[llvm] [ctx_profile] Decouple ctx instrumentation from PGOOpt (PR #92445)

[Teresa Johnson via llvm-commits]

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@@ -1157,8 +1153,12 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
   const bool IsPGOInstrUse =
       IsPGOPreLink && PGOOpt->Action == PGOOptions::IRUse;
   const bool IsMemprofUse = IsPGOPreLink && !PGOOpt->MemoryProfile.empty();
+  // We don't want to mix pgo ctx gen and pgo gen; we also don't currently
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teresajohnson wrote:

should there be an assert that fires if both are enabled?

https://github.com/llvm/llvm-project/pull/92445