Remove Emscripten support

tools/opt/opt.cpp

 //===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Optimizations may be specified an arbitrary number of times on the command
@@ skipping 424 matching lines @@
   initializeRewritePNaClLibraryCallsPass(Registry);
   initializeSandboxIndirectCallsPass(Registry);
   initializeSandboxMemoryAccessesPass(Registry);
   initializeSimplifyAllocasPass(Registry);
   initializeSimplifyStructRegSignaturesPass(Registry);
   initializeStripAttributesPass(Registry);
   initializeStripMetadataPass(Registry);
   initializeStripModuleFlagsPass(Registry);
   initializeStripTlsPass(Registry);
   initializeSubstituteUndefsPass(Registry);
-  // Emscripten passes:
-  initializeExpandI64Pass(Registry);
-  initializeExpandInsertExtractElementPass(Registry);
-  initializeLowerEmAsyncifyPass(Registry);
-  initializeLowerEmExceptionsPass(Registry);
-  initializeLowerEmSetjmpPass(Registry);
-  initializeNoExitRuntimePass(Registry);
-  // Emscripten passes end.
   // @LOCALMOD-END
 
   cl::ParseCommandLineOptions(argc, argv,
     "llvm .bc -> .bc modular optimizer and analysis printer\n");
 
   if (AnalyzeOnly && NoOutput) {
     errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
     return 1;
   }
 
@@ skipping 291 matching lines @@
 
   // Now that we have all of the passes ready, run them.
   Passes.run(*M);
 
   // Declare success.
   if (!NoOutput || PrintBreakpoints)
     Out->keep();
 
   return 0;
 }