[wasm] separate snapshot-able stages

src/compiler/wasm-compiler.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 "src/compiler/wasm-compiler.h"
 
 #include "src/isolate-inl.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/base/platform/platform.h"
@@ skipping 1890 matching lines @@
 
   *effect_ = call;
   return call;
 }
 
 Node* WasmGraphBuilder::CallDirect(uint32_t index, Node** args,
                                    wasm::WasmCodePosition position) {
   DCHECK_NULL(args[0]);
 
   // Add code object as constant.
-  args[0] = HeapConstant(module_->GetFunctionCode(index));
+  args[0] = HeapConstant(module_->GetCodeOrPlaceholder(index));
   wasm::FunctionSig* sig = module_->GetFunctionSignature(index);
 
   return BuildWasmCall(sig, args, position);
 }
 
 Node* WasmGraphBuilder::CallImport(uint32_t index, Node** args,
                                    wasm::WasmCodePosition position) {
   DCHECK_NULL(args[0]);
 
   // Add code object as constant.
@@ skipping 1363 matching lines @@
   }
   if (job_->GenerateCode() != CompilationJob::SUCCEEDED) {
     return Handle<Code>::null();
   }
   base::ElapsedTimer compile_timer;
   if (FLAG_trace_wasm_decode_time) {
     compile_timer.Start();
   }
   Handle<Code> code = info_.code();
   DCHECK(!code.is_null());
-  DCHECK(code->deoptimization_data() == nullptr ||
-         code->deoptimization_data()->length() == 0);
-  Handle<FixedArray> deopt_data =
-      isolate_->factory()->NewFixedArray(2, TENURED);
-  if (!module_env_->instance->js_object.is_null()) {
-    deopt_data->set(0, *module_env_->instance->js_object);
-  }
-  deopt_data->set(1, Smi::FromInt(function_->func_index));
-  deopt_data->set_length(2);
-  code->set_deoptimization_data(*deopt_data);
 
   RecordFunctionCompilation(
       Logger::FUNCTION_TAG, &info_, "WASM_function", function_->func_index,
       module_env_->module->GetName(function_->name_offset,
                                    function_->name_length));
 
   if (FLAG_trace_wasm_decode_time) {
     double compile_ms = compile_timer.Elapsed().InMillisecondsF();
     PrintF("wasm-code-generation ok: %d bytes, %0.3f ms code generation\n",
            static_cast<int>(function_->code_end_offset -
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8