dialects: (builtin) Fix documentation for parsing of bools, and add c…

…onversion to Python bool (#3689)

tests/dialects/test_builtin.py

@@ -10,6 +10,7 @@
     AnyVectorType,
     ArrayAttr,
     BFloat16Type,
+    BoolAttr,
     BytesAttr,
     ComplexType,
     DenseArrayBase,
@@ -183,6 +184,16 @@ def test_IntegerAttr_normalize():
         IntegerAttr(256, 8)
 
 
+def test_IntAttr___bool__():
+    assert not IntAttr(0)
+    assert IntAttr(1)
+
+
+def test_BoolAttr___bool__():
+    assert not BoolAttr.from_bool(False)
+    assert BoolAttr.from_bool(True)
+
+
 def test_IntegerType_packing():
     # i1
     nums_i1 = (0, 1, 0, 1)

xdsl/backend/csl/print_csl.py

@@ -800,9 +800,9 @@ def print_block(self, body: Block):
                         f"  .{q_type}_queue = @get_{q_type}_queue({queue_id.value.data}),"
                     )
                     self.print(f"  .fabric_color = {fabric_color},")
-                    if wavelet_index_offset:
+                    if wavelet_index_offset is not None:
                         self.print(f"  .wavelet_index_offset = {wavelet_index_offset},")
-                    if control:
+                    if control is not None:
                         self.print(f"  .control = {control},")
                     self.print("}});")
                 case csl.SetDsdBaseAddrOp(

xdsl/dialects/builtin.py

@@ -295,6 +295,10 @@ def print_parameter(self, printer: Printer) -> None:
         with printer.in_angle_brackets():
             printer.print_string(f"{self.data}")
 
+    def __bool__(self) -> bool:
+        """Returns True if value is non-zero."""
+        return bool(self.data)
+
 
 class Signedness(Enum):
     "Signedness semantics for integer"
@@ -713,6 +717,10 @@ def constr(
             ),
         )
 
+    def __bool__(self) -> bool:
+        """Returns True if value is non-zero."""
+        return bool(self.value)
+
     @staticmethod
     def iter_unpack(
         type: _IntegerAttrTypeInvT, buffer: ReadableBuffer, /