274       MemoryAccess *FirstDef = &*Defs->begin();  in insertUse()  local
277       if (auto *MD = dyn_cast<MemoryDef>(FirstDef))  in insertUse()
278         FirstDef = MD->getDefiningAccess();  in insertUse()
280       MSSA->renamePass(MU->getBlock(), FirstDef, Visited);  in insertUse()
440     MemoryAccess *FirstDef = &*MSSA->getWritableBlockDefs(StartBlock)->begin();  in insertDef()  local
443     if (auto *MD = dyn_cast<MemoryDef>(FirstDef))  in insertDef()
444       FirstDef = MD->getDefiningAccess();  in insertDef()
446     MSSA->renamePass(MD->getBlock(), FirstDef, Visited);  in insertDef()
501         auto *FirstDef = &*Defs->begin();  in fixupDefs()  local
503         assert(!isa<MemoryPhi>(FirstDef) &&  in fixupDefs()
507         assert(MSSA->dominates(NewDef, FirstDef) &&  in fixupDefs()
513         cast<MemoryDef>(FirstDef)->setDefiningAccess(getPreviousDef(FirstDef));  in fixupDefs()