2577     SmallPtrSet<MachineBasicBlock *, 32> DefBlocks;  in placeMLocPHIs()  local
2582         DefBlocks.insert(MBB);  in placeMLocPHIs()
2588     if (!DefBlocks.empty())  in placeMLocPHIs()
2589       DefBlocks.insert(&*MF.begin());  in placeMLocPHIs()
2594     BlockPHIPlacement(AllBlocks, DefBlocks, PHIBlocks);  in placeMLocPHIs()
2785     const SmallPtrSetImpl<MachineBasicBlock *> &DefBlocks,  in BlockPHIPlacement()  argument
2793   IDF.setDefiningBlocks(DefBlocks);  in BlockPHIPlacement()
3216     SmallPtrSet<MachineBasicBlock *, 32> DefBlocks;  in buildVLocValueMap()  local
3220         DefBlocks.insert(const_cast<MachineBasicBlock *>(ExpMBB));  in buildVLocValueMap()
3227     if (DefBlocks.size() == 1) {  in buildVLocValueMap()
3228       placePHIsForSingleVarDefinition(MutBlocksToExplore, *DefBlocks.begin(),  in buildVLocValueMap()
3234     BlockPHIPlacement(MutBlocksToExplore, DefBlocks, PHIBlocks);  in buildVLocValueMap()