From 2952ff558a59f1496932c19206bfe130a36523d4 Mon Sep 17 00:00:00 2001
From: Svetlana Isakova <svetlana.isakova@jetbrains.com>
Date: Tue, 13 May 2014 15:06:17 +0400
Subject: [PATCH] Made LabelResolver a singleton

---
 .../context/BasicCallResolutionContext.java   | 13 +++++--------
 .../CallCandidateResolutionContext.java       | 11 ++++-------
 .../calls/context/CallResolutionContext.java  |  4 +---
 .../calls/context/ResolutionContext.java      | 19 +++++++------------
 .../context/SimpleResolutionContext.java      |  9 +++------
 .../resolve/calls/tasks/ResolutionTask.java   | 11 ++++-------
 .../BasicExpressionTypingVisitor.java         |  5 +++--
 .../ControlStructureTypingVisitor.java        |  6 +++---
 .../expressions/ExpressionTypingContext.java  | 17 +++++++----------
 .../expressions/ExpressionTypingServices.java |  2 +-
 .../lang/types/expressions/LabelResolver.java |  7 ++-----
 11 files changed, 40 insertions(+), 64 deletions(-)

diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/BasicCallResolutionContext.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/BasicCallResolutionContext.java
index 8c2852f809f..a68985326ce 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/BasicCallResolutionContext.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/BasicCallResolutionContext.java
@@ -25,7 +25,6 @@ import org.jetbrains.jet.lang.resolve.calls.autocasts.DataFlowInfo;
 import org.jetbrains.jet.lang.resolve.calls.model.MutableDataFlowInfoForArguments;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.expressions.LabelResolver;
 
 public class BasicCallResolutionContext extends CallResolutionContext<BasicCallResolutionContext> {
     private BasicCallResolutionContext(
@@ -37,13 +36,12 @@ public class BasicCallResolutionContext extends CallResolutionContext<BasicCallR
             @NotNull ContextDependency contextDependency,
             @NotNull CheckValueArgumentsMode checkArguments,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @Nullable MutableDataFlowInfoForArguments dataFlowInfoForArguments,
             @NotNull CallResolverExtension callResolverExtension,
             boolean isAnnotationContext,
             boolean collectAllCandidates
     ) {
-        super(trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache, labelResolver,
+        super(trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache,
               dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
     }
 
@@ -60,7 +58,7 @@ public class BasicCallResolutionContext extends CallResolutionContext<BasicCallR
             boolean isAnnotationContext
     ) {
         return new BasicCallResolutionContext(trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments,
-             new ResolutionResultsCacheImpl(), LabelResolver.create(), null,
+             new ResolutionResultsCacheImpl(), null,
              callResolverExtension, isAnnotationContext, false);
     }
 
@@ -70,7 +68,7 @@ public class BasicCallResolutionContext extends CallResolutionContext<BasicCallR
             @Nullable MutableDataFlowInfoForArguments dataFlowInfoForArguments
     ) {
         return new BasicCallResolutionContext(context.trace, context.scope, call, context.expectedType, context.dataFlowInfo, context.contextDependency, checkArguments,
-             context.resolutionResultsCache, context.labelResolver, dataFlowInfoForArguments, context.callResolverExtension,
+             context.resolutionResultsCache, dataFlowInfoForArguments, context.callResolverExtension,
              context.isAnnotationContext, context.collectAllCandidates);
     }
 
@@ -89,17 +87,16 @@ public class BasicCallResolutionContext extends CallResolutionContext<BasicCallR
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             boolean collectAllCandidates
     ) {
         return new BasicCallResolutionContext(
                 trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache,
-                labelResolver, dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
+                dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
     }
 
     public BasicCallResolutionContext replaceCall(@NotNull Call newCall) {
         return new BasicCallResolutionContext(
                 trace, scope, newCall, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache,
-                labelResolver, dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
+                dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
     }
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallCandidateResolutionContext.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallCandidateResolutionContext.java
index 730f37910a3..bc338551c24 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallCandidateResolutionContext.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallCandidateResolutionContext.java
@@ -29,7 +29,6 @@ import org.jetbrains.jet.lang.resolve.calls.tasks.TracingStrategy;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
 import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.expressions.LabelResolver;
 
