mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
269 lines
11 KiB
C++
269 lines
11 KiB
C++
//=-- Profilesummary.cpp - Profile summary support --------------------------=//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains support for converting profile summary data from/to
|
|
// metadata.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/IR/ProfileSummary.h"
|
|
#include "llvm/IR/Attributes.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/Metadata.h"
|
|
#include "llvm/IR/Type.h"
|
|
#include "llvm/Support/Casting.h"
|
|
#include "llvm/Support/Format.h"
|
|
|
|
using namespace llvm;
|
|
|
|
// Return an MDTuple with two elements. The first element is a string Key and
|
|
// the second is a uint64_t Value.
|
|
static Metadata *getKeyValMD(LLVMContext &Context, const char *Key,
|
|
uint64_t Val) {
|
|
Type *Int64Ty = Type::getInt64Ty(Context);
|
|
Metadata *Ops[2] = {MDString::get(Context, Key),
|
|
ConstantAsMetadata::get(ConstantInt::get(Int64Ty, Val))};
|
|
return MDTuple::get(Context, Ops);
|
|
}
|
|
|
|
static Metadata *getKeyFPValMD(LLVMContext &Context, const char *Key,
|
|
double Val) {
|
|
Type *DoubleTy = Type::getDoubleTy(Context);
|
|
Metadata *Ops[2] = {MDString::get(Context, Key),
|
|
ConstantAsMetadata::get(ConstantFP::get(DoubleTy, Val))};
|
|
return MDTuple::get(Context, Ops);
|
|
}
|
|
|
|
// Return an MDTuple with two elements. The first element is a string Key and
|
|
// the second is a string Value.
|
|
static Metadata *getKeyValMD(LLVMContext &Context, const char *Key,
|
|
const char *Val) {
|
|
Metadata *Ops[2] = {MDString::get(Context, Key), MDString::get(Context, Val)};
|
|
return MDTuple::get(Context, Ops);
|
|
}
|
|
|
|
// This returns an MDTuple representing the detiled summary. The tuple has two
|
|
// elements: a string "DetailedSummary" and an MDTuple representing the value
|
|
// of the detailed summary. Each element of this tuple is again an MDTuple whose
|
|
// elements are the (Cutoff, MinCount, NumCounts) triplet of the
|
|
// DetailedSummaryEntry.
|
|
Metadata *ProfileSummary::getDetailedSummaryMD(LLVMContext &Context) {
|
|
std::vector<Metadata *> Entries;
|
|
Type *Int32Ty = Type::getInt32Ty(Context);
|
|
Type *Int64Ty = Type::getInt64Ty(Context);
|
|
for (auto &Entry : DetailedSummary) {
|
|
Metadata *EntryMD[3] = {
|
|
ConstantAsMetadata::get(ConstantInt::get(Int32Ty, Entry.Cutoff)),
|
|
ConstantAsMetadata::get(ConstantInt::get(Int64Ty, Entry.MinCount)),
|
|
ConstantAsMetadata::get(ConstantInt::get(Int32Ty, Entry.NumCounts))};
|
|
Entries.push_back(MDTuple::get(Context, EntryMD));
|
|
}
|
|
Metadata *Ops[2] = {MDString::get(Context, "DetailedSummary"),
|
|
MDTuple::get(Context, Entries)};
|
|
return MDTuple::get(Context, Ops);
|
|
}
|
|
|
|
// This returns an MDTuple representing this ProfileSummary object. The first
|
|
// entry of this tuple is another MDTuple of two elements: a string
|
|
// "ProfileFormat" and a string representing the format ("InstrProf" or
|
|
// "SampleProfile"). The rest of the elements of the outer MDTuple are specific
|
|
// to the kind of profile summary as returned by getFormatSpecificMD.
|
|
// IsPartialProfile is an optional field and \p AddPartialField will decide
|
|
// whether to add a field for it.
|
|
// PartialProfileRatio is an optional field and \p AddPartialProfileRatioField
|
|
// will decide whether to add a field for it.
