diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/state/SignatureDumpingBuilderFactory.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/state/SignatureDumpingBuilderFactory.kt
index 37b7a785adc..12929772fcf 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/state/SignatureDumpingBuilderFactory.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/state/SignatureDumpingBuilderFactory.kt
@@ -45,6 +45,7 @@ class SignatureDumpingBuilderFactory(
             modifiers -= DescriptorRendererModifier.VISIBILITY
         }
         val TYPE_RENDERER = DescriptorRenderer.withOptions {
+            withSourceFileForTopLevel = false
             modifiers -= DescriptorRendererModifier.VISIBILITY
         }
     }
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/resolve/source/PsiSourceElement.kt b/compiler/frontend/src/org/jetbrains/kotlin/resolve/source/PsiSourceElement.kt
index 065f1813e37..dbed094594f 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/resolve/source/PsiSourceElement.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/resolve/source/PsiSourceElement.kt
@@ -33,4 +33,6 @@ class PsiSourceFile(val psiFile: PsiFile): SourceFile {
     override fun hashCode(): Int = psiFile.hashCode()
 
     override fun toString(): String = psiFile.virtualFile.path
+
+    override fun getName(): String? = psiFile.virtualFile?.name
 }
diff --git a/compiler/testData/cli/jvm/conflictingOverloads.out b/compiler/testData/cli/jvm/conflictingOverloads.out
index acd1aa4bc55..e2e7d4aa321 100644
--- a/compiler/testData/cli/jvm/conflictingOverloads.out
+++ b/compiler/testData/cli/jvm/conflictingOverloads.out
@@ -1,7 +1,7 @@
-compiler/testData/cli/jvm/conflictingOverloads.kt:1:1: error: conflicting overloads: public fun a(): List<Int> defined in root package, public fun a(): List<String> defined in root package
+compiler/testData/cli/jvm/conflictingOverloads.kt:1:1: error: conflicting overloads: public fun a(): List<Int> defined in root package in file conflictingOverloads.kt, public fun a(): List<String> defined in root package in file conflictingOverloads.kt
 fun a(): List<Int> = null!!
 ^
-compiler/testData/cli/jvm/conflictingOverloads.kt:2:1: error: conflicting overloads: public fun a(): List<Int> defined in root package, public fun a(): List<String> defined in root package
+compiler/testData/cli/jvm/conflictingOverloads.kt:2:1: error: conflicting overloads: public fun a(): List<Int> defined in root package in file conflictingOverloads.kt, public fun a(): List<String> defined in root package in file conflictingOverloads.kt
 fun a(): List<String> = null!!
 ^
 COMPILATION_ERROR
\ No newline at end of file
diff --git a/compiler/testData/cli/jvm/signatureClash.out b/compiler/testData/cli/jvm/signatureClash.out
index b752c606f2d..387b231a4f6 100644
--- a/compiler/testData/cli/jvm/signatureClash.out
+++ b/compiler/testData/cli/jvm/signatureClash.out
@@ -14,13 +14,13 @@ compiler/testData/cli/jvm/signatureClash.kt:9:5: error: platform declaration cla
     val a: Int = 1
     ^
 compiler/testData/cli/jvm/signatureClash.kt:12:1: error: platform declaration clash: The following declarations have the same JVM signature (getB()I):
-    fun <get-b>(): Int defined in root package
-    fun getB(): Int defined in root package
+    fun <get-b>(): Int defined in root package in file signatureClash.kt
+    fun getB(): Int defined in root package in file signatureClash.kt
 fun getB(): Int = 1
 ^
 compiler/testData/cli/jvm/signatureClash.kt:13:1: error: platform declaration clash: The following declarations have the same JVM signature (getB()I):
-    fun <get-b>(): Int defined in root package
-    fun getB(): Int defined in root package
+    fun <get-b>(): Int defined in root package in file signatureClash.kt
+    fun getB(): Int defined in root package in file signatureClash.kt
 val b: Int = 1
 ^
 compiler/testData/cli/jvm/signatureClash.kt:19:7: error: platform declaration clash: The following declarations have the same JVM signature (getTr()I):
diff --git a/core/descriptors/src/org/jetbrains/kotlin/descriptors/SourceFile.java b/core/descriptors/src/org/jetbrains/kotlin/descriptors/SourceFile.java
index 7baa91d94b3..a0c9d2069e4 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/descriptors/SourceFile.java
+++ b/core/descriptors/src/org/jetbrains/kotlin/descriptors/SourceFile.java
@@ -16,6 +16,17 @@
 
 package org.jetbrains.kotlin.descriptors;
 
