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from d8d6388 Revert -r278269 [IndVarSimplify] Eliminate zext of a signed I [...] new a267310 Revert -r278267 [ValueTracking] An improvement to IR ValueTra [...] new cd61cee Remove missing file from r279433 reversal new 82a414c [X86] Only accept SM_SentinelUndef (-1) as an undefined shuff [...]

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Summary of changes: lib/Analysis/ValueTracking.cpp | 38 +---------- lib/Target/X86/X86ISelLowering.cpp | 6 +- test/Analysis/ValueTracking/iv-known-sign.ll | 97 ---------------------------- test/Transforms/BBVectorize/loop1.ll | 2 +- 4 files changed, 5 insertions(+), 138 deletions(-) delete mode 100644 test/Analysis/ValueTracking/iv-known-sign.ll