[llvm] r178058 - Update PEI's virtual-register-based scavenging to support multiple simultaneous mappings

Tue Apr 2 15:24:32 PDT 2013

> Hi Hal,
>
> Here is a reduced testcase.
>
> llc -O3 -mcpu=hexagonv5r regscavengerbug.ll
>
> HTH,
> Pranav

FWIW, I was able to reproduce this problem with the following SHA keys
LLVM - e737018a86fa3da37f74ec1757603f933efcf5aa DAGCombiner: Merge 
store/loads when we have extload/truncstores
Clang - 4ba49295274236084323fb68214bfb6aa7adc9eb [ms-cxxabi] Remove 
unused variable

Pranav

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