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Remember to resize SpillSlotToUsesMap when allocating an emergency spill slot.

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Use amazing new function call technology instead of writing identical code in
multiple places.

This fixes PR8604.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119306 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-11-16 00:41:01 +00:00
parent 7c2e4a8715
commit b55e91e087
2 changed files with 19 additions and 19 deletions
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35
lib/CodeGen/VirtRegMap.cpp
View File

@ -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) {

3
lib/CodeGen/VirtRegMap.h
View File

@ -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