[Interpreter] Refactor bytecode generator test suite.

test/cctest/interpreter/bytecode_expectations/ConstVariableContextSlot.golden

Index: test/cctest/interpreter/bytecode_expectations/ConstVariableContextSlot.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/ConstVariableContextSlot.golden b/test/cctest/interpreter/bytecode_expectations/ConstVariableContextSlot.golden
new file mode 100644
index 0000000000000000000000000000000000000000..4f1af1acf7b025008a7fe5495b6e829f258fef14
--- /dev/null
+++ b/test/cctest/interpreter/bytecode_expectations/ConstVariableContextSlot.golden
@@ -0,0 +1,139 @@
+#
+# Autogenerated by generate-bytecode-expectations
+#
+
+---
+pool type: mixed
+execute: yes
+wrap: yes
+
+---
+snippet: "
+  const x = 10; function f1() {return x;}
+"
+frame size: 2
+parameter count: 1
+bytecode array length: 24
+bytecodes: [
+  B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
+  B(PushContext), R(1),
+  B(LdaTheHole),
+  B(StaContextSlot), R(context), U8(4),
+  B(CreateClosure), U8(0), U8(0),
+  B(Star), R(0),
+  B(StackCheck),
+  B(LdaSmi8), U8(10),
+  B(StaContextSlot), R(context), U8(4),
+  B(LdaUndefined),
+  B(Return),
+]
+constant pool: [
+  InstanceType::SHARED_FUNCTION_INFO_TYPE,
+]
+handlers: [
+]
+
+---
+snippet: "
+  const x = 10; function f1() {return x;} return x;
+"
+frame size: 3
+parameter count: 1
+bytecode array length: 37
+bytecodes: [
+  B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
+  B(PushContext), R(1),
+  B(LdaTheHole),
+  B(StaContextSlot), R(context), U8(4),
+  B(CreateClosure), U8(0), U8(0),
+  B(Star), R(0),
+  B(StackCheck),
+  B(LdaSmi8), U8(10),
+  B(StaContextSlot), R(context), U8(4),
+  B(LdaContextSlot), R(context), U8(4),
+  B(JumpIfNotHole), U8(11),
+  B(LdaConstant), U8(1),
+  B(Star), R(2),
+  B(CallRuntime), U16(Runtime::kThrowReferenceError), R(2), U8(1),
+  B(Return),
+]
+constant pool: [
+  InstanceType::SHARED_FUNCTION_INFO_TYPE,
+  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
+]
+handlers: [
+]
+
+---
+snippet: "
+  const x = (x = 20); function f1() {return x;}
+"
+frame size: 4
+parameter count: 1
+bytecode array length: 50
+bytecodes: [
+  B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
+  B(PushContext), R(1),
+  B(LdaTheHole),
+  B(StaContextSlot), R(context), U8(4),
+  B(CreateClosure), U8(0), U8(0),
+  B(Star), R(0),
+  B(StackCheck),
+  B(LdaSmi8), U8(20),
+  B(Star), R(2),
+  B(LdaContextSlot), R(context), U8(4),
+  B(JumpIfNotHole), U8(11),
+  B(LdaConstant), U8(1),
+  B(Star), R(3),
+  B(CallRuntime), U16(Runtime::kThrowReferenceError), R(3), U8(1),
+  B(CallRuntime), U16(Runtime::kThrowConstAssignError), R(0), U8(0),
+  B(Ldar), R(2),
+  B(StaContextSlot), R(context), U8(4),
+  B(StaContextSlot), R(context), U8(4),
+  B(LdaUndefined),
+  B(Return),
+]
+constant pool: [
+  InstanceType::SHARED_FUNCTION_INFO_TYPE,
+  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
+]
+handlers: [
+]
+
+---
+snippet: "
+  const x = 10; x = 20; function f1() {return x;}
+"
+frame size: 4
+parameter count: 1
+bytecode array length: 52
+bytecodes: [
+  B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
+  B(PushContext), R(1),
+  B(LdaTheHole),
+  B(StaContextSlot), R(context), U8(4),
+  B(CreateClosure), U8(0), U8(0),
+  B(Star), R(0),
+  B(StackCheck),
+  B(LdaSmi8), U8(10),
+  B(StaContextSlot), R(context), U8(4),
+  B(LdaSmi8), U8(20),
+  B(Star), R(2),
+  B(LdaContextSlot), R(context), U8(4),
+  B(JumpIfNotHole), U8(11),
+  B(LdaConstant), U8(1),
+  B(Star), R(3),
+  B(CallRuntime), U16(Runtime::kThrowReferenceError), R(3), U8(1),
+  B(CallRuntime), U16(Runtime::kThrowConstAssignError), R(0), U8(0),
+  B(Ldar), R(2),
+  B(StaContextSlot), R(context), U8(4),
+  B(LdaUndefined),
+  B(Return),
+]
+constant pool: [
+  InstanceType::SHARED_FUNCTION_INFO_TYPE,
+  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
+]
+handlers: [
+]
+