+ /// An enumeration for the supported behaviors of module flags. The following
+ /// module flags behavior values are supported:
+ ///
+ /// Value Behavior
+ /// ----- --------
+ /// 1 Error
+ /// Emits an error if two values disagree.
+ ///
+ /// 2 Warning
+ /// Emits a warning if two values disagree.
+ ///
+ /// 3 Require
+ /// Emits an error when the specified value is not present
+ /// or doesn't have the specified value. It is an error for
+ /// two (or more) llvm.module.flags with the same ID to have
+ /// the Require behavior but different values. There may be
+ /// multiple Require flags per ID.
+ ///
+ /// 4 Override
+ /// Uses the specified value if the two values disagree. It
+ /// is an error for two (or more) llvm.module.flags with the
+ /// same ID to have the Override behavior but different
+ /// values.
+ enum ModFlagBehavior { Error = 1, Warning = 2, Require = 3, Override = 4 };
+
+ struct ModuleFlagEntry {
+ ModFlagBehavior Behavior;
+ MDString *Key;
+ Value *Val;
+ ModuleFlagEntry(ModFlagBehavior B, MDString *K, Value *V)
+ : Behavior(B), Key(K), Val(V) {}
+ };
+