17764d2c87
Remove support for the fptrunc, fpext, fptoui, fptosi, uitofp and sitofp constant expressions. All places creating them have been removed beforehand, so this just removes the APIs and uses of these constant expressions in tests. With this, the only remaining FP operation that still has constant expression support is fcmp. This is part of https://discourse.llvm.org/t/rfc-remove-most-constant-expressions/63179.
755 lines
28 KiB
C++
755 lines
28 KiB
C++
//===- llvm/unittest/IR/ConstantsTest.cpp - Constants unit tests ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Constants.h"
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#include "llvm-c/Core.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/ConstantFold.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/InstrTypes.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/SourceMgr.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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TEST(ConstantsTest, Integer_i1) {
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LLVMContext Context;
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IntegerType *Int1 = IntegerType::get(Context, 1);
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Constant *One = ConstantInt::get(Int1, 1, true);
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Constant *Zero = ConstantInt::get(Int1, 0);
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Constant *NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
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EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
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Constant *Poison = PoisonValue::get(Int1);
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// Input: @b = constant i1 add(i1 1 , i1 1)
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// Output: @b = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
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// @c = constant i1 add(i1 -1, i1 1)
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// @c = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
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// @d = constant i1 add(i1 -1, i1 -1)
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// @d = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
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// @e = constant i1 sub(i1 -1, i1 1)
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// @e = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
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// @f = constant i1 sub(i1 1 , i1 -1)
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// @f = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
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// @g = constant i1 sub(i1 1 , i1 1)
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// @g = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
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// @h = constant i1 shl(i1 1 , i1 1) ; poison
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// @h = constant i1 poison
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EXPECT_EQ(Poison, ConstantExpr::getShl(One, One));
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// @i = constant i1 shl(i1 1 , i1 0)
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// @i = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
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// @j = constant i1 lshr(i1 1, i1 1) ; poison
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// @j = constant i1 poison
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EXPECT_EQ(Poison, ConstantExpr::getLShr(One, One));
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// @m = constant i1 ashr(i1 1, i1 1) ; poison
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// @m = constant i1 poison
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EXPECT_EQ(Poison, ConstantExpr::getAShr(One, One));
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// @n = constant i1 mul(i1 -1, i1 1)
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// @n = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
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// @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
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// @o = constant i1 true
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EXPECT_EQ(One, ConstantFoldBinaryInstruction(Instruction::SDiv, NegOne, One));
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// @p = constant i1 sdiv(i1 1 , i1 -1); overflow
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// @p = constant i1 true
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EXPECT_EQ(One, ConstantFoldBinaryInstruction(Instruction::SDiv, One, NegOne));
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// @q = constant i1 udiv(i1 -1, i1 1)
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// @q = constant i1 true
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EXPECT_EQ(One, ConstantFoldBinaryInstruction(Instruction::UDiv, NegOne, One));
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// @r = constant i1 udiv(i1 1, i1 -1)
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// @r = constant i1 true
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EXPECT_EQ(One, ConstantFoldBinaryInstruction(Instruction::UDiv, One, NegOne));
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// @s = constant i1 srem(i1 -1, i1 1) ; overflow
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// @s = constant i1 false
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EXPECT_EQ(Zero,
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ConstantFoldBinaryInstruction(Instruction::SRem, NegOne, One));
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// @u = constant i1 srem(i1 1, i1 -1) ; overflow
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// @u = constant i1 false
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EXPECT_EQ(Zero,
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ConstantFoldBinaryInstruction(Instruction::SRem, One, NegOne));
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}
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TEST(ConstantsTest, IntSigns) {
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LLVMContext Context;
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IntegerType *Int8Ty = Type::getInt8Ty(Context);
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EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
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EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
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EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
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EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
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EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
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EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
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// Overflow is handled by truncation.
