I don't know how this ever compiled with gcc, but VC++ correctly rejects it.

llvm-svn: 22394
diff --git a/llvm/lib/Target/TargetSubtarget.cpp b/llvm/lib/Target/TargetSubtarget.cpp
index ebb1308..6fe9273 100644
--- a/llvm/lib/Target/TargetSubtarget.cpp
+++ b/llvm/lib/Target/TargetSubtarget.cpp
@@ -17,6 +17,6 @@
 //---------------------------------------------------------------------------
 // TargetSubtarget Class
 //
-TargetSubtarget::TargetSubtarget(const Module &M) {}
+TargetSubtarget::TargetSubtarget() {}
 
 TargetSubtarget::~TargetSubtarget() {}