Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/tools/bugpoint/FindBugs.cpp

@@ -1,100 +0,0 @@
-//===-- FindBugs.cpp - Run Many Different Optimizations -------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines an interface that allows bugpoint to choose different
-// combinations of optimizations to run on the selected input. Bugpoint will
-// run these optimizations and record the success/failure of each. This way
-// we can hopefully spot bugs in the optimizations.
-//
-//===----------------------------------------------------------------------===//
-
-#include "BugDriver.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/raw_ostream.h"
-#include <random>
-using namespace llvm;
-
-Error
-BugDriver::runManyPasses(const std::vector<std::string> &AllPasses) {
-  setPassesToRun(AllPasses);
-  outs() << "Starting bug finding procedure...\n\n";
-
-  // Creating a reference output if necessary
-  if (Error E = initializeExecutionEnvironment())
-    return E;
-
-  outs() << "\n";
-  if (ReferenceOutputFile.empty()) {
-    outs() << "Generating reference output from raw program: \n";
-    if (Error E = createReferenceFile(Program))
-      return E;
-  }
-
-  std::mt19937 randomness(std::random_device{}());
-  unsigned num = 1;
-  while (1) {
-    //
-    // Step 1: Randomize the order of the optimizer passes.
-    //
-    std::shuffle(PassesToRun.begin(), PassesToRun.end(), randomness);
-
-    //
-    // Step 2: Run optimizer passes on the program and check for success.
-    //
-    outs() << "Running selected passes on program to test for crash: ";
-    for (int i = 0, e = PassesToRun.size(); i != e; i++) {
-      outs() << "-" << PassesToRun[i] << " ";
-    }
-
-    std::string Filename;
-    if (runPasses(Program, PassesToRun, Filename, false)) {
-      outs() << "\n";
-      outs() << "Optimizer passes caused failure!\n\n";
-      return debugOptimizerCrash();
-    } else {
-      outs() << "Combination " << num << " optimized successfully!\n";
-    }
-
-    //
-    // Step 3: Compile the optimized code.
-    //
-    outs() << "Running the code generator to test for a crash: ";
-    if (Error E = compileProgram(Program)) {
-      outs() << "\n*** compileProgram threw an exception: ";
-      outs() << toString(std::move(E));
-      return debugCodeGeneratorCrash();
-    }
-    outs() << '\n';
-
-    //
-    // Step 4: Run the program and compare its output to the reference
-    // output (created above).
-    //
-    outs() << "*** Checking if passes caused miscompliation:\n";
-    Expected<bool> Diff = diffProgram(Program, Filename, "", false);
-    if (Error E = Diff.takeError()) {
-      errs() << toString(std::move(E));
-      return debugCodeGeneratorCrash();
-    }
-    if (*Diff) {
-      outs() << "\n*** diffProgram returned true!\n";
-      Error E = debugMiscompilation();
-      if (!E)
-        return Error::success();
-    }
-    outs() << "\n*** diff'd output matches!\n";
-
-    sys::fs::remove(Filename);
-
-    outs() << "\n\n";
-    num++;
-  } // end while
-
-  // Unreachable.
-}