[all-commits] [llvm/llvm-project] 04f9a8: [ConstraintElim] Move just before loop simplificat...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 04f9a8a7d67d18d42d0a7f0073d8c22e52f6de18
      https://github.com/llvm/llvm-project/commit/04f9a8a7d67d18d42d0a7f0073d8c22e52f6de18
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-09-22 (Fri, 22 Sep 2023)

  Changed paths:
    M llvm/lib/Passes/PassBuilderPipelines.cpp
    M llvm/test/Other/new-pm-defaults.ll
    M llvm/test/Other/new-pm-thinlto-postlink-defaults.ll
    M llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
    M llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
    M llvm/test/Other/new-pm-thinlto-prelink-defaults.ll
    M llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
    M llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll
    M llvm/test/Transforms/PhaseOrdering/AArch64/constraint-elimination-placement.ll

  Log Message:
  -----------
  [ConstraintElim] Move just before loop simplification pipeline.

Adjust the pipeline slightly to move ConstraintElim just before the loop
simplification pipeline. This increases the number of cases where SCEV
should can preserved in the future.

This also enables slightly more opportunities, by benefiting from
earlier CFG simplifications, which allow more conditions to be added.

Reviewed By: nikic, antoniofrighetto

Differential Revision: https://reviews.llvm.org/D158843