VM: Share object pool entries for optimized static calls.

runtime/vm/assembler_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"  // NOLINT
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
@@ skipping 79 matching lines @@
   intptr_t call_start = buffer_.GetPosition();
   const int32_t offset = ObjectPool::element_offset(
       object_pool_wrapper_.FindObject(target, kPatchable));
   LoadWordFromPoolOffset(CODE_REG, offset - kHeapObjectTag);
   movq(TMP, FieldAddress(CODE_REG, Code::entry_point_offset()));
   call(TMP);
   ASSERT((buffer_.GetPosition() - call_start) == kCallExternalLabelSize);
 }
 
 
+void Assembler::CallWithEquivalence(const StubEntry& stub_entry,
+                                    const Object& equivalence) {
+  ASSERT(constant_pool_allowed());
+  const Code& target = Code::Handle(stub_entry.code());
+  const int32_t offset = ObjectPool::element_offset(
+      object_pool_wrapper_.FindObject(target, equivalence));
+  LoadWordFromPoolOffset(CODE_REG, offset - kHeapObjectTag);
+  movq(TMP, FieldAddress(CODE_REG, Code::entry_point_offset()));
+  call(TMP);
+}
+
+
 void Assembler::Call(const StubEntry& stub_entry) {
   ASSERT(constant_pool_allowed());
   const Code& target = Code::Handle(stub_entry.code());
   const int32_t offset = ObjectPool::element_offset(
       object_pool_wrapper_.FindObject(target, kNotPatchable));
   LoadWordFromPoolOffset(CODE_REG, offset - kHeapObjectTag);
   movq(TMP, FieldAddress(CODE_REG, Code::entry_point_offset()));
   call(TMP);
 }
 
@@ skipping 3816 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64