[llvm-branch-commits] [clang] [AllocToken, Clang] Implement TypeHashPointerSplit mode (PR #156840)

[Hans Wennborg via llvm-branch-commits]

================
@@ -205,6 +231,26 @@ class TypeHashMode : public ModeBase {
   }
 };
 
+/// Implementation for TokenMode::TypeHashPointerSplit.
+class TypeHashPointerSplitMode : public TypeHashMode {
+public:
+  using TypeHashMode::TypeHashMode;
+
+  uint64_t operator()(const CallBase &CB, OptimizationRemarkEmitter &ORE) {
+    if (MaxTokens == 1)
+      return 0;
+    const uint64_t HalfTokens =
+        (MaxTokens ? MaxTokens : std::numeric_limits<uint64_t>::max()) / 2;
----------------
zmodem wrote:

Should probably set this based on the target pointer width. As it's written, we'll lose the "contains pointer" half in truncation on 32-bit.

https://github.com/llvm/llvm-project/pull/156840