forked from OSchip/llvm-project
93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
//===- unittests/Analysis/CFGTest.cpp - CFG tests -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/Analysis/CFG.h"
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#include "clang/Tooling/Tooling.h"
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#include "gtest/gtest.h"
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#include <string>
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#include <vector>
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namespace clang {
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namespace analysis {
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namespace {
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enum BuildResult {
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ToolFailed,
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ToolRan,
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SawFunctionBody,
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BuiltCFG,
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};
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class CFGCallback : public ast_matchers::MatchFinder::MatchCallback {
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public:
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BuildResult TheBuildResult = ToolRan;
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void run(const ast_matchers::MatchFinder::MatchResult &Result) override {
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const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func");
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Stmt *Body = Func->getBody();
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if (!Body)
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return;
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TheBuildResult = SawFunctionBody;
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CFG::BuildOptions Options;
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Options.AddImplicitDtors = true;
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if (CFG::buildCFG(nullptr, Body, Result.Context, Options))
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TheBuildResult = BuiltCFG;
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}
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};
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BuildResult BuildCFG(const char *Code) {
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CFGCallback Callback;
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ast_matchers::MatchFinder Finder;
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Finder.addMatcher(ast_matchers::functionDecl().bind("func"), &Callback);
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std::unique_ptr<tooling::FrontendActionFactory> Factory(
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tooling::newFrontendActionFactory(&Finder));
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std::vector<std::string> Args = {"-std=c++11", "-fno-delayed-template-parsing"};
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if (!tooling::runToolOnCodeWithArgs(Factory->create(), Code, Args))
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return ToolFailed;
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return Callback.TheBuildResult;
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}
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// Constructing a CFG for a range-based for over a dependent type fails (but
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// should not crash).
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TEST(CFG, RangeBasedForOverDependentType) {
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const char *Code = "class Foo;\n"
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"template <typename T>\n"
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"void f(const T &Range) {\n"
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" for (const Foo *TheFoo : Range) {\n"
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" }\n"
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"}\n";
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EXPECT_EQ(SawFunctionBody, BuildCFG(Code));
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}
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// Constructing a CFG containing a delete expression on a dependent type should
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// not crash.
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TEST(CFG, DeleteExpressionOnDependentType) {
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const char *Code = "template<class T>\n"
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"void f(T t) {\n"
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" delete t;\n"
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"}\n";
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EXPECT_EQ(BuiltCFG, BuildCFG(Code));
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}
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// Constructing a CFG on a function template with a variable of incomplete type
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// should not crash.
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TEST(CFG, VariableOfIncompleteType) {
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const char *Code = "template<class T> void f() {\n"
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" class Undefined;\n"
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" Undefined u;\n"
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"}\n";
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EXPECT_EQ(BuiltCFG, BuildCFG(Code));
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}
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} // namespace
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} // namespace analysis
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} // namespace clang
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