private void VisitIncDec(Node node)
{
int incrDecrMask = node.GetExistingIntProp(Node.INCRDECR_PROP);
Node child = node.GetFirstChild();
switch (child.GetType())
{
case Token.GETVAR:
{
if (!hasVarsInRegs)
{
Kit.CodeBug();
}
bool post = ((incrDecrMask & Node.POST_FLAG) != 0);
int varIndex = fnCurrent.GetVarIndex(child);
short reg = varRegisters[varIndex];
if (node.GetIntProp(Node.ISNUMBER_PROP, -1) != -1)
{
int offset = VarIsDirectCallParameter(varIndex) ? 1 : 0;
cfw.AddDLoad(reg + offset);
if (post)
{
cfw.Add(ByteCode.DUP2);
}
cfw.AddPush(1.0);
if ((incrDecrMask & Node.DECR_FLAG) == 0)
{
cfw.Add(ByteCode.DADD);
}
else
{
cfw.Add(ByteCode.DSUB);
}
if (!post)
{
cfw.Add(ByteCode.DUP2);
}
cfw.AddDStore(reg + offset);
}
else
{
if (VarIsDirectCallParameter(varIndex))
{
DcpLoadAsObject(reg);
}
else
{
cfw.AddALoad(reg);
}
if (post)
{
cfw.Add(ByteCode.DUP);
}
AddObjectToDouble();
cfw.AddPush(1.0);
if ((incrDecrMask & Node.DECR_FLAG) == 0)
{
cfw.Add(ByteCode.DADD);
}
else
{
cfw.Add(ByteCode.DSUB);
}
AddDoubleWrap();
if (!post)
{
cfw.Add(ByteCode.DUP);
}
cfw.AddAStore(reg);
break;
}
break;
}
case Token.NAME:
{
cfw.AddALoad(variableObjectLocal);
cfw.AddPush(child.GetString());
// push name
cfw.AddALoad(contextLocal);
cfw.AddPush(incrDecrMask);
AddScriptRuntimeInvoke("nameIncrDecr", "(Lorg/mozilla/javascript/Scriptable;" + "Ljava/lang/String;" + "Lorg/mozilla/javascript/Context;" + "I)Ljava/lang/Object;");
break;
}
case Token.GETPROPNOWARN:
{
throw Kit.CodeBug();
}
case Token.GETPROP:
{
Node getPropChild = child.GetFirstChild();
GenerateExpression(getPropChild, node);
GenerateExpression(getPropChild.GetNext(), node);
cfw.AddALoad(contextLocal);
cfw.AddPush(incrDecrMask);
AddScriptRuntimeInvoke("propIncrDecr", "(Ljava/lang/Object;" + "Ljava/lang/String;" + "Lorg/mozilla/javascript/Context;" + "I)Ljava/lang/Object;");
break;
}
case Token.GETELEM:
{
Node elemChild = child.GetFirstChild();
GenerateExpression(elemChild, node);
GenerateExpression(elemChild.GetNext(), node);
cfw.AddALoad(contextLocal);
cfw.AddPush(incrDecrMask);
if (elemChild.GetNext().GetIntProp(Node.ISNUMBER_PROP, -1) != -1)
{
AddOptRuntimeInvoke("elemIncrDecr", "(Ljava/lang/Object;" + "D" + "Lorg/mozilla/javascript/Context;" + "I" + ")Ljava/lang/Object;");
}
else
{
AddScriptRuntimeInvoke("elemIncrDecr", "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "I" + ")Ljava/lang/Object;");
}
break;
}
case Token.GET_REF:
{
Node refChild = child.GetFirstChild();
GenerateExpression(refChild, node);
cfw.AddALoad(contextLocal);
cfw.AddPush(incrDecrMask);
AddScriptRuntimeInvoke("refIncrDecr", "(Lorg/mozilla/javascript/Ref;" + "Lorg/mozilla/javascript/Context;" + "I)Ljava/lang/Object;");
break;
}
default:
{
Codegen.BadTree();
break;
}
}
}
private void GenerateExpression(Node node, Node parent)
{
int type = node.GetType();
Node child = node.GetFirstChild();
switch (type)
{
case Token.USE_STACK:
{
break;
}
case Token.FUNCTION:
{
if (fnCurrent != null || parent.GetType() != Token.SCRIPT)
{
int fnIndex = node.GetExistingIntProp(Node.FUNCTION_PROP);
OptFunctionNode ofn = OptFunctionNode.Get(scriptOrFn, fnIndex);
int t = ofn.fnode.GetFunctionType();
if (t != FunctionNode.FUNCTION_EXPRESSION)
{
throw Codegen.BadTree();
}
VisitFunction(ofn, t);
}
break;
}
case Token.NAME:
{
cfw.AddALoad(contextLocal);
cfw.AddALoad(variableObjectLocal);
cfw.AddPush(node.GetString());
AddScriptRuntimeInvoke("name", "(Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "Ljava/lang/String;" + ")Ljava/lang/Object;");
break;
}
case Token.CALL:
case Token.NEW:
{
int specialType = node.GetIntProp(Node.SPECIALCALL_PROP, Node.NON_SPECIALCALL);
if (specialType == Node.NON_SPECIALCALL)
{
OptFunctionNode target;
target = (OptFunctionNode)node.GetProp(Node.DIRECTCALL_PROP);
if (target != null)
{
VisitOptimizedCall(node, target, type, child);
}
else
{
if (type == Token.CALL)
{
VisitStandardCall(node, child);
}
else
{
VisitStandardNew(node, child);
}
}
}
else
{
VisitSpecialCall(node, type, specialType, child);
}
break;
}
case Token.REF_CALL:
{
GenerateFunctionAndThisObj(child, node);
// stack: ... functionObj thisObj
child = child.GetNext();
GenerateCallArgArray(node, child, false);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("callRef", "(Lorg/mozilla/javascript/Callable;" + "Lorg/mozilla/javascript/Scriptable;" + "[Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Lorg/mozilla/javascript/Ref;");
break;
}
case Token.NUMBER:
{
double num = node.GetDouble();
if (node.GetIntProp(Node.ISNUMBER_PROP, -1) != -1)
{
cfw.AddPush(num);
}
else
{
codegen.PushNumberAsObject(cfw, num);
}
break;
}
case Token.STRING:
{
cfw.AddPush(node.GetString());
break;
}
case Token.THIS:
{
cfw.AddALoad(thisObjLocal);
break;
}
case Token.THISFN:
{
cfw.Add(ByteCode.ALOAD_0);
break;
}
case Token.NULL:
{
cfw.Add(ByteCode.ACONST_NULL);
break;
}
case Token.TRUE:
{
cfw.Add(ByteCode.GETSTATIC, "java/lang/Boolean", "TRUE", "Ljava/lang/Boolean;");
break;
}
case Token.FALSE:
{
cfw.Add(ByteCode.GETSTATIC, "java/lang/Boolean", "FALSE", "Ljava/lang/Boolean;");
break;
}
case Token.REGEXP:
{
// Create a new wrapper around precompiled regexp
cfw.AddALoad(contextLocal);
cfw.AddALoad(variableObjectLocal);
int i = node.GetExistingIntProp(Node.REGEXP_PROP);
cfw.Add(ByteCode.GETSTATIC, codegen.mainClassName, codegen.GetCompiledRegexpName(scriptOrFn, i), "Ljava/lang/Object;");
cfw.AddInvoke(ByteCode.INVOKESTATIC, "org/mozilla/javascript/ScriptRuntime", "wrapRegExp", "(Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "Ljava/lang/Object;" + ")Lorg/mozilla/javascript/Scriptable;");
