PNaCl: Add ExpandByVal pass for expanding out by-value struct args and results

include/llvm/Transforms/NaCl.h

 //===-- NaCl.h - NaCl Transformations ---------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_TRANSFORMS_NACL_H
 #define LLVM_TRANSFORMS_NACL_H
 
 namespace llvm {
 
 class BasicBlockPass;
 class FunctionPass;
 class Instruction;
 class ModulePass;
 class Use;
 class Value;
 
+ModulePass *createExpandByValPass();
 FunctionPass *createExpandConstantExprPass();
 ModulePass *createExpandCtorsPass();
 BasicBlockPass *createExpandGetElementPtrPass();
 ModulePass *createExpandTlsPass();
 ModulePass *createExpandTlsConstantExprPass();
 ModulePass *createExpandVarArgsPass();
 ModulePass *createGlobalCleanupPass();
 ModulePass *createResolveAliasesPass();
 ModulePass *createStripMetadataPass();
 
 Instruction *PhiSafeInsertPt(Use *U);
 void PhiSafeReplaceUses(Use *U, Value *NewVal);
 
 }
 
 #endif