Summary: This patch transforms the Scheduler class into the ExecuteStage. Most of the logic remains.
Reviewers: andreadb, RKSimon, courbet
Reviewed By: andreadb
Subscribers: mgorny, javed.absar, tschuett, gbedwell, llvm-commits
Differential Revision: https://reviews.llvm.org/D47246
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334679 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This class maintains the same logic as the original RetireControlUnit.
This is just an intermediate patch to make the RCU a Stage. Future patches will remove the dependency on the DispatchStage, and then more properly populate the pre/execute/post Stage interface.
Reviewers: andreadb, RKSimon, courbet
Reviewed By: andreadb, courbet
Subscribers: javed.absar, mgorny, tschuett, gbedwell, llvm-commits
Differential Revision: https://reviews.llvm.org/D47244
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333292 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This is an intermediate change, it moves the non-notification logic from
Backend::notifyCycleBegin to runCycle().
Once the scheduler becomes part of the Execution stage
the explicit call to Scheduler::cycleEvent will disappear.
The logic for Dispatch::cycleEvent() can be in
the preExecute phase, which this patch addresses.
Reviewers: andreadb, RKSimon, courbet
Reviewed By: andreadb
Subscribers: tschuett, gbedwell, llvm-commits
Differential Revision: https://reviews.llvm.org/D47213
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333029 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The logic of dispatch remains the same, but now DispatchUnit is a Stage (DispatchStage).
This change has the benefit of simplifying the backend runCycle() code.
The same logic applies, but it belongs to different components now. This is just a start,
eventually we will need to remove the call to the DispatchStage in Scheduler.cpp, but
that will be a separate patch. This change is mostly a renaming and moving of existing logic.
This change also encouraged me to remove the Subtarget (STI) member from the
Backend class. That member was used to initialize the other members of Backend
and to eventually call DispatchUnit::dispatch(). Now that we have Stages, we
can eliminate this by instantiating the DispatchStage with everything it needs
at the time of construction (e.g., Subtarget). That change allows us to call
DispatchStage::execute(IR) as we expect to call execute() for all other stages.
Once we add the Stage list (D46907) we can more cleanly call preExecute() on
all of the stages, DispatchStage, will probably wrap cycleEvent() in that
case.
Made some formatting and minor cleanups to README.txt. Some of the text
was re-flowed to stay within 80 cols.
Reviewers: andreadb, courbet, RKSimon
Reviewed By: andreadb, courbet
Subscribers: mgorny, javed.absar, tschuett, gbedwell, llvm-commits
Differential Revision: https://reviews.llvm.org/D46983
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332652 91177308-0d34-0410-b5e6-96231b3b80d8
