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

src/compiler/ia32/code-generator-ia32.cc

 // Copyright 2013 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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 56 matching lines @@
     Constant constant = ToConstant(operand);
     if (constant.type() == Constant::kInt32 &&
         RelocInfo::IsWasmReference(constant.rmode())) {
       return Immediate(reinterpret_cast<Address>(constant.ToInt32()),
                        constant.rmode());
     }
     switch (constant.type()) {
       case Constant::kInt32:
         return Immediate(constant.ToInt32());
       case Constant::kFloat32:
-        return Immediate(
-            isolate()->factory()->NewNumber(constant.ToFloat32(), TENURED));
+        return Immediate::EmbeddedNumber(constant.ToFloat32());
       case Constant::kFloat64:
-        return Immediate(
-            isolate()->factory()->NewNumber(constant.ToFloat64(), TENURED));
+        return Immediate::EmbeddedNumber(constant.ToFloat64());
       case Constant::kExternalReference:
         return Immediate(constant.ToExternalReference());
       case Constant::kHeapObject:
         return Immediate(constant.ToHeapObject());
       case Constant::kInt64:
         break;
       case Constant::kRpoNumber:
         return Immediate::CodeRelativeOffset(ToLabel(operand));
     }
     UNREACHABLE();
@@ skipping 2680 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8