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Revert "Disable C99 VLA when alloca is unavailable."

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This reverts commit e3e5d4ad7a.
This commit is contained in:
Thomas Preud'homme 2011-02-05 02:31:11 +01:00
parent b0c50fbd4d
commit 4b8470f3ae
2 changed files with 2 additions and 10 deletions
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8
tccgen.c
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@ -3162,21 +3162,17 @@ static void post_type(CType *type, AttributeDef *ad)
n = -1;
if (tok != ']') {
gexpr();
#ifdef TOK_alloca
if ((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
#endif
n = vtop->c.i;
last_vtop = vtop;
if (n < 0)
error("invalid array size");
#ifdef TOK_alloca
} else {
if (!is_integer_btype(vtop->type.t & VT_BTYPE))
error("size of variable length array should be an integer");
type->t |= VT_VLA;
last_vtop = vtop;
}
#endif
}
skip(']');
/* parse next post type */
@ -4868,11 +4864,7 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
int a;
CValue retcval;
/* No need to coment all the block as it will never be called without
TOK_alloca defined (See ifdef TOK_alloca stanza in post_type */
#ifdef TOK_alloca
vpush_global_sym(&func_old_type, TOK_alloca);
#endif
vla_runtime_type_size(type, &a);
gfunc_call(1);

4
tests/tcctest.c
View file

@ -2010,7 +2010,7 @@ void old_style_function(void)
void alloca_test()
{
#ifdef TOK_alloca
#if defined __i386__ || defined __x86_64__
char *p = alloca(16);
strcpy(p,"123456789012345");
printf("alloca: p is %s\n", p);
@ -2022,7 +2022,7 @@ void alloca_test()
void c99_vla_test(int size1, int size2)
{
#ifdef TOK_alloca
#if defined __i386__ || defined __x86_64__
int tab1[size1 * size2][2], tab2[10][2];
void *tab1_ptr, *tab2_ptr;