diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h
index b6486e76763..ed651bf1a2b 100644
--- a/include/llvm/ADT/StringRef.h
+++ b/include/llvm/ADT/StringRef.h
@@ -198,7 +198,7 @@ namespace llvm {
 
     /// find_first_of - Find the first character in the string that is \arg C,
     /// or npos if not found. Same as find.
-    size_type find_first_of(char C, size_t From = 0) const { return find(C); }
+    size_type find_first_of(char C, size_t = 0) const { return find(C); }
 
     /// find_first_of - Find the first character in the string that is in \arg
     /// Chars, or npos if not found.
diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h
index 416f9120bbf..109ff74c1b6 100644
--- a/include/llvm/CodeGen/AsmPrinter.h
+++ b/include/llvm/CodeGen/AsmPrinter.h
@@ -180,11 +180,11 @@ namespace llvm {
 
     /// EmitStartOfAsmFile - This virtual method can be overridden by targets
     /// that want to emit something at the start of their file.
-    virtual void EmitStartOfAsmFile(Module &M) {}
+    virtual void EmitStartOfAsmFile(Module &) {}
     
     /// EmitEndOfAsmFile - This virtual method can be overridden by targets that
     /// want to emit something at the end of their file.
-    virtual void EmitEndOfAsmFile(Module &M) {}
+    virtual void EmitEndOfAsmFile(Module &) {}
     
     /// doFinalization - Shut down the asmprinter.  If you override this in your
     /// pass, you must make sure to call it explicitly.