[LV] Remove unnecessary DoExtraAnalysis guard (silent bug)
canVectorize is only checking if the loop has a normalized pre-header if DoExtraAnalysis is true.
This doesn't make sense to me because reporting analysis information shouldn't alter legality
checks. This is probably the result of a last minute minor change before committing (?).
Patch by Diego Caballero.
Reviewed By: fhahn
Differential Revision: https://reviews.llvm.org/D40973
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321172
91177308-0d34-0410-b5e6-
96231b3b80d8
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