Use object pool for runtime calls.

runtime/vm/assembler_mips.h

 // 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.
 
 #ifndef VM_ASSEMBLER_MIPS_H_
 #define VM_ASSEMBLER_MIPS_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_mips.h directly; use assembler.h instead.
 #endif
@@ skipping 269 matching lines @@
   void set_use_far_branches(bool b) {
     ASSERT(buffer_.Size() == 0);
     use_far_branches_ = b;
   }
 
   void EnterFrame();
   void LeaveFrameAndReturn();
 
   // Set up a stub frame so that the stack traversal code can easily identify
   // a stub frame.
-  void EnterStubFrame(bool load_pp = false);
+  void EnterStubFrame();
   void LeaveStubFrame();
   // A separate macro for when a Ret immediately follows, so that we can use
   // the branch delay slot.
   void LeaveStubFrameAndReturn(Register ra = RA);
 
   // Instruction pattern from entrypoint is used in dart frame prologs
   // to set up the frame and save a PC which can be used to figure out the
   // RawInstruction object corresponding to the code running in the frame.
   // See EnterDartFrame. There are 6 instructions before we know the PC.
   static const intptr_t kEntryPointToPcMarkerOffset = 6 * Instr::kInstrSize;
@@ skipping 618 matching lines @@
     jr(T9);
     delay_slot_available_ = false;  // CodePatcher expects a nop.
   }
 
   void BranchLink(const ExternalLabel* label) {
     ASSERT(!in_delay_slot_);
     LoadImmediate(T9, label->address());
     jalr(T9);
   }
 
-  void BranchLinkPatchable(const ExternalLabel* label) {
+  void BranchLink(const ExternalLabel* label, Patchability patchable) {
     ASSERT(!in_delay_slot_);
     const int32_t offset = ObjectPool::element_offset(
-        object_pool_wrapper_.FindExternalLabel(label, kPatchable));
+        object_pool_wrapper_.FindExternalLabel(label, patchable));
     LoadWordFromPoolOffset(T9, offset - kHeapObjectTag);
     jalr(T9);
-    delay_slot_available_ = false;  // CodePatcher expects a nop.
+    if (patchable == kPatchable) {
+      delay_slot_available_ = false;  // CodePatcher expects a nop.
+    }
+  }
+
+  void BranchLinkPatchable(const ExternalLabel* label) {
+    BranchLink(label, kPatchable);
   }
 
   void Drop(intptr_t stack_elements) {
     ASSERT(stack_elements >= 0);
     if (stack_elements > 0) {
       addiu(SP, SP, Immediate(stack_elements * kWordSize));
     }
   }
 
   void LoadPoolPointer() {
@@ skipping 580 matching lines @@
   void ReserveAlignedFrameSpace(intptr_t frame_space);
 
   // Create a frame for calling into runtime that preserves all volatile
   // registers.  Frame's SP is guaranteed to be correctly aligned and
   // frame_space bytes are reserved under it.
   void EnterCallRuntimeFrame(intptr_t frame_space);
   void LeaveCallRuntimeFrame();
 
   void LoadWordFromPoolOffset(Register rd, int32_t offset);
   void LoadObject(Register rd, const Object& object);
+  void LoadExternalLabel(Register rd,
+                         const ExternalLabel* label,
+                         Patchability patchable);
   void PushObject(const Object& object);
 
   void LoadIsolate(Register result);
 
   void LoadClassId(Register result, Register object);
   void LoadClassById(Register result, Register class_id);
   void LoadClass(Register result, Register object);
   void LoadTaggedClassIdMayBeSmi(Register result, Register object);
 
   void ComputeRange(Register result,
@@ skipping 194 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_