Fix specialization inconsistency in foreign.__bool__

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/foreign/ForeignObjectBuiltins.java

@@ -141,54 +141,27 @@ protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFa
     @Builtin(name = __BOOL__, minNumOfPositionalArgs = 1)
     @GenerateNodeFactory
     abstract static class BoolNode extends PythonUnaryBuiltinNode {
-        @Specialization(guards = "lib.isBoolean(receiver)", limit = "getCallSiteInlineCacheMaxDepth()")
+        @Specialization(limit = "getCallSiteInlineCacheMaxDepth()")
         static boolean bool(Object receiver,
                         @CachedLibrary("receiver") InteropLibrary lib) {
             try {
-                return lib.asBoolean(receiver);
-            } catch (UnsupportedMessageException e) {
-                throw CompilerDirectives.shouldNotReachHere(e);
-            }
-        }
-
-        @Specialization(guards = "lib.fitsInLong(receiver)", limit = "getCallSiteInlineCacheMaxDepth()")
-        static boolean integer(Object receiver,
-                        @CachedLibrary("receiver") InteropLibrary lib) {
-            try {
-                return lib.asLong(receiver) != 0;
-            } catch (UnsupportedMessageException e) {
-                throw CompilerDirectives.shouldNotReachHere(e);
-            }
-        }
-
-        @Specialization(guards = "lib.fitsInDouble(receiver)", limit = "getCallSiteInlineCacheMaxDepth()")
-        static boolean floatingPoint(Object receiver,
-                        @CachedLibrary("receiver") InteropLibrary lib) {
-            try {
-                return lib.asDouble(receiver) != 0.0;
-            } catch (UnsupportedMessageException e) {
-                throw CompilerDirectives.shouldNotReachHere(e);
-            }
-        }
-
-        @Specialization(guards = "lib.hasArrayElements(receiver)", limit = "getCallSiteInlineCacheMaxDepth()")
-        static boolean array(Object receiver,
-                        @CachedLibrary("receiver") InteropLibrary lib) {
-            try {
-                return lib.getArraySize(receiver) > 0;
+                if (lib.isBoolean(receiver)) {
+                    return lib.asBoolean(receiver);
+                }
+                if (lib.fitsInLong(receiver)) {
+                    return lib.asLong(receiver) != 0;
+                }
+                if (lib.fitsInDouble(receiver)) {
+                    return lib.asDouble(receiver) != 0.0;
+                }
+                if (lib.hasArrayElements(receiver)) {
+                    return lib.getArraySize(receiver) != 0;
+                }
+                return !lib.isNull(receiver);
             } catch (UnsupportedMessageException e) {
                 throw CompilerDirectives.shouldNotReachHere(e);
             }
         }
-
-        @Specialization(guards = {
-                        "!lib.isBoolean(receiver)", "!lib.fitsInLong(receiver)",
-                        "!lib.fitsInDouble(receiver)", "!lib.hasArrayElements(receiver)"
-        }, limit = "getCallSiteInlineCacheMaxDepth()")
-        static boolean generic(Object receiver,
-                        @CachedLibrary("receiver") InteropLibrary lib) {
-            return !lib.isNull(receiver);
-        }
     }
 
     static Object[] unpackForeignArray(Object left, InteropLibrary lib, PForeignToPTypeNode convert) {