Add support for .2byte, .4byte and .8byte.
Fixes PR8631.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119511 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index cbd1810..38b7b27 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -947,10 +947,16 @@
       return ParseDirectiveValue(2);
     if (IDVal == ".value")
       return ParseDirectiveValue(2);
+    if (IDVal == ".2byte")
+      return ParseDirectiveValue(2);
     if (IDVal == ".long")
       return ParseDirectiveValue(4);
+    if (IDVal == ".4byte")
+      return ParseDirectiveValue(4);
     if (IDVal == ".quad")
       return ParseDirectiveValue(8);
+    if (IDVal == ".8byte")
+      return ParseDirectiveValue(8);
     if (IDVal == ".single")
       return ParseDirectiveRealValue(APFloat::IEEEsingle);
     if (IDVal == ".double")