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EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
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}
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TEST(ConstantsTest, PointerCast) {
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LLVMContext C;
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Type *PtrTy = PointerType::get(C, 0);
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Type *Int64Ty = Type::getInt64Ty(C);
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VectorType *PtrVecTy = FixedVectorType::get(PtrTy, 4);
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VectorType *Int64VecTy = FixedVectorType::get(Int64Ty, 4);
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VectorType *PtrScalableVecTy = ScalableVectorType::get(PtrTy, 4);
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VectorType *Int64ScalableVecTy = ScalableVectorType::get(Int64Ty, 4);
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// ptrtoint ptr to i64
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EXPECT_EQ(
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Constant::getNullValue(Int64Ty),
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ConstantExpr::getPointerCast(Constant::getNullValue(PtrTy), Int64Ty));
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// bitcast ptr to ptr
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EXPECT_EQ(Constant::getNullValue(PtrTy),
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ConstantExpr::getPointerCast(Constant::getNullValue(PtrTy), PtrTy));
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// ptrtoint <4 x ptr> to <4 x i64>
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EXPECT_EQ(Constant::getNullValue(Int64VecTy),
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ConstantExpr::getPointerCast(Constant::getNullValue(PtrVecTy),
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Int64VecTy));
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// ptrtoint <vscale x 4 x ptr> to <vscale x 4 x i64>
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EXPECT_EQ(Constant::getNullValue(Int64ScalableVecTy),
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ConstantExpr::getPointerCast(
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Constant::getNullValue(PtrScalableVecTy), Int64ScalableVecTy));
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// bitcast <4 x ptr> to <4 x ptr>
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EXPECT_EQ(
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Constant::getNullValue(PtrVecTy),
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ConstantExpr::getPointerCast(Constant::getNullValue(PtrVecTy), PtrVecTy));
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// bitcast <vscale x 4 x ptr> to <vscale x 4 x ptr>
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EXPECT_EQ(Constant::getNullValue(PtrScalableVecTy),
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ConstantExpr::getPointerCast(
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Constant::getNullValue(PtrScalableVecTy), PtrScalableVecTy));
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Type *Ptr1Ty = PointerType::get(C, 1);
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ConstantInt *K = ConstantInt::get(Type::getInt64Ty(C), 1234);
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// Make sure that addrspacecast of inttoptr is not folded away.
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EXPECT_NE(K, ConstantExpr::getAddrSpaceCast(
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ConstantExpr::getIntToPtr(K, PtrTy), Ptr1Ty));
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EXPECT_NE(K, ConstantExpr::getAddrSpaceCast(
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ConstantExpr::getIntToPtr(K, Ptr1Ty), PtrTy));
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Constant *NullPtr0 = Constant::getNullValue(PtrTy);
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Constant *NullPtr1 = Constant::getNullValue(Ptr1Ty);
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// Make sure that addrspacecast of null is not folded away.
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EXPECT_NE(Constant::getNullValue(PtrTy),
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ConstantExpr::getAddrSpaceCast(NullPtr0, Ptr1Ty));
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EXPECT_NE(Constant::getNullValue(Ptr1Ty),
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ConstantExpr::getAddrSpaceCast(NullPtr1, PtrTy));
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}
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#define CHECK(x, y) \
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{ \
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std::string __s; \
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raw_string_ostream __o(__s); \
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Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
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__I->print(__o); \
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__I->deleteValue(); \
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__o.flush(); \
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EXPECT_EQ(std::string(" <badref> = " y), __s); \
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}
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TEST(ConstantsTest, AsInstructionsTest) {
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LLVMContext Context;
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std::unique_ptr<Module> M(new Module("MyModule", Context));
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Type *Int64Ty = Type::getInt64Ty(Context);
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Type *Int32Ty = Type::getInt32Ty(Context);
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Type *Int16Ty = Type::getInt16Ty(Context);
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Constant *Global =
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M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
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Constant *Global2 =
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M->getOrInsertGlobal("dummy2", PointerType::getUnqual(Int32Ty));
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Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
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Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
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Constant *P6 = ConstantExpr::getBitCast(P4, FixedVectorType::get(Int16Ty, 2));
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Constant *One = ConstantInt::get(Int32Ty, 1);
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Constant *Two = ConstantInt::get(Int64Ty, 2);
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Constant *Big = ConstantInt::get(Context, APInt{256, uint64_t(-1), true});
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Constant *Elt = ConstantInt::get(Int16Ty, 2015);
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Constant *Poison16 = PoisonValue::get(Int16Ty);
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Constant *Undef64 = UndefValue::get(Int64Ty);
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Constant *PoisonV16 = PoisonValue::get(P6->getType());
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#define P0STR "ptrtoint (ptr @dummy to i32)"
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#define P3STR "ptrtoint (ptr @dummy to i1)"
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#define P4STR "ptrtoint (ptr @dummy2 to i32)"
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#define P6STR "bitcast (i32 ptrtoint (ptr @dummy2 to i32) to <2 x i16>)"
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CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
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CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
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CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAdd(P0, P0, false, true),
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"add nsw i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAdd(P0, P0, true, true),
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"add nuw nsw i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getShl(P0, P0, false, true),
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"shl nsw i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getLShr(P0, P0, true),
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"lshr exact i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAShr(P0, P0, true),
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"ashr exact i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4),
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"icmp eq i32 " P0STR ", " P4STR);
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std::vector<Constant *> V;
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V.push_back(One);
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// FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
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// not a normal one!
