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From: "zhendong.su at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/97836] wrong code at -O1 on x86_64-pc-linux-gnu
Date: Sun, 15 Nov 2020 12:53:03 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97836

--- Comment #1 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
Another related test that triggers the miscompilation at -Os, but not -O1:=
=20

[621] % gcctk -O1 small.c; ./a.out
[622] %=20
[622] % gcctk -Os small.c; ./a.out
Aborted
[623] %=20
[623] % cat small.c
int a;

int b(int c) { return 0; }

static int *d(int *e) {
  if (a) {
    a =3D a && b(*e);
  }
  return e;
}

int main() {
  int f;
  if (d(&f) !=3D &f)
    __builtin_abort();
  return 0;
}=