[llvm] [PowerPC] Use `SmallSetVector` to enable determined build (PR #89875)

[Kai Luo via llvm-commits]

https://github.com/bzEq created https://github.com/llvm/llvm-project/pull/89875

This is to address the issue in https://lab.llvm.org/buildbot/#/builders/54.
`SmallSetVector` interfaces as set and can be iterated in a determined order.

>From 9f9c034c43ed726552230213f214328a4420a3a9 Mon Sep 17 00:00:00 2001
From: Kai Luo <lkail at cn.ibm.com>
Date: Wed, 24 Apr 2024 05:54:38 +0000
Subject: [PATCH] Use SmallSetVector

---
 llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
index 6e1002c45d81cb..51b79dc2b04b4e 100644
--- a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -27,7 +27,7 @@
 #include "PPCTargetStreamer.h"
 #include "TargetInfo/PowerPCTargetInfo.h"
 #include "llvm/ADT/MapVector.h"
-#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
@@ -242,7 +242,7 @@ class PPCAIXAsmPrinter : public PPCAsmPrinter {
 private:
   /// Symbols lowered from ExternalSymbolSDNodes, we will need to emit extern
   /// linkage for them in AIX.
-  SmallPtrSet<MCSymbol *, 8> ExtSymSDNodeSymbols;
+  SmallSetVector<MCSymbol *, 8> ExtSymSDNodeSymbols;
 
   /// A format indicator and unique trailing identifier to form part of the
   /// sinit/sterm function names.