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* [Bug tree-optimization/112386] New: `CMP0 && CMP1 && CMP2` is better optimized than `CMP0  & CMP1 & CMP2`
@ 2023-11-05  1:01 pinskia at gcc dot gnu.org
  0 siblings, 0 replies; only message in thread
From: pinskia at gcc dot gnu.org @ 2023-11-05  1:01 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112386

            Bug ID: 112386
           Summary: `CMP0 && CMP1 && CMP2` is better optimized than `CMP0
                    & CMP1 & CMP2`
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Take:
```
_Bool foo(int x, int y, int z) {
    return (z >= 0) & (x >= y + z) & (x >= y);
}
_Bool foo1(int x, int y, int z) {
    return (z >= 0) && (x >= y + z) && (x >= y);
}
```

In foo1, we can optimize away the `x >= y` in VRP but foo is not optimized
away.

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2023-11-05  1:01 [Bug tree-optimization/112386] New: `CMP0 && CMP1 && CMP2` is better optimized than `CMP0 & CMP1 & CMP2` pinskia at gcc dot gnu.org

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