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public FreeTemporaryLocal ( |
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| b | ||
| t | System.TypeSpec | |
| Résultat | void | |
public void Emit(EmitContext ec)
{
Nullable.Unwrap unwrap;
if (NullShortCircuit)
{
NullOperatorLabel = ec.DefineLabel();
unwrap = instance as Nullable.Unwrap;
}
else
{
unwrap = null;
}
if (unwrap != null)
{
unwrap.Store(ec);
unwrap.EmitCheck(ec);
ec.Emit(OpCodes.Brfalse, NullOperatorLabel);
unwrap.Emit(ec);
var tmp = ec.GetTemporaryLocal(unwrap.Type);
ec.Emit(OpCodes.Stloc, tmp);
ec.Emit(OpCodes.Ldloca, tmp);
ec.FreeTemporaryLocal(tmp, unwrap.Type);
return;
}
EmitLoad(ec);
if (NullShortCircuit)
{
ec.Emit(OpCodes.Dup);
ec.Emit(OpCodes.Brfalse, NullOperatorLabel);
}
value_on_stack = true;
}
public void Emit(EmitContext ec, bool conditionalAccess)
{
Label NullOperatorLabel;
Nullable.Unwrap unwrap;
if (conditionalAccess && Expression.IsNeverNull(instance))
{
conditionalAccess = false;
}
if (conditionalAccess)
{
NullOperatorLabel = ec.DefineLabel();
unwrap = instance as Nullable.Unwrap;
}
else
{
NullOperatorLabel = new Label();
unwrap = null;
}
IMemoryLocation instance_address = null;
bool conditional_access_dup = false;
if (unwrap != null)
{
unwrap.Store(ec);
unwrap.EmitCheck(ec);
ec.Emit(OpCodes.Brtrue_S, NullOperatorLabel);
}
else
{
if (conditionalAccess && addressRequired)
{
//
// Don't allocate temp variable when instance load is cheap and load and load-address
// operate on same memory
//
instance_address = instance as VariableReference;
if (instance_address == null)
{
instance_address = instance as LocalTemporary;
}
if (instance_address == null)
{
EmitLoad(ec, false);
ec.Emit(OpCodes.Dup);
ec.EmitLoadFromPtr(instance.Type);
conditional_access_dup = true;
}
else
{
instance.Emit(ec);
}
}
else
{
EmitLoad(ec, !conditionalAccess);
if (conditionalAccess)
{
conditional_access_dup = !IsInexpensiveLoad();
if (conditional_access_dup)
{
ec.Emit(OpCodes.Dup);
}
}
}
if (conditionalAccess)
{
if (instance.Type.Kind == MemberKind.TypeParameter)
{
ec.Emit(OpCodes.Box, instance.Type);
}
ec.Emit(OpCodes.Brtrue_S, NullOperatorLabel);
if (conditional_access_dup)
{
ec.Emit(OpCodes.Pop);
}
}
}
if (conditionalAccess)
{
if (!ec.ConditionalAccess.Statement)
{
if (ec.ConditionalAccess.Type.IsNullableType)
{
Nullable.LiftedNull.Create(ec.ConditionalAccess.Type, Location.Null).Emit(ec);
}
else
{
ec.EmitNull();
}
}
ec.Emit(OpCodes.Br, ec.ConditionalAccess.EndLabel);
ec.MarkLabel(NullOperatorLabel);
if (instance_address != null)
{
instance_address.AddressOf(ec, AddressOp.Load);
}
else if (unwrap != null)
{
unwrap.Emit(ec);
var tmp = ec.GetTemporaryLocal(unwrap.Type);
ec.Emit(OpCodes.Stloc, tmp);
ec.Emit(OpCodes.Ldloca, tmp);
ec.FreeTemporaryLocal(tmp, unwrap.Type);
}
else if (!conditional_access_dup)
{
instance.Emit(ec);
}
}
}
public void Release (EmitContext ec)
{
ec.FreeTemporaryLocal (builder, type);
builder = null;
}
public void Emit (EmitContext ec, bool conditionalAccess)
{
Label NullOperatorLabel;
Nullable.Unwrap unwrap;
if (conditionalAccess && Expression.IsNeverNull (instance))
conditionalAccess = false;
if (conditionalAccess) {
NullOperatorLabel = ec.DefineLabel ();
unwrap = instance as Nullable.Unwrap;
} else {
NullOperatorLabel = new Label ();
unwrap = null;
}
IMemoryLocation instance_address = null;
bool conditional_access_dup = false;
if (unwrap != null) {
unwrap.Store (ec);
unwrap.EmitCheck (ec);
ec.Emit (OpCodes.Brtrue_S, NullOperatorLabel);
} else {
if (conditionalAccess && addressRequired) {
//
// Don't allocate temp variable when instance load is cheap and load and load-address
// operate on same memory
//
instance_address = instance as VariableReference;
if (instance_address == null)
instance_address = instance as LocalTemporary;
if (instance_address == null) {
EmitLoad (ec, false);
ec.Emit (OpCodes.Dup);
ec.EmitLoadFromPtr (instance.Type);
conditional_access_dup = true;
} else {
instance.Emit (ec);
}
} else {
EmitLoad (ec, !conditionalAccess);
if (conditionalAccess) {
conditional_access_dup = !IsInexpensiveLoad ();
if (conditional_access_dup)
ec.Emit (OpCodes.Dup);
}
}
if (conditionalAccess) {
if (instance.Type.Kind == MemberKind.TypeParameter)
ec.Emit (OpCodes.Box, instance.Type);
ec.Emit (OpCodes.Brtrue_S, NullOperatorLabel);
if (conditional_access_dup)
ec.Emit (OpCodes.Pop);
}
}
if (conditionalAccess) {
if (!ec.ConditionalAccess.Statement) {
if (ec.ConditionalAccess.Type.IsNullableType)
Nullable.LiftedNull.Create (ec.ConditionalAccess.Type, Location.Null).Emit (ec);
else
ec.EmitNull ();
}
ec.Emit (OpCodes.Br, ec.ConditionalAccess.EndLabel);
ec.MarkLabel (NullOperatorLabel);
if (instance_address != null) {
instance_address.AddressOf (ec, AddressOp.Load);
} else if (unwrap != null) {
unwrap.Emit (ec);
var tmp = ec.GetTemporaryLocal (unwrap.Type);
ec.Emit (OpCodes.Stloc, tmp);
ec.Emit (OpCodes.Ldloca, tmp);
ec.FreeTemporaryLocal (tmp, unwrap.Type);
} else if (!conditional_access_dup) {
instance.Emit (ec);
}
}
}
public void Release(EmitContext ec)
{
ec.FreeTemporaryLocal(builder, type);
builder = null;
}
public void Emit (EmitContext ec)
{
Nullable.Unwrap unwrap;
if (NullShortCircuit) {
NullOperatorLabel = ec.DefineLabel ();
unwrap = instance as Nullable.Unwrap;
} else {
unwrap = null;
}
if (unwrap != null) {
unwrap.Store (ec);
unwrap.EmitCheck (ec);
ec.Emit (OpCodes.Brfalse, NullOperatorLabel);
unwrap.Emit (ec);
var tmp = ec.GetTemporaryLocal (unwrap.Type);
ec.Emit (OpCodes.Stloc, tmp);
ec.Emit (OpCodes.Ldloca, tmp);
ec.FreeTemporaryLocal (tmp, unwrap.Type);
return;
}
EmitLoad (ec);
if (NullShortCircuit) {
ec.Emit (OpCodes.Dup);
ec.Emit (OpCodes.Brfalse, NullOperatorLabel);
}
value_on_stack = true;
}
public void Emit(EmitContext ec, bool conditionalAccess)
{
Label NullOperatorLabel;
Nullable.Unwrap unwrap;
if (conditionalAccess && Expression.IsNeverNull(instance))
{
conditionalAccess = false;
}
if (conditionalAccess)
{
NullOperatorLabel = ec.DefineLabel();
unwrap = instance as Nullable.Unwrap;
}
else
{
NullOperatorLabel = new Label();
unwrap = null;
}
if (unwrap != null)
{
unwrap.Store(ec);
unwrap.EmitCheck(ec);
ec.Emit(OpCodes.Brtrue_S, NullOperatorLabel);
}
else
{
EmitLoad(ec);
if (conditionalAccess)
{
ec.Emit(OpCodes.Dup);
ec.Emit(OpCodes.Brtrue_S, NullOperatorLabel);
ec.Emit(OpCodes.Pop);
}
}
if (conditionalAccess)
{
if (!ec.ConditionalAccess.Statement)
{
if (ec.ConditionalAccess.Type.IsNullableType)
{
Nullable.LiftedNull.Create(ec.ConditionalAccess.Type, Location.Null).Emit(ec);
}
else
{
ec.EmitNull();
}
}
ec.Emit(OpCodes.Br, ec.ConditionalAccess.EndLabel);
ec.MarkLabel(NullOperatorLabel);
if (unwrap != null)
{
unwrap.Emit(ec);
var tmp = ec.GetTemporaryLocal(unwrap.Type);
ec.Emit(OpCodes.Stloc, tmp);
ec.Emit(OpCodes.Ldloca, tmp);
ec.FreeTemporaryLocal(tmp, unwrap.Type);
}
}
}
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
Label false_target = ig.DefineLabel ();
Label end_target = ig.DefineLabel ();
expr.EmitBranchable (ec, false_target, false);
true_expr.Emit (ec);
if (type.IsInterface) {
LocalBuilder temp = ec.GetTemporaryLocal (type);
ig.Emit (OpCodes.Stloc, temp);
ig.Emit (OpCodes.Ldloc, temp);
ec.FreeTemporaryLocal (temp, type);
}
ig.Emit (OpCodes.Br, end_target);
ig.MarkLabel (false_target);
false_expr.Emit (ec);
ig.MarkLabel (end_target);
}
