[PATCH] D70213: [ModuloSchedule] Fix a bug in experimental expander during prologue/epilogue stitching.

[Thomas Raoux via Phabricator via llvm-commits]

ThomasRaoux created this revision.
ThomasRaoux added a reviewer: jmolloy.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

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


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70213

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

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