//
// if `dup_args' is true or any of arguments contains await.
// A copy of all arguments will be returned to the caller
//
public virtual Arguments Emit(EmitContext ec, bool dup_args, bool prepareAwait)
{
List <Argument> dups;
if ((dup_args && Count != 0) || prepareAwait)
{
dups = new List <Argument> (Count);
}
else
{
dups = null;
}
LocalTemporary lt;
foreach (Argument a in args)
{
if (prepareAwait)
{
dups.Add(a.EmitToField(ec, true));
continue;
}
a.Emit(ec);
if (!dup_args)
{
continue;
}
if (a.Expr.IsSideEffectFree)
{
//
// No need to create a temporary variable for side effect free expressions. I assume
// all side-effect free expressions are cheap, this has to be tweaked when we become
// more aggressive on detection
//
dups.Add(a);
}
else
{
ec.Emit(OpCodes.Dup);
// TODO: Release local temporary on next Emit
// Need to add a flag to argument to indicate this
lt = new LocalTemporary(a.Type);
lt.Store(ec);
dups.Add(new Argument(lt, a.ArgType));
}
}
if (dups != null)
{
return(new Arguments(dups));
}
return(null);
}
public void EmitAssign(EmitContext ec)
{
Expr.Emit(ec);
variable = new LocalTemporary(Expr.Type);
variable.Store(ec);
Expr = variable;
}
public void EmitAwaitOnCompletedDynamic(EmitContext ec, FieldExpr awaiter)
{
var critical = Module.PredefinedTypes.ICriticalNotifyCompletion;
if (!critical.Define())
{
throw new NotImplementedException();
}
var temp_critical = new LocalTemporary(critical.TypeSpec);
var label_critical = ec.DefineLabel();
var label_end = ec.DefineLabel();
//
// Special path for dynamic awaiters
//
// var awaiter = this.$awaiter as ICriticalNotifyCompletion;
// if (awaiter == null) {
// var completion = (INotifyCompletion) this.$awaiter;
// this.$builder.AwaitOnCompleted (ref completion, ref this);
// } else {
// this.$builder.AwaitUnsafeOnCompleted (ref awaiter, ref this);
// }
//
awaiter.Emit(ec);
ec.Emit(OpCodes.Isinst, critical.TypeSpec);
temp_critical.Store(ec);
temp_critical.Emit(ec);
ec.Emit(OpCodes.Brtrue_S, label_critical);
var temp = new LocalTemporary(Module.PredefinedTypes.INotifyCompletion.TypeSpec);
awaiter.Emit(ec);
ec.Emit(OpCodes.Castclass, temp.Type);
temp.Store(ec);
EmitOnCompleted(ec, temp, false);
temp.Release(ec);
ec.Emit(OpCodes.Br_S, label_end);
ec.MarkLabel(label_critical);
EmitOnCompleted(ec, temp_critical, true);
ec.MarkLabel(label_end);
temp_critical.Release(ec);
}
static TypeSpec EmitCallInstance(EmitContext ec, Expression instance, TypeSpec declaringType, OpCode callOpcode)
{
var instance_type = instance.Type;
//
// Push the instance expression
//
if ((instance_type.IsStruct && (callOpcode == OpCodes.Callvirt || (callOpcode == OpCodes.Call && declaringType.IsStruct))) ||
instance_type.IsGenericParameter || declaringType.IsNullableType)
{
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
var iml = instance as IMemoryLocation;
if (iml != null)
{
iml.AddressOf(ec, AddressOp.Load);
}
else
{
LocalTemporary temp = new LocalTemporary(instance_type);
instance.Emit(ec);
temp.Store(ec);
temp.AddressOf(ec, AddressOp.Load);
temp.Release(ec);
}
return(ReferenceContainer.MakeType(ec.Module, instance_type));
}
if (instance_type.IsEnum || instance_type.IsStruct)
{
instance.Emit(ec);
ec.Emit(OpCodes.Box, instance_type);
return(ec.BuiltinTypes.Object);
}
instance.Emit(ec);
return(instance_type);
}
public void EmitLoad(EmitContext ec)
{
var instance_type = instance.Type;
//
// Push the instance expression
//
if (addressRequired)
{
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
var iml = instance as IMemoryLocation;
if (iml != null)
{
iml.AddressOf(ec, AddressOp.Load);
}
else
{
LocalTemporary temp = new LocalTemporary(instance_type);
instance.Emit(ec);
temp.Store(ec);
temp.AddressOf(ec, AddressOp.Load);
}
return;
}
instance.Emit(ec);
// Only to make verifier happy
if (instance_type.IsGenericParameter && !(instance is This) && TypeSpec.IsReferenceType(instance_type))
{
ec.Emit(OpCodes.Box, instance_type);
}
else if (instance_type.IsStructOrEnum)
{
ec.Emit(OpCodes.Box, instance_type);
}
}
//
// if `dup_args' is true, a copy of the arguments will be left
// on the stack and return value will contain an array of access
// expressions
// NOTE: It's caller responsibility is to release temporary variables
//
public virtual Expression[] Emit(EmitContext ec, bool dup_args)
{
Expression[] temps;
if (dup_args && Count != 0)
{
temps = new Expression [Count];
}
else
{
temps = null;
}
int i = 0;
LocalTemporary lt;
foreach (Argument a in args)
{
a.Emit(ec);
if (!dup_args)
{
continue;
}
if (a.Expr is Constant || a.Expr is This)
{
//
// No need to create a temporary variable for constants
