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[oota-llvm.git] / unittests / IR / ConstantsTest.cpp

diff --git a/unittests/IR/ConstantsTest.cpp b/unittests/IR/ConstantsTest.cpp
index fee38b891de427b05d3327a635ff245ce6b36048..0c7777d7678313e33c24042b5702b61a460e4200 100644 (file)
--- a/unittests/IR/ConstantsTest.cpp
+++ b/unittests/IR/ConstantsTest.cpp
@@ -7,12 +7,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/AsmParser/Parser.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
+#include "llvm/Support/SourceMgr.h"
 #include "gtest/gtest.h"
 
 namespace llvm {
@@ -162,7 +164,7 @@ TEST(ConstantsTest, PointerCast) {
   }
 
 TEST(ConstantsTest, AsInstructionsTest) {
-  OwningPtr<Module> M(new Module("MyModule", getGlobalContext()));
+  std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
 
   Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
   Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
@@ -246,15 +248,122 @@ TEST(ConstantsTest, AsInstructionsTest) {
   // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
   //        not a normal one!
   //CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
-  //      "getelementptr i32** @dummy, i32 1");
-  CHECK(ConstantExpr::getInBoundsGetElementPtr(Global, V),
-        "getelementptr inbounds i32** @dummy, i32 1");
+  //      "getelementptr i32*, i32** @dummy, i32 1");
+  CHECK(ConstantExpr::getInBoundsGetElementPtr(PointerType::getUnqual(Int32Ty),
+                                               Global, V),
+        "getelementptr inbounds i32*, i32** @dummy, i32 1");
 
   CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
         P6STR ", i32 1");
 }
 
+#ifdef GTEST_HAS_DEATH_TEST
+#ifndef NDEBUG
+TEST(ConstantsTest, ReplaceWithConstantTest) {
+  std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
+
+  Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
+  Constant *One = ConstantInt::get(Int32Ty, 1);
+
+  Constant *Global =
+      M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
+  Constant *GEP = ConstantExpr::getGetElementPtr(
+      PointerType::getUnqual(Int32Ty), Global, One);
+  EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
+               "this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
+}
+
+#endif
+#endif
+
 #undef CHECK
 
+TEST(ConstantsTest, ConstantArrayReplaceWithConstant) {
+  LLVMContext Context;
+  std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+  Type *IntTy = Type::getInt8Ty(Context);
+  ArrayType *ArrayTy = ArrayType::get(IntTy, 2);
+  Constant *A01Vals[2] = {ConstantInt::get(IntTy, 0),
+                          ConstantInt::get(IntTy, 1)};
+  Constant *A01 = ConstantArray::get(ArrayTy, A01Vals);
+
+  Constant *Global = new GlobalVariable(*M, IntTy, false,
+                                        GlobalValue::ExternalLinkage, nullptr);
+  Constant *GlobalInt = ConstantExpr::getPtrToInt(Global, IntTy);
+  Constant *A0GVals[2] = {ConstantInt::get(IntTy, 0), GlobalInt};
+  Constant *A0G = ConstantArray::get(ArrayTy, A0GVals);
+  ASSERT_NE(A01, A0G);
+
+  GlobalVariable *RefArray =
+      new GlobalVariable(*M, ArrayTy, false, GlobalValue::ExternalLinkage, A0G);
+  ASSERT_EQ(A0G, RefArray->getInitializer());
+
+  GlobalInt->replaceAllUsesWith(ConstantInt::get(IntTy, 1));
+  ASSERT_EQ(A01, RefArray->getInitializer());
+}
+
+TEST(ConstantsTest, ConstantExprReplaceWithConstant) {
+  LLVMContext Context;
+  std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+  Type *IntTy = Type::getInt8Ty(Context);
+  Constant *G1 = new GlobalVariable(*M, IntTy, false,
+                                    GlobalValue::ExternalLinkage, nullptr);
+  Constant *G2 = new GlobalVariable(*M, IntTy, false,
+                                    GlobalValue::ExternalLinkage, nullptr);
+  ASSERT_NE(G1, G2);
+
+  Constant *Int1 = ConstantExpr::getPtrToInt(G1, IntTy);
+  Constant *Int2 = ConstantExpr::getPtrToInt(G2, IntTy);
+  ASSERT_NE(Int1, Int2);
+
+  GlobalVariable *Ref =
+      new GlobalVariable(*M, IntTy, false, GlobalValue::ExternalLinkage, Int1);
+  ASSERT_EQ(Int1, Ref->getInitializer());
+
+  G1->replaceAllUsesWith(G2);
+  ASSERT_EQ(Int2, Ref->getInitializer());
+}
+
+TEST(ConstantsTest, GEPReplaceWithConstant) {
+  LLVMContext Context;
+  std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+  Type *IntTy = Type::getInt32Ty(Context);
+  Type *PtrTy = PointerType::get(IntTy, 0);
+  auto *C1 = ConstantInt::get(IntTy, 1);
+  auto *Placeholder = new GlobalVariable(
+      *M, IntTy, false, GlobalValue::ExternalWeakLinkage, nullptr);
+  auto *GEP = ConstantExpr::getGetElementPtr(IntTy, Placeholder, C1);
+  ASSERT_EQ(GEP->getOperand(0), Placeholder);
+
+  auto *Ref =
+      new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
+  ASSERT_EQ(GEP, Ref->getInitializer());
+
+  auto *Global = new GlobalVariable(*M, PtrTy, false,
+                                    GlobalValue::ExternalLinkage, nullptr);
+  auto *Alias = GlobalAlias::create(IntTy, 0, GlobalValue::ExternalLinkage,
+                                    "alias", Global, M.get());
+  Placeholder->replaceAllUsesWith(Alias);
+  ASSERT_EQ(GEP, Ref->getInitializer());
+  ASSERT_EQ(GEP->getOperand(0), Alias);
+}
+
+TEST(ConstantsTest, AliasCAPI) {
+  LLVMContext Context;
+  SMDiagnostic Error;
+  std::unique_ptr<Module> M =
+      parseAssemblyString("@g = global i32 42", Error, Context);
+  GlobalVariable *G = M->getGlobalVariable("g");
+  Type *I16Ty = Type::getInt16Ty(Context);
+  Type *I16PTy = PointerType::get(I16Ty, 0);
+  Constant *Aliasee = ConstantExpr::getBitCast(G, I16PTy);
+  LLVMValueRef AliasRef =
+      LLVMAddAlias(wrap(M.get()), wrap(I16PTy), wrap(Aliasee), "a");
+  ASSERT_EQ(unwrap<GlobalAlias>(AliasRef)->getAliasee(), Aliasee);
+}
+
 }  // end anonymous namespace
 }  // end namespace llvm