break;
}
case Token.COMMA:
{
Node next = child.GetNext();
while (next != null)
{
GenerateExpression(child, node);
cfw.Add(ByteCode.POP);
child = next;
next = next.GetNext();
}
GenerateExpression(child, node);
break;
}
case Token.ENUM_NEXT:
case Token.ENUM_ID:
{
int local = GetLocalBlockRegister(node);
cfw.AddALoad(local);
if (type == Token.ENUM_NEXT)
{
AddScriptRuntimeInvoke("enumNext", "(Ljava/lang/Object;)Ljava/lang/Boolean;");
}
else
{
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("enumId", "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
}
break;
}
case Token.ARRAYLIT:
{
VisitArrayLiteral(node, child, false);
break;
}
case Token.OBJECTLIT:
{
VisitObjectLiteral(node, child, false);
break;
}
case Token.NOT:
{
int trueTarget = cfw.AcquireLabel();
int falseTarget = cfw.AcquireLabel();
int beyond = cfw.AcquireLabel();
GenerateIfJump(child, node, trueTarget, falseTarget);
cfw.MarkLabel(trueTarget);
cfw.Add(ByteCode.GETSTATIC, "java/lang/Boolean", "FALSE", "Ljava/lang/Boolean;");
cfw.Add(ByteCode.GOTO, beyond);
cfw.MarkLabel(falseTarget);
cfw.Add(ByteCode.GETSTATIC, "java/lang/Boolean", "TRUE", "Ljava/lang/Boolean;");
cfw.MarkLabel(beyond);
cfw.AdjustStackTop(-1);
break;
}
case Token.BITNOT:
{
GenerateExpression(child, node);
AddScriptRuntimeInvoke("toInt32", "(Ljava/lang/Object;)I");
cfw.AddPush(-1);
// implement ~a as (a ^ -1)
cfw.Add(ByteCode.IXOR);
cfw.Add(ByteCode.I2D);
AddDoubleWrap();
break;
}
case Token.VOID:
{
GenerateExpression(child, node);
cfw.Add(ByteCode.POP);
Codegen.PushUndefined(cfw);
break;
}
case Token.TYPEOF:
{
GenerateExpression(child, node);
AddScriptRuntimeInvoke("typeof", "(Ljava/lang/Object;" + ")Ljava/lang/String;");
break;
}
case Token.TYPEOFNAME:
{
VisitTypeofname(node);
break;
}
case Token.INC:
case Token.DEC:
{
VisitIncDec(node);
break;
}
case Token.OR:
case Token.AND:
{
GenerateExpression(child, node);
cfw.Add(ByteCode.DUP);
AddScriptRuntimeInvoke("toBoolean", "(Ljava/lang/Object;)Z");
int falseTarget = cfw.AcquireLabel();
if (type == Token.AND)
{
cfw.Add(ByteCode.IFEQ, falseTarget);
}
else
{
cfw.Add(ByteCode.IFNE, falseTarget);
}
cfw.Add(ByteCode.POP);
GenerateExpression(child.GetNext(), node);
cfw.MarkLabel(falseTarget);
break;
}
case Token.HOOK:
{
Node ifThen = child.GetNext();
Node ifElse = ifThen.GetNext();
GenerateExpression(child, node);
AddScriptRuntimeInvoke("toBoolean", "(Ljava/lang/Object;)Z");
int elseTarget = cfw.AcquireLabel();
cfw.Add(ByteCode.IFEQ, elseTarget);
short stack = cfw.GetStackTop();
GenerateExpression(ifThen, node);
int afterHook = cfw.AcquireLabel();
cfw.Add(ByteCode.GOTO, afterHook);
cfw.MarkLabel(elseTarget, stack);
GenerateExpression(ifElse, node);
cfw.MarkLabel(afterHook);
break;
}
case Token.ADD:
{
GenerateExpression(child, node);
GenerateExpression(child.GetNext(), node);
switch (node.GetIntProp(Node.ISNUMBER_PROP, -1))
{
case Node.BOTH:
{
cfw.Add(ByteCode.DADD);
break;
}
case Node.LEFT:
{
AddOptRuntimeInvoke("add", "(DLjava/lang/Object;)Ljava/lang/Object;");
break;
}
case Node.RIGHT:
{
AddOptRuntimeInvoke("add", "(Ljava/lang/Object;D)Ljava/lang/Object;");
break;
}
default:
{
if (child.GetType() == Token.STRING)
{
AddScriptRuntimeInvoke("add", "(Ljava/lang/CharSequence;" + "Ljava/lang/Object;" + ")Ljava/lang/CharSequence;");
}
else
{
if (child.GetNext().GetType() == Token.STRING)
{
AddScriptRuntimeInvoke("add", "(Ljava/lang/Object;" + "Ljava/lang/CharSequence;" + ")Ljava/lang/CharSequence;");
}
else
{
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("add", "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
}
}
break;
}
}
break;
}
case Token.MUL:
{
VisitArithmetic(node, ByteCode.DMUL, child, parent);
break;
}
case Token.SUB:
{
VisitArithmetic(node, ByteCode.DSUB, child, parent);
break;
}
case Token.DIV:
case Token.MOD:
{
VisitArithmetic(node, type == Token.DIV ? ByteCode.DDIV : ByteCode.DREM, child, parent);
break;
}
case Token.BITOR:
case Token.BITXOR:
case Token.BITAND:
case Token.LSH:
case Token.RSH:
case Token.URSH:
{
VisitBitOp(node, type, child);
break;
}
case Token.POS:
case Token.NEG:
{
GenerateExpression(child, node);
AddObjectToDouble();
if (type == Token.NEG)
{
cfw.Add(ByteCode.DNEG);
}
AddDoubleWrap();
break;
}
case Token.TO_DOUBLE:
{
// cnvt to double (not Double)
GenerateExpression(child, node);
AddObjectToDouble();
break;
}
case Token.TO_OBJECT:
{
// convert from double
int prop = -1;
if (child.GetType() == Token.NUMBER)
{
prop = child.GetIntProp(Node.ISNUMBER_PROP, -1);
}
if (prop != -1)
{
child.RemoveProp(Node.ISNUMBER_PROP);
GenerateExpression(child, node);
child.PutIntProp(Node.ISNUMBER_PROP, prop);
}
else
{
GenerateExpression(child, node);
AddDoubleWrap();
}
break;
}
case Token.IN:
case Token.INSTANCEOF:
case Token.LE:
case Token.LT:
case Token.GE:
case Token.GT:
{
int trueGOTO = cfw.AcquireLabel();
int falseGOTO = cfw.AcquireLabel();
VisitIfJumpRelOp(node, child, trueGOTO, falseGOTO);
AddJumpedBooleanWrap(trueGOTO, falseGOTO);
break;
}
case Token.EQ:
case Token.NE:
case Token.SHEQ:
case Token.SHNE:
{
int trueGOTO = cfw.AcquireLabel();
int falseGOTO = cfw.AcquireLabel();
VisitIfJumpEqOp(node, child, trueGOTO, falseGOTO);
AddJumpedBooleanWrap(trueGOTO, falseGOTO);
break;
}
case Token.GETPROP:
case Token.GETPROPNOWARN:
{
VisitGetProp(node, child);
break;
}
case Token.GETELEM:
{
GenerateExpression(child, node);
// object
GenerateExpression(child.GetNext(), node);
// id
cfw.AddALoad(contextLocal);
if (node.GetIntProp(Node.ISNUMBER_PROP, -1) != -1)
{
