[llvm-branch-commits] [llvm] [AllocToken, Clang] Implement __builtin_alloc_token_infer() and llvm.alloc.token.id (PR #156842)

[Oliver Hunt via llvm-branch-commits]

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@@ -3352,10 +3352,15 @@ class CodeGenFunction : public CodeGenTypeCache {
   SanitizerAnnotateDebugInfo(ArrayRef<SanitizerKind::SanitizerOrdinal> Ordinals,
                              SanitizerHandler Handler);
 
-  /// Emit additional metadata used by the AllocToken instrumentation.
+  /// Emit metadata used by the AllocToken instrumentation.
+  llvm::MDNode *EmitAllocTokenHint(QualType AllocType);
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ojhunt wrote:

I think this should be something like `BuildAllocTokenHint` -- also does llvm permit multiple nodes to share this hint? 

This is basically a "can this be cached and reused?" question - For TMO we needed to cache Type->descriptor to avoid any compile time regression - though I guess the TMO descriptors are more expensive to produce.

https://github.com/llvm/llvm-project/pull/156842