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

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index 9cb7364ab7968a6da4cf121f19662fb45cba2938..1d9983c33065c25591c060fda9128bbae7ccb1d9 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -3020,12 +3020,10 @@ void CodeGenerator::AssembleMove(InstructionOperand* source,
           }
           break;
         case Constant::kFloat32:
-          __ Move(dst,
-                  isolate()->factory()->NewNumber(src.ToFloat32(), TENURED));
+          __ MoveNumber(dst, src.ToFloat32());
           break;
         case Constant::kFloat64:
-          __ Move(dst,
-                  isolate()->factory()->NewNumber(src.ToFloat64(), TENURED));
+          __ MoveNumber(dst, src.ToFloat64());
           break;
         case Constant::kExternalReference:
           __ Move(dst, src.ToExternalReference());