If preprocessed token introduced empty filename then use main translation unit's filename for debug info entries.

llvm-svn: 125672

clang/lib/CodeGen/CGDebugInfo.cpp

@@ -161,7 +161,7 @@ llvm::DIFile CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
   SourceManager &SM = CGM.getContext().getSourceManager();
   PresumedLoc PLoc = SM.getPresumedLoc(Loc);
 
-  if (PLoc.isInvalid())
+  if (PLoc.isInvalid() || llvm::StringRef(PLoc.getFilename()).empty())
     // If the location is not valid then use main input file.
     return DBuilder.CreateFile(TheCU.getFilename(), TheCU.getDirectory());
 

clang/test/CodeGen/debug-info-crash.c

@@ -19,3 +19,12 @@ dispatch_item_t LEGACY_dispatch_call(dispatch_queue_t dq,
     }
     );
 }
+
+// radar://9008853
+typedef struct P {
+  int x;
+} PS;
+# 1 ""
+void foo() {
+  PS p2;
+}