Fixed 'IDEA-128594: Variable type incorrectly set to boolean'

src/de/fernflower/modules/decompiler/exps/FunctionExprent.java

@@ -368,43 +368,48 @@ public class FunctionExprent extends Exprent {
 			break;
 		case FUNCTION_AND:
 		case FUNCTION_OR:
-		case FUNCTION_XOR:
-			if(type1.type == CodeConstants.TYPE_BOOLEAN && 
-						((type1.convinfo & VarType.FALSEBOOLEAN) != 0 || type2.type != CodeConstants.TYPE_BOOLEAN)) {
-				result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
-			} 
-			if(type2.type == CodeConstants.TYPE_BOOLEAN && 
-					((type2.convinfo & VarType.FALSEBOOLEAN) != 0 || type1.type != CodeConstants.TYPE_BOOLEAN)) {
-				result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
+		case FUNCTION_XOR: 
+			{
+    			boolean param1_false_boolean = type1.isFalseBoolean() || (param1.type == Exprent.EXPRENT_CONST && !((ConstExprent)param1).hasBooleanValue()); 
+    			boolean param2_false_boolean = type1.isFalseBoolean() || (param2.type == Exprent.EXPRENT_CONST && !((ConstExprent)param2).hasBooleanValue()); 
+    
+    			if(param1_false_boolean || param2_false_boolean) {
+    				if(type1.type == CodeConstants.TYPE_BOOLEAN) {
+    					result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
+    				}
+    				
+    				if(type2.type == CodeConstants.TYPE_BOOLEAN) {
+    					result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
+    				}
+    			}
 			}
 			break;
 		case FUNCTION_EQ:
 		case FUNCTION_NE:
-			
-			if(type1.type == CodeConstants.TYPE_BOOLEAN) {
-				
-				if(type2.isStrictSuperset(type1)) {
-					result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
-				} else {
-					if(param1.type == Exprent.EXPRENT_CONST && !((ConstExprent)param1).hasBooleanValue()) {
-						if(param2.type != Exprent.EXPRENT_CONST || !((ConstExprent)param2).hasBooleanValue()) { // variable or not boolean constant
-							result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
-						}
-					}
-				}
-			}
-			
-			if(type2.type == CodeConstants.TYPE_BOOLEAN) {
-				
-				if(type1.isStrictSuperset(type2)) {
-					result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
-				} else {
-					if(param2.type == Exprent.EXPRENT_CONST && !((ConstExprent)param2).hasBooleanValue()) {
-						if(param1.type != Exprent.EXPRENT_CONST || !((ConstExprent)param1).hasBooleanValue()) { // variable or not boolean constant
-							result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
-						}
-					}
-				}
+			{
+    			if(type1.type == CodeConstants.TYPE_BOOLEAN) {
+    				
+    				if(type2.isStrictSuperset(type1)) {
+    					
+    					result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
+    					
+    				} else { // both are booleans
+    					
+    					boolean param1_false_boolean = type1.isFalseBoolean() || (param1.type == Exprent.EXPRENT_CONST && !((ConstExprent)param1).hasBooleanValue()); 
+    					boolean param2_false_boolean = type1.isFalseBoolean() || (param2.type == Exprent.EXPRENT_CONST && !((ConstExprent)param2).hasBooleanValue()); 
+    					
+    					if(param1_false_boolean || param2_false_boolean) {
+    						result.addMinTypeExprent(param1, VarType.VARTYPE_BYTECHAR);
+    						result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
+    					}
+    				}
+    				
+    			} else if(type2.type == CodeConstants.TYPE_BOOLEAN) {
+    				
+    				if(type1.isStrictSuperset(type2)) {
+    					result.addMinTypeExprent(param2, VarType.VARTYPE_BYTECHAR);
+    				} 
+    			}
 			}
 		}
 		

src/de/fernflower/struct/gen/VarType.java

@@ -114,7 +114,11 @@ public class VarType {  // TODO: optimize switch
 		v.convinfo = convinfo;
 		return v;
 	}
-	
+
+	public boolean isFalseBoolean() {
+		return (convinfo & VarType.FALSEBOOLEAN) != 0;
+	}
+
 	public boolean isSuperset(VarType val) {
 
 		return this.equals(val) || this.isStrictSuperset(val);
@@ -165,6 +169,10 @@ public class VarType {  // TODO: optimize switch
 	// type1 and type2 must not be null
 	public static VarType getCommonMinType(VarType type1, VarType type2) {
 
+		if(type1.type == CodeConstants.TYPE_BOOLEAN && type2.type == CodeConstants.TYPE_BOOLEAN) { // special case booleans
+			return type1.isFalseBoolean() ? type2 : type1; 
+		}
+		
 		if(type1.isSuperset(type2)) {
 			return type2;
 		} else if(type2.isSuperset(type1)) {
@@ -189,6 +197,10 @@ public class VarType {  // TODO: optimize switch
 	// type1 and type2 must not be null
 	public static VarType getCommonSupertype(VarType type1, VarType type2) {
 		
+		if(type1.type == CodeConstants.TYPE_BOOLEAN && type2.type == CodeConstants.TYPE_BOOLEAN) { // special case booleans
+			return type1.isFalseBoolean() ? type1 : type2; 
+		}
+		
 		if(type1.isSuperset(type2)) {
 			return type1;
 		} else if(type2.isSuperset(type1)) {
@@ -232,12 +244,17 @@ public class VarType {  // TODO: optimize switch
 	}
 	
 	public boolean equals(Object o) {
-    if(o == this) return true;
-    if(o == null || !(o instanceof VarType)) return false;
+		
+		if(o == this) {
+			return true;
+		}
+		
+		if(o == null || !(o instanceof VarType)) {
+			return false;
+		}
 
-		VarType vt = (VarType)o;
-		return type == vt.type && arraydim == vt.arraydim &&
-				InterpreterUtil.equalObjects(value, vt.value);
+		VarType vt = (VarType) o;
+		return type == vt.type && arraydim == vt.arraydim && InterpreterUtil.equalObjects(value, vt.value);
 	}
 
 	private void parseTypeString(String strtype, boolean cltype) {