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// Copyright 2021 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/fast-api-calls.h"
namespace v8 {
namespace internal {
namespace compiler {
namespace fast_api_call {
ElementsKind GetTypedArrayElementsKind(CTypeInfo::Type type) {
switch (type) {
case CTypeInfo::Type::kInt32:
return INT32_ELEMENTS;
case CTypeInfo::Type::kUint32:
return UINT32_ELEMENTS;
case CTypeInfo::Type::kInt64:
return BIGINT64_ELEMENTS;
case CTypeInfo::Type::kUint64:
return BIGUINT64_ELEMENTS;
case CTypeInfo::Type::kFloat32:
return FLOAT32_ELEMENTS;
case CTypeInfo::Type::kFloat64:
return FLOAT64_ELEMENTS;
case CTypeInfo::Type::kVoid:
case CTypeInfo::Type::kBool:
case CTypeInfo::Type::kV8Value:
case CTypeInfo::Type::kApiObject:
UNREACHABLE();
}
}
OverloadsResolutionResult ResolveOverloads(
Zone* zone, const FastApiCallFunctionVector& candidates,
unsigned int arg_count) {
DCHECK_GT(arg_count, 0);
static constexpr int kReceiver = 1;
// Only the case of the overload resolution of two functions, one with a
// JSArray param and the other with a typed array param is currently
// supported.
DCHECK_EQ(candidates.size(), 2);
for (unsigned int arg_index = 0; arg_index < arg_count - kReceiver;
arg_index++) {
int index_of_func_with_js_array_arg = -1;
int index_of_func_with_typed_array_arg = -1;
CTypeInfo::Type element_type = CTypeInfo::Type::kVoid;
for (size_t i = 0; i < candidates.size(); i++) {
const CTypeInfo& type_info =
candidates[i].signature->ArgumentInfo(arg_index + kReceiver);
CTypeInfo::SequenceType sequence_type = type_info.GetSequenceType();
if (sequence_type == CTypeInfo::SequenceType::kIsSequence) {
DCHECK_LT(index_of_func_with_js_array_arg, 0);
index_of_func_with_js_array_arg = static_cast<int>(i);
} else if (sequence_type == CTypeInfo::SequenceType::kIsTypedArray) {
DCHECK_LT(index_of_func_with_typed_array_arg, 0);
index_of_func_with_typed_array_arg = static_cast<int>(i);
element_type = type_info.GetType();
} else {
DCHECK_LT(index_of_func_with_js_array_arg, 0);
DCHECK_LT(index_of_func_with_typed_array_arg, 0);
}
}
if (index_of_func_with_js_array_arg >= 0 &&
index_of_func_with_typed_array_arg >= 0) {
return {static_cast<int>(arg_index), element_type};
}
}
// No overload found with a JSArray and a typed array as i-th argument.
return OverloadsResolutionResult::Invalid();
}
} // namespace fast_api_call
} // namespace compiler
} // namespace internal
} // namespace v8
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