Nikita Popov 8a09875dd1 [InstSimplify] Do not remove insertvalue of undef into poison ...

We cannot remove an insertvalue of undef if it inserts into a
potentially poison value. The new implementation matches that of
insertelement.

See https://alive2.llvm.org/ce/z/pCcFsW for the previously
incorrect transform.

2022-12-08 11:35:59 +01:00

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