[flang] Use llvm::is_contained (NFC) (#102999)

Author: kazutakahirata

flang/lib/Evaluate/intrinsics.cpp

@@ -2628,10 +2628,7 @@ bool IntrinsicProcTable::Implementation::IsDualIntrinsic(
   static const std::string dualIntrinsic[]{
       {"etime"s}, {"getcwd"s}, {"rename"s}, {"second"s}};
 
-  return std::find_if(std::begin(dualIntrinsic), std::end(dualIntrinsic),
-             [&name](const std::string &dualName) {
-               return dualName == name;
-             }) != std::end(dualIntrinsic);
+  return llvm::is_contained(dualIntrinsic, name);
 }
 
 IntrinsicClass IntrinsicProcTable::Implementation::GetIntrinsicClass(

flang/lib/Lower/OpenMP/OpenMP.cpp

@@ -1700,10 +1700,10 @@ genTargetOp(lower::AbstractConverter &converter, lower::SymMap &symTable,
     // map for it.
     if (const Fortran::semantics::Symbol *common =
             Fortran::semantics::FindCommonBlockContaining(sym.GetUltimate()))
-      if (llvm::find(mapSyms, common) != mapSyms.end())
+      if (llvm::is_contained(mapSyms, common))
         return;
 
-    if (llvm::find(mapSyms, &sym) == mapSyms.end()) {
+    if (!llvm::is_contained(mapSyms, &sym)) {
       mlir::Value baseOp = converter.getSymbolAddress(sym);
       if (!baseOp)
         if (const auto *details =