https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69297
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- With a fix: t.c:76:10: note: Cost model analysis: Vector inside of basic block cost: 376 Vector prologue cost: 0 Vector epilogue cost: 0 Scalar cost of basic block: 96 t.c:76:10: note: not vectorized: vectorization is not profitable. Note the reduction loop is still vectorized: t.c:74:5: note: Cost model analysis: Vector inside of loop cost: 3 Vector prologue cost: 1 Vector epilogue cost: 7 Scalar iteration cost: 3 Scalar outside cost: 0 Vector outside cost: 8 prologue iterations: 0 epilogue iterations: 0 Calculated minimum iters for profitability: 4 but likely this isn't profitable either?
