lli: Add stub -use-mcjit option, which doesn't currently do anything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119508 91177308-0d34-0410-b5e6-96231b3b80d8

tools/lli/lli.cpp

@@ -55,6 +55,10 @@ namespace {
                                  cl::desc("Force interpretation: disable JIT"),
                                  cl::init(false));
 
+  cl::opt<bool> UseMCJIT(
+    "use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"),
+    cl::init(false));
+
   // Determine optimization level.
   cl::opt<char>
   OptLevel("O",
@@ -167,6 +171,10 @@ int main(int argc, char **argv, char * const *envp) {
   if (!TargetTriple.empty())
     Mod->setTargetTriple(Triple::normalize(TargetTriple));
 
+  // Enable MCJIT, if desired.
+  if (UseMCJIT)
+    builder.setUseMCJIT(true);
+
   CodeGenOpt::Level OLvl = CodeGenOpt::Default;
   switch (OptLevel) {
   default: