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08f3b7b05f
Looking at r225438 inspired me to see how the PowerPC backend handled the situation (calling a bitcasted TLS global), and it turns out we also produced an error (cannot select ...). What it means to "call" something that is not a function is implementation and platform specific, but in the name of doing something (besides crashing), this makes sure we do what GCC does (treat all such calls as calls through a function pointer -- meaning that the pointer is assumed, as is the convention on PPC, to point to a function descriptor structure holding the actual code address along with the function's TOC pointer and environment pointer). As GCC does, we now do the same for calling regular (non-TLS) non-function globals too. I'm not sure whether this is the most useful way to define the behavior, but at least we won't be alone. llvm-svn: 225617 |
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