[PATCH] D52243: [ConstHoist]Do NOT rebase single-dependent of base constant

[Z. Zheng via Phabricator via llvm-commits]

zzheng created this revision.
zzheng added reviewers: efriedma, zinob.

If a Base constant A has only one dependent constant B, do NOT rebase B. One extra ADD instruction is required to materialize B, assuming A and B have the same cost.


Repository:
  rL LLVM

https://reviews.llvm.org/D52243

Files:
  lib/Transforms/Scalar/ConstantHoisting.cpp
  test/CodeGen/Thumb/consthoist-single-dependent.ll

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