JVM IR: Turn static callable references into singletons

compiler/testData/codegen/box/callableReference/function/staticFunctionReference.kt

@@ -0,0 +1,22 @@
+// TARGET_BACKEND: JVM
+
+var capturedRef: ((Int) -> Int)? = null
+
+fun ref(x: Int) = x
+
+fun updateCapturedRef(): Boolean {
+    val r = ::ref
+    if (capturedRef == null) {
+        capturedRef = r
+    } else if (capturedRef !== r) {
+        return false
+    }
+    return true
+}
+
+fun box(): String {
+    updateCapturedRef()
+    if (!updateCapturedRef())
+        return "FAIL"
+    return "OK"
+}

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

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+
+var capturedLambda: ((Int) -> Int)? = null
+
+fun captureLambda(): Boolean {
+    val lambda = { x: Int -> x + 1 }
+    if (capturedLambda == null) {
+        capturedLambda = lambda
+    } else if (capturedLambda !== lambda) {
+        return false
+    }
+    return true
+}
+
+fun box(): String {
+    captureLambda()
+    if (!captureLambda())
+        return "FAIL"
+    return "OK"
+}

compiler/testData/codegen/box/coroutines/tailCallOptimizations/unit/override5_ir.txt

@@ -3,19 +3,10 @@ public interface Base {
     public abstract @org.jetbrains.annotations.Nullable method generic(@org.jetbrains.annotations.NotNull p0: kotlin.coroutines.Continuation): java.lang.Object
 }
 
-@kotlin.Metadata
-public final class Override5Kt$box$1$invokeSuspend$$inlined$inlineMe$1$2 {
-    inner class Override5Kt$box$1$invokeSuspend$$inlined$inlineMe$1
-    inner class Override5Kt$box$1$invokeSuspend$$inlined$inlineMe$1$2
-    public method <init>(): void
-    public synthetic bridge @org.jetbrains.annotations.Nullable method invoke(): java.lang.Object
-    public final method invoke(): void
-}
-
 @kotlin.Metadata
 public final class Override5Kt$box$1$invokeSuspend$$inlined$inlineMe$1 {
     inner class Override5Kt$box$1$invokeSuspend$$inlined$inlineMe$1
-    inner class Override5Kt$box$1$invokeSuspend$$inlined$inlineMe$1$2
+    inner class Override5Kt$inlineMe$1$generic$2
     public method <init>(): void
     public @org.jetbrains.annotations.Nullable method generic(@org.jetbrains.annotations.NotNull p0: kotlin.coroutines.Continuation): java.lang.Object
 }
@@ -46,8 +37,10 @@ public final class Override5Kt$inlineMe$1$generic$1 {
 
 @kotlin.Metadata
 public final class Override5Kt$inlineMe$1$generic$2 {
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: Override5Kt$inlineMe$1$generic$2
     inner class Override5Kt$inlineMe$1
     inner class Override5Kt$inlineMe$1$generic$2
+    static method <clinit>(): void
     public method <init>(): void
     public synthetic bridge @org.jetbrains.annotations.Nullable method invoke(): java.lang.Object
     public final method invoke(): void