[PATCH] D43774: [InstCombine] Add constant vector support to lookThroughFPExtensions for visitFPTrunc.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: spatel, scanon.

This patch teaches lookThroughFPExtensions to support shrinking a vector of ConstantFPs. This should improve our ability to combine vector fptrunc with fp binops.


Repository:
  rL LLVM

https://reviews.llvm.org/D43774

Files:
  lib/Transforms/InstCombine/InstCombineCasts.cpp
  test/Transforms/InstCombine/fpextend.ll

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