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Factor the numbering computation into a separate method, and add the slightest attempt at some renumbering logic, which is currently unused.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51652 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-05-28 20:54:50 +00:00
parent d77d4f98fb
commit 80b3ce65e2
2 changed files with 32 additions and 11 deletions
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3
include/llvm/CodeGen/LiveIntervalAnalysis.h
View File

@ -306,6 +306,9 @@ namespace llvm {
/// computeIntervals - Compute live intervals.
void computeIntervals();
/// computeNumbering - Compute the index numbering.
void computeNumbering();
/// handleRegisterDef - update intervals for a register def
/// (calls handlePhysicalRegisterDef and
/// handleVirtualRegisterDef)

40
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -75,17 +75,14 @@ void LiveIntervals::releaseMemory() {
delete ClonedMIs[i];
}
/// runOnMachineFunction - Register allocate the whole function
///
bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
mf_ = &fn;
mri_ = &mf_->getRegInfo();
tm_ = &fn.getTarget();
tri_ = tm_->getRegisterInfo();
tii_ = tm_->getInstrInfo();
lv_ = &getAnalysis<LiveVariables>();
allocatableRegs_ = tri_->getAllocatableSet(fn);
void LiveIntervals::computeNumbering() {
Index2MiMap OldI2MI = i2miMap_;
Idx2MBBMap.clear();
MBB2IdxMap.clear();
mi2iMap_.clear();
i2miMap_.clear();
// Number MachineInstrs and MachineBasicBlocks.
// Initialize MBB indexes to a sentinal.
MBB2IdxMap.resize(mf_->getNumBlockIDs(), std::make_pair(~0U,~0U));
@ -110,7 +107,28 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
Idx2MBBMap.push_back(std::make_pair(StartIdx, MBB));
}
std::sort(Idx2MBBMap.begin(), Idx2MBBMap.end(), Idx2MBBCompare());
if (!OldI2MI.empty())
for (iterator I = begin(), E = end(); I != E; ++I)
for (LiveInterval::iterator LI = I->second.begin(), LE = I->second.end();
LI != LE; ++LI) {
LI->start = mi2iMap_[OldI2MI[LI->start]];
LI->end = mi2iMap_[OldI2MI[LI->end]];
}
}
/// runOnMachineFunction - Register allocate the whole function
///
bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
mf_ = &fn;
mri_ = &mf_->getRegInfo();
tm_ = &fn.getTarget();
tri_ = tm_->getRegisterInfo();
tii_ = tm_->getInstrInfo();
lv_ = &getAnalysis<LiveVariables>();
allocatableRegs_ = tri_->getAllocatableSet(fn);
computeNumbering();
computeIntervals();
numIntervals += getNumIntervals();