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

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 0c5238b64a65bcb6fd34290eb42db1e55c75c27c..77423a600c428661e61c02fb801427ad90e1ea2a 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -83,10 +83,6 @@ class Arm64OperandConverter final : public InstructionOperandConverter {
     return InputRegister64(index);
   }
 
-  Operand InputImmediate(size_t index) {
-    return ToImmediate(instr_->InputAt(index));
-  }
-
   Operand InputOperand(size_t index) {
     return ToOperand(instr_->InputAt(index));
   }
@@ -225,11 +221,9 @@ class Arm64OperandConverter final : public InstructionOperandConverter {
           return Operand(constant.ToInt64());
         }
       case Constant::kFloat32:
-        return Operand(
-            isolate()->factory()->NewNumber(constant.ToFloat32(), TENURED));
+        return Operand(Operand::EmbeddedNumber(constant.ToFloat32()));
       case Constant::kFloat64:
-        return Operand(
-            isolate()->factory()->NewNumber(constant.ToFloat64(), TENURED));
+        return Operand(Operand::EmbeddedNumber(constant.ToFloat64()));
       case Constant::kExternalReference:
         return Operand(constant.ToExternalReference());
       case Constant::kHeapObject: