public List<TryFinally> TryFinallyUnwind { get; set; }
+ public Label RecursivePatternLabel { get; set; }
+
#endregion
public void AddStatementEpilog (IExpressionCleanup cleanupExpression)
if (sf.IsHiddenLocation (loc))
return false;
-#if NET_4_0
methodSymbols.MarkSequencePoint (ig.ILOffset, sf.SourceFileEntry, loc.Row, loc.Column, false);
-#endif
return true;
}
ig.BeginFinallyBlock ();
}
- public void BeginScope ()
+ public void BeginScope (int scopeIndex)
{
if ((flags & Options.OmitDebugInfo) != 0)
return;
-#if NET_4_0
- methodSymbols.StartBlock (CodeBlockEntry.Type.Lexical, ig.ILOffset);
-#endif
+ methodSymbols.StartBlock (CodeBlockEntry.Type.Lexical, ig.ILOffset, scopeIndex);
}
- public void BeginCompilerScope ()
+ public void BeginCompilerScope (int scopeIndex)
{
if ((flags & Options.OmitDebugInfo) != 0)
return;
-#if NET_4_0
- methodSymbols.StartBlock (CodeBlockEntry.Type.CompilerGenerated, ig.ILOffset);
-#endif
+ methodSymbols.StartBlock (CodeBlockEntry.Type.CompilerGenerated, ig.ILOffset, scopeIndex);
}
public void EndExceptionBlock ()
if ((flags & Options.OmitDebugInfo) != 0)
return;
-#if NET_4_0
methodSymbols.EndBlock (ig.ILOffset);
-#endif
}
public void CloseConditionalAccess (TypeSpec type)
if (IsAnonymousStoreyMutateRequired)
type = CurrentAnonymousMethod.Storey.Mutator.Mutate (type);
+ if (pinned) {
+ //
+ // This is for .net compatibility. I am not sure why pinned
+ // pointer temps are converted to & even if they are pointers to
+ // pointers.
+ //
+ var pt = type as PointerContainer;
+ if (pt != null) {
+ type = pt.Element;
+ if (type.Kind == MemberKind.Void)
+ type = Module.Compiler.BuiltinTypes.IntPtr;
+
+ return ig.DeclareLocal (type.GetMetaInfo ().MakeByRefType (), true);
+ }
+ }
+
return ig.DeclareLocal (type.GetMetaInfo (), pinned);
}
switch (type.BuiltinType) {
case BuiltinTypeSpec.Type.Bool:
//
- // Workaround MSIL limitation. Load bool element as single bit,
- // bool array can actually store any byte value
+ // bool array can actually store any byte value in underlying byte slot
+ // and C# spec does not specify any normalization rule, except the result
+ // is undefined
//
- ig.Emit (OpCodes.Ldelem_U1);
- ig.Emit (OpCodes.Ldc_I4_0);
- ig.Emit (OpCodes.Cgt_Un);
- break;
case BuiltinTypeSpec.Type.Byte:
ig.Emit (OpCodes.Ldelem_U1);
break;
ig.Emit (OpCodes.Ldind_U1);
break;
case BuiltinTypeSpec.Type.SByte:
- ig.Emit (OpCodes.Ldind_I1);
- break;
case BuiltinTypeSpec.Type.Bool:
ig.Emit (OpCodes.Ldind_I1);
- ig.Emit (OpCodes.Ldc_I4_0);
- ig.Emit (OpCodes.Cgt_Un);
break;
case BuiltinTypeSpec.Type.ULong:
case BuiltinTypeSpec.Type.Long:
ig.Emit (OpCodes.Stobj, type.GetMetaInfo ());
break;
+ case MemberKind.PointerType:
+ ig.Emit (OpCodes.Stind_I);
+ break;
default:
ig.Emit (OpCodes.Stind_Ref);
break;
var ie = new InstanceEmitter (instance_copy, IsAddressCall (instance_copy, call_op, method.DeclaringType));
if (Arguments == null) {
- ie.EmitLoad (ec);
+ if (ConditionalAccess)
+ ie.Emit (ec, true);
+ else
+ ie.EmitLoad (ec, true);
}
} else if (!InstanceExpressionOnStack) {
var ie = new InstanceEmitter (InstanceExpression, IsAddressCall (InstanceExpression, call_op, method.DeclaringType));
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 {
- EmitLoad (ec);
+ 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 = !ExpressionAnalyzer.IsInexpensiveLoad (instance);
+ if (conditional_access_dup)
+ ec.Emit (OpCodes.Dup);
+ }
+ }
if (conditionalAccess) {
- ec.Emit (OpCodes.Dup);
+ if (instance.Type.Kind == MemberKind.TypeParameter)
+ ec.Emit (OpCodes.Box, instance.Type);
+
ec.Emit (OpCodes.Brtrue_S, NullOperatorLabel);
- ec.Emit (OpCodes.Pop);
+
+ 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
+ var t = ec.ConditionalAccess.Type;
+ if (t.IsNullableType)
+ Nullable.LiftedNull.Create (t, Location.Null).Emit (ec);
+ else {
ec.EmitNull ();
+
+ if (t.IsGenericParameter)
+ ec.Emit (OpCodes.Unbox_Any, t);
+ }
}
ec.Emit (OpCodes.Br, ec.ConditionalAccess.EndLabel);
ec.MarkLabel (NullOperatorLabel);
- if (unwrap != null) {
+ 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);
+ if (addressRequired) {
+ 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 EmitLoad (EmitContext ec)
+ public void EmitLoad (EmitContext ec, bool boxInstance)
{
var instance_type = instance.Type;
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) {
+ if (boxInstance && ExpressionAnalyzer.RequiresBoxing (instance)) {
ec.Emit (OpCodes.Box, instance_type);
}
}
return instance_type;
}
+
+
+ }
+
+ static class ExpressionAnalyzer
+ {
+ public static bool RequiresBoxing (Expression instance)
+ {
+ var instance_type = instance.Type;
+ if (instance_type.IsGenericParameter && !(instance is This) && TypeSpec.IsReferenceType (instance_type))
+ return true;
+
+ if (instance_type.IsStructOrEnum)
+ return true;
+
+ return false;
+ }
+
+ //
+ // Returns true for cheap race-free load, where we can avoid using dup
+ //
+ public static bool IsInexpensiveLoad (Expression instance)
+ {
+ if (instance is Constant)
+ return instance.IsSideEffectFree;
+
+ if (RequiresBoxing (instance))
+ return false;
+
+ var vr = instance as VariableReference;
+ if (vr != null) {
+ // Load from captured local would be racy without dup
+ return !vr.IsRef && !vr.IsHoisted;
+ }
+
+ if (instance is LocalTemporary)
+ return true;
+
+ var fe = instance as FieldExpr;
+ if (fe != null)
+ return fe.IsStatic || fe.InstanceExpression is This;
+
+ return false;
+ }
}
}
projects / mono.git / blobdiff