Add atomic load/store, fetch_add, fence, and is-lock-free lowering.

src/llvm2ice.cpp

 //===- subzero/src/llvm2ice.cpp - Driver for testing ----------------------===//
 //
 //                        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
@@ skipping 581 matching lines @@
       if (Call->getDest() != NULL) {
         report_fatal_error(
             "Return value for intrinsic func w/ void return type.");
       }
     } else {
       if (I->Signature[0] != Call->getDest()->getType()) {
         report_fatal_error("Mismatched return types.");
       }
     }
     if (Call->getNumArgs() + 1 != I->NumTypes) {
-      std::cerr << "Call->getNumArgs() " << (int)Call->getNumArgs()
-                << " I->NumTypes " << (int)I->NumTypes << "\n";
       report_fatal_error("Mismatched # of args.");
     }
     for (size_t i = 1; i < I->NumTypes; ++i) {
       if (Call->getArg(i - 1)->getType() != I->Signature[i]) {
         report_fatal_error("Mismatched argument type.");
       }
     }
   }
 
 private:
@@ skipping 164 matching lines @@
                   << " sec\n";
       }
     }
   }
 
   if (!DisableTranslation && Func)
     Func->getTarget()->emitConstants();
 
   return ExitStatus;
 }