Remove obsolete kotlin.build.useIR flag

(cherry picked from commit 91e47f1fd7)

build.gradle.kts

@@ -153,7 +153,6 @@ if (!project.hasProperty("versions.kotlin-native")) {
 
 val effectSystemEnabled by extra(project.getBooleanProperty("kotlin.compiler.effectSystemEnabled") ?: false)
 val newInferenceEnabled by extra(project.getBooleanProperty("kotlin.compiler.newInferenceEnabled") ?: false)
-val useJvmIrBackend by extra(project.kotlinBuildProperties.useIR)
 val useJvmFir by extra(project.kotlinBuildProperties.useFir)
 
 val intellijSeparateSdks = project.getBooleanProperty("intellijSeparateSdks") ?: false
@@ -475,10 +474,6 @@ allprojects {
         kotlinOptions {
             freeCompilerArgs = commonCompilerArgs + jvmCompilerArgs
 
-            if (useJvmIrBackend) {
-                useIR = true
-            }
-
             if (useJvmFir && this@allprojects.path !in projectsWithDisabledFirBootstrap) {
                 freeCompilerArgs += "-Xuse-fir"
                 freeCompilerArgs += "-Xabi-stability=stable"

buildSrc/src/main/kotlin/gradle-plugin-common-configuration.gradle.kts

@@ -42,7 +42,8 @@ tasks.withType<KotlinCompile> {
     kotlinOptions.freeCompilerArgs += listOf(
         "-Xskip-prerelease-check",
         "-Xskip-runtime-version-check",
-        "-Xsuppress-version-warnings"
+        "-Xsuppress-version-warnings",
+        "-Xuse-ir" // Needed as long as languageVersion is less than 1.5.
     )
 }
 

dependencies/kotlin-build-gradle-plugin/src/BuildProperties.kt

@@ -80,8 +80,6 @@ class KotlinBuildProperties(
 
     val localBootstrapPath: String? = getOrNull("bootstrap.local.path") as String?
 
-    val useIR: Boolean = getBoolean("kotlin.build.useIR")
-
     val useIRForLibraries: Boolean = getBoolean("kotlin.build.useIRForLibraries")
 
     val useFir: Boolean = getBoolean("kotlin.build.useFir")

gradle.properties

@@ -10,9 +10,7 @@ defaultSnapshotVersion=1.5.255-SNAPSHOT
 kotlin.compiler.effectSystemEnabled=true
 kotlin.compiler.newInferenceEnabled=true
 
-# Enable JVM IR backend for all modules except libraries such as kotlin-stdlib, kotlin-reflect, kotlin-test.
-kotlin.build.useIR=true
-# Enable JVM IR backend for the libraries mentioned above.
+# Enable JVM IR backend for kotlin-stdlib, kotlin-reflect, kotlin-test.
 #kotlin.build.useIRForLibraries=true
 
 #maven.repository.mirror=http://repository.jetbrains.com/remote-repos/

kotlin-native/build.gradle

@@ -120,15 +120,6 @@ allprojects {
         }
     }
 
-    if (findProperty("kotlin.build.useIR") == "true") {
-        tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
-            kotlinOptions {
-                useIR = true
-                freeCompilerArgs += ["-Xir-binary-with-stable-abi"]
-            }
-        }
-    }
-
     setupHostAndTarget()
     loadCommandLineProperties()
     loadLocalProperties()

kotlin-native/gradle.properties

@@ -34,6 +34,4 @@ ktorVersion=1.2.1
 shadowVersion=5.1.0
 metadataVersion=0.0.1-dev-10
 
-# Uncomment to compile Kotlin/Native backend modules with JVM IR backend.
-# kotlin.build.useIR=true
-kotlinNativeVersionInResources=true
+kotlinNativeVersionInResources=true