[Bug tree-optimization/97630] New: [11 Regression] SLP vectorizer leaks memory

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97630

            Bug ID: 97630
           Summary: [11 Regression] SLP vectorizer leaks memory
           Product: gcc
           Version: 11.0
            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: ---

We currently leak all memory pointed to from SLP cycles (not the SLP nodes
themselves, but the scalar_stmts array and similar).  This is because we
manage memory by reference counting but that breaks down with cycles.

One example is gcc.dg/vect/bb-slp-57.c