Matthew Simpson 659f92e2aa Revert "[LV] Extend trunc optimization to all IVs with constant integer steps"
This reverts commit r294967. This patch caused execution time slowdowns in a
few LLVM test-suite tests, as reported by the clang-cmake-aarch64-quick bot.
I'm reverting to investigate.

llvm-svn: 294973
2017-02-13 18:02:35 +00:00
2017-02-10 17:13:28 +00:00
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