src/baseline/baseline.cc

// Copyright 2020 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/baseline/baseline.h"

#include "src/handles/maybe-handles.h"
#include "src/objects/shared-function-info-inl.h"

#ifdef V8_ENABLE_SPARKPLUG

#include "src/baseline/baseline-assembler-inl.h"
#include "src/baseline/baseline-compiler.h"
#include "src/debug/debug.h"
#include "src/heap/factory-inl.h"
#include "src/logging/runtime-call-stats-scope.h"
#include "src/objects/script-inl.h"

namespace v8 {
namespace internal {

bool CanCompileWithBaseline(Isolate* isolate,
                            Tagged<SharedFunctionInfo> shared) {
  DisallowGarbageCollection no_gc;

  // Check that baseline compiler is enabled.
  if (!v8_flags.sparkplug) return false;

  // Check that short builtin calls are enabled if needed.
  if (v8_flags.sparkplug_needs_short_builtins &&
      !isolate->is_short_builtin_calls_enabled()) {
    return false;
  }

  // Check if we actually have bytecode.
  if (!shared->HasBytecodeArray()) return false;

  // Do not optimize when debugger needs to hook into every call.
  if (isolate->debug()->needs_check_on_function_call()) return false;

  if (auto debug_info = shared->TryGetDebugInfo(isolate)) {
    // Functions with breakpoints have to stay interpreted.
    if (debug_info.value()->HasBreakInfo()) return false;

    // Functions with instrumented bytecode can't be baseline compiled since the
    // baseline code's bytecode array pointer is immutable.
    if (debug_info.value()->HasInstrumentedBytecodeArray()) return false;
  }

  // Do not baseline compile if function doesn't pass sparkplug_filter.
  if (!shared->PassesFilter(v8_flags.sparkplug_filter)) return false;

  return true;
}

MaybeDirectHandle<Code> GenerateBaselineCode(
    Isolate* isolate, Handle<SharedFunctionInfo> shared) {
  RCS_SCOPE(isolate, RuntimeCallCounterId::kCompileBaseline);
  Handle<BytecodeArray> bytecode(shared->GetBytecodeArray(isolate), isolate);
  LocalIsolate* local_isolate = isolate->main_thread_local_isolate();
  baseline::BaselineCompiler compiler(local_isolate, shared, bytecode);
  compiler.GenerateCode();
  MaybeDirectHandle<Code> code = compiler.Build();
  if (v8_flags.print_code && !code.is_null()) {
    Print(*code.ToHandleChecked());
  }
  return code;
}

void EmitReturnBaseline(MacroAssembler* masm) {
  baseline::BaselineAssembler::EmitReturn(masm);
}

}  // namespace internal
}  // namespace v8

#else

namespace v8 {
namespace internal {

bool CanCompileWithBaseline(Isolate* isolate,
                            Tagged<SharedFunctionInfo> shared) {
  return false;
}

MaybeDirectHandle<Code> GenerateBaselineCode(
    Isolate* isolate, Handle<SharedFunctionInfo> shared) {
  UNREACHABLE();
}

void EmitReturnBaseline(MacroAssembler* masm) { UNREACHABLE(); }

}  // namespace internal
}  // namespace v8

#endif