https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54346
--- Comment #7 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to Marc Glisse from comment #6) > The log says that this breaks tree-ssa/forwprop-19.c, but I don't see any > xfail or anything. Does it only fail because gimple-simplify leaves some > dead code around, so you could update the test to scan the next DCE pass > dump instead of forwprop1? Or are we missing a transformation that just > detects a VEC_PERM_EXPR with an identity permutation? Uoops, I didn't notice this, will add an incremental patch to handle the indentical index (forwporp-19.c) scenario， sorry.
