[wasm] Simplify. NFC

llvm-svn: 358663

lld/wasm/SymbolTable.cpp

@@ -491,7 +491,7 @@ bool SymbolTable::getFunctionVariant(Symbol* Sym, const WasmSignature *Sig,
   // Linear search through symbol variants.  Should never be more than two
   // or three entries here.
   auto &Variants = SymVariants[CachedHashStringRef(Sym->getName())];
-  if (Variants.size() == 0)
+  if (Variants.empty())
     Variants.push_back(Sym);
 
   for (Symbol* V : Variants) {

lld/wasm/Writer.cpp

@@ -718,12 +718,12 @@ void Writer::createProducersSection() {
 }
 
 void Writer::createTargetFeaturesSection() {
-  if (TargetFeatures.size() == 0)
+  if (TargetFeatures.empty())
     return;
 
   SmallVector<std::string, 8> Emitted(TargetFeatures.begin(),
                                       TargetFeatures.end());
-  std::sort(Emitted.begin(), Emitted.end());
+  llvm::sort(Emitted);
   SyntheticSection *Section =
       createSyntheticSection(WASM_SEC_CUSTOM, "target_features");
   auto &OS = Section->getStream();

lld/wasm/WriterUtils.cpp

@@ -196,7 +196,7 @@ std::string lld::toString(const WasmSignature &Sig) {
     S += toString(Type);
   }
   S += ") -> ";
-  if (Sig.Returns.size() == 0)
+  if (Sig.Returns.empty())
     S += "void";
   else
     S += toString(Sig.Returns[0]);