Missing tests added

compiler/testData/codegen/box/functions/tailRecursion/infixCall.kt

@@ -0,0 +1,8 @@
+tailRecursive fun Int.test(x : Int) : Int {
+    if (this > 1) {
+        return (this - 1) test x
+    }
+    return this
+}
+
+fun box() : String = if (1000000.test(1000000) == 1) "OK" else "FAIL"

compiler/testData/codegen/box/functions/tailRecursion/returnIf.kt

@@ -0,0 +1,12 @@
+tailRecursive fun test(x : Int) : Int {
+    return if (x == 1) {
+        <!NON_TAIL_RECURSIVE_CALL!>test<!>(x - 1)
+        1 + <!NON_TAIL_RECURSIVE_CALL!>test<!>(x - 1)
+    } else if (x > 0) {
+        test(x - 1)
+    } else {
+        0
+    }
+}
+
+fun box() : String = if (test(1000000) == 1) "OK" else "FAIL"

compiler/testData/diagnostics/tests/tailCalls/extensionTailCall.kt

@@ -0,0 +1,4 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+tailRecursive fun Int.foo(x: Int) {
+    return 1.foo(2)
+}

compiler/testData/diagnostics/tests/tailCalls/infixRecursiveCall.kt

@@ -0,0 +1,4 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+tailRecursive fun Int.foo(x: Int) {
+    return 1 foo 2
+}

compiler/testData/diagnostics/tests/tailCalls/recursiveCallInLambda.kt

@@ -0,0 +1,8 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+<!NO_TAIL_CALLS_FOUND!>tailRecursive fun foo()<!> {
+    run {
+        <!NON_TAIL_RECURSIVE_CALL!>foo<!>()
+    }
+}
+
+fun run(a: Any) {}

compiler/testData/diagnostics/tests/tailCalls/recursiveCallInLocalFunction.kt

@@ -0,0 +1,5 @@
+<!NO_TAIL_CALLS_FOUND!>tailRecursive fun foo()<!> {
+    fun bar() {
+        <!NON_TAIL_RECURSIVE_CALL!>foo<!>()
+    }
+}

compiler/testData/diagnostics/tests/tailCalls/returnInParentheses.kt

@@ -0,0 +1,3 @@
+tailRecursive fun foo() {
+    (return foo())
+}

compiler/testData/diagnostics/tests/tailCalls/tailCallInBlockInParentheses.kt

@@ -0,0 +1,6 @@
+tailRecursive fun foo() {
+    return if (true) {
+        (foo())
+    }
+    else Unit.VALUE
+}

compiler/testData/diagnostics/tests/tailCalls/tailCallInParentheses.kt

@@ -0,0 +1,3 @@
+tailRecursive fun foo() {
+    return (foo())
+}