Refactor Sema::LookupDecl() into 2 functions: LookupDeclInScope() and LookupDeclInContext().

The previous interface was very confusing. This is much more explicit, which will be easier to understand/optimize/convert.

The plan is to eventually deprecate both of these functions. For now, I'm focused on performance.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63256 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 55317db..743fa12 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -61,7 +61,7 @@
     return Diag(OpLoc, diag::err_need_header_before_typeid);
   
   IdentifierInfo *TypeInfoII = &PP.getIdentifierTable().get("type_info");
-  Decl *TypeInfoDecl = LookupDecl(TypeInfoII, Decl::IDNS_Tag, 0, StdNs);
+  Decl *TypeInfoDecl = LookupDeclInContext(TypeInfoII, Decl::IDNS_Tag, StdNs);
   RecordDecl *TypeInfoRecordDecl = dyn_cast_or_null<RecordDecl>(TypeInfoDecl);
   if (!TypeInfoRecordDecl)
     return Diag(OpLoc, diag::err_need_header_before_typeid);