diff options
| -rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 35 | ||||
| -rw-r--r-- | lib/CodeGen/VirtRegMap.h | 3 |
2 files changed, 19 insertions, 19 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index 6ed0b64..facf0c1 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -99,6 +99,20 @@ void VirtRegMap::grow() { ImplicitDefed.resize(LastVirtReg-TargetRegisterInfo::FirstVirtualRegister+1); } +unsigned VirtRegMap::createSpillSlot(const TargetRegisterClass *RC) { + int SS = MF->getFrameInfo()->CreateSpillStackObject(RC->getSize(), + RC->getAlignment()); + if (LowSpillSlot == NO_STACK_SLOT) + LowSpillSlot = SS; + if (HighSpillSlot == NO_STACK_SLOT || SS > HighSpillSlot) + HighSpillSlot = SS; + assert(SS >= LowSpillSlot && "Unexpected low spill slot"); + unsigned Idx = SS-LowSpillSlot; + while (Idx >= SpillSlotToUsesMap.size()) + SpillSlotToUsesMap.resize(SpillSlotToUsesMap.size()*2); + return SS; +} + unsigned VirtRegMap::getRegAllocPref(unsigned virtReg) { std::pair<unsigned, unsigned> Hint = MRI->getRegAllocationHint(virtReg); unsigned physReg = Hint.second; @@ -116,18 +130,8 @@ int VirtRegMap::assignVirt2StackSlot(unsigned virtReg) { assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT && "attempt to assign stack slot to already spilled register"); const TargetRegisterClass* RC = MF->getRegInfo().getRegClass(virtReg); - int SS = MF->getFrameInfo()->CreateSpillStackObject(RC->getSize(), - RC->getAlignment()); - if (LowSpillSlot == NO_STACK_SLOT) - LowSpillSlot = SS; - if (HighSpillSlot == NO_STACK_SLOT || SS > HighSpillSlot) - HighSpillSlot = SS; - unsigned Idx = SS-LowSpillSlot; - while (Idx >= SpillSlotToUsesMap.size()) - SpillSlotToUsesMap.resize(SpillSlotToUsesMap.size()*2); - Virt2StackSlotMap[virtReg] = SS; ++NumSpills; - return SS; + return Virt2StackSlotMap[virtReg] = createSpillSlot(RC); } void VirtRegMap::assignVirt2StackSlot(unsigned virtReg, int SS) { @@ -160,14 +164,7 @@ int VirtRegMap::getEmergencySpillSlot(const TargetRegisterClass *RC) { EmergencySpillSlots.find(RC); if (I != EmergencySpillSlots.end()) return I->second; - int SS = MF->getFrameInfo()->CreateSpillStackObject(RC->getSize(), - RC->getAlignment()); - if (LowSpillSlot == NO_STACK_SLOT) - LowSpillSlot = SS; - if (HighSpillSlot == NO_STACK_SLOT || SS > HighSpillSlot) - HighSpillSlot = SS; - EmergencySpillSlots[RC] = SS; - return SS; + return EmergencySpillSlots[RC] = createSpillSlot(RC); } void VirtRegMap::addSpillSlotUse(int FI, MachineInstr *MI) { diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h index 8b6082d..0bf52be 100644 --- a/lib/CodeGen/VirtRegMap.h +++ b/lib/CodeGen/VirtRegMap.h @@ -134,6 +134,9 @@ namespace llvm { /// UnusedRegs - A list of physical registers that have not been used. BitVector UnusedRegs; + /// createSpillSlot - Allocate a spill slot for RC from MFI. + unsigned createSpillSlot(const TargetRegisterClass *RC); + VirtRegMap(const VirtRegMap&); // DO NOT IMPLEMENT void operator=(const VirtRegMap&); // DO NOT IMPLEMENT |