//
temps[i] = a.Expr;
}
else
{
ec.Emit(OpCodes.Dup);
temps[i] = lt = new LocalTemporary(a.Type);
lt.Store(ec);
}
++i;
}
return(temps);
}
public void EmitToVariable(EmitContext ec)
{
var type = Expr.Type;
if (IsByRef)
{
var ml = (IMemoryLocation)Expr;
ml.AddressOf(ec, AddressOp.LoadStore);
type = ReferenceContainer.MakeType(ec.Module, type);
}
else
{
Expr.Emit(ec);
}
variable = new LocalTemporary(type);
variable.Store(ec);
Expr = variable;
}
public void EmitLoad(EmitContext ec, bool boxInstance)
{
var instance_type = instance.Type;
//
// Push the instance expression
//
if (addressRequired)
{
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
var iml = instance as IMemoryLocation;
if (iml != null)
{
iml.AddressOf(ec, AddressOp.Load);
}
else
{
LocalTemporary temp = new LocalTemporary(instance_type);
instance.Emit(ec);
temp.Store(ec);
temp.AddressOf(ec, AddressOp.Load);
}
return;
}
instance.Emit(ec);
// Only to make verifier happy
if (boxInstance && RequiresBoxing())
{
ec.Emit(OpCodes.Box, instance_type);
}
}
public void EmitAssign (EmitContext ec)
{
var type = Expr.Type;
if (IsByRef) {
var ml = (IMemoryLocation) Expr;
ml.AddressOf (ec, AddressOp.Load);
type = ReferenceContainer.MakeType (type);
} else {
Expr.Emit (ec);
}
variable = new LocalTemporary (type);
variable.Store (ec);
Expr = variable;
}
protected virtual IMemoryLocation EmitAddressOf (EmitContext ec, AddressOp mode)
{
LocalTemporary value_target = new LocalTemporary (type);
if (is_type_parameter) {
DoEmitTypeParameter (ec);
value_target.Store (ec);
value_target.AddressOf (ec, mode);
return value_target;
}
if (!TypeManager.IsStruct (type)){
//
// We throw an exception. So far, I believe we only need to support
// value types:
// foreach (int j in new StructType ())
// see bug 42390
//
throw new Exception ("AddressOf should not be used for classes");
}
value_target.AddressOf (ec, AddressOp.Store);
if (method == null) {
ec.ig.Emit (OpCodes.Initobj, type);
} else {
if (Arguments != null)
Arguments.Emit (ec);
ec.ig.Emit (OpCodes.Call, (ConstructorInfo) method);
}
value_target.AddressOf (ec, mode);
return value_target;
}
public void EmitPredefined (EmitContext ec, MethodSpec method, Arguments Arguments, bool statement = false, Location? loc = null)
{
Expression instance_copy = null;
if (!HasAwaitArguments && ec.HasSet (BuilderContext.Options.AsyncBody)) {
HasAwaitArguments = Arguments != null && Arguments.ContainsEmitWithAwait ();
if (HasAwaitArguments && InstanceExpressionOnStack) {
throw new NotSupportedException ();
}
}
OpCode call_op;
LocalTemporary lt = null;
if (method.IsStatic) {
call_op = OpCodes.Call;
} else {
call_op = IsVirtualCallRequired (InstanceExpression, method) ? OpCodes.Callvirt : OpCodes.Call;
if (HasAwaitArguments) {
instance_copy = InstanceExpression.EmitToField (ec);
var ie = new InstanceEmitter (instance_copy, IsAddressCall (instance_copy, call_op, method.DeclaringType));
if (Arguments == null) {
ie.EmitLoad (ec, true);
}
} else if (!InstanceExpressionOnStack) {
var ie = new InstanceEmitter (InstanceExpression, IsAddressCall (InstanceExpression, call_op, method.DeclaringType));
ie.Emit (ec, ConditionalAccess);
if (DuplicateArguments) {
ec.Emit (OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0) {
lt = new LocalTemporary (ie.GetStackType (ec));
lt.Store (ec);
instance_copy = lt;
}
}
}
}
if (Arguments != null && !InstanceExpressionOnStack) {
EmittedArguments = Arguments.Emit (ec, DuplicateArguments, HasAwaitArguments);
if (EmittedArguments != null) {
if (instance_copy != null) {
var ie = new InstanceEmitter (instance_copy, IsAddressCall (instance_copy, call_op, method.DeclaringType));
ie.Emit (ec, ConditionalAccess);
if (lt != null)
lt.Release (ec);
}
EmittedArguments.Emit (ec);
}
}
if (call_op == OpCodes.Callvirt && (InstanceExpression.Type.IsGenericParameter || InstanceExpression.Type.IsStructOrEnum)) {
ec.Emit (OpCodes.Constrained, InstanceExpression.Type);
}
if (loc != null) {
//
// Emit explicit sequence point for expressions like Foo.Bar () to help debugger to
// break at right place when LHS expression can be stepped-into
//
ec.MarkCallEntry (loc.Value);
}
//
// Set instance expression to actual result expression. When it contains await it can be
// picked up by caller
//
InstanceExpression = instance_copy;
if (method.Parameters.HasArglist) {
var varargs_types = GetVarargsTypes (method, Arguments);
ec.Emit (call_op, method, varargs_types);
} else {
//
// If you have:
// this.DoFoo ();
// and DoFoo is not virtual, you can omit the callvirt,
// because you don't need the null checking behavior.
