[gfortran, testsuite] Fix bounds checking for substrings, enable bounds chekcing in dg testsuite, assorted fixes

[Andrew Pinski]

On Fri, 2006-12-08 at 10:37 +0100, Tobias Burnus wrote:
> I like those, but I miss two: (a) -ftree-vectorize [suggested by FX]
> and
> (b) -fbounds-check [initial patch by Tobias S., see subject].  (Side
> note: I really miss the possibility to run tests in parallel.)

I have "-O2 -fbounds-check" there.  Also I was thinking about adding
-ftree-vectorize but then I remembered that the vectorizer was mostly
useless without -msse or -msse2 or -maltivec for the two major targets.
So adding -ftree-vectorize just makes us waste time. Only on ia64 and
SPU or x86 (with sse turned on by default) or PowerPC (with altivec
turned on by default) will cause -ftree-vectorize do anything.

Thanks,
Andrew Pinski