[PATCH] D129958: [IndVars] Eliminate redundant type cast with different sizes

[Allen zhong via Phabricator via llvm-commits]

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Deal with different sizes between the itofp and fptoi with
trunc or sext/zext, depend on D129756 <https://reviews.llvm.org/D129756>.


https://reviews.llvm.org/D129958

Files:
  llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
  llvm/test/Transforms/IndVarSimplify/floating-point-small-iv.ll

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