//
ec.Emit (call_op, method);
}
//
// Pop the return value if there is one and stack should be empty
//
if (statement && method.ReturnType.Kind != MemberKind.Void)
ec.Emit (OpCodes.Pop);
}
//
// if `dup_args' is true, a copy of the arguments will be left
// on the stack and return value will contain an array of access
// expressions
// NOTE: It's caller responsibility is to release temporary variables
//
public virtual Expression[] Emit (EmitContext ec, bool dup_args)
{
Expression[] temps;
if (dup_args && Count != 0)
temps = new Expression [Count];
else
temps = null;
int i = 0;
LocalTemporary lt;
foreach (Argument a in args) {
a.Emit (ec);
if (!dup_args)
continue;
if (a.Expr is Constant || a.Expr is This) {
//
// No need to create a temporary variable for constants
//
temps[i] = a.Expr;
} else {
ec.Emit (OpCodes.Dup);
temps[i] = lt = new LocalTemporary (a.Type);
lt.Store (ec);
}
++i;
}
return temps;
}
static TypeSpec EmitCallInstance (EmitContext ec, Expression instance, TypeSpec declaringType, OpCode callOpcode)
{
var instance_type = instance.Type;
//
// Push the instance expression
//
if ((instance_type.IsStructOrEnum && (callOpcode == OpCodes.Callvirt || (callOpcode == OpCodes.Call && declaringType.IsStruct))) ||
instance_type.IsGenericParameter || declaringType.IsNullableType) {
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
var iml = instance as IMemoryLocation;
if (iml != null) {
iml.AddressOf (ec, AddressOp.Load);
} else {
LocalTemporary temp = new LocalTemporary (instance_type);
instance.Emit (ec);
temp.Store (ec);
temp.AddressOf (ec, AddressOp.Load);
}
return ReferenceContainer.MakeType (ec.Module, instance_type);
}
if (instance_type.IsStructOrEnum) {
instance.Emit (ec);
ec.Emit (OpCodes.Box, instance_type);
return ec.BuiltinTypes.Object;
}
instance.Emit (ec);
return instance_type;
}
public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
FieldAttributes fa = FieldInfo.Attributes;
bool is_static = (fa & FieldAttributes.Static) != 0;
bool is_readonly = (fa & FieldAttributes.InitOnly) != 0;
ILGenerator ig = ec.ig;
if (is_readonly && !ec.IsConstructor){
Report_AssignToReadonly (source);
return;
}
prepared = prepare_for_load;
EmitInstance (ec, prepared);
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
if (!FieldInfo.IsStatic) {
temp = new LocalTemporary (this.Type);
temp.Store (ec);
}
}
FieldBase f = TypeManager.GetField (FieldInfo);
if (f != null){
if ((f.ModFlags & Modifiers.VOLATILE) != 0)
ig.Emit (OpCodes.Volatile);
f.SetAssigned ();
}
if (is_static)
ig.Emit (OpCodes.Stsfld, GetConstructedFieldInfo ());
else
ig.Emit (OpCodes.Stfld, GetConstructedFieldInfo ());
if (temp != null) {
temp.Emit (ec);
temp.Release (ec);
temp = null;
}
}
//
// Initializes all hoisted variables
//
public void EmitStoreyInstantiation (EmitContext ec)
{
// There can be only one instance variable for each storey type
if (Instance != null)
throw new InternalErrorException ();
SymbolWriter.OpenCompilerGeneratedBlock (ec);
//
// Create an instance of a storey
//
var storey_type_expr = CreateStoreyTypeExpression (ec);
ResolveContext rc = new ResolveContext (ec.MemberContext);
Expression e = new New (storey_type_expr, null, Location).Resolve (rc);
e.Emit (ec);
Instance = new LocalTemporary (storey_type_expr.Type);
Instance.Store (ec);
EmitHoistedFieldsInitialization (ec);
SymbolWriter.DefineScopeVariable (ID, Instance.Builder);
SymbolWriter.CloseCompilerGeneratedBlock (ec);
}
protected void EmitInstance (EmitContext ec, bool prepare_for_load)
{
if (IsStatic)
return;
if (InstanceExpression == EmptyExpression.Null) {
SimpleName.Error_ObjectRefRequired (ec, loc, GetSignatureForError ());
return;
}
if (InstanceExpression.Type.IsValueType) {
if (InstanceExpression is IMemoryLocation) {
((IMemoryLocation) InstanceExpression).AddressOf (ec, AddressOp.LoadStore);
} else {
LocalTemporary t = new LocalTemporary (InstanceExpression.Type);
InstanceExpression.Emit (ec);
t.Store (ec);
t.AddressOf (ec, AddressOp.Store);
}
} else
InstanceExpression.Emit (ec);
if (prepare_for_load)
ec.ig.Emit (OpCodes.Dup);
}
public void Emit (EmitContext ec, bool leave_copy)
{
ILGenerator ig = ec.ig;
bool is_volatile = false;
FieldBase f = TypeManager.GetField (FieldInfo);
if (f != null){
if ((f.ModFlags & Modifiers.VOLATILE) != 0)
is_volatile = true;
f.SetMemberIsUsed ();
}
if (FieldInfo.IsStatic){
if (is_volatile)
ig.Emit (OpCodes.Volatile);
ig.Emit (OpCodes.Ldsfld, GetConstructedFieldInfo ());
} else {
if (!prepared)
EmitInstance (ec, false);
IFixedBuffer ff = AttributeTester.GetFixedBuffer (FieldInfo);
if (ff != null) {
ig.Emit (OpCodes.Ldflda, GetConstructedFieldInfo ());
ig.Emit (OpCodes.Ldflda, ff.Element);
} else {
if (is_volatile)
ig.Emit (OpCodes.Volatile);
ig.Emit (OpCodes.Ldfld, GetConstructedFieldInfo ());
}
}
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
if (!FieldInfo.IsStatic) {
temp = new LocalTemporary (this.Type);
temp.Store (ec);
}
}
}
public void EmitLoad (EmitContext ec)
{
var instance_type = instance.Type;
//
// Push the instance expression
//
if (addressRequired) {
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
var iml = instance as IMemoryLocation;
if (iml != null) {
iml.AddressOf (ec, AddressOp.Load);
} else {
LocalTemporary temp = new LocalTemporary (instance_type);
instance.Emit (ec);
temp.Store (ec);
temp.AddressOf (ec, AddressOp.Load);
}
return;
}
instance.Emit (ec);
// Only to make verifier happy
if (instance_type.IsGenericParameter && !(instance is This) && TypeSpec.IsReferenceType (instance_type)) {
ec.Emit (OpCodes.Box, instance_type);
} else if (instance_type.IsStructOrEnum) {
ec.Emit (OpCodes.Box, instance_type);
}
}
//
// Initializes all hoisted variables
//
public void EmitStoreyInstantiation (EmitContext ec)
{
// There can be only one instance variable for each storey type
if (Instance != null)
throw new InternalErrorException ();
SymbolWriter.OpenCompilerGeneratedBlock (ec.ig);
//
// Create an instance of storey type
//
Expression storey_type_expr;
if (is_generic) {
//
// Use current method type parameter (MVAR) for top level storey only. All
// nested storeys use class type parameter (VAR)
//
TypeParameter[] tparams = ec.CurrentAnonymousMethod != null && ec.CurrentAnonymousMethod.Storey != null ?
