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CalcSpillWeights: allow overidding the spill weight normalizing function

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This will enable the PBQP register allocator to provide its own normalizing function.

No functionnal change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194417 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnaud A. de Grandmaison
2013-11-11 19:56:14 +00:00
parent ef572e31e2
commit d736763847
2 changed files with 16 additions and 6 deletions
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7
lib/CodeGen/CalcSpillWeights.cpp
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@@ -25,12 +25,13 @@ using namespace llvm;
void llvm::calculateSpillWeightsAndHints(LiveIntervals &LIS,
MachineFunction &MF,
const MachineLoopInfo &MLI,
const MachineBlockFrequencyInfo &MBFI) {
const MachineBlockFrequencyInfo &MBFI,
VirtRegAuxInfo::NormalizingFn norm) {
DEBUG(dbgs() << "********** Compute Spill Weights **********\n"
<< "********** Function: " << MF.getName() << '\n');
MachineRegisterInfo &MRI = MF.getRegInfo();
VirtRegAuxInfo VRAI(MF, LIS, MLI, MBFI);
VirtRegAuxInfo VRAI(MF, LIS, MLI, MBFI, norm);
for (unsigned i = 0, e = MRI.getNumVirtRegs(); i != e; ++i) {
unsigned Reg = TargetRegisterInfo::index2VirtReg(i);
if (MRI.reg_nodbg_empty(Reg))
@@ -182,5 +183,5 @@ VirtRegAuxInfo::calculateSpillWeightAndHint(LiveInterval &li) {
if (isRematerializable(li, LIS, *MF.getTarget().getInstrInfo()))
totalWeight *= 0.5F;
li.weight = normalizeSpillWeight(totalWeight, li.getSize());
li.weight = normalize(totalWeight, li.getSize());
}