[llvm] [ctxprof] Don't import roots elsewhere (PR #134012)

[Snehasish Kumar via llvm-commits]

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@@ -544,6 +545,10 @@ class WorkloadImportsManager : public ModuleImportsManager {
   // determine if a module's import list should be done by the base
   // ModuleImportsManager or by us.
   StringMap<DenseSet<ValueInfo>> Workloads;
+  // Track the roots to avoid importing them due to other callers. We want there
+  // to be only one variant, for which we optimize according to the contextual
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snehasish wrote:

It wasn't clear to me what you mean by `variant`. Can you elaborate?

https://github.com/llvm/llvm-project/pull/134012