[m-rev.] trivial diff: workaround cygwin C compiler bug

[Zoltan Somogyi]

On 29-Jan-2003, Mark Brown <dougl at cs.mu.OZ.AU> wrote:
> Wait, I think I see the problem.  We use the code addresses of those labels
> to look up the label layout info in a hash table, with the assumption that
> different labels will have different code addresses.  In this case,
> though, the code pointed to by the two labels happens to be identical,
> and the C compiler appears to recognise this and (quite rightly) merge the
> two pieces of code into one.  So I think our assumption is wrong.

The code generator is supposed to ensure that the assumption is right,
i.e. that there is code that cannot be optimized away between labels with
layout structures.

Can you mail me the test case?

Zoltan.
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