ec.CurrentAnonymousMethod.Storey.TypeParameters :
ec.CurrentTypeParameters;
TypeArguments targs = new TypeArguments ();
if (tparams.Length < CountTypeParameters) {
TypeParameter[] parent_tparams = ec.MemberContext.CurrentTypeDefinition.TypeParameters;
for (int i = 0; i < parent_tparams.Length; ++i)
targs.Add (new TypeParameterExpr (parent_tparams[i], Location));
}
for (int i = 0; i < tparams.Length; ++i)
targs.Add (new TypeParameterExpr (tparams[i], Location));
storey_type_expr = new GenericTypeExpr (TypeBuilder, targs, Location);
} else {
storey_type_expr = new TypeExpression (TypeBuilder, Location);
}
ResolveContext rc = new ResolveContext (this);
Expression e = new New (storey_type_expr, null, Location).Resolve (rc);
e.Emit (ec);
Instance = new LocalTemporary (storey_type_expr.Type);
Instance.Store (ec);
EmitHoistedFieldsInitialization (ec);
SymbolWriter.DefineScopeVariable (ID, Instance.Builder);
SymbolWriter.CloseCompilerGeneratedBlock (ec.ig);
}
//
// source is ignored, because we already have a copy of it from the
// LValue resolution and we have already constructed a pre-cached
// version of the arguments (ea.set_arguments);
//
public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
prepared = prepare_for_load;
Expression value = set_expr;
if (prepared) {
Invocation.EmitCall (ec, is_base_indexer, instance_expr, get,
arguments, loc, true, false);
prepared_value = new LocalTemporary (type);
prepared_value.Store (ec);
source.Emit (ec);
prepared_value.Release (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
temp = new LocalTemporary (Type);
temp.Store (ec);
}
} else if (leave_copy) {
temp = new LocalTemporary (Type);
source.Emit (ec);
temp.Store (ec);
value = temp;
}
if (!prepared)
arguments.Add (new Argument (value));
Invocation.EmitCall (ec, is_base_indexer, instance_expr, set, arguments, loc, false, prepared);
if (temp != null) {
temp.Emit (ec);
temp.Release (ec);
}
}
public void Emit (EmitContext ec, bool leave_copy)
{
if (prepared) {
prepared_value.Emit (ec);
} else {
Invocation.EmitCall (ec, is_base_indexer, instance_expr, get,
arguments, loc, false, false);
}
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
temp = new LocalTemporary (Type);
temp.Store (ec);
}
}
public void EmitPredefined (EmitContext ec, MethodSpec method, Arguments Arguments, Location? loc = null)
{
Expression instance_copy = null;
if (!HasAwaitArguments && ec.HasSet (BuilderContext.Options.AsyncBody)) {
HasAwaitArguments = Arguments != null && Arguments.ContainsEmitWithAwait ();
if (HasAwaitArguments && InstanceExpressionOnStack) {
throw new NotSupportedException ();
}
}
OpCode call_op;
LocalTemporary lt = null;
if (method.IsStatic) {
call_op = OpCodes.Call;
} else {
if (IsVirtualCallRequired (InstanceExpression, method)) {
call_op = OpCodes.Callvirt;
} else {
call_op = OpCodes.Call;
}
if (HasAwaitArguments) {
instance_copy = InstanceExpression.EmitToField (ec);
if (Arguments == null)
EmitCallInstance (ec, instance_copy, method.DeclaringType, call_op);
} else if (!InstanceExpressionOnStack) {
var instance_on_stack_type = EmitCallInstance (ec, InstanceExpression, method.DeclaringType, call_op);
if (DuplicateArguments) {
ec.Emit (OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0) {
lt = new LocalTemporary (instance_on_stack_type);
lt.Store (ec);
instance_copy = lt;
}
}
}
}
if (Arguments != null && !InstanceExpressionOnStack) {
EmittedArguments = Arguments.Emit (ec, DuplicateArguments, HasAwaitArguments);
if (EmittedArguments != null) {
if (instance_copy != null) {
EmitCallInstance (ec, instance_copy, method.DeclaringType, call_op);
if (lt != null)
lt.Release (ec);
}
EmittedArguments.Emit (ec);
}
}
if (call_op == OpCodes.Callvirt && (InstanceExpression.Type.IsGenericParameter || InstanceExpression.Type.IsStruct)) {
ec.Emit (OpCodes.Constrained, InstanceExpression.Type);
}
if (loc != null) {
//
// Emit explicit sequence point for expressions like Foo.Bar () to help debugger to
// break at right place when LHS expression can be stepped-into
//
// TODO: The list is probably not comprehensive, need to do more testing
//
if (InstanceExpression is PropertyExpr || InstanceExpression is Invocation || InstanceExpression is IndexerExpr ||
InstanceExpression is New || InstanceExpression is DelegateInvocation)
ec.Mark (loc.Value);
}
//
// Set instance expression to actual result expression. When it contains await it can be
// picked up by caller
//
InstanceExpression = instance_copy;
if (method.Parameters.HasArglist) {
var varargs_types = GetVarargsTypes (method, Arguments);
ec.Emit (call_op, method, varargs_types);
return;
}
//
// If you have:
// this.DoFoo ();
// and DoFoo is not virtual, you can omit the callvirt,
// because you don't need the null checking behavior.
