[llvm] [Offload] Update allocations to include device (PR #154733)

[Ross Brunton via llvm-commits]

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@@ -124,8 +125,8 @@ struct OffloadContext {
 
   bool TracingEnabled = false;
   bool ValidationEnabled = true;
-  DenseMap<void *, AllocInfo> AllocInfoMap{};
-  std::mutex AllocInfoMapMutex{};
+  SmallVector<AllocInfo> AllocInfoList{};
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RossBrunton wrote:

I considered having this be a `Map<void *, SmallVector<AllocInfo>>`, however I think it's better if functions like `olMemGetInfo` accept any address inside the allocation instead of just the start. This makes that logic much less clunky.

https://github.com/llvm/llvm-project/pull/154733