[Bug tree-optimization/108353] [13 Regression] Dead Code Elimination Regression at -O2 since r13-3898-gaf96500eea72c6

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108353

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> The for (; j; j = j + 9) loop invokes undefined behavior:
> 
> t.c: In function 'g':
> t.c:11:17: warning: iteration 396462472 invokes undefined behavior
> [-Waggressive-loop-optimizations]
>    11 |     for (; j; j = j + 9) {
>       |               ~~^~~~~~~
> t.c:11:12: note: within this loop
>    11 |     for (; j; j = j + 9) {
>       |            ^

Here is the testcase without the overflow behavior and also a full link
testcase:

#include <limits.h>
enum { a } b();
int d;
int e;
int f;
void foo();
[[gnu::noipa]]
void bar49_(void){}
[[gnu::noipa]]
void(c)(void){}
static short g(int h, int i) {
  int j = 2874288693, k = 1;
  if (h)
    for (; j < INT_MAX-18; j = j + 9) {
      f = 0;
      for (; f <= 1; c())
        k = 90;
    }
  i = k;
  for (; e; ++e) {
    if (i)
      continue;
    foo();
    i = b();
  }
  return 4;
}
int l() {
  bar49_();
  return 1;
}
int main() { d = d || g(d, l()); }