 public final class CallCandidateResolutionContext<D extends CallableDescriptor> extends CallResolutionContext<CallCandidateResolutionContext<D>> {
     public final MutableResolvedCall<D> candidateCall;
@@ -47,14 +46,13 @@ public final class CallCandidateResolutionContext<D extends CallableDescriptor>
             @NotNull ContextDependency contextDependency,
             @NotNull CheckValueArgumentsMode checkArguments,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @Nullable MutableDataFlowInfoForArguments dataFlowInfoForArguments,
             @NotNull CallResolverExtension callResolverExtension,
             @NotNull ReceiverValue explicitExtensionReceiverForInvoke,
             boolean isAnnotationContext,
             boolean collectAllCandidates
     ) {
-        super(trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache, labelResolver,
+        super(trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache,
               dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
         this.candidateCall = candidateCall;
         this.tracing = tracing;
@@ -69,7 +67,7 @@ public final class CallCandidateResolutionContext<D extends CallableDescriptor>
         return new CallCandidateResolutionContext<D>(
                 candidateCall, tracing, trace, context.scope, call, context.expectedType,
                 context.dataFlowInfo, context.contextDependency, context.checkArguments,
-                context.resolutionResultsCache, context.labelResolver, context.dataFlowInfoForArguments,
+                context.resolutionResultsCache, context.dataFlowInfoForArguments,
                 context.callResolverExtension, explicitExtensionReceiverForInvoke, context.isAnnotationContext, context.collectAllCandidates);
     }
 
@@ -92,7 +90,7 @@ public final class CallCandidateResolutionContext<D extends CallableDescriptor>
         return new CallCandidateResolutionContext<D>(
                 candidateCall, tracing, context.trace, context.scope, context.call, context.expectedType,
                 context.dataFlowInfo, context.contextDependency, context.checkArguments, context.resolutionResultsCache,
-                context.labelResolver, context.dataFlowInfoForArguments, context.callResolverExtension, ReceiverValue.NO_RECEIVER,
+                context.dataFlowInfoForArguments, context.callResolverExtension, ReceiverValue.NO_RECEIVER,
                 context.isAnnotationContext, context.collectAllCandidates);
     }
 
@@ -104,12 +102,11 @@ public final class CallCandidateResolutionContext<D extends CallableDescriptor>
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             boolean collectAllCandidates
     ) {
         return new CallCandidateResolutionContext<D>(
                 candidateCall, tracing, trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments,
-                resolutionResultsCache, labelResolver, dataFlowInfoForArguments, callResolverExtension, explicitExtensionReceiverForInvoke,
+                resolutionResultsCache, dataFlowInfoForArguments, callResolverExtension, explicitExtensionReceiverForInvoke,
                 isAnnotationContext, collectAllCandidates);
     }
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallResolutionContext.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallResolutionContext.java
index 703c9135163..76edb9305fb 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallResolutionContext.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/CallResolutionContext.java
@@ -26,7 +26,6 @@ import org.jetbrains.jet.lang.resolve.calls.model.DataFlowInfoForArgumentsImpl;
 import org.jetbrains.jet.lang.resolve.calls.model.MutableDataFlowInfoForArguments;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.expressions.LabelResolver;
 
 public abstract class CallResolutionContext<Context extends CallResolutionContext<Context>> extends ResolutionContext<Context> {
     public final Call call;
@@ -43,14 +42,13 @@ public abstract class CallResolutionContext<Context extends CallResolutionContex
             @NotNull ContextDependency contextDependency,
             @NotNull CheckValueArgumentsMode checkArguments,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @SuppressWarnings("NullableProblems")
             @Nullable MutableDataFlowInfoForArguments dataFlowInfoForArguments,
             @NotNull CallResolverExtension callResolverExtension,
             boolean isAnnotationContext,
             boolean collectAllCandidates
     ) {
-        super(trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, labelResolver, callResolverExtension,
+        super(trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, callResolverExtension,
               isAnnotationContext, collectAllCandidates);
         this.call = call;
         this.checkArguments = checkArguments;
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/ResolutionContext.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/ResolutionContext.java
index 8ddfd1e6558..cd46d4c775f 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/ResolutionContext.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/ResolutionContext.java
@@ -24,7 +24,6 @@ import org.jetbrains.jet.lang.resolve.calls.autocasts.DataFlowInfo;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.types.JetType;
 import org.jetbrains.jet.lang.types.TypeUtils;
-import org.jetbrains.jet.lang.types.expressions.LabelResolver;
 
