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// Copyright 2023 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.
#ifndef V8_COMPILER_TURBOSHAFT_BUILTIN_CALL_DESCRIPTORS_H_
#define V8_COMPILER_TURBOSHAFT_BUILTIN_CALL_DESCRIPTORS_H_
#include "src/codegen/callable.h"
#include "src/codegen/interface-descriptors.h"
#include "src/compiler/frame.h"
#include "src/compiler/turboshaft/operations.h"
#include "src/compiler/turboshaft/representations.h"
namespace v8::internal::compiler::turboshaft {
struct BuiltinCallDescriptor {
private:
template <typename Derived>
struct Descriptor {
static const TSCallDescriptor* Create(Isolate* isolate, Zone* zone) {
Callable callable = Builtins::CallableFor(isolate, Derived::Function);
auto descriptor = Linkage::GetStubCallDescriptor(
zone, callable.descriptor(),
callable.descriptor().GetStackParameterCount(),
Derived::NeedsFrameState ? CallDescriptor::kNeedsFrameState
: CallDescriptor::kNoFlags,
Derived::Properties);
#ifdef DEBUG
Derived::Verify(descriptor);
#endif // DEBUG
return TSCallDescriptor::Create(descriptor, zone);
}
#ifdef DEBUG
static void Verify(const CallDescriptor* desc) {
using result_t = typename Derived::result_t;
using arguments_t = typename Derived::arguments_t;
if constexpr (std::is_same_v<result_t, void>) {
DCHECK_EQ(desc->ReturnCount(), 0);
} else {
DCHECK_EQ(desc->ReturnCount(), 1);
DCHECK(result_t::allows_representation(
RegisterRepresentation::FromMachineRepresentation(
desc->GetReturnType(0).representation())));
}
DCHECK_EQ(desc->NeedsFrameState(), Derived::NeedsFrameState);
DCHECK_EQ(desc->properties(), Derived::Properties);
DCHECK_EQ(desc->ParameterCount(),
std::tuple_size_v<arguments_t> + Derived::NeedsContext);
DCHECK(VerifyArguments<arguments_t>(desc));
}
template <typename Arguments>
static bool VerifyArguments(const CallDescriptor* desc) {
return VerifyArgumentsImpl<Arguments>(
desc, std::make_index_sequence<std::tuple_size_v<Arguments>>());
}
private:
template <typename Arguments, size_t... Indices>
static bool VerifyArgumentsImpl(const CallDescriptor* desc,
std::index_sequence<Indices...>) {
return (std::tuple_element_t<Indices, Arguments>::allows_representation(
RegisterRepresentation::FromMachineRepresentation(
desc->GetParameterType(Indices).representation())) &&
...);
}
#endif // DEBUG
};
using Boolean = Oddball;
public:
struct StringEqual : public Descriptor<StringEqual> {
static constexpr auto Function = Builtin::kStringEqual;
using arguments_t = std::tuple<V<String>, V<String>, V<WordPtr>>;
using result_t = V<Boolean>;
static constexpr bool NeedsFrameState = false;
static constexpr bool NeedsContext = false;
static constexpr Operator::Properties Properties = Operator::kEliminatable;
};
struct StringFromCodePointAt : public Descriptor<StringFromCodePointAt> {
static constexpr auto Function = Builtin::kStringFromCodePointAt;
using arguments_t = std::tuple<V<String>, V<WordPtr>>;
using result_t = V<String>;
static constexpr bool NeedsFrameState = false;
static constexpr bool NeedsContext = false;
static constexpr Operator::Properties Properties = Operator::kEliminatable;
};
struct StringIndexOf : public Descriptor<StringIndexOf> {
static constexpr auto Function = Builtin::kStringIndexOf;
using arguments_t = std::tuple<V<String>, V<String>, V<Smi>>;
using result_t = V<Smi>;
static constexpr bool NeedsFrameState = false;
static constexpr bool NeedsContext = false;
static constexpr Operator::Properties Properties = Operator::kEliminatable;
};
template <Builtin B>
struct StringComparison : public Descriptor<StringComparison<B>> {
static constexpr auto Function = B;
using arguments_t = std::tuple<V<String>, V<String>>;
using result_t = V<Boolean>;
static constexpr bool NeedsFrameState = false;
static constexpr bool NeedsContext = false;
static constexpr Operator::Properties Properties = Operator::kEliminatable;
};
using StringLessThan = StringComparison<Builtin::kStringLessThan>;
using StringLessThanOrEqual =
StringComparison<Builtin::kStringLessThanOrEqual>;
struct StringSubstring : public Descriptor<StringSubstring> {
static constexpr auto Function = Builtin::kStringSubstring;
using arguments_t = std::tuple<V<String>, V<WordPtr>, V<WordPtr>>;
using result_t = V<String>;
static constexpr bool NeedsFrameState = false;
static constexpr bool NeedsContext = false;
static constexpr Operator::Properties Properties = Operator::kEliminatable;
};
#ifdef V8_INTL_SUPPORT
struct StringToLowerCaseIntl : public Descriptor<StringToLowerCaseIntl> {
static constexpr auto Function = Builtin::kStringToLowerCaseIntl;
using arguments_t = std::tuple<V<String>>;
using result_t = V<String>;
static constexpr bool NeedsFrameState = false;
static constexpr bool NeedsContext = true;
static constexpr Operator::Properties Properties =
Operator::kNoDeopt | Operator::kNoThrow;
};
#endif // V8_INTL_SUPPORT
};
} // namespace v8::internal::compiler::turboshaft
#endif // V8_COMPILER_TURBOSHAFT_BUILTIN_CALL_DESCRIPTORS_H_
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