Support unboxed input to indirect goto instruction.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 6198 matching lines @@
 
 
 void IndirectGotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register offset_reg = locs()->in(0).reg();
   Register target_address_reg = locs()->temp_slot(0)->reg();
 
   // Load from [current frame pointer] + kPcMarkerSlotFromFp.
   __ movq(target_address_reg, Address(RBP, kPcMarkerSlotFromFp * kWordSize));
 
   // Calculate the final absolute address.
-  __ SmiUntag(offset_reg);
+  if (offset()->definition()->representation() == kTagged) {
+    __ SmiUntag(offset_reg);
+  }
   __ addq(target_address_reg, offset_reg);
 
   // Jump to the absolute address.
   __ jmp(target_address_reg);
 }
 
 LocationSummary* StrictCompareInstr::MakeLocationSummary(Isolate* isolate,
                                                          bool opt) const {
   const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
@@ skipping 180 matching lines @@
   __ movq(R10, Immediate(kInvalidObjectPointer));
   __ movq(RBX, Immediate(kInvalidObjectPointer));
 #endif
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64