+import org.jetbrains.annotations.Nullable;
+
 public interface SourceFile {
-    SourceFile NO_SOURCE_FILE = new SourceFile() {};
+    SourceFile NO_SOURCE_FILE = new SourceFile() {
+        @Nullable
+        @Override
+        public String getName() {
+            return null;
+        }
+    };
+
+    @Nullable
+    String getName();
 }
diff --git a/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRenderer.kt b/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRenderer.kt
index 4b90d4f6c5b..245cd34d131 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRenderer.kt
+++ b/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRenderer.kt
@@ -178,6 +178,7 @@ enum class AnnotationArgumentsRenderingPolicy(
 interface DescriptorRendererOptions {
     var classifierNamePolicy: ClassifierNamePolicy
     var withDefinedIn: Boolean
+    var withSourceFileForTopLevel: Boolean
     var modifiers: Set<DescriptorRendererModifier>
     var startFromName: Boolean
     var startFromDeclarationKeyword: Boolean
diff --git a/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererImpl.kt b/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererImpl.kt
index f5eb5264fa3..a698013d7a1 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererImpl.kt
+++ b/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererImpl.kt
@@ -383,6 +383,14 @@ internal class DescriptorRendererImpl(
             append(" ").append(renderMessage("defined in")).append(" ")
             val fqName = DescriptorUtils.getFqName(containingDeclaration)
             append(if (fqName.isRoot) "root package" else renderFqName(fqName))
+
+            if (withSourceFileForTopLevel &&
+                containingDeclaration is PackageFragmentDescriptor &&
+                descriptor is DeclarationDescriptorWithSource) {
+                descriptor.source.containingFile.name?.let { sourceFileName ->
+                    append(" ").append(renderMessage("in file")).append(" ").append(sourceFileName)
+                }
+            }
         }
     }
 
diff --git a/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererOptionsImpl.kt b/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererOptionsImpl.kt
index 1091b8dfc67..8dcc4241903 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererOptionsImpl.kt
+++ b/core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererOptionsImpl.kt
@@ -67,6 +67,7 @@ internal class DescriptorRendererOptionsImpl : DescriptorRendererOptions {
 
     override var classifierNamePolicy: ClassifierNamePolicy by property(ClassifierNamePolicy.SOURCE_CODE_QUALIFIED)
     override var withDefinedIn by property(true)
+    override var withSourceFileForTopLevel by property(true)
     override var modifiers: Set<DescriptorRendererModifier> by property(DescriptorRendererModifier.DEFAULTS)
     override var startFromName by property(false)
     override var startFromDeclarationKeyword by property(false)
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/IdeRenderers.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/IdeRenderers.kt
index 3647676cf23..edb2b704e92 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/IdeRenderers.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/IdeRenderers.kt
@@ -24,7 +24,6 @@ import org.jetbrains.kotlin.resolve.MemberComparator
 import org.jetbrains.kotlin.resolve.calls.inference.InferenceErrorData
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.ConflictingJvmDeclarationsData
-import kotlin.comparisons.compareBy
 
 object IdeRenderers {
 
diff --git a/idea/testData/checker/duplicateJvmSignature/functionAndProperty/topLevelMultifileRuntime.kt b/idea/testData/checker/duplicateJvmSignature/functionAndProperty/topLevelMultifileRuntime.kt
index 9fca59ebab6..80d6b6cf485 100644
--- a/idea/testData/checker/duplicateJvmSignature/functionAndProperty/topLevelMultifileRuntime.kt
+++ b/idea/testData/checker/duplicateJvmSignature/functionAndProperty/topLevelMultifileRuntime.kt
@@ -4,8 +4,8 @@
 package test
 
