Periodic Segfaulting with Tuned Parameters

[kavon]

Here's a pretty simple program that segfaults when trying to call the reoptimized function:

// RUN: %atjitc   %s -o %t
// RUN: %t > %t.out
// RUN: %FileCheck %s < %t.out

#include <tuner/driver.h>
#include <tuner/param.h>

using namespace std::placeholders;
using namespace tuned_param;
using namespace easy::options;

size_t someGlobal = 0;

void randomLoop(int seed) {
  for (int i = 0; i < seed; i++)
    someGlobal += 1;
}

int main(int argc, char** argv) {

  tuner::AutoTuner TunerKind = tuner::AT_Bayes;
  const int ITERS = 500;
  tuner::ATDriver AT;

  for (int i = 0; i < ITERS; i++) {
    auto const &OptimizedFun = AT.reoptimize(randomLoop,
          IntRange(0, 32768),
          tuner_kind(TunerKind));

    OptimizedFun();
  }

  return 0;
}