[PATCH] D25318: [DAG] Don't increase SDNodeOrder for dbg.value/declare.

[Mikael Holmén via llvm-commits]

uabelho created this revision.
uabelho added a reviewer: bogner.
uabelho added a subscriber: llvm-commits.
Herald added a subscriber: MatzeB.

The SDNodeOrder is saved in the IROrder field in the SDNode, and this
field may affects scheduling. Thus, letting dbg.value/declare increase
the order numbers may in turn affect scheduling.

      

Because of this change we also need to update the code deciding when
dbg values should be output, in ScheduleDAGSDNodes.cpp/ProcessSDDbgValues.

      

Dbg values now have the same order as the SDNode they are connected to,
not the following orders.


https://reviews.llvm.org/D25318

Files:
  lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  test/DebugInfo/Generic/selectiondag-order.ll

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