search for: sequence_point

....  This is the semantics of C.  Short-circuiting is used to > defend against all sorts of undefined behavior in real code. More precisely, && and || are sequence points (though in C++ they may not be sequence points if respective operator is overloaded) [1] http://en.wikipedia.org/wiki/Sequence_point -- Regards, Konstantin

Is there any way to disable short-circuit evaluation of expressions in Clang/LLVM? Let's say I have C code like the following: bool validX = get_group_id(0) > 32; int globalIndexY0 = get_group_id(1)*186 + 6*get_local_id(1) + 0 + 1; bool valid0 = validX && globalIndexY0 >= 4 && globalIndexY0 < 3910; int globalIndexY1 = get_group_id(1)*186 + 6*get_local_id(1) +

Justin Holewinski <justin.holewinski at gmail.com> writes: > int globalIndexY2 = get_group_id(1)*186 + 6*get_local_id(1) + 2 + 1; > bool valid2       = validX && globalIndexY2 >= 4 && globalIndexY2 < 3910; > > Clang, even at -O0, is performing short-circuit evaluation of these > expressions, resulting in a fair number of branch instructions being >