================
@@ -1240,11 +1240,22 @@ void IRLinker::linkNamedMDNodes() {
if (IsPerformingImport && NMD.getName() == "llvm.stats")
continue;
+ // Default subtarget info is only intended to be used before LTO and
+ // shouldn't be present after merging because the default subtargets may be
+ // different. Even if they were the same we wouldn't want to keep them to
+ // avoid introducing bugs that would only occur when merging modules with
+ // different subtarget info.
+ if (NMD.getName() == "llvm.subtarget.info")
----------------
jrtc27 wrote:
This seems to be an overly simplistic take. Downstream we need a subset of the
target features during LTO, and it wouldn't surprise me if there are cases
upstream that could benefit from it too.
https://github.com/llvm/llvm-project/pull/98673
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