[PATCH] D38517: Enabling new pass manager in LTO (and thinLTO) link step via -fexperimental-new-pass-manager option

[Graham Yiu via Phabricator via llvm-commits]

gyiu updated this revision to Diff 117677.
gyiu added a comment.

Add new testcase to make sure plugin-opt is passed to gold linker to enable new pass manager.


Repository:
  rL LLVM

https://reviews.llvm.org/D38517

Files:
  lib/Driver/ToolChains/CommonArgs.cpp
  test/Driver/gold-lto-new-pass-man.c
  tools/gold/gold-plugin.cpp


Index: test/Driver/gold-lto-new-pass-man.c
===================================================================
--- /dev/null
+++ test/Driver/gold-lto-new-pass-man.c
@@ -0,0 +1,7 @@
+// RUN: touch %t.o
+//
+// RUN: %clang -target ppc64le-unknown-linux -### %t.o -flto 2>&1 \
+// RUN:     -Wl,-plugin-opt=foo -O3 \
+// RUN:     -fexperimental-new-pass-manager \
+// RUN:     | FileCheck %s
+// CHECK: "-plugin-opt=new-pass-manager"
Index: lib/Driver/ToolChains/CommonArgs.cpp
===================================================================
--- lib/Driver/ToolChains/CommonArgs.cpp
+++ lib/Driver/ToolChains/CommonArgs.cpp
@@ -454,6 +454,14 @@
       CmdArgs.push_back(
           Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
   }
+
+  // Need this flag to turn on new pass manager via Gold plugin.
+  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
+                   options::OPT_fno_experimental_new_pass_manager,
+                   /* Default */ false)) {
+    CmdArgs.push_back("-plugin-opt=new-pass-manager");
+  }
+
 }
 
 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
Index: tools/gold/gold-plugin.cpp
===================================================================
--- tools/gold/gold-plugin.cpp
+++ tools/gold/gold-plugin.cpp
@@ -183,6 +183,8 @@
   static std::vector<const char *> extra;
   // Sample profile file path
   static std::string sample_profile;
+  // New pass manager
+  static bool new_pass_manager = false;
 
   static void process_plugin_option(const char *opt_)
   {
@@ -242,6 +244,8 @@
       DisableVerify = true;
     } else if (opt.startswith("sample-profile=")) {
       sample_profile= opt.substr(strlen("sample-profile="));
+    } else if (opt == "new-pass-manager") {
+      new_pass_manager = true;
     } else {
       // Save this option to pass to the code generator.
       // ParseCommandLineOptions() expects argv[0] to be program name. Lazily
@@ -810,6 +814,9 @@
   if (!options::sample_profile.empty())
     Conf.SampleProfile = options::sample_profile;
 
+  // Use new pass manager if set in driver
+  Conf.UseNewPM = options::new_pass_manager;
+
   return llvm::make_unique<LTO>(std::move(Conf), Backend,
                                 options::ParallelCodeGenParallelismLevel);
 }


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