[llvm-bugs] [Bug 47298] New: Failure to optimize strlen of string with known length

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47298

            Bug ID: 47298
           Summary: Failure to optimize strlen of string with known length
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Support Libraries
          Assignee: unassignedbugs at nondot.org
          Reporter: gabravier at gmail.com
                CC: llvm-bugs at lists.llvm.org

bool f()
{
    char a[4];
    strcpy(a, "123");
    return strlen(a) == 3;
}

This can be optimized to `return true;`. This transformation is done by GCC,
but not by LLVM.

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