Fix === comparison for primitive types

#KT-6590 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/StackValue.java

@@ -664,10 +664,10 @@ public abstract class StackValue {
             left.put(this.operandType, v);
             right.put(this.operandType, v);
             int opcode;
-            if (opToken == JetTokens.EQEQ) {
+            if (opToken == JetTokens.EQEQ || opToken == JetTokens.EQEQEQ) {
                 opcode = jumpIfFalse ? IFNE : IFEQ;
             }
-            else if (opToken == JetTokens.EXCLEQ) {
+            else if (opToken == JetTokens.EXCLEQ || opToken == JetTokens.EXCLEQEQEQ) {
                 opcode = jumpIfFalse ? IFEQ : IFNE;
             }
             else if (opToken == JetTokens.GT) {

compiler/testData/codegen/box/primitiveTypes/kt6590_identityEquals.kt

@@ -0,0 +1,15 @@
+fun box(): String {
+    val i: Int = 10000
+    if (!(i === i)) return "Fail int ==="
+    if (i !== i) return "Fail int !=="
+
+    val j: Long = 123L
+    if (!(j === j)) return "Fail long ==="
+    if (j !== j) return "Fail long !=="
+
+    val d: Double = 3.14
+    if (!(d === d)) return "Fail double ==="
+    if (d !== d) return "Fail double !=="
+
+    return "OK"
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java

@@ -5550,6 +5550,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("kt6590_identityEquals.kt")
+        public void testKt6590_identityEquals() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/primitiveTypes/kt6590_identityEquals.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt665.kt")
         public void testKt665() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/primitiveTypes/kt665.kt");