craig.topper added inline comments.
================ Comment at: include/bit:140 static_assert(sizeof(unsigned) == 4, ""); return __popcnt(__x); } ---------------- MSVC blindly uses the popcnt instruction whenever it sees this intrinsic. So this only works on Nehalem and newer Intel CPUs. And Barcelona and newer AMD CPUs. This is why llvm uses a bit math version of popcnt for MSVC in include/llvm/Support/MathExtras.h ================ Comment at: include/bit:150 static_assert(sizeof(unsigned long long) == 8, ""); return __popcnt64(__x); } ---------------- This doesn't exist in 32-bit MSVC. https://reviews.llvm.org/D50876 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
