FIR: Add more tests for delegate inference

compiler/fir/analysis-tests/testData/resolve/delegates/delegateWithArgInference.fir.txt

@@ -0,0 +1,27 @@
+FILE: delegateWithArgInference.kt
+    public final class Delegate<T> : R|kotlin/Any| {
+        public constructor<T>(data: R|T|): R|Delegate<T>| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final val data: R|T| = R|<local>/data|
+            public get(): R|T|
+
+        public final operator fun getValue(thisRef: R|kotlin/Nothing?|, prop: R|kotlin/reflect/KProperty<*>|): R|T| {
+            ^getValue this@R|/Delegate|.R|/Delegate.data|
+        }
+
+    }
+    public final fun makeIntDelegate(t: R|kotlin/Int|): R|Delegate<kotlin/Int>| {
+        ^makeIntDelegate R|/Delegate.Delegate|<R|kotlin/Int|>(R|<local>/t|)
+    }
+    public final fun <M> materialize(): R|M| {
+        ^materialize Null(null)!!
+    }
+    public final fun <Q> id(v: R|Q|): R|Q| {
+        ^id R|<local>/v|
+    }
+    public final val x: R|kotlin/Int|by R|/makeIntDelegate|(R|/id|<R|kotlin/Int|>(R|/materialize|<R|kotlin/Int|>()))
+        public get(): R|kotlin/Int| {
+            ^ D|/x|.R|SubstitutionOverride</Delegate.getValue: R|kotlin/Int|>|(Null(null), ::R|/x|)
+        }

compiler/fir/analysis-tests/testData/resolve/delegates/delegateWithArgInference.kt

@@ -0,0 +1,16 @@
+import kotlin.reflect.KProperty
+
+class Delegate<T>(val data: T) {
+    operator fun getValue(thisRef: Nothing?, prop: KProperty<*>): T = data
+}
+
+fun makeIntDelegate(t: Int): Delegate<Int> = Delegate(t)
+fun <TT> makeDelegate(t: TT): Delegate<TT> = Delegate(t)
+fun <M> materialize(): M = null!!
+fun <M2> materialize2(): M2 = null!!
+fun <Q> id(v: Q): Q = v
+
+val x by makeIntDelegate(run {
+    val x: String = materialize()
+    materialize2()
+})

compiler/fir/analysis-tests/testData/resolve/delegates/receiverInference.fir.txt

@@ -0,0 +1,37 @@
+FILE: receiverInference.kt
+    public abstract interface XEntity : R|kotlin/Any| {
+    }
+    public final class Provider<out R> : R|kotlin/Any| {
+        public constructor<out R>(): R|Provider<R>| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final operator fun provideDelegate(thisRef: R|XEntity|, prop: R|kotlin/Any|): R|R| {
+            ^provideDelegate Null(null)!!
+        }
+
+    }
+    public final class Prop<E, V> : R|kotlin/Any| {
+        public constructor<E, V>(): R|Prop<E, V>| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final operator fun getValue(receiver: R|E|, prop: R|kotlin/Any|): R|V| {
+            ^getValue Null(null)!!
+        }
+
+    }
+    public final fun <R : R|XEntity|, V> mkProp(): R|Provider<Prop<R, V>>| {
+        ^mkProp R|/Provider.Provider|<R|Prop<R, V>|>()
+    }
+    public final class MyEnt : R|XEntity| {
+        public constructor(): R|MyEnt| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final val d: R|kotlin/String|by R|/mkProp|<R|MyEnt|, R|kotlin/String|>().R|SubstitutionOverride</Provider.provideDelegate: R|Prop<Stub (builder inference): TypeVariable(_R), Stub (builder inference): TypeVariable(_V)>|>|(this@R|/MyEnt|, ::R|/MyEnt.d|)
+            public get(): R|kotlin/String| {
+                ^ this@R|/MyEnt|.D|/MyEnt.d|.R|SubstitutionOverride</Prop.getValue: R|Stub (builder inference): TypeVariable(_V)|>|(this@R|/MyEnt|, ::R|/MyEnt.d|)
+            }
+
+    }

compiler/fir/analysis-tests/testData/resolve/delegates/receiverInference.kt

@@ -0,0 +1,17 @@
+import kotlin.reflect.KProperty
+
+
+interface XEntity
+class Provider<out R> {
+    operator fun provideDelegate(thisRef: XEntity, prop: Any): R = null!!
+}
+
+class Prop<E, V> {
+    operator fun getValue(receiver: E, prop: Any): V = null!!
+}
+
+fun <R: XEntity, V> mkProp(): Provider<Prop<R, V>> = Provider()
+
+class MyEnt: XEntity {
+    val d: String by mkProp()
+}