diff --git a/python/cudaq/kernel/ast_bridge.py b/python/cudaq/kernel/ast_bridge.py
index 920318b8bec..51146cc41d3 100644
--- a/python/cudaq/kernel/ast_bridge.py
+++ b/python/cudaq/kernel/ast_bridge.py
@@ -634,7 +634,7 @@ def bodyBuilder(iterVar):
                                             [iterVar], rawIndex).result
             cc.StoreOp(castedEle, targetEleAddr)
 
-        self.createInvariantForLoop(sourceSize, bodyBuilder)
+        self.createForLoop(sourceSize, bodyBuilder, invariant=True)
         return cc.StdvecInitOp(targetVecTy, targetPtr, length=sourceSize).result
 
     def __insertDbgStmt(self, value, dbgStmt):
@@ -816,15 +816,16 @@ def checkControlAndTargetTypes(self, controls, targets):
             for i, target in enumerate(targets)
         ]
 
-    def createInvariantForLoop(self,
-                               endVal,
-                               bodyBuilder,
-                               startVal=None,
-                               stepVal=None,
-                               isDecrementing=False,
-                               elseStmts=None):
+    def createForLoop(self,
+                      endVal,
+                      bodyBuilder,
+                      startVal=None,
+                      stepVal=None,
+                      isDecrementing=False,
+                      elseStmts=None,
+                      invariant=False):
         """
-        Create an invariant loop using the CC dialect. 
+        Create a loop using the CC dialect. 
         """
         startVal = self.getConstantInt(0) if startVal == None else startVal
         stepVal = self.getConstantInt(1) if stepVal == None else stepVal
@@ -868,7 +869,9 @@ def createInvariantForLoop(self,
                     cc.ContinueOp(elseBlock.arguments)
                 self.symbolTable.popScope()
 
-        loop.attributes.__setitem__('invariant', UnitAttr.get())
+        if invariant:
+            loop.attributes['invariant'] = UnitAttr.get()
+
         return
 
     def __applyQuantumOperation(self, opName, parameters, targets):
@@ -885,7 +888,7 @@ def bodyBuilder(iterVal):
 
                 veqSize = quake.VeqSizeOp(self.getIntegerType(),
                                           quantumValue).result
-                self.createInvariantForLoop(veqSize, bodyBuilder)
+                self.createForLoop(veqSize, bodyBuilder, invariant=True)
             elif quake.RefType.isinstance(quantumValue.type):
                 opCtor([], parameters, [], [quantumValue])
             else:
@@ -1719,11 +1722,12 @@ def bodyBuilder(iterVar):
                     incrementedCounter = arith.AddIOp(loadedCounter, one).result
                     cc.StoreOp(incrementedCounter, counter)
 
-                self.createInvariantForLoop(endVal,
-                                            bodyBuilder,
-                                            startVal=startVal,
-                                            stepVal=stepVal,
-                                            isDecrementing=isDecrementing)
+                self.createForLoop(endVal,
+                                   bodyBuilder,
+                                   startVal=startVal,
+                                   stepVal=stepVal,
+                                   isDecrementing=isDecrementing,
+                                   invariant=True)
 
                 self.pushValue(iterable)
                 self.pushValue(actualSize)
@@ -1820,7 +1824,7 @@ def bodyBuilder(iterVar):
                         DenseI64ArrayAttr.get([1], context=self.ctx)).result
                     cc.StoreOp(element, eleAddr)
 
-                self.createInvariantForLoop(totalSize, bodyBuilder)
+                self.createForLoop(totalSize, bodyBuilder, invariant=True)
                 self.pushValue(enumIterable)
                 self.pushValue(totalSize)
                 return
@@ -1929,7 +1933,7 @@ def bodyBuilder(iterVal):
 
                     veqSize = quake.VeqSizeOp(self.getIntegerType(),
                                               target).result
-                    self.createInvariantForLoop(veqSize, bodyBuilder)
+                    self.createForLoop(veqSize, bodyBuilder, invariant=True)
                     return
                 elif quake.RefType.isinstance(target.type):
                     opCtor([], [], [], [target], is_adj=True)
@@ -2010,7 +2014,7 @@ def bodyBuilder(iterVal):
 
                     veqSize = quake.VeqSizeOp(self.getIntegerType(),
                                               target).result
-                    self.createInvariantForLoop(veqSize, bodyBuilder)
+                    self.createForLoop(veqSize, bodyBuilder, invariant=True)
                     return
                 self.emitFatalError(
                     'reset quantum operation on incorrect type {}.'.format(
@@ -2780,7 +2784,7 @@ def bodyBuilder(iterVal):
 
