mirror of
https://github.com/RPCS3/llvm-mirror.git
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fb601ea161
Summary: Follow up on D75283. Also remove the test code that was moved to another test and was to be removed. Reviewers: davidxl Subscribers: eraman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D75630
379 lines
15 KiB
C++
379 lines
15 KiB
C++
//===- ProfileSummaryInfoTest.cpp - ProfileSummaryInfo unit tests ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/ProfileSummaryInfo.h"
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#include "llvm/Analysis/BlockFrequencyInfo.h"
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#include "llvm/Analysis/BranchProbabilityInfo.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/CallSite.h"
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#include "llvm/IR/Dominators.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/MDBuilder.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/FormatVariadic.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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class ProfileSummaryInfoTest : public testing::Test {
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protected:
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LLVMContext C;
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std::unique_ptr<BranchProbabilityInfo> BPI;
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std::unique_ptr<DominatorTree> DT;
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std::unique_ptr<LoopInfo> LI;
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ProfileSummaryInfo buildPSI(Module *M) {
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return ProfileSummaryInfo(*M);
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}
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BlockFrequencyInfo buildBFI(Function &F) {
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DT.reset(new DominatorTree(F));
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LI.reset(new LoopInfo(*DT));
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BPI.reset(new BranchProbabilityInfo(F, *LI));
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return BlockFrequencyInfo(F, *BPI, *LI);
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}
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std::unique_ptr<Module> makeLLVMModule(const char *ProfKind = nullptr) {
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const char *ModuleString =
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"define i32 @g(i32 %x) !prof !21 {{\n"
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" ret i32 0\n"
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"}\n"
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"define i32 @h(i32 %x) !prof !22 {{\n"
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" ret i32 0\n"
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"}\n"
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"define i32 @f(i32 %x) !prof !20 {{\n"
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"bb0:\n"
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" %y1 = icmp eq i32 %x, 0 \n"
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" br i1 %y1, label %bb1, label %bb2, !prof !23 \n"
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"bb1:\n"
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" %z1 = call i32 @g(i32 %x)\n"
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" br label %bb3\n"
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"bb2:\n"
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" %z2 = call i32 @h(i32 %x)\n"
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" br label %bb3\n"
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"bb3:\n"
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" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
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" ret i32 %y2\n"
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"}\n"
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"define i32 @l(i32 %x) {{\n"
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"bb0:\n"
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" %y1 = icmp eq i32 %x, 0 \n"
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" br i1 %y1, label %bb1, label %bb2, !prof !23 \n"
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"bb1:\n"
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" %z1 = call i32 @g(i32 %x)\n"
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" br label %bb3\n"
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"bb2:\n"
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" %z2 = call i32 @h(i32 %x)\n"
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" br label %bb3\n"
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"bb3:\n"
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" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
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" ret i32 %y2\n"
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"}\n"
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"!20 = !{{!\"function_entry_count\", i64 400}\n"
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"!21 = !{{!\"function_entry_count\", i64 1}\n"
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"!22 = !{{!\"function_entry_count\", i64 100}\n"
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"!23 = !{{!\"branch_weights\", i32 64, i32 4}\n"
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"{0}";
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const char *SummaryString = "!llvm.module.flags = !{{!1}"
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"!1 = !{{i32 1, !\"ProfileSummary\", !2}"
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"!2 = !{{!3, !4, !5, !6, !7, !8, !9, !10}"
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"!3 = !{{!\"ProfileFormat\", !\"{0}\"}"
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"!4 = !{{!\"TotalCount\", i64 10000}"
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"!5 = !{{!\"MaxCount\", i64 10}"
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"!6 = !{{!\"MaxInternalCount\", i64 1}"
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"!7 = !{{!\"MaxFunctionCount\", i64 1000}"
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"!8 = !{{!\"NumCounts\", i64 3}"
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"!9 = !{{!\"NumFunctions\", i64 3}"
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"!10 = !{{!\"DetailedSummary\", !11}"
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"!11 = !{{!12, !13, !14}"
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"!12 = !{{i32 10000, i64 1000, i32 1}"
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"!13 = !{{i32 999000, i64 300, i32 3}"
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"!14 = !{{i32 999999, i64 5, i32 10}";
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SMDiagnostic Err;
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if (ProfKind)
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return parseAssemblyString(
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formatv(ModuleString, formatv(SummaryString, ProfKind).str()).str(),
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Err, C);
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else
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return parseAssemblyString(formatv(ModuleString, "").str(), Err, C);
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}
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};
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TEST_F(ProfileSummaryInfoTest, TestNoProfile) {
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auto M = makeLLVMModule(/*ProfKind=*/nullptr);
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Function *F = M->getFunction("f");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_FALSE(PSI.hasProfileSummary());
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EXPECT_FALSE(PSI.hasSampleProfile());
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EXPECT_FALSE(PSI.hasInstrumentationProfile());
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// In the absence of profiles, is{Hot|Cold}X methods should always return
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// false.
