Fix side-effect order for COMMA in impStoreStruct (#112455)

Author: EgorBo

src/coreclr/jit/importer.cpp

@@ -1004,16 +1004,35 @@ GenTree* Compiler::impStoreStruct(GenTree*         store,
     }
     else if (src->OperIs(GT_COMMA))
     {
+        GenTree* sideEffectAddressStore = nullptr;
+        if (store->OperIs(GT_STORE_BLK, GT_STOREIND) && ((store->AsIndir()->Addr()->gtFlags & GTF_ALL_EFFECT) != 0))
+        {
+            TempInfo addrTmp         = fgMakeTemp(store->AsIndir()->Addr());
+            sideEffectAddressStore   = addrTmp.store;
+            store->AsIndir()->Addr() = addrTmp.load;
+        }
+
         if (pAfterStmt)
         {
             // Insert op1 after '*pAfterStmt'
+            if (sideEffectAddressStore != nullptr)
+            {
+                Statement* addrStmt = gtNewStmt(sideEffectAddressStore, usedDI);
+                fgInsertStmtAfter(block, *pAfterStmt, addrStmt);
+                *pAfterStmt = addrStmt;
+            }
+
             Statement* newStmt = gtNewStmt(src->AsOp()->gtOp1, usedDI);
             fgInsertStmtAfter(block, *pAfterStmt, newStmt);
             *pAfterStmt = newStmt;
         }
         else if (impLastStmt != nullptr)
         {
             // Do the side-effect as a separate statement.
+            if (sideEffectAddressStore != nullptr)
+            {
+                impAppendTree(sideEffectAddressStore, curLevel, usedDI);
+            }
             impAppendTree(src->AsOp()->gtOp1, curLevel, usedDI);
         }
         else
@@ -1026,6 +1045,10 @@ GenTree* Compiler::impStoreStruct(GenTree*         store,
             gtUpdateNodeSideEffects(store);
             src->SetAllEffectsFlags(src->AsOp()->gtOp1, src->AsOp()->gtOp2);
 
+            if (sideEffectAddressStore != nullptr)
+            {
+                src = gtNewOperNode(GT_COMMA, src->TypeGet(), sideEffectAddressStore, src);
+            }
             return src;
         }