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

test/cctest/test-run-wasm-relocation-x64.cc

 // Copyright 2015 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 <stdlib.h>
 
 #include "src/v8.h"
 
 #include "src/debug/debug.h"
 #include "src/disasm.h"
@@ skipping 19 matching lines @@
   v8::internal::byte buffer[4096];
   Assembler assm(isolate, buffer, sizeof buffer);
   DummyStaticFunction(NULL);
   int64_t imm = 1234567;
 
   __ movq(rax, imm, RelocInfo::WASM_MEMORY_REFERENCE);
   __ nop();
   __ ret(0);
 
   CodeDesc desc;
-  assm.GetCode(&desc);
+  assm.GetCode(isolate, &desc);
   Handle<Code> code = isolate->factory()->NewCode(
       desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
   USE(code);
 
   CSignature0<int64_t> csig;
   CodeRunner<int64_t> runnable(isolate, code, &csig);
   int64_t ret_value = runnable.Call();
   CHECK_EQ(ret_value, imm);
 
 #ifdef OBJECT_PRINT
@@ skipping 38 matching lines @@
 
   __ movl(rax, Immediate(size, RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
   __ cmpl(rax, Immediate(size, RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
   __ j(not_equal, &fail);
   __ ret(0);
   __ bind(&fail);
   __ movl(rax, Immediate(0xdeadbeef));
   __ ret(0);
 
   CodeDesc desc;
-  assm.GetCode(&desc);
+  assm.GetCode(isolate, &desc);
   Handle<Code> code = isolate->factory()->NewCode(
       desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
   USE(code);
 
   CSignature0<int64_t> csig;
   CodeRunner<int64_t> runnable(isolate, code, &csig);
   int64_t ret_value = runnable.Call();
   CHECK_NE(ret_value, bit_cast<uint32_t>(0xdeadbeef));
 
 #ifdef OBJECT_PRINT
@@ skipping 17 matching lines @@
   CHECK_NE(ret_value, bit_cast<uint32_t>(0xdeadbeef));
 
 #ifdef OBJECT_PRINT
   code->Print(os);
   begin = code->instruction_start();
   end = begin + code->instruction_size();
   disasm::Disassembler::Disassemble(stdout, begin, end);
 #endif
 }
 #undef __