Hoist serialized size computation outside the loop.

Author: snehasish

llvm/lib/ProfileData/IndexedMemProfData.cpp

@@ -249,8 +249,7 @@ static Error writeMemProfRadixTreeBased(
 
   uint64_t RecordPayloadOffset = OS.tell();
   uint64_t RecordTableOffset = writeMemProfRecords(
-      OS, MemProfData.Records, &Schema, Version, // Pass Version
-      &MemProfCallStackIndexes);
+      OS, MemProfData.Records, &Schema, Version, &MemProfCallStackIndexes);
 
   // Verify that the computation for the number of elements in the call stack
   // array works.

llvm/lib/ProfileData/MemProf.cpp

@@ -276,12 +276,13 @@ static IndexedMemProfRecord deserializeV4(const MemProfSchema &Schema,
   const uint64_t NumNodes =
       endian::readNext<uint64_t, llvm::endianness::little>(Ptr);
   Record.AllocSites.reserve(NumNodes);
+  const size_t SerializedSize = PortableMemInfoBlock::serializedSize(Schema);
   for (uint64_t I = 0; I < NumNodes; I++) {
     IndexedAllocationInfo Node;
     Node.CSId =
         endian::readNext<LinearCallStackId, llvm::endianness::little>(Ptr);
     Node.Info.deserialize(Schema, Ptr);
-    Ptr += PortableMemInfoBlock::serializedSize(Schema);
+    Ptr += SerializedSize;
     Record.AllocSites.push_back(Node);
   }