Subzero. Native 64-bit int arithmetic on x86-64.

crosstest/test_strengthreduce_main.cpp

 //===- subzero/crosstest/test_strengthreduce_main.cpp - Driver for tests --===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Driver for crosstesting arithmetic strength-reducing optimizations.
 //
 //===----------------------------------------------------------------------===//
 
 /* crosstest.py --test=test_strengthreduce.cpp \
    --driver=test_strengthreduce_main.cpp \
    --prefix=Subzero_ --clang-opt=0 --output=test_strengthreduce */
 
 #include <iostream>
 
 // Include test_strengthreduce.h twice - once normally, and once
 // within the Subzero_ namespace, corresponding to the llc and Subzero
 // translated object files, respectively.
 #include "test_strengthreduce.h"
 namespace Subzero_ {
 #include "test_strengthreduce.h"
 }
 
-int main(int argc, char **argv) {
+#ifdef X8664_STACK_HACK
+extern "C" int wrapped_main(int argc, char *argv[]) {
+#else  // !defined(X8664_STACK_HACK)
+int main(int argc, char *argv[]) {
+#endif // X8664_STACK_HACK
   size_t TotalTests = 0;
   size_t Passes = 0;
   size_t Failures = 0;
   static int32_t Values[] = {-100, -50, 0, 1, 8, 123, 0x33333333, 0x77777777};
   for (size_t i = 0; i < sizeof(Values) / sizeof(*Values); ++i) {
     int32_t SVal = Values[i];
     int32_t ResultLlcS, ResultSzS;
     uint32_t UVal = (uint32_t)Values[i];
     int32_t ResultLlcU, ResultSzU;
 
@@ skipping 17 matching lines @@
               << "): sz=" << ResultSzU << " llc=" << ResultLlcU << "\n";       \
   }
     CONST_TABLE
 #undef X
   }
 
   std::cout << "TotalTests=" << TotalTests << " Passes=" << Passes
             << " Failures=" << Failures << "\n";
   return Failures;
 }