[llvm-bugs] [Bug 39365] New: gnu address-of-label extension parsing has too-high precedence

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39365

            Bug ID: 39365
           Summary: gnu address-of-label extension parsing has too-high
                    precedence
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: zturner at google.com
                CC: llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

5 - https://godbolt.org/z/_XH9G1

struct foo
{
unsigned short operator!=(const foo &)
{
    return 1;
}
};

extern void* p1;
extern void* p2;
extern foo f;

void bar()
{
    if (f != (foo()) && p1 == p2)
    {

    }
}

Removing the parentheses or removing the second conditional makes this work. 
Since this doesn't make sense as an address-of-label, we should prioritize
parsing this as what it actually is, which is ((f != foo()) && (p1 == p2))

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