Matthias Braun 5b9722d6c7 Revert "RegScavenging: Add scavengeRegisterBackwards()"
Reverting this commit for now as it seems to be causing failures on
test-suite tests on the clang-ppc64le-linux-lnt bot.

This reverts commit r276044.

llvm-svn: 276068
2016-07-20 00:21:32 +00:00
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