[all-commits] [llvm/llvm-project] 7d7001: [InstCombine] Restrict a GEP transform to avoid ch...

[Simonas Kazlauskas via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7d7001b2cbd05bb1955c18e7f8668644bd1258dc
      https://github.com/llvm/llvm-project/commit/7d7001b2cbd05bb1955c18e7f8668644bd1258dc
  Author: Simonas Kazlauskas <git at kazlauskas.me>
  Date:   2021-03-14 (Sun, 14 Mar 2021)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/getelementptr.ll

  Log Message:
  -----------
  [InstCombine] Restrict a GEP transform to avoid changing provenance

This is an alternative to D98120. Herein, instead of deleting the transformation entirely, we check
that the underlying objects are both the same and therefore this transformation wouldn't incur a
provenance change, if applied.

https://alive2.llvm.org/ce/z/SYF_yv

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D98588