Allow stubbing of called constant addresses using command line argument.

src/llvm2ice.cpp

Index: src/llvm2ice.cpp
diff --git a/src/llvm2ice.cpp b/src/llvm2ice.cpp
index a98c75d327cf75af67c07711e3c13237f7ec30f1..2f3176500cfd64dd2b98c24e86e4ad00a22ac363 100644
--- a/src/llvm2ice.cpp
+++ b/src/llvm2ice.cpp
@@ -172,6 +172,12 @@ static cl::opt<bool> AllowErrorRecovery(
     cl::desc("Allow error recovery when reading PNaCl bitcode."),
     cl::init(false));
 
+// TODO(kschimpf) Remove once the emitter handles these cases.
+static cl::opt<bool>
+    StubConstantCalls("stub-const-calls",
+                      cl::desc("Stub indirect calls to constants."),
+                      cl::init(false));
+
 static cl::opt<bool> LLVMVerboseErrors(
     "verbose-llvm-parse-errors",
     cl::desc("Print out more descriptive PNaCl bitcode parse errors when "
@@ -313,6 +319,7 @@ int main(int argc, char **argv) {
   Flags.TranslateOnly = TranslateOnly;
   Flags.DisableIRGeneration = DisableIRGeneration;
   Flags.AllowErrorRecovery = AllowErrorRecovery;
+  Flags.StubConstantCalls = StubConstantCalls;
 
   // Force -build-on-read=0 for .ll files.
   const std::string LLSuffix = ".ll";