AddScriptRuntimeInvoke("getObjectIndex", "(Ljava/lang/Object;D" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
}
else
{
cfw.AddALoad(variableObjectLocal);
AddScriptRuntimeInvoke("getObjectElem", "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + ")Ljava/lang/Object;");
}
break;
}
case Token.GET_REF:
{
GenerateExpression(child, node);
// reference
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("refGet", "(Lorg/mozilla/javascript/Ref;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
break;
}
case Token.GETVAR:
{
VisitGetVar(node);
break;
}
case Token.SETVAR:
{
VisitSetVar(node, child, true);
break;
}
case Token.SETNAME:
{
VisitSetName(node, child);
break;
}
case Token.STRICT_SETNAME:
{
VisitStrictSetName(node, child);
break;
}
case Token.SETCONST:
{
VisitSetConst(node, child);
break;
}
case Token.SETCONSTVAR:
{
VisitSetConstVar(node, child, true);
break;
}
case Token.SETPROP:
case Token.SETPROP_OP:
{
VisitSetProp(type, node, child);
break;
}
case Token.SETELEM:
case Token.SETELEM_OP:
{
VisitSetElem(type, node, child);
break;
}
case Token.SET_REF:
case Token.SET_REF_OP:
{
GenerateExpression(child, node);
child = child.GetNext();
if (type == Token.SET_REF_OP)
{
cfw.Add(ByteCode.DUP);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("refGet", "(Lorg/mozilla/javascript/Ref;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
}
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("refSet", "(Lorg/mozilla/javascript/Ref;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
break;
}
case Token.DEL_REF:
{
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("refDel", "(Lorg/mozilla/javascript/Ref;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
break;
}
case Token.DELPROP:
{
bool isName = child.GetType() == Token.BINDNAME;
GenerateExpression(child, node);
child = child.GetNext();
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
cfw.AddPush(isName);
AddScriptRuntimeInvoke("delete", "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "Z)Ljava/lang/Object;");
break;
}
case Token.BINDNAME:
{
while (child != null)
{
GenerateExpression(child, node);
child = child.GetNext();
}
// Generate code for "ScriptRuntime.bind(varObj, "s")"
cfw.AddALoad(contextLocal);
cfw.AddALoad(variableObjectLocal);
cfw.AddPush(node.GetString());
AddScriptRuntimeInvoke("bind", "(Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "Ljava/lang/String;" + ")Lorg/mozilla/javascript/Scriptable;");
break;
}
case Token.LOCAL_LOAD:
{
cfw.AddALoad(GetLocalBlockRegister(node));
break;
}
case Token.REF_SPECIAL:
{
string special = (string)node.GetProp(Node.NAME_PROP);
GenerateExpression(child, node);
cfw.AddPush(special);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("specialRef", "(Ljava/lang/Object;" + "Ljava/lang/String;" + "Lorg/mozilla/javascript/Context;" + ")Lorg/mozilla/javascript/Ref;");
break;
}
case Token.REF_MEMBER:
case Token.REF_NS_MEMBER:
case Token.REF_NAME:
case Token.REF_NS_NAME:
{
int memberTypeFlags = node.GetIntProp(Node.MEMBER_TYPE_PROP, 0);
do
{
// generate possible target, possible namespace and member
GenerateExpression(child, node);
child = child.GetNext();
}
while (child != null);
cfw.AddALoad(contextLocal);
string methodName;
string signature;
switch (type)
{
case Token.REF_MEMBER:
{
methodName = "memberRef";
signature = "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "I" + ")Lorg/mozilla/javascript/Ref;";
break;
}
case Token.REF_NS_MEMBER:
{
methodName = "memberRef";
signature = "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "I" + ")Lorg/mozilla/javascript/Ref;";
break;
}
case Token.REF_NAME:
{
methodName = "nameRef";
signature = "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "I" + ")Lorg/mozilla/javascript/Ref;";
cfw.AddALoad(variableObjectLocal);
break;
}
case Token.REF_NS_NAME:
{
methodName = "nameRef";
signature = "(Ljava/lang/Object;" + "Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "I" + ")Lorg/mozilla/javascript/Ref;";
cfw.AddALoad(variableObjectLocal);
break;
}
default:
{
throw Kit.CodeBug();
}
}
cfw.AddPush(memberTypeFlags);
AddScriptRuntimeInvoke(methodName, signature);
break;
}
case Token.DOTQUERY:
{
VisitDotQuery(node, child);
break;
}
case Token.ESCXMLATTR:
{
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("escapeAttributeValue", "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/String;");
break;
}
case Token.ESCXMLTEXT:
{
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("escapeTextValue", "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/String;");
break;
}
case Token.DEFAULTNAMESPACE:
{
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
AddScriptRuntimeInvoke("setDefaultNamespace", "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + ")Ljava/lang/Object;");
break;
}
case Token.YIELD:
{
GenerateYieldPoint(node, true);
break;
}
case Token.WITHEXPR:
{
Node enterWith = child;
Node with = enterWith.GetNext();
Node leaveWith = with.GetNext();
GenerateStatement(enterWith);
GenerateExpression(with.GetFirstChild(), with);
GenerateStatement(leaveWith);
break;
}
case Token.ARRAYCOMP:
{
Node initStmt = child;
Node expr = child.GetNext();
GenerateStatement(initStmt);
GenerateExpression(expr, node);
break;
}
default:
{
throw new Exception("Unexpected node type " + type);
}
}
}
private void GenerateStatement(Node node)
{
UpdateLineNumber(node);
int type = node.GetType();
Node child = node.GetFirstChild();
switch (type)
{
case Token.LOOP:
case Token.LABEL:
case Token.WITH:
case Token.SCRIPT:
case Token.BLOCK:
case Token.EMPTY:
{
// no-ops.
