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

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 2e478dc85c2bfd26f1a156b2c3a99ae2269dcc9b..d0a0dabf9e4a8c8c4160ce8b2537c3c4c9623c6f 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -830,6 +830,9 @@ class MacroAssembler: public Assembler {
   void Cmp(const Operand& dst, Smi* src);
   void Push(Handle<Object> source);
 
+  // Move a Smi or HeapNumber.
+  void MoveNumber(Register dst, double value);
+
   // Load a heap object and handle the case of new-space objects by
   // indirecting via a global cell.
   void MoveHeapObject(Register result, Handle<Object> object);