[LLVMbugs] [Bug 22447] New: Bogus warning "is not needed and will not be emitted"

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22447

            Bug ID: 22447
           Summary: Bogus warning "is not needed and will not be emitted"
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: rafael.espindola at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Given

namespace {
struct foo {
  foo(int = bar) {}
  static int bar;
};
int foo::bar;
}
foo x;

clang warns: "variable 'bar' is not needed and will not be emitted"

but @_ZN12_GLOBAL__N_13foo3barE is emitted. Commenting the "int foo::bar"" also
produces the warning:

variable '(anonymous namespace)::foo::bar' has internal linkage but is not
defined

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