Uses an object pool on x64

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 78 matching lines @@
         (kFirstLocalSlotFromFp + 1 - compiler->StackSize()) * kWordSize;
     ASSERT(fp_sp_dist <= 0);
     __ movq(RDI, RSP);
     __ subq(RDI, RBP);
     __ cmpq(RDI, Immediate(fp_sp_dist));
     __ j(EQUAL, &done, Assembler::kNearJump);
     __ int3();
     __ Bind(&done);
   }
 #endif
-  __ LeaveFrame();
+  __ LeaveFrame(true);
   __ ret();
 
-  // Generate 8 bytes of NOPs so that the debugger can patch the
+  // Generate 4 bytes of NOPs so that the debugger can patch the
   // return pattern with a call to the debug stub.
   // Note that the nop(8) byte pattern is not recognized by the debugger.
   __ nop(1);
   __ nop(1);
   __ nop(1);
   __ nop(1);
-  __ nop(1);
-  __ nop(1);
-  __ nop(1);
-  __ nop(1);
   compiler->AddCurrentDescriptor(PcDescriptors::kReturn,
                                  Isolate::kNoDeoptId,
                                  token_pos());
 }
 
 
 static Condition NegateCondition(Condition condition) {
   switch (condition) {
     case EQUAL:         return NOT_EQUAL;
     case NOT_EQUAL:     return EQUAL;
@@ skipping 2100 matching lines @@
   return NULL;
 }
 
 
 void CatchBlockEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   __ Bind(compiler->GetJumpLabel(this));
   compiler->AddExceptionHandler(catch_try_index(),
                                 try_index(),
                                 compiler->assembler()->CodeSize(),
                                 catch_handler_types_);
+
+  // Restore the pool pointer.
+  __ LoadPoolPointer();
+
   if (HasParallelMove()) {
     compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
   }
 
   // Restore RSP from RBP as we are coming from a throw and the code for
   // popping arguments has not been run.
   const intptr_t fp_sp_dist =
       (kFirstLocalSlotFromFp + 1 - compiler->StackSize()) * kWordSize;
   ASSERT(fp_sp_dist <= 0);
   __ leaq(RSP, Address(RBP, fp_sp_dist));
@@ skipping 2552 matching lines @@
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64