As discussed by Andrea on PR30486, we have an unsafe cast to an Instruction type in the select combine which doesn't take into account that it could be a ConstantExpr instead.
Differential Revision: https://reviews.llvm.org/D25466
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284000 91177308-0d34-0410-b5e6-96231b3b80d8
Simon Pilgrim