VM: Share object pool entries for optimized static calls.

runtime/vm/assembler_arm64.cc

 // Copyright (c) 2014, 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_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 593 matching lines @@
   ldr(TMP, FieldAddress(CODE_REG, Code::entry_point_offset()));
   blr(TMP);
 }
 
 
 void Assembler::BranchLinkPatchable(const StubEntry& stub_entry) {
   BranchLink(stub_entry, kPatchable);
 }
 
 
+void Assembler::BranchLinkWithEquivalence(const StubEntry& stub_entry,
+                                          const Object& equivalence) {
+  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);
+  ldr(TMP, FieldAddress(CODE_REG, Code::entry_point_offset()));
+  blr(TMP);
+}
+
+
 void Assembler::AddImmediate(Register dest, Register rn, int64_t imm) {
   Operand op;
   if (imm == 0) {
     if (dest != rn) {
       mov(dest, rn);
     }
     return;
   }
   if (Operand::CanHold(imm, kXRegSizeInBits, &op) == Operand::Immediate) {
     add(dest, rn, op);
@@ skipping 848 matching lines @@
     add(base, array, Operand(index, LSL, shift));
   }
   const OperandSize size = Address::OperandSizeFor(cid);
   ASSERT(Address::CanHoldOffset(offset, Address::Offset, size));
   return Address(base, offset, Address::Offset, size);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64