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EXPECT_FALSE(PSI.isHotCount(1000));
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EXPECT_FALSE(PSI.isHotCount(0));
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EXPECT_FALSE(PSI.isColdCount(1000));
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EXPECT_FALSE(PSI.isColdCount(0));
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EXPECT_FALSE(PSI.isFunctionEntryHot(F));
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EXPECT_FALSE(PSI.isFunctionEntryCold(F));
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BlockFrequencyInfo BFI = buildBFI(*F);
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EXPECT_FALSE(PSI.isHotBlock(&BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlock(&BB0, &BFI));
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CallSite CS1(BB1->getFirstNonPHI());
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EXPECT_FALSE(PSI.isHotCallSite(CS1, &BFI));
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EXPECT_FALSE(PSI.isColdCallSite(CS1, &BFI));
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}
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TEST_F(ProfileSummaryInfoTest, TestCommon) {
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auto M = makeLLVMModule("InstrProf");
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Function *F = M->getFunction("f");
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Function *G = M->getFunction("g");
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Function *H = M->getFunction("h");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.isHotCount(400));
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EXPECT_TRUE(PSI.isColdCount(2));
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EXPECT_FALSE(PSI.isColdCount(100));
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EXPECT_FALSE(PSI.isHotCount(100));
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EXPECT_TRUE(PSI.isHotCountNthPercentile(990000, 400));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(990000, 100));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(990000, 2));
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EXPECT_FALSE(PSI.isColdCountNthPercentile(990000, 400));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(990000, 100));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(990000, 2));
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EXPECT_TRUE(PSI.isHotCountNthPercentile(999999, 400));
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EXPECT_TRUE(PSI.isHotCountNthPercentile(999999, 100));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(999999, 2));
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EXPECT_FALSE(PSI.isColdCountNthPercentile(999999, 400));
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EXPECT_FALSE(PSI.isColdCountNthPercentile(999999, 100));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(999999, 2));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(10000, 400));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(10000, 100));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(10000, 2));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(10000, 400));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(10000, 100));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(10000, 2));
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EXPECT_TRUE(PSI.isFunctionEntryHot(F));
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EXPECT_FALSE(PSI.isFunctionEntryHot(G));
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EXPECT_FALSE(PSI.isFunctionEntryHot(H));
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}
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TEST_F(ProfileSummaryInfoTest, InstrProf) {
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auto M = makeLLVMModule("InstrProf");
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Function *F = M->getFunction("f");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.hasInstrumentationProfile());
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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BlockFrequencyInfo BFI = buildBFI(*F);
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EXPECT_TRUE(PSI.isHotBlock(&BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlock(BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlock(BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlock(BB3, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB3, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB3, &BFI));
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CallSite CS1(BB1->getFirstNonPHI());
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auto *CI2 = BB2->getFirstNonPHI();
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CallSite CS2(CI2);
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EXPECT_TRUE(PSI.isHotCallSite(CS1, &BFI));
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EXPECT_FALSE(PSI.isHotCallSite(CS2, &BFI));
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// Test that adding an MD_prof metadata with a hot count on CS2 does not
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// change its hotness as it has no effect in instrumented profiling.
