Subzero: Fix g++ warnings.

src/IceCompiler.cpp

 //===- subzero/src/IceCompiler.cpp - Driver for bitcode translation -------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief Defines a driver for translating PNaCl bitcode into native code.
 ///
 /// The driver can either directly parse the binary bitcode file, or use LLVM
 /// routines to parse a textual bitcode file into LLVM IR and then convert LLVM
 /// IR into ICE. In either case, the high-level ICE is then compiled down to
 /// native code, as either an ELF object file or a textual asm file.
 ///
 //===----------------------------------------------------------------------===//
 
 #include "IceCompiler.h"
 
 #include "IceBuildDefs.h"
 #include "IceCfg.h"
 #include "IceClFlags.h"
 #include "IceClFlagsExtra.h"
 #include "IceConverter.h"
 #include "IceELFObjectWriter.h"
 #include "PNaClTranslator.h"
 
+#ifdef __clang__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-parameter"
+#endif // __clang__
+
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Bitcode/NaCl/NaClReaderWriter.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"
 
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif // __clang__
+
 #include <regex>
 
-#pragma clang diagnostic pop
-
 namespace Ice {
 
 namespace {
 
 struct {
   const char *FlagName;
   bool FlagValue;
 } ConditionalBuildAttributes[] = {
     {"dump", BuildDefs::dump()},
     {"llvm_cl", BuildDefs::llvmCl()},
@@ skipping 108 matching lines @@
 
   if (Ctx.getFlags().getTimeEachFunction()) {
     constexpr bool DumpCumulative = false;
     Ctx.dumpTimers(GlobalContext::TSK_Funcs, DumpCumulative);
   }
   constexpr bool FinalStats = true;
   Ctx.dumpStats("_FINAL_", FinalStats);
 }
 
 } // end of namespace Ice