mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-12-05 10:17:36 +00:00
f3262a2cdf
llvm-svn: 320630
216 lines
7.7 KiB
C++
216 lines
7.7 KiB
C++
//===- ProfileSummaryInfoTest.cpp - ProfileSummaryInfo unit tests ---------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/ProfileSummaryInfo.h"
|
|
#include "llvm/Analysis/BlockFrequencyInfo.h"
|
|
#include "llvm/Analysis/BranchProbabilityInfo.h"
|
|
#include "llvm/Analysis/LoopInfo.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
#include "llvm/IR/BasicBlock.h"
|
|
#include "llvm/IR/CallSite.h"
|
|
#include "llvm/IR/Dominators.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/MDBuilder.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "llvm/Support/FormatVariadic.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
namespace llvm {
|
|
namespace {
|
|
|
|
class ProfileSummaryInfoTest : public testing::Test {
|
|
protected:
|
|
LLVMContext C;
|
|
std::unique_ptr<BranchProbabilityInfo> BPI;
|
|
std::unique_ptr<DominatorTree> DT;
|
|
std::unique_ptr<LoopInfo> LI;
|
|
|
|
ProfileSummaryInfo buildPSI(Module *M) {
|
|
return ProfileSummaryInfo(*M);
|
|
}
|
|
BlockFrequencyInfo buildBFI(Function &F) {
|
|
DT.reset(new DominatorTree(F));
|
|
LI.reset(new LoopInfo(*DT));
|
|
BPI.reset(new BranchProbabilityInfo(F, *LI));
|
|
return BlockFrequencyInfo(F, *BPI, *LI);
|
|
}
|
|
std::unique_ptr<Module> makeLLVMModule(const char *ProfKind = nullptr) {
|
|
const char *ModuleString =
|
|
"define i32 @g(i32 %x) !prof !21 {{\n"
|
|
" ret i32 0\n"
|
|
"}\n"
|
|
"define i32 @h(i32 %x) !prof !22 {{\n"
|
|
" ret i32 0\n"
|
|
"}\n"
|
|
"define i32 @f(i32 %x) !prof !20 {{\n"
|
|
"bb0:\n"
|
|
" %y1 = icmp eq i32 %x, 0 \n"
|
|
" br i1 %y1, label %bb1, label %bb2, !prof !23 \n"
|
|
"bb1:\n"
|
|
" %z1 = call i32 @g(i32 %x)\n"
|
|
" br label %bb3\n"
|
|
"bb2:\n"
|
|
" %z2 = call i32 @h(i32 %x)\n"
|
|
" br label %bb3\n"
|
|
"bb3:\n"
|
|
" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
|
|
" ret i32 %y2\n"
|
|
"}\n"
|
|
"!20 = !{{!\"function_entry_count\", i64 400}\n"
|
|
"!21 = !{{!\"function_entry_count\", i64 1}\n"
|
|
"!22 = !{{!\"function_entry_count\", i64 100}\n"
|
|
"!23 = !{{!\"branch_weights\", i32 64, i32 4}\n"
|
|
"{0}";
|
|
const char *SummaryString = "!llvm.module.flags = !{{!1}"
|
|
"!1 = !{{i32 1, !\"ProfileSummary\", !2}"
|
|
"!2 = !{{!3, !4, !5, !6, !7, !8, !9, !10}"
|
|
"!3 = !{{!\"ProfileFormat\", !\"{0}\"}"
|
|
"!4 = !{{!\"TotalCount\", i64 10000}"
|
|
"!5 = !{{!\"MaxCount\", i64 10}"
|
|
"!6 = !{{!\"MaxInternalCount\", i64 1}"
|
|
"!7 = !{{!\"MaxFunctionCount\", i64 1000}"
|
|
"!8 = !{{!\"NumCounts\", i64 3}"
|
|
"!9 = !{{!\"NumFunctions\", i64 3}"
|
|
"!10 = !{{!\"DetailedSummary\", !11}"
|
|
"!11 = !{{!12, !13, !14}"
|
|
"!12 = !{{i32 10000, i64 1000, i32 1}"
|
|
"!13 = !{{i32 999000, i64 300, i32 3}"
|
|
"!14 = !{{i32 999999, i64 5, i32 10}";
|
|
SMDiagnostic Err;
|
|
if (ProfKind)
|
|
return parseAssemblyString(
|
|
formatv(ModuleString, formatv(SummaryString, ProfKind).str()).str(),
|
|
Err, C);
|
|
else
|
|
return parseAssemblyString(formatv(ModuleString, "").str(), Err, C);
|
|
}
|
|
};
|
|
|
|
TEST_F(ProfileSummaryInfoTest, TestNoProfile) {
|
|
auto M = makeLLVMModule(/*ProfKind=*/nullptr);
|
|
Function *F = M->getFunction("f");
|
|
|
|
ProfileSummaryInfo PSI = buildPSI(M.get());
|
|
EXPECT_FALSE(PSI.hasProfileSummary());
|
|
EXPECT_FALSE(PSI.hasSampleProfile());
|
|
EXPECT_FALSE(PSI.hasInstrumentationProfile());
|
|
// In the absence of profiles, is{Hot|Cold}X methods should always return
|
|
// false.
