Primary constructor generation.

compiler/testData/ir/irText/classes/classMembers.txt

@@ -1,7 +1,16 @@
 FILE /classMembers.kt
   CLASS CLASS C
+    FUN public constructor C(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int, /*2*/ z: kotlin.Int = ...)
+      BLOCK_BODY
+        INITIALIZE_PROPERTY y
+        INITIALIZE_PROPERTY z
+        INITIALIZE_PROPERTY property
     PROPERTY public final val y: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR y type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
     PROPERTY public final var z: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR z type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
     FUN public constructor C()
       BLOCK_BODY
         CALL .<init> type=C operator=DELEGATING_CONSTRUCTOR_CALL

compiler/testData/ir/irText/classes/primaryConstructor.kt

@@ -0,0 +1,13 @@
+class Test1(val x: Int, val y: Int)
+
+class Test2(x: Int, val y: Int) {
+    val x = x
+}
+
+class Test3(x: Int, val y: Int) {
+    val x: Int
+
+    init {
+        this.x = x
+    }
+}

compiler/testData/ir/irText/classes/primaryConstructor.txt

@@ -0,0 +1,34 @@
+FILE /primaryConstructor.kt
+  CLASS CLASS Test1
+    FUN public constructor Test1(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int)
+      BLOCK_BODY
+        INITIALIZE_PROPERTY x
+        INITIALIZE_PROPERTY y
+    PROPERTY public final val x: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR x type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+    PROPERTY public final val y: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR y type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+  CLASS CLASS Test2
+    FUN public constructor Test2(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int)
+      BLOCK_BODY
+        INITIALIZE_PROPERTY y
+        INITIALIZE_PROPERTY x
+    PROPERTY public final val y: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR y type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+    PROPERTY public final val x: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR x type=kotlin.Int operator=null
+  CLASS CLASS Test3
+    FUN public constructor Test3(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int)
+      BLOCK_BODY
+        INITIALIZE_PROPERTY y
+        BLOCK type=kotlin.Unit operator=null
+          INITIALIZE_PROPERTY x
+            GET_VAR x type=kotlin.Int operator=null
+    PROPERTY public final val y: kotlin.Int getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR y type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+    PROPERTY public final val x: kotlin.Int getter=null setter=null