+static cl::opt<bool> ViewBackground("view-background", cl::Hidden,
+ cl::desc("Execute graph viewer in the background. Creates tmp file litter."));
+
+std::string llvm::DOT::EscapeString(const std::string &Label) {
+ std::string Str(Label);
+ for (unsigned i = 0; i != Str.length(); ++i)
+ switch (Str[i]) {
+ case '\n':
+ Str.insert(Str.begin()+i, '\\'); // Escape character...
+ ++i;
+ Str[i] = 'n';
+ break;
+ case '\t':
+ Str.insert(Str.begin()+i, ' '); // Convert to two spaces
+ ++i;
+ Str[i] = ' ';
+ break;
+ case '\\':
+ if (i+1 != Str.length())
+ switch (Str[i+1]) {
+ case 'l': continue; // don't disturb \l
+ case '|': case '{': case '}':
+ Str.erase(Str.begin()+i); continue;
+ default: break;
+ }
+ case '{': case '}':
+ case '<': case '>':
+ case '|': case '"':
+ Str.insert(Str.begin()+i, '\\'); // Escape character...
+ ++i; // don't infinite loop
+ break;
+ }
+ return Str;
+}
+
+/// \brief Get a color string for this node number. Simply round-robin selects
+/// from a reasonable number of colors.
+StringRef llvm::DOT::getColorString(unsigned ColorNumber) {
+ static const int NumColors = 20;
+ static const char* Colors[NumColors] = {
+ "aaaaaa", "aa0000", "00aa00", "aa5500", "0055ff", "aa00aa", "00aaaa",
+ "555555", "ff5555", "55ff55", "ffff55", "5555ff", "ff55ff", "55ffff",
+ "ffaaaa", "aaffaa", "ffffaa", "aaaaff", "ffaaff", "aaffff"};
+ return Colors[ColorNumber % NumColors];
+}
+
+std::string llvm::createGraphFilename(const Twine &Name, int &FD) {
+ FD = -1;
+ SmallString<128> Filename;
+ error_code EC = sys::fs::createTemporaryFile(Name, "dot", FD, Filename);
+ if (EC) {
+ errs() << "Error: " << EC.message() << "\n";
+ return "";
+ }
+
+ errs() << "Writing '" << Filename << "'... ";
+ return Filename.str();
+}
+
+// Execute the graph viewer. Return true if successful.
+static bool LLVM_ATTRIBUTE_UNUSED
+ExecGraphViewer(StringRef ExecPath, std::vector<const char*> &args,
+ StringRef Filename, bool wait, std::string &ErrMsg) {
+ if (wait) {
+ if (sys::ExecuteAndWait(ExecPath, &args[0],0,0,0,0,&ErrMsg)) {
+ errs() << "Error: " << ErrMsg << "\n";
+ return false;
+ }
+ bool Existed;
+ sys::fs::remove(Filename, Existed);
+ errs() << " done. \n";
+ }
+ else {
+ sys::ExecuteNoWait(ExecPath, &args[0],0,0,0,&ErrMsg);
+ errs() << "Remember to erase graph file: " << Filename.str() << "\n";
+ }
+ return true;
+}
+
+void llvm::DisplayGraph(StringRef FilenameRef, bool wait,
+ GraphProgram::Name program) {
+ std::string Filename = FilenameRef;
+ wait &= !ViewBackground;