[llvm-bugs] [Bug 46197] New: Failure to optimize out atoi when used as operand of _tzcnt_u64

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46197

            Bug ID: 46197
           Summary: Failure to optimize out atoi when used as operand of
                    _tzcnt_u64
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: gabravier at gmail.com
                CC: craig.topper at gmail.com, llvm-bugs at lists.llvm.org,
                    llvm-dev at redking.me.uk, spatel+llvm at rotateright.com

#include <x86intrin.h>

void f(char *s)
{
    _tzcnt_u64(atol(s));
}

This can be optimized to doing nothing.

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