[SystemZ] Add support for the .word directive.

Summary: Branch off the work to add support for the .word directive,
using addAliasForDirective.

Reviewers: koriakin

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D22142

llvm-svn: 274878
diff --git a/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp b/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
index a894bea..3923614 100644
--- a/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
+++ b/llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
@@ -391,6 +391,9 @@
     : MCTargetAsmParser(Options, sti), Parser(parser) {
     MCAsmParserExtension::Initialize(Parser);
 
+    // Alias the .word directive to .short.
+    parser.addAliasForDirective(".word", ".short");
+
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits()));
   }