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from 4b5784c [X86][AVX] Add 32-bit target tests for vector lzcnt/tzcnt to [...] new 9e0c61c [LoopUnroll] Keep the loop test only on the first iteration o [...]

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Summary of changes: include/llvm/Analysis/ScalarEvolution.h | 32 +++++-- include/llvm/Transforms/Utils/UnrollLoop.h | 5 +- lib/Analysis/ScalarEvolution.cpp | 57 +++++++++---- lib/Transforms/Scalar/LoopUnrollPass.cpp | 28 ++++--- lib/Transforms/Utils/LoopUnroll.cpp | 13 +-- test/Analysis/ScalarEvolution/trip-count13.ll | 8 +- test/Analysis/ScalarEvolution/trip-count14.ll | 16 ++-- .../LoopUnroll/full-unroll-keep-first-exit.ll} | 98 ++++++++++++++-------- 8 files changed, 167 insertions(+), 90 deletions(-) copy test/{Analysis/ScalarEvolution/trip-count14.ll => Transforms/LoopUnroll/full- [...]