[gold] Add debug-pass-manager option, and use it to test new-pass-manager

Summary: Follow up from r314963.

Reviewers: pcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45293

llvm-svn: 329249

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/tools/gold/gold-plugin.cpp b/llvm/tools/gold/gold-plugin.cpp
index ebd6260d9b7..d2d0e77d719 100644
--- a/llvm/tools/gold/gold-plugin.cpp
+++ b/llvm/tools/gold/gold-plugin.cpp
@@ -197,6 +197,8 @@ namespace options {
   static std::string sample_profile;
   // New pass manager
   static bool new_pass_manager = false;
+  // Debug new pass manager
+  static bool debug_pass_manager = false;
 
   static void process_plugin_option(const char *opt_)
   {
@@ -258,6 +260,8 @@ namespace options {
       sample_profile= opt.substr(strlen("sample-profile="));
     } else if (opt == "new-pass-manager") {
       new_pass_manager = true;
+    } else if (opt == "debug-pass-manager") {
+      debug_pass_manager = true;
     } else {
       // Save this option to pass to the code generator.
       // ParseCommandLineOptions() expects argv[0] to be program name. Lazily
@@ -853,6 +857,8 @@ static std::unique_ptr<LTO> createLTO(IndexWriteCallback OnIndexWrite,
 
   // Use new pass manager if set in driver
   Conf.UseNewPM = options::new_pass_manager;
+  // Debug new pass manager if requested
+  Conf.DebugPassManager = options::debug_pass_manager;
 
   return llvm::make_unique<LTO>(std::move(Conf), Backend,
                                 options::ParallelCodeGenParallelismLevel);