TableGen: Pattern<> references to null_frag are a nop.
A standalone pattern defined in a multiclass expansion should handle
null_frag references just like patterns on instructions. Follow-up to
r160333.
llvm-svn: 160384
diff --git a/llvm/utils/TableGen/CodeGenDAGPatterns.cpp b/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
index 09c00dd..34f8a34 100644
--- a/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -2908,6 +2908,11 @@
for (unsigned i = 0, e = Patterns.size(); i != e; ++i) {
Record *CurPattern = Patterns[i];
DagInit *Tree = CurPattern->getValueAsDag("PatternToMatch");
+
+ // If the pattern references the null_frag, there's nothing to do.
+ if (hasNullFragReference(Tree))
+ continue;
+
TreePattern *Pattern = new TreePattern(CurPattern, Tree, true, *this);
// Inline pattern fragments into it.