[compiler] Delay allocation of code-embedded heap numbers.

src/x64/macro-assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/bootstrapper.h"
@@ skipping 2483 matching lines @@
   JumpIfNotUniqueNameHelper<Register>(this, reg, not_unique_name, distance);
 }
 
 
 void MacroAssembler::Move(Register dst, Register src) {
   if (!dst.is(src)) {
     movp(dst, src);
   }
 }
 
+void MacroAssembler::MoveNumber(Register dst, double value) {
+  int32_t smi;
+  if (DoubleToSmiInteger(value, &smi)) {
+    Move(dst, Smi::FromInt(smi));
+  } else {
+    movp_heap_number(dst, value);
+  }
+}
 
 void MacroAssembler::Move(Register dst, Handle<Object> source) {
   AllowDeferredHandleDereference smi_check;
   if (source->IsSmi()) {
     Move(dst, Smi::cast(*source));
   } else {
     MoveHeapObject(dst, source);
   }
 }
 
@@ skipping 2525 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64