TableGen/CodeGenDAGPatterns: addPredicateFn only once

Summary:
The predicate function is added in InlinePatternFragments, no need to
do it here. As a result, all uses of addPredicateFn are located in
InlinePatternFragments.

Test confirmed that there are no changes to generated files when
building all (non-experimental) targets.

Change-Id: I720e42e045ca596eb0aa339fb61adf6fe71034d5

Reviewers: arsenm, rampitec, RKSimon, craig.topper, hfinkel, uweigand

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D51993

llvm-svn: 343977

llvm/utils/TableGen/CodeGenDAGPatterns.cpp

@@ -3037,13 +3037,6 @@ void CodeGenDAGPatterns::ParsePatternFragments(bool OutFrags) {
       P->error("Operands list does not contain an entry for operand '" +
                *OperandsSet.begin() + "'!");
 
-    // If there is a code init for this fragment, keep track of the fact that
-    // this fragment uses it.
-    TreePredicateFn PredFn(P);
-    if (!PredFn.isAlwaysTrue())
-      for (auto T : P->getTrees())
-        T->addPredicateFn(PredFn);
-
     // If there is a node transformation corresponding to this, keep track of
     // it.
     Record *Transform = Frag->getValueAsDef("OperandTransform");

llvm/utils/TableGen/CodeGenDAGPatterns.h

@@ -673,8 +673,8 @@ public:
   }
   void addPredicateFn(const TreePredicateFn &Fn) {
     assert(!Fn.isAlwaysTrue() && "Empty predicate string!");
-    if (!is_contained(PredicateFns, Fn))
-      PredicateFns.push_back(Fn);
+    assert(!is_contained(PredicateFns, Fn) && "predicate applied recursively");
+    PredicateFns.push_back(Fn);
   }
 
   Record *getTransformFn() const { return TransformFn; }