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//===--- CtxProfAnalysisTest.cpp ------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/CtxProfAnalysis.h"
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/CGSCCPassManager.h"
#include "llvm/Analysis/LoopAnalysisManager.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Analysis.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/PassInstrumentation.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
class CtxProfAnalysisTest : public testing::Test {
static constexpr auto *IR = R"IR(
declare void @bar()
define private void @foo(i32 %a, ptr %fct) #0 !guid !0 {
%t = icmp eq i32 %a, 0
br i1 %t, label %yes, label %no
yes:
call void %fct(i32 %a)
br label %exit
no:
call void @bar()
br label %exit
exit:
ret void
}
define void @an_entrypoint(i32 %a) {
%t = icmp eq i32 %a, 0
br i1 %t, label %yes, label %no
yes:
call void @foo(i32 1, ptr null)
ret void
no:
ret void
}
define void @another_entrypoint_no_callees(i32 %a) {
%t = icmp eq i32 %a, 0
br i1 %t, label %yes, label %no
yes:
ret void
no:
ret void
}
define void @inlineasm() {
call void asm "nop", ""()
ret void
}
attributes #0 = { noinline }
!0 = !{ i64 11872291593386833696 }
)IR";
protected:
LLVMContext C;
PassBuilder PB;
ModuleAnalysisManager MAM;
FunctionAnalysisManager FAM;
CGSCCAnalysisManager CGAM;
LoopAnalysisManager LAM;
std::unique_ptr<Module> M;
void SetUp() override {
SMDiagnostic Err;
M = parseAssemblyString(IR, Err, C);
ASSERT_TRUE(!!M);
}
public:
CtxProfAnalysisTest() {
PB.registerModuleAnalyses(MAM);
PB.registerCGSCCAnalyses(CGAM);
PB.registerFunctionAnalyses(FAM);
PB.registerLoopAnalyses(LAM);
PB.crossRegisterProxies(LAM, FAM, CGAM, MAM);
}
};
TEST_F(CtxProfAnalysisTest, GetCallsiteIDTest) {
ModulePassManager MPM;
MPM.addPass(PGOInstrumentationGen(PGOInstrumentationType::CTXPROF));
EXPECT_FALSE(MPM.run(*M, MAM).areAllPreserved());
auto *F = M->getFunction("foo");
ASSERT_NE(F, nullptr);
std::vector<uint32_t> InsValues;
for (auto &BB : *F)
for (auto &I : BB)
if (auto *CB = dyn_cast<CallBase>(&I)) {
// Skip instrumentation inserted intrinsics.
if (CB->getCalledFunction() && CB->getCalledFunction()->isIntrinsic())
continue;
auto *Ins = CtxProfAnalysis::getCallsiteInstrumentation(*CB);
ASSERT_NE(Ins, nullptr);
InsValues.push_back(Ins->getIndex()->getZExtValue());
}
EXPECT_THAT(InsValues, testing::ElementsAre(0, 1));
}
TEST_F(CtxProfAnalysisTest, GetCallsiteIDInlineAsmTest) {
ModulePassManager MPM;
MPM.addPass(PGOInstrumentationGen(PGOInstrumentationType::CTXPROF));
EXPECT_FALSE(MPM.run(*M, MAM).areAllPreserved());
auto *F = M->getFunction("inlineasm");
ASSERT_NE(F, nullptr);
std::vector<const Instruction *> InsValues;
for (auto &BB : *F)
for (auto &I : BB)
if (auto *CB = dyn_cast<CallBase>(&I)) {
// Skip instrumentation inserted intrinsics.
if (CB->getCalledFunction() && CB->getCalledFunction()->isIntrinsic())
continue;
auto *Ins = CtxProfAnalysis::getCallsiteInstrumentation(*CB);
InsValues.push_back(Ins);
}
EXPECT_THAT(InsValues, testing::ElementsAre(nullptr));
}
TEST_F(CtxProfAnalysisTest, GetCallsiteIDNegativeTest) {
auto *F = M->getFunction("foo");
ASSERT_NE(F, nullptr);
CallBase *FirstCall = nullptr;
for (auto &BB : *F)
for (auto &I : BB)
if (auto *CB = dyn_cast<CallBase>(&I)) {
if (CB->isIndirectCall() || !CB->getCalledFunction()->isIntrinsic()) {
FirstCall = CB;
break;
}
}
ASSERT_NE(FirstCall, nullptr);
auto *IndIns = CtxProfAnalysis::getCallsiteInstrumentation(*FirstCall);
EXPECT_EQ(IndIns, nullptr);
}
TEST_F(CtxProfAnalysisTest, GetBBIDTest) {
ModulePassManager MPM;
MPM.addPass(PGOInstrumentationGen(PGOInstrumentationType::CTXPROF));
EXPECT_FALSE(MPM.run(*M, MAM).areAllPreserved());
auto *F = M->getFunction("foo");
ASSERT_NE(F, nullptr);
std::map<std::string, int> BBNameAndID;
for (auto &BB : *F) {
auto *Ins = CtxProfAnalysis::getBBInstrumentation(BB);
if (Ins)
BBNameAndID[BB.getName().str()] =
static_cast<int>(Ins->getIndex()->getZExtValue());
else
BBNameAndID[BB.getName().str()] = -1;
}
EXPECT_THAT(BBNameAndID,
testing::UnorderedElementsAre(
testing::Pair("", 0), testing::Pair("yes", 1),
testing::Pair("no", -1), testing::Pair("exit", -1)));
}
} // namespace
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