Subzero: Enable errors for unused parameters.

src/IceCompiler.cpp

Index: src/IceCompiler.cpp
diff --git a/src/IceCompiler.cpp b/src/IceCompiler.cpp
index ff17d8476b362e78b49fe7300c68a18c392f09e9..7764b71dfeca941054c7a6b7ba2f89ee2dd3bacf 100644
--- a/src/IceCompiler.cpp
+++ b/src/IceCompiler.cpp
@@ -23,12 +23,16 @@
 #include "IceConverter.h"
 #include "IceELFObjectWriter.h"
 #include "PNaClTranslator.h"
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-parameter"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IRReader/IRReader.h"
 #include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/StreamingMemoryObject.h"
+#pragma clang diagnostic pop
 
 namespace Ice {