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From: "19373742 at buaa dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/111734] wrong code with '-O3
 -fno-inline-functions-called-once -fno-inline-small-functions
 -fno-omit-frame-pointer -fno-toplevel-reorder -fno-tree-fre'
Date: Mon, 09 Oct 2023 12:42:31 +0000
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X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: needs-reduction, wrong-code
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X-Bugzilla-Who: 19373742 at buaa dot edu.cn
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Message-ID: <bug-111734-4-xzx8iDwRGW@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111734

--- Comment #2 from CTC <19373742 at buaa dot edu.cn> ---
A reduced testcase:

#include<stdio.h>
#include<inttypes.h>
struct a {};
struct {
  uint32_t b;
  int16_t c;
} d, f =3D {9, 1};
int32_t e;
static int32_t *g();
static uint32_t h() {
  int32_t *i =3D &e;
  struct a j;
  g(j, i, &i);
  if (*i)
    f =3D d;
}
int32_t *g(uint32_t, int32_t, int32_t **m) {
  int32_t *k =3D &e;
  *m =3D k;
}
int main() {
  h();
  printf("%d\n", f.c);
}=