Generate intrinsic-based numeric comparison only for FP types

compiler/testData/codegen/box/primitiveTypes/equalityWithObject/intEqualsNullableInt.kt

@@ -0,0 +1,15 @@
+// !LANGUAGE: +ProperIeee754Comparisons
+
+fun eq1(a: Int?, b: Int) = a == b
+
+fun eq2(a: Int, b: Int?) = a == b
+
+fun eq3(a: Int?, b: Int?) = a == b
+
+fun box(): String =
+    when {
+        !eq1(1, 1) -> "Fail 1"
+        !eq2(1, 1) -> "Fail 2"
+        !eq3(1, 1) -> "Fail 3"
+        else -> "OK"
+    }

compiler/testData/codegen/box/primitiveTypes/equalityWithObject/intEqualsNullableIntWithSmartCasts.kt

@@ -0,0 +1,22 @@
+// !LANGUAGE: +ProperIeee754Comparisons
+
+fun eq1(a: Any?, b: Any?) =
+    a is Int? && b is Int && a == b
+
+fun eq2(a: Any?, b: Any?) =
+    a is Int && b is Int? && a == b
+
+fun eq3(a: Any?, b: Any?) =
+    a is Int && b is Int && a == b
+
+fun eq4(a: Any?, b: Any?) =
+    a is Int? && b is Int? && a == b
+
+fun box(): String =
+    when {
+        !eq1(1, 1) -> "Fail 1"
+        !eq2(1, 1) -> "Fail 2"
+        !eq3(1, 1) -> "Fail 3"
+        !eq4(1, 1) -> "Fail 4"
+        else -> "OK"
+    }

compiler/testData/codegen/box/primitiveTypes/equalityWithObject/whenIntAsNullableAny.kt

@@ -0,0 +1,11 @@
+// !LANGUAGE: +ProperIeee754Comparisons
+
+fun test(x: Any?): String {
+    if (x !is Int) return "Fail 1"
+    when (x) {
+        0 -> return "OK"
+        else -> return "Fail 2"
+    }
+}
+
+fun box(): String = test(0)