[interpreter] Introduce bytecode generation pipeline.

test/unittests/interpreter/bytecode-writer-unittest.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/v8.h"
+
+#include "src/interpreter/bytecode-register-allocator.h"
+#include "src/interpreter/bytecode-writer.h"
+#include "src/isolate.h"
+#include "test/unittests/test-utils.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+using BytecodeNodeTest = TestWithIsolateAndZone;
+
+TEST(BytecodeSourceInfo, Operations) {
+  BytecodeSourceInfo x(0, true);
+  CHECK_EQ(x.source_position(), 0);
+  CHECK_EQ(x.is_statement(), true);
+  CHECK_EQ(x.is_valid(), true);
+  x.set_invalid();
+  CHECK_EQ(x.is_statement(), false);
+  CHECK_EQ(x.is_valid(), false);
+
+  x.Update({1, true});
+  BytecodeSourceInfo y(1, true);
+  CHECK(x == y);
+  CHECK(!(x != y));
+
+  x.set_invalid();
+  CHECK(!(x == y));
+  CHECK(x != y);
+
+  y.Update({2, false});
+  CHECK_EQ(y.source_position(), 1);
+  CHECK_EQ(y.is_statement(), true);
+
+  y.Update({2, true});
+  CHECK_EQ(y.source_position(), 2);
+  CHECK_EQ(y.is_statement(), true);
+
+  y.set_invalid();
+  y.Update({3, false});
+  CHECK_EQ(y.source_position(), 3);
+  CHECK_EQ(y.is_statement(), false);
+
+  y.Update({3, true});
+  CHECK_EQ(y.source_position(), 3);
+  CHECK_EQ(y.is_statement(), true);
+}
+
+TEST_F(BytecodeNodeTest, Allocation) {
+  BytecodeNodeAllocator node_allocator(zone());
+  BytecodeNode* node = node_allocator.Allocate();
+  CHECK_EQ(node->bytecode(), Bytecode::kIllegal);
+  CHECK(!node->source_info().is_valid());
+  node->set_bytecode(Bytecode::kStackCheck);
+  CHECK_EQ(node->bytecode(), Bytecode::kStackCheck);
+  CHECK_EQ(node->operand_count(), 0);
+  CHECK_EQ(node->operand_scale(), OperandScale::kSingle);
+  CHECK_EQ(node->Size(), 1);
+
+  node->source_info().Update({0, false});
+  CHECK(node->source_info().is_valid());
+  node->Release();
+
+  // Check node is recylced and recycled is invalid.
+  BytecodeNode* other_node = node_allocator.Allocate();
+  CHECK_EQ(other_node, node);
+  CHECK_EQ(other_node->bytecode(), Bytecode::kIllegal);
+  CHECK(!other_node->source_info().is_valid());
+  other_node->Release();
+}
+
+TEST_F(BytecodeNodeTest, BytecodeNodeProperties) {
+  BytecodeNodeAllocator node_allocator(zone());
+  BytecodeNode* node = node_allocator.Allocate();
+  Register first(0), second(1);
+  node->set_bytecode(Bytecode::kForInDone, first.ToOperand(),
+                     second.ToOperand(), OperandScale::kSingle);
+  CHECK_EQ(node->Size(), 3);
+  node->set_bytecode(Bytecode::kForInDone, first.ToOperand(),
+                     second.ToOperand(), OperandScale::kDouble);
+  CHECK_EQ(node->Size(), 6);
+  node->set_bytecode(Bytecode::kForInDone, first.ToOperand(),
+                     second.ToOperand(), OperandScale::kQuadruple);
+  CHECK_EQ(node->Size(), 10);
+  node->set_bytecode(Bytecode::kForInDone, first.ToOperand(),
+                     second.ToOperand(), OperandScale::kQuadruple);
+  CHECK_EQ(node->Size(), 10);
+  node->set_bytecode(Bytecode::kCall, first.ToOperand(), second.ToOperand(), 2,
+                     3, OperandScale::kDouble);
+  CHECK_EQ(node->Size(), 10);
+  CHECK_EQ(node->operands()[0], first.ToOperand());
+  CHECK_EQ(node->operands()[1], second.ToOperand());
+  CHECK_EQ(node->operands()[2], 2);
+  CHECK_EQ(node->operands()[3], 3);
+  CHECK(!node->source_info().is_valid());
+  node->source_info().Update({77, true});
+  CHECK(node->source_info().is_valid());
+  CHECK_EQ(node->source_info().source_position(), 77);
+  CHECK_EQ(node->source_info().is_statement(), true);
+  node->Release();
+}
+
+// TODO(oth): FinalStageBytecodeWriterTest.
+//
+// - Measured frame size is correct.
+// - BytecodeArraySize.
+// - SourcePositionTable iterates as expected.
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8