[all-commits] [llvm/llvm-project] a19c7c: [MachinePipeliner] Fix store-store dependences (#7...

[bcahoon via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a19c7c403fa056a37585407586a2d84d03f41d8a
      https://github.com/llvm/llvm-project/commit/a19c7c403fa056a37585407586a2d84d03f41d8a
  Author: bcahoon <59846893+bcahoon at users.noreply.github.com>
  Date:   2023-12-11 (Mon, 11 Dec 2023)

  Changed paths:
    M llvm/lib/CodeGen/MachinePipeliner.cpp
    A llvm/test/CodeGen/PowerPC/sms-store-dependence.ll

  Log Message:
  -----------
  [MachinePipeliner] Fix store-store dependences (#72575)

The pipeliner needs to mark store-store order dependences as
loop carried dependences. Otherwise, the stores may be scheduled
further apart than the MII. The order dependences implies that
the first instance of the dependent store is scheduled before the
second instance of the source store instruction.