[llvm] [memprof] Add IndexedMemProfReader::getMemProfCallerCalleePairs (PR #115807)

[Teresa Johnson via llvm-commits]

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@@ -1666,6 +1666,35 @@ IndexedMemProfReader::getMemProfRecord(const uint64_t FuncNameHash) const {
               memprof::MaximumSupportedVersion));
 }
 
+DenseMap<uint64_t, SmallVector<memprof::CallEdgeTy, 0>>
+IndexedMemProfReader::getMemProfCallerCalleePairs() const {
+  assert(MemProfRecordTable);
+  assert(Version == memprof::Version3);
+
+  memprof::LinearFrameIdConverter FrameIdConv(FrameBase);
+  memprof::CallerCalleePairExtractor Extractor(CallStackBase, FrameIdConv);
+
+  // Collect the set of linear call stack IDs.  Since we expect a lot of
+  // duplicates, we first collect them in the form a bit vector before
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teresajohnson wrote:

Should this be "form *of* a bit vector"?  But I'm not sure I follow where a bit vector comes in. Can you correct this comment or otherwise make it clearer?

https://github.com/llvm/llvm-project/pull/115807