4 files changed, 37 insertions, 2 deletions
diff --git a/clang/lib/Analysis/ReachableCode.cpp b/clang/lib/Analysis/ReachableCode.cpp
index 9659e9ec3ed..9ac456f53a6 100644
--- a/clang/lib/Analysis/ReachableCode.cpp
+++ b/clang/lib/Analysis/ReachableCode.cpp
@@ -193,7 +193,7 @@ unsigned ScanReachableFromBlock(const CFGBlock &Start,
   unsigned count = 0;
   llvm::SmallVector<const CFGBlock*, 32> WL;
 
-    // Prep work queue
+  // Prep work queue
   Reachable.set(Start.getBlockID());
   ++count;
   WL.push_back(&Start);
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 7ae104a5423..67396be3b02 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -3927,7 +3927,7 @@ Decl *Sema::ActOnUsingDirective(Scope *S,
                                       IdentLoc, Named, CommonAncestor);
 
     if (IsUsingDirectiveInToplevelContext(CurContext) &&
-        !SourceMgr.isFromMainFile(IdentLoc)) {
+        !SourceMgr.isFromMainFile(SourceMgr.getInstantiationLoc(IdentLoc))) {
       Diag(IdentLoc, diag::warn_using_directive_in_header);
     }
 
diff --git a/clang/test/SemaCXX/warn-using-namespace-in-header.cpp b/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
index e040ca74cbf..72c25529b40 100644
--- a/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
+++ b/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
@@ -25,3 +25,30 @@ using namespace dont_warn;
 
 
 // expected-warning {{using namespace directive in global context in header}}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+// expected-warning {{using namespace directive in global context in header}}
+
+// |using namespace| through a macro shouldn't warn if the instantiation is in a
+// cc file.
+USING_MACRO
diff --git a/clang/test/SemaCXX/warn-using-namespace-in-header.h b/clang/test/SemaCXX/warn-using-namespace-in-header.h
index 57bb5d91be4..b544c548ae9 100644
--- a/clang/test/SemaCXX/warn-using-namespace-in-header.h
+++ b/clang/test/SemaCXX/warn-using-namespace-in-header.h
@@ -40,3 +40,11 @@ using namespace warn_in_header_in_global_context;
 inline void foo() {
   using namespace warn_in_header_in_global_context;
 }
+
+
+namespace macronamespace {}
+#define USING_MACRO using namespace macronamespace;
+
+// |using namespace| through a macro should warn if the instantiation is in a
+// header.
+USING_MACRO