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Diffstat (limited to 'gnu/llvm/unittests/IR/ConstantsTest.cpp')
| -rw-r--r-- | gnu/llvm/unittests/IR/ConstantsTest.cpp | 455 |
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 |