[PATCH] D42051: [ARM] Allow the scheduler to clone a node with glue to avoid a copy CPSR ↔ GPR.

[Roger Ferrer Ibanez via Phabricator via llvm-commits]

rogfer01 updated this revision to Diff 130418.
rogfer01 retitled this revision from "[ARM] Avoid having to schedule a copy between CPSR and GPR in Thumb1 mode" to "[ARM] Allow the scheduler to clone a node with glue to avoid a copy CPSR ↔ GPR.".
rogfer01 edited the summary of this revision.
rogfer01 added a comment.
Herald added a subscriber: MatzeB.

Hi @efriedma gluing the nodes is too disruptive so I am exploring one of the alternatives you suggested. What do you think, does this look workable?


https://reviews.llvm.org/D42051

Files:
  include/llvm/CodeGen/TargetInstrInfo.h
  lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
  lib/Target/ARM/Thumb1InstrInfo.cpp
  lib/Target/ARM/Thumb1InstrInfo.h
  test/CodeGen/Thumb/pr35836.ll
  test/CodeGen/Thumb/pr35836_2.ll

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