[llvm] [ctx_prof] CtxProfAnalysis: populate module data (PR #102930)

[Snehasish Kumar via llvm-commits]

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@@ -9,23 +9,38 @@
 #ifndef LLVM_ANALYSIS_CTXPROFANALYSIS_H
 #define LLVM_ANALYSIS_CTXPROFANALYSIS_H
 
+#include "llvm/ADT/StringMap.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/ProfileData/PGOCtxProfReader.h"
-#include <map>
 
 namespace llvm {
 
 class CtxProfAnalysis;
 
 /// The instrumented contextual profile, produced by the CtxProfAnalysis.
 class PGOContextualProfile {
+  friend class CtxProfAnalysis;
+  friend class CtxProfAnalysisPrinterPass;
+  struct FunctionInfo {
+    uint32_t NextCounterIndex = 0;
+    uint32_t NextCallsiteIndex = 0;
+    const std::string Name;
+
+    FunctionInfo(StringRef Name) : Name(Name) {}
+  };
   std::optional<PGOCtxProfContext::CallTargetMapTy> Profiles;
+  // For the GUIDs in this module, associate metadata about each function which
+  // we'll need when we maintain the profiles during IPO transformations.
+  DenseMap<GlobalValue::GUID, FunctionInfo> FuncInfo;
 
-public:
-  explicit PGOContextualProfile(PGOCtxProfContext::CallTargetMapTy &&Profiles)
-      : Profiles(std::move(Profiles)) {}
+  GlobalValue::GUID getKnownGUID(const Function &F) const;
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snehasish wrote:

Prefer `getGUID(...)` and document it returns zero if unknown and also define what it means to be `known`?

https://github.com/llvm/llvm-project/pull/102930