[DebugInfo] Added support to Clang FE for generating debug info for preprocessor macros.

Added "-fdebug-macro" flag (and "-fno-debug-macro" flag) to enable (and to disable) emitting macro debug info.
Added CC1 "-debug-info-macro" flag that enables emitting macro debug info.

Differential Revision: https://reviews.llvm.org/D16135

llvm-svn: 294637

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
index ea451d0548c..050665e92e2 100644
--- a/clang/lib/CodeGen/CGDebugInfo.h
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -413,6 +413,16 @@ public:
 
   void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD);
 
+  /// Create debug info for a macro defined by a #define directive or a macro
+  /// undefined by a #undef directive.
+  llvm::DIMacro *CreateMacro(llvm::DIMacroFile *Parent, unsigned MType,
+                             SourceLocation LineLoc, StringRef Name,
+                             StringRef Value);
+
+  /// Create debug info for a file referenced by an #include directive.
+  llvm::DIMacroFile *CreateTempMacroFile(llvm::DIMacroFile *Parent,
+                                         SourceLocation LineLoc,
+                                         SourceLocation FileLoc);
 private:
   /// Emit call to llvm.dbg.declare for a variable declaration.
   void EmitDeclare(const VarDecl *decl, llvm::Value *AI,