|
|
Metadata *ProfileSummary::getMD(LLVMContext &Context, bool AddPartialField,
|
|
bool AddPartialProfileRatioField) {
|
|
const char *KindStr[3] = {"InstrProf", "CSInstrProf", "SampleProfile"};
|
|
SmallVector<Metadata *, 16> Components;
|
|
Components.push_back(getKeyValMD(Context, "ProfileFormat", KindStr[PSK]));
|
|
Components.push_back(getKeyValMD(Context, "TotalCount", getTotalCount()));
|
|
Components.push_back(getKeyValMD(Context, "MaxCount", getMaxCount()));
|
|
Components.push_back(
|
|
getKeyValMD(Context, "MaxInternalCount", getMaxInternalCount()));
|
|
Components.push_back(
|
|
getKeyValMD(Context, "MaxFunctionCount", getMaxFunctionCount()));
|
|
Components.push_back(getKeyValMD(Context, "NumCounts", getNumCounts()));
|
|
Components.push_back(getKeyValMD(Context, "NumFunctions", getNumFunctions()));
|
|
if (AddPartialField)
|
|
Components.push_back(
|
|
getKeyValMD(Context, "IsPartialProfile", isPartialProfile()));
|
|
if (AddPartialProfileRatioField)
|
|
Components.push_back(getKeyFPValMD(Context, "PartialProfileRatio",
|
|
getPartialProfileRatio()));
|
|
Components.push_back(getDetailedSummaryMD(Context));
|
|
return MDTuple::get(Context, Components);
|
|
}
|
|
|
|
// Get the value metadata for the input MD/Key.
|
|
static ConstantAsMetadata *getValMD(MDTuple *MD, const char *Key) {
|
|
if (!MD)
|
|
return nullptr;
|
|
if (MD->getNumOperands() != 2)
|
|
return nullptr;
|
|
MDString *KeyMD = dyn_cast<MDString>(MD->getOperand(0));
|
|
ConstantAsMetadata *ValMD = dyn_cast<ConstantAsMetadata>(MD->getOperand(1));
|
|
if (!KeyMD || !ValMD)
|
|
return nullptr;
|
|
if (!KeyMD->getString().equals(Key))
|
|
return nullptr;
|
|
return ValMD;
|
|
}
|
|
|
|
// Parse an MDTuple representing (Key, Val) pair.
|
|
static bool getVal(MDTuple *MD, const char *Key, uint64_t &Val) {
|
|
if (auto *ValMD = getValMD(MD, Key)) {
|
|
Val = cast<ConstantInt>(ValMD->getValue())->getZExtValue();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool getVal(MDTuple *MD, const char *Key, double &Val) {
|
|
if (auto *ValMD = getValMD(MD, Key)) {
|
|
Val = cast<ConstantFP>(ValMD->getValue())->getValueAPF().convertToDouble();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Check if an MDTuple represents a (Key, Val) pair.
|
|
static bool isKeyValuePair(MDTuple *MD, const char *Key, const char *Val) {
|
|
if (!MD || MD->getNumOperands() != 2)
|
|
return false;
|
|
MDString *KeyMD = dyn_cast<MDString>(MD->getOperand(0));
|
|
MDString *ValMD = dyn_cast<MDString>(MD->getOperand(1));
|
|
if (!KeyMD || !ValMD)
|
|
return false;
|
|
if (!KeyMD->getString().equals(Key) || !ValMD->getString().equals(Val))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
// Parse an MDTuple representing detailed summary.
|
|
static bool getSummaryFromMD(MDTuple *MD, SummaryEntryVector &Summary) {
|
|
if (!MD || MD->getNumOperands() != 2)
|
|
return false;
|
|
MDString *KeyMD = dyn_cast<MDString>(MD->getOperand(0));
|
|
if (!KeyMD || !KeyMD->getString().equals("DetailedSummary"))
|
|
return false;
|
|
MDTuple *EntriesMD = dyn_cast<MDTuple>(MD->getOperand(1));
|
|
if (!EntriesMD)
|
|
return false;
|
|
for (auto &&MDOp : EntriesMD->operands()) {
|
|
MDTuple *EntryMD = dyn_cast<MDTuple>(MDOp);
|
|
if (!EntryMD || EntryMD->getNumOperands() != 3)
|
|
return false;
|
|
ConstantAsMetadata *Op0 =
|
|
dyn_cast<ConstantAsMetadata>(EntryMD->getOperand(0));
|
|
ConstantAsMetadata *Op1 =
|
|
dyn_cast<ConstantAsMetadata>(EntryMD->getOperand(1));
|
|
ConstantAsMetadata *Op2 =
|
|
dyn_cast<ConstantAsMetadata>(EntryMD->getOperand(2));
|
|
|
|
if (!Op0 || !Op1 || !Op2)
|
|
return false;
|
|
Summary.emplace_back(cast<ConstantInt>(Op0->getValue())->getZExtValue(),
|
|
cast<ConstantInt>(Op1->getValue())->getZExtValue(),
|
|
cast<ConstantInt>(Op2->getValue())->getZExtValue());
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Get the value of an optional field. Increment 'Idx' if it was present. Return
|
|
// true if we can move onto the next field.
