[Bug middle-end/38572] [4.4 Regression] ICE in set_value_range, at tree-vrp.c:398

[pinskia at gcc dot gnu dot org]

------- Comment #11 from pinskia at gcc dot gnu dot org  2008-12-18 23:20 
-------
Reduced testcase:
enum JSOp {
  JSOP_GETELEM = 5,
  JSOP_LIMIT
}  ;
typedef struct JSFrameRegs {
  unsigned char *pc;
} JSFrameRegs;
struct JSStackFrame {
  JSFrameRegs *regs;
};
int
f( unsigned char *pc,   enum JSOp nextop )
{
  unsigned char *startpc, *endpc, *pc2, *done;
  enum JSOp op, lastop, saveop;
  while ( pc < endpc    )
  {
    JSStackFrame *fp;
    unsigned format, mode, type;
    if ( ( fp &&  fp->regs &&  pc == fp->regs->pc ) || pc == startpc )
    {
      if (mode == (2U<<5))
        op = (JSOp) ((format & (1U<<8)) ? 256 : 1);
      else
        if (mode == (3U<<5))
          op = (JSOp) ((format & (1U<<8)) ? 257 : 2);
      else
        op = JSOP_GETELEM;
    }
    if (op >= JSOP_LIMIT) {
      if (((format) & 0x001f) != 8)
        return 0;
    }
  }
}


-- CUT ---
This is related to enums as if I change the type of op to int, GCC does not
crash.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2008-12-18 23:20:57
               date|                            |
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38572