| //===- 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 |