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// CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
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// "getelementptr i32*, i32** @dummy, i32 1");
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CHECK(ConstantExpr::getInBoundsGetElementPtr(PointerType::getUnqual(Int32Ty),
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Global, V),
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"getelementptr inbounds ptr, ptr @dummy, i32 1");
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CHECK(ConstantExpr::getExtractElement(P6, One),
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"extractelement <2 x i16> " P6STR ", i32 1");
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EXPECT_EQ(Poison16, ConstantExpr::getExtractElement(P6, Two));
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EXPECT_EQ(Poison16, ConstantExpr::getExtractElement(P6, Big));
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EXPECT_EQ(Poison16, ConstantExpr::getExtractElement(P6, Undef64));
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EXPECT_EQ(Elt, ConstantExpr::getExtractElement(
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ConstantExpr::getInsertElement(P6, Elt, One), One));
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EXPECT_EQ(PoisonV16, ConstantExpr::getInsertElement(P6, Elt, Two));
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EXPECT_EQ(PoisonV16, ConstantExpr::getInsertElement(P6, Elt, Big));
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EXPECT_EQ(PoisonV16, ConstantExpr::getInsertElement(P6, Elt, Undef64));
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}
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#ifdef GTEST_HAS_DEATH_TEST
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#ifndef NDEBUG
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TEST(ConstantsTest, ReplaceWithConstantTest) {
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LLVMContext Context;
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std::unique_ptr<Module> M(new Module("MyModule", Context));
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Type *Int32Ty = Type::getInt32Ty(Context);
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Constant *One = ConstantInt::get(Int32Ty, 1);
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Constant *Global =
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M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
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Constant *GEP = ConstantExpr::getGetElementPtr(
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PointerType::getUnqual(Int32Ty), Global, One);
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EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
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"this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
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}
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#endif
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#endif
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#undef CHECK
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TEST(ConstantsTest, ConstantArrayReplaceWithConstant) {
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LLVMContext Context;
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std::unique_ptr<Module> M(new Module("MyModule", Context));
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Type *IntTy = Type::getInt8Ty(Context);
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ArrayType *ArrayTy = ArrayType::get(IntTy, 2);
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Constant *A01Vals[2] = {ConstantInt::get(IntTy, 0),
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ConstantInt::get(IntTy, 1)};
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Constant *A01 = ConstantArray::get(ArrayTy, A01Vals);
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Constant *Global = new GlobalVariable(*M, IntTy, false,
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GlobalValue::ExternalLinkage, nullptr);
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Constant *GlobalInt = ConstantExpr::getPtrToInt(Global, IntTy);
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Constant *A0GVals[2] = {ConstantInt::get(IntTy, 0), GlobalInt};
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Constant *A0G = ConstantArray::get(ArrayTy, A0GVals);
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ASSERT_NE(A01, A0G);
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GlobalVariable *RefArray =
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new GlobalVariable(*M, ArrayTy, false, GlobalValue::ExternalLinkage, A0G);
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ASSERT_EQ(A0G, RefArray->getInitializer());
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GlobalInt->replaceAllUsesWith(ConstantInt::get(IntTy, 1));
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ASSERT_EQ(A01, RefArray->getInitializer());
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}
