Merge V8 5.2.361.47 DO NOT MERGE
https://chromium.googlesource.com/v8/v8/+/5.2.361.47
FPIIM-449
Change-Id: Ibec421b85a9b88cb3a432ada642e469fe7e78346
(cherry picked from commit bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8)
diff --git a/src/interpreter/bytecode-array-writer.cc b/src/interpreter/bytecode-array-writer.cc
new file mode 100644
index 0000000..029688e
--- /dev/null
+++ b/src/interpreter/bytecode-array-writer.cc
@@ -0,0 +1,105 @@
+// 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/interpreter/bytecode-array-writer.h"
+
+#include <iomanip>
+#include "src/interpreter/source-position-table.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+BytecodeArrayWriter::BytecodeArrayWriter(
+ Zone* zone, SourcePositionTableBuilder* source_position_table_builder)
+ : bytecodes_(zone),
+ max_register_count_(0),
+ source_position_table_builder_(source_position_table_builder) {}
+
+// override
+BytecodeArrayWriter::~BytecodeArrayWriter() {}
+
+// override
+size_t BytecodeArrayWriter::FlushForOffset() { return bytecodes()->size(); }
+
+// override
+void BytecodeArrayWriter::Write(BytecodeNode* node) {
+ UpdateSourcePositionTable(node);
+ EmitBytecode(node);
+}
+
+void BytecodeArrayWriter::UpdateSourcePositionTable(
+ const BytecodeNode* const node) {
+ int bytecode_offset = static_cast<int>(bytecodes()->size());
+ const BytecodeSourceInfo& source_info = node->source_info();
+ if (source_info.is_valid()) {
+ source_position_table_builder_->AddPosition(bytecode_offset,
+ source_info.source_position(),
+ source_info.is_statement());
+ }
+}
+
+void BytecodeArrayWriter::EmitBytecode(const BytecodeNode* const node) {
+ DCHECK_NE(node->bytecode(), Bytecode::kIllegal);
+
+ OperandScale operand_scale = node->operand_scale();
+ if (operand_scale != OperandScale::kSingle) {
+ Bytecode prefix = Bytecodes::OperandScaleToPrefixBytecode(operand_scale);
+ bytecodes()->push_back(Bytecodes::ToByte(prefix));
+ }
+
+ Bytecode bytecode = node->bytecode();
+ bytecodes()->push_back(Bytecodes::ToByte(bytecode));
+
+ int register_operand_bitmap = Bytecodes::GetRegisterOperandBitmap(bytecode);
+ const uint32_t* const operands = node->operands();
+ const OperandType* operand_types = Bytecodes::GetOperandTypes(bytecode);
+ for (int i = 0; operand_types[i] != OperandType::kNone; ++i) {
+ OperandType operand_type = operand_types[i];
+ switch (Bytecodes::SizeOfOperand(operand_type, operand_scale)) {
+ case OperandSize::kNone:
+ UNREACHABLE();
+ break;
+ case OperandSize::kByte:
+ bytecodes()->push_back(static_cast<uint8_t>(operands[i]));
+ break;
+ case OperandSize::kShort: {
+ uint8_t operand_bytes[2];
+ WriteUnalignedUInt16(operand_bytes, operands[i]);
+ bytecodes()->insert(bytecodes()->end(), operand_bytes,
+ operand_bytes + 2);
+ break;
+ }
+ case OperandSize::kQuad: {
+ uint8_t operand_bytes[4];
+ WriteUnalignedUInt32(operand_bytes, operands[i]);
+ bytecodes()->insert(bytecodes()->end(), operand_bytes,
+ operand_bytes + 4);
+ break;
+ }
+ }
+
+ if ((register_operand_bitmap >> i) & 1) {
+ int count;
+ if (operand_types[i + 1] == OperandType::kRegCount) {
+ count = static_cast<int>(operands[i + 1]);
+ } else {
+ count = Bytecodes::GetNumberOfRegistersRepresentedBy(operand_type);
+ }
+ Register reg = Register::FromOperand(static_cast<int32_t>(operands[i]));
+ max_register_count_ = std::max(max_register_count_, reg.index() + count);
+ }
+ }
+}
+
+// override
+void BytecodeArrayWriter::FlushBasicBlock() {}
+
+int BytecodeArrayWriter::GetMaximumFrameSizeUsed() {
+ return max_register_count_ * kPointerSize;
+}
+
+} // namespace interpreter
+} // namespace internal
+} // namespace v8