Added LocalSymbol.CanScheduleToStack property (changeset 1342014)

Src/Compilers/CSharp/Portable/CodeGen/Optimizer.cs

@@ -1592,8 +1592,7 @@ private void RecordVarWrite(LocalSymbol local)
 
         private static bool CanScheduleToStack(LocalSymbol local)
         {
-            // cannot schedule constants and pinned locals
-            return !(local.IsConst || local.IsPinned);
+            return local.CanScheduleToStack;
         }
 
         private void DeclareLocals(ImmutableArray<LocalSymbol> locals, int stack)

Src/Compilers/CSharp/Portable/Symbols/LocalSymbol.cs

@@ -23,6 +23,11 @@ protected LocalSymbol()
             get;
         }
 
+        internal virtual bool CanScheduleToStack
+        {
+            get { return !IsConst && !IsPinned; }
+        }
+
         internal abstract SyntaxToken IdentifierToken
         {
             get;

Src/Compilers/VisualBasic/Portable/CodeGen/Optimizer/StackScheduler.Analyzer.vb

@@ -1169,9 +1169,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.CodeGen
             End Sub
 
             Private Shared Function CanScheduleToStack(local As LocalSymbol) As Boolean
-                ' cannot schedule constants and catch variables
-                ' in theory catch vars could be scheduled, but are not worth the trouble.
-                Return Not (local.IsConst OrElse local.IsCatch)
+                Return local.CanScheduleToStack
             End Function
 
             Private Sub DeclareLocals(locals As ImmutableArray(Of LocalSymbol), stack As Integer)

Src/Compilers/VisualBasic/Portable/Symbols/Source/LocalSymbol.vb

@@ -248,6 +248,14 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.Symbols
             End Get
         End Property
 
+        Friend Overridable ReadOnly Property CanScheduleToStack As Boolean
+            Get
+                ' cannot schedule constants and catch variables
+                ' in theory catch vars could be scheduled, but are not worth the trouble.
+                Return Not IsConst AndAlso Not IsCatch
+            End Get
+        End Property
+
         Public ReadOnly Property IsStatic As Boolean
             Get
                 Return Me.DeclarationKind = LocalDeclarationKind.Static