Initial support for struct-path aware TBAA.
Added TBAABaseType and TBAAOffset in LValue. These two fields are initialized to
the actual type and 0, and are updated in EmitLValueForField.
Path-aware TBAA tags are enabled for EmitLoadOfScalar and EmitStoreOfScalar.
Added command line option -struct-path-tbaa.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178797 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index fcd4830..5b2153e 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -501,6 +501,11 @@
llvm::MDNode *getTBAAInfo(QualType QTy);
llvm::MDNode *getTBAAInfoForVTablePtr();
llvm::MDNode *getTBAAStructInfo(QualType QTy);
+ /// Return the MDNode in the type DAG for the given struct type.
+ llvm::MDNode *getTBAAStructTypeInfo(QualType QTy);
+ /// Return the path-aware tag for given base type, access node and offset.
+ llvm::MDNode *getTBAAStructTagInfo(QualType BaseTy, llvm::MDNode *AccessN,
+ uint64_t O);
bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);