[Driver] Simplify -f[no-]sized-deallocation forwarding. NFC

Author: MaskRay

clang/lib/Driver/ToolChains/Clang.cpp

@@ -7265,13 +7265,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
 
   // -fsized-deallocation is on by default in C++14 onwards and otherwise off
   // by default.
-  if (Arg *A = Args.getLastArg(options::OPT_fsized_deallocation,
-                               options::OPT_fno_sized_deallocation)) {
-    if (A->getOption().matches(options::OPT_fno_sized_deallocation))
-      CmdArgs.push_back("-fno-sized-deallocation");
-    else
-      CmdArgs.push_back("-fsized-deallocation");
-  }
+  Args.addLastArg(CmdArgs, options::OPT_fsized_deallocation,
+                  options::OPT_fno_sized_deallocation);
 
   // -faligned-allocation is on by default in C++17 onwards and otherwise off
   // by default.

llvm/include/llvm/Option/ArgList.h

@@ -319,11 +319,15 @@ class ArgList {
   }
 
   /// Render only the last argument match \p Id0, if present.
-  template<typename ...OptSpecifiers>
-  void AddLastArg(ArgStringList &Output, OptSpecifiers ...Ids) const {
+  template <typename... OptSpecifiers>
+  void addLastArg(ArgStringList &Output, OptSpecifiers... Ids) const {
     if (Arg *A = getLastArg(Ids...)) // Calls claim() on all Ids's Args.
       A->render(*this, Output);
   }
+  template <typename... OptSpecifiers>
+  void AddLastArg(ArgStringList &Output, OptSpecifiers... Ids) const {
+    addLastArg(Output, Ids...);
+  }
 
   /// AddAllArgsExcept - Render all arguments matching any of the given ids
   /// and not matching any of the excluded ids.