if (compilerEnv.IsGenerateObserverCount())
{
// Need to add instruction count even for no-ops to catch
// cases like while (1) {}
AddInstructionCount(1);
}
while (child != null)
{
GenerateStatement(child);
child = child.GetNext();
}
break;
}
case Token.LOCAL_BLOCK:
{
bool prevLocal = inLocalBlock;
inLocalBlock = true;
int local = GetNewWordLocal();
if (isGenerator)
{
cfw.Add(ByteCode.ACONST_NULL);
cfw.AddAStore(local);
}
node.PutIntProp(Node.LOCAL_PROP, local);
while (child != null)
{
GenerateStatement(child);
child = child.GetNext();
}
ReleaseWordLocal((short)local);
node.RemoveProp(Node.LOCAL_PROP);
inLocalBlock = prevLocal;
break;
}
case Token.FUNCTION:
{
int fnIndex = node.GetExistingIntProp(Node.FUNCTION_PROP);
OptFunctionNode ofn = OptFunctionNode.Get(scriptOrFn, fnIndex);
int t = ofn.fnode.GetFunctionType();
if (t == FunctionNode.FUNCTION_EXPRESSION_STATEMENT)
{
VisitFunction(ofn, t);
}
else
{
if (t != FunctionNode.FUNCTION_STATEMENT)
{
throw Codegen.BadTree();
}
}
break;
}
case Token.TRY:
{
VisitTryCatchFinally((Jump)node, child);
break;
}
case Token.CATCH_SCOPE:
{
// nothing stays on the stack on entry into a catch scope
cfw.SetStackTop((short)0);
int local = GetLocalBlockRegister(node);
int scopeIndex = node.GetExistingIntProp(Node.CATCH_SCOPE_PROP);
string name = child.GetString();
// name of exception
child = child.GetNext();
GenerateExpression(child, node);
// load expression object
if (scopeIndex == 0)
{
cfw.Add(ByteCode.ACONST_NULL);
}
else
{
// Load previous catch scope object
cfw.AddALoad(local);
}
cfw.AddPush(name);
cfw.AddALoad(contextLocal);
cfw.AddALoad(variableObjectLocal);
AddScriptRuntimeInvoke("newCatchScope", "(Ljava/lang/Throwable;" + "Lorg/mozilla/javascript/Scriptable;" + "Ljava/lang/String;" + "Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + ")Lorg/mozilla/javascript/Scriptable;");
cfw.AddAStore(local);
break;
}
case Token.THROW:
{
GenerateExpression(child, node);
if (compilerEnv.IsGenerateObserverCount())
{
AddInstructionCount();
}
GenerateThrowJavaScriptException();
break;
}
case Token.RETHROW:
{
if (compilerEnv.IsGenerateObserverCount())
{
AddInstructionCount();
}
cfw.AddALoad(GetLocalBlockRegister(node));
cfw.Add(ByteCode.ATHROW);
break;
}
case Token.RETURN_RESULT:
case Token.RETURN:
{
if (!isGenerator)
{
if (child != null)
{
GenerateExpression(child, node);
}
else
{
if (type == Token.RETURN)
{
Codegen.PushUndefined(cfw);
}
else
{
if (popvLocal < 0)
{
throw Codegen.BadTree();
}
cfw.AddALoad(popvLocal);
}
}
}
if (compilerEnv.IsGenerateObserverCount())
{
AddInstructionCount();
}
if (epilogueLabel == -1)
{
if (!hasVarsInRegs)
{
throw Codegen.BadTree();
}
epilogueLabel = cfw.AcquireLabel();
}
cfw.Add(ByteCode.GOTO, epilogueLabel);
break;
}
case Token.SWITCH:
{
if (compilerEnv.IsGenerateObserverCount())
{
AddInstructionCount();
}
VisitSwitch((Jump)node, child);
break;
}
case Token.ENTERWITH:
{
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
cfw.AddALoad(variableObjectLocal);
AddScriptRuntimeInvoke("enterWith", "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + ")Lorg/mozilla/javascript/Scriptable;");
cfw.AddAStore(variableObjectLocal);
IncReferenceWordLocal(variableObjectLocal);
break;
}
case Token.LEAVEWITH:
{
cfw.AddALoad(variableObjectLocal);
AddScriptRuntimeInvoke("leaveWith", "(Lorg/mozilla/javascript/Scriptable;" + ")Lorg/mozilla/javascript/Scriptable;");
cfw.AddAStore(variableObjectLocal);
DecReferenceWordLocal(variableObjectLocal);
break;
}
case Token.ENUM_INIT_KEYS:
case Token.ENUM_INIT_VALUES:
case Token.ENUM_INIT_ARRAY:
{
GenerateExpression(child, node);
cfw.AddALoad(contextLocal);
int enumType = type == Token.ENUM_INIT_KEYS ? ScriptRuntime.ENUMERATE_KEYS : type == Token.ENUM_INIT_VALUES ? ScriptRuntime.ENUMERATE_VALUES : ScriptRuntime.ENUMERATE_ARRAY;
cfw.AddPush(enumType);
AddScriptRuntimeInvoke("enumInit", "(Ljava/lang/Object;" + "Lorg/mozilla/javascript/Context;" + "I" + ")Ljava/lang/Object;");
cfw.AddAStore(GetLocalBlockRegister(node));
break;
}
case Token.EXPR_VOID:
{
if (child.GetType() == Token.SETVAR)
{
VisitSetVar(child, child.GetFirstChild(), false);
}
else
{
if (child.GetType() == Token.SETCONSTVAR)
{
VisitSetConstVar(child, child.GetFirstChild(), false);
}
else
{
if (child.GetType() == Token.YIELD)
{
GenerateYieldPoint(child, false);
}
