When by String constants:

Generate TABLESWITCH/LOOKUPSWITCH bytecode operation for when operator by String constants

compiler/testData/codegen/boxWithStdlib/whenStringOptimization/sameHashCode.kt

@@ -0,0 +1,23 @@
+import kotlin.test.assertEquals
+
+fun foo(x : String) : String {
+    assert("abz]".hashCode() == "aby|".hashCode())
+
+    when (x) {
+        "abz]", "cde" -> return "abz_cde"
+        "aby|", "ghi", "abz]" -> return "aby_ghi"
+    }
+
+    return "other"
+}
+
+fun box() : String {
+    assertEquals("abz_cde", foo("abz]"))
+    assertEquals("abz_cde", foo("cde"))
+    assertEquals("aby_ghi", foo("aby|"))
+    assertEquals("aby_ghi", foo("ghi"))
+
+    assertEquals("other", foo("xyz"))
+
+    return "OK"
+}