un-break remaining gdb buildbot testcases.

Make sure we do not generate line info for debugging-related frame setup.
Follow-up to r178361 / rdar://problem/12767564

llvm-svn: 178517

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
index d702b856cdc..374c824a204 100644
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -1147,7 +1147,13 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD,
                                                 "block.addr");
     unsigned Align = getContext().getDeclAlign(&selfDecl).getQuantity();
     Alloca->setAlignment(Align);
+    // Set the DebugLocation to empty, so the store is recognized as a
+    // frame setup instruction by llvm::DwarfDebug::beginFunction().
+    llvm::DebugLoc Empty;
+    llvm::DebugLoc Loc = Builder.getCurrentDebugLocation();
+    Builder.SetCurrentDebugLocation(Empty);
     Builder.CreateAlignedStore(BlockPointer, Alloca, Align);
+    Builder.SetCurrentDebugLocation(Loc);
     BlockPointerDbgLoc = Alloca;
   }