https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112552
--- Comment #4 from JuzheZhong <juzhe.zhong at rivai dot ai> --- I see. https://godbolt.org/z/cbW8535W1 The ifcvt is incorrect. iftmp.0_11 = _40 ? 0B : g; _ifc__51 = .COND_IOR (_40, d_lsm.11_10, 1, d_lsm.11_10); _40 is QImode. The later loop vectorizer vectorize _40 into vector QImode which is wrong for mask argument. The later OPTAB expand ICE. It's obvious, the correct should be: iftmp.0_11 = _40 ? 0B : g; _ifc__51 = .COND_IOR (iftmp.0_11, d_lsm.11_10, 1, d_lsm.11_10); It's odd that ARM SVE didn't generate COND_IOR in ifcvt: https://godbolt.org/z/83xcWorPa I think it's very likely caused by Robin's ifcvt patch. CCing Robin who should know the best.
