[llvm-reduce] Add flag to only run specific passes

Reviewed By: fhahn, hans

Differential Revision: https://reviews.llvm.org/D101278

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/tools/llvm-reduce/llvm-reduce.cpp b/llvm/tools/llvm-reduce/llvm-reduce.cpp
index 0499d496..5a00ef0 100644
--- a/llvm/tools/llvm-reduce/llvm-reduce.cpp
+++ b/llvm/tools/llvm-reduce/llvm-reduce.cpp
@@ -15,6 +15,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "DeltaManager.h"
+#include "TestRunner.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Verifier.h"
@@ -35,6 +36,11 @@ static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden,
 static cl::opt<bool> Version("v", cl::desc("Alias for -version"), cl::Hidden,
                              cl::cat(Options));
 
+static cl::opt<bool>
+    PrintDeltaPasses("print-delta-passes",
+                     cl::desc("Print list of delta passes, passable to "
+                              "--delta-passes as a comma separated list"));
+
 static cl::opt<std::string> InputFilename(cl::Positional, cl::Required,
                                           cl::desc("<input llvm ll/bc file>"),
                                           cl::cat(Options));
@@ -101,6 +107,11 @@ int main(int Argc, char **Argv) {
 
   cl::ParseCommandLineOptions(Argc, Argv, "LLVM automatic testcase reducer.\n");
 
+  if (PrintDeltaPasses) {
+    printDeltaPasses(errs());
+    return 0;
+  }
+
   LLVMContext Context;
   std::unique_ptr<Module> OriginalProgram =
       parseInputFile(InputFilename, Context);