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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/113189] `(-X * Y) * -X` can be optimized to
 `(X * Y) * X`
Date: Mon, 01 Jan 2024 09:43:10 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization, TREE
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113189

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Other examples where the negative can be removed:
```
int foo(int a) {
    return -a * (-a * a);
}

int bar(int a) {
    return (-a * -a) * a;
}
int foo1(int a, int b, int c) {
    return -a * (-b * c);
}
```

bar is handled at the gimple level but foo and foo1 are not.=