|
|
EXPECT_FALSE(PSI.isHotCount(1000));
|
|
EXPECT_FALSE(PSI.isHotCount(0));
|
|
EXPECT_FALSE(PSI.isColdCount(1000));
|
|
EXPECT_FALSE(PSI.isColdCount(0));
|
|
|
|
EXPECT_FALSE(PSI.isFunctionEntryHot(F));
|
|
EXPECT_FALSE(PSI.isFunctionEntryCold(F));
|
|
|
|
BasicBlock &BB0 = F->getEntryBlock();
|
|
BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
|
|
|
|
BlockFrequencyInfo BFI = buildBFI(*F);
|
|
EXPECT_FALSE(PSI.isHotBB(&BB0, &BFI));
|
|
EXPECT_FALSE(PSI.isColdBB(&BB0, &BFI));
|
|
|
|
CallSite CS1(BB1->getFirstNonPHI());
|
|
EXPECT_FALSE(PSI.isHotCallSite(CS1, &BFI));
|
|
EXPECT_FALSE(PSI.isColdCallSite(CS1, &BFI));
|
|
}
|
|
TEST_F(ProfileSummaryInfoTest, TestCommon) {
|
|
auto M = makeLLVMModule("InstrProf");
|
|
Function *F = M->getFunction("f");
|
|
Function *G = M->getFunction("g");
|
|
Function *H = M->getFunction("h");
|
|
|
|
ProfileSummaryInfo PSI = buildPSI(M.get());
|
|
EXPECT_TRUE(PSI.hasProfileSummary());
|
|
EXPECT_TRUE(PSI.isHotCount(400));
|
|
EXPECT_TRUE(PSI.isColdCount(2));
|
|
EXPECT_FALSE(PSI.isColdCount(100));
|
|
EXPECT_FALSE(PSI.isHotCount(100));
|
|
|
|
EXPECT_TRUE(PSI.isFunctionEntryHot(F));
|
|
EXPECT_FALSE(PSI.isFunctionEntryHot(G));
|
|
EXPECT_FALSE(PSI.isFunctionEntryHot(H));
|
|
}
|
|
|
|
TEST_F(ProfileSummaryInfoTest, InstrProf) {
|
|
auto M = makeLLVMModule("InstrProf");
|
|
Function *F = M->getFunction("f");
|
|
ProfileSummaryInfo PSI = buildPSI(M.get());
|
|
EXPECT_TRUE(PSI.hasProfileSummary());
|
|
EXPECT_TRUE(PSI.hasInstrumentationProfile());
|
|
|
|
BasicBlock &BB0 = F->getEntryBlock();
|
|
BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
|
|
BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
|
|
BasicBlock *BB3 = BB1->getSingleSuccessor();
|
|
|
|
BlockFrequencyInfo BFI = buildBFI(*F);
|
|
EXPECT_TRUE(PSI.isHotBB(&BB0, &BFI));
|
|
EXPECT_TRUE(PSI.isHotBB(BB1, &BFI));
|
|
EXPECT_FALSE(PSI.isHotBB(BB2, &BFI));
|
|
EXPECT_TRUE(PSI.isHotBB(BB3, &BFI));
|
|
|
|
CallSite CS1(BB1->getFirstNonPHI());
|
|
auto *CI2 = BB2->getFirstNonPHI();
|
|
CallSite CS2(CI2);
|
|
|
|
EXPECT_TRUE(PSI.isHotCallSite(CS1, &BFI));
|
|
EXPECT_FALSE(PSI.isHotCallSite(CS2, &BFI));
|
|
|
|
// Test that adding an MD_prof metadata with a hot count on CS2 does not
|
|
// change its hotness as it has no effect in instrumented profiling.
|
|
MDBuilder MDB(M->getContext());
|
|
CI2->setMetadata(llvm::LLVMContext::MD_prof, MDB.createBranchWeights({400}));
|
|
EXPECT_FALSE(PSI.isHotCallSite(CS2, &BFI));
|
|
}
|
|
|
|
TEST_F(ProfileSummaryInfoTest, SampleProf) {
|
|
auto M = makeLLVMModule("SampleProfile");
|
|
Function *F = M->getFunction("f");
|
|
ProfileSummaryInfo PSI = buildPSI(M.get());
|
|
EXPECT_TRUE(PSI.hasProfileSummary());
|
|
EXPECT_TRUE(PSI.hasSampleProfile());
|
|
|
|
BasicBlock &BB0 = F->getEntryBlock();
|
|
BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
|
|
BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
|
|
BasicBlock *BB3 = BB1->getSingleSuccessor();
|
|
|
|
BlockFrequencyInfo BFI = buildBFI(*F);
|
|
EXPECT_TRUE(PSI.isHotBB(&BB0, &BFI));
|
|
EXPECT_TRUE(PSI.isHotBB(BB1, &BFI));
|
|
EXPECT_FALSE(PSI.isHotBB(BB2, &BFI));
|
|
EXPECT_TRUE(PSI.isHotBB(BB3, &BFI));
|
|
|
|
CallSite CS1(BB1->getFirstNonPHI());
|
|
auto *CI2 = BB2->getFirstNonPHI();
|
|
// Manually attach branch weights metadata to the call instruction.
|
|
SmallVector<uint32_t, 1> Weights;
|
|
Weights.push_back(1000);
|
|
MDBuilder MDB(M->getContext());
|
|
CI2->setMetadata(LLVMContext::MD_prof, MDB.createBranchWeights(Weights));
|
|
CallSite CS2(CI2);
|
|
|
|
EXPECT_FALSE(PSI.isHotCallSite(CS1, &BFI));
|
|
EXPECT_TRUE(PSI.isHotCallSite(CS2, &BFI));
|
|
|
|
// Test that CS2 is considered hot when it gets an MD_prof metadata with
|
|
// weights that exceed the hot count threshold.
|
|
CI2->setMetadata(llvm::LLVMContext::MD_prof, MDB.createBranchWeights({400}));
|
|
EXPECT_TRUE(PSI.isHotCallSite(CS2, &BFI));
|
|
}
|
|
|
|
} // end anonymous namespace
|
|
} // end namespace llvm
|