//
ec.Emit (call_op, method);
}
protected override void DoEmit (EmitContext ec)
{
if (IsGeneral)
ec.BeginCatchBlock (TypeManager.object_type);
else
ec.BeginCatchBlock (CatchType);
if (li != null) {
li.CreateBuilder (ec);
//
// Special case hoisted catch variable, we have to use a temporary variable
// to pass via anonymous storey initialization with the value still on top
// of the stack
//
if (li.HoistedVariant != null) {
LocalTemporary lt = new LocalTemporary (li.Type);
SymbolWriter.OpenCompilerGeneratedBlock (ec);
lt.Store (ec);
SymbolWriter.CloseCompilerGeneratedBlock (ec);
// switch to assigning from the temporary variable and not from top of the stack
assign.UpdateSource (lt);
}
} else {
SymbolWriter.OpenCompilerGeneratedBlock (ec);
ec.Emit (OpCodes.Pop);
SymbolWriter.CloseCompilerGeneratedBlock (ec);
}
Block.Emit (ec);
}
public void Emit(EmitContext ec, bool leave_copy)
{
bool is_volatile = false;
if ((spec.Modifiers & Modifiers.VOLATILE) != 0)
is_volatile = true;
spec.MemberDefinition.SetIsUsed ();
if (IsStatic){
if (is_volatile)
ec.Emit (OpCodes.Volatile);
ec.Emit (OpCodes.Ldsfld, spec);
} else {
if (!prepared)
EmitInstance (ec, false);
// Optimization for build-in types
if (TypeManager.IsStruct (type) && TypeManager.IsEqual (type, ec.MemberContext.CurrentType) && TypeManager.IsEqual (InstanceExpression.Type, type)) {
ec.EmitLoadFromPtr (type);
} else {
var ff = spec as FixedFieldSpec;
if (ff != null) {
ec.Emit (OpCodes.Ldflda, spec);
ec.Emit (OpCodes.Ldflda, ff.Element);
} else {
if (is_volatile)
ec.Emit (OpCodes.Volatile);
ec.Emit (OpCodes.Ldfld, spec);
}
}
}
if (leave_copy) {
ec.Emit (OpCodes.Dup);
if (!IsStatic) {
temp = new LocalTemporary (this.Type);
temp.Store (ec);
}
}
}
public void Emit (EmitContext ec, bool leave_copy)
{
int rank = ea.Expr.Type.GetArrayRank ();
ILGenerator ig = ec.ig;
if (prepared) {
LoadFromPtr (ig, this.type);
} else {
LoadArrayAndArguments (ec);
EmitLoadOpcode (ig, type, rank);
}
if (leave_copy) {
ig.Emit (OpCodes.Dup);
temp = new LocalTemporary (this.type);
temp.Store (ec);
}
}
public void EmitAssign(EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
prepared = prepare_for_load;
EmitInstance (ec, prepared);
source.Emit (ec);
if (leave_copy) {
ec.Emit (OpCodes.Dup);
if (!IsStatic) {
temp = new LocalTemporary (this.Type);
temp.Store (ec);
}
}
if ((spec.Modifiers & Modifiers.VOLATILE) != 0)
ec.Emit (OpCodes.Volatile);
spec.MemberDefinition.SetIsAssigned ();
if (IsStatic)
ec.Emit (OpCodes.Stsfld, spec);
else
ec.Emit (OpCodes.Stfld, spec);
if (temp != null) {
temp.Emit (ec);
temp.Release (ec);
temp = null;
}
}
public void EmitPredefined (EmitContext ec, MethodSpec method, Arguments Arguments)
{
Expression instance_copy = null;
if (!HasAwaitArguments && ec.HasSet (BuilderContext.Options.AsyncBody)) {
HasAwaitArguments = Arguments != null && Arguments.ContainsEmitWithAwait ();
if (HasAwaitArguments && InstanceExpressionOnStack) {
throw new NotSupportedException ();
}
}
OpCode call_op;
LocalTemporary lt = null;
if (method.IsStatic) {
call_op = OpCodes.Call;
} else {
if (IsVirtualCallRequired (InstanceExpression, method)) {
call_op = OpCodes.Callvirt;
} else {
call_op = OpCodes.Call;
}
if (HasAwaitArguments) {
instance_copy = InstanceExpression.EmitToField (ec);
if (Arguments == null)
EmitCallInstance (ec, instance_copy, method.DeclaringType, call_op);
} else if (!InstanceExpressionOnStack) {
var instance_on_stack_type = EmitCallInstance (ec, InstanceExpression, method.DeclaringType, call_op);
if (DuplicateArguments) {
ec.Emit (OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0) {
lt = new LocalTemporary (instance_on_stack_type);
lt.Store (ec);
instance_copy = lt;
}
}
}
}
if (Arguments != null && !InstanceExpressionOnStack) {
EmittedArguments = Arguments.Emit (ec, DuplicateArguments, HasAwaitArguments);
if (EmittedArguments != null) {
if (instance_copy != null) {
EmitCallInstance (ec, instance_copy, method.DeclaringType, call_op);
if (lt != null)
lt.Release (ec);
}
EmittedArguments.Emit (ec);
}
}
if (call_op == OpCodes.Callvirt && (InstanceExpression.Type.IsGenericParameter || InstanceExpression.Type.IsStruct)) {
ec.Emit (OpCodes.Constrained, InstanceExpression.Type);
}
//
// Set instance expression to actual result expression. When it contains await it can be
// picked up by caller
//
InstanceExpression = instance_copy;
if (method.Parameters.HasArglist) {
var varargs_types = GetVarargsTypes (method, Arguments);
ec.Emit (call_op, method, varargs_types);
return;
}
//
// If you have:
// this.DoFoo ();
// and DoFoo is not virtual, you can omit the callvirt,
// because you don't need the null checking behavior.
