__libc_use_alloca
if (__libc_use_alloca (n_options))
if (__libc_use_alloca (nmatch * sizeof (regmatch_t)))
if (__libc_use_alloca (sizeof (struct dests_alloc)))
if (__libc_use_alloca ((sizeof (re_node_set) + sizeof (bitset_t)) * SBC_MAX
bool use_alloca = __libc_use_alloca ((rear_ptr - w) * sizeof (CHAR_T));
buffer_malloced = ! __libc_use_alloca (wbuffer_to_alloc);
else if (__libc_use_alloca (len * sizeof (wchar_t))) \
if (__libc_use_alloca (prec)) \
if (__libc_use_alloca (len + 1)) \
if (__libc_use_alloca (needed))
if (__libc_use_alloca (needed))
if (__libc_use_alloca (needed))
if (__libc_use_alloca (nargs * bytes_per_arg))
if (__libc_use_alloca ((MAX (prec, width) + 32)
if (use_malloc || !__libc_use_alloca (newsize)) \