[llvm] [PseudoProbe] Warn on illegal guid (PR #148564)

[Haohai Wen via llvm-commits]

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@@ -26,6 +30,13 @@ class PseudoProbeHandler {
   // Name to GUID map, used as caching/memoization for speed.
   DenseMap<StringRef, uint64_t> NameGuidMap;
 
+#ifndef NDEBUG
+  // All GUID in llvm.pseudo_probe_desc.
+  DenseSet<uint64_t> DescGuidSet;
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HaohaiWen wrote:

SparseSet is more suitable for small key universe. It would be very big for GUID.
I think DenseSet is a greater candidate here.

https://github.com/llvm/llvm-project/pull/148564