 <error descr="[CONFLICTING_JVM_DECLARATIONS] Platform declaration clash: The following declarations have the same JVM signature (getX()I):
-    fun <get-x>(): Int defined in test
-    fun getX(): Int defined in test">val x</error> = 1
+    fun <get-x>(): Int defined in test in file topLevelMultifileRuntime.kt
+    fun getX(): Int defined in test in file topLevelMultifileRuntime.kt">val x</error> = 1
 <error descr="[CONFLICTING_JVM_DECLARATIONS] Platform declaration clash: The following declarations have the same JVM signature (getX()I):
-    fun <get-x>(): Int defined in test
-    fun getX(): Int defined in test">fun getX()</error> = 1
+    fun <get-x>(): Int defined in test in file topLevelMultifileRuntime.kt
+    fun getX(): Int defined in test in file topLevelMultifileRuntime.kt">fun getX()</error> = 1
diff --git a/idea/testData/checker/regression/kt9887.kt b/idea/testData/checker/regression/kt9887.kt
index a1b076a4684..be47483dbea 100644
--- a/idea/testData/checker/regression/kt9887.kt
+++ b/idea/testData/checker/regression/kt9887.kt
@@ -2,4 +2,4 @@ open class A<T>()
 class G<T>()
 
 
-class B : A<<error descr="[WRONG_NUMBER_OF_TYPE_ARGUMENTS] One type argument expected for class G<T> defined in root package">G</error>>()
\ No newline at end of file
+class B : A<<error descr="[WRONG_NUMBER_OF_TYPE_ARGUMENTS] One type argument expected for class G<T> defined in root package in file kt9887.kt">G</error>>()
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage1.txt b/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage1.txt
index 3a3b139fa62..aba60bddda9 100644
--- a/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage1.txt
+++ b/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage1.txt
@@ -1,2 +1,2 @@
 <!-- conflictingOverloadsDefaultPackage1 -->
-Conflicting overloads: public fun foo(x: Int): Int defined in root package, public fun foo(y: Int): Int defined in root package
\ No newline at end of file
+Conflicting overloads: public fun foo(x: Int): Int defined in root package in file conflictingOverloadsDefaultPackage.kt, public fun foo(y: Int): Int defined in root package in file conflictingOverloadsDefaultPackage.kt
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage2.txt b/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage2.txt
index c717e1e525e..2217fe06dc9 100644
--- a/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage2.txt
+++ b/idea/testData/diagnosticMessage/conflictingOverloadsDefaultPackage2.txt
@@ -1,2 +1,2 @@
 <!-- conflictingOverloadsDefaultPackage2 -->
-Conflicting overloads: public fun foo(x: Int): Int defined in root package, public fun foo(y: Int): Int defined in root package
\ No newline at end of file
+Conflicting overloads: public fun foo(x: Int): Int defined in root package in file conflictingOverloadsDefaultPackage.kt, public fun foo(y: Int): Int defined in root package in file conflictingOverloadsDefaultPackage.kt
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel1.txt b/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel1.txt
index 461b2e88f11..afc94ada068 100644
--- a/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel1.txt
+++ b/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel1.txt
@@ -1,2 +1,2 @@
 <!-- constructorsRedeclarationTopLevel1 -->
-Conflicting overloads: public fun Element(x: String): Unit defined in root package, public constructor Element(x: String) defined in Element
\ No newline at end of file
+Conflicting overloads: public fun Element(x: String): Unit defined in root package in file constructorsRedeclarationTopLevel.kt, public constructor Element(x: String) defined in Element
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel2.txt b/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel2.txt
index 34db820434d..967d8b682df 100644
--- a/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel2.txt
+++ b/idea/testData/diagnosticMessage/constructorsRedeclarationTopLevel2.txt
@@ -1,2 +1,2 @@
 <!-- constructorsRedeclarationTopLevel2 -->
-Conflicting overloads: public fun Element(x: String): Unit defined in root package, public constructor Element(x: String) defined in Element
