Revert r246214 and r246213

These two commits causes llvm LTO bootstrap to hang in ScalarEvolution.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246282 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 22 deletions

diff --git a/lib/CodeGen/CGCXXABI.h b/lib/CodeGen/CGCXXABI.h
index 259c878f7f..5ef409ecde 100644
--- a/lib/CodeGen/CGCXXABI.h
+++ b/lib/CodeGen/CGCXXABI.h
@@ -218,10 +218,8 @@ public:
   virtual void emitThrow(CodeGenFunction &CGF, const CXXThrowExpr *E) = 0;
   virtual llvm::GlobalVariable *getThrowInfo(QualType T) { return nullptr; }
 
-  /// \brief Determine whether it's possible to emit a vtable for \p RD, even
-  /// though we do not know that the vtable has been marked as used by semantic
-  /// analysis.
-  virtual bool canSpeculativelyEmitVTable(const CXXRecordDecl *RD) const = 0;
+  virtual bool canEmitAvailableExternallyVTable(
+      const CXXRecordDecl *RD) const = 0;
 
   virtual void emitBeginCatch(CodeGenFunction &CGF, const CXXCatchStmt *C) = 0;
 
@@ -348,25 +346,13 @@ public:
   virtual void emitVTableDefinitions(CodeGenVTables &CGVT,
                                      const CXXRecordDecl *RD) = 0;
 
-  /// Checks if ABI requires extra virtual offset for vtable field.
-  virtual bool
-  isVirtualOffsetNeededForVTableField(CodeGenFunction &CGF,
-                                      CodeGenFunction::VPtr Vptr) = 0;
-
-  /// Checks if ABI requires to initilize vptrs for given dynamic class.
-  virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass) = 0;
-
-  /// Get the address point of the vtable for the given base subobject.
-  virtual llvm::Constant *
-  getVTableAddressPoint(BaseSubobject Base,
-                        const CXXRecordDecl *VTableClass) = 0;
-
   /// Get the address point of the vtable for the given base subobject while
-  /// building a constructor or a destructor.
-  virtual llvm::Value *
-  getVTableAddressPointInStructor(CodeGenFunction &CGF, const CXXRecordDecl *RD,
-                                  BaseSubobject Base,
-                                  const CXXRecordDecl *NearestVBase) = 0;
+  /// building a constructor or a destructor. On return, NeedsVirtualOffset
+  /// tells if a virtual base adjustment is needed in order to get the offset
+  /// of the base subobject.
+  virtual llvm::Value *getVTableAddressPointInStructor(
+      CodeGenFunction &CGF, const CXXRecordDecl *RD, BaseSubobject Base,
+      const CXXRecordDecl *NearestVBase, bool &NeedsVirtualOffset) = 0;
 
   /// Get the address point of the vtable for the given base subobject while
   /// building a constexpr.