[llvm-branch-commits] [llvm] llvm-reduce: Preserve uselistorder when writing thinlto bitcode (PR #133369)

[Teresa Johnson via llvm-branch-commits]

================
@@ -769,7 +769,11 @@ void ReducerWorkItem::readBitcode(MemoryBufferRef Data, 
LLVMContext &Ctx,
 }
 
 void ReducerWorkItem::writeBitcode(raw_ostream &OutStream) const {
+  const bool ShouldPreserveUseListOrder = true;
+
   if (LTOInfo && LTOInfo->IsThinLTO && LTOInfo->EnableSplitLTOUnit) {
+    // FIXME: This should not depend on the pass manager. There are hidden
----------------
teresajohnson wrote:

It is necessary because the pass may mutate the module by splitting into 
regular and ThinLTO sub modules. See my comment on your other PR about how to 
provoke this splitting.

https://github.com/llvm/llvm-project/pull/133369
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