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Completely eliminate the intervals_ list. instead, the r2iMap_ maintains

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ownership of the intervals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15155 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-07-24 03:32:06 +00:00
parent 7ac2d3146a
commit 4df98e546d
5 changed files with 96 additions and 102 deletions
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lib/CodeGen/RegAllocIterativeScan.cpp
+8 -10
View File
@@ -85,7 +85,7 @@ namespace {
/// initIntervalSets - initializes the four interval sets:
/// unhandled, fixed, active and inactive
void initIntervalSets(LiveIntervals::Intervals& li);
void initIntervalSets();
/// processActiveIntervals - expire old intervals and move
/// non-overlapping ones to the incative list
@@ -151,9 +151,9 @@ bool RA::runOnMachineFunction(MachineFunction &fn) {
vrm_.reset(new VirtRegMap(*mf_));
if (!spiller_.get()) spiller_.reset(createSpiller());
initIntervalSets(li_->getIntervals());
initIntervalSets();
numIntervals += li_->getIntervals().size();
numIntervals += li_->getNumIntervals();
while (linearScan()) {
// we spilled some registers, so we need to add intervals for
@@ -251,17 +251,15 @@ bool RA::linearScan()
return !spilled_.empty();
}
void RA::initIntervalSets(LiveIntervals::Intervals& li)
{
void RA::initIntervalSets() {
assert(unhandled_.empty() && fixed_.empty() &&
active_.empty() && inactive_.empty() &&
"interval sets should be empty on initialization");
for (LiveIntervals::Intervals::iterator i = li.begin(), e = li.end();
i != e; ++i) {
unhandled_.push_back(&*i);
if (MRegisterInfo::isPhysicalRegister(i->reg))
fixed_.push_back(&*i);
for (LiveIntervals::iterator i = li_->begin(), e = li_->end(); i != e; ++i){
unhandled_.push_back(i->second);
if (MRegisterInfo::isPhysicalRegister(i->second->reg))
fixed_.push_back(i->second);
}
}