aqjune added a comment. In D103874#3611483 <https://reviews.llvm.org/D103874#3611483>, @nikic wrote:
> Which intrinsic are you working on here? If this is about the mm_undefined > intrinsics, why do we need to change those from the current status quo of > using a zero value instead of undef? It is about the `mm256_castpd128_pd256` intrinsic and its friends (clang/test/CodeGen/X86/avx-builtins.c, line 146). It was previously using `shufflevector` with undef masks - since the results are poison, an alternative pattern as below is necessary to represent the intrinsic: %a1 = freeze <2 x double> poison %res = shufflevector <2 x double> %a0, <2 x double> %a1, <4 x i32> <i32 0, i32 1, i32 2, i32 3> Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D103874/new/ https://reviews.llvm.org/D103874 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
