[Bug optimization/11536] [3.3/3.4 Regression] [strength-reduce] -O2 optimalization produces wrong code

[pinskia at physics dot uc dot edu]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11536



------- Additional Comments From pinskia at physics dot uc dot edu  2003-07-16 02:34 -------
Here is a testcase suited for the testsuite:
void f(char*,int,int) __attribute__((__noinline__));

void f(char *t,int i,int j){if(t[0]=='C')abort();}

int main()
{
  int i;
  int first= 0;
  int last= 0;

  while (last<3) {
    last = first;
    while(first<=last) {
      first++;
      for (i=0;i<3;i++){
        last++;
        f("A",first,last);
      }
      if (last>10) return 0;
      f("B",first,last);
    }
    f("C",first,last);
  }
  return 0;
}