[PM] Port ModuleSummaryIndex analysis to new pass manager

Summary:
Port the ModuleSummaryAnalysisWrapperPass to the new pass manager.
Use it in the ported BitcodeWriterPass (similar to how we use the
legacy ModuleSummaryAnalysisWrapperPass in the legacy WriteBitcodePass).

Also, pass the -module-summary opt flag through to the new pass
manager pipeline and through to the bitcode writer pass, and add
a test that uses it.

Reviewers: mehdi_amini

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D23439

llvm-svn: 278508

llvm/lib/Bitcode/Writer/BitcodeWriterPass.cpp

@@ -19,12 +19,11 @@
 #include "llvm/Pass.h"
 using namespace llvm;
 
-PreservedAnalyses BitcodeWriterPass::run(Module &M, ModuleAnalysisManager &) {
-  std::unique_ptr<ModuleSummaryIndex> Index;
-  if (EmitSummaryIndex)
-    Index = ModuleSummaryIndexBuilder(&M).takeIndex();
-  WriteBitcodeToFile(&M, OS, ShouldPreserveUseListOrder, Index.get(),
-                     EmitModuleHash);
+PreservedAnalyses BitcodeWriterPass::run(Module &M, ModuleAnalysisManager &AM) {
+  const ModuleSummaryIndex *Index =
+      EmitSummaryIndex ? &(AM.getResult<ModuleSummaryIndexAnalysis>(M))
+                       : nullptr;
+  WriteBitcodeToFile(&M, OS, ShouldPreserveUseListOrder, Index, EmitModuleHash);
   return PreservedAnalyses::all();
 }