[llvm] [ThinLTO]Record import type in GlobalValueSummary::GVFlags (PR #87597)

[Teresa Johnson via llvm-commits]

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@@ -432,6 +432,18 @@ class GlobalValueSummary {
   /// Sububclass discriminator (for dyn_cast<> et al.)
   enum SummaryKind : unsigned { AliasKind, FunctionKind, GlobalVarKind };
 
+  enum ImportKind : unsigned {
+    // The global value definition corresponding to the summary should be
+    // imported from source module
+    Definition = 0,
+
+    // When its definition doesn't exist in the destination module and not
+    // imported (e.g., function is large to be inlined), the global value
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teresajohnson wrote:

"too large"

https://github.com/llvm/llvm-project/pull/87597