Data directives such as .word, .half, .hword are currently parsed using
HexagonAsmParser::ParseDirectiveValue which effectively duplicates logic from
AsmParser::parseDirectiveValue. This patch deletes that duplicated logic in
favour of using addAliasForDirective.
Differential Revision: https://reviews.llvm.org/D46999
llvm-svn: 332607
Alex Bradbury