[lld] [lld][InstrProf] Profile guided function order (PR #96268)

[Ellis Hoag via llvm-commits]

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@@ -352,7 +353,14 @@ void macho::PriorityBuilder::parseOrderFile(StringRef path) {
 DenseMap<const InputSection *, size_t>
 macho::PriorityBuilder::buildInputSectionPriorities() {
   DenseMap<const InputSection *, size_t> sectionPriorities;
-  if (config->callGraphProfileSort) {
+  if (!config->profileGuidedFunctionOrderPath.empty() ||
+      config->functionOrderForCompression || config->dataOrderForCompression) {
+    TimeTraceScope timeScope("Balanced Partitioning Section Orderer");
+    sectionPriorities = runBalancedPartitioning(
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ellishg wrote:

I could also emit an error if the user tries to supply `--irpgo-profile-sort` and `-order-file`. Otherwise we don't want to silently ignore the orderfile.

https://github.com/llvm/llvm-project/pull/96268