[patch] Fix PR middle-end/65958
Wed Nov 18 14:28:00 GMT 2015
> 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.
More information about the Gcc-patches