Use the space freed up by sparc and zaurus to import LLVM.

ok hackroom@

1 files changed, 455 insertions, 0 deletions

diff --git a/gnu/llvm/unittests/IR/ConstantsTest.cpp b/gnu/llvm/unittests/IR/ConstantsTest.cpp
new file mode 100644
index 00000000000..7471584097d
--- /dev/null
+++ b/gnu/llvm/unittests/IR/ConstantsTest.cpp
@@ -0,0 +1,455 @@
+//===- llvm/unittest/IR/ConstantsTest.cpp - Constants unit tests ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#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 "llvm-c/Core.h"
+#include "gtest/gtest.h"
+
+namespace llvm {
+namespace {
+
+TEST(ConstantsTest, Integer_i1) {
+  IntegerType* Int1 = IntegerType::get(getGlobalContext(), 1);
+  Constant* One = ConstantInt::get(Int1, 1, true);
+  Constant* Zero = ConstantInt::get(Int1, 0);
+  Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
+  EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
+  Constant* Undef = UndefValue::get(Int1);
+
+  // Input:  @b = constant i1 add(i1 1 , i1 1)
+  // Output: @b = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
+
+  // @c = constant i1 add(i1 -1, i1 1)
+  // @c = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
+
+  // @d = constant i1 add(i1 -1, i1 -1)
+  // @d = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
+
+  // @e = constant i1 sub(i1 -1, i1 1)
+  // @e = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
+
+  // @f = constant i1 sub(i1 1 , i1 -1)
+  // @f = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
+
+  // @g = constant i1 sub(i1 1 , i1 1)
+  // @g = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
+
+  // @h = constant i1 shl(i1 1 , i1 1)  ; undefined
+  // @h = constant i1 undef
+  EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
+
+  // @i = constant i1 shl(i1 1 , i1 0)
+  // @i = constant i1 true
+  EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
+
+  // @j = constant i1 lshr(i1 1, i1 1)  ; undefined
+  // @j = constant i1 undef
+  EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
+
+  // @m = constant i1 ashr(i1 1, i1 1)  ; undefined
+  // @m = constant i1 undef
+  EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
+
+  // @n = constant i1 mul(i1 -1, i1 1)
+  // @n = constant i1 true
+  EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
+
+  // @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
+  // @o = constant i1 true
+  EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
+
+  // @p = constant i1 sdiv(i1 1 , i1 -1); overflow
+  // @p = constant i1 true
+  EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
+
+  // @q = constant i1 udiv(i1 -1, i1 1)
+  // @q = constant i1 true
+  EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
+
+  // @r = constant i1 udiv(i1 1, i1 -1)
+  // @r = constant i1 true
+  EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
+
+  // @s = constant i1 srem(i1 -1, i1 1) ; overflow
+  // @s = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
+
+  // @t = constant i1 urem(i1 -1, i1 1)
+  // @t = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
+
+  // @u = constant i1 srem(i1  1, i1 -1) ; overflow
+  // @u = constant i1 false
+  EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
+}
+
+TEST(ConstantsTest, IntSigns) {
+  IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
+  EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
+  EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
+  EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
+  EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
+  EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
+  EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
+
+  // Overflow is handled by truncation.
+  EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
+}
+
+TEST(ConstantsTest, FP128Test) {
+  Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
+
+  IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
+  Constant *Zero128 = Constant::getNullValue(Int128Ty);
+  Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
+  EXPECT_TRUE(isa<ConstantFP>(X));
+}
+
+TEST(ConstantsTest, PointerCast) {
+  LLVMContext &C(getGlobalContext());
+  Type *Int8PtrTy = Type::getInt8PtrTy(C);
+  Type *Int32PtrTy = Type::getInt32PtrTy(C);
+  Type *Int64Ty = Type::getInt64Ty(C);
+  VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
+  VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
+  VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
+
+  // ptrtoint i8* to i64
+  EXPECT_EQ(Constant::getNullValue(Int64Ty),
+            ConstantExpr::getPointerCast(
+              Constant::getNullValue(Int8PtrTy), Int64Ty));
+
+  // bitcast i8* to i32*
+  EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
+            ConstantExpr::getPointerCast(
+              Constant::getNullValue(Int8PtrTy), Int32PtrTy));
+
+  // ptrtoint <4 x i8*> to <4 x i64>
+  EXPECT_EQ(Constant::getNullValue(Int64VecTy),
+            ConstantExpr::getPointerCast(
+              Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
+
+  // bitcast <4 x i8*> to <4 x i32*>
+  EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
+            ConstantExpr::getPointerCast(
+              Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
+}
+
+#define CHECK(x, y) {                                         		\
+    std::string __s;                                            	\
+    raw_string_ostream __o(__s);                                	\
+    Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction();	\
+    __I->print(__o);      						\
+    delete __I; 							\
+    __o.flush();                                                	\
+    EXPECT_EQ(std::string("  <badref> = " y), __s);             	\
+  }
+
+TEST(ConstantsTest, AsInstructionsTest) {
+  std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
+
+  Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
+  Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
+  Type *Int16Ty = Type::getInt16Ty(getGlobalContext());
+  Type *Int1Ty = Type::getInt1Ty(getGlobalContext());
+  Type *FloatTy = Type::getFloatTy(getGlobalContext());
+  Type *DoubleTy = Type::getDoubleTy(getGlobalContext());
+
+  Constant *Global = M->getOrInsertGlobal("dummy",
+                                         PointerType::getUnqual(Int32Ty));
