Extract JVM IR backend module out of compiler/backend

The old backend does not depend on IR modules anymore

compiler/backend/build.gradle.kts

@@ -1,4 +1,3 @@
-
 plugins {
     kotlin("jvm")
     id("jps-compatible")
@@ -12,9 +11,6 @@ dependencies {
     compile(project(":compiler:backend-common"))
     compile(project(":compiler:frontend"))
     compile(project(":compiler:frontend.java"))
-    compile(project(":compiler:ir.tree"))
-    compile(project(":compiler:ir.psi2ir"))
-    compile(project(":compiler:ir.backend.common"))
     compile(project(":compiler:serialization"))
     compileOnly(intellijCoreDep()) { includeJars("intellij-core", "annotations", "asm-all", rootProject = rootProject) }
 }
@@ -22,8 +18,6 @@ dependencies {
 sourceSets {
     "main" {
         projectDefault()
-        java.srcDir("../ir/backend.jvm/src")
     }
     "test" {}
 }
-

compiler/backend/src/org/jetbrains/kotlin/codegen/IrExpressionLambda.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.codegen
+
+interface IrExpressionLambda {
+    val isExtensionLambda: Boolean
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/MethodInliner.kt

@@ -5,9 +5,9 @@
 
 package org.jetbrains.kotlin.codegen.inline
 
-import org.jetbrains.kotlin.backend.jvm.codegen.IrExpressionLambda
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.ClosureCodegen
+import org.jetbrains.kotlin.codegen.IrExpressionLambda
 import org.jetbrains.kotlin.codegen.StackValue
 import org.jetbrains.kotlin.codegen.coroutines.continuationAsmType
 import org.jetbrains.kotlin.codegen.coroutines.getOrCreateJvmSuspendFunctionView