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Update these register allocators to set the PhysRegUsed info in MachineFunction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19791 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-01-23 22:45:13 +00:00
parent ce9c41e77a
commit b0f31bf19b
3 changed files with 35 additions and 11 deletions
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11
lib/CodeGen/RegAllocLinearScan.cpp
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@@ -48,6 +48,7 @@ namespace {
const TargetMachine* tm_;
const MRegisterInfo* mri_;
LiveIntervals* li_;
bool *PhysRegsUsed;
/// handled_ - Intervals are added to the handled_ set in the order of their
/// start value. This is uses for backtracking.
@@ -139,6 +140,10 @@ bool RA::runOnMachineFunction(MachineFunction &fn) {
mri_ = tm_->getRegisterInfo();
li_ = &getAnalysis<LiveIntervals>();
PhysRegsUsed = new bool[mri_->getNumRegs()];
std::fill(PhysRegsUsed, PhysRegsUsed+mri_->getNumRegs(), false);
fn.setUsedPhysRegs(PhysRegsUsed);
if (!prt_.get()) prt_.reset(new PhysRegTracker(*mri_));
vrm_.reset(new VirtRegMap(*mf_));
if (!spiller_.get()) spiller_.reset(createSpiller());
@@ -147,6 +152,7 @@ bool RA::runOnMachineFunction(MachineFunction &fn) {
linearScan();
// Rewrite spill code and update the PhysRegsUsed set.
spiller_->runOnMachineFunction(*mf_, *vrm_);
vrm_.reset(); // Free the VirtRegMap
@@ -170,9 +176,10 @@ void RA::initIntervalSets()
"interval sets should be empty on initialization");
for (LiveIntervals::iterator i = li_->begin(), e = li_->end(); i != e; ++i) {
if (MRegisterInfo::isPhysicalRegister(i->second.reg))
if (MRegisterInfo::isPhysicalRegister(i->second.reg)) {
PhysRegsUsed[i->second.reg] = true;
fixed_.push_back(std::make_pair(&i->second, i->second.begin()));
else
} else
unhandled_.push(&i->second);
}
}