268       MemoryAccess *FirstDef = &*Defs->begin();  in insertUse()  local
271       if (auto *MD = dyn_cast<MemoryDef>(FirstDef))  in insertUse()
272         FirstDef = MD->getDefiningAccess();  in insertUse()
274       MSSA->renamePass(MU->getBlock(), FirstDef, Visited);  in insertUse()
438     MemoryAccess *FirstDef = &*MSSA->getWritableBlockDefs(StartBlock)->begin();  in insertDef()  local
441     if (auto *MD = dyn_cast<MemoryDef>(FirstDef))  in insertDef()
442       FirstDef = MD->getDefiningAccess();  in insertDef()
444     MSSA->renamePass(MD->getBlock(), FirstDef, Visited);  in insertDef()
498         auto *FirstDef = &*Defs->begin();  in fixupDefs()  local
500         assert(!isa<MemoryPhi>(FirstDef) &&  in fixupDefs()
504         assert(MSSA->dominates(NewDef, FirstDef) &&  in fixupDefs()
510         cast<MemoryDef>(FirstDef)->setDefiningAccess(getPreviousDef(FirstDef));  in fixupDefs()