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llvm-mirror/unittests/IR/ConstantsTest.cpp
David Blaikie f300e9b75c [opaque pointer type] API migration for GEP constant factories 
Require the pointee type to be passed explicitly and assert that it is
correct. For now it's possible to pass nullptr here (and I've done so in
a few places in this patch) but eventually that will be disallowed once
all clients have been updated or removed. It'll be a long road to get
all the way there... but if you have the cahnce to update your callers
to pass the type explicitly without depending on a pointer's element
type, that would be a good thing to do soon and a necessary thing to do
eventually.

llvm-svn: 233938
2015-04-02 18:55:32 +00:00

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//===- 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 "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);
#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");
}
#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
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