[memprof] Use std::move in ContextEdge::ContextEdge (NFC) (llvm#94687)

Since the constructor of ContextEdge takes ContextIds by value, we
should move it to the corresponding member variable as suggested by
clang-tidy's performance-unnecessary-value-param.

While we are at it, this patch updates a couple of callers.  To avoid
the ambiguity in the evaluation order among the constructor arguments,
I'm calling computeAllocType before calling the constructor.

Author: kazutakahirata

llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp

@@ -402,7 +402,7 @@ class CallsiteContextGraph {
     ContextEdge(ContextNode *Callee, ContextNode *Caller, uint8_t AllocType,
                 DenseSet<uint32_t> ContextIds)
         : Callee(Callee), Caller(Caller), AllocTypes(AllocType),
-          ContextIds(ContextIds) {}
+          ContextIds(std::move(ContextIds)) {}
 
     DenseSet<uint32_t> &getContextIds() { return ContextIds; }
 
@@ -1127,15 +1127,15 @@ void CallsiteContextGraph<DerivedCCG, FuncTy, CallTy>::connectNewNode(
       continue;
     }
     if (TowardsCallee) {
+      uint8_t NewAllocType = computeAllocType(NewEdgeContextIds);
       auto NewEdge = std::make_shared<ContextEdge>(
-          Edge->Callee, NewNode, computeAllocType(NewEdgeContextIds),
-          NewEdgeContextIds);
+          Edge->Callee, NewNode, NewAllocType, std::move(NewEdgeContextIds));
       NewNode->CalleeEdges.push_back(NewEdge);
       NewEdge->Callee->CallerEdges.push_back(NewEdge);
     } else {
+      uint8_t NewAllocType = computeAllocType(NewEdgeContextIds);
       auto NewEdge = std::make_shared<ContextEdge>(
-          NewNode, Edge->Caller, computeAllocType(NewEdgeContextIds),
-          NewEdgeContextIds);
+          NewNode, Edge->Caller, NewAllocType, std::move(NewEdgeContextIds));
       NewNode->CallerEdges.push_back(NewEdge);
       NewEdge->Caller->CalleeEdges.push_back(NewEdge);
     }