[LLVMbugs] [Bug 18263] New: Empty structs have 4-byte size in "-cxx-abi microsoft" mode

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18263

            Bug ID: 18263
           Summary: Empty structs have 4-byte size in "-cxx-abi microsoft"
                    mode
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hans at chromium.org
                CC: llvmbugs at cs.uiuc.edu, whunt at google.com
    Classification: Unclassified

Empty structs have 4-byte size in "-cxx-abi microsoft" mode, see the
test/Sema/empty1.c test.

But the standard says they should be 0 bytes. MSVC rejects empty structs in C
mode, so I'm not sure entirely what layout it would give them.

And it's weird that -cxx-abi affects these sizes because we're not in C++ mode.

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