Make -Wheader-hygiene not complain about USING_NAMESPACE_THROUGH_MACRO in a non-header file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128780 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 37 insertions, 2 deletions

diff --git a/lib/Analysis/ReachableCode.cpp b/lib/Analysis/ReachableCode.cpp
index 9659e9ec3e..9ac456f53a 100644
--- a/lib/Analysis/ReachableCode.cpp
+++ b/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/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 7ae104a542..67396be3b0 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/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/test/SemaCXX/warn-using-namespace-in-header.cpp b/test/SemaCXX/warn-using-namespace-in-header.cpp
index e040ca74cb..72c25529b4 100644
--- a/test/SemaCXX/warn-using-namespace-in-header.cpp
+++ b/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}}
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+// 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/test/SemaCXX/warn-using-namespace-in-header.h b/test/SemaCXX/warn-using-namespace-in-header.h
index 57bb5d91be..b544c548ae 100644
--- a/test/SemaCXX/warn-using-namespace-in-header.h
+++ b/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