[llvm] [TableGen] Fix the non-determinism in DFAPacketizerEmitter.cpp (PR #192037)

[David Stuttard via llvm-commits]

https://github.com/dstutt created https://github.com/llvm/llvm-project/pull/192037

Sort the std::set ProcItinList by Record name, not the pointer address.


>From 81d75d7ecca21b30ce4bb31784f8cc158117d10c Mon Sep 17 00:00:00 2001
From: "Bao, Qiaojin (Fred)" <Qiaojin.Bao at amd.com>
Date: Tue, 14 Apr 2026 14:03:26 +0800
Subject: [PATCH] Fix the non-determinism in DFAPacketizerEmitter.cpp

Sort the std::set ProcItinList by Record name, not the pointer address.
---
 llvm/utils/TableGen/DFAPacketizerEmitter.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/llvm/utils/TableGen/DFAPacketizerEmitter.cpp b/llvm/utils/TableGen/DFAPacketizerEmitter.cpp
index 8cb2c22736f8a..bd29f73dc484a 100644
--- a/llvm/utils/TableGen/DFAPacketizerEmitter.cpp
+++ b/llvm/utils/TableGen/DFAPacketizerEmitter.cpp
@@ -101,7 +101,13 @@ int DFAPacketizerEmitter::collectAllFuncUnits(
   LLVM_DEBUG(dbgs() << "collectAllFuncUnits");
   LLVM_DEBUG(dbgs() << " (" << ProcModels.size() << " itineraries)\n");
 
-  std::set<const Record *> ProcItinList;
+  struct RecordNameLess {
+    bool operator()(const Record *LHS, const Record *RHS) const {
+        return LHS->getName() < RHS->getName();
+    }
+  };
+
+  std::set<const Record *, RecordNameLess> ProcItinList;
   for (const CodeGenProcModel *Model : ProcModels)
     ProcItinList.insert(Model->ItinsDef);