else
{
GenerateExpression(child, node);
if (node.GetIntProp(Node.ISNUMBER_PROP, -1) != -1)
{
cfw.Add(ByteCode.POP2);
}
else
{
cfw.Add(ByteCode.POP);
}
}
}
}
break;
}
case Token.EXPR_RESULT:
{
GenerateExpression(child, node);
if (popvLocal < 0)
{
popvLocal = GetNewWordLocal();
}
cfw.AddAStore(popvLocal);
break;
}
case Token.TARGET:
{
if (compilerEnv.IsGenerateObserverCount())
{
AddInstructionCount();
}
int label = GetTargetLabel(node);
cfw.MarkLabel(label);
if (compilerEnv.IsGenerateObserverCount())
{
SaveCurrentCodeOffset();
}
break;
}
case Token.JSR:
case Token.GOTO:
case Token.IFEQ:
case Token.IFNE:
{
if (compilerEnv.IsGenerateObserverCount())
{
AddInstructionCount();
}
VisitGoto((Jump)node, type, child);
break;
}
case Token.FINALLY:
{
// This is the non-exception case for a finally block. In
// other words, since we inline finally blocks wherever
// jsr was previously used, and jsr is only used when the
// function is not a generator, we don't need to generate
// this case if the function isn't a generator.
if (!isGenerator)
{
break;
}
if (compilerEnv.IsGenerateObserverCount())
{
SaveCurrentCodeOffset();
}
// there is exactly one value on the stack when enterring
// finally blocks: the return address (or its int encoding)
cfw.SetStackTop((short)1);
// Save return address in a new local
int finallyRegister = GetNewWordLocal();
int finallyStart = cfw.AcquireLabel();
int finallyEnd = cfw.AcquireLabel();
cfw.MarkLabel(finallyStart);
GenerateIntegerWrap();
cfw.AddAStore(finallyRegister);
while (child != null)
{
GenerateStatement(child);
child = child.GetNext();
}
cfw.AddALoad(finallyRegister);
cfw.Add(ByteCode.CHECKCAST, "java/lang/Integer");
GenerateIntegerUnwrap();
BodyCodegen.FinallyReturnPoint ret = finallys.Get(node);
ret.tableLabel = cfw.AcquireLabel();
cfw.Add(ByteCode.GOTO, ret.tableLabel);
ReleaseWordLocal((short)finallyRegister);
cfw.MarkLabel(finallyEnd);
break;
}
case Token.DEBUGGER:
{
break;
}
default:
{
throw Codegen.BadTree();
}
}
}
private void VisitExpression(Node node, int contextFlags)
{
int type = node.GetType();
Node child = node.GetFirstChild();
int savedStackDepth = stackDepth;
switch (type)
{
case Token.FUNCTION:
{
int fnIndex = node.GetExistingIntProp(Node.FUNCTION_PROP);
FunctionNode fn = scriptOrFn.GetFunctionNode(fnIndex);
// See comments in visitStatement for Token.FUNCTION case
if (fn.GetFunctionType() != FunctionNode.FUNCTION_EXPRESSION)
{
throw Kit.CodeBug();
}
AddIndexOp(Icode_CLOSURE_EXPR, fnIndex);
StackChange(1);
break;
}
case Token.LOCAL_LOAD:
{
int localIndex = GetLocalBlockRef(node);
AddIndexOp(Token.LOCAL_LOAD, localIndex);
StackChange(1);
break;
}
case Token.COMMA:
{
Node lastChild = node.GetLastChild();
while (child != lastChild)
{
VisitExpression(child, 0);
AddIcode(Icode_POP);
StackChange(-1);
child = child.GetNext();
}
// Preserve tail context flag if any
VisitExpression(child, contextFlags & ECF_TAIL);
break;
}
case Token.USE_STACK:
{
// Indicates that stack was modified externally,
// like placed catch object
StackChange(1);
break;
}
case Token.REF_CALL:
case Token.CALL:
case Token.NEW:
{
if (type == Token.NEW)
{
VisitExpression(child, 0);
}
else
{
GenerateCallFunAndThis(child);
}
int argCount = 0;
while ((child = child.GetNext()) != null)
{
VisitExpression(child, 0);
++argCount;
}
int callType = node.GetIntProp(Node.SPECIALCALL_PROP, Node.NON_SPECIALCALL);
if (type != Token.REF_CALL && callType != Node.NON_SPECIALCALL)
{
// embed line number and source filename
AddIndexOp(Icode_CALLSPECIAL, argCount);
AddUint8(callType);
AddUint8(type == Token.NEW ? 1 : 0);
AddUint16(lineNumber & unchecked((int)(0xFFFF)));
}
else
{
// Only use the tail call optimization if we're not in a try
// or we're not generating debug info (since the
// optimization will confuse the debugger)
if (type == Token.CALL && (contextFlags & ECF_TAIL) != 0 && !compilerEnv.IsGenerateDebugInfo() && !itsInTryFlag)
{
type = Icode_TAIL_CALL;
}
AddIndexOp(type, argCount);
}
// adjust stack
if (type == Token.NEW)
{
// new: f, args -> result
StackChange(-argCount);
}
else
{
// call: f, thisObj, args -> result
// ref_call: f, thisObj, args -> ref
StackChange(-1 - argCount);
}
if (argCount > itsData.itsMaxCalleeArgs)
{
itsData.itsMaxCalleeArgs = argCount;
}
break;
}
case Token.AND:
case Token.OR:
{
