[Bug rtl-optimization/57676] New: ICE: Maximum number of LRA constraint passes is achieved (30)

[antoine.balestrat at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57676

            Bug ID: 57676
           Summary: ICE: Maximum number of LRA constraint passes is
                    achieved (30)
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: antoine.balestrat at gmail dot com

Using GCC 4.9.0 as of 20130622 :

$ cat lra.c
int a, b, c;

void f(p1)
{
    for(;;)
    {
        if(p1 ? : (c /= 0))
        {
            int d;

            for(; d; d++)
            {
                for(b = 0; b < 4; b++)
                    p1 /= p1;
lbl:
                while(a);
            }
        }

        if((c &= 1))
            goto lbl;
    }
}

$ xgcc -w -O2 -funroll-loops lra.c
lra.c: In function ‘f’:
lra.c:23:1: internal compiler error: Maximum number of LRA constraint passes is
achieved (30)

 }
 ^
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See <http://gcc.gnu.org/bugs.html> for instructions.