[all-commits] [llvm/llvm-project] 1c979a: [GVNSink] Fix incorrect codegen with respect to GE...

[AdityaK via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1c979ab7e59feb03c58cac631a93143b0c776c20
      https://github.com/llvm/llvm-project/commit/1c979ab7e59feb03c58cac631a93143b0c776c20
  Author: AdityaK <hiraditya at msn.com>
  Date:   2024-04-30 (Tue, 30 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Scalar/GVNSink.cpp
    A llvm/test/Transforms/GVNSink/different-gep-types.ll

  Log Message:
  -----------
  [GVNSink] Fix incorrect codegen with respect to GEPs #85333 (#88440)

As mentioned in #68882 and
https://discourse.llvm.org/t/rfc-replacing-getelementptr-with-ptradd/68699

Gep arithmetic isn't consistent with different types. GVNSink didn't
realize this and sank all geps
as long as their operands can be wired via PHIs
in a post-dominator.

Fixes: #85333



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