GeneticAutotunerATen::tune -> startingPoints defaults to {baseMapping}

Author: nicolasvasilache

include/tc/autotuner/genetic_autotuner_aten.h

@@ -43,7 +43,7 @@ class GeneticAutotunerATen {
       const std::string& tcName,
       const std::vector<at::Tensor>& inputs,
       CudaMappingOptions baseMapping,
-      std::vector<CudaMappingOptions> startingPoints,
+      std::vector<CudaMappingOptions> startingPoints = {},
       const TuningParameterFixer& fixedParams = {});
 
  private:

src/autotuner/genetic_autotuner_aten.cc

@@ -107,6 +107,9 @@ llvm::Optional<CudaMappingOptions> GeneticAutotunerATen::tune(
   tc::ScopeGuard g1([&]() { deleteGpuDlmTensors(managedInputsPerGpu); });
   tc::ScopeGuard g2([&]() { deleteGpuDlmTensors(managedOutputsPerGpu); });
 
+  if (startingPoints.size() == 0) {
+    startingPoints.push_back(baseMapping);
+  }
   return geneticAutotuner_->tune(
       cacheFileName,
       tcName,