Insert denominator zero checks for NaCl

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 568 matching lines @@
   // @LOCALMOD-BEGIN
   initializeExpandByValPass(Registry);
   initializeExpandConstantExprPass(Registry);
   initializeExpandCtorsPass(Registry);
   initializeExpandGetElementPtrPass(Registry);
   initializeExpandTlsPass(Registry);
   initializeExpandTlsConstantExprPass(Registry);
   initializeExpandVarArgsPass(Registry);
   initializeFlattenGlobalsPass(Registry);
   initializeGlobalCleanupPass(Registry);
+  initializeInsertDivideCheckPass(Registry);

[Derek Schuff, 2013/05/06 16:18:49]

we want to add an initialization for this pass in LLC too

[sehr, 2013/05/07 23:53:17]

As we chatted about -- I am inserting a call to create the optimization in the
ARMTargetMachine.

   initializePNaClABIVerifyFunctionsPass(Registry);
   initializePNaClABIVerifyModulePass(Registry);
   initializeResolveAliasesPass(Registry);
   initializeStripMetadataPass(Registry);
   // @LOCALMOD-END
 
   cl::ParseCommandLineOptions(argc, argv,
     "llvm .bc -> .bc modular optimizer and analysis printer\n");
 
   if (AnalyzeOnly && NoOutput) {
@@ skipping 237 matching lines @@
 
   // Now that we have all of the passes ready, run them.
   Passes.run(*M.get());
 
   // Declare success.
   if (!NoOutput || PrintBreakpoints)
     Out->keep();
 
   return 0;
 }