use signed for arithemtic & avoid copy

Author: chios202

mlir/include/mlir/Query/Matcher/Marshallers.h

@@ -177,7 +177,7 @@ class VariadicOperatorMatcherDescriptor : public MatcherDescriptor {
     }
 
     std::vector<VariantMatcher> innerArgs;
-    for (size_t i = 0, e = args.size(); i != e; ++i) {
+    for (int64_t i = 0, e = args.size(); i != e; ++i) {
       const ParserValue &arg = args[i];
       const VariantValue &value = arg.value;
       if (!value.isMatcher()) {

mlir/include/mlir/Query/Matcher/MatchersInternal.h

@@ -102,7 +102,8 @@ using VariadicOperatorFunction = bool (*)(Operation *op,
 template <VariadicOperatorFunction Func>
 class VariadicMatcher : public MatcherInterface {
 public:
-  VariadicMatcher(std::vector<DynMatcher> matchers) : matchers(matchers) {}
+  VariadicMatcher(std::vector<DynMatcher> matchers)
+      : matchers(std::move(matchers)) {}
 
   bool match(Operation *op) override { return Func(op, nullptr, matchers); }
   bool match(Operation *op, SetVector<Operation *> &matchedOps) override {