Fix Linker.Option.critical(true)

* Array addresses are passed in int registers
* Fix shuffle index mask

Author: gilles-duboscq

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/runtime/panama/AbstractArgumentsCalculator.java

@@ -42,17 +42,17 @@ protected AbstractArgumentsCalculator(Platform platform, VMStorage[] callIntRegs
 
     protected static boolean isInt(Klass type) {
         return switch (type.getJavaKind()) {
-            case Boolean, Byte, Char, Short, Int, Long -> true;
+            case Boolean, Byte, Char, Short, Int, Long, Object -> true;
             case Float, Double -> false;
-            case Void, Illegal, Object, ReturnAddress -> throw EspressoError.shouldNotReachHere(type.getJavaKind().toString());
+            case Void, Illegal, ReturnAddress -> throw EspressoError.shouldNotReachHere(type.getJavaKind().toString());
         };
     }
 
     protected static boolean isFloat(Klass type) {
         return switch (type.getJavaKind()) {
-            case Boolean, Byte, Char, Short, Int, Long -> false;
+            case Boolean, Byte, Char, Short, Int, Long, Object -> false;
             case Float, Double -> true;
-            case Void, Illegal, Object, ReturnAddress -> throw EspressoError.shouldNotReachHere(type.getJavaKind().toString());
+            case Void, Illegal, ReturnAddress -> throw EspressoError.shouldNotReachHere(type.getJavaKind().toString());
         };
     }
 }

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/runtime/panama/DowncallStubs.java

@@ -245,7 +245,7 @@ public DowncallStub getStub(long downcallStub, EspressoContext ctx) {
 
     public static final class Shuffle {
         private static final int POINTER_ARG_FLAG = 1 << 31;
-        private static final int INDEX_ARG_MASK = 0x8FFF_FFFF;
+        private static final int INDEX_ARG_MASK = 0x7FFF_FFFF;
 
         private static int encode(int idx, NativeType type) {
             int res = idx;