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-rw-r--r--lib/Target/Target.td6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/Target.td b/lib/Target/Target.td
index a268e16410..92c40570af 100644
--- a/lib/Target/Target.td
+++ b/lib/Target/Target.td
@@ -259,6 +259,12 @@ def ins;
/// of operands.
def variable_ops;
+/// discard definition - Mark this operand as being matched in the input
+/// but omitted from the output. This is necessary in some situations
+/// involving variable_ops to help the pattern matcher determine which
+/// input nodes to forward on to the variable_ops portion of the output.
+def discard;
+
/// ptr_rc definition - Mark this operand as being a pointer value whose
/// register class is resolved dynamically via a callback to TargetInstrInfo.
/// FIXME: We should probably change this to a class which contain a list of