diff --git a/src/Compilers/CSharp/Portable/PublicAPI.Unshipped.txt b/src/Compilers/CSharp/Portable/PublicAPI.Unshipped.txt
index e8ebd8546fb31523222431ea97cec9e46ad1b91d..36114469e609031d1782ef90a7d0800ee62e30c8 100644
--- a/src/Compilers/CSharp/Portable/PublicAPI.Unshipped.txt
+++ b/src/Compilers/CSharp/Portable/PublicAPI.Unshipped.txt
@@ -76,6 +76,10 @@ Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax.WithTypeParame
 Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax.RefKeyword.get -> Microsoft.CodeAnalysis.SyntaxToken
 Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax.Update(Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.AttributeListSyntax> attributeLists, Microsoft.CodeAnalysis.SyntaxTokenList modifiers, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.TypeSyntax returnType, Microsoft.CodeAnalysis.CSharp.Syntax.ExplicitInterfaceSpecifierSyntax explicitInterfaceSpecifier, Microsoft.CodeAnalysis.SyntaxToken identifier, Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterListSyntax typeParameterList, Microsoft.CodeAnalysis.CSharp.Syntax.ParameterListSyntax parameterList, Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterConstraintClauseSyntax> constraintClauses, Microsoft.CodeAnalysis.CSharp.Syntax.BlockSyntax body, Microsoft.CodeAnalysis.CSharp.Syntax.ArrowExpressionClauseSyntax expressionBody, Microsoft.CodeAnalysis.SyntaxToken semicolonToken) -> Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax
 Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax.WithRefKeyword(Microsoft.CodeAnalysis.SyntaxToken refKeyword) -> Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax
+Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax
+Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax.Token.get -> Microsoft.CodeAnalysis.SyntaxToken
+Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax.Update(Microsoft.CodeAnalysis.SyntaxToken token) -> Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax
+Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax.WithToken(Microsoft.CodeAnalysis.SyntaxToken token) -> Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax
 Microsoft.CodeAnalysis.CSharp.Syntax.ParenthesizedLambdaExpressionSyntax.RefKeyword.get -> Microsoft.CodeAnalysis.SyntaxToken
 Microsoft.CodeAnalysis.CSharp.Syntax.ParenthesizedLambdaExpressionSyntax.Update(Microsoft.CodeAnalysis.SyntaxToken asyncKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.ParameterListSyntax parameterList, Microsoft.CodeAnalysis.SyntaxToken arrowToken, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode body) -> Microsoft.CodeAnalysis.CSharp.Syntax.ParenthesizedLambdaExpressionSyntax
 Microsoft.CodeAnalysis.CSharp.Syntax.ParenthesizedLambdaExpressionSyntax.WithRefKeyword(Microsoft.CodeAnalysis.SyntaxToken refKeyword) -> Microsoft.CodeAnalysis.CSharp.Syntax.ParenthesizedLambdaExpressionSyntax
@@ -124,6 +128,9 @@ Microsoft.CodeAnalysis.CSharp.SyntaxKind.ConstantPattern = 9002 -> Microsoft.Cod
 Microsoft.CodeAnalysis.CSharp.SyntaxKind.DeclarationPattern = 9000 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
 Microsoft.CodeAnalysis.CSharp.SyntaxKind.IsPatternExpression = 8657 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
 Microsoft.CodeAnalysis.CSharp.SyntaxKind.LocalFunctionStatement = 8830 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
+Microsoft.CodeAnalysis.CSharp.SyntaxKind.OriginalExpression = 8755 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
+Microsoft.CodeAnalysis.CSharp.SyntaxKind.OriginalKeyword = 8440 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
+Microsoft.CodeAnalysis.CSharp.SyntaxKind.ReplaceKeyword = 8439 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
 Microsoft.CodeAnalysis.CSharp.SyntaxKind.TupleElement = 8926 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
 Microsoft.CodeAnalysis.CSharp.SyntaxKind.TupleExpression = 8927 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
 Microsoft.CodeAnalysis.CSharp.SyntaxKind.TupleType = 8925 -> Microsoft.CodeAnalysis.CSharp.SyntaxKind
@@ -133,6 +140,7 @@ override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitConstantPattern
 override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitDeclarationPattern(Microsoft.CodeAnalysis.CSharp.Syntax.DeclarationPatternSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
 override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitIsPatternExpression(Microsoft.CodeAnalysis.CSharp.Syntax.IsPatternExpressionSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
 override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitLocalFunctionStatement(Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
