Reverting back to the fallback instead of using popcnt; this instruction doesn't...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172734 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h
index b8631a569702fb44a7848f8e5ac2a9e2bf21fc21..340b7741b1bb7cce1d14d545b0df9a2f80a13f75 100644 (file)
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -303,8 +303,6 @@ inline unsigned CountTrailingOnes_64(uint64_t Value) {
 inline unsigned CountPopulation_32(uint32_t Value) {
 #if __GNUC__ >= 4
   return __builtin_popcount(Value);
-#elif defined(_MSC_VER)
-  return __popcnt(Value);
 #else
   uint32_t v = Value - ((Value >> 1) & 0x55555555);
   v = (v & 0x33333333) + ((v >> 2) & 0x33333333);