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//===- GraphWriterTest.cpp - GraphWriter 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/Support/GraphWriter.h"
#include "llvm/Analysis/CFGPrinter.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Testing/Support/SupportHelpers.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.h"
#include <string>
#define ASSERT_NO_ERROR(x) \
if (std::error_code ASSERT_NO_ERROR_ec = x) { \
SmallString<128> MessageStorage; \
raw_svector_ostream Message(MessageStorage); \
Message << #x ": did not return errc::success.\n" \
<< "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
<< "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
GTEST_FATAL_FAILURE_(MessageStorage.c_str()); \
} else { \
}
namespace llvm {
namespace {
class GraphWriterTest : public testing::Test {
protected:
LLVMContext C;
std::unique_ptr<Module> makeLLVMModule() {
const char *ModuleStrig = "define i32 @f(i32 %x) {\n"
"bb0:\n"
" %y1 = icmp eq i32 %x, 0 \n"
" br i1 %y1, label %bb1, label %bb2 \n"
"bb1:\n"
" br label %bb3\n"
"bb2:\n"
" br label %bb3\n"
"bb3:\n"
" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
" ret i32 %y2\n"
"}\n";
SMDiagnostic Err;
return parseAssemblyString(ModuleStrig, Err, C);
}
};
static void writeCFGToDotFile(Function &F, std::string Name,
bool CFGOnly = false) {
std::error_code EC;
llvm::unittest::TempDir Tmp("tmpdir", /*Unique=*/true);
SmallString<128> FileName(Tmp.path().begin(), Tmp.path().end());
sys::path::append(FileName, Name + ".dot");
raw_fd_ostream File(FileName, EC, sys::fs::OpenFlags::OF_Text);
DOTFuncInfo CFGInfo(&F);
ASSERT_NO_ERROR(EC);
// Test intentionally does not pass BPI, WriteGraph should work without it.
WriteGraph(File, &CFGInfo, CFGOnly);
}
TEST_F(GraphWriterTest, WriteCFGDotFileTest) {
auto M = makeLLVMModule();
Function *F = M->getFunction("f");
writeCFGToDotFile(*F, "test-full");
writeCFGToDotFile(*F, "test-cfg-only", true);
}
} // end anonymous namespace
} // end namespace llvm
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