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MDBuilder MDB(M->getContext());
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CI2->setMetadata(llvm::LLVMContext::MD_prof, MDB.createBranchWeights({400}));
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EXPECT_FALSE(PSI.isHotCallSite(CS2, &BFI));
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EXPECT_TRUE(PSI.isFunctionHotInCallGraphNthPercentile(990000, F, BFI));
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EXPECT_FALSE(PSI.isFunctionColdInCallGraphNthPercentile(990000, F, BFI));
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EXPECT_FALSE(PSI.isFunctionHotInCallGraphNthPercentile(10000, F, BFI));
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EXPECT_TRUE(PSI.isFunctionColdInCallGraphNthPercentile(10000, F, BFI));
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}
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TEST_F(ProfileSummaryInfoTest, InstrProfNoFuncEntryCount) {
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auto M = makeLLVMModule("InstrProf");
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Function *F = M->getFunction("l");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.hasInstrumentationProfile());
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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BlockFrequencyInfo BFI = buildBFI(*F);
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// Without the entry count, all should return false.
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isFunctionHotInCallGraphNthPercentile(990000, F, BFI));
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EXPECT_FALSE(PSI.isFunctionColdInCallGraphNthPercentile(990000, F, BFI));
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}
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TEST_F(ProfileSummaryInfoTest, SampleProf) {
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auto M = makeLLVMModule("SampleProfile");
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Function *F = M->getFunction("f");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.hasSampleProfile());
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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BlockFrequencyInfo BFI = buildBFI(*F);
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EXPECT_TRUE(PSI.isHotBlock(&BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlock(BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlock(BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlock(BB3, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB3, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB3, &BFI));
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CallSite CS1(BB1->getFirstNonPHI());
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auto *CI2 = BB2->getFirstNonPHI();
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// Manually attach branch weights metadata to the call instruction.
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SmallVector<uint32_t, 1> Weights;
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Weights.push_back(1000);
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MDBuilder MDB(M->getContext());
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CI2->setMetadata(LLVMContext::MD_prof, MDB.createBranchWeights(Weights));
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CallSite CS2(CI2);
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EXPECT_FALSE(PSI.isHotCallSite(CS1, &BFI));
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EXPECT_TRUE(PSI.isHotCallSite(CS2, &BFI));
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// Test that CS2 is considered hot when it gets an MD_prof metadata with
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// weights that exceed the hot count threshold.
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CI2->setMetadata(llvm::LLVMContext::MD_prof, MDB.createBranchWeights({400}));
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EXPECT_TRUE(PSI.isHotCallSite(CS2, &BFI));
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EXPECT_TRUE(PSI.isFunctionHotInCallGraphNthPercentile(990000, F, BFI));
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EXPECT_FALSE(PSI.isFunctionColdInCallGraphNthPercentile(990000, F, BFI));
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EXPECT_FALSE(PSI.isFunctionHotInCallGraphNthPercentile(10000, F, BFI));
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EXPECT_TRUE(PSI.isFunctionColdInCallGraphNthPercentile(10000, F, BFI));
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}
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TEST_F(ProfileSummaryInfoTest, SampleProfNoFuncEntryCount) {
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auto M = makeLLVMModule("SampleProfile");
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Function *F = M->getFunction("l");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.hasSampleProfile());
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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BlockFrequencyInfo BFI = buildBFI(*F);
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// Without the entry count, all should return false.
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isFunctionHotInCallGraphNthPercentile(990000, F, BFI));
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EXPECT_FALSE(PSI.isFunctionColdInCallGraphNthPercentile(990000, F, BFI));
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}
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} // end anonymous namespace
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} // end namespace llvm
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