 public abstract class ResolutionContext<Context extends ResolutionContext<Context>> {
     public final BindingTrace trace;
@@ -33,7 +32,6 @@ public abstract class ResolutionContext<Context extends ResolutionContext<Contex
     public final DataFlowInfo dataFlowInfo;
     public final ContextDependency contextDependency;
     public final ResolutionResultsCache resolutionResultsCache;
-    public final LabelResolver labelResolver;
     public final CallResolverExtension callResolverExtension;
     public final boolean isAnnotationContext;
     public final boolean collectAllCandidates;
@@ -45,7 +43,6 @@ public abstract class ResolutionContext<Context extends ResolutionContext<Contex
             @NotNull DataFlowInfo dataFlowInfo,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @NotNull CallResolverExtension callResolverExtension,
             boolean isAnnotationContext,
             boolean collectAllCandidates
@@ -56,7 +53,6 @@ public abstract class ResolutionContext<Context extends ResolutionContext<Contex
         this.dataFlowInfo = dataFlowInfo;
         this.contextDependency = contextDependency;
         this.resolutionResultsCache = resolutionResultsCache;
-        this.labelResolver = labelResolver;
         this.callResolverExtension = callResolverExtension;
         this.isAnnotationContext = isAnnotationContext;
         this.collectAllCandidates = collectAllCandidates;
@@ -69,7 +65,6 @@ public abstract class ResolutionContext<Context extends ResolutionContext<Contex
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             boolean collectAllCandidates
     );
 
@@ -82,38 +77,38 @@ public abstract class ResolutionContext<Context extends ResolutionContext<Contex
     @NotNull
     public Context replaceBindingTrace(@NotNull BindingTrace trace) {
         if (this.trace == trace) return self();
-        return create(trace, scope, dataFlowInfo, expectedType, contextDependency, resolutionResultsCache, labelResolver, collectAllCandidates);
+        return create(trace, scope, dataFlowInfo, expectedType, contextDependency, resolutionResultsCache, collectAllCandidates);
     }
 
     @NotNull
     public Context replaceDataFlowInfo(@NotNull DataFlowInfo newDataFlowInfo) {
         if (newDataFlowInfo == dataFlowInfo) return self();
-        return create(trace, scope, newDataFlowInfo, expectedType, contextDependency, resolutionResultsCache, labelResolver, collectAllCandidates);
+        return create(trace, scope, newDataFlowInfo, expectedType, contextDependency, resolutionResultsCache, collectAllCandidates);
     }
 
     @NotNull
     public Context replaceExpectedType(@Nullable JetType newExpectedType) {
         if (newExpectedType == null) return replaceExpectedType(TypeUtils.NO_EXPECTED_TYPE);
         if (expectedType == newExpectedType) return self();
-        return create(trace, scope, dataFlowInfo, newExpectedType, contextDependency, resolutionResultsCache, labelResolver, collectAllCandidates);
+        return create(trace, scope, dataFlowInfo, newExpectedType, contextDependency, resolutionResultsCache, collectAllCandidates);
     }
 
     @NotNull
     public Context replaceScope(@NotNull JetScope newScope) {
         if (newScope == scope) return self();
-        return create(trace, newScope, dataFlowInfo, expectedType, contextDependency, resolutionResultsCache, labelResolver, collectAllCandidates);
+        return create(trace, newScope, dataFlowInfo, expectedType, contextDependency, resolutionResultsCache, collectAllCandidates);
     }
 
     @NotNull
     public Context replaceContextDependency(@NotNull ContextDependency newContextDependency) {
         if (newContextDependency == contextDependency) return self();
-        return create(trace, scope, dataFlowInfo, expectedType, newContextDependency, resolutionResultsCache, labelResolver, collectAllCandidates);
+        return create(trace, scope, dataFlowInfo, expectedType, newContextDependency, resolutionResultsCache, collectAllCandidates);
     }
 
     @NotNull
     public Context replaceResolutionResultsCache(@NotNull ResolutionResultsCache newResolutionResultsCache) {
         if (newResolutionResultsCache == resolutionResultsCache) return self();
-        return create(trace, scope, dataFlowInfo, expectedType, contextDependency, newResolutionResultsCache, labelResolver, collectAllCandidates);
+        return create(trace, scope, dataFlowInfo, expectedType, contextDependency, newResolutionResultsCache, collectAllCandidates);
     }
 
     @NotNull
@@ -123,6 +118,6 @@ public abstract class ResolutionContext<Context extends ResolutionContext<Contex
 
