[wasm] Remove single function JIT support.

src/runtime/runtime-wasm.cc

 // Copyright 2016 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/assembler.h"
 #include "src/compiler/wasm-compiler.h"
 #include "src/conversions.h"
@@ skipping 91 matching lines @@
 
   // Set new buffer to be wasm memory
   module_object->SetInternalField(kWasmMemArrayBuffer, *buffer);
 
   CHECK(wasm::UpdateWasmModuleMemory(module_object, old_mem_start,
                                      new_mem_start, old_size, new_size));
 
   return *isolate->factory()->NewNumberFromInt(old_size /
                                                wasm::WasmModule::kPageSize);
 }
-
-RUNTIME_FUNCTION(Runtime_JITSingleFunction) {
-  const int fixed_args = 6;
-
-  HandleScope scope(isolate);
-  DCHECK_LE(fixed_args, args.length());
-  CONVERT_SMI_ARG_CHECKED(base, 0);
-  CONVERT_SMI_ARG_CHECKED(length, 1);
-  CONVERT_SMI_ARG_CHECKED(index, 2);
-  CONVERT_ARG_HANDLE_CHECKED(FixedArray, function_table, 3);
-  CONVERT_UINT32_ARG_CHECKED(sig_index, 4);
-  CONVERT_SMI_ARG_CHECKED(return_count, 5);
-
-  Handle<JSObject> module_object;
-
-  {
-    // Get the module JSObject
-    DisallowHeapAllocation no_allocation;
-    const Address entry = Isolate::c_entry_fp(isolate->thread_local_top());
-    Address pc =
-        Memory::Address_at(entry + StandardFrameConstants::kCallerPCOffset);
-    Code* code =
-        isolate->inner_pointer_to_code_cache()->GetCacheEntry(pc)->code;
-    FixedArray* deopt_data = code->deoptimization_data();
-    DCHECK(deopt_data->length() == 2);
-    module_object = Handle<JSObject>::cast(handle(deopt_data->get(0), isolate));
-    CHECK(!module_object->IsNull(isolate));
-  }
-
-  // Get mem buffer associated with module object
-  Handle<Object> obj(module_object->GetInternalField(kWasmMemArrayBuffer),
-                     isolate);
-
-  if (obj->IsUndefined(isolate)) {
-    return isolate->heap()->undefined_value();
-  }
-
-  Handle<JSArrayBuffer> mem_buffer = Handle<JSArrayBuffer>::cast(obj);
-
-  wasm::WasmModule module(reinterpret_cast<byte*>(mem_buffer->backing_store()));
-  wasm::ErrorThrower thrower(isolate, "JITSingleFunction");
-  wasm::ModuleEnv module_env;
-  module_env.module = &module;
-  module_env.instance = nullptr;
-  module_env.origin = wasm::kWasmOrigin;
-
-  uint32_t signature_size = args.length() - fixed_args;
-  wasm::LocalType* sig_types = new wasm::LocalType[signature_size];
-
-  for (uint32_t i = 0; i < signature_size; ++i) {
-    CONVERT_SMI_ARG_CHECKED(sig_type, i + fixed_args);
-    sig_types[i] = static_cast<wasm::LocalType>(sig_type);
-  }
-  wasm::FunctionSig sig(return_count, signature_size - return_count, sig_types);
-
-  wasm::WasmFunction func;
-  func.sig = &sig;
-  func.func_index = index;
-  func.sig_index = sig_index;
-  func.name_offset = 0;
-  func.name_length = 0;
-  func.code_start_offset = base;
-  func.code_end_offset = base + length;
-
-  Handle<Code> code = compiler::WasmCompilationUnit::CompileWasmFunction(
-      &thrower, isolate, &module_env, &func);
-
-  delete[] sig_types;
-  if (thrower.error()) {
-    return isolate->heap()->undefined_value();
-  }
-
-  function_table->set(index, Smi::FromInt(sig_index));
-  function_table->set(index + function_table->length() / 2, *code);
-
-  return isolate->heap()->undefined_value();
-}
 }  // namespace internal
 }  // namespace v8