when generating coercion, take into account the original type of the expression

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

@@ -26,7 +26,8 @@ class CoercionValue(
 ) : StackValue(castType, value.canHaveSideEffects()) {
 
     override fun putSelector(type: Type, v: InstructionAdapter) {
-        value.putSelector(castType, v)
+        value.putSelector(value.type, v)
+        StackValue.coerce(value.type, castType, v)
         StackValue.coerce(castType, type, v)
     }
 

compiler/testData/codegen/boxWithStdlib/intrinsics/charToInt.kt

@@ -0,0 +1,8 @@
+fun box(): String {
+    val x: Any = 'A'
+    var y = 0
+    if (x is Char) {
+        y = x.toInt()
+    }
+    return if (y == 65) "OK" else "fail"
+}

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

@@ -1588,6 +1588,12 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxWithStdlib/intrinsics"), Pattern.compile("^(.+)\\.kt$"), true);
         }
 
+        @TestMetadata("charToInt.kt")
+        public void testCharToInt() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/intrinsics/charToInt.kt");
+            doTestWithStdlib(fileName);
+        }
+
         @TestMetadata("defaultObjectMapping.kt")
         public void testDefaultObjectMapping() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/intrinsics/defaultObjectMapping.kt");