Re: [PATCH] Powerpc, fix vla-optimized-out.exp test

[Carl Love <cel@us.ibm.com>]

Will:

> 
> The variable in this case is actually just 'a'.   The vla reference
> in
> the exp appears to be a copy/paste leftover from the nearby vla-ptr.c
> test.

Ok

> 
> > On Powerpc, the use of vla and the size of vla are both optimized
> > out.
> 
> I fear this shortcuts the intent of the test.   Can you instead
> update
> the test in a way that prevents 'a' from being optimized out? 

The test is run with -O1 and -03 optimization levels.  The test talks
about the the effect of lower and higher optimization leves,
specifically:

    # At higher optimisation levels, the array bounds themselves have           
    # been removed.  As such GDB can't be expected to know if the               
    # array contains _any_ elements at all.  It seems reasonable in             
    # that case to reply with 'no such vector element'.  

It seems to me that the test expects the value to be optimized out. 
Since the comments clearly talk about effects of the variable being
optimized out, changing the test to ensure variable a is not optimized
out would actually be consistent the point of the test.

                       Carl Love