llvm-project

474a9587 - [InstSimplify] Only fold gep of a pointer difference when the division is exact (#237685)

[InstSimplify] Only fold gep of a pointer difference when the division is exact (#237685) The `ashr` and `sdiv` folds in simplifyGEPInst (`gep V, (ashr (sub P, V), C) -> P` and its `sdiv` form) are only correct if the divisions are exact. Fixes #234269. Assisted-by: Claude Opus 5.5