[ThinLTO] Enable ThinLTO WholeProgramDevirt and LowerTypeTests in new PM

Summary:
Enable these passes for CFI and WPD in ThinLTO and LTO with the new pass
manager. Add a couple of tests for both PMs based on the clang tests
tools/clang/test/CodeGen/thinlto-distributed-cfi*.ll, but just test
through llvm-lto2 and not with distributed ThinLTO.

Reviewers: pcc

Subscribers: mehdi_amini, inglorion, eraman, steven_wu, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D49429

llvm-svn: 337461

1 files changed, 8 insertions, 4 deletions

diff --git a/llvm/lib/LTO/LTOBackend.cpp b/llvm/lib/LTO/LTOBackend.cpp
index 0ead3989941..eadbb410bd5 100644
--- a/llvm/lib/LTO/LTOBackend.cpp
+++ b/llvm/lib/LTO/LTOBackend.cpp
@@ -144,7 +144,9 @@ createTargetMachine(Config &Conf, const Target *TheTarget, Module &M) {
 }
 
 static void runNewPMPasses(Config &Conf, Module &Mod, TargetMachine *TM,
-                           unsigned OptLevel, bool IsThinLTO) {
+                           unsigned OptLevel, bool IsThinLTO,
+                           ModuleSummaryIndex *ExportSummary,
+                           const ModuleSummaryIndex *ImportSummary) {
   Optional<PGOOptions> PGOOpt;
   if (!Conf.SampleProfile.empty())
     PGOOpt = PGOOptions("", "", Conf.SampleProfile, false, true);
@@ -194,9 +196,10 @@ static void runNewPMPasses(Config &Conf, Module &Mod, TargetMachine *TM,
   }
 
   if (IsThinLTO)
-    MPM = PB.buildThinLTODefaultPipeline(OL, Conf.DebugPassManager);
+    MPM = PB.buildThinLTODefaultPipeline(OL, Conf.DebugPassManager,
+                                         ImportSummary);
   else
-    MPM = PB.buildLTODefaultPipeline(OL, Conf.DebugPassManager);
+    MPM = PB.buildLTODefaultPipeline(OL, Conf.DebugPassManager, ExportSummary);
   MPM.run(Mod, MAM);
 
   // FIXME (davide): verify the output.
@@ -279,7 +282,8 @@ bool opt(Config &Conf, TargetMachine *TM, unsigned Task, Module &Mod,
     runNewPMCustomPasses(Mod, TM, Conf.OptPipeline, Conf.AAPipeline,
                          Conf.DisableVerify);
   else if (Conf.UseNewPM)
-    runNewPMPasses(Conf, Mod, TM, Conf.OptLevel, IsThinLTO);
+    runNewPMPasses(Conf, Mod, TM, Conf.OptLevel, IsThinLTO, ExportSummary,
+                   ImportSummary);
   else
     runOldPMPasses(Conf, Mod, TM, IsThinLTO, ExportSummary, ImportSummary);
   return !Conf.PostOptModuleHook || Conf.PostOptModuleHook(Task, Mod);