Array bounds checks

[Tom Tromey]

Hans> In particular multianewarray should potentially be able to tag
Hans> the arrays it allocates as rectangular and contiguously
Hans> allocated, and you should be able to check for that case here,
Hans> thus reducing multidimensional array access back to the Fortran
Hans> case (at the risk of retaining more memory than needed).  I have
Hans> no idea whether anyone has ever done this, or whether it's
Hans> really feasible/worthwhile.

I've read about someone doing it for Java, but I don't recall where.
I might be able to dig up a reference if pressed.

Currently we can't implement that because our array header is attached
directly to the data.  We'd have to add an indirection to make
contiguous multidimensional arrays work.

Tom