Remove support for pretenuring as it is not fully implemented and is currently turned on for a very…

runtime/vm/intrinsifier_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/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 158 matching lines @@
   /* Special case for scaling by 16. */                                        \
   if (scale_factor == TIMES_16) {                                              \
     /* double length of array. */                                              \
     __ addq(RDI, RDI);                                                         \
     /* only scale by 8. */                                                     \
     scale_factor = TIMES_8;                                                    \
   }                                                                            \
   const intptr_t fixed_size = sizeof(Raw##type_name) + kObjectAlignment - 1;   \
   __ leaq(RDI, Address(RDI, scale_factor, fixed_size));                        \
   __ andq(RDI, Immediate(-kObjectAlignment));                                  \
-  Heap::Space space = Heap::SpaceForAllocation(cid);                           \
+  Heap::Space space = Heap::kNew;                                              \
   __ movq(R13, Address(THR, Thread::heap_offset()));                           \
   __ movq(RAX, Address(R13, Heap::TopOffset(space)));                          \
   __ movq(RCX, RAX);                                                           \
                                                                                \
   /* RDI: allocation size. */                                                  \
   __ addq(RCX, RDI);                                                           \
   __ j(CARRY, &fall_through);                                                  \
                                                                                \
   /* Check if the allocation fits into the remaining space. */                 \
   /* RAX: potential new object start. */                                       \
@@ skipping 1641 matching lines @@
     __ movq(RDI, length_reg);
   }
   Label pop_and_fail;
   __ pushq(RDI);  // Preserve length.
   __ SmiUntag(RDI);
   const intptr_t fixed_size = sizeof(RawString) + kObjectAlignment - 1;
   __ leaq(RDI, Address(RDI, TIMES_1, fixed_size));  // RDI is a Smi.
   __ andq(RDI, Immediate(-kObjectAlignment));
 
   const intptr_t cid = kOneByteStringCid;
-  Heap::Space space = Heap::SpaceForAllocation(cid);
+  Heap::Space space = Heap::kNew;
   __ movq(R13, Address(THR, Thread::heap_offset()));
   __ movq(RAX, Address(R13, Heap::TopOffset(space)));
 
   // RDI: allocation size.
   __ movq(RCX, RAX);
   __ addq(RCX, RDI);
   __ j(CARRY,  &pop_and_fail);
 
   // Check if the allocation fits into the remaining space.
   // RAX: potential new object start.
@@ skipping 267 matching lines @@
   __ Bind(&true_label);
   __ LoadObject(RAX, Bool::True());
   __ ret();
 }
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64