llvm

72b85b62 - [InstCombine]PtrReplacer: Correctly handle select with unavailable operands (#148829) (#19908)

[InstCombine]PtrReplacer: Correctly handle select with unavailable operands (#148829) (#19908) The testcase I added previously failed because a SelectInst with invalid operands was created (one side `addrspace(4)`, the other `addrspace(5)`). PointerReplacer needs to dig deeper if the true and/or false instructions of the select are not available. Fixes SWDEV-542957 (cherry picked from commit f223411e2e005ecd54523801db603b54d69f3159) Co-authored-by: Pierre van Houtryve <pierre.vanhoutryve@amd.com>