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Stop tracking spill slot uses in VirtRegMap.

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Nobody cared, StackSlotColoring scans the instructions to find used stack
slots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144485 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-11-13 01:23:30 +00:00
parent 3cb0b0edd9
commit cb39064e7a
6 changed files with 2 additions and 82 deletions
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22
lib/CodeGen/VirtRegMap.h
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@@ -74,12 +74,6 @@ namespace llvm {
/// mapping.
IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2SplitMap;
/// LowSpillSlot, HighSpillSlot - Lowest and highest spill slot indexes.
int LowSpillSlot, HighSpillSlot;
/// SpillSlotToUsesMap - Records uses for each register spill slot.
SmallVector<SmallPtrSet<MachineInstr*, 4>, 8> SpillSlotToUsesMap;
/// createSpillSlot - Allocate a spill slot for RC from MFI.
unsigned createSpillSlot(const TargetRegisterClass *RC);
@@ -89,8 +83,7 @@ namespace llvm {
public:
static char ID;
VirtRegMap() : MachineFunctionPass(ID), Virt2PhysMap(NO_PHYS_REG),
Virt2StackSlotMap(NO_STACK_SLOT), Virt2SplitMap(0),
LowSpillSlot(NO_STACK_SLOT), HighSpillSlot(NO_STACK_SLOT) { }
Virt2StackSlotMap(NO_STACK_SLOT), Virt2SplitMap(0) { }
virtual bool runOnMachineFunction(MachineFunction &MF);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
@@ -198,19 +191,6 @@ namespace llvm {
/// the specified stack slot
void assignVirt2StackSlot(unsigned virtReg, int frameIndex);
/// @brief Records a spill slot use.
void addSpillSlotUse(int FrameIndex, MachineInstr *MI);
/// @brief Returns true if spill slot has been used.
bool isSpillSlotUsed(int FrameIndex) const {
assert(FrameIndex >= 0 && "Spill slot index should not be negative!");
return !SpillSlotToUsesMap[FrameIndex-LowSpillSlot].empty();
}
/// RemoveMachineInstrFromMaps - MI is being erased, remove it from the
/// the folded instruction map and spill point map.
void RemoveMachineInstrFromMaps(MachineInstr *MI);
/// rewrite - Rewrite all instructions in MF to use only physical registers
/// by mapping all virtual register operands to their assigned physical
/// registers.