Revert "IRGen: Start using the WriteThinLTOBitcode pass."

[mboehme]

Summary

This reverts commit r292662.

This change broke internal builds. Will provide a reproducer internally.

lib/CodeGen/BackendUtil.cpp

void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
   CodeGenPasses.add(
       createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
 
   switch (Action) {
   case Backend_EmitNothing:
     break;
 
   case Backend_EmitBC:
-    if (CodeGenOpts.EmitSummaryIndex)
-      PerModulePasses.add(createWriteThinLTOBitcodePass(*OS));
-    else
-      PerModulePasses.add(
-          createBitcodeWriterPass(*OS, CodeGenOpts.EmitLLVMUseLists));
+    PerModulePasses.add(createBitcodeWriterPass(
+        *OS, CodeGenOpts.EmitLLVMUseLists, CodeGenOpts.EmitSummaryIndex,
+        CodeGenOpts.EmitSummaryIndex));
     break;
 
   case Backend_EmitLL:
     PerModulePasses.add(
         createPrintModulePass(*OS, "", CodeGenOpts.EmitLLVMUseLists));
     break;
 
   default:

test/CMakeLists.txt

 
 if( NOT CLANG_BUILT_STANDALONE )
   list(APPEND CLANG_TEST_DEPS
     llvm-config
     FileCheck count not
     llc
     llvm-bcanalyzer
     llvm-dis
-    llvm-modextract
     llvm-nm
     llvm-objdump
     llvm-profdata
     llvm-readobj
     llvm-symbolizer
     opt
     )
 

test/CodeGenCXX/type-metadata-thinlto.cpp

-// RUN: %clang_cc1 -flto=thin -flto-unit -triple x86_64-unknown-linux -fvisibility hidden -emit-llvm-bc -o %t %s
-// RUN: llvm-modextract -o - -n 1 %t | llvm-dis | FileCheck %s
-
-// CHECK: @_ZTV1A = linkonce_odr
-class A {
-  virtual void f() {}
-};
-
-A *f() {
-  return new A;
-}