[turbofan] Relax a too-strict dcheck.

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index 3acefdf163c029692ef2b413b34c16b3ecdc6c57..3c606c81b13d045545613d98b11fe16e69455b48 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1394,8 +1394,7 @@ class RepresentationSelector {
             node->AppendInput(jsgraph_->zone(), jsgraph_->Int32Constant(0));
             NodeProperties::ChangeOp(node, lowering->machine()->Word32Equal());
           } else {
-            DCHECK_EQ(input_info->representation(),
-                      MachineRepresentation::kTagged);
+            DCHECK(CanBeTaggedPointer(input_info->representation()));
             // BooleanNot(x: kRepTagged) => WordEqual(x, #false)
             node->AppendInput(jsgraph_->zone(), jsgraph_->FalseConstant());
             NodeProperties::ChangeOp(node, lowering->machine()->WordEqual());