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tccgen: scopes levels for local symbols (update 2)

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allow
    typedef int xxx;
    typedef int xxx;
in the same scope as long as it is the same type
This commit is contained in:
grischka
2016-05-06 08:32:54 +02:00
parent d48662d496
commit a94e8d439a
3 changed files with 21 additions and 17 deletions
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25
tccgen.c
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@ -2927,13 +2927,10 @@ static void struct_decl(CType *type, AttributeDef *ad, int u)
if (v < TOK_IDENT)
expect("struct/union/enum name");
s = struct_find(v);
if (s && s->type.t == a) {
if (0 == local_scope)
goto do_decl; /* compatibility with past behavior */
if (tok != '{' && tok != ';')
goto do_decl; /* variable declaration: 'struct s x;' */
if (s->scope == local_scope && (s->c == -1 || tok != '{'))
goto do_decl; /* at least one must be incomplete type */
if (s && (s->scope == local_scope || (tok != '{' && tok != ';'))) {
if (s->type.t != a)
tcc_error("redefinition of '%s'", get_tok_str(v, NULL));
goto do_decl;
}
} else {
v = anon_sym++;
@ -3435,8 +3432,6 @@ static void post_type(CType *type, AttributeDef *ad)
plast = &first;
arg_size = 0;
if (tok != ')') {
int ls = local_scope;
local_scope = 1; /* for struct decl inside function params */
for(;;) {
/* read param name and compute offset */
if (l != FUNC_OLD) {
@ -3476,7 +3471,6 @@ static void post_type(CType *type, AttributeDef *ad)
break;
}
}
local_scope = ls;
}
/* if no parameters, then old type prototype */
if (l == 0)
@ -6434,7 +6428,16 @@ static int decl0(int l, int is_for_loop_init)
if (btype.t & VT_TYPEDEF) {
/* save typedefed type */
/* XXX: test storage specifiers ? */
sym = sym_push(v, &type, 0, 0);
sym = sym_find(v);
if (sym && sym->scope == local_scope) {
if (!is_compatible_types(&sym->type, &type)
|| !(sym->type.t & VT_TYPEDEF))
tcc_error("incompatible redefinition of '%s'",
get_tok_str(v, NULL));
sym->type = type;
} else {
sym = sym_push(v, &type, 0, 0);
}
sym->a = ad.a;
sym->type.t |= VT_TYPEDEF;
} else {