Add a TODO and explain when we can get rid of the isMain field.

llvm-svn: 175932

include/llvm/DebugInfo.h

@@ -192,7 +192,7 @@ namespace llvm {
     /// code generator accepts maximum one main compile unit per module. If a
     /// module does not contain any main compile unit then the code generator
     /// will emit multiple compile units in the output object file.
-
+    // TODO: This can be removed when we remove the legacy debug information.
     bool isMain() const                { return getUnsignedField(6) != 0; }
     bool isOptimized() const           { return getUnsignedField(7) != 0; }
     StringRef getFlags() const       { return getStringField(8);   }

lib/IR/DIBuilder.cpp

@@ -98,7 +98,7 @@ void DIBuilder::createCompileUnit(unsigned Lang, StringRef Filename,
     MDString::get(VMContext, Filename),
     MDString::get(VMContext, Directory),
     MDString::get(VMContext, Producer),
-    // Deprecate isMain field.
+    // isMain field can be removed when we remove the legacy debug info.
     ConstantInt::get(Type::getInt1Ty(VMContext), true), // isMain
     ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
     MDString::get(VMContext, Flags),