[llvm-commits] [PATCH] fix PR12359

[Michael Liao]

Hi

Please review the attached from Sriram fixing PR12359. As PSHUFB will zero elements of negative indices, v16i8 shuffle vector is optimized with extra checking whether V2 is zero and treat that similar to undefined V2 to save one PSHUFB and POR.

Let me whether it's OK to commit.

Yours
- Michael


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