VisitExpression(child, 0);
AddIcode(Icode_DUP);
StackChange(1);
int afterSecondJumpStart = iCodeTop;
int jump = (type == Token.AND) ? Token.IFNE : Token.IFEQ;
AddGotoOp(jump);
StackChange(-1);
AddIcode(Icode_POP);
StackChange(-1);
child = child.GetNext();
// Preserve tail context flag if any
VisitExpression(child, contextFlags & ECF_TAIL);
ResolveForwardGoto(afterSecondJumpStart);
break;
}
case Token.HOOK:
{
Node ifThen = child.GetNext();
Node ifElse = ifThen.GetNext();
VisitExpression(child, 0);
int elseJumpStart = iCodeTop;
AddGotoOp(Token.IFNE);
StackChange(-1);
// Preserve tail context flag if any
VisitExpression(ifThen, contextFlags & ECF_TAIL);
int afterElseJumpStart = iCodeTop;
AddGotoOp(Token.GOTO);
ResolveForwardGoto(elseJumpStart);
stackDepth = savedStackDepth;
// Preserve tail context flag if any
VisitExpression(ifElse, contextFlags & ECF_TAIL);
ResolveForwardGoto(afterElseJumpStart);
break;
}
case Token.GETPROP:
case Token.GETPROPNOWARN:
{
VisitExpression(child, 0);
child = child.GetNext();
AddStringOp(type, child.GetString());
break;
}
case Token.DELPROP:
{
bool isName = child.GetType() == Token.BINDNAME;
VisitExpression(child, 0);
child = child.GetNext();
VisitExpression(child, 0);
if (isName)
{
// special handling for delete name
AddIcode(Icode_DELNAME);
}
else
{
AddToken(Token.DELPROP);
}
StackChange(-1);
break;
}
case Token.GETELEM:
case Token.BITAND:
case Token.BITOR:
case Token.BITXOR:
case Token.LSH:
case Token.RSH:
case Token.URSH:
case Token.ADD:
case Token.SUB:
case Token.MOD:
case Token.DIV:
case Token.MUL:
case Token.EQ:
case Token.NE:
case Token.SHEQ:
case Token.SHNE:
case Token.IN:
case Token.INSTANCEOF:
case Token.LE:
case Token.LT:
case Token.GE:
case Token.GT:
{
VisitExpression(child, 0);
child = child.GetNext();
VisitExpression(child, 0);
AddToken(type);
StackChange(-1);
break;
}
case Token.POS:
case Token.NEG:
case Token.NOT:
case Token.BITNOT:
case Token.TYPEOF:
case Token.VOID:
{
VisitExpression(child, 0);
if (type == Token.VOID)
{
AddIcode(Icode_POP);
AddIcode(Icode_UNDEF);
}
else
{
AddToken(type);
}
break;
}
case Token.GET_REF:
case Token.DEL_REF:
{
VisitExpression(child, 0);
AddToken(type);
break;
}
case Token.SETPROP:
case Token.SETPROP_OP:
{
VisitExpression(child, 0);
child = child.GetNext();
string property = child.GetString();
child = child.GetNext();
if (type == Token.SETPROP_OP)
{
AddIcode(Icode_DUP);
StackChange(1);
AddStringOp(Token.GETPROP, property);
// Compensate for the following USE_STACK
StackChange(-1);
}
VisitExpression(child, 0);
AddStringOp(Token.SETPROP, property);
StackChange(-1);
break;
}
case Token.SETELEM:
case Token.SETELEM_OP:
{
VisitExpression(child, 0);
child = child.GetNext();
VisitExpression(child, 0);
child = child.GetNext();
if (type == Token.SETELEM_OP)
{
AddIcode(Icode_DUP2);
StackChange(2);
AddToken(Token.GETELEM);
StackChange(-1);
// Compensate for the following USE_STACK
StackChange(-1);
}
VisitExpression(child, 0);
AddToken(Token.SETELEM);
StackChange(-2);
break;
}
case Token.SET_REF:
case Token.SET_REF_OP:
{
VisitExpression(child, 0);
child = child.GetNext();
if (type == Token.SET_REF_OP)
{
AddIcode(Icode_DUP);
StackChange(1);
AddToken(Token.GET_REF);
// Compensate for the following USE_STACK
StackChange(-1);
}
VisitExpression(child, 0);
AddToken(Token.SET_REF);
StackChange(-1);
break;
}
case Token.STRICT_SETNAME:
case Token.SETNAME:
{
string name = child.GetString();
VisitExpression(child, 0);
child = child.GetNext();
VisitExpression(child, 0);
AddStringOp(type, name);
StackChange(-1);
break;
}
case Token.SETCONST:
{
string name = child.GetString();
VisitExpression(child, 0);
child = child.GetNext();
VisitExpression(child, 0);
AddStringOp(Icode_SETCONST, name);
StackChange(-1);
break;
}
case Token.TYPEOFNAME:
{
int index = -1;
// use typeofname if an activation frame exists
// since the vars all exist there instead of in jregs
if (itsInFunctionFlag && !itsData.itsNeedsActivation)
{
index = scriptOrFn.GetIndexForNameNode(node);
}
if (index == -1)
{
AddStringOp(Icode_TYPEOFNAME, node.GetString());
StackChange(1);
}
else
{
AddVarOp(Token.GETVAR, index);
StackChange(1);
AddToken(Token.TYPEOF);
}
break;
}
case Token.BINDNAME:
case Token.NAME:
case Token.STRING:
{
AddStringOp(type, node.GetString());
StackChange(1);
break;
}
case Token.INC:
