diff options
Diffstat (limited to 'include/llvm/IR/OperandTraits.h')
| -rw-r--r-- | include/llvm/IR/OperandTraits.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/llvm/IR/OperandTraits.h b/include/llvm/IR/OperandTraits.h index e97a8009ccc0..7b94283856b6 100644 --- a/include/llvm/IR/OperandTraits.h +++ b/include/llvm/IR/OperandTraits.h @@ -30,6 +30,9 @@ namespace llvm { template <typename SubClass, unsigned ARITY> struct FixedNumOperandTraits { static Use *op_begin(SubClass* U) { + static_assert( + !std::is_polymorphic<SubClass>::value, + "adding virtual methods to subclasses of User breaks use lists"); return reinterpret_cast<Use*>(U) - ARITY; } static Use *op_end(SubClass* U) { @@ -65,6 +68,9 @@ struct OptionalOperandTraits : public FixedNumOperandTraits<SubClass, ARITY> { template <typename SubClass, unsigned MINARITY = 0> struct VariadicOperandTraits { static Use *op_begin(SubClass* U) { + static_assert( + !std::is_polymorphic<SubClass>::value, + "adding virtual methods to subclasses of User breaks use lists"); return reinterpret_cast<Use*>(U) - static_cast<User*>(U)->getNumOperands(); } static Use *op_end(SubClass* U) { |