[PATCH] D87502: [DAGCombiner] Use known bits to fold extract_vector_elt with const index

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

In D87502#2267572 <https://reviews.llvm.org/D87502#2267572>, @foad wrote:

> 2. it provokes a crash on `test/CodeGen/AMDGPU/global-extload-i16.ll` which I haven't been able to fix yet

https://bugs.llvm.org/show_bug.cgi?id=47492


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