[Bug c/8268] no compile time array index checking

[trt at acm dot org]

------- Additional Comments From trt at acm dot org  2005-06-21 15:55 -------
Since there is mudflap, it is especially important to avoid false positives.

One type occurs in code that never actually executes, e.g. conditional lookup:
   #define LOOKUP(i) (i < XSIZE ? x[i]: 0)
To defend against that, issue the warning only if skip_evaluation is zero.
(For a more general fix, see http://gcc.gnu.org/ml/gcc/2004-10/msg00859.html) 

Another is taking the address one past the last element, e.g.
    int a[10];
    int *aend = &a[10];  // this is perfectly valid, and common

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8268