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TEST(ConstantsTest, ConstantExprReplaceWithConstant) {
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LLVMContext Context;
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std::unique_ptr<Module> M(new Module("MyModule", Context));
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Type *IntTy = Type::getInt8Ty(Context);
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Constant *G1 = new GlobalVariable(*M, IntTy, false,
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GlobalValue::ExternalLinkage, nullptr);
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Constant *G2 = new GlobalVariable(*M, IntTy, false,
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GlobalValue::ExternalLinkage, nullptr);
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ASSERT_NE(G1, G2);
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Constant *Int1 = ConstantExpr::getPtrToInt(G1, IntTy);
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Constant *Int2 = ConstantExpr::getPtrToInt(G2, IntTy);
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ASSERT_NE(Int1, Int2);
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GlobalVariable *Ref =
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new GlobalVariable(*M, IntTy, false, GlobalValue::ExternalLinkage, Int1);
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ASSERT_EQ(Int1, Ref->getInitializer());
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G1->replaceAllUsesWith(G2);
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ASSERT_EQ(Int2, Ref->getInitializer());
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}
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TEST(ConstantsTest, GEPReplaceWithConstant) {
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LLVMContext Context;
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std::unique_ptr<Module> M(new Module("MyModule", Context));
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Type *IntTy = Type::getInt32Ty(Context);
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Type *PtrTy = PointerType::get(IntTy, 0);
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auto *C1 = ConstantInt::get(IntTy, 1);
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auto *Placeholder = new GlobalVariable(
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*M, IntTy, false, GlobalValue::ExternalWeakLinkage, nullptr);
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auto *GEP = ConstantExpr::getGetElementPtr(IntTy, Placeholder, C1);
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ASSERT_EQ(GEP->getOperand(0), Placeholder);
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auto *Ref =
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new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
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ASSERT_EQ(GEP, Ref->getInitializer());
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auto *Global = new GlobalVariable(*M, IntTy, false,
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GlobalValue::ExternalLinkage, nullptr);
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auto *Alias = GlobalAlias::create(IntTy, 0, GlobalValue::ExternalLinkage,
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"alias", Global, M.get());
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Placeholder->replaceAllUsesWith(Alias);
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ASSERT_EQ(GEP, Ref->getInitializer());
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ASSERT_EQ(GEP->getOperand(0), Alias);
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}
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TEST(ConstantsTest, AliasCAPI) {
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LLVMContext Context;
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SMDiagnostic Error;
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std::unique_ptr<Module> M =
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parseAssemblyString("@g = global i32 42", Error, Context);
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GlobalVariable *G = M->getGlobalVariable("g");
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Type *I16Ty = Type::getInt16Ty(Context);
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Type *I16PTy = PointerType::get(I16Ty, 0);
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Constant *Aliasee = ConstantExpr::getBitCast(G, I16PTy);
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LLVMValueRef AliasRef =
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LLVMAddAlias2(wrap(M.get()), wrap(I16Ty), 0, wrap(Aliasee), "a");
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ASSERT_EQ(unwrap<GlobalAlias>(AliasRef)->getAliasee(), Aliasee);
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}
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static std::string getNameOfType(Type *T) {
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std::string S;
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raw_string_ostream RSOS(S);
