[llvm-branch-commits] [llvm] [NFC][MachineBlockHashInfo] Fork hash_16_bytes to guarantee stability (PR #192862)

[Matt Arsenault via llvm-branch-commits]

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@@ -21,31 +20,48 @@
 
 using namespace llvm;
 
+// Forked from `hashing::detail::hash_16_bytes` to provide stability.
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arsenm wrote:

The static asserts here also serve as the don't change check 

https://github.com/llvm/llvm-project/pull/192862