[InstCombine] remove fold of an icmp pattern that should never happen
While removing a scalar shackle from an icmp fold, I noticed that I couldn't find any tests to trigger
this code path.
The 'and' shrinking transform should be handled by InstCombiner::foldCastedBitwiseLogic()
or eliminated with InstSimplify. The icmp narrowing is part of InstCombiner::foldICmpWithCastAndCast().
Differential Revision: https://reviews.llvm.org/D24031
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280370
91177308-0d34-0410-b5e6-
96231b3b80d8
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