aqjune added a comment. In D104790#2842523 <https://reviews.llvm.org/D104790#2842523>, @nikic wrote:
> Is this actually better in any meaningful way? InstCombine will turn `freeze > poison` into `zeroinitializer`, and until then this is just a completely > opaque value. I think to correctly emit IR for intrinsics like mm256_castsi128_si256 (D103874 <https://reviews.llvm.org/D103874> has more context) efficient handling of this kind of pattern is necessary: %v = freeze <n x ty> poison %w = shufflevector %a, %v, mask The zeroinitializer folding is done by InstCombine's visitFreeze, which should be fixed maybe. I'll play with some patterns and create patches for this. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D104790/new/ https://reviews.llvm.org/D104790 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