                         veqSize = quake.VeqSizeOp(self.getIntegerType(),
                                                   target).result
-                        self.createInvariantForLoop(veqSize, bodyBuilder)
+                        self.createForLoop(veqSize, bodyBuilder, invariant=True)
                         return
                     elif quake.RefType.isinstance(target.type):
                         opCtor([], [], [], [target], is_adj=True)
@@ -2860,7 +2864,7 @@ def bodyBuilder(iterVal):
 
                         veqSize = quake.VeqSizeOp(self.getIntegerType(),
                                                   target).result
-                        self.createInvariantForLoop(veqSize, bodyBuilder)
+                        self.createForLoop(veqSize, bodyBuilder, invariant=True)
                         return
                     elif quake.RefType.isinstance(target.type):
                         opCtor([], [param], [], [target], is_adj=True)
@@ -2938,7 +2942,7 @@ def bodyBuilder(iterVal):
 
                         veqSize = quake.VeqSizeOp(self.getIntegerType(),
                                                   target).result
-                        self.createInvariantForLoop(veqSize, bodyBuilder)
+                        self.createForLoop(veqSize, bodyBuilder, invariant=True)
                         return
                     elif quake.RefType.isinstance(target.type):
                         opCtor([], params, [], [target], is_adj=True)
@@ -3039,14 +3043,21 @@ def visit_ListComp(self, node):
                            node.generators[0].iter)
             if quake.VeqType.isinstance(
                     self.symbolTable[node.generators[0].iter.id].type):
-                # now we know we have `[expr(r) for r in iterable]`
-                # reuse what we do in `visit_For()`
-                forNode = ast.For()
-                forNode.iter = node.generators[0].iter
-                forNode.target = node.generators[0].target
-                forNode.body = [node.elt]
-                forNode.orelse = []
-                self.visit_For(forNode)
+                iterable = self.symbolTable[node.generators[0].iter.id]
+                totalSize = quake.VeqSizeOp(self.getIntegerType(),
+                                            iterable).result
+
+                def bodyBuilder(iterVar):
+                    self.symbolTable.pushScope()
+                    q = quake.ExtractRefOp(self.getRefType(),
+                                           iterable,
+                                           -1,
+                                           index=iterVar).result
+                    self.symbolTable[node.generators[0].target.id] = q
+                    self.visit(node.elt)
+                    self.symbolTable.popScope()
+
+                self.createForLoop(totalSize, bodyBuilder, invariant=True)
                 return
 
         # General case of
@@ -3115,7 +3126,7 @@ def bodyBuilder(iterVar):
             cc.StoreOp(result, listValueAddr)
             self.symbolTable.popScope()
 
-        self.createInvariantForLoop(iterableSize, bodyBuilder)
+        self.createForLoop(iterableSize, bodyBuilder, invariant=True)
         self.pushValue(
             cc.StdvecInitOp(cc.StdvecType.get(listComputePtrTy),
                             listValue,
@@ -3462,12 +3473,12 @@ def bodyBuilder(iterVar):
                     [self.visit(b) for b in node.body]
                     self.symbolTable.popScope()
 
-                self.createInvariantForLoop(endVal,
-                                            bodyBuilder,
-                                            startVal=startVal,
-                                            stepVal=stepVal,
-                                            isDecrementing=isDecrementing,
-                                            elseStmts=node.orelse)
+                self.createForLoop(endVal,
+                                   bodyBuilder,
+                                   startVal=startVal,
+                                   stepVal=stepVal,
+                                   isDecrementing=isDecrementing,
+                                   elseStmts=node.orelse)
 
                 return
 
@@ -3536,9 +3547,9 @@ def bodyBuilder(iterVar):
                         [self.visit(b) for b in node.body]
                         self.symbolTable.popScope()
 
