The addcarry and subborrow variants of the builtins do not require the adx
target attribute; only the addcarryx variants require them.
Differential Revision: http://reviews.llvm.org/D18533
llvm-svn: 264801
They are added to adxintrin.h but outside __ADX__ block.
These intrinics generates adc and sbb correspondingly that were available before ADX
llvm-svn: 218118