//
ec.Emit (call_op, method);
}
protected void EmitInstance(EmitContext ec, bool prepare_for_load)
{
if (IsStatic)
return;
if (InstanceExpression == EmptyExpression.Null) {
// FIXME: This should not be here at all
SimpleName.Error_ObjectRefRequired (new ResolveContext (ec.MemberContext), loc, GetSignatureForError ());
return;
}
if (TypeManager.IsValueType (InstanceExpression.Type)) {
if (InstanceExpression is IMemoryLocation) {
((IMemoryLocation) InstanceExpression).AddressOf (ec, AddressOp.LoadStore);
} else {
LocalTemporary t = new LocalTemporary (InstanceExpression.Type);
InstanceExpression.Emit (ec);
t.Store (ec);
t.AddressOf (ec, AddressOp.Store);
}
} else
InstanceExpression.Emit (ec);
if (prepare_for_load)
ec.Emit (OpCodes.Dup);
}
public void EmitPredefined(EmitContext ec, MethodSpec method, Arguments Arguments, bool statement = false, Location?loc = null)
{
Expression instance_copy = null;
if (!HasAwaitArguments && ec.HasSet(BuilderContext.Options.AsyncBody))
{
HasAwaitArguments = Arguments != null && Arguments.ContainsEmitWithAwait();
if (HasAwaitArguments && InstanceExpressionOnStack)
{
throw new NotSupportedException();
}
}
OpCode call_op;
LocalTemporary lt = null;
InstanceEmitter ie = new InstanceEmitter();
if (method.IsStatic)
{
call_op = OpCodes.Call;
}
else
{
if (IsVirtualCallRequired(InstanceExpression, method))
{
call_op = OpCodes.Callvirt;
}
else
{
call_op = OpCodes.Call;
}
if (HasAwaitArguments)
{
instance_copy = InstanceExpression.EmitToField(ec);
ie = new InstanceEmitter(instance_copy, IsAddressCall(instance_copy, call_op, method.DeclaringType));
if (Arguments == null)
{
ie.EmitLoad(ec);
}
}
else if (!InstanceExpressionOnStack)
{
ie = new InstanceEmitter(InstanceExpression, IsAddressCall(InstanceExpression, call_op, method.DeclaringType));
ie.NullShortCircuit = NullShortCircuit;
ie.Emit(ec);
if (NullShortCircuit)
{
NullOperatorLabel = ie.NullOperatorLabel;
}
if (DuplicateArguments)
{
ec.Emit(OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0)
{
lt = new LocalTemporary(ie.GetStackType(ec));
lt.Store(ec);
instance_copy = lt;
}
}
}
}
if (Arguments != null && !InstanceExpressionOnStack)
{
EmittedArguments = Arguments.Emit(ec, DuplicateArguments, HasAwaitArguments);
if (EmittedArguments != null)
{
if (instance_copy != null)
{
ie = new InstanceEmitter(instance_copy, IsAddressCall(instance_copy, call_op, method.DeclaringType));
ie.Emit(ec);
if (lt != null)
{
lt.Release(ec);
}
}
EmittedArguments.Emit(ec);
}
}
if (call_op == OpCodes.Callvirt && (InstanceExpression.Type.IsGenericParameter || InstanceExpression.Type.IsStructOrEnum))
{
ec.Emit(OpCodes.Constrained, InstanceExpression.Type);
}
if (loc != null)
{
//
// Emit explicit sequence point for expressions like Foo.Bar () to help debugger to
// break at right place when LHS expression can be stepped-into
//
ec.MarkCallEntry(loc.Value);
}
//
// Set instance expression to actual result expression. When it contains await it can be
// picked up by caller
//
InstanceExpression = instance_copy;
if (method.Parameters.HasArglist)
{
var varargs_types = GetVarargsTypes(method, Arguments);
ec.Emit(call_op, method, varargs_types);
}
else
{
//
// If you have:
// this.DoFoo ();
// and DoFoo is not virtual, you can omit the callvirt,
// because you don't need the null checking behavior.
//
ec.Emit(call_op, method);
}
//
// Pop the return value if there is one and stack should be empty
//
if (statement && method.ReturnType.Kind != MemberKind.Void)
{
ec.Emit(OpCodes.Pop);
}
if (NullShortCircuit && !DuplicateArguments)
{
ie.EmitResultLift(ec, method.ReturnType, statement);
}
}
public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
int rank = ea.Expr.Type.GetArrayRank ();
ILGenerator ig = ec.ig;
Type t = source.Type;
prepared = prepare_for_load;
if (prepared) {
AddressOf (ec, AddressOp.LoadStore);
ec.ig.Emit (OpCodes.Dup);
} else {
LoadArrayAndArguments (ec);
}
if (rank == 1) {
bool is_stobj, has_type_arg;
OpCode op = GetStoreOpcode (t, out is_stobj, out has_type_arg);
if (!prepared) {
//
// The stobj opcode used by value types will need
// an address on the stack, not really an array/array
// pair
//
if (is_stobj)
ig.Emit (OpCodes.Ldelema, t);
}
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
temp = new LocalTemporary (this.type);
temp.Store (ec);
}
if (prepared)
StoreFromPtr (ig, t);
else if (is_stobj)
ig.Emit (OpCodes.Stobj, t);
else if (has_type_arg)
ig.Emit (op, t);
else
ig.Emit (op);
} else {
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
temp = new LocalTemporary (this.type);
temp.Store (ec);
}
if (prepared) {
StoreFromPtr (ig, t);
} else {
int arg_count = ea.Arguments.Count;
Type [] args = new Type [arg_count + 1];
for (int i = 0; i < arg_count; i++) {
//args [i++] = a.Type;
args [i] = TypeManager.int32_type;
}
args [arg_count] = type;
MethodInfo set = RootContext.ToplevelTypes.Builder.GetArrayMethod (
ea.Expr.Type, "Set",
CallingConventions.HasThis |
CallingConventions.Standard,
TypeManager.void_type, args);
ig.Emit (OpCodes.Call, set);
}
}
if (temp != null) {
temp.Emit (ec);
temp.Release (ec);
}
}
//
// if `dup_args' is true or any of arguments contains await.