-                    self.createInvariantForLoop(totalSize,
-                                                bodyBuilder,
-                                                elseStmts=node.orelse)
+                    self.createForLoop(totalSize,
+                                       bodyBuilder,
+                                       elseStmts=node.orelse)
                     return
 
         self.visit(node.iter)
@@ -3656,9 +3667,7 @@ def bodyBuilder(iterVar):
             [self.visit(b) for b in node.body]
             self.symbolTable.popScope()
 
-        self.createInvariantForLoop(totalSize,
-                                    bodyBuilder,
-                                    elseStmts=node.orelse)
+        self.createForLoop(totalSize, bodyBuilder, elseStmts=node.orelse)
 
     def visit_While(self, node):
         """
@@ -3903,8 +3912,9 @@ def check_element(idx):
                 current = cc.LoadOp(accumulator).result
                 cc.StoreOp(arith.OrIOp(current, cmp_result.result), accumulator)
 
-            self.createInvariantForLoop(self.__get_vector_size(right_val),
-                                        check_element)
+            self.createForLoop(self.__get_vector_size(right_val),
+                               check_element,
+                               invariant=True)
 
             final_result = cc.LoadOp(accumulator).result
             if isinstance(op, ast.NotIn):
diff --git a/python/tests/mlir/ast_break.py b/python/tests/mlir/ast_break.py
index a0b36549864..0def54647b1 100644
--- a/python/tests/mlir/ast_break.py
+++ b/python/tests/mlir/ast_break.py
@@ -60,6 +60,6 @@ def kernel(x: float):
 # CHECK:           ^bb0(%[[VAL_21:.*]]: i64):
 # CHECK:             %[[VAL_22:.*]] = arith.addi %[[VAL_21]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_22]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_continue.py b/python/tests/mlir/ast_continue.py
index 8c1c03b5ea5..48eed4754e9 100644
--- a/python/tests/mlir/ast_continue.py
+++ b/python/tests/mlir/ast_continue.py
@@ -64,5 +64,5 @@ def kernel(x: float):
 # CHECK:           ^bb0(%[[VAL_23:.*]]: i64):
 # CHECK:             %[[VAL_24:.*]] = arith.addi %[[VAL_23]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_24]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:          }
diff --git a/python/tests/mlir/ast_decrementing_range.py b/python/tests/mlir/ast_decrementing_range.py
index fa65f383b44..4bbf47c8c6d 100644
--- a/python/tests/mlir/ast_decrementing_range.py
+++ b/python/tests/mlir/ast_decrementing_range.py
@@ -46,6 +46,6 @@ def test(q: int, p: int):
 # CHECK:           ^bb0(%[[VAL_13:.*]]: i64):
 # CHECK:             %[[VAL_14:.*]] = arith.addi %[[VAL_13]], %[[VAL_2]] : i64
 # CHECK:             cc.continue %[[VAL_14]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_elif.py b/python/tests/mlir/ast_elif.py
index ac1703820bb..f781bc6d912 100644
--- a/python/tests/mlir/ast_elif.py
+++ b/python/tests/mlir/ast_elif.py
@@ -66,7 +66,7 @@ def cost(thetas: np.ndarray):  # can pass 1D ndarray or list
 # CHECK:           ^bb0(%[[VAL_25:.*]]: i64):
 # CHECK:             %[[VAL_26:.*]] = arith.addi %[[VAL_25]], %[[VAL_5]] : i64
 # CHECK:             cc.continue %[[VAL_26]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
 
