Add tests for JVM backend diagnostics with K2 light tree

In the vast majority of tests, diagnostics are reported at a slightly
different location in LT vs PSI. This is because in the light tree mode,
backend errors are reported basically on the start of the IR element,
which is for example the keyword "class" for a class and not its name as
in K1 or in K2+PSI. Similarly, the end of the diagnostic is at the
ending offset of the IR element.

Normally it would be a bit user-unfriendly to highlight the whole class
as red, starting from the keyword "class" and ending with the closing
brace "}". But remember that these are backend diagnostics in the K2+LT
mode, which is only possible in the compiler scenario, not in the IDE.
And in this case, the ending offset doesn't matter at all because it's
not presented to the user, and minor change in the starting offset is
not a problem as well.

There are some tests which legitimately fail in the LT mode because the
corresponding diagnostics haven't been supported. They will be dealt
with in subsequent commits:

  testPropertyInlineCycle
  testInlineCycle
  MultifileClasses.testJvmSynthetic
  testSuspendInlineCycle
  testIndirectInlineCycle

 #KT-59586

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/class.fir.kt

@@ -0,0 +1,6 @@
+// COMPARE_WITH_LIGHT_TREE
+
+class C {
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/class.kt

@@ -1,5 +1,6 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 class C {
     <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
     <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/classObject.fir.kt

@@ -0,0 +1,8 @@
+// COMPARE_WITH_LIGHT_TREE
+
+class C {
+    companion object {
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+    }
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/classObject.kt

@@ -1,7 +1,8 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 class C {
     companion object {
         <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
         <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
     }
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/classPropertyInConstructor.fir.kt

@@ -0,0 +1,5 @@
+// COMPARE_WITH_LIGHT_TREE
+
+class C(<!CONFLICTING_JVM_DECLARATIONS!>val x: Int<!>) {
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/classPropertyInConstructor.kt

@@ -1,4 +1,5 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 class C(<!CONFLICTING_JVM_DECLARATIONS!>val x: Int<!>) {
     <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/extensionFunctionAndNormalFunction.fir.kt

@@ -0,0 +1,7 @@
+// COMPARE_WITH_LIGHT_TREE
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class C {
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun foo(x: Any)<!> {}<!>
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun Any.foo()<!> {}<!>
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/extensionFunctionAndNormalFunction.kt

@@ -1,4 +1,4 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class C {

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/extensionPropertyAndFunction.fir.kt

@@ -1,7 +1,8 @@
+// COMPARE_WITH_LIGHT_TREE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class C {
-    <!CONFLICTING_JVM_DECLARATIONS!>fun getX(t: Any)<!> = 1
-    <!CONFLICTING_JVM_DECLARATIONS!>val Any.x: Int<!>
-        get() = 1
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX(t: Any)<!> = 1<!>
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val Any.x: Int<!>
+        get() = 1<!>
 }

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/extensionPropertyAndFunction.kt

@@ -1,3 +1,4 @@
+// COMPARE_WITH_LIGHT_TREE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class C {

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/functionAndSetter.fir.kt

@@ -0,0 +1,8 @@
+// COMPARE_WITH_LIGHT_TREE
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class C {
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun setX(x: Int)<!> {}<!>
+
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>var x: Int<!> = 1<!>
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/functionAndSetter.kt

@@ -1,8 +1,8 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class C {
     <!CONFLICTING_JVM_DECLARATIONS!>fun setX(x: Int)<!> {}
 
     <!CONFLICTING_JVM_DECLARATIONS!>var x: Int<!> = 1
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/functionAndVar.fir.kt

@@ -1,8 +1,9 @@
+// COMPARE_WITH_LIGHT_TREE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class C {
-    <!CONFLICTING_JVM_DECLARATIONS!>fun setX(x: Int)<!> {}
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun setX(x: Int)<!> {}<!>
 
-    <!CONFLICTING_JVM_DECLARATIONS!>var x: Int<!> = 1
-        set(v) {}
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>var x: Int<!> = 1
+        set(v) {}<!>
 }

