[all-commits] [llvm/llvm-project] 352b61: [SCCP] Drop unnecessary early exit for ExtractValu...

[Florian Hahn via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 352b612a7141bdb07e8b043f4ec9b8c2d5faca45
      https://github.com/llvm/llvm-project/commit/352b612a7141bdb07e8b043f4ec9b8c2d5faca45
  Author: Florian Hahn <florian_hahn at apple.com>
  Date:   2020-04-22 (Wed, 22 Apr 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/SCCP.cpp
    M llvm/test/Transforms/SCCP/conditions-ranges.ll
    M llvm/test/Transforms/SCCP/constant-range-struct.ll

  Log Message:
  -----------
  [SCCP] Drop unnecessary early exit for ExtractValueInst.

visitExtractValueInst uses mergeInValue, so it already can handle
constant ranges. Initially the early exit was using isOverdefined to
keep things as NFC during the initial move to ValueLatticeElement.
As the function already supports constant ranges, it can just use
ValueState[&I].isOverdefined.

Reviewers: efriedma, mssimpso, davide

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D78393