Deprecate simplification of complex boolean constant expressions in whens and loops

^KT-39883 In Progress

compiler/testData/diagnostics/tests/controlFlowAnalysis/loopWithNonTrivialBooleanConst_error.kt

@@ -0,0 +1,73 @@
+// LANGUAGE: +ProhibitSimplificationOfNonTrivialConstBooleanExpressions
+// DIAGNOSTICS: -UNUSED_VARIABLE
+
+fun test_1() {
+    while (true) {
+
+    }
+    <!UNREACHABLE_CODE!>val x = 1<!>
+}
+
+fun test_2() {
+    while (true || false) {
+
+    }
+    val x = 1
+}
+
+fun test_3() {
+    while (1 == 1) {
+
+    }
+    val x = 1
+}
+
+fun test_4() {
+    while (false) {
+        val x = 1
+    }
+    val y = 2
+}
+
+fun test_5() {
+    while (false && true) {
+        val x = 1
+    }
+    val y = 2
+}
+
+fun test_6() {
+    do {
+
+    } while (true)
+    <!UNREACHABLE_CODE!>val x = 1<!>
+}
+
+fun test_7() {
+    do {
+
+    } while (true || false)
+    val x = 1
+}
+
+fun test_8() {
+    do {
+
+    } while (1 == 1)
+    val x = 1
+}
+
+fun test_9() {
+    do {
+        val x = 1
+    } while (false)
+    val y = 2
+}
+
+fun test_10() {
+    do {
+        val x = 1
+    } while (false && true)
+    val y = 2
+}
+