[llvm] [InstCombine] Generalize zext(add X, -C) + C folding (PR #191723)

via llvm-commits llvm-commits at lists.llvm.org
Sun Apr 12 23:32:34 PDT 2026

Previous message: [llvm] [InstCombine] Generalize zext(add X, -C) + C folding (PR #191723)
Next message: [llvm] [SLP]Fix dominance failure when value is copyable in one PHI entry but non-copyable in another (PR #191724)
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Maiowaa wrote:

Updated in v3:

Fixed type width mismatch bug: truncate outer C to inner bitwidth before comparison
Removed separate C==1 block, now handled uniformly by the general case
Added negative tests: C=260 overflow case and mismatched C/inner-C case

https://github.com/llvm/llvm-project/pull/191723

Previous message: [llvm] [InstCombine] Generalize zext(add X, -C) + C folding (PR #191723)
Next message: [llvm] [SLP]Fix dominance failure when value is copyable in one PHI entry but non-copyable in another (PR #191724)
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

More information about the llvm-commits mailing list