Jenkins asan+ubsan build failure / X86TargetLowering::LowerBUILD_VECTOR

[Kaelyn Takata via llvm-commits]

I'm encountering the same error in test/CodeGen/X86/avg.ll when running
with asan enabled, due to a bit shift of 33 with a 32-bit integer.

On Tue, Nov 24, 2015 at 10:56 AM, Matthias Braun via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> Hi,
>
> the greendragon asan+ubsan build started failing:
>
> http://lab.llvm.org:8080/green/job/clang-stage2-cmake-RgSan_check/782/
>
> I believe this was triggered by r253952 "[X86][SSE] Detect AVG pattern
> during instruction combine for SSE2/AVX2/AVX512BW."
>
> Looking at the failure this seems to be an cause by an existing bug in
> X86TargetLowering::LowerBUILD_VECTOR() which uses an unsigned variable as a
> bitset with a bit for each vector element. The test added contains some "64
> x XXX" vector types and overflows this.
>
> - Matthias
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20151124/6a7210f6/attachment.html>