[llvm] [ctxprof] Support for "move" semantics for the contextual root (PR #134192)

[Mircea Trofin via llvm-commits]

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@@ -24,6 +24,31 @@ static cl::opt<bool> UseSourceFilenameForPromotedLocals(
              "This requires that the source filename has a unique name / "
              "path to avoid name collisions."));
 
+extern cl::list<GlobalValue::GUID> MoveSymbolGUID;
+
+FunctionImportGlobalProcessing::FunctionImportGlobalProcessing(
+    Module &M, const ModuleSummaryIndex &Index,
+    SetVector<GlobalValue *> *GlobalsToImport, bool ClearDSOLocalOnDeclarations)
+    : M(M), ImportIndex(Index), GlobalsToImport(GlobalsToImport),
+      ClearDSOLocalOnDeclarations(ClearDSOLocalOnDeclarations) {
+  // If we have a ModuleSummaryIndex but no function to import,
+  // then this is the primary module being compiled in a ThinLTO
+  // backend compilation, and we need to see if it has functions that
+  // may be exported to another backend compilation.
+  if (!GlobalsToImport)
+    HasExportedFunctions = ImportIndex.hasExportedFunctions(M);
+
+#ifndef NDEBUG
+  SmallVector<GlobalValue *, 4> Vec;
+  // First collect those in the llvm.used set.
+  collectUsedGlobalVariables(M, Vec, /*CompilerUsed=*/false);
+  // Next collect those in the llvm.compiler.used set.
+  collectUsedGlobalVariables(M, Vec, /*CompilerUsed=*/true);
+  Used = {llvm::from_range, Vec};
+#endif
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mtrofin wrote:

This is code that moved from the .h as-is. I could split it into a NFC, but seemed overkill. To your question, IDK, but wouldn't address it here.

https://github.com/llvm/llvm-project/pull/134192