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Use getNumVirtualRegs().

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Whitespace cleanups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11389 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-02-13 18:20:47 +00:00
parent 87af94b291
commit 4de473bc59
1 changed files with 34 additions and 41 deletions
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25
lib/CodeGen/RegAllocLocal.cpp
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@ -58,12 +58,6 @@ namespace {
&& "VirtReg not in map!");
return Virt2PhysRegMap[VirtReg-MRegisterInfo::FirstVirtualRegister];
}
unsigned &getOrInsertVirt2PhysRegMapSlot(unsigned VirtReg) {
assert(VirtReg >= MRegisterInfo::FirstVirtualRegister &&"Illegal VREG #");
if (VirtReg-MRegisterInfo::FirstVirtualRegister >= Virt2PhysRegMap.size())
Virt2PhysRegMap.resize(VirtReg-MRegisterInfo::FirstVirtualRegister+1);
return Virt2PhysRegMap[VirtReg-MRegisterInfo::FirstVirtualRegister];
}
// PhysRegsUsed - This array is effectively a map, containing entries for
// each physical register that currently has a value (ie, it is in
@ -73,7 +67,7 @@ namespace {
// because it is used by a future instruction. If the entry for a physical
// register is -1, then the physical register is "not in the map".
//
int PhysRegsUsed[MRegisterInfo::FirstVirtualRegister];
std::vector<int> PhysRegsUsed;
// PhysRegsUseOrder - This contains a list of the physical registers that
// currently have a virtual register value in them. This list provides an
@ -319,7 +313,7 @@ void RA::assignVirtToPhysReg(unsigned VirtReg, unsigned PhysReg) {
// Update information to note the fact that this register was just used, and
// it holds VirtReg.
PhysRegsUsed[PhysReg] = VirtReg;
getOrInsertVirt2PhysRegMapSlot(VirtReg) = PhysReg;
getVirt2PhysRegMapSlot(VirtReg) = PhysReg;
PhysRegsUseOrder.push_back(PhysReg); // New use of PhysReg
}
@ -471,7 +465,7 @@ unsigned RA::getReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator &I,
unsigned RA::reloadVirtReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator &I,
unsigned VirtReg) {
if (unsigned PR = getOrInsertVirt2PhysRegMapSlot(VirtReg)) {
if (unsigned PR = getVirt2PhysRegMapSlot(VirtReg)) {
MarkPhysRegRecentlyUsed(PR);
return PR; // Already have this value available!
}
@ -594,7 +588,7 @@ void RA::AllocateBasicBlock(MachineBasicBlock &MBB) {
unsigned DestPhysReg;
// If DestVirtReg already has a value, use it.
if (!(DestPhysReg = getOrInsertVirt2PhysRegMapSlot(DestVirtReg)))
if (!(DestPhysReg = getVirt2PhysRegMapSlot(DestVirtReg)))
DestPhysReg = getReg(MBB, MI, DestVirtReg);
markVirtRegModified(DestVirtReg);
MI->SetMachineOperandReg(i, DestPhysReg); // Assign the output register
@ -664,12 +658,11 @@ bool RA::runOnMachineFunction(MachineFunction &Fn) {
TM = &Fn.getTarget();
RegInfo = TM->getRegisterInfo();
memset(PhysRegsUsed, -1, RegInfo->getNumRegs()*sizeof(unsigned));
PhysRegsUsed.assign(RegInfo->getNumRegs(), -1);
// Reserve some space for a moderate number of registers. If we know what the
// max virtual register number was we could use that instead and save some
// runtime overhead...
Virt2PhysRegMap.resize(1024);
// initialize the virtual->physical register map to have a 'null'
// mapping for all virtual registers
Virt2PhysRegMap.assign(MF->getSSARegMap()->getNumVirtualRegs(), 0);
if (!DisableKill)
LV = &getAnalysis<LiveVariables>();
@ -680,6 +673,7 @@ bool RA::runOnMachineFunction(MachineFunction &Fn) {
AllocateBasicBlock(*MBB);
StackSlotForVirtReg.clear();
PhysRegsUsed.clear();
VirtRegModified.clear();
Virt2PhysRegMap.clear();
return true;
@ -688,4 +682,3 @@ bool RA::runOnMachineFunction(MachineFunction &Fn) {
FunctionPass *llvm::createLocalRegisterAllocator() {
return new RA();
}