// A copy of all arguments will be returned to the caller
//
public virtual Arguments Emit (EmitContext ec, bool dup_args, bool prepareAwait)
{
List<Argument> dups;
if ((dup_args && Count != 0) || prepareAwait)
dups = new List<Argument> (Count);
else
dups = null;
LocalTemporary lt;
foreach (Argument a in args) {
if (prepareAwait) {
dups.Add (a.EmitToField (ec, true));
continue;
}
a.Emit (ec);
if (!dup_args) {
continue;
}
if (a.Expr.IsSideEffectFree) {
//
// No need to create a temporary variable for side effect free expressions. I assume
// all side-effect free expressions are cheap, this has to be tweaked when we become
// more aggressive on detection
//
dups.Add (a);
} else {
ec.Emit (OpCodes.Dup);
// TODO: Release local temporary on next Emit
// Need to add a flag to argument to indicate this
lt = new LocalTemporary (a.Type);
lt.Store (ec);
dups.Add (new Argument (lt, a.ArgType));
}
}
if (dups != null)
return new Arguments (dups);
return null;
}
public void Emit (EmitContext ec, bool leave_copy)
{
Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
temporary = new LocalTemporary (expr.Type);
temporary.Store (ec);
}
}
public void EmitLoad (EmitContext ec, bool boxInstance)
{
var instance_type = instance.Type;
//
// Push the instance expression
//
if (addressRequired) {
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
var iml = instance as IMemoryLocation;
if (iml != null) {
iml.AddressOf (ec, AddressOp.Load);
} else {
LocalTemporary temp = new LocalTemporary (instance_type);
instance.Emit (ec);
temp.Store (ec);
temp.AddressOf (ec, AddressOp.Load);
}
return;
}
instance.Emit (ec);
// Only to make verifier happy
if (boxInstance && RequiresBoxing ()) {
ec.Emit (OpCodes.Box, instance_type);
}
}
protected override void DoEmit (EmitContext ec)
{
if (CatchType != null)
ec.BeginCatchBlock (CatchType);
else
ec.BeginCatchBlock (TypeManager.object_type);
if (VarBlock != null)
VarBlock.Emit (ec);
if (Name != null) {
// TODO: Move to resolve
LocalVariableReference lvr = new LocalVariableReference (Block, Name, loc);
lvr.Resolve (new ResolveContext (ec.MemberContext));
// Only to make verifier happy
if (TypeManager.IsGenericParameter (lvr.Type))
ec.Emit (OpCodes.Unbox_Any, lvr.Type);
Expression source;
if (lvr.IsHoisted) {
LocalTemporary lt = new LocalTemporary (lvr.Type);
lt.Store (ec);
source = lt;
} else {
// Variable is at the top of the stack
source = EmptyExpression.Null;
}
lvr.EmitAssign (ec, source, false, false);
} else
ec.Emit (OpCodes.Pop);
Block.Emit (ec);
}
// `dup_args' leaves an extra copy of the arguments on the stack
// `omit_args' does not leave any arguments at all.
// So, basically, you could make one call with `dup_args' set to true,
// and then another with `omit_args' set to true, and the two calls
// would have the same set of arguments. However, each argument would
// only have been evaluated once.
public static void EmitCall (EmitContext ec, bool is_base,
Expression instance_expr,
MethodBase method, Arguments Arguments, Location loc,
bool dup_args, bool omit_args)
{
ILGenerator ig = ec.ig;
bool struct_call = false;
bool this_call = false;
LocalTemporary this_arg = null;
Type decl_type = method.DeclaringType;
if (IsMethodExcluded (method, loc))
return;
bool is_static = method.IsStatic;
if (!is_static){
this_call = instance_expr is This;
if (TypeManager.IsStruct (decl_type) || TypeManager.IsEnumType (decl_type))
struct_call = true;
//
// If this is ourselves, push "this"
//
if (!omit_args) {
Type t = null;
Type iexpr_type = instance_expr.Type;
//
// Push the instance expression
//
if (TypeManager.IsValueType (iexpr_type) || TypeManager.IsGenericParameter (iexpr_type)) {
//
// Special case: calls to a function declared in a
// reference-type with a value-type argument need
// to have their value boxed.
if (TypeManager.IsStruct (decl_type) ||
TypeManager.IsGenericParameter (iexpr_type)) {
//
// If the expression implements IMemoryLocation, then
// we can optimize and use AddressOf on the
// return.
//
// If not we have to use some temporary storage for
// it.
if (instance_expr is IMemoryLocation) {
((IMemoryLocation)instance_expr).
AddressOf (ec, AddressOp.LoadStore);
} else {
LocalTemporary temp = new LocalTemporary (iexpr_type);
instance_expr.Emit (ec);
temp.Store (ec);
temp.AddressOf (ec, AddressOp.Load);
}
// avoid the overhead of doing this all the time.
if (dup_args)
t = TypeManager.GetReferenceType (iexpr_type);
} else {
instance_expr.Emit (ec);
// FIXME: should use instance_expr is IMemoryLocation + constraint.
// to help JIT to produce better code
ig.Emit (OpCodes.Box, instance_expr.Type);
t = TypeManager.object_type;
}
} else {
instance_expr.Emit (ec);
t = instance_expr.Type;
}
if (dup_args) {
ig.Emit (OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0) {
this_arg = new LocalTemporary (t);
this_arg.Store (ec);
}
}
}
}
if (!omit_args && Arguments != null)
Arguments.Emit (ec, dup_args, this_arg);
OpCode call_op;
if (is_static || struct_call || is_base || (this_call && !method.IsVirtual)) {
call_op = OpCodes.Call;
} else {
call_op = OpCodes.Callvirt;
#if GMCS_SOURCE
if ((instance_expr != null) && (instance_expr.Type.IsGenericParameter))
ig.Emit (OpCodes.Constrained, instance_expr.Type);
#endif
}
if ((method.CallingConvention & CallingConventions.VarArgs) != 0) {
Type[] varargs_types = GetVarargsTypes (method, Arguments);
ig.EmitCall (call_op, (MethodInfo) method, varargs_types);
return;
}
//
// If you have:
// this.DoFoo ();
// and DoFoo is not virtual, you can omit the callvirt,
// because you don't need the null checking behavior.
