> Looks good to me. I also found the Arrays of Variable Length section > in extend.texi which also refers to alloca as doing the same. We may > want to add a note there that you should not mix both and that only > VLAs (when not mixed with alloca) are freed at scope boundary.
It's already there and in fact the current behavior is documented: There are other differences between these two methods. Space allocated with `alloca' exists until the containing _function_ returns. The space for a variable-length array is deallocated as soon as the array name's scope ends. (If you use both variable-length arrays and `alloca' in the same function, deallocation of a variable-length array also deallocates anything more recently allocated with `alloca'.) so we need to amend the documentation if we go for the patch. -- Eric Botcazou
