From be336295cd0415c69d929ad61a0c9bf6f2608cea Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Sat, 9 Jun 2012 00:14:47 +0000 Subject: Also compute MBB live-in lists in the new rewriter pass. This deduplicates some code from the optimizing register allocators, and it means that it is now possible to change the register allocators' solutions simply by editing the VirtRegMap between the register allocator pass and the rewriter. llvm-svn: 158249 --- llvm/lib/CodeGen/RegAllocBase.cpp | 38 -------------------------------------- 1 file changed, 38 deletions(-) (limited to 'llvm/lib/CodeGen/RegAllocBase.cpp') diff --git a/llvm/lib/CodeGen/RegAllocBase.cpp b/llvm/lib/CodeGen/RegAllocBase.cpp index 3349b4448c1..c5425047222 100644 --- a/llvm/lib/CodeGen/RegAllocBase.cpp +++ b/llvm/lib/CodeGen/RegAllocBase.cpp @@ -225,41 +225,3 @@ unsigned RegAllocBase::checkPhysRegInterference(LiveInterval &VirtReg, return *AI; return 0; } - -// Add newly allocated physical registers to the MBB live in sets. -void RegAllocBase::addMBBLiveIns(MachineFunction *MF) { - NamedRegionTimer T("MBB Live Ins", TimerGroupName, TimePassesIsEnabled); - SlotIndexes *Indexes = LIS->getSlotIndexes(); - if (MF->size() <= 1) - return; - - LiveIntervalUnion::SegmentIter SI; - for (unsigned PhysReg = 0, NumRegs = TRI->getNumRegs(); PhysReg != NumRegs; - ++PhysReg) { - LiveIntervalUnion &LiveUnion = PhysReg2LiveUnion[PhysReg]; - if (LiveUnion.empty()) - continue; - DEBUG(dbgs() << PrintReg(PhysReg, TRI) << " live-in:"); - MachineFunction::iterator MBB = llvm::next(MF->begin()); - MachineFunction::iterator MFE = MF->end(); - SlotIndex Start, Stop; - tie(Start, Stop) = Indexes->getMBBRange(MBB); - SI.setMap(LiveUnion.getMap()); - SI.find(Start); - while (SI.valid()) { - if (SI.start() <= Start) { - if (!MBB->isLiveIn(PhysReg)) - MBB->addLiveIn(PhysReg); - DEBUG(dbgs() << "\tBB#" << MBB->getNumber() << ':' - << PrintReg(SI.value()->reg, TRI)); - } else if (SI.start() > Stop) - MBB = Indexes->getMBBFromIndex(SI.start().getPrevIndex()); - if (++MBB == MFE) - break; - tie(Start, Stop) = Indexes->getMBBRange(MBB); - SI.advanceTo(Start); - } - DEBUG(dbgs() << '\n'); - } -} - -- cgit v1.2.3