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Use std::vector instead of TargetRegisterInfo::FirstVirtualRegister. This time

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make sure to allocate enough space in the std::vector.

llvm-svn: 108449
This commit is contained in:
Bill Wendling 2010-07-15 19:58:14 +00:00
parent 6dfc02e0fc
commit 5803639a36
3 changed files with 24 additions and 18 deletions
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10
lib/CodeGen/AggressiveAntiDepBreaker.cpp
View File

@ -41,11 +41,11 @@ DebugMod("agg-antidep-debugmod",
AggressiveAntiDepState::AggressiveAntiDepState(const unsigned TargetRegs,
MachineBasicBlock *BB) :
NumTargetRegs(TargetRegs), GroupNodes(TargetRegs, 0) {
GroupNodeIndices.reserve(TargetRegs);
KillIndices.reserve(TargetRegs);
DefIndices.reserve(TargetRegs);
NumTargetRegs(TargetRegs), GroupNodes(TargetRegs, 0),
GroupNodeIndices(TargetRegs, 0),
KillIndices(TargetRegs, 0),
DefIndices(TargetRegs, 0)
{
const unsigned BBSize = BB->size();
for (unsigned i = 0; i < NumTargetRegs; ++i) {
// Initialize all registers to be in their own group. Initially we

25
lib/CodeGen/CriticalAntiDepBreaker.cpp
View File

@ -32,21 +32,23 @@ CriticalAntiDepBreaker(MachineFunction& MFi) :
MRI(MF.getRegInfo()),
TII(MF.getTarget().getInstrInfo()),
TRI(MF.getTarget().getRegisterInfo()),
AllocatableSet(TRI->getAllocatableSet(MF))
{
}
AllocatableSet(TRI->getAllocatableSet(MF)),
Classes(TRI->getNumRegs(), static_cast<const TargetRegisterClass *>(0)),
KillIndices(TRI->getNumRegs(), 0),
DefIndices(TRI->getNumRegs(), 0) {}
CriticalAntiDepBreaker::~CriticalAntiDepBreaker() {
}
void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
// Clear out the register class data.
std::fill(Classes, array_endof(Classes),
static_cast<const TargetRegisterClass *>(0));
Classes.clear();
// Initialize the indices to indicate that no registers are live.
const unsigned BBSize = BB->size();
for (unsigned i = 0; i < TRI->getNumRegs(); ++i) {
for (unsigned i = 0, e = TRI->getNumRegs(); i != e; ++i) {
// Clear out the register class data.
Classes[i] = static_cast<const TargetRegisterClass *>(0);
// Initialize the indices to indicate that no registers are live.
KillIndices[i] = ~0u;
DefIndices[i] = BBSize;
}
@ -65,6 +67,7 @@ void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BB->size();
DefIndices[Reg] = ~0u;
// Repeat, for all aliases.
for (const unsigned *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias) {
unsigned AliasReg = *Alias;
@ -86,6 +89,7 @@ void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BB->size();
DefIndices[Reg] = ~0u;
// Repeat, for all aliases.
for (const unsigned *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias) {
unsigned AliasReg = *Alias;
@ -106,6 +110,7 @@ void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BB->size();
DefIndices[Reg] = ~0u;
// Repeat, for all aliases.
for (const unsigned *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias) {
unsigned AliasReg = *Alias;
@ -134,8 +139,10 @@ void CriticalAntiDepBreaker::Observe(MachineInstr *MI, unsigned Count,
for (unsigned Reg = 0; Reg != TRI->getNumRegs(); ++Reg)
if (DefIndices[Reg] < InsertPosIndex && DefIndices[Reg] >= Count) {
assert(KillIndices[Reg] == ~0u && "Clobbered register is live!");
// Mark this register to be non-renamable.
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
// Move the def index to the end of the previous region, to reflect
// that the def could theoretically have been scheduled at the end.
DefIndices[Reg] = InsertPosIndex;
@ -433,7 +440,7 @@ BreakAntiDependencies(const std::vector<SUnit>& SUnits,
// fix that remaining critical edge too. This is a little more involved,
// because unlike the most recent register, less recent registers should
// still be considered, though only if no other registers are available.
unsigned LastNewReg[TargetRegisterInfo::FirstVirtualRegister] = {};
std::vector<unsigned> LastNewReg(TRI->getNumRegs(), 0);
// Attempt to break anti-dependence edges on the critical path. Walk the
// instructions from the bottom up, tracking information about liveness

7
lib/CodeGen/CriticalAntiDepBreaker.h
View File

@ -46,19 +46,18 @@ class TargetRegisterInfo;
/// corresponding value is null. If the register is live but used in
/// multiple register classes, the corresponding value is -1 casted to a
/// pointer.
const TargetRegisterClass *
Classes[TargetRegisterInfo::FirstVirtualRegister];
std::vector<const TargetRegisterClass*> Classes;
/// RegRegs - Map registers to all their references within a live range.
std::multimap<unsigned, MachineOperand *> RegRefs;
/// KillIndices - The index of the most recent kill (proceding bottom-up),
/// or ~0u if the register is not live.
unsigned KillIndices[TargetRegisterInfo::FirstVirtualRegister];
std::vector<unsigned> KillIndices;
/// DefIndices - The index of the most recent complete def (proceding bottom
/// up), or ~0u if the register is live.
unsigned DefIndices[TargetRegisterInfo::FirstVirtualRegister];
std::vector<unsigned> DefIndices;
/// KeepRegs - A set of registers which are live and cannot be changed to
/// break anti-dependencies.