[all-commits] [llvm/llvm-project] dad3e3: [CodeGen] Fix incorrect rematerialization rollback...

[Lucas Ramirez via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dad3e30521b596cade7e3c516909657c44ed2840
      https://github.com/llvm/llvm-project/commit/dad3e30521b596cade7e3c516909657c44ed2840
  Author: Lucas Ramirez <11032120+lucas-rami at users.noreply.github.com>
  Date:   2026-07-14 (Tue, 14 Jul 2026)

  Changed paths:
    M llvm/include/llvm/CodeGen/Rematerializer.h
    M llvm/lib/CodeGen/Rematerializer.cpp
    M llvm/unittests/CodeGen/RematerializerTest.cpp

  Log Message:
  -----------
  [CodeGen] Fix incorrect rematerialization rollback order (#197576)

This fixes an issue in the rematerializer's rollbacker wherein adjacent
MIs that were deleted through rematerializations would
sometimes---depending on the exact order in which they were
deleted---not be re-created in their original pre-rematerialization
order. While this does not impact correctness (i.e., use-def relations
are always honored), this goes against the rollbacker's intent to
re-create the MIR exactly as it was pre-rematerializations (up to slot
index changes).



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