[Scheduling] computeStartTimesInCycle: clear before recomputation (#6951

) This PR adds a `clearStartTimesInCycle()` method to the ChainingProblem to simplify the reuse of one problem instance for multiple solving attempts.
llvm · Apr 26, 2024 · d2ba096 · d2ba096
1 parent 416267b
commit d2ba096
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diff --git a/include/circt/Scheduling/Problems.h b/include/circt/Scheduling/Problems.h
@@ -373,6 +373,7 @@ class ChainingProblem : public virtual Problem {
   void setStartTimeInCycle(Operation *op, float time) {
     startTimeInCycle[op] = time;
   }
+  void clearStartTimeInCycle() { startTimeInCycle.clear(); }
 
   virtual PropertyStringVector getProperties(Operation *op) override;
   virtual PropertyStringVector getProperties(OperatorType opr) override;

diff --git a/lib/Scheduling/ChainingSupport.cpp b/lib/Scheduling/ChainingSupport.cpp
@@ -91,6 +91,7 @@ LogicalResult scheduling::computeChainBreakingDependences(
 }
 
 LogicalResult scheduling::computeStartTimesInCycle(ChainingProblem &prob) {
+  prob.clearStartTimeInCycle();
   return handleOperationsInTopologicalOrder(prob, [&](Operation *op) {
     // `op` will start within its abstract time step as soon as all operand
     // values have reached it.