Jakob Stoklund Olesen 83c1b42b62 Allow TableGen DAG arguments to be just a name. ... DAG arguments can optionally be named: (dag node, node:$name) With this change, the node is also optional: (dag node, node:$name, $name) The missing node is treated as an UnsetInit, so the above is equivalent to: (dag node, node:$name, ?:$name) This syntax is useful in output patterns where we currently require the types of variables to be repeated: def : Pat<(subc i32:$b, i32:$c), (SUBCCrr i32:$b, i32:$c)>; This is preferable: def : Pat<(subc i32:$b, i32:$c), (SUBCCrr $b, $c)>; llvm-svn: 177843		2013-03-24 19:36:51 +00:00
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LangRef.rst	Allow TableGen DAG arguments to be just a name.	2013-03-24 19:36:51 +00:00