Update bitfield declarations

Author: andykaylor

clang/lib/CIR/CodeGen/CIRGenValue.h

@@ -270,11 +270,13 @@ class AggValueSlot {
   /// This is set to true if some external code is responsible for setting up a
   /// destructor for the slot.  Otherwise the code which constructs it should
   /// push the appropriate cleanup.
-  [[maybe_unused]] bool destructedFlag : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  [[maybe_unused]] unsigned destructedFlag : 1;
 
   /// This is set to true if the memory in the slot is known to be zero before
   /// the assignment into it.  This means that zero fields don't need to be set.
-  bool zeroedFlag : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned zeroedFlag : 1;
 
   /// This is set to true if the slot might be aliased and it's not undefined
   /// behavior to access it through such an alias.  Note that it's always
@@ -287,14 +289,16 @@ class AggValueSlot {
   /// over.  Since it's invalid in general to memcpy a non-POD C++
   /// object, it's important that this flag never be set when
   /// evaluating an expression which constructs such an object.
-  [[maybe_unused]] bool aliasedFlag : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  [[maybe_unused]] unsigned aliasedFlag : 1;
 
   /// This is set to true if the tail padding of this slot might overlap
   /// another object that may have already been initialized (and whose
   /// value must be preserved by this initialization). If so, we may only
   /// store up to the dsize of the type. Otherwise we can widen stores to
   /// the size of the type.
-  [[maybe_unused]] bool overlapFlag : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  [[maybe_unused]] unsigned overlapFlag : 1;
 
 public:
   enum IsDestructed_t { IsNotDestructed, IsDestructed };