[Bug tree-optimization/90637] New: [10 Regression] ICE in vect_loop_versioning, at tree-vect-loop-manip.c:3055

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90637

            Bug ID: 90637
           Summary: [10 Regression] ICE in vect_loop_versioning, at
                    tree-vect-loop-manip.c:3055
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, openmp
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

gcc-10.0.0-alpha20190519 snapshot (r271384) ICEs when compiling the following
testcase at any optimization level (except -Og) and w/ -fopenmp --param
sink-frequency-threshold=90:

int vf;

void
pc (void)
{
  int xr, b7;

#pragma omp for simd if (xr) lastprivate (vf) schedule (static, 1)
  for (b7 = 0; b7 < 1; ++b7)
    {
    }
}

% gcc-10.0.0-alpha20190519 -O1 -fopenmp --param sink-frequency-threshold=90 -c
wascdsp5.c
during GIMPLE pass: vect
wascdsp5.c: In function 'pc':
wascdsp5.c:4:1: internal compiler error: in vect_loop_versioning, at
tree-vect-loop-manip.c:3055
    4 | pc (void)
      | ^~

(sorry, no full backtrace this time)