[llvm] [memprof] Use CSId to construct MemProfRecord (PR #88362)

[Kazu Hirata via llvm-commits]

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@@ -57,6 +57,36 @@ class MemProfReader {
     return FunctionProfileData;
   }
 
+  // Convert IndexedMemProfRecord to MemProfRecord, populating call stacks and
+  // frames inline.
+  virtual MemProfRecord convertIndexedMemProfRecordToMemProfRecord(
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kazutakahirata wrote:

Done.  Now the call back converts `CallStackId` to `llvm::SmallVector<Frame>`.  That is, the conversion from `FrameId` to `Frame` is handled behind the scenes.

https://github.com/llvm/llvm-project/pull/88362