Use unique_ptr to remove explicit delete.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224224 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/DAGISelEmitter.cpp

@@ -157,12 +157,12 @@ void DAGISelEmitter::run(raw_ostream &OS) {
     }
   }
 
-  Matcher *TheMatcher = new ScopeMatcher(PatternMatchers);
+  std::unique_ptr<Matcher> TheMatcher =
+    llvm::make_unique<ScopeMatcher>(PatternMatchers);
 
-  TheMatcher = OptimizeMatcher(TheMatcher, CGP);
+  OptimizeMatcher(TheMatcher, CGP);
   //Matcher->dump();
-  EmitMatcherTable(TheMatcher, CGP, OS);
-  delete TheMatcher;
+  EmitMatcherTable(TheMatcher.get(), CGP, OS);
 }
 
 namespace llvm {

utils/TableGen/DAGISelMatcher.h

@@ -30,7 +30,8 @@ namespace llvm {
 
 Matcher *ConvertPatternToMatcher(const PatternToMatch &Pattern,unsigned Variant,
                                  const CodeGenDAGPatterns &CGP);
-Matcher *OptimizeMatcher(Matcher *Matcher, const CodeGenDAGPatterns &CGP);
+void OptimizeMatcher(std::unique_ptr<Matcher> &Matcher,
+                     const CodeGenDAGPatterns &CGP);
 void EmitMatcherTable(const Matcher *Matcher, const CodeGenDAGPatterns &CGP,
                       raw_ostream &OS);
 

utils/TableGen/DAGISelMatcherOpt.cpp

@@ -511,11 +511,10 @@ static void FactorNodes(std::unique_ptr<Matcher> &MatcherPtr) {
     Scope->resetChild(i, NewOptionsToMatch[i]);
 }
 
-Matcher *llvm::OptimizeMatcher(Matcher *TheMatcher,
-                               const CodeGenDAGPatterns &CGP) {
-  std::unique_ptr<Matcher> MatcherPtr(TheMatcher);
+void
+llvm::OptimizeMatcher(std::unique_ptr<Matcher> &MatcherPtr,
+                      const CodeGenDAGPatterns &CGP) {
   ContractNodes(MatcherPtr, CGP);
   SinkPatternPredicates(MatcherPtr);
   FactorNodes(MatcherPtr);
-  return MatcherPtr.release();
 }