[llvm] [InstSimplify] Fold `getelementptr inbounds null, idx -> null` (PR #130742)

[Madhur Amilkanthwar via llvm-commits]

madhur13490 wrote:

This has caused failure of the xalancbmk_v6 benchmark within SPEC 2017 in our CI. Passing -fwrapv-pointer makes the test pass. 

@dtcxzyw Can you please announce it more widely, as it's a breaking change. Discourse is a good way to communicate such changes than letting people figure out the hard way.

xalanc is a known case to us at this point, but I am sure many downstream compilers may have vendor-specific tests that may start failing sooner or later. Wider announcement would help them.



https://github.com/llvm/llvm-project/pull/130742