[turbofan] Fix deoptimization of boolean bit constants.

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 a2b67db13bf04862ca2daaa571b233d395f8996b..a1cd46749617c0e148fedd9e979c72b6048e6bd1 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1030,6 +1030,8 @@ class RepresentationSelector {
                      MachineRepresentation::kWord32 ||
                  machine_type.semantic() == MachineSemantic::kInt32 ||
                  machine_type.semantic() == MachineSemantic::kUint32);
+          DCHECK(machine_type.representation() != MachineRepresentation::kBit ||
+                 input_type->Is(Type::Boolean()));
           (*types)[i] = machine_type;
         }
       }