[llvm] [llvm-profgen][SPGO] Support profiles with multiple concurrent processes (PR #169353)

[via llvm-commits]

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@@ -60,6 +60,13 @@ static cl::opt<int> CSProfMaxUnsymbolizedCtxDepth(
              "means no depth limit."),
     cl::cat(ProfGenCategory));
 
+static cl::opt<bool> MultiProcessProfile(
+    "multi-process-profile",
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HighW4y2H3ll wrote:

Why do we need a separate cmdline arg to flag multiple pid? Can’t we already know this when user passes multiple pids?

https://github.com/llvm/llvm-project/pull/169353