[PATCH] D49250: [llvm-mca] Add cycleBegin/cycleEnd callbacks to mca::Stage.

[Matt Davis via Phabricator via llvm-commits]

mattd created this revision.
mattd added reviewers: andreadb, courbet, RKSimon.
Herald added subscribers: gbedwell, tschuett.

This patch removes the preExecute and postExecute callbacks, and introduces 
cycleStart/cycleEnd callbacks.

This clears up some of the semantics within the Stage class.  Previously preExecute was
only called once per cycle, and postExecute could have been called multiple
times.

cycleStart/cycleEnd are called only once per simulated cycle.
These new callbacks take the cycle number as input, while that value
is not needed at this time, I figured that future user-defined stages 
might find that data useful.

If we do want to keep pre/post execute callbacks around, I can introduce 
them (I have a separate patch), but I like this simpler version.


https://reviews.llvm.org/D49250

Files:
  tools/llvm-mca/DispatchStage.cpp
  tools/llvm-mca/DispatchStage.h
  tools/llvm-mca/ExecuteStage.cpp
  tools/llvm-mca/ExecuteStage.h
  tools/llvm-mca/FetchStage.cpp
  tools/llvm-mca/FetchStage.h
  tools/llvm-mca/Pipeline.cpp
  tools/llvm-mca/Pipeline.h
  tools/llvm-mca/RetireStage.cpp
  tools/llvm-mca/RetireStage.h
  tools/llvm-mca/Stage.h

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