[Bug tree-optimization/116610] New: wrong-code with SLP induction vectorization when using partial vectors and alignment peeling via masking

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116610

            Bug ID: 116610
           Summary: wrong-code with SLP induction vectorization when using
                    partial vectors and alignment peeling via masking
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

gcc.target/aarch64/sve/peel_ind_1.c when forcing single-lane SLP vectorizes
using VNx4SI and

peel_ind_1.c:16:34: note:  misalignment for fully-masked loop: 1

but the initial value for the induction isn't adjusted:

  # vect_vec_iv_.5_2 = PHI <_11(5), { 5, 10, 15, 20, 25, 30, 35, 40 }(2)>