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786d7d887a
As explained in r204976, because of how the allocation of VSX registers interacts with the call-lowering code, we sometimes end up generating self VSX copies. Specifically, things like this: %VSL2<def> = COPY %F2, %VSL2<imp-use,kill> (where %F2 is really a sub-register of %VSL2, and so this copy is a nop) This adds a small cleanup pass to remove these prior to post-RA scheduling. llvm-svn: 204980 |
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