[polly] r261474 - [FIX] Compare SCEVs not values during SCEV expansion

[Johannes Doerfert via llvm-commits]

> On 02/21/2016 05:36 PM, Johannes Doerfert via llvm-commits wrote:
> >Author: jdoerfert
> >Date: Sun Feb 21 10:36:00 2016
> >New Revision: 261474
> >
> >URL: http://llvm.org/viewvc/llvm-project?rev=261474&view=rev
> >Log:
> >[FIX] Compare SCEVs not values during SCEV expansion
> >
> >   This fixes a compile time bug in SPEC2006 403.gcc, namely an endless
> >   recursion in the ScopExpander::visitUnknown function.
> 
> A test case would be good. Was there  a specific reason you could not add a
> test case?
I tried but could not generate one. Only when I run it with clang I
triggered the problem. Tried to extract the module as Polly sees it but
it didn't help.
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