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35d3e774ed
simply does the atomic.cmp.swap on the larger type, which means it blows away whatever is sitting in the bytes just after the memory location, i.e. causes a buffer overflow. This really requires target specific code, which is why LegalizeTypes doesn't try to handle this case generically. The existing (wrong) code in LegalizeDAG will go away automatically once the type legalization code is removed from LegalizeDAG so I'm leaving it there for the moment. Meanwhile, don't test for this feature. llvm-svn: 53669
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