JVM_IR KT-45103 optimize direct invoke for lambdas and callable refs

compiler/testData/codegen/box/closures/captureExtensionReceiverX2.kt

@@ -1,5 +1,7 @@
+fun <T> eval(fn: () -> T) = fn()
+
 fun String.f(x: String): String {
-    fun String.g() = { this@f + this@g }()
+    fun String.g() = eval { this@f + this@g }
     return x.g()
 }
 

compiler/testData/codegen/box/closures/captureInSuperConstructorCall/outerCapturedInNestedLambda.kt

@@ -3,7 +3,12 @@ open class Base(val callback: () -> String)
 class Outer {
     val ok = "OK"
 
-    inner class Inner : Base({ { ok }() })
+    inner class Inner : Base(
+        {
+            val lambda = { ok }
+            lambda()
+        }
+    )
 }
 
 fun box(): String =

compiler/testData/codegen/box/closures/closureOnTopLevel1.kt

@@ -7,12 +7,14 @@
 
 package test
 
-val p = { "OK" }()
+fun <T> eval(lambda: () -> T) = lambda()
+
+val p = eval { "OK" }
 
 val getter: String
-    get() = { "OK" }()
+    get() = eval { "OK" }
 
-fun f() = { "OK" }()
+fun f() = eval { "OK" }
 
 val obj = object : Function0<String> {
     override fun invoke() = "OK"

compiler/testData/codegen/box/closures/closureOnTopLevel2.kt

@@ -5,12 +5,14 @@
 // TODO: muted automatically, investigate should it be ran for JS or not
 // IGNORE_BACKEND: JS
 
-val p = { "OK" }()
+fun <T> eval(lambda: () -> T) = lambda()
+
+val p = eval { "OK" }
 
 val getter: String
-    get() = { "OK" }()
+    get() = eval { "OK" }
 
-fun f() = { "OK" }()
+fun f() = eval { "OK" }
 
 val obj = object : Function0<String> {
     override fun invoke() = "OK"

compiler/testData/codegen/box/closures/kt10044.kt

@@ -12,9 +12,8 @@ class Example : JClass {
     var result: String? = null
 
     init {
-        {
-            result = obj?.test()
-        }()
+        val lambda = { result = obj?.test() }
+        lambda()
     }
 }
 
@@ -26,9 +25,8 @@ class Example2 : JClass {
     var result: String? = null
 
     init {
-        {
-            result = obj?.test()
-        }()
+        val lambda = { result = obj?.test() }
+        lambda()
     }
 }
 

compiler/testData/codegen/box/closures/kt4106.kt

@@ -1,8 +1,10 @@
+fun <T> eval(fn: () -> T) = fn()
+
 class Foo(private val s: String) {
     inner class Inner {
-        private val x = {
+        private val x = eval {
             this@Foo.s
-        }()
+        }
     }
 
     val f = Inner()