case Token.DEC:
{
VisitIncDec(node, child);
break;
}
case Token.NUMBER:
{
double num = node.GetDouble();
int inum = (int)num;
if (inum == num)
{
if (inum == 0)
{
AddIcode(Icode_ZERO);
// Check for negative zero
if (1.0 / num < 0.0)
{
AddToken(Token.NEG);
}
}
else
{
if (inum == 1)
{
AddIcode(Icode_ONE);
}
else
{
if ((short)inum == inum)
{
AddIcode(Icode_SHORTNUMBER);
// write short as uin16 bit pattern
AddUint16(inum & unchecked((int)(0xFFFF)));
}
else
{
AddIcode(Icode_INTNUMBER);
AddInt(inum);
}
}
}
}
else
{
int index = GetDoubleIndex(num);
AddIndexOp(Token.NUMBER, index);
}
StackChange(1);
break;
}
case Token.GETVAR:
{
if (itsData.itsNeedsActivation)
{
Kit.CodeBug();
}
int index = scriptOrFn.GetIndexForNameNode(node);
AddVarOp(Token.GETVAR, index);
StackChange(1);
break;
}
case Token.SETVAR:
{
if (itsData.itsNeedsActivation)
{
Kit.CodeBug();
}
int index = scriptOrFn.GetIndexForNameNode(child);
child = child.GetNext();
VisitExpression(child, 0);
AddVarOp(Token.SETVAR, index);
break;
}
case Token.SETCONSTVAR:
{
if (itsData.itsNeedsActivation)
{
Kit.CodeBug();
}
int index = scriptOrFn.GetIndexForNameNode(child);
child = child.GetNext();
VisitExpression(child, 0);
AddVarOp(Token.SETCONSTVAR, index);
break;
}
case Token.NULL:
case Token.THIS:
case Token.THISFN:
case Token.FALSE:
case Token.TRUE:
{
AddToken(type);
StackChange(1);
break;
}
case Token.ENUM_NEXT:
case Token.ENUM_ID:
{
AddIndexOp(type, GetLocalBlockRef(node));
StackChange(1);
break;
}
case Token.REGEXP:
{
int index = node.GetExistingIntProp(Node.REGEXP_PROP);
AddIndexOp(Token.REGEXP, index);
StackChange(1);
break;
}
case Token.ARRAYLIT:
case Token.OBJECTLIT:
{
VisitLiteral(node, child);
break;
}
case Token.ARRAYCOMP:
{
VisitArrayComprehension(node, child, child.GetNext());
break;
}
case Token.REF_SPECIAL:
{
VisitExpression(child, 0);
AddStringOp(type, (string)node.GetProp(Node.NAME_PROP));
break;
}
case Token.REF_MEMBER:
case Token.REF_NS_MEMBER:
case Token.REF_NAME:
case Token.REF_NS_NAME:
{
int memberTypeFlags = node.GetIntProp(Node.MEMBER_TYPE_PROP, 0);
// generate possible target, possible namespace and member
int childCount = 0;
do
{
VisitExpression(child, 0);
++childCount;
child = child.GetNext();
}
while (child != null);
AddIndexOp(type, memberTypeFlags);
StackChange(1 - childCount);
break;
}
case Token.DOTQUERY:
{
int queryPC;
UpdateLineNumber(node);
VisitExpression(child, 0);
AddIcode(Icode_ENTERDQ);
StackChange(-1);
queryPC = iCodeTop;
VisitExpression(child.GetNext(), 0);
AddBackwardGoto(Icode_LEAVEDQ, queryPC);
break;
}
case Token.DEFAULTNAMESPACE:
case Token.ESCXMLATTR:
case Token.ESCXMLTEXT:
{
VisitExpression(child, 0);
AddToken(type);
break;
}
case Token.YIELD:
{
if (child != null)
{
VisitExpression(child, 0);
}
else
{
AddIcode(Icode_UNDEF);
StackChange(1);
}
AddToken(Token.YIELD);
AddUint16(node.GetLineno() & unchecked((int)(0xFFFF)));
break;
}
case Token.WITHEXPR:
{
Node enterWith = node.GetFirstChild();
Node with = enterWith.GetNext();
VisitExpression(enterWith.GetFirstChild(), 0);
AddToken(Token.ENTERWITH);
StackChange(-1);
VisitExpression(with.GetFirstChild(), 0);
AddToken(Token.LEAVEWITH);
break;
}
default:
{
throw BadTree(node);
}
}
if (savedStackDepth + 1 != stackDepth)
{
Kit.CodeBug();
}
}
private void VisitStatement(Node node, int initialStackDepth)
{
int type = node.GetType();
Node child = node.GetFirstChild();
switch (type)
{
case Token.FUNCTION:
{
int fnIndex = node.GetExistingIntProp(Node.FUNCTION_PROP);
int fnType = scriptOrFn.GetFunctionNode(fnIndex).GetFunctionType();
// Only function expressions or function expression
// statements need closure code creating new function
// object on stack as function statements are initialized
// at script/function start.
// In addition, function expressions can not be present here
// at statement level, they must only be present as expressions.
if (fnType == FunctionNode.FUNCTION_EXPRESSION_STATEMENT)
{
AddIndexOp(Icode_CLOSURE_STMT, fnIndex);
}
else
{
if (fnType != FunctionNode.FUNCTION_STATEMENT)
{
throw Kit.CodeBug();
}
}
// For function statements or function expression statements
// in scripts, we need to ensure that the result of the script
// is the function if it is the last statement in the script.
// For example, eval("function () {}") should return a
// function, not undefined.
