[clang] [llvm] [InstCombine] Strip leading zero indices from GEP (PR #155415)

[Nikita Popov via cfe-commits]

nikic wrote:

GVN doesn't seem to do anything particularly interesting there. I tried running this through llc to see how the codegen changes, but that gives:

> LLVM ERROR: Cannot select: intrinsic %llvm.amdgcn.if

Does this need extra llc flags beyond the triple?

https://github.com/llvm/llvm-project/pull/155415