+  Constant *Global2 = M->getOrInsertGlobal("dummy2",
+                                         PointerType::getUnqual(Int32Ty));
+
+  Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
+  Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
+  Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
+  Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
+  Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
+  Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
+  Constant *P6 = ConstantExpr::getBitCast(P4, VectorType::get(Int16Ty, 2));
+
+  Constant *One = ConstantInt::get(Int32Ty, 1);
+  Constant *Two = ConstantInt::get(Int64Ty, 2);
+  Constant *Big = ConstantInt::get(getGlobalContext(),
+                                   APInt{256, uint64_t(-1), true});
+  Constant *Elt = ConstantInt::get(Int16Ty, 2015);
+  Constant *Undef16  = UndefValue::get(Int16Ty);
+  Constant *Undef64  = UndefValue::get(Int64Ty);
+  Constant *UndefV16 = UndefValue::get(P6->getType());
+
+  #define P0STR "ptrtoint (i32** @dummy to i32)"
+  #define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
+  #define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
+  #define P3STR "ptrtoint (i32** @dummy to i1)"
+  #define P4STR "ptrtoint (i32** @dummy2 to i32)"
+  #define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
+  #define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
+
+  CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
+  CHECK(ConstantExpr::getFNeg(P1), "fsub float -0.000000e+00, " P1STR);
+  CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
+  CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
+        P0STR);
+  CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
+        P0STR);
+  CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
+  CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
+  CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
+  CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
+  CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
+  CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
+        P0STR);
+  CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
+  CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
+
+  CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
+  CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
+  CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
+        " to float");
+  CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
+        " to double");
+
+  CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
+
+  CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
+        ", i32 " P4STR);
+  CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
+        ", " P4STR);
+  CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
+        P1STR ", " P5STR);
+
+  std::vector<Constant*> V;
+  V.push_back(One);
+  // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
+  //        not a normal one!
+  //CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
+  //      "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");
+
+  EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Two));
+  EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Big));
+  EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Undef64));
+
+  EXPECT_EQ(Elt, ConstantExpr::getExtractElement(
+                 ConstantExpr::getInsertElement(P6, Elt, One), One));
+  EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Two));
+  EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Big));
+  EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Undef64));
+}
+
+#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);
+}
+
+static std::string getNameOfType(Type *T) {
+  std::string S;
+  raw_string_ostream RSOS(S);
+  T->print(RSOS);
+  return S;
+}
+
+TEST(ConstantsTest, BuildConstantDataArrays) {
+  LLVMContext Context;
+  std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+  for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
+                  Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
+    ArrayType *ArrayTy = ArrayType::get(T, 2);
+    Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
+    Constant *CDV = ConstantArray::get(ArrayTy, Vals);
+    ASSERT_TRUE(dyn_cast<ConstantDataArray>(CDV) != nullptr)
+        << " T = " << getNameOfType(T);
+  }
+
+  for (Type *T : {Type::getHalfTy(Context), Type::getFloatTy(Context),
+                  Type::getDoubleTy(Context)}) {
+    ArrayType *ArrayTy = ArrayType::get(T, 2);
+    Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
+    Constant *CDV = ConstantArray::get(ArrayTy, Vals);
+    ASSERT_TRUE(dyn_cast<ConstantDataArray>(CDV) != nullptr)
+        << " T = " << getNameOfType(T);
+  }
+}
+
+TEST(ConstantsTest, BuildConstantDataVectors) {
+  LLVMContext Context;
+  std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+  for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
+                  Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
+    Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
+    Constant *CDV = ConstantVector::get(Vals);
+    ASSERT_TRUE(dyn_cast<ConstantDataVector>(CDV) != nullptr)
+        << " T = " << getNameOfType(T);
+  }
+
+  for (Type *T : {Type::getHalfTy(Context), Type::getFloatTy(Context),
+                  Type::getDoubleTy(Context)}) {
+    Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
+    Constant *CDV = ConstantVector::get(Vals);
+    ASSERT_TRUE(dyn_cast<ConstantDataVector>(CDV) != nullptr)
+        << " T = " << getNameOfType(T);
+  }
+}
+
+TEST(ConstantsTest, BitcastToGEP) {
+  LLVMContext Context;
+  std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+  auto *i32 = Type::getInt32Ty(Context);
+  auto *U = StructType::create(Context, "Unsized");
+  Type *EltTys[] = {i32, U};
+  auto *S = StructType::create(EltTys);
+
+  auto *G = new GlobalVariable(*M, S, false,
+                               GlobalValue::ExternalLinkage, nullptr);
+  auto *PtrTy = PointerType::get(i32, 0);
+  auto *C = ConstantExpr::getBitCast(G, PtrTy);
+  ASSERT_EQ(dyn_cast<ConstantExpr>(C)->getOpcode(),
+            Instruction::BitCast);
+}
+
+}  // end anonymous namespace
+}  // end namespace llvm