Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/unittests/IR/VerifierTest.cpp

@@ -0,0 +1,194 @@
+//===- llvm/unittest/IR/VerifierTest.cpp - Verifier unit tests --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/Verifier.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DIBuilder.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "gtest/gtest.h"
+
+namespace llvm {
+namespace {
+
+TEST(VerifierTest, Branch_i1) {
+  LLVMContext C;
+  Module M("M", C);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
+  Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
+  BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
+  BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
+  ReturnInst::Create(C, Exit);
+
+  // To avoid triggering an assertion in BranchInst::Create, we first create
+  // a branch with an 'i1' condition ...
+
+  Constant *False = ConstantInt::getFalse(C);
+  BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
+
+  // ... then use setOperand to redirect it to a value of different type.
+
+  Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
+  BI->setOperand(0, Zero32);
+
+  EXPECT_TRUE(verifyFunction(*F));
+}
+
+TEST(VerifierTest, InvalidRetAttribute) {
+  LLVMContext C;
+  Module M("M", C);
+  FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
+  Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
+  AttributeList AS = F->getAttributes();
+  F->setAttributes(
+      AS.addAttribute(C, AttributeList::ReturnIndex, Attribute::UWTable));
+
+  std::string Error;
+  raw_string_ostream ErrorOS(Error);
+  EXPECT_TRUE(verifyModule(M, &ErrorOS));
+  EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
+      "Attribute 'uwtable' only applies to functions!"));
+}
+
+TEST(VerifierTest, CrossModuleRef) {
+  LLVMContext C;
+  Module M1("M1", C);
+  Module M2("M2", C);
+  Module M3("M3", C);
+  FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
+  Function *F1 = cast<Function>(M1.getOrInsertFunction("foo1", FTy));
+  Function *F2 = cast<Function>(M2.getOrInsertFunction("foo2", FTy));
+  Function *F3 = cast<Function>(M3.getOrInsertFunction("foo3", FTy));
+
+  BasicBlock *Entry1 = BasicBlock::Create(C, "entry", F1);
+  BasicBlock *Entry3 = BasicBlock::Create(C, "entry", F3);
+
+  // BAD: Referencing function in another module
+  CallInst::Create(F2,"call",Entry1);
+
+  // BAD: Referencing personality routine in another module
+  F3->setPersonalityFn(F2);
+
+  // Fill in the body
+  Constant *ConstZero = ConstantInt::get(Type::getInt32Ty(C), 0);
+  ReturnInst::Create(C, ConstZero, Entry1);
+  ReturnInst::Create(C, ConstZero, Entry3);
+
+  std::string Error;
+  raw_string_ostream ErrorOS(Error);
+  EXPECT_TRUE(verifyModule(M2, &ErrorOS));
+  EXPECT_TRUE(StringRef(ErrorOS.str())
+                  .equals("Global is used by function in a different module\n"
+                          "i32 ()* @foo2\n"
+                          "; ModuleID = 'M2'\n"
+                          "i32 ()* @foo3\n"
+                          "; ModuleID = 'M3'\n"
+                          "Global is referenced in a different module!\n"
+                          "i32 ()* @foo2\n"
+                          "; ModuleID = 'M2'\n"
+                          "  %call = call i32 @foo2()\n"
+                          "i32 ()* @foo1\n"
+                          "; ModuleID = 'M1'\n"));
+
+  Error.clear();
+  EXPECT_TRUE(verifyModule(M1, &ErrorOS));
+  EXPECT_TRUE(StringRef(ErrorOS.str()).equals(
+      "Referencing function in another module!\n"
+      "  %call = call i32 @foo2()\n"
+      "; ModuleID = 'M1'\n"
+      "i32 ()* @foo2\n"
+      "; ModuleID = 'M2'\n"));
+
+  Error.clear();
+  EXPECT_TRUE(verifyModule(M3, &ErrorOS));
+  EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
+      "Referencing personality function in another module!"));
+
+  // Erase bad methods to avoid triggering an assertion failure on destruction
+  F1->eraseFromParent();
+  F3->eraseFromParent();
+}
+
+TEST(VerifierTest, InvalidVariableLinkage) {
+  LLVMContext C;
+  Module M("M", C);
+  new GlobalVariable(M, Type::getInt8Ty(C), false,
+                     GlobalValue::LinkOnceODRLinkage, nullptr, "Some Global");
+  std::string Error;
+  raw_string_ostream ErrorOS(Error);
+  EXPECT_TRUE(verifyModule(M, &ErrorOS));
+  EXPECT_TRUE(
+      StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
+                                          "have external or weak linkage!"));
+}
+
+TEST(VerifierTest, InvalidFunctionLinkage) {
+  LLVMContext C;
+  Module M("M", C);
+
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
+  Function::Create(FTy, GlobalValue::LinkOnceODRLinkage, "foo", &M);
+  std::string Error;
+  raw_string_ostream ErrorOS(Error);
+  EXPECT_TRUE(verifyModule(M, &ErrorOS));
+  EXPECT_TRUE(
+      StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
+                                          "have external or weak linkage!"));
+}
+
+TEST(VerifierTest, DetectInvalidDebugInfo) {
+  {
+    LLVMContext C;
+    Module M("M", C);
+    DIBuilder DIB(M);
+    DIB.createCompileUnit(dwarf::DW_LANG_C89, DIB.createFile("broken.c", "/"),
+                          "unittest", false, "", 0);
+    DIB.finalize();
+    EXPECT_FALSE(verifyModule(M));
+
+    // Now break it by inserting non-CU node to the list of CUs.
+    auto *File = DIB.createFile("not-a-CU.f", ".");
+    NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
+    NMD->addOperand(File);
+    EXPECT_TRUE(verifyModule(M));
+  }
+  {
+    LLVMContext C;
+    Module M("M", C);
+    DIBuilder DIB(M);
+    auto *CU = DIB.createCompileUnit(dwarf::DW_LANG_C89,
+                                     DIB.createFile("broken.c", "/"),
+                                     "unittest", false, "", 0);
+    new GlobalVariable(M, Type::getInt8Ty(C), false,
+                       GlobalValue::ExternalLinkage, nullptr, "g");
+
+    auto *F = cast<Function>(M.getOrInsertFunction(
+        "f", FunctionType::get(Type::getVoidTy(C), false)));
+    IRBuilder<> Builder(BasicBlock::Create(C, "", F));
+    Builder.CreateUnreachable();
+    F->setSubprogram(DIB.createFunction(CU, "f", "f",
+                                        DIB.createFile("broken.c", "/"), 1,
+                                        nullptr, true, true, 1));
+    DIB.finalize();
+    EXPECT_FALSE(verifyModule(M));
+
+    // Now break it by not listing the CU at all.
+    M.eraseNamedMetadata(M.getOrInsertNamedMetadata("llvm.dbg.cu"));
+    EXPECT_TRUE(verifyModule(M));
+  }
+}
+
+} // end anonymous namespace
+} // end namespace llvm