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blockfreq: Use const in MachineBlockFrequencyInfo

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<rdar://problem/14292693>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204740 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2014-03-25 18:01:32 +00:00
parent feaa46379a
commit 8451e1baa9
4 changed files with 18 additions and 16 deletions
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18
lib/CodeGen/MachineBranchProbabilityInfo.cpp
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@ -77,8 +77,9 @@ getEdgeWeight(const MachineBasicBlock *Src,
return getEdgeWeight(Src, std::find(Src->succ_begin(), Src->succ_end(), Dst));
}
bool MachineBranchProbabilityInfo::isEdgeHot(MachineBasicBlock *Src,
MachineBasicBlock *Dst) const {
bool
MachineBranchProbabilityInfo::isEdgeHot(const MachineBasicBlock *Src,
const MachineBasicBlock *Dst) const {
// Hot probability is at least 4/5 = 80%
// FIXME: Compare against a static "hot" BranchProbability.
return getEdgeProbability(Src, Dst) > BranchProbability(4, 5);
@ -103,9 +104,8 @@ MachineBranchProbabilityInfo::getHotSucc(MachineBasicBlock *MBB) const {
return 0;
}
BranchProbability
MachineBranchProbabilityInfo::getEdgeProbability(MachineBasicBlock *Src,
MachineBasicBlock *Dst) const {
BranchProbability MachineBranchProbabilityInfo::getEdgeProbability(
const MachineBasicBlock *Src, const MachineBasicBlock *Dst) const {
uint32_t Scale = 1;
uint32_t D = getSumForBlock(Src, Scale);
uint32_t N = getEdgeWeight(Src, Dst) / Scale;
@ -113,13 +113,13 @@ MachineBranchProbabilityInfo::getEdgeProbability(MachineBasicBlock *Src,
return BranchProbability(N, D);
}
raw_ostream &MachineBranchProbabilityInfo::
printEdgeProbability(raw_ostream &OS, MachineBasicBlock *Src,
MachineBasicBlock *Dst) const {
raw_ostream &MachineBranchProbabilityInfo::printEdgeProbability(
raw_ostream &OS, const MachineBasicBlock *Src,
const MachineBasicBlock *Dst) const {
const BranchProbability Prob = getEdgeProbability(Src, Dst);
OS << "edge MBB#" << Src->getNumber() << " -> MBB#" << Dst->getNumber()
<< " probability is " << Prob
<< " probability is " << Prob
<< (isEdgeHot(Src, Dst) ? " [HOT edge]\n" : "\n");
return OS;