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Create a wrapper pass for BlockFrequencyInfo.

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This is useful when we want to do block frequency analysis
conditionally (e.g. only in PGO mode) but don't want to add
one more pass dependence.

Patch by congh.
Approved by dexonsmith.
Differential Revision: http://reviews.llvm.org/D11196


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242248 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Wei Mi
2015-07-14 23:40:50 +00:00
parent 37de644bfb
commit d5892380e1
5 changed files with 80 additions and 49 deletions
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80
lib/Analysis/BlockFrequencyInfo.cpp
View File

@@ -105,31 +105,9 @@ struct DOTGraphTraits<BlockFrequencyInfo*> : public DefaultDOTGraphTraits {
} // end namespace llvm
#endif
INITIALIZE_PASS_BEGIN(BlockFrequencyInfo, "block-freq",
"Block Frequency Analysis", true, true)
INITIALIZE_PASS_DEPENDENCY(BranchProbabilityInfo)
INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
INITIALIZE_PASS_END(BlockFrequencyInfo, "block-freq",
"Block Frequency Analysis", true, true)
char BlockFrequencyInfo::ID = 0;
BlockFrequencyInfo::BlockFrequencyInfo() : FunctionPass(ID) {
initializeBlockFrequencyInfoPass(*PassRegistry::getPassRegistry());
}
BlockFrequencyInfo::~BlockFrequencyInfo() {}
void BlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<BranchProbabilityInfo>();
AU.addRequired<LoopInfoWrapperPass>();
AU.setPreservesAll();
}
bool BlockFrequencyInfo::runOnFunction(Function &F) {
BranchProbabilityInfo &BPI = getAnalysis<BranchProbabilityInfo>();
LoopInfo &LI = getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
void BlockFrequencyInfo::calculate(const Function &F,
const BranchProbabilityInfo &BPI,
const LoopInfo &LI) {
if (!BFI)
BFI.reset(new ImplType);
BFI->doFunction(&F, &BPI, &LI);
@@ -137,13 +115,6 @@ bool BlockFrequencyInfo::runOnFunction(Function &F) {
if (ViewBlockFreqPropagationDAG != GVDT_None)
view();
#endif
return false;
}
void BlockFrequencyInfo::releaseMemory() { BFI.reset(); }
void BlockFrequencyInfo::print(raw_ostream &O, const Module *) const {
if (BFI) BFI->print(O);
}
BlockFrequency BlockFrequencyInfo::getBlockFreq(const BasicBlock *BB) const {
@@ -180,3 +151,48 @@ BlockFrequencyInfo::printBlockFreq(raw_ostream &OS,
uint64_t BlockFrequencyInfo::getEntryFreq() const {
return BFI ? BFI->getEntryFreq() : 0;
}
void BlockFrequencyInfo::releaseMemory() { BFI.reset(); }
void BlockFrequencyInfo::print(raw_ostream &OS) const {
if (BFI)
BFI->print(OS);
}
INITIALIZE_PASS_BEGIN(BlockFrequencyInfoWrapperPass, "block-freq",
"Block Frequency Analysis", true, true)
INITIALIZE_PASS_DEPENDENCY(BranchProbabilityInfo)
INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
INITIALIZE_PASS_END(BlockFrequencyInfoWrapperPass, "block-freq",
"Block Frequency Analysis", true, true)
char BlockFrequencyInfoWrapperPass::ID = 0;
BlockFrequencyInfoWrapperPass::BlockFrequencyInfoWrapperPass()
: FunctionPass(ID) {
initializeBlockFrequencyInfoWrapperPassPass(*PassRegistry::getPassRegistry());
}
BlockFrequencyInfoWrapperPass::~BlockFrequencyInfoWrapperPass() {}
void BlockFrequencyInfoWrapperPass::print(raw_ostream &OS,
const Module *) const {
BFI.print(OS);
}
void BlockFrequencyInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<BranchProbabilityInfo>();
AU.addRequired<LoopInfoWrapperPass>();
AU.setPreservesAll();
}
void BlockFrequencyInfoWrapperPass::releaseMemory() { BFI.releaseMemory(); }
bool BlockFrequencyInfoWrapperPass::runOnFunction(Function &F) {
BranchProbabilityInfo &BPI = getAnalysis<BranchProbabilityInfo>();
LoopInfo &LI = getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
BFI.calculate(F, BPI, LI);
return false;
}