[llvm] [polly] [Plugins] Address review comments on -plugin-arg (PR #227545)

[Michael Kruse via llvm-commits]

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@@ -692,7 +692,13 @@ void registerPollyPasses(PassBuilder &PB) {
 } // namespace polly
 
 static Error parseArguments(ArrayRef<const char *> Args) {
-  return parsePassPluginCommandLine("Polly", Args);
+  SmallVector<const char *, 0> Argv = {"Polly"};
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Meinersbur wrote:

Our programmer's manual prefers something different:

https://llvm.org/docs/ProgrammersManual.html#llvm-adt-smallvector-h

> In the absence of a well-motivated choice for the number of inlined elements N, it is recommended to use `SmallVector<T>` (that is, omitting the N). 

https://github.com/llvm/llvm-project/pull/227545