Debug Info: Fix an oversight of r186553. Ensure that the function prologue

of an artificial function gets an artificial location as well.

llvm-svn: 187074

1 files changed, 10 insertions, 3 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
index 6eeb911d21e..b090c4d3bf5 100644
--- a/clang/lib/CodeGen/CGDebugInfo.h
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -407,9 +407,11 @@ public:
 /// an artificial debug location that has a valid scope, but no line
 /// information. This is useful when emitting compiler-generated
 /// helper functions that have no source location associated with
-/// them.
+/// them. The DWARF specification allows the compiler to use the
+/// special line number 0 to indicate code that can not be attributed
+/// to any source location.
 ///
-/// This is necessary because pasing an empty SourceLocation to
+/// This is necessary because passing an empty SourceLocation to
 /// CGDebugInfo::setLocation() will result in the last valid location
 /// being reused.
 class ArtificialLocation {
@@ -418,7 +420,12 @@ class ArtificialLocation {
   CGBuilderTy &Builder;
 public:
   ArtificialLocation(CodeGenFunction &CGF, CGBuilderTy &B);
-  /// ~BuildinLocation - Autorestore everything back to normal.
+
+  /// Set the current location to line 0, but within the current scope
+  /// (= the top of the LexicalScopeStack).
+  void Emit();
+
+  /// ~ArtificialLocation - Autorestore everything back to normal.
   ~ArtificialLocation();
 };