diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/Generator.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/Generator.kt
new file mode 100644
index 00000000000..934420e8df1
--- /dev/null
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/Generator.kt
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.ir.builders
+
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
+
+// TODO: rename Generator* to IrGenerator* when contributing back to Kotlin.
+
+interface Generator {
+    val context: GeneratorContext
+}
+
+interface GeneratorWithScope : Generator {
+    val scope: Scope
+}
+
+interface GeneratorContext {
+    val irBuiltIns: IrBuiltIns
+    val builtIns: KotlinBuiltIns get() = irBuiltIns.builtIns
+}
\ No newline at end of file
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrBuilder.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrBuilder.kt
index 63436c91098..19123a64b98 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrBuilder.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrBuilder.kt
@@ -16,19 +16,12 @@
 
 package org.jetbrains.kotlin.ir.builders
 
-import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrBlockBodyImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrBlockImpl
-import org.jetbrains.kotlin.psi.KtElement
-import org.jetbrains.kotlin.psi.psiUtil.endOffset
-import org.jetbrains.kotlin.psi.psiUtil.startOffset
-import org.jetbrains.kotlin.psi2ir.generators.Generator
-import org.jetbrains.kotlin.psi2ir.generators.GeneratorContext
-import org.jetbrains.kotlin.psi2ir.generators.GeneratorWithScope
 import org.jetbrains.kotlin.types.KotlinType
 import java.util.*
 
@@ -50,7 +43,7 @@ abstract class IrStatementsBuilder<out T : IrElement>(
         scope: Scope,
         startOffset: Int,
         endOffset: Int
-) : IrBuilderWithScope(context, scope, startOffset, endOffset), GeneratorWithScope {
+) : IrBuilderWithScope(context, scope, startOffset, endOffset) {
     operator fun IrStatement.unaryPlus() {
         addStatement(this)
     }
@@ -114,23 +107,21 @@ fun <T : IrBuilder> T.at(startOffset: Int, endOffset: Int): T {
     return this
 }
 
-fun <T : IrBuilder> T.at(psiElement: PsiElement): T {
-    this.startOffset = psiElement.startOffset
-    this.endOffset = psiElement.endOffset
-    return this
-}
-
-inline fun GeneratorWithScope.irBlock(ktElement: KtElement? = null, origin: IrStatementOrigin? = null, resultType: KotlinType? = null,
+inline fun GeneratorWithScope.irBlock(startOffset: Int = UNDEFINED_OFFSET, endOffset: Int = UNDEFINED_OFFSET,
+                                      origin: IrStatementOrigin? = null,
+                                      resultType: KotlinType? = null,
                                       body: IrBlockBuilder.() -> Unit
 ): IrExpression =
         IrBlockBuilder(context, scope,
-                       ktElement?.startOffset ?: UNDEFINED_OFFSET,
-                       ktElement?.endOffset ?: UNDEFINED_OFFSET,
+                       startOffset,
+                       endOffset,
                        origin, resultType
         ).block(body)
 
-inline fun GeneratorWithScope.irBlockBody(ktElement: KtElement? = null, body: IrBlockBodyBuilder.() -> Unit) : IrBlockBody =
+inline fun GeneratorWithScope.irBlockBody(startOffset: Int = UNDEFINED_OFFSET, endOffset: Int = UNDEFINED_OFFSET,
+                                          body: IrBlockBodyBuilder.() -> Unit
+) : IrBlockBody =
         IrBlockBodyBuilder(context, scope,
-                           ktElement?.startOffset ?: UNDEFINED_OFFSET,
-                           ktElement?.endOffset ?: UNDEFINED_OFFSET
+                           startOffset,
+                           endOffset
         ).blockBody(body)
\ No newline at end of file
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrMemberFunctionBuilder.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrMemberFunctionBuilder.kt
index ce7ea9f0f96..70e0bca79c3 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrMemberFunctionBuilder.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrMemberFunctionBuilder.kt
@@ -21,7 +21,6 @@ import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.impl.IrClassImpl
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
-import org.jetbrains.kotlin.psi2ir.generators.GeneratorContext
 
 class IrMemberFunctionBuilder(
         context: GeneratorContext,