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blockfreq: Implement Pass::releaseMemory()

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Implement Pass::releaseMemory() in BlockFrequencyInfo and
MachineBlockFrequencyInfo.  Just delete the private implementation when
not in use.  Switch to a std::unique_ptr to make the logic more clear.

<rdar://problem/14292693>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204741 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2014-03-25 18:01:38 +00:00
parent 8451e1baa9
commit 27e1ca8189
4 changed files with 29 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/MachineBlockFrequencyInfo.cpp
+10 -10
View File
@@ -121,13 +121,9 @@ char MachineBlockFrequencyInfo::ID = 0;
MachineBlockFrequencyInfo::
MachineBlockFrequencyInfo() :MachineFunctionPass(ID) {
initializeMachineBlockFrequencyInfoPass(*PassRegistry::getPassRegistry());
MBFI = new BlockFrequencyImpl<MachineBasicBlock, MachineFunction,
MachineBranchProbabilityInfo>();
}
MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() {
delete MBFI;
}
MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() {}
void MachineBlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<MachineBranchProbabilityInfo>();
@@ -138,6 +134,8 @@ void MachineBlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
bool MachineBlockFrequencyInfo::runOnMachineFunction(MachineFunction &F) {
MachineBranchProbabilityInfo &MBPI =
getAnalysis<MachineBranchProbabilityInfo>();
if (!MBFI)
MBFI.reset(new ImplType);
MBFI->doFunction(&F, &MBPI);
#ifndef NDEBUG
if (ViewMachineBlockFreqPropagationDAG != GVDT_None) {
@@ -147,6 +145,8 @@ bool MachineBlockFrequencyInfo::runOnMachineFunction(MachineFunction &F) {
return false;
}
void MachineBlockFrequencyInfo::releaseMemory() { MBFI.reset(); }
/// Pop up a ghostview window with the current block frequency propagation
/// rendered using dot.
void MachineBlockFrequencyInfo::view() const {
@@ -162,25 +162,25 @@ void MachineBlockFrequencyInfo::view() const {
BlockFrequency MachineBlockFrequencyInfo::
getBlockFreq(const MachineBasicBlock *MBB) const {
return MBFI->getBlockFreq(MBB);
return MBFI ? MBFI->getBlockFreq(MBB) : 0;
}
const MachineFunction *MachineBlockFrequencyInfo::getFunction() const {
return MBFI->Fn;
return MBFI ? MBFI->Fn : nullptr;
}
raw_ostream &
MachineBlockFrequencyInfo::printBlockFreq(raw_ostream &OS,
const BlockFrequency Freq) const {
return MBFI->printBlockFreq(OS, Freq);
return MBFI ? MBFI->printBlockFreq(OS, Freq) : OS;
}
raw_ostream &
MachineBlockFrequencyInfo::printBlockFreq(raw_ostream &OS,
const MachineBasicBlock *MBB) const {
return MBFI->printBlockFreq(OS, MBB);
return MBFI ? MBFI->printBlockFreq(OS, MBB) : OS;
}
uint64_t MachineBlockFrequencyInfo::getEntryFreq() const {
return MBFI->getEntryFreq();
return MBFI ? MBFI->getEntryFreq() : 0;
}