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/functionAndVar.kt

@@ -1,3 +1,4 @@
+// COMPARE_WITH_LIGHT_TREE
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class C {
@@ -5,4 +6,4 @@ class C {
 
     var x: Int = 1
         <!CONFLICTING_JVM_DECLARATIONS!>set(v)<!> {}
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/localClass.fir.kt

@@ -0,0 +1,8 @@
+// COMPARE_WITH_LIGHT_TREE
+
+fun foo() {
+    class C {
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+    }
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/localClass.kt

@@ -1,7 +1,8 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 fun foo() {
     class C {
         <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
         <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
     }
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/localClassInClass.fir.kt

@@ -0,0 +1,10 @@
+// COMPARE_WITH_LIGHT_TREE
+
+class Outer {
+    fun foo() {
+        class C {
+            <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+            <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+        }
+    }
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/localClassInClass.kt

@@ -1,4 +1,5 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 class Outer {
     fun foo() {
         class C {
@@ -6,4 +7,4 @@ class Outer {
             <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
         }
     }
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/nestedClass.fir.kt

@@ -0,0 +1,8 @@
+// COMPARE_WITH_LIGHT_TREE
+
+class B {
+    class C {
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+    }
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/nestedClass.kt

@@ -1,7 +1,8 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 class B {
     class C {
         <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
         <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
     }
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/object.fir.kt

@@ -0,0 +1,6 @@
+// COMPARE_WITH_LIGHT_TREE
+
+object C {
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/object.kt

@@ -1,5 +1,6 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 object C {
     <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
     <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/objectExpression.fir.kt

@@ -0,0 +1,7 @@
+// COMPARE_WITH_LIGHT_TREE
+
+fun foo() =
+    object {
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+    }

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/objectExpression.kt

@@ -1,6 +1,7 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 fun foo() =
     object {
         <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
         <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
-    }
+    }

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/objectExpressionInConstructor.fir.kt

@@ -0,0 +1,8 @@
+// COMPARE_WITH_LIGHT_TREE
+
+class Outer {
+    val x = object {
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+        <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
+    }
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/objectExpressionInConstructor.kt

@@ -1,7 +1,8 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 class Outer {
     val x = object {
         <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
         <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
     }
-}
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/topLevel.fir.kt

@@ -0,0 +1,4 @@
+// COMPARE_WITH_LIGHT_TREE
+
+<!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x<!> = 1<!>
+<!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/topLevel.kt

@@ -1,3 +1,4 @@
-// FIR_IDENTICAL
+// COMPARE_WITH_LIGHT_TREE
+
 <!CONFLICTING_JVM_DECLARATIONS!>val x<!> = 1
-<!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
+<!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/topLevelGetter.fir.kt

@@ -1,3 +1,5 @@
-<!CONFLICTING_JVM_DECLARATIONS!>val x: Int<!>
-    get() = 1
-<!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
+// COMPARE_WITH_LIGHT_TREE
+
+<!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x: Int<!>
+    get() = 1<!>
+<!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/topLevelGetter.kt

@@ -1,3 +1,5 @@
+// COMPARE_WITH_LIGHT_TREE
+
 val x: Int
     <!CONFLICTING_JVM_DECLARATIONS!>get()<!> = 1
-<!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
+<!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/trait.fir.kt

@@ -1,5 +1,7 @@
+// COMPARE_WITH_LIGHT_TREE
+
 interface T {
-    <!CONFLICTING_JVM_DECLARATIONS!>val x: Int<!>
-        get() = 1
-    <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>val x: Int<!>
+        get() = 1<!>
+    <!CONFLICTING_JVM_DECLARATIONS{LT}!><!CONFLICTING_JVM_DECLARATIONS{PSI}!>fun getX()<!> = 1<!>
 }

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/functionAndProperty/trait.kt

@@ -1,5 +1,7 @@
+// COMPARE_WITH_LIGHT_TREE
+
 interface T {
     val x: Int
         <!CONFLICTING_JVM_DECLARATIONS!>get()<!> = 1
     <!CONFLICTING_JVM_DECLARATIONS!>fun getX()<!> = 1
-}
+}