================
@@ -2294,6 +2294,18 @@ llvm::Value *CodeGenFunction::EmitDynamicCast(Address
ThisAddr,
DestRecordTy->getAsCXXRecordDecl()->isEffectivelyFinal() &&
CGM.getCXXABI().shouldEmitExactDynamicCast(DestRecordTy);
+ std::optional<CGCXXABI::ExactDynamicCastInfo> ExactCastInfo;
+ if (IsExact) {
+ ExactCastInfo = CGM.getCXXABI().getExactDynamicCastInfo(SrcRecordTy,
DestTy,
+ DestRecordTy);
+ if (!ExactCastInfo) {
+ llvm::Value *NullValue = EmitDynamicCastToNull(*this, DestTy);
+ if (!Builder.GetInsertBlock())
+ EmitBlock(createBasicBlock("dynamic_cast.always_fails"));
----------------
efriedma-quic wrote:
Maybe name this dynamic_cast.unreachable, since anything in the basic block is
unreachable.
https://github.com/llvm/llvm-project/pull/152076
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