Start adding an integrated assembler.

src/PNaClTranslator.cpp

Index: src/PNaClTranslator.cpp
diff --git a/src/PNaClTranslator.cpp b/src/PNaClTranslator.cpp
index fcebeac05538052584630d7a32fc0c0ae8f9eb09..1a6ffe6c2b76f0ab9f231471bbe2081c6f26da66 100644
--- a/src/PNaClTranslator.cpp
+++ b/src/PNaClTranslator.cpp
@@ -1758,8 +1758,11 @@ void ConstantsParser::ProcessRecord() {
     if (IntegerType *IType = dyn_cast<IntegerType>(
             Context->convertToLLVMType(NextConstantType))) {
       APInt Value(IType->getBitWidth(), NaClDecodeSignRotatedValue(Values[0]));
-      Ice::Constant *C =
-          getContext()->getConstantInt(NextConstantType, Value.getSExtValue());
+      Ice::Constant *C = (NextConstantType == Ice::IceType_i64)
+                             ? getContext()->getConstantInt64(
+                                   NextConstantType, Value.getSExtValue())
+                             : getContext()->getConstantInt32(
+                                   NextConstantType, Value.getSExtValue());
       FuncParser->setNextConstantID(C);
       return;
     }