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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/112752] `~a - MIN<MIN<~a, ~b>, ~c>` is not optimized to `MAX<MAX<a,b>,c> - a`
Date: Tue, 28 Nov 2023 23:01:02 +0000	[thread overview]
Message-ID: <bug-112752-4-fkPGgMLnPT@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-112752-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112752

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a semi-reduced testcase:
```
#define byte unsigned char
#define MIN(a, b) ((a) > (b)?(b):(a))

byte hh(byte r, byte g, byte b) {
  byte c = 255 - r;
  byte m = 255 - g;
  byte y = 255 - b;
  byte tmp = MIN(m, y);
  byte k = MIN(c, tmp);
  return m - k;
}
```
Note matching this directly, the above might not fix the original testcase.

      parent reply	other threads:[~2023-11-28 23:01 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-28 22:32 [Bug tree-optimization/112752] New: " pinskia at gcc dot gnu.org
2023-11-28 22:32 ` [Bug tree-optimization/112752] " pinskia at gcc dot gnu.org
2023-11-28 23:01 ` pinskia at gcc dot gnu.org [this message]

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