Make debug info work when using -save-temps.

 - This is pretty ugly, but the most obvious solution. Chime in if you
   have a nicer one.

 - The problem is that with -save-temps, clang-cc has no idea what the
   name of the original input file is. However, the user expects to be
   able to set breakpoints based on the input file name.

 - We support this by providing a new option -main-file-name (similar
   to -dumpbase used by gcc) which allows the driver to pass in the
   original file name.

 - <rdar://problem/6753383> building with clang using --save-temps
   gets the compile unit name from the .i file...


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68595 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index f746edb65f..f95024dd88 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -76,6 +76,11 @@ private:
                    // signed.  Set/Query this value using accessors.  
   unsigned SymbolVisibility  : 3; // Symbol's visibility.
 
+  /// The user provided name for the "main file", if non-null. This is
+  /// useful in situations where the input file name does not match
+  /// the original input file, for example with -save-temps.
+  const char *MainFileName;
+
 public:  
   unsigned InstantiationDepth;    // Maximum template instantiation depth.
 
@@ -110,11 +115,16 @@ public:
     OptimizeSize = 0;
 
     PICLevel = 0;
+
+    MainFileName = 0;
   }
   
   GCMode getGCMode() const { return (GCMode) GC; }
   void setGCMode(GCMode m) { GC = (unsigned) m; }
 
+  const char *getMainFileName() const { return MainFileName; }
+  void setMainFileName(const char *Name) { MainFileName = Name; }
+
   VisibilityMode getVisibilityMode() const { return (VisibilityMode) SymbolVisibility; }
   void setVisibilityMode(VisibilityMode v) { SymbolVisibility = (unsigned) v; }