Deprecate floating point to integral types lesser than Int #KT-30360

generators/builtins/primitives.kt

@@ -344,6 +344,10 @@ class GeneratePrimitives(out: PrintWriter) : BuiltInsSourceGenerator(out) {
     }
 
     private fun generateConversions(kind: PrimitiveType) {
+        fun isConversionDeprecated(otherKind: PrimitiveType): Boolean {
+            return kind in PrimitiveType.floatingPoint && otherKind in listOf(PrimitiveType.BYTE, PrimitiveType.SHORT)
+        }
+
         val thisName = kind.capitalized
         for (otherKind in PrimitiveType.exceptBoolean) {
             val otherName = otherKind.capitalized
@@ -367,6 +371,11 @@ class GeneratePrimitives(out: PrintWriter) : BuiltInsSourceGenerator(out) {
                 "    /**\n     * Converts this [$thisName] value to [$otherName].\n     *\n" + detail.replaceIndent("     ")
             }
             out.println(doc)
+
+            if (isConversionDeprecated(otherKind)) {
+                out.println("    @Deprecated(\"Unclear conversion. To achieve the same result convert to Int explicitly and then to $otherName.\", ReplaceWith(\"toInt().to$otherName()\"))")
+            }
+
             out.println("    public override fun to$otherName(): $otherName")
         }
     }

generators/evaluate/GenerateOperationsMap.kt

@@ -27,7 +27,8 @@ fun generate(): String {
     val sb = StringBuilder()
     val p = Printer(sb)
     p.println(File("license/COPYRIGHT.txt").readText())
-    p.println("@file:Suppress(\"DEPRECATION_ERROR\")")
+    p.println("@file:Suppress(\"DEPRECATION\", \"DEPRECATION_ERROR\")")
+
     p.println()
     p.println("package org.jetbrains.kotlin.resolve.constants.evaluate")
     p.println()