     @NotNull
     public Context replaceCollectAllCandidates(boolean newCollectAllCandidates) {
-        return create(trace, scope, dataFlowInfo, expectedType, contextDependency, resolutionResultsCache, labelResolver, newCollectAllCandidates);
+        return create(trace, scope, dataFlowInfo, expectedType, contextDependency, resolutionResultsCache, newCollectAllCandidates);
     }
 }
\ No newline at end of file
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/SimpleResolutionContext.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/SimpleResolutionContext.java
index 32d4f228ed5..66527b09206 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/SimpleResolutionContext.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/context/SimpleResolutionContext.java
@@ -22,7 +22,6 @@ import org.jetbrains.jet.lang.resolve.calls.CallResolverExtension;
 import org.jetbrains.jet.lang.resolve.calls.autocasts.DataFlowInfo;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.expressions.LabelResolver;
 
 public class SimpleResolutionContext extends ResolutionContext<SimpleResolutionContext> {
     private SimpleResolutionContext(
@@ -32,12 +31,11 @@ public class SimpleResolutionContext extends ResolutionContext<SimpleResolutionC
             @NotNull DataFlowInfo dataFlowInfo,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @NotNull CallResolverExtension callResolverExtension,
             boolean isAnnotationContext,
             boolean collectAllCandidates
     ) {
-        super(trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, labelResolver, callResolverExtension,
+        super(trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, callResolverExtension,
               isAnnotationContext, collectAllCandidates);
     }
 
@@ -50,7 +48,7 @@ public class SimpleResolutionContext extends ResolutionContext<SimpleResolutionC
             @NotNull CallResolverExtension callResolverExtension
     ) {
         this(trace, scope, expectedType, dataFlowInfo, contextDependency, new ResolutionResultsCacheImpl(),
-             LabelResolver.create(), callResolverExtension, false, false);
+             callResolverExtension, false, false);
     }
 
     @Override
@@ -61,11 +59,10 @@ public class SimpleResolutionContext extends ResolutionContext<SimpleResolutionC
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             boolean collectAllCandidates
     ) {
         return new SimpleResolutionContext(
-                trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, labelResolver, callResolverExtension,
+                trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, callResolverExtension,
                 isAnnotationContext, collectAllCandidates);
     }
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/tasks/ResolutionTask.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/tasks/ResolutionTask.java
index 1997a3d143e..8c1a2a37089 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/tasks/ResolutionTask.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/tasks/ResolutionTask.java
@@ -30,7 +30,6 @@ import org.jetbrains.jet.lang.resolve.calls.model.MutableDataFlowInfoForArgument
 import org.jetbrains.jet.lang.resolve.calls.model.MutableResolvedCall;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.expressions.LabelResolver;
 
 import java.util.Collection;
 
@@ -54,7 +53,6 @@ public class ResolutionTask<D extends CallableDescriptor, F extends D> extends C
             @NotNull ContextDependency contextDependency,
             @NotNull CheckValueArgumentsMode checkArguments,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @Nullable MutableDataFlowInfoForArguments dataFlowInfoForArguments,
             @NotNull CallResolverExtension callResolverExtension,
             @NotNull Collection<MutableResolvedCall<F>> resolvedCalls,
@@ -62,7 +60,7 @@ public class ResolutionTask<D extends CallableDescriptor, F extends D> extends C
             boolean collectAllCandidates
     ) {
         super(trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments, resolutionResultsCache,
-              labelResolver, dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
+              dataFlowInfoForArguments, callResolverExtension, isAnnotationContext, collectAllCandidates);
         this.candidates = candidates;
         this.resolvedCalls = resolvedCalls;
         this.tracing = tracing;
@@ -76,7 +74,7 @@ public class ResolutionTask<D extends CallableDescriptor, F extends D> extends C
         this(candidates, tracing,
              context.trace, context.scope, context.call,
              context.expectedType, context.dataFlowInfo, context.contextDependency, context.checkArguments,
-             context.resolutionResultsCache, context.labelResolver, context.dataFlowInfoForArguments,
+             context.resolutionResultsCache, context.dataFlowInfoForArguments,
              context.callResolverExtension, Lists.<MutableResolvedCall<F>>newArrayList(), context.isAnnotationContext, context.collectAllCandidates);
     }
 
