[llvm-mca] Refactor event listeners to make the backend agnostic to event types.

Summary: This is a first step towards making the pipeline configurable.

Subscribers: llvm-commits, andreadb

Differential Revision: https://reviews.llvm.org/D44309

llvm-svn: 327389

1 files changed, 8 insertions, 1 deletions

diff --git a/llvm/tools/llvm-mca/Scheduler.h b/llvm/tools/llvm-mca/Scheduler.h
index 7bc28739746..81daaa72c15 100644
--- a/llvm/tools/llvm-mca/Scheduler.h
+++ b/llvm/tools/llvm-mca/Scheduler.h
@@ -24,6 +24,8 @@
 namespace mca {
 
 class Backend;
+class DispatchUnit;
+
 /// Used to notify the internal state of a processor resource.
 ///
 /// A processor resource is available if it is not reserved, and there are
@@ -455,7 +457,10 @@ class Scheduler {
   std::unique_ptr<LSUnit> LSU;
 
   // The Backend gets notified when instructions are ready/issued/executed.
-  Backend *Owner;
+  Backend *const Owner;
+
+  // The dispatch unit gets notified when instructions are executed.
+  DispatchUnit *DU;
 
   using QueueEntryTy = std::pair<unsigned, Instruction *>;
   std::map<unsigned, Instruction *> WaitQueue;
@@ -486,6 +491,8 @@ public:
                                       AssumeNoAlias)),
         Owner(B) {}
 
+  void setDispatchUnit(DispatchUnit *DispUnit) { DU = DispUnit; }
+
   /// Scheduling events.
   ///
   /// The DispatchUnit is responsible for querying the Scheduler before