#undef DELTA_PASS
}
-void llvm::runDeltaPasses(TestRunner &Tester) {
- if (DeltaPasses.empty()) {
- runAllDeltaPasses(Tester);
- } else {
- StringRef Passes = DeltaPasses;
- while (!Passes.empty()) {
- auto Split = Passes.split(",");
- runDeltaPassName(Tester, Split.first);
- Passes = Split.second;
+// FIXME: We might want to use a different metric than "number of
+// bytes in serialized IR" to detect non-progress of the main delta
+// loop
+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()) {
+ runAllDeltaPasses(Tester);
+ } else {
+ StringRef Passes = DeltaPasses;
+ while (!Passes.empty()) {
+ auto Split = Passes.split(",");
+ runDeltaPassName(Tester, Split.first);
+ Passes = Split.second;
+ }
}
+ int NewSize = getIRSize(Tester);
+ if (NewSize >= OldSize)
+ break;
+ OldSize = NewSize;
}
}
cl::desc("Set the target triple"),
cl::cat(Options));
+static cl::opt<int>
+ MaxPassIterations("max-pass-iterations",
+ cl::desc("Maximum number of times to run the full set "
+ "of delta passes (default=1)"),
+ cl::init(1), cl::cat(Options));
+
static codegen::RegisterCodeGenFlags CGF;
void writeOutput(ReducerWorkItem &M, StringRef Message) {
TestRunner Tester(TestFilename, TestArguments, std::move(OriginalProgram));
// Try to reduce code
- runDeltaPasses(Tester);
+ runDeltaPasses(Tester, MaxPassIterations);
// Print reduced file to STDOUT
if (OutputFilename == "-")