[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, 15 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 7eb0af2d371..b48714f69b9 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2419,6 +2419,21 @@ llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) {
                                         FullName);
 }
 
+llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent,
+                                        unsigned MType, SourceLocation LineLoc,
+                                        StringRef Name, StringRef Value) {
+  unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
+  return DBuilder.createMacro(Parent, Line, MType, Name, Value);
+}
+
+llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent,
+                                                    SourceLocation LineLoc,
+                                                    SourceLocation FileLoc) {
+  llvm::DIFile *FName = getOrCreateFile(FileLoc);
+  unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
+  return DBuilder.createTempMacroFile(Parent, Line, FName);
+}
+
 static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C) {
   Qualifiers Quals;
   do {