@@ -103,6 +103,6 @@ def cost(thetas: np.ndarray):  # can pass 1D ndarray or list
 # CHECK:           ^bb0(%[[VAL_21:.*]]: i64):
 # CHECK:             %[[VAL_22:.*]] = arith.addi %[[VAL_21]], %[[VAL_2]] : i64
 # CHECK:             cc.continue %[[VAL_22]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_for_stdvec.py b/python/tests/mlir/ast_for_stdvec.py
index f75a7a9887d..4efc921c92a 100644
--- a/python/tests/mlir/ast_for_stdvec.py
+++ b/python/tests/mlir/ast_for_stdvec.py
@@ -54,6 +54,6 @@ def cost(thetas: np.ndarray):  # can pass 1D ndarray or list
 # CHECK:           ^bb0(%[[VAL_17:.*]]: i64):
 # CHECK:             %[[VAL_18:.*]] = arith.addi %[[VAL_17]], %[[VAL_1]] : i64
 # CHECK:             cc.continue %[[VAL_18]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_iterate_loop_init.py b/python/tests/mlir/ast_iterate_loop_init.py
index 565f06bfa40..e488601f225 100644
--- a/python/tests/mlir/ast_iterate_loop_init.py
+++ b/python/tests/mlir/ast_iterate_loop_init.py
@@ -63,6 +63,6 @@ def kernel(x: float):
 # CHECK:           ^bb0(%[[VAL_26:.*]]: i64):
 # CHECK:             %[[VAL_27:.*]] = arith.addi %[[VAL_26]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_27]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_list_init.py b/python/tests/mlir/ast_list_init.py
index 9901d6557a6..06506a6fc69 100644
--- a/python/tests/mlir/ast_list_init.py
+++ b/python/tests/mlir/ast_list_init.py
@@ -63,6 +63,6 @@ def kernel():
 # CHECK:           ^bb0(%[[VAL_26:.*]]: i64):
 # CHECK:             %[[VAL_27:.*]] = arith.addi %[[VAL_26]], %[[VAL_0]] : i64
 # CHECK:             cc.continue %[[VAL_27]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_list_int.py b/python/tests/mlir/ast_list_int.py
index edcaa428219..c67a5d2c202 100644
--- a/python/tests/mlir/ast_list_int.py
+++ b/python/tests/mlir/ast_list_int.py
@@ -52,6 +52,6 @@ def oracle(register: cudaq.qview, auxillary_qubit: cudaq.qubit,
 # CHECK:           ^bb0(%[[VAL_16:.*]]: i64):
 # CHECK:             %[[VAL_17:.*]] = arith.addi %[[VAL_16]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_17]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/ast_qreg_slice.py b/python/tests/mlir/ast_qreg_slice.py
index f24a9152742..96b2112e8d9 100644
--- a/python/tests/mlir/ast_qreg_slice.py
+++ b/python/tests/mlir/ast_qreg_slice.py
@@ -114,7 +114,7 @@ def slice():
 # CHECK:           ^bb0(%[[VAL_43:.*]]: i64):
 # CHECK:             %[[VAL_44:.*]] = arith.addi %[[VAL_43]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_44]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           %[[VAL_45:.*]] = quake.extract_ref %[[VAL_7]][3] : (!quake.veq<4>) -> !quake.ref
 # CHECK:           quake.rz (%[[VAL_4]]) %[[VAL_45]] : (f64, !quake.ref) -> ()
 # CHECK:           return
diff --git a/python/tests/mlir/bug_1777.py b/python/tests/mlir/bug_1777.py
index fd5b2f75385..95c6838eac2 100644
--- a/python/tests/mlir/bug_1777.py
+++ b/python/tests/mlir/bug_1777.py
@@ -61,7 +61,7 @@ def test():
 # CHECK:           ^bb0(%[[VAL_18:.*]]: i64):
 # CHECK:             %[[VAL_19:.*]] = arith.addi %[[VAL_18]], %[[VAL_1]] : i64
 # CHECK:             cc.continue %[[VAL_19]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           %[[VAL_20:.*]] = cc.load %[[VAL_6]] : !cc.ptr<i1>
 # CHECK:           %[[VAL_21:.*]] = arith.cmpi eq, %[[VAL_20]], %[[VAL_3]] : i1
 # CHECK:           cc.if(%[[VAL_21]]) {
diff --git a/python/tests/mlir/ghz.py b/python/tests/mlir/ghz.py
index ac6dd80116c..ff6dc96d41a 100644
--- a/python/tests/mlir/ghz.py
+++ b/python/tests/mlir/ghz.py
@@ -48,7 +48,7 @@ def ghz(N: int):
     # CHECK:           ^bb0(%[[VAL_16:.*]]: i64):
     # CHECK:             %[[VAL_17:.*]] = arith.addi %[[VAL_16]], %[[VAL_1]] : i64
     # CHECK:             cc.continue %[[VAL_17]] : i64
-    # CHECK:           } {invariant}
+    # CHECK:           }
     # CHECK:           return
     # CHECK:         }
 
