[all-commits] [llvm/llvm-project] e0297a: [ModuloSchedule] Fix a bug in experimental expander

[Thomas via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e0297a8bee6586280640f31b876d4da15966f8b7
      https://github.com/llvm/llvm-project/commit/e0297a8bee6586280640f31b876d4da15966f8b7
  Author: Thomas Raoux <thomasraoux at google.com>
  Date:   2019-11-23 (Sat, 23 Nov 2019)

  Changed paths:
    M llvm/include/llvm/CodeGen/ModuloSchedule.h
    M llvm/lib/CodeGen/ModuloSchedule.cpp
    M llvm/test/CodeGen/Hexagon/swp-epilog-phi12.ll
    M llvm/test/CodeGen/Hexagon/swp-stages4.ll

  Log Message:
  -----------
  [ModuloSchedule] Fix a bug in experimental expander

Fix two problems that popped up after my last patch. One is that the
stiching of prologue/epilogue can be wrong when reading a value from a
previsou stage. Also changed how we duplicate phi instructions to avoid
generating extra phi that we delete later.

Differential Revision: https://reviews.llvm.org/D70213