[StableHash] Implement with xxh3_64bits (#105849)

This is a follow-up to address a suggestion from
https://github.com/llvm/llvm-project/pull/105619.
The main goal of this change is to efficiently implement stable hash
functions using the xxh3 64bits API.
`stable_hash_combine_range` and `stable_hash_combine_array` functions
are removed and consolidated into a more general `stable_hash_combine`
function that takes an `ArrayRef<stable_hash>` as input.

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineOperand.cpp b/llvm/lib/CodeGen/MachineOperand.cpp
index ace0590..a0726ca 100644
--- a/llvm/lib/CodeGen/MachineOperand.cpp
+++ b/llvm/lib/CodeGen/MachineOperand.cpp
@@ -424,8 +424,7 @@ hash_code llvm::hash_value(const MachineOperand &MO) {
       const uint32_t *RegMask = MO.getRegMask();
       std::vector<stable_hash> RegMaskHashes(RegMask, RegMask + RegMaskSize);
       return hash_combine(MO.getType(), MO.getTargetFlags(),
-                          stable_hash_combine_array(RegMaskHashes.data(),
-                                                    RegMaskHashes.size()));
+                          stable_hash_combine(RegMaskHashes));
     }
 
     assert(0 && "MachineOperand not associated with any MachineFunction");