Removes loads from PP from stubs on arm64.

runtime/vm/assembler_arm64.h

 // 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.
 
 #ifndef VM_ASSEMBLER_ARM64_H_
 #define VM_ASSEMBLER_ARM64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm64.h directly; use assembler.h instead.
 #endif
@@ skipping 663 matching lines @@
   }
 
   // Fixed length branch to label.
   void BranchFixed(const ExternalLabel* label) {
     LoadImmediateFixed(TMP, label->address());
     br(TMP);
   }
 
   void BranchLink(const ExternalLabel* label, Register pp) {
     if (Isolate::Current() == Dart::vm_isolate()) {
-      LoadImmediate(TMP, label->address(), kNoRegister);
+      LoadImmediate(TMP, label->address(), kNoPP);
       blr(TMP);
     } else {
       LoadExternalLabel(TMP, label, kNotPatchable, pp);
       blr(TMP);
     }
   }
 
   void BranchLinkPatchable(const ExternalLabel* label) {
     LoadExternalLabel(TMP, label, kPatchable, PP);
     blr(TMP);
@@ skipping 79 matching lines @@
   void LeaveCallRuntimeFrame();
   void CallRuntime(const RuntimeEntry& entry, intptr_t argument_count);
 
   // Set up a stub frame so that the stack traversal code can easily identify
   // a stub frame.
   void EnterStubFrame(bool load_pp = false);
   void LeaveStubFrame();
 
   void UpdateAllocationStats(intptr_t cid,
                              Register temp_reg,
+                             Register pp,
                              Heap::Space space = Heap::kNew);
 
  private:
   AssemblerBuffer buffer_;  // Contains position independent code.
 
   // Objects and patchable jump targets.
   GrowableObjectArray& object_pool_;
 
   // Patchability of pool entries.
   GrowableArray<Patchability> patchable_pool_entries_;
@@ skipping 320 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM64_H_