RFA: Examine PR2758

[Falk Hueffner]

Mark Mitchell <mark@codesourcery.com> writes:

> PR2758 is a C++ bug report for alphaev56-unknown-linux.  I don't
> have access to such a box, so I can't figure out if this is a
> regression and/or how to debug it.  The code works fine on x86.
> 
> If you have an alpha system, would you test this code?  If it
> doesn't fail any more, please close the report.  Otherwise, please
> check if it's a regression from 2.95.2, and downgrade it if not.
> Otherwise, we'll have to try to debug it.

I have an alphaev56-unknown-linux. The code segfaults with 3.0
20010426 (Debian prerelease). Today's CVS gives a bootstrap comparison
failure, so I couldn't try. I'll also try the 3.0 branch.

It doesn't crash with version 2.95.4 20010506 (Debian prerelease) or
with 2.95.2. The crash occurs at -O2 or higher. 

I have stripped the code down a bit, because I suspected a bug in the
code, but I couldn't find one. I've attached the stripped version.
Interestingly, for the stripped version, adding -finline-functions
doesn't help anymore.

	Falk