[LLVMbugs] [Bug 14772] New: _Atomic types are not literal

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Jan 1 13:31:30 PST 2013


             Bug #: 14772
           Summary: _Atomic types are not literal
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: erik.olofsson at hansoft.se
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

This silently breaks std::atomic initialized with ATOMIC_VAR_INIT which is
initialized dynamically instead of statically.

Related to: http://llvm.org/bugs/show_bug.cgi?id=11612

struct AtomicInt
  _Atomic(int) Atomic;
AtomicInt GlobalAtomic0 = {0};
constexpr AtomicInt GlobalAtomic1 = {0};

clang -fsyntax-only -std=c++11 testatomic.cpp
testatomic.cpp:6:21: error: constexpr variable cannot have non-literal type
'const AtomicInt'
constexpr AtomicInt GlobalAtomic1 = {0};
testatomic.cpp:3:16: note: 'AtomicInt' is not literal because it has data
member 'Atomic' of non-literal type '_Atomic(int)'
  _Atomic(int) Atomic;
1 error generated.

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