[llvm-bugs] [Bug 47091] New: Failure to properly optimize successive > 0 identities to unsigned comparisons

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47091

            Bug ID: 47091
           Summary: Failure to properly optimize successive > 0 identities
                    to unsigned comparisons
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: gabravier at gmail.com
                CC: llvm-bugs at lists.llvm.org

void bar(int, int);

void foo(int a, int b)
{
    if (a >= 0 && b >= 0 && a < 32 && b < 128)
        bar(a, b);
}

The if's condition can be optimized to `(unsigned)a < 32 && (unsigned)b < 128`.
This transformation is done by GCC, but not by LLVM.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20200810/6693e089/attachment.html>