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//===- FunctionPropertiesAnalysisTest.cpp - Function Properties Unit Tests-===//
//
// 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/FunctionPropertiesAnalysis.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
class FunctionPropertiesAnalysisTest : public testing::Test {
protected:
std::unique_ptr<DominatorTree> DT;
std::unique_ptr<LoopInfo> LI;
FunctionPropertiesInfo buildFPI(Function &F) {
DT.reset(new DominatorTree(F));
LI.reset(new LoopInfo(*DT));
return FunctionPropertiesInfo::getFunctionPropertiesInfo(F, *LI);
}
std::unique_ptr<Module> makeLLVMModule(LLVMContext &C, const char *IR) {
SMDiagnostic Err;
std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
if (!Mod)
Err.print("MLAnalysisTests", errs());
return Mod;
}
};
TEST_F(FunctionPropertiesAnalysisTest, BasicTest) {
LLVMContext C;
std::unique_ptr<Module> M = makeLLVMModule(C,
R"IR(
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
declare i32 @f1(i32)
declare i32 @f2(i32)
define i32 @branches(i32) {
%cond = icmp slt i32 %0, 3
br i1 %cond, label %then, label %else
then:
%ret.1 = call i32 @f1(i32 %0)
br label %last.block
else:
%ret.2 = call i32 @f2(i32 %0)
br label %last.block
last.block:
%ret = phi i32 [%ret.1, %then], [%ret.2, %else]
ret i32 %ret
}
define internal i32 @top() {
%1 = call i32 @branches(i32 2)
%2 = call i32 @f1(i32 %1)
ret i32 %2
}
)IR");
Function *BranchesFunction = M->getFunction("branches");
FunctionPropertiesInfo BranchesFeatures = buildFPI(*BranchesFunction);
EXPECT_EQ(BranchesFeatures.BasicBlockCount, 4);
EXPECT_EQ(BranchesFeatures.BlocksReachedFromConditionalInstruction, 2);
// 2 Users: top is one. The other is added because @branches is not internal,
// so it may have external callers.
EXPECT_EQ(BranchesFeatures.Uses, 2);
EXPECT_EQ(BranchesFeatures.DirectCallsToDefinedFunctions, 0);
EXPECT_EQ(BranchesFeatures.LoadInstCount, 0);
EXPECT_EQ(BranchesFeatures.StoreInstCount, 0);
EXPECT_EQ(BranchesFeatures.MaxLoopDepth, 0);
EXPECT_EQ(BranchesFeatures.TopLevelLoopCount, 0);
Function *TopFunction = M->getFunction("top");
FunctionPropertiesInfo TopFeatures = buildFPI(*TopFunction);
EXPECT_EQ(TopFeatures.BasicBlockCount, 1);
EXPECT_EQ(TopFeatures.BlocksReachedFromConditionalInstruction, 0);
EXPECT_EQ(TopFeatures.Uses, 0);
EXPECT_EQ(TopFeatures.DirectCallsToDefinedFunctions, 1);
EXPECT_EQ(BranchesFeatures.LoadInstCount, 0);
EXPECT_EQ(BranchesFeatures.StoreInstCount, 0);
EXPECT_EQ(BranchesFeatures.MaxLoopDepth, 0);
EXPECT_EQ(BranchesFeatures.TopLevelLoopCount, 0);
}
} // end anonymous namespace
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