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T->print(RSOS);
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return S;
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}
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TEST(ConstantsTest, BuildConstantDataArrays) {
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LLVMContext Context;
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for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
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Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
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ArrayType *ArrayTy = ArrayType::get(T, 2);
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Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
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Constant *CA = ConstantArray::get(ArrayTy, Vals);
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ASSERT_TRUE(isa<ConstantDataArray>(CA)) << " T = " << getNameOfType(T);
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auto *CDA = cast<ConstantDataArray>(CA);
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Constant *CA2 = ConstantDataArray::getRaw(
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CDA->getRawDataValues(), CDA->getNumElements(), CDA->getElementType());
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ASSERT_TRUE(CA == CA2) << " T = " << getNameOfType(T);
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}
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for (Type *T : {Type::getHalfTy(Context), Type::getBFloatTy(Context),
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Type::getFloatTy(Context), Type::getDoubleTy(Context)}) {
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ArrayType *ArrayTy = ArrayType::get(T, 2);
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Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
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Constant *CA = ConstantArray::get(ArrayTy, Vals);
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ASSERT_TRUE(isa<ConstantDataArray>(CA)) << " T = " << getNameOfType(T);
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auto *CDA = cast<ConstantDataArray>(CA);
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Constant *CA2 = ConstantDataArray::getRaw(
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CDA->getRawDataValues(), CDA->getNumElements(), CDA->getElementType());
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ASSERT_TRUE(CA == CA2) << " T = " << getNameOfType(T);
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|
}
|
|
}
|
|
|
|
TEST(ConstantsTest, BuildConstantDataVectors) {
|
|
LLVMContext 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 *CV = ConstantVector::get(Vals);
|
|
ASSERT_TRUE(isa<ConstantDataVector>(CV)) << " T = " << getNameOfType(T);
|
|
auto *CDV = cast<ConstantDataVector>(CV);
|
|
Constant *CV2 = ConstantDataVector::getRaw(
|
|
CDV->getRawDataValues(), CDV->getNumElements(), CDV->getElementType());
|
|
ASSERT_TRUE(CV == CV2) << " T = " << getNameOfType(T);
|
|
}
|
|
|
|
for (Type *T : {Type::getHalfTy(Context), Type::getBFloatTy(Context),
|
|
Type::getFloatTy(Context), Type::getDoubleTy(Context)}) {
|
|
Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
|
|
Constant *CV = ConstantVector::get(Vals);
|
|
ASSERT_TRUE(isa<ConstantDataVector>(CV)) << " T = " << getNameOfType(T);
|
|
auto *CDV = cast<ConstantDataVector>(CV);
|
|
Constant *CV2 = ConstantDataVector::getRaw(
|
|
CDV->getRawDataValues(), CDV->getNumElements(), CDV->getElementType());
|
|
ASSERT_TRUE(CV == CV2) << " 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);
|
|
/* With opaque pointers, no cast is necessary. */
|
|
EXPECT_EQ(C, G);
|
|
}
|
|
|
|
bool foldFuncPtrAndConstToNull(LLVMContext &Context, Module *TheModule,
|
|
uint64_t AndValue,
|
|
MaybeAlign FunctionAlign = std::nullopt) {
|
|
Type *VoidType(Type::getVoidTy(Context));
|
|
FunctionType *FuncType(FunctionType::get(VoidType, false));
|
|
Function *Func(
|
|
Function::Create(FuncType, GlobalValue::ExternalLinkage, "", TheModule));
|
|
|
|
if (FunctionAlign)
|
|
Func->setAlignment(*FunctionAlign);
|
|
|
|
IntegerType *ConstantIntType(Type::getInt32Ty(Context));
|
|
ConstantInt *TheConstant(ConstantInt::get(ConstantIntType, AndValue));
|
|
|
|
Constant *TheConstantExpr(ConstantExpr::getPtrToInt(Func, ConstantIntType));
|
|
|
|
Constant *C = ConstantFoldBinaryInstruction(Instruction::And, TheConstantExpr,
|
|
TheConstant);
|
|
bool Result = C && C->isNullValue();
|
|
|
|
if (!TheModule) {
|
|
// If the Module exists then it will delete the Function.
|
|
delete Func;
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
TEST(ConstantsTest, FoldFunctionPtrAlignUnknownAnd2) {
|
|
LLVMContext Context;
|
|
Module TheModule("TestModule", Context);
|
|
// When the DataLayout doesn't specify a function pointer alignment we
|
|
// assume in this case that it is 4 byte aligned. This is a bug but we can't
|
|
// fix it directly because it causes a code size regression on X86.
