Initial checkin of bugpoint
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4789 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/BugDriver.cpp b/tools/bugpoint/BugDriver.cpp
new file mode 100644
index 0000000..0343f63
--- /dev/null
+++ b/tools/bugpoint/BugDriver.cpp
@@ -0,0 +1,100 @@
+//===- BugDriver.cpp - Top-Level BugPoint class implementation ------------===//
+//
+// This class contains all of the shared state and information that is used by
+// the BugPoint tool to track down errors in optimizations. This class is the
+// main driver class that invokes all sub-functionality.
+//
+//===----------------------------------------------------------------------===//
+
+#include "BugDriver.h"
+#include "llvm/Module.h"
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Assembly/Parser.h"
+#include "llvm/Transforms/Utils/Linker.h"
+#include "llvm/Pass.h"
+#include <memory>
+
+/// ParseInputFile - Given a bytecode or assembly input filename, parse and
+/// return it, or return null if not possible.
+///
+Module *BugDriver::ParseInputFile(const std::string &InputFilename) const {
+ Module *Result = 0;
+ try {
+ Result = ParseBytecodeFile(InputFilename);
+ if (!Result && !(Result = ParseAssemblyFile(InputFilename))){
+ std::cerr << ToolName << ": could not read input file '"
+ << InputFilename << "'!\n";
+ }
+ } catch (const ParseException &E) {
+ std::cerr << ToolName << ": " << E.getMessage() << "\n";
+ Result = 0;
+ }
+ return Result;
+}
+
+// This method takes the specified list of LLVM input files, attempts to load
+// them, either as assembly or bytecode, then link them together.
+//
+bool BugDriver::addSources(const std::vector<std::string> &Filenames) {
+ assert(Program == 0 && "Cannot call addSources multiple times!");
+ assert(!Filenames.empty() && "Must specify at least on input filename!");
+
+ // Load the first input file...
+ Program = ParseInputFile(Filenames[0]);
+ if (Program == 0) return true;
+ std::cout << "Read input file : '" << Filenames[0] << "'\n";
+
+ for (unsigned i = 1, e = Filenames.size(); i != e; ++i) {
+ std::auto_ptr<Module> M(ParseInputFile(Filenames[i]));
+ if (M.get() == 0) return true;
+
+ std::cout << "Linking in input file: '" << Filenames[i] << "'\n";
+ std::string ErrorMessage;
+ if (LinkModules(Program, M.get(), &ErrorMessage)) {
+ std::cerr << ToolName << ": error linking in '" << Filenames[i] << "': "
+ << ErrorMessage << "\n";
+ return true;
+ }
+ }
+
+ std::cout << "*** All input ok\n";
+
+ // All input files read successfully!
+ return false;
+}
+
+
+
+/// run - The top level method that is invoked after all of the instance
+/// variables are set up from command line arguments.
+///
+bool BugDriver::run() {
+ // The first thing that we must do is determine what the problem is. Does the
+ // optimization series crash the compiler, or does it produce illegal code? We
+ // make the top-level decision by trying to run all of the passes on the the
+ // input program, which should generate a bytecode file. If it does generate
+ // a bytecode file, then we know the compiler didn't crash, so try to diagnose
+ // a miscompilation.
+ //
+ std::cout << "Running selected passes on program to test for crash: ";
+ if (runPasses(PassesToRun))
+ return debugCrash();
+ else
+ return debugMiscompilation();
+}
+
+
+/// debugMiscompilation - This method is used when the passes selected are not
+/// crashing, but the generated output is semantically different from the
+/// input.
+///
+bool BugDriver::debugMiscompilation() {
+ std::cout << "*** Debugging miscompilation!\n";
+ std::cerr << "Sorry, bugpoint cannot debug a miscompilation yet!\n";
+
+ // If no reference output was specified, run the program without optimizations
+ // to get a reference output.
+ //
+
+ return true;
+}