[IR] Restore and fix ifConstVal test

It was accidentally dropped after KT-55196 fix.

compiler/testData/diagnostics/tests/modifiers/const/equals_after.fir.kt

@@ -0,0 +1,46 @@
+// !LANGUAGE: +IntrinsicConstEvaluation
+
+const val equalsBoolean1 = true.equals(true)
+const val equalsBoolean2 = false != true
+const val equalsBoolean3 = false.equals(1)
+const val equalsBoolean4 = <!EQUALITY_NOT_APPLICABLE!>false == 1<!>
+
+const val equalsChar1 = '1'.equals('2')
+const val equalsChar2 = '2' == '2'
+const val equalsChar3 = '1'.equals(1)
+const val equalsChar4 = <!EQUALITY_NOT_APPLICABLE!>'1' == 1<!>
+
+const val equalsByte1 = 1.toByte().equals(2.toByte())
+const val equalsByte2 = 2.toByte() == 2.toByte()
+const val equalsByte3 = 1.toByte().equals("1")
+const val equalsByte4 = <!EQUALITY_NOT_APPLICABLE!>1.toByte() == "1"<!>
+
+const val equalsShort1 = 1.toShort().equals(2.toShort())
+const val equalsShort2 = 2.toShort() == 2.toShort()
+const val equalsShort3 = 1.toShort().equals("1")
+const val equalsShort4 = <!EQUALITY_NOT_APPLICABLE!>1.toShort() == "1"<!>
+
+const val equalsInt1 = 1.equals(2)
+const val equalsInt2 = 2 == 2
+const val equalsInt3 = 1.equals("1")
+const val equalsInt4 = <!EQUALITY_NOT_APPLICABLE!>1 == "1"<!>
+
+const val equalsLong1 = 1L.equals(2L)
+const val equalsLong2 = 2L == 2L
+const val equalsLong3 = 1L.equals("1")
+const val equalsLong4 = <!EQUALITY_NOT_APPLICABLE!>1L == "1"<!>
+
+const val equalsFloat1 = 1.0f.equals(2.0f)
+const val equalsFloat2 = 2.0f == 2.0f
+const val equalsFloat3 = 1.0f.equals("1")
+const val equalsFloat4 = <!EQUALITY_NOT_APPLICABLE!>1.0f == "1"<!>
+
+const val equalsDoable1 = 1.0.equals(2.0)
+const val equalsDoable2 = 2.0 == 2.0
+const val equalsDoable3 = 1.0.equals("1")
+const val equalsDoable4 = <!EQUALITY_NOT_APPLICABLE!>1.0 == "1"<!>
+
+const val equalsString1 = "someStr".equals("123")
+const val equalsString2 = "someStr" == "otherStr"
+const val equalsString3 = "someStr".equals(1)
+const val equalsString4 = <!EQUALITY_NOT_APPLICABLE!>"someStr" == 1<!>

compiler/testData/diagnostics/tests/modifiers/const/equals_after.kt

@@ -1,4 +1,3 @@
-// FIR_IDENTICAL
 // !LANGUAGE: +IntrinsicConstEvaluation
 
 const val equalsBoolean1 = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>true.equals(true)<!>

compiler/testData/diagnostics/tests/modifiers/const/ifConstVal_after.fir.kt

@@ -4,19 +4,19 @@ const val flag = true
 const val value = 10
 
 const val condition = if (flag) "True" else "Error"
-const val withWhen = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>when (flag) {
+const val withWhen = when (flag) {
     true -> "True"
     else -> "Error"
-}<!>
+}
 const val withWhen2 = when {
     flag == true -> "True"
     else -> "Error"
 }
-const val withWhen3 = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>when(value) {
+const val withWhen3 = when(value) {
     10 -> "1"
     100 -> "2"
     else -> "3"
-}<!>
+}
 const val multibranchIf = if (value == 100) 1 else if (value == 1000) 2 else 3
 
 val nonConstFlag = true