|
|
// FIXME: This test should be changed once existing targets have
|
|
// appropriate defaults. See associated FIXME in ConstantFoldBinaryInstruction
|
|
ASSERT_TRUE(foldFuncPtrAndConstToNull(Context, &TheModule, 2));
|
|
}
|
|
|
|
TEST(ConstantsTest, DontFoldFunctionPtrAlignUnknownAnd4) {
|
|
LLVMContext Context;
|
|
Module TheModule("TestModule", Context);
|
|
ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, &TheModule, 4));
|
|
}
|
|
|
|
TEST(ConstantsTest, FoldFunctionPtrAlign4) {
|
|
LLVMContext Context;
|
|
Module TheModule("TestModule", Context);
|
|
const char *AlignmentStrings[] = {"Fi32", "Fn32"};
|
|
|
|
for (unsigned AndValue = 1; AndValue <= 2; ++AndValue) {
|
|
for (const char *AlignmentString : AlignmentStrings) {
|
|
TheModule.setDataLayout(AlignmentString);
|
|
ASSERT_TRUE(foldFuncPtrAndConstToNull(Context, &TheModule, AndValue));
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST(ConstantsTest, DontFoldFunctionPtrAlign1) {
|
|
LLVMContext Context;
|
|
Module TheModule("TestModule", Context);
|
|
const char *AlignmentStrings[] = {"Fi8", "Fn8"};
|
|
|
|
for (const char *AlignmentString : AlignmentStrings) {
|
|
TheModule.setDataLayout(AlignmentString);
|
|
ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, &TheModule, 2));
|
|
}
|
|
}
|
|
|
|
TEST(ConstantsTest, FoldFunctionAlign4PtrAlignMultiple) {
|
|
LLVMContext Context;
|
|
Module TheModule("TestModule", Context);
|
|
TheModule.setDataLayout("Fn8");
|
|
ASSERT_TRUE(foldFuncPtrAndConstToNull(Context, &TheModule, 2, Align(4)));
|
|
}
|
|
|
|
TEST(ConstantsTest, DontFoldFunctionAlign4PtrAlignIndependent) {
|
|
LLVMContext Context;
|
|
Module TheModule("TestModule", Context);
|
|
TheModule.setDataLayout("Fi8");
|
|
ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, &TheModule, 2, Align(4)));
|
|
}
|
|
|
|
TEST(ConstantsTest, DontFoldFunctionPtrIfNoModule) {
|
|
LLVMContext Context;
|
|
// Even though the function is explicitly 4 byte aligned, in the absence of a
|
|
// DataLayout we can't assume that the function pointer is aligned.
|
|
ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, nullptr, 2, Align(4)));
|
|
}
|
|
|
|
TEST(ConstantsTest, FoldGlobalVariablePtr) {
|
|
LLVMContext Context;
|
|
|
|
IntegerType *IntType(Type::getInt32Ty(Context));
|
|
|
|
std::unique_ptr<GlobalVariable> Global(
|
|
new GlobalVariable(IntType, true, GlobalValue::ExternalLinkage));
|
|
|
|
Global->setAlignment(Align(4));
|
|
|
|
ConstantInt *TheConstant(ConstantInt::get(IntType, 2));
|
|
|
|
Constant *TheConstantExpr(ConstantExpr::getPtrToInt(Global.get(), IntType));
|
|
|
|
ASSERT_TRUE(ConstantFoldBinaryInstruction(Instruction::And, TheConstantExpr,
|
|
TheConstant)
|
|
->isNullValue());
|
|
}
|
|
|
|
// Check that containsUndefOrPoisonElement and containsPoisonElement is working
|
|
// great
|
|
|
|
TEST(ConstantsTest, containsUndefElemTest) {
|
|
LLVMContext Context;
|
|
|
|
Type *Int32Ty = Type::getInt32Ty(Context);
|
|
Constant *CU = UndefValue::get(Int32Ty);
|
|
Constant *CP = PoisonValue::get(Int32Ty);
|
|
Constant *C1 = ConstantInt::get(Int32Ty, 1);
|
|
Constant *C2 = ConstantInt::get(Int32Ty, 2);
|
|
|
|
{
|
|
Constant *V1 = ConstantVector::get({C1, C2});
|
|
EXPECT_FALSE(V1->containsUndefOrPoisonElement());
|
|
EXPECT_FALSE(V1->containsPoisonElement());
|
|
}
|
|
|
|
{
|
|
Constant *V2 = ConstantVector::get({C1, CU});
|
|
EXPECT_TRUE(V2->containsUndefOrPoisonElement());
|
|
EXPECT_FALSE(V2->containsPoisonElement());
|
|
}
|
|
|
|
{
|
|
Constant *V3 = ConstantVector::get({C1, CP});
|
|
EXPECT_TRUE(V3->containsUndefOrPoisonElement());
|
|
EXPECT_TRUE(V3->containsPoisonElement());
|
|
}
|
|
|
|
{
|
|
Constant *V4 = ConstantVector::get({CU, CP});
|
|
EXPECT_TRUE(V4->containsUndefOrPoisonElement());
|
|
EXPECT_TRUE(V4->containsPoisonElement());
|
|
}
|
|
}
|
|
|
|
// Check that undefined elements in vector constants are matched
|
|
// correctly for both integer and floating-point types. Just don't
|
|
// crash on vectors of pointers (could be handled?).
