Bug 1353358 - Support JSOP_OPTIMIZE_SPREADCALL in Ion r=jandem

MozReview-Commit-ID: H3iyhI0Ca2u

--HG--
extra : rebase_source : 9227e64957a1ef1d0cfc259c4f2023bb9464c7ba

js/src/jit/IonBuilder.cpp

@@ -2322,6 +2322,16 @@ IonBuilder::inspectOpcode(JSOp op)
         pushConstant(MagicValue(JS_IS_CONSTRUCTING));
         return Ok();
 
+      case JSOP_OPTIMIZE_SPREADCALL:
+      {
+        // Assuming optimization isn't available doesn't affect correctness.
+        // TODO: Investigate dynamic checks.
+        MDefinition* arr = current->peek(-1);
+        arr->setImplicitlyUsedUnchecked();
+        pushConstant(BooleanValue(false));
+        return Ok();
+      }
+
       default:
         break;
     }

js/src/jit/IonControlFlow.cpp

@@ -336,7 +336,6 @@ ControlFlowGenerator::snoopControlFlow(JSOp op)
       case JSOP_TRY:
         return processTry();
 
-      case JSOP_OPTIMIZE_SPREADCALL:
       case JSOP_THROWMSG:
         // Not implemented yet.
         return ControlStatus::Abort;