if (!itsInFunctionFlag)
{
AddIndexOp(Icode_CLOSURE_EXPR, fnIndex);
StackChange(1);
AddIcode(Icode_POP_RESULT);
StackChange(-1);
}
break;
}
case Token.LABEL:
case Token.LOOP:
case Token.BLOCK:
case Token.EMPTY:
case Token.WITH:
{
UpdateLineNumber(node);
goto case Token.SCRIPT;
}
case Token.SCRIPT:
{
// fall through
while (child != null)
{
VisitStatement(child, initialStackDepth);
child = child.GetNext();
}
break;
}
case Token.ENTERWITH:
{
VisitExpression(child, 0);
AddToken(Token.ENTERWITH);
StackChange(-1);
break;
}
case Token.LEAVEWITH:
{
AddToken(Token.LEAVEWITH);
break;
}
case Token.LOCAL_BLOCK:
{
int local = AllocLocal();
node.PutIntProp(Node.LOCAL_PROP, local);
UpdateLineNumber(node);
while (child != null)
{
VisitStatement(child, initialStackDepth);
child = child.GetNext();
}
AddIndexOp(Icode_LOCAL_CLEAR, local);
ReleaseLocal(local);
break;
}
case Token.DEBUGGER:
{
AddIcode(Icode_DEBUGGER);
break;
}
case Token.SWITCH:
{
UpdateLineNumber(node);
// See comments in IRFactory.createSwitch() for description
// of SWITCH node
VisitExpression(child, 0);
for (Jump caseNode = (Jump)child.GetNext(); caseNode != null; caseNode = (Jump)caseNode.GetNext())
{
if (caseNode.GetType() != Token.CASE)
{
throw BadTree(caseNode);
}
Node test = caseNode.GetFirstChild();
AddIcode(Icode_DUP);
StackChange(1);
VisitExpression(test, 0);
AddToken(Token.SHEQ);
StackChange(-1);
// If true, Icode_IFEQ_POP will jump and remove case
// value from stack
AddGoto(caseNode.target, Icode_IFEQ_POP);
StackChange(-1);
}
AddIcode(Icode_POP);
StackChange(-1);
break;
}
case Token.TARGET:
{
MarkTargetLabel(node);
break;
}
case Token.IFEQ:
case Token.IFNE:
{
Node target = ((Jump)node).target;
VisitExpression(child, 0);
AddGoto(target, type);
StackChange(-1);
break;
}
case Token.GOTO:
{
Node target = ((Jump)node).target;
AddGoto(target, type);
break;
}
case Token.JSR:
{
Node target = ((Jump)node).target;
AddGoto(target, Icode_GOSUB);
break;
}
case Token.FINALLY:
{
// Account for incomming GOTOSUB address
StackChange(1);
int finallyRegister = GetLocalBlockRef(node);
AddIndexOp(Icode_STARTSUB, finallyRegister);
StackChange(-1);
while (child != null)
{
VisitStatement(child, initialStackDepth);
child = child.GetNext();
}
AddIndexOp(Icode_RETSUB, finallyRegister);
break;
}
case Token.EXPR_VOID:
case Token.EXPR_RESULT:
{
UpdateLineNumber(node);
VisitExpression(child, 0);
AddIcode((type == Token.EXPR_VOID) ? Icode_POP : Icode_POP_RESULT);
StackChange(-1);
break;
}
case Token.TRY:
{
Jump tryNode = (Jump)node;
int exceptionObjectLocal = GetLocalBlockRef(tryNode);
int scopeLocal = AllocLocal();
AddIndexOp(Icode_SCOPE_SAVE, scopeLocal);
int tryStart = iCodeTop;
bool savedFlag = itsInTryFlag;
itsInTryFlag = true;
while (child != null)
{
VisitStatement(child, initialStackDepth);
child = child.GetNext();
}
itsInTryFlag = savedFlag;
Node catchTarget = tryNode.target;
if (catchTarget != null)
{
int catchStartPC = labelTable[GetTargetLabel(catchTarget)];
AddExceptionHandler(tryStart, catchStartPC, catchStartPC, false, exceptionObjectLocal, scopeLocal);
}
Node finallyTarget = tryNode.GetFinally();
if (finallyTarget != null)
{
int finallyStartPC = labelTable[GetTargetLabel(finallyTarget)];
AddExceptionHandler(tryStart, finallyStartPC, finallyStartPC, true, exceptionObjectLocal, scopeLocal);
}
AddIndexOp(Icode_LOCAL_CLEAR, scopeLocal);
ReleaseLocal(scopeLocal);
break;
}
case Token.CATCH_SCOPE:
{
int localIndex = GetLocalBlockRef(node);
int scopeIndex = node.GetExistingIntProp(Node.CATCH_SCOPE_PROP);
string name = child.GetString();
child = child.GetNext();
VisitExpression(child, 0);
// load expression object
AddStringPrefix(name);
AddIndexPrefix(localIndex);
AddToken(Token.CATCH_SCOPE);
AddUint8(scopeIndex != 0 ? 1 : 0);
StackChange(-1);
break;
}
case Token.THROW:
{
UpdateLineNumber(node);
VisitExpression(child, 0);
AddToken(Token.THROW);
AddUint16(lineNumber & unchecked((int)(0xFFFF)));
StackChange(-1);
break;
}
case Token.RETHROW:
{
UpdateLineNumber(node);
AddIndexOp(Token.RETHROW, GetLocalBlockRef(node));
break;
}
case Token.RETURN:
{
UpdateLineNumber(node);
if (node.GetIntProp(Node.GENERATOR_END_PROP, 0) != 0)
{
// We're in a generator, so change RETURN to GENERATOR_END
AddIcode(Icode_GENERATOR_END);
AddUint16(lineNumber & unchecked((int)(0xFFFF)));
}
else
{
if (child != null)
{
VisitExpression(child, ECF_TAIL);
AddToken(Token.RETURN);
StackChange(-1);
}
else
{
AddIcode(Icode_RETUNDEF);
}
}
break;
}
case Token.RETURN_RESULT:
{
UpdateLineNumber(node);
AddToken(Token.RETURN_RESULT);
break;
}
case Token.ENUM_INIT_KEYS:
case Token.ENUM_INIT_VALUES:
case Token.ENUM_INIT_ARRAY:
{
VisitExpression(child, 0);
AddIndexOp(type, GetLocalBlockRef(node));
StackChange(-1);
break;
}
case Icode_GENERATOR:
{
break;
}
default:
{
throw BadTree(node);
}
}
if (stackDepth != initialStackDepth)
{
throw Kit.CodeBug();
}
}
private void VisitIncDec(Node node, Node child)
{
int incrDecrMask = node.GetExistingIntProp(Node.INCRDECR_PROP);
int childType = child.GetType();
switch (childType)
{
case Token.GETVAR:
{
if (itsData.itsNeedsActivation)
{
Kit.CodeBug();
}
int i = scriptOrFn.GetIndexForNameNode(child);
AddVarOp(Icode_VAR_INC_DEC, i);
AddUint8(incrDecrMask);
StackChange(1);
break;
}
case Token.NAME:
{
string name = child.GetString();
AddStringOp(Icode_NAME_INC_DEC, name);
AddUint8(incrDecrMask);
StackChange(1);
break;
}
case Token.GETPROP:
{
Node @object = child.GetFirstChild();
VisitExpression(@object, 0);
string property = @object.GetNext().GetString();
AddStringOp(Icode_PROP_INC_DEC, property);
AddUint8(incrDecrMask);
break;
}
case Token.GETELEM:
{
Node @object = child.GetFirstChild();
VisitExpression(@object, 0);
Node index = @object.GetNext();
VisitExpression(index, 0);
AddIcode(Icode_ELEM_INC_DEC);
AddUint8(incrDecrMask);
StackChange(-1);
break;
}
case Token.GET_REF:
{
Node @ref = child.GetFirstChild();
VisitExpression(@ref, 0);
AddIcode(Icode_REF_INC_DEC);
AddUint8(incrDecrMask);
break;
}
default:
{
throw BadTree(node);
}
}
}