\ No newline at end of file
+Conflicting overloads: public fun Element(x: String): Unit defined in root package in file constructorsRedeclarationTopLevel.kt, public constructor Element(x: String) defined in Element
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/noneApplicableGeneric1.html b/idea/testData/diagnosticMessage/noneApplicableGeneric1.html
index eb44484b372..105d90f4aa4 100644
--- a/idea/testData/diagnosticMessage/noneApplicableGeneric1.html
+++ b/idea/testData/diagnosticMessage/noneApplicableGeneric1.html
@@ -4,9 +4,9 @@ None of the following functions can be called with the arguments supplied.
 <ul>
   <li>foo(<font color=red><b>T</b></font>, Any, MutableList<`<font color=red><b>T</b></font>>, MutableList<`<font color=red><b>T</b></font>>)<br/>
   <i>where</i> <font color=red><b>T</b></font><i> cannot be inferred</i><i> for </i><br/>
-  <b>fun</b> <`T> foo(t: T, a: Any, lt: MutableList<`T>, lr: MutableList<`T>): Int <i>defined in</i> p</li>
+  <b>fun</b> <`T> foo(t: T, a: Any, lt: MutableList<`T>, lr: MutableList<`T>): Int <i>defined in</i> p <i>in file</i> noneApplicableGeneric.kt</li>
   <li>foo(Int, <font color=red><b>R</b></font>, MutableList<`Int>, MutableList<`<font color=red><b>R</b></font>>)<br/>
   <i>where</i> <font color=red><b>R</b></font><i> cannot be inferred</i>; T = Int<i> for </i><br/>
-  <b>fun</b> <`T, R> foo(t: T, r: R, lt: MutableList<`T>, lr: MutableList<`R>): Int <i>defined in</i> p</li>
+  <b>fun</b> <`T, R> foo(t: T, r: R, lt: MutableList<`T>, lr: MutableList<`R>): Int <i>defined in</i> p <i>in file</i> noneApplicableGeneric.kt</li>
 </ul>
 </html>
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/noneApplicableTxt1.txt b/idea/testData/diagnosticMessage/noneApplicableTxt1.txt
index 3ceb80f3e78..a41e14776c2 100644
--- a/idea/testData/diagnosticMessage/noneApplicableTxt1.txt
+++ b/idea/testData/diagnosticMessage/noneApplicableTxt1.txt
@@ -1,5 +1,5 @@
 <!-- noneApplicableTxt1 -->
 None of the following functions can be called with the arguments supplied: 
-public fun foo(b: a.b.String): Unit defined in a.b
-public fun foo(i: Int): Unit defined in a.b
-public fun foo(a: kotlin.String): Unit defined in a.b
\ No newline at end of file
+public fun foo(b: a.b.String): Unit defined in a.b in file noneApplicableTxt.kt
+public fun foo(i: Int): Unit defined in a.b in file noneApplicableTxt.kt
+public fun foo(a: kotlin.String): Unit defined in a.b in file noneApplicableTxt.kt
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/overloadResolutionAmbiguityHtml1.html b/idea/testData/diagnosticMessage/overloadResolutionAmbiguityHtml1.html
index 30ee43babd2..26ceb028937 100644
--- a/idea/testData/diagnosticMessage/overloadResolutionAmbiguityHtml1.html
+++ b/idea/testData/diagnosticMessage/overloadResolutionAmbiguityHtml1.html
@@ -3,7 +3,7 @@
 Overload resolution ambiguity. All these functions match.
 <ul>
   <li><b>public</b> <b>fun</b> <`T> foo(b: a.b.String, t: ???): Unit <i>defined in</i> a.b</li>
-  <li><b>public</b> <b>fun</b> foo(i: Int): Unit <i>defined in</i> a.b</li>
+  <li><b>public</b> <b>fun</b> foo(i: Int): Unit <i>defined in</i> a.b <i>in file</i> overloadResolutionAmbiguityHtml.kt</li>
   <li><b>public</b> <b>fun</b> <`T> foo(a: kotlin.String, t: ???): Unit <i>defined in</i> a.b</li>
 </ul>
 </html>
\ No newline at end of file
diff --git a/idea/testData/diagnosticMessage/overloadResolutionAmbiguityTxt1.txt b/idea/testData/diagnosticMessage/overloadResolutionAmbiguityTxt1.txt
index 976c8db7227..82df8f335f1 100644
--- a/idea/testData/diagnosticMessage/overloadResolutionAmbiguityTxt1.txt
+++ b/idea/testData/diagnosticMessage/overloadResolutionAmbiguityTxt1.txt
@@ -1,5 +1,5 @@
 <!-- overloadResolutionAmbiguityTxt1 -->
 Overload resolution ambiguity: 
 public fun <T> foo(b: a.b.String, t: ???): Unit defined in a.b
-public fun foo(i: Int): Unit defined in a.b
+public fun foo(i: Int): Unit defined in a.b in file overloadResolutionAmbiguityTxt.kt
 public fun <T> foo(a: kotlin.String, t: ???): Unit defined in a.b
\ No newline at end of file