@@ -121,12 +119,11 @@ public class ResolutionTask<D extends CallableDescriptor, F extends D> extends C
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             boolean collectAllCandidates
     ) {
         ResolutionTask<D, F> newTask = new ResolutionTask<D, F>(
                 candidates, tracing, trace, scope, call, expectedType, dataFlowInfo, contextDependency, checkArguments,
-                resolutionResultsCache, labelResolver, dataFlowInfoForArguments, callResolverExtension, resolvedCalls, isAnnotationContext,
+                resolutionResultsCache, dataFlowInfoForArguments, callResolverExtension, resolvedCalls, isAnnotationContext,
                 collectAllCandidates);
         newTask.setCheckingStrategy(checkingStrategy);
         return newTask;
@@ -135,7 +132,7 @@ public class ResolutionTask<D extends CallableDescriptor, F extends D> extends C
     public ResolutionTask<D, F> replaceCall(@NotNull Call newCall) {
         return new ResolutionTask<D, F>(
                 candidates, tracing, trace, scope, newCall, expectedType, dataFlowInfo, contextDependency, checkArguments,
-                resolutionResultsCache, labelResolver, dataFlowInfoForArguments, callResolverExtension, resolvedCalls,
+                resolutionResultsCache, dataFlowInfoForArguments, callResolverExtension, resolvedCalls,
                 isAnnotationContext, collectAllCandidates);
     }
 
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/BasicExpressionTypingVisitor.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/BasicExpressionTypingVisitor.java
index 65077332825..84815829960 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/BasicExpressionTypingVisitor.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/BasicExpressionTypingVisitor.java
@@ -376,8 +376,9 @@ public class BasicExpressionTypingVisitor extends ExpressionTypingVisitor {
     ) {
         String labelName = expression.getLabelName();
         if (labelName != null) {
-            LabelResolver.LabeledReceiverResolutionResult resolutionResult = context.labelResolver.resolveThisLabel(
-                    expression.getInstanceReference(), expression.getTargetLabel(), context, Name.identifierForLabel(labelName));
+            LabelResolver.LabeledReceiverResolutionResult resolutionResult =
+                    LabelResolver.INSTANCE.resolveThisLabel(
+                            expression.getInstanceReference(), expression.getTargetLabel(), context, Name.identifierForLabel(labelName));
             if (onlyClassReceivers && resolutionResult.success()) {
                 if (!isDeclaredInClass(resolutionResult.getReceiverParameterDescriptor())) {
                     return LabelResolver.LabeledReceiverResolutionResult.labelResolutionSuccess(NO_RECEIVER_PARAMETER);
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ControlStructureTypingVisitor.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ControlStructureTypingVisitor.java
index a74c4e4b24a..4102fda4334 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ControlStructureTypingVisitor.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ControlStructureTypingVisitor.java
@@ -437,7 +437,7 @@ public class ControlStructureTypingVisitor extends ExpressionTypingVisitor {
 
     @Override
     public JetTypeInfo visitReturnExpression(@NotNull JetReturnExpression expression, ExpressionTypingContext context) {
-        JetElement labelTargetElement = context.labelResolver.resolveLabel(expression, context);
+        JetElement labelTargetElement = LabelResolver.INSTANCE.resolveLabel(expression, context);
 
         JetExpression returnedExpression = expression.getReturnedExpression();
 
@@ -509,13 +509,13 @@ public class ControlStructureTypingVisitor extends ExpressionTypingVisitor {
 
     @Override
     public JetTypeInfo visitBreakExpression(@NotNull JetBreakExpression expression, ExpressionTypingContext context) {
-        context.labelResolver.resolveLabel(expression, context);
+        LabelResolver.INSTANCE.resolveLabel(expression, context);
         return DataFlowUtils.checkType(KotlinBuiltIns.getInstance().getNothingType(), expression, context, context.dataFlowInfo);
     }
 
     @Override
     public JetTypeInfo visitContinueExpression(@NotNull JetContinueExpression expression, ExpressionTypingContext context) {
-        context.labelResolver.resolveLabel(expression, context);
+        LabelResolver.INSTANCE.resolveLabel(expression, context);
         return DataFlowUtils.checkType(KotlinBuiltIns.getInstance().getNothingType(), expression, context, context.dataFlowInfo);
     }
 
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingContext.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingContext.java
index bbb71cf855d..af7b0f45ab8 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingContext.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingContext.java
@@ -40,16 +40,16 @@ public class ExpressionTypingContext extends ResolutionContext<ExpressionTypingC
             @NotNull JetType expectedType
     ) {
         return newContext(trace, scope, dataFlowInfo, expectedType,
-                          ContextDependency.INDEPENDENT, new ResolutionResultsCacheImpl(), LabelResolver.create(),
+                          ContextDependency.INDEPENDENT, new ResolutionResultsCacheImpl(),
                           expressionTypingServices.createExtension(scope, false), false);
     }
 
