[llvm] [memprof] Teach extractCallsFromIR to look into inline stacks (PR #115441)

[Snehasish Kumar via llvm-commits]

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@@ -824,11 +824,14 @@ memprof::extractCallsFromIR(Module &M) {
           continue;
 
         StringRef CalleeName = CalledFunction->getName();
-        uint64_t CallerGUID =
-            IndexedMemProfRecord::getGUID(DIL->getSubprogramLinkageName());
-        uint64_t CalleeGUID = IndexedMemProfRecord::getGUID(CalleeName);
-        LineLocation Loc = {GetOffset(DIL), DIL->getColumn()};
-        Calls[CallerGUID].emplace_back(Loc, CalleeGUID);
+        do {
+          uint64_t CallerGUID =
+              IndexedMemProfRecord::getGUID(DIL->getSubprogramLinkageName());
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snehasish wrote:

Should we assert that SubProgramLinkageName is not empty? 
Same for the usage on L833.

https://github.com/llvm/llvm-project/pull/115441