[all-commits] [llvm/llvm-project] d48c78: [InlineCost] GetElementPtr with constant operands

[KirillVNaumov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d48c7859fbb911045b34ecd7f816186b9357d894
      https://github.com/llvm/llvm-project/commit/d48c7859fbb911045b34ecd7f816186b9357d894
  Author: Kirill Naumov <knaumov at azul.com>
  Date:   2020-06-25 (Thu, 25 Jun 2020)

  Changed paths:
    M llvm/lib/Analysis/InlineCost.cpp
    A llvm/test/Transforms/Inline/gep_from_constant.ll

  Log Message:
  -----------
  [InlineCost] GetElementPtr with constant operands

If the GEP instruction contanins only constants as its arguments,
then it should be recognized as a constant. For now, there was
also added a flag to turn off this simplification if it causes
any regressions ("disable-gep-const-evaluation") which is off
by default. Once I gather needed data of the effectiveness of
this simplification, the flag will be deleted.

Reviewers: apilipenko, davidxl, mtrofin

Reviewed By: mtrofin

Differential Revision: https://reviews.llvm.org/D81026