foo

[dblaikie]

Sounds OK - I think the old comment's unclear either though. (patch'll need a real description, though)

[eopXD]

llvm/tools/llvm-reduce/DeltaManager.cpp

110

Start sentences with uppercase letters?

And a better title please.

llvm/tools/llvm-reduce/DeltaManager.cpp

#define DELTA_PASS(NAME, FUNC) OS << "  " << NAME << "\n";
   OS << " IR:\n";
   DELTA_PASSES
   OS << " MIR:\n";
   DELTA_PASSES_MIR
 #undef DELTA_PASS
 }
 
 // FIXME: We may want to find a better metric than file size for
-// detecting reducer non-progress
+// determining when the reducer has stopped making useful progress
 static int getIRSize(TestRunner &Tester) {
   std::string Str;
   raw_string_ostream SS(Str);
   Tester.getProgram().print(SS, /*AnnotationWriter=*/nullptr);
   return Str.length();
 }
 
 void llvm::runDeltaPasses(TestRunner &Tester, int MaxPassIterations) {
   int OldSize = getIRSize(Tester);
   for (int Iter = 0; Iter < MaxPassIterations; ++Iter) {
     if (DeltaPasses.empty()) {