[llvm-commits] Buggy SelectionDAG binop vector widening
dalej at apple.com
Thu Jun 3 11:12:59 PDT 2010
On Jun 3, 2010, at 6:27 AMPDT, Visa Putkinen wrote:
> The function responsible for widening vector binary operation nodes in
> SelectionDAGs (DAGTypeLegalizer::WidenVecRes_Binary in
> lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp, r105388) returns
> incorrect results for many vector lengths and even triggers asserts on
> lengths 9 and 13. I didn't find a bug report about this bug.
> + NextVT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT,
> + } while (!TLI.isTypeLegal(NextVT));
This should be isTypeSynthesizable, not isTypeLegal. There are
probably other places in here where that's also true.
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