[llvm] Use std::tie to implement comparison functors (NFC) (#141353)

Author: kazutakahirata

llvm/lib/Transforms/IPO/SampleProfile.cpp

@@ -897,9 +897,7 @@ updateIDTMetaData(Instruction &Inst,
 
   llvm::sort(NewCallTargets,
              [](const InstrProfValueData &L, const InstrProfValueData &R) {
-               if (L.Count != R.Count)
-                 return L.Count > R.Count;
-               return L.Value > R.Value;
+               return std::tie(L.Count, L.Value) > std::tie(R.Count, R.Value);
              });
 
   uint32_t MaxMDCount =

llvm/tools/llvm-exegesis/lib/SchedClassResolution.cpp

@@ -69,11 +69,7 @@ getNonRedundantWriteProcRes(const MCSchedClassDesc &SCDesc,
        [](const ResourceMaskAndEntry &A, const ResourceMaskAndEntry &B) {
          unsigned popcntA = popcount(A.first);
          unsigned popcntB = popcount(B.first);
-         if (popcntA < popcntB)
-           return true;
-         if (popcntA > popcntB)
-           return false;
-         return A.first < B.first;
+         return std::tie(popcntA, A.first) < std::tie(popcntB, B.first);
        });
 
   SmallVector<float, 32> ProcResUnitUsage(NumProcRes);