+/// \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::unique_file(Twine(Name) + "-%%%%%%%.dot",
+ FD, Filename);
+ if (EC) {
+ errs() << "Error: " << EC.message() << "\n";
+ return "";
+ }
+
+ errs() << "Writing '" << Filename << "'... ";
+ return Filename.str();
+}