@@ -91,6 +91,6 @@ def simple(numQubits: int):
 # CHECK:           ^bb0(%[[VAL_19:.*]]: i64):
 # CHECK:             %[[VAL_20:.*]] = arith.addi %[[VAL_19]], %[[VAL_2]] : i64
 # CHECK:             cc.continue %[[VAL_20]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
diff --git a/python/tests/mlir/invalid_subrange.py b/python/tests/mlir/invalid_subrange.py
index fbf1e856e39..98305ae77e8 100644
--- a/python/tests/mlir/invalid_subrange.py
+++ b/python/tests/mlir/invalid_subrange.py
@@ -62,7 +62,7 @@ def bar():
 # CHECK:           ^bb0(%[[VAL_17:.*]]: i64):
 # CHECK:             %[[VAL_18:.*]] = arith.addi %[[VAL_17]], %[[VAL_1]] : i64
 # CHECK:             cc.continue %[[VAL_18]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }
 
diff --git a/python/tests/mlir/qft.py b/python/tests/mlir/qft.py
index 4565611d9a6..e8c83ffa990 100644
--- a/python/tests/mlir/qft.py
+++ b/python/tests/mlir/qft.py
@@ -60,7 +60,7 @@ def iqft(qubits: cudaq.qview):
 # CHECK:           ^bb0(%[[VAL_19:.*]]: i64):
 # CHECK:             %[[VAL_20:.*]] = arith.addi %[[VAL_19]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_20]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           %[[VAL_21:.*]] = cc.load %[[VAL_7]] : !cc.ptr<i64>
 # CHECK:           %[[VAL_22:.*]] = arith.subi %[[VAL_21]], %[[VAL_3]] : i64
 # CHECK:           %[[VAL_23:.*]] = cc.loop while ((%[[VAL_24:.*]] = %[[VAL_4]]) -> (i64)) {
@@ -91,13 +91,13 @@ def iqft(qubits: cudaq.qview):
 # CHECK:             ^bb0(%[[VAL_41:.*]]: i64):
 # CHECK:               %[[VAL_42:.*]] = arith.addi %[[VAL_41]], %[[VAL_2]] : i64
 # CHECK:               cc.continue %[[VAL_42]] : i64
-# CHECK:             } {invariant}
+# CHECK:             }
 # CHECK:             cc.continue %[[VAL_26]] : i64
 # CHECK:           } step {
 # CHECK:           ^bb0(%[[VAL_43:.*]]: i64):
 # CHECK:             %[[VAL_44:.*]] = arith.addi %[[VAL_43]], %[[VAL_3]] : i64
 # CHECK:             cc.continue %[[VAL_44]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           %[[VAL_45:.*]] = cc.load %[[VAL_7]] : !cc.ptr<i64>
 # CHECK:           %[[VAL_46:.*]] = arith.subi %[[VAL_45]], %[[VAL_3]] : i64
 # CHECK:           %[[VAL_47:.*]] = quake.extract_ref %[[VAL_0]]{{\[}}%[[VAL_46]]] : (!quake.veq<?>, i64) -> !quake.ref
diff --git a/python/tests/mlir/qreg_iterable.py b/python/tests/mlir/qreg_iterable.py
index 8ece9fafe23..390a9ed428a 100644
--- a/python/tests/mlir/qreg_iterable.py
+++ b/python/tests/mlir/qreg_iterable.py
@@ -43,6 +43,6 @@ def foo(N: int):
 # CHECK:           ^bb0(%[[VAL_12:.*]]: i64):
 # CHECK:             %[[VAL_13:.*]] = arith.addi %[[VAL_12]], %[[VAL_1]] : i64
 # CHECK:             cc.continue %[[VAL_13]] : i64
-# CHECK:           } {invariant}
+# CHECK:           }
 # CHECK:           return
 # CHECK:         }