local functions");
5704 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
5705 expect("function definition");
5707 /* reject abstract declarators in function definition */
5709 while ((sym
= sym
->next
) != NULL
)
5710 if (!(sym
->v
& ~SYM_FIELD
))
5711 expect("identifier");
5713 /* XXX: cannot do better now: convert extern line to static inline */
5714 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
5715 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5719 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
5722 r
= sym
->type
.ref
->r
;
5723 /* use func_call from prototype if not defined */
5724 if (FUNC_CALL(r
) != FUNC_CDECL
5725 && FUNC_CALL(type
.ref
->r
) == FUNC_CDECL
)
5726 FUNC_CALL(type
.ref
->r
) = FUNC_CALL(r
);
5728 /* use export from prototype */
5730 FUNC_EXPORT(type
.ref
->r
) = 1;
5732 /* use static from prototype */
5733 if (sym
->type
.t
& VT_STATIC
)
5734 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
5736 if (!is_compatible_types(&sym
->type
, &type
)) {
5738 tcc_error("incompatible types for redefinition of '%s'",
5739 get_tok_str(v
, NULL
));
5741 /* if symbol is already defined, then put complete type */
5744 /* put function symbol */
5745 sym
= global_identifier_push(v
, type
.t
, 0);
5746 sym
->type
.ref
= type
.ref
;
5749 /* static inline functions are just recorded as a kind
5750 of macro. Their code will be emitted at the end of
5751 the compilation unit only if they are used */
5752 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
5753 (VT_INLINE
| VT_STATIC
)) {
5754 TokenString func_str
;
5756 struct InlineFunc
*fn
;
5757 const char *filename
;
5759 tok_str_new(&func_str
);
5765 tcc_error("unexpected end of file");
5766 tok_str_add_tok(&func_str
);
5771 } else if (t
== '}') {
5773 if (block_level
== 0)
5777 tok_str_add(&func_str
, -1);
5778 tok_str_add(&func_str
, 0);
5779 filename
= file
? file
->filename
: "";
5780 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
5781 strcpy(fn
->filename
, filename
);
5783 fn
->token_str
= func_str
.str
;
5784 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
5787 /* compute text section */
5788 cur_text_section
= ad
.section
;
5789 if (!cur_text_section
)
5790 cur_text_section
= text_section
;
5791 sym
->r
= VT_SYM
| VT_CONST
;
5796 if (btype
.t
& VT_TYPEDEF
) {
5797 /* save typedefed type */
5798 /* XXX: test storage specifiers ? */
5799 sym
= sym_push(v
, &type
, INT_ATTR(&ad
), 0);
5800 sym
->type
.t
|= VT_TYPEDEF
;
5803 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
5804 /* external function definition */
5805 /* specific case for func_call attribute */
5806 type
.ref
->r
= INT_ATTR(&ad
);
5807 } else if (!(type
.t
& VT_ARRAY
)) {
5808 /* not lvalue if array */
5809 r
|= lvalue_type(type
.t
);
5811 has_init
= (tok
== '=');
5812 if (has_init
&& (type
.t
& VT_VLA
))
5813 tcc_error("Variable length array cannot be initialized");
5814 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
5815 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
5816 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
5817 /* external variable or function */
5818 /* NOTE: as GCC, uninitialized global static
5819 arrays of null size are considered as
5821 sym
= external_sym(v
, &type
, r
, asm_label
);
5823 if (type
.t
& VT_WEAK
)
5826 if (ad
.alias_target
) {
5831 alias_target
= sym_find(ad
.alias_target
);
5832 if (!alias_target
|| !alias_target
->c
)
5833 tcc_error("unsupported forward __alias__ attribute");
5834 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
5835 tsec
.sh_num
= esym
->st_shndx
;
5836 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
5839 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
5840 if (type
.t
& VT_STATIC
)
5846 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, asm_label
, l
);
5850 if (is_for_loop_init
)
5863 ST_FUNC
void decl(int l
)