[all-commits] [llvm/llvm-project] 9d34b6: [InstSimplify] Fold ptrtoint(ptradd(P, X-ptrtoint(P...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9d34b673c0abea4ee0a3dd4c399314411b02f1cc
      https://github.com/llvm/llvm-project/commit/9d34b673c0abea4ee0a3dd4c399314411b02f1cc
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/lib/Analysis/InstructionSimplify.cpp
    M llvm/test/Transforms/InstSimplify/ptrtoint.ll

  Log Message:
  -----------
  [InstSimplify] Fold ptrtoint(ptradd(P,X-ptrtoint(P))) to X (#98649)

This is a special case of the general ptrtoint(gep) to add(ptrtoint)
transform that is particularly profitable, as everything folds away.

Proof: https://alive2.llvm.org/ce/z/fwv8_L

Fixes https://github.com/llvm/llvm-project/issues/86417.



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