[Bug tree-optimization/83288] New: [8 Regression] polyhedron gas_dyn 2-fold compile-time regression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83288

            Bug ID: 83288
           Summary: [8 Regression] polyhedron gas_dyn 2-fold compile-time
                    regression
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Keywords: compile-time-hog, needs-bisection
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

https://gcc.opensuse.org/gcc-old/c++bench-czerny/pb11/pb11-summary.txt-1-0.html
shows a two-fold compile-time regression of gas_dyn.  Log files indicate
this happened between r255080 (good, 1s) and r255143 (bad, 1.8s).  On another
machine good is r255085 (4s) and bad r255144 (8s).