Rewrite offsetof with __builtin_offsetof with -fms-kernel#117
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Patch rewrites portion of AST if it is detected as offset calculation, e.g (size_t)&(((MyStruct*)0)->field). This expression is being rewritten by this patch as (size_t)__builtin_offsetof(MyStruct, field). Patch may affect compiler warnings, see test cases for details.
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Patch rewrites portion of AST if it is detected as offset calculation, e.g (size_t)&(((MyStruct*)0)->field). This expression is being rewritten by this patch as (size_t)__builtin_offsetof(MyStruct, field). Patch may affect compiler warnings, see test cases for details.