|
|
template <typename ValueType>
|
|
static bool getOptionalVal(MDTuple *Tuple, unsigned &Idx, const char *Key,
|
|
ValueType &Value) {
|
|
if (getVal(dyn_cast<MDTuple>(Tuple->getOperand(Idx)), Key, Value)) {
|
|
Idx++;
|
|
// Need to make sure when the key is present, we won't step over the bound
|
|
// of Tuple operand array. Since (non-optional) DetailedSummary always comes
|
|
// last, the next entry in the tuple operand array must exist.
|
|
return Idx < Tuple->getNumOperands();
|
|
}
|
|
// It was absent, keep going.
|
|
return true;
|
|
}
|
|
|
|
ProfileSummary *ProfileSummary::getFromMD(Metadata *MD) {
|
|
MDTuple *Tuple = dyn_cast_or_null<MDTuple>(MD);
|
|
if (!Tuple || Tuple->getNumOperands() < 8 || Tuple->getNumOperands() > 10)
|
|
return nullptr;
|
|
|
|
unsigned I = 0;
|
|
auto &FormatMD = Tuple->getOperand(I++);
|
|
ProfileSummary::Kind SummaryKind;
|
|
if (isKeyValuePair(dyn_cast_or_null<MDTuple>(FormatMD), "ProfileFormat",
|
|
"SampleProfile"))
|
|
SummaryKind = PSK_Sample;
|
|
else if (isKeyValuePair(dyn_cast_or_null<MDTuple>(FormatMD), "ProfileFormat",
|
|
"InstrProf"))
|
|
SummaryKind = PSK_Instr;
|
|
else if (isKeyValuePair(dyn_cast_or_null<MDTuple>(FormatMD), "ProfileFormat",
|
|
"CSInstrProf"))
|
|
SummaryKind = PSK_CSInstr;
|
|
else
|
|
return nullptr;
|
|
|
|
uint64_t NumCounts, TotalCount, NumFunctions, MaxFunctionCount, MaxCount,
|
|
MaxInternalCount;
|
|
if (!getVal(dyn_cast<MDTuple>(Tuple->getOperand(I++)), "TotalCount",
|
|
TotalCount))
|
|
return nullptr;
|
|
if (!getVal(dyn_cast<MDTuple>(Tuple->getOperand(I++)), "MaxCount", MaxCount))
|
|
return nullptr;
|
|
if (!getVal(dyn_cast<MDTuple>(Tuple->getOperand(I++)), "MaxInternalCount",
|
|
MaxInternalCount))
|
|
return nullptr;
|
|
if (!getVal(dyn_cast<MDTuple>(Tuple->getOperand(I++)), "MaxFunctionCount",
|
|
MaxFunctionCount))
|
|
return nullptr;
|
|
if (!getVal(dyn_cast<MDTuple>(Tuple->getOperand(I++)), "NumCounts",
|
|
NumCounts))
|
|
return nullptr;
|
|
if (!getVal(dyn_cast<MDTuple>(Tuple->getOperand(I++)), "NumFunctions",
|
|
NumFunctions))
|
|
return nullptr;
|
|
|
|
// Optional fields. Need to initialize because the fields are optional.
|
|
uint64_t IsPartialProfile = 0;
|
|
if (!getOptionalVal(Tuple, I, "IsPartialProfile", IsPartialProfile))
|
|
return nullptr;
|
|
double PartialProfileRatio = 0;
|
|
if (!getOptionalVal(Tuple, I, "PartialProfileRatio", PartialProfileRatio))
|
|
return nullptr;
|
|
|
|
SummaryEntryVector Summary;
|
|
if (!getSummaryFromMD(dyn_cast<MDTuple>(Tuple->getOperand(I++)), Summary))
|
|
return nullptr;
|
|
return new ProfileSummary(SummaryKind, std::move(Summary), TotalCount,
|
|
MaxCount, MaxInternalCount, MaxFunctionCount,
|
|
NumCounts, NumFunctions, IsPartialProfile,
|
|
PartialProfileRatio);
|
|
}
|
|
|
|
void ProfileSummary::printSummary(raw_ostream &OS) {
|
|
OS << "Total functions: " << NumFunctions << "\n";
|
|
OS << "Maximum function count: " << MaxFunctionCount << "\n";
|
|
OS << "Maximum block count: " << MaxCount << "\n";
|
|
OS << "Total number of blocks: " << NumCounts << "\n";
|
|
OS << "Total count: " << TotalCount << "\n";
|
|
}
|
|
|
|
void ProfileSummary::printDetailedSummary(raw_ostream &OS) {
|
|
OS << "Detailed summary:\n";
|
|
for (auto Entry : DetailedSummary) {
|
|
OS << Entry.NumCounts << " blocks with count >= " << Entry.MinCount
|
|
<< " account for "
|
|
<< format("%0.6g", (float)Entry.Cutoff / Scale * 100)
|
|
<< " percentage of the total counts.\n";
|
|
}
|
|
}
|