Subzero: Change the name llvm2ice to the more appropriate pnacl-sz.

src/main.cpp

-//===- subzero/src/llvm2ice.cpp - Driver for testing ----------------------===//
+//===- subzero/src/main.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.
 //
 //===----------------------------------------------------------------------===//
 //
-// This file defines a driver that uses LLVM capabilities to parse a
-// bitcode file and build the LLVM IR, and then convert the LLVM basic
-// blocks, instructions, and operands into their Subzero equivalents.
+// This file defines a driver for translating PNaCl bitcode into native code.
+// It 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 <fstream>
 #include <iostream>
 
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IRReader/IRReader.h"
 #include "llvm/Support/CommandLine.h"
@@ skipping 386 matching lines @@
   if (SubzeroTimingEnabled)
     Ctx.dumpTimers();
   if (TimeEachFunction) {
     const bool DumpCumulative = false;
     Ctx.dumpTimers(Ice::GlobalContext::TSK_Funcs, DumpCumulative);
   }
   const bool FinalStats = true;
   Ctx.dumpStats("_FINAL_", FinalStats);
   return GetReturnValue(Ctx.getErrorStatus()->value());
 }