JVM_IR: fix primitive comparison optimizations

1. the `primitive == object?.something` fusion should not apply to
    `primitive.equals(object?.something)` because it can't;

 2. coercions to Int are there for a reason - don't remove them;

 3. better optimize `primitive == object?.something` -- the result
    should be subject to if-null fusion, so it needs to have a specific
    pattern that resembles safe calls.

 #KT-47597 Fixed

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -1478,6 +1478,18 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/binaryOp/eqNullableDoublesWithTP.kt");
         }
 
+        @Test
+        @TestMetadata("eqNullableShortToShort.kt")
+        public void testEqNullableShortToShort() throws Exception {
+            runTest("compiler/testData/codegen/box/binaryOp/eqNullableShortToShort.kt");
+        }
+
+        @Test
+        @TestMetadata("eqNullableToPrimitiveWithSideEffects.kt")
+        public void testEqNullableToPrimitiveWithSideEffects() throws Exception {
+            runTest("compiler/testData/codegen/box/binaryOp/eqNullableToPrimitiveWithSideEffects.kt");
+        }
+
         @Test
         @TestMetadata("intrinsic.kt")
         public void testIntrinsic() throws Exception {
@@ -1543,6 +1555,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
         public void testOverflowLong() throws Exception {
             runTest("compiler/testData/codegen/box/binaryOp/overflowLong.kt");
         }
+
+        @Test
+        @TestMetadata("primitiveEqualsSafeCall.kt")
+        public void testPrimitiveEqualsSafeCall() throws Exception {
+            runTest("compiler/testData/codegen/box/binaryOp/primitiveEqualsSafeCall.kt");
+        }
     }
 
     @Nested