[Bug tree-optimization/79621] New: [7 Regression] ICE in operator[], at vec.h:732

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79621

            Bug ID: 79621
           Summary: [7 Regression] ICE in operator[], at vec.h:732
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

At least gcc-7.0.0-alpha20170212 and gcc-7.0.0-alpha20170219 snapshots ICE when
compiling the following snippet w/ -O2:

int b5;

void
h6 (int zb, int e7)
{
  while (b5 > 0)
    {
      int gv;

      for (gv = 1; gv < 4; ++gv)
        {
          ((zb != 0) ? b5 : gv) && (b5 /= e7);
          zb = 0;
        }
      e7 = 0;
    }
}

% gcc-7.0.0-alpha20170219 -O2 -c glm1ku95.c 
glm1ku95.c: In function 'h6':
glm1ku95.c:4:1: internal compiler error: in operator[], at vec.h:732
 h6 (int zb, int e7)
 ^~