|
|
|
|
TEST(ConstantsTest, isElementWiseEqual) {
|
|
LLVMContext Context;
|
|
|
|
Type *Int32Ty = Type::getInt32Ty(Context);
|
|
Constant *CU = UndefValue::get(Int32Ty);
|
|
Constant *C1 = ConstantInt::get(Int32Ty, 1);
|
|
Constant *C2 = ConstantInt::get(Int32Ty, 2);
|
|
|
|
Constant *C1211 = ConstantVector::get({C1, C2, C1, C1});
|
|
Constant *C12U1 = ConstantVector::get({C1, C2, CU, C1});
|
|
Constant *C12U2 = ConstantVector::get({C1, C2, CU, C2});
|
|
Constant *C12U21 = ConstantVector::get({C1, C2, CU, C2, C1});
|
|
|
|
EXPECT_TRUE(C1211->isElementWiseEqual(C12U1));
|
|
EXPECT_TRUE(C12U1->isElementWiseEqual(C1211));
|
|
EXPECT_FALSE(C12U2->isElementWiseEqual(C12U1));
|
|
EXPECT_FALSE(C12U1->isElementWiseEqual(C12U2));
|
|
EXPECT_FALSE(C12U21->isElementWiseEqual(C12U2));
|
|
|
|
Type *FltTy = Type::getFloatTy(Context);
|
|
Constant *CFU = UndefValue::get(FltTy);
|
|
Constant *CF1 = ConstantFP::get(FltTy, 1.0);
|
|
Constant *CF2 = ConstantFP::get(FltTy, 2.0);
|
|
|
|
Constant *CF1211 = ConstantVector::get({CF1, CF2, CF1, CF1});
|
|
Constant *CF12U1 = ConstantVector::get({CF1, CF2, CFU, CF1});
|
|
Constant *CF12U2 = ConstantVector::get({CF1, CF2, CFU, CF2});
|
|
Constant *CFUU1U = ConstantVector::get({CFU, CFU, CF1, CFU});
|
|
|
|
EXPECT_TRUE(CF1211->isElementWiseEqual(CF12U1));
|
|
EXPECT_TRUE(CF12U1->isElementWiseEqual(CF1211));
|
|
EXPECT_TRUE(CFUU1U->isElementWiseEqual(CF12U1));
|
|
EXPECT_FALSE(CF12U2->isElementWiseEqual(CF12U1));
|
|
EXPECT_FALSE(CF12U1->isElementWiseEqual(CF12U2));
|
|
|
|
PointerType *PtrTy = PointerType::get(Context, 0);
|
|
Constant *CPU = UndefValue::get(PtrTy);
|
|
Constant *CP0 = ConstantPointerNull::get(PtrTy);
|
|
|
|
Constant *CP0000 = ConstantVector::get({CP0, CP0, CP0, CP0});
|
|
Constant *CP00U0 = ConstantVector::get({CP0, CP0, CPU, CP0});
|
|
Constant *CP00U = ConstantVector::get({CP0, CP0, CPU});
|
|
|
|
EXPECT_FALSE(CP0000->isElementWiseEqual(CP00U0));
|
|
EXPECT_FALSE(CP00U0->isElementWiseEqual(CP0000));
|
|
EXPECT_FALSE(CP0000->isElementWiseEqual(CP00U));
|
|
EXPECT_FALSE(CP00U->isElementWiseEqual(CP00U0));
|
|
}
|
|
|
|
// Check that vector/aggregate constants correctly store undef and poison
|
|
// elements.
|
|
|
|
TEST(ConstantsTest, CheckElementWiseUndefPoison) {
|
|
LLVMContext Context;
|
|
|
|
Type *Int32Ty = Type::getInt32Ty(Context);
|
|
StructType *STy = StructType::get(Int32Ty, Int32Ty);
|
|