//
if (method is MethodInfo)
ig.Emit (call_op, (MethodInfo) method);
else
ig.Emit (call_op, (ConstructorInfo) method);
}
protected override void DoEmit (EmitContext ec)
{
//
// Needed to emit anonymous storey initialization
// Otherwise it does not contain any statements for now
//
block.Emit (ec);
default_target = ec.DefineLabel ();
null_target = ec.DefineLabel ();
// Store variable for comparission purposes
// TODO: Don't duplicate non-captured VariableReference
LocalTemporary value;
if (HaveUnwrap) {
value = new LocalTemporary (SwitchType);
unwrap.EmitCheck (ec);
ec.Emit (OpCodes.Brfalse, null_target);
new_expr.Emit (ec);
value.Store (ec);
} else if (!is_constant) {
value = new LocalTemporary (SwitchType);
new_expr.Emit (ec);
value.Store (ec);
} else
value = null;
//
// Setup the codegen context
//
Label old_end = ec.LoopEnd;
Switch old_switch = ec.Switch;
ec.LoopEnd = ec.DefineLabel ();
ec.Switch = this;
// Emit Code.
if (is_constant) {
if (constant_section != null)
constant_section.Block.Emit (ec);
} else if (string_dictionary != null) {
DoEmitStringSwitch (value, ec);
} else {
TableSwitchEmit (ec, value);
}
if (value != null)
value.Release (ec);
// Restore context state.
ec.MarkLabel (ec.LoopEnd);
//
// Restore the previous context
//
ec.LoopEnd = old_end;
ec.Switch = old_switch;
}
public void Emit(EmitContext ec, bool leave_copy)
{
//
// Special case: length of single dimension array property is turned into ldlen
//
if (IsSingleDimensionalArrayLength ()) {
if (!prepared)
EmitInstance (ec, false);
ec.Emit (OpCodes.Ldlen);
ec.Emit (OpCodes.Conv_I4);
return;
}
Invocation.EmitCall (ec, IsBase, InstanceExpression, spec.Get, null, loc, prepared, false);
if (leave_copy) {
ec.Emit (OpCodes.Dup);
if (!IsStatic) {
temp = new LocalTemporary (this.Type);
temp.Store (ec);
}
}
}
public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
prepared = prepare_for_load;
expr.Emit (ec);
if (prepare_for_load)
ec.ig.Emit (OpCodes.Dup);
source.Emit (ec);
if (leave_copy) {
ec.ig.Emit (OpCodes.Dup);
temporary = new LocalTemporary (expr.Type);
temporary.Store (ec);
}
StoreFromPtr (ec.ig, type);
if (temporary != null) {
temporary.Emit (ec);
temporary.Release (ec);
}
}
public void EmitPredefined(EmitContext ec, MethodSpec method, Arguments Arguments, Location?loc = null)
{
Expression instance_copy = null;
if (!HasAwaitArguments && ec.HasSet(BuilderContext.Options.AsyncBody))
{
HasAwaitArguments = Arguments != null && Arguments.ContainsEmitWithAwait();
if (HasAwaitArguments && InstanceExpressionOnStack)
{
throw new NotSupportedException();
}
}
OpCode call_op;
LocalTemporary lt = null;
if (method.IsStatic)
{
call_op = OpCodes.Call;
}
else
{
if (IsVirtualCallRequired(InstanceExpression, method))
{
call_op = OpCodes.Callvirt;
}
else
{
call_op = OpCodes.Call;
}
if (HasAwaitArguments)
{
instance_copy = InstanceExpression.EmitToField(ec);
if (Arguments == null)
{
EmitCallInstance(ec, instance_copy, method.DeclaringType, call_op);
}
}
else if (!InstanceExpressionOnStack)
{
var instance_on_stack_type = EmitCallInstance(ec, InstanceExpression, method.DeclaringType, call_op);
if (DuplicateArguments)
{
ec.Emit(OpCodes.Dup);
if (Arguments != null && Arguments.Count != 0)
{
lt = new LocalTemporary(instance_on_stack_type);
lt.Store(ec);
instance_copy = lt;
}
}
}
}
if (Arguments != null && !InstanceExpressionOnStack)
{
EmittedArguments = Arguments.Emit(ec, DuplicateArguments, HasAwaitArguments);
if (EmittedArguments != null)
{
if (instance_copy != null)
{
EmitCallInstance(ec, instance_copy, method.DeclaringType, call_op);
if (lt != null)
{
lt.Release(ec);
}
}
EmittedArguments.Emit(ec);
}
}
if (call_op == OpCodes.Callvirt && (InstanceExpression.Type.IsGenericParameter || InstanceExpression.Type.IsStructOrEnum))
{
ec.Emit(OpCodes.Constrained, InstanceExpression.Type);
}
if (loc != null)
{
//
// Emit explicit sequence point for expressions like Foo.Bar () to help debugger to
// break at right place when LHS expression can be stepped-into
//
ec.MarkCallEntry(loc.Value);
}
//
// Set instance expression to actual result expression. When it contains await it can be
// picked up by caller
//
InstanceExpression = instance_copy;
if (method.Parameters.HasArglist)
{
var varargs_types = GetVarargsTypes(method, Arguments);
ec.Emit(call_op, method, varargs_types);
return;
}
//
// If you have:
// this.DoFoo ();
// and DoFoo is not virtual, you can omit the callvirt,
// because you don't need the null checking behavior.
//
ec.Emit(call_op, method);
}
//
// Implements the IAssignMethod interface for assignments
//
public void EmitAssign(EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
Expression my_source = source;
if (prepare_for_load) {
prepared = true;
source.Emit (ec);
if (leave_copy) {
ec.Emit (OpCodes.Dup);
if (!IsStatic) {
temp = new LocalTemporary (this.Type);
temp.Store (ec);
}
}
} else if (leave_copy) {
source.Emit (ec);
temp = new LocalTemporary (this.Type);
temp.Store (ec);
my_source = temp;
}
Arguments args = new Arguments (1);
args.Add (new Argument (my_source));
Invocation.EmitCall (ec, IsBase, InstanceExpression, spec.Set, args, loc, false, prepared);
if (temp != null) {
temp.Emit (ec);
temp.Release (ec);
}
}