+override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitOriginalExpression(Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
 override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitTupleElement(Microsoft.CodeAnalysis.CSharp.Syntax.TupleElementSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
 override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitTupleExpression(Microsoft.CodeAnalysis.CSharp.Syntax.TupleExpressionSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
 override Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitTupleType(Microsoft.CodeAnalysis.CSharp.Syntax.TupleTypeSyntax node) -> Microsoft.CodeAnalysis.SyntaxNode
@@ -149,6 +157,8 @@ override Microsoft.CodeAnalysis.CSharp.Syntax.IsPatternExpressionSyntax.Accept(M
 override Microsoft.CodeAnalysis.CSharp.Syntax.IsPatternExpressionSyntax.Accept<TResult>(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult> visitor) -> TResult
 override Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax.Accept(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor visitor) -> void
 override Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax.Accept<TResult>(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult> visitor) -> TResult
+override Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax.Accept(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor visitor) -> void
+override Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax.Accept<TResult>(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult> visitor) -> TResult
 override Microsoft.CodeAnalysis.CSharp.Syntax.TupleElementSyntax.Accept(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor visitor) -> void
 override Microsoft.CodeAnalysis.CSharp.Syntax.TupleElementSyntax.Accept<TResult>(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult> visitor) -> TResult
 override Microsoft.CodeAnalysis.CSharp.Syntax.TupleExpressionSyntax.Accept(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor visitor) -> void
@@ -179,6 +189,8 @@ static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.LocalFunctionStatement(Micros
 static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.LocalFunctionStatement(Microsoft.CodeAnalysis.SyntaxTokenList modifiers, Microsoft.CodeAnalysis.CSharp.Syntax.TypeSyntax returnType, Microsoft.CodeAnalysis.SyntaxToken identifier, Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterListSyntax typeParameterList, Microsoft.CodeAnalysis.CSharp.Syntax.ParameterListSyntax parameterList, Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterConstraintClauseSyntax> constraintClauses, Microsoft.CodeAnalysis.CSharp.Syntax.BlockSyntax body, Microsoft.CodeAnalysis.CSharp.Syntax.ArrowExpressionClauseSyntax expressionBody) -> Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax
 static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.LocalFunctionStatement(Microsoft.CodeAnalysis.SyntaxTokenList modifiers, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.TypeSyntax returnType, Microsoft.CodeAnalysis.SyntaxToken identifier, Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterListSyntax typeParameterList, Microsoft.CodeAnalysis.CSharp.Syntax.ParameterListSyntax parameterList, Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterConstraintClauseSyntax> constraintClauses, Microsoft.CodeAnalysis.CSharp.Syntax.BlockSyntax body, Microsoft.CodeAnalysis.CSharp.Syntax.ArrowExpressionClauseSyntax expressionBody, Microsoft.CodeAnalysis.SyntaxToken semicolonToken) -> Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax
 static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.MethodDeclaration(Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.AttributeListSyntax> attributeLists, Microsoft.CodeAnalysis.SyntaxTokenList modifiers, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.TypeSyntax returnType, Microsoft.CodeAnalysis.CSharp.Syntax.ExplicitInterfaceSpecifierSyntax explicitInterfaceSpecifier, Microsoft.CodeAnalysis.SyntaxToken identifier, Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterListSyntax typeParameterList, Microsoft.CodeAnalysis.CSharp.Syntax.ParameterListSyntax parameterList, Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.TypeParameterConstraintClauseSyntax> constraintClauses, Microsoft.CodeAnalysis.CSharp.Syntax.BlockSyntax body, Microsoft.CodeAnalysis.CSharp.Syntax.ArrowExpressionClauseSyntax expressionBody, Microsoft.CodeAnalysis.SyntaxToken semicolonToken) -> Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax
+static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.OriginalExpression() -> Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax
+static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.OriginalExpression(Microsoft.CodeAnalysis.SyntaxToken token) -> Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax
 static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.ParenthesizedLambdaExpression(Microsoft.CodeAnalysis.SyntaxToken asyncKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.ParameterListSyntax parameterList, Microsoft.CodeAnalysis.SyntaxToken arrowToken, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode body) -> Microsoft.CodeAnalysis.CSharp.Syntax.ParenthesizedLambdaExpressionSyntax
 static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.PropertyDeclaration(Microsoft.CodeAnalysis.SyntaxList<Microsoft.CodeAnalysis.CSharp.Syntax.AttributeListSyntax> attributeLists, Microsoft.CodeAnalysis.SyntaxTokenList modifiers, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.TypeSyntax type, Microsoft.CodeAnalysis.CSharp.Syntax.ExplicitInterfaceSpecifierSyntax explicitInterfaceSpecifier, Microsoft.CodeAnalysis.SyntaxToken identifier, Microsoft.CodeAnalysis.CSharp.Syntax.AccessorListSyntax accessorList, Microsoft.CodeAnalysis.CSharp.Syntax.ArrowExpressionClauseSyntax expressionBody, Microsoft.CodeAnalysis.CSharp.Syntax.EqualsValueClauseSyntax initializer, Microsoft.CodeAnalysis.SyntaxToken semicolonToken) -> Microsoft.CodeAnalysis.CSharp.Syntax.PropertyDeclarationSyntax
 static Microsoft.CodeAnalysis.CSharp.SyntaxFactory.ReturnStatement(Microsoft.CodeAnalysis.SyntaxToken returnKeyword, Microsoft.CodeAnalysis.SyntaxToken refKeyword, Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax expression, Microsoft.CodeAnalysis.SyntaxToken semicolonToken) -> Microsoft.CodeAnalysis.CSharp.Syntax.ReturnStatementSyntax
@@ -196,6 +208,7 @@ virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitConstantPattern(M
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitDeclarationPattern(Microsoft.CodeAnalysis.CSharp.Syntax.DeclarationPatternSyntax node) -> void
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitIsPatternExpression(Microsoft.CodeAnalysis.CSharp.Syntax.IsPatternExpressionSyntax node) -> void
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitLocalFunctionStatement(Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax node) -> void
+virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitOriginalExpression(Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax node) -> void
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitTupleElement(Microsoft.CodeAnalysis.CSharp.Syntax.TupleElementSyntax node) -> void
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitTupleExpression(Microsoft.CodeAnalysis.CSharp.Syntax.TupleExpressionSyntax node) -> void
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitTupleType(Microsoft.CodeAnalysis.CSharp.Syntax.TupleTypeSyntax node) -> void
@@ -205,6 +218,7 @@ virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitConstant
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitDeclarationPattern(Microsoft.CodeAnalysis.CSharp.Syntax.DeclarationPatternSyntax node) -> TResult
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitIsPatternExpression(Microsoft.CodeAnalysis.CSharp.Syntax.IsPatternExpressionSyntax node) -> TResult
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitLocalFunctionStatement(Microsoft.CodeAnalysis.CSharp.Syntax.LocalFunctionStatementSyntax node) -> TResult
+virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitOriginalExpression(Microsoft.CodeAnalysis.CSharp.Syntax.OriginalExpressionSyntax node) -> TResult
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitTupleElement(Microsoft.CodeAnalysis.CSharp.Syntax.TupleElementSyntax node) -> TResult
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitTupleExpression(Microsoft.CodeAnalysis.CSharp.Syntax.TupleExpressionSyntax node) -> TResult
 virtual Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor<TResult>.VisitTupleType(Microsoft.CodeAnalysis.CSharp.Syntax.TupleTypeSyntax node) -> TResult
diff --git a/src/Compilers/CSharp/Portable/Symbols/Source/SourceMemberMethodSymbol.cs b/src/Compilers/CSharp/Portable/Symbols/Source/SourceMemberMethodSymbol.cs
index adafaf6e10ed082e9edc5b2c2daea3f178df6383..775a3f934d7c2419045d553d54f0609911b56756 100644
--- a/src/Compilers/CSharp/Portable/Symbols/Source/SourceMemberMethodSymbol.cs
+++ b/src/Compilers/CSharp/Portable/Symbols/Source/SourceMemberMethodSymbol.cs
@@ -114,15 +114,6 @@ internal sealed class SourceMemberMethodSymbol : SourceMethodSymbol
             {
                 diagnostics.Add(info, location);
             }
-
-            if (this.IsPartial)
-            {
-                // Partial methods must be completed early because they are matched up
-                // by signature while producing the enclosing type's member list.
-                state.NotePartComplete(CompletionPart.StartMethodChecks);
-                MethodChecks(diagnostics);
-                state.NotePartComplete(CompletionPart.FinishMethodChecks);
-            }
         }
 
         public override bool ReturnsVoid
diff --git a/src/Compilers/CSharp/Test/Emit/PDB/PDBTests.cs b/src/Compilers/CSharp/Test/Emit/PDB/PDBTests.cs
index f5174d014a659183ac0efe6b70b02c56dcbd115b..032365c16c1fff75afa9a832c48cebfaf2880555 100644
--- a/src/Compilers/CSharp/Test/Emit/PDB/PDBTests.cs
+++ b/src/Compilers/CSharp/Test/Emit/PDB/PDBTests.cs
@@ -171,7 +171,6 @@ public void SymWriterErrors2()
                     manifestResources: null,
                     options: null,
                     debugEntryPoint: null,
-                    getHostDiagnostics: null,
                     testData: new CompilationTestData() { SymWriterFactory = () => new object() });
 
                 result.Diagnostics.Verify(
@@ -203,7 +202,6 @@ public void SymWriterErrors3()
                     manifestResources: null,
                     options: null,
                     debugEntryPoint: null,
-                    getHostDiagnostics: null,
                     testData: new CompilationTestData() { SymWriterFactory = () => new MockSymUnmanagedWriter() });
 
                 result.Diagnostics.Verify(
diff --git a/src/Compilers/Core/Portable/PublicAPI.Unshipped.txt b/src/Compilers/Core/Portable/PublicAPI.Unshipped.txt
index f4b5d2240523c8ec3b924935e35eb565497f1fe5..043582553d7b5657f4738f8c395f5cf577337be7 100644
--- a/src/Compilers/Core/Portable/PublicAPI.Unshipped.txt
+++ b/src/Compilers/Core/Portable/PublicAPI.Unshipped.txt
@@ -662,9 +662,23 @@ Microsoft.CodeAnalysis.Semantics.UnaryOperationKind.UnsignedPostfixDecrement = 7
 Microsoft.CodeAnalysis.Semantics.UnaryOperationKind.UnsignedPostfixIncrement = 771 -> Microsoft.CodeAnalysis.Semantics.UnaryOperationKind
 Microsoft.CodeAnalysis.Semantics.UnaryOperationKind.UnsignedPrefixDecrement = 774 -> Microsoft.CodeAnalysis.Semantics.UnaryOperationKind
 Microsoft.CodeAnalysis.Semantics.UnaryOperationKind.UnsignedPrefixIncrement = 773 -> Microsoft.CodeAnalysis.Semantics.UnaryOperationKind
+Microsoft.CodeAnalysis.SourceGenerator
+Microsoft.CodeAnalysis.SourceGeneratorAttribute
+Microsoft.CodeAnalysis.SourceGeneratorAttribute.Languages.get -> string[]
+Microsoft.CodeAnalysis.SourceGeneratorAttribute.SourceGeneratorAttribute(string firstLanguage, params string[] additionalLanguages) -> void
+Microsoft.CodeAnalysis.SourceGeneratorContext
+Microsoft.CodeAnalysis.SourceGeneratorExtensions
+abstract Microsoft.CodeAnalysis.Diagnostics.AnalyzerReference.GetSourceGenerators(string language) -> System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.SourceGenerator>
 abstract Microsoft.CodeAnalysis.Diagnostics.OperationBlockStartAnalysisContext.RegisterOperationAction(System.Action<Microsoft.CodeAnalysis.Diagnostics.OperationAnalysisContext> action, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.OperationKind> operationKinds) -> void
 abstract Microsoft.CodeAnalysis.Diagnostics.OperationBlockStartAnalysisContext.RegisterOperationBlockEndAction(System.Action<Microsoft.CodeAnalysis.Diagnostics.OperationBlockAnalysisContext> action) -> void
 abstract Microsoft.CodeAnalysis.SemanticModel.GetOperationCore(Microsoft.CodeAnalysis.SyntaxNode node, System.Threading.CancellationToken cancellationToken) -> Microsoft.CodeAnalysis.IOperation
+abstract Microsoft.CodeAnalysis.SourceGenerator.Execute(Microsoft.CodeAnalysis.SourceGeneratorContext context) -> void
+abstract Microsoft.CodeAnalysis.SourceGeneratorContext.AddCompilationUnit(string name, Microsoft.CodeAnalysis.SyntaxTree tree) -> void
+abstract Microsoft.CodeAnalysis.SourceGeneratorContext.Compilation.get -> Microsoft.CodeAnalysis.Compilation
+abstract Microsoft.CodeAnalysis.SourceGeneratorContext.ReportDiagnostic(Microsoft.CodeAnalysis.Diagnostic diagnostic) -> void
+override Microsoft.CodeAnalysis.Diagnostics.AnalyzerFileReference.GetSourceGenerators(string language) -> System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.SourceGenerator>
+override Microsoft.CodeAnalysis.Diagnostics.AnalyzerImageReference.GetSourceGenerators(string language) -> System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.SourceGenerator>
+override Microsoft.CodeAnalysis.Diagnostics.UnresolvedAnalyzerReference.GetSourceGenerators(string language) -> System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.SourceGenerator>
 override Microsoft.CodeAnalysis.Semantics.OperationWalker.Visit(Microsoft.CodeAnalysis.IOperation operation) -> void
 override Microsoft.CodeAnalysis.Semantics.OperationWalker.VisitAddressOfExpression(Microsoft.CodeAnalysis.Semantics.IAddressOfExpression operation) -> void
 override Microsoft.CodeAnalysis.Semantics.OperationWalker.VisitArgument(Microsoft.CodeAnalysis.Semantics.IArgument operation) -> void
@@ -754,6 +768,7 @@ static Microsoft.CodeAnalysis.Semantics.UnaryAndBinaryOperationExtensions.GetSim
 static Microsoft.CodeAnalysis.Semantics.UnaryAndBinaryOperationExtensions.GetUnaryOperandKind(Microsoft.CodeAnalysis.Semantics.UnaryOperationKind kind) -> Microsoft.CodeAnalysis.Semantics.UnaryOperandKind
 static Microsoft.CodeAnalysis.Semantics.UnaryAndBinaryOperationExtensions.GetUnaryOperandKind(this Microsoft.CodeAnalysis.Semantics.IIncrementExpression increment) -> Microsoft.CodeAnalysis.Semantics.UnaryOperandKind
 static Microsoft.CodeAnalysis.Semantics.UnaryAndBinaryOperationExtensions.GetUnaryOperandKind(this Microsoft.CodeAnalysis.Semantics.IUnaryOperatorExpression unary) -> Microsoft.CodeAnalysis.Semantics.UnaryOperandKind
+static Microsoft.CodeAnalysis.SourceGeneratorExtensions.GenerateSource(this Microsoft.CodeAnalysis.Compilation compilation, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.SourceGenerator> generators, string path, bool writeToDisk, System.Threading.CancellationToken cancellationToken) -> System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.SyntaxTree>
 virtual Microsoft.CodeAnalysis.Diagnostics.AnalysisContext.RegisterOperationAction(System.Action<Microsoft.CodeAnalysis.Diagnostics.OperationAnalysisContext> action, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.OperationKind> operationKinds) -> void
 virtual Microsoft.CodeAnalysis.Diagnostics.AnalysisContext.RegisterOperationBlockAction(System.Action<Microsoft.CodeAnalysis.Diagnostics.OperationBlockAnalysisContext> action) -> void
 virtual Microsoft.CodeAnalysis.Diagnostics.AnalysisContext.RegisterOperationBlockStartAction(System.Action<Microsoft.CodeAnalysis.Diagnostics.OperationBlockStartAnalysisContext> action) -> void
diff --git a/src/Test/Utilities/Shared/Compilation/IRuntimeEnvironment.cs b/src/Test/Utilities/Shared/Compilation/IRuntimeEnvironment.cs
index 2922d3d920615a2bab7b7af9336b389e7ffecb6a..2cb0cbf8581d548452c6ae68ae9344070958374d 100644
--- a/src/Test/Utilities/Shared/Compilation/IRuntimeEnvironment.cs
+++ b/src/Test/Utilities/Shared/Compilation/IRuntimeEnvironment.cs
@@ -215,7 +215,6 @@ CompilationTestData testData
                         options: EmitOptions.Default,
                         debugEntryPoint: null,
                         testData: testData,
-                        getHostDiagnostics: null,
                         cancellationToken: default(CancellationToken));
                 }
                 finally
diff --git a/src/Workspaces/Core/Portable/PublicAPI.Unshipped.txt b/src/Workspaces/Core/Portable/PublicAPI.Unshipped.txt
index aba52e2bed3e108a2976d002972b3f34ec30e217..afe6f8a0f073f255fb9f5f4656be2ac3fc1221df 100644
--- a/src/Workspaces/Core/Portable/PublicAPI.Unshipped.txt
+++ b/src/Workspaces/Core/Portable/PublicAPI.Unshipped.txt
@@ -1,6 +1,8 @@
+Microsoft.CodeAnalysis.Workspace.UpdateGeneratedDocumentsIfNecessary(Microsoft.CodeAnalysis.ProjectId projectId) -> void
 abstract Microsoft.CodeAnalysis.Editing.SyntaxGenerator.NameOfExpression(Microsoft.CodeAnalysis.SyntaxNode expression) -> Microsoft.CodeAnalysis.SyntaxNode
 static Microsoft.CodeAnalysis.Simplification.SimplificationOptions.NamingPreferences.get -> Microsoft.CodeAnalysis.Options.PerLanguageOption<string>
 static Microsoft.CodeAnalysis.Simplification.SimplificationOptions.QualifyEventAccess.get -> Microsoft.CodeAnalysis.Options.PerLanguageOption<bool>
 static Microsoft.CodeAnalysis.Simplification.SimplificationOptions.QualifyFieldAccess.get -> Microsoft.CodeAnalysis.Options.PerLanguageOption<bool>
 static Microsoft.CodeAnalysis.Simplification.SimplificationOptions.QualifyMethodAccess.get -> Microsoft.CodeAnalysis.Options.PerLanguageOption<bool>
 static Microsoft.CodeAnalysis.Simplification.SimplificationOptions.QualifyPropertyAccess.get -> Microsoft.CodeAnalysis.Options.PerLanguageOption<bool>
+virtual Microsoft.CodeAnalysis.Workspace.UpdateGeneratedDocuments(Microsoft.CodeAnalysis.ProjectId projectId, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.DocumentInfo> documentsRemoved, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.DocumentInfo> documentsAdded) -> void
\ No newline at end of file