allow llvm-reduce, if asked, to run its set of passes more than once, taking longer to finish but also potentially resulting in a smaller reduced file.

1 files changed, 7 insertions, 1 deletions

diff --git a/llvm/tools/llvm-reduce/llvm-reduce.cpp b/llvm/tools/llvm-reduce/llvm-reduce.cpp
index 11e3dd0..e07351a 100644
--- a/llvm/tools/llvm-reduce/llvm-reduce.cpp
+++ b/llvm/tools/llvm-reduce/llvm-reduce.cpp
@@ -88,6 +88,12 @@ static cl::opt<std::string> TargetTriple("mtriple",
                                          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) {
@@ -161,7 +167,7 @@ int main(int Argc, char **Argv) {
   TestRunner Tester(TestFilename, TestArguments, std::move(OriginalProgram));
 
   // Try to reduce code
-  runDeltaPasses(Tester);
+  runDeltaPasses(Tester, MaxPassIterations);
 
   // Print reduced file to STDOUT
   if (OutputFilename == "-")