     @NotNull
     public static ExpressionTypingContext newContext(@NotNull ResolutionContext context) {
         return new ExpressionTypingContext(
-                context.labelResolver, context.trace, context.scope, context.scope.getContainingDeclaration(),
-                context.dataFlowInfo, context.expectedType, context.contextDependency, context.resolutionResultsCache,
-                context.callResolverExtension, context.isAnnotationContext, context.collectAllCandidates
+                context.trace, context.scope, context.scope.getContainingDeclaration(), context.dataFlowInfo, context.expectedType,
+                context.contextDependency, context.resolutionResultsCache, context.callResolverExtension, context.isAnnotationContext,
+                context.collectAllCandidates
         );
     }
 
@@ -61,12 +61,11 @@ public class ExpressionTypingContext extends ResolutionContext<ExpressionTypingC
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             @NotNull CallResolverExtension callResolverExtension,
             boolean isAnnotationContext
     ) {
         return new ExpressionTypingContext(
-                labelResolver, trace, scope, scope.getContainingDeclaration(), dataFlowInfo, expectedType, contextDependency,
+                trace, scope, scope.getContainingDeclaration(), dataFlowInfo, expectedType, contextDependency,
                 resolutionResultsCache, callResolverExtension, isAnnotationContext, false);
     }
 
@@ -74,7 +73,6 @@ public class ExpressionTypingContext extends ResolutionContext<ExpressionTypingC
     private CompileTimeConstantChecker compileTimeConstantChecker;
 
     private ExpressionTypingContext(
-            @NotNull LabelResolver labelResolver,
             @NotNull BindingTrace trace,
             @NotNull JetScope scope,
             @NotNull DeclarationDescriptor containingDeclaration,
@@ -86,7 +84,7 @@ public class ExpressionTypingContext extends ResolutionContext<ExpressionTypingC
             boolean isAnnotationContext,
             boolean collectAllCandidates
     ) {
-        super(trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, labelResolver, callResolverExtension,
+        super(trace, scope, expectedType, dataFlowInfo, contextDependency, resolutionResultsCache, callResolverExtension,
               isAnnotationContext, collectAllCandidates);
         this.containingDeclaration = containingDeclaration;
     }
@@ -99,10 +97,9 @@ public class ExpressionTypingContext extends ResolutionContext<ExpressionTypingC
             @NotNull JetType expectedType,
             @NotNull ContextDependency contextDependency,
             @NotNull ResolutionResultsCache resolutionResultsCache,
-            @NotNull LabelResolver labelResolver,
             boolean collectAllCandidates
     ) {
-        return new ExpressionTypingContext(this.labelResolver, trace, scope, containingDeclaration, dataFlowInfo,
+        return new ExpressionTypingContext(trace, scope, containingDeclaration, dataFlowInfo,
                                            expectedType, contextDependency, resolutionResultsCache, callResolverExtension,
                                            isAnnotationContext, collectAllCandidates);
     }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingServices.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingServices.java
index 6b4bb0d6602..e6885543fc2 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingServices.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingServices.java
@@ -347,7 +347,7 @@ public class ExpressionTypingServices {
     private ExpressionTypingContext createContext(ExpressionTypingContext oldContext, BindingTrace trace, WritableScope scope, DataFlowInfo dataFlowInfo, JetType expectedType) {
         return ExpressionTypingContext.newContext(
                 trace, scope, dataFlowInfo, expectedType, oldContext.contextDependency, oldContext.resolutionResultsCache,
-                oldContext.labelResolver, oldContext.callResolverExtension, oldContext.isAnnotationContext);
+                oldContext.callResolverExtension, oldContext.isAnnotationContext);
     }
 
     @Nullable
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/LabelResolver.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/LabelResolver.java
index f6b7fc620d2..5d09763ea84 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/LabelResolver.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/LabelResolver.java
@@ -36,11 +36,8 @@ import static org.jetbrains.jet.lang.resolve.BindingContext.LABEL_TARGET;
 import static org.jetbrains.jet.lang.resolve.BindingContext.REFERENCE_TARGET;
 
 public class LabelResolver {
-
-    @NotNull
-    public static LabelResolver create() {
-        return new LabelResolver();
-    }
+    
+    public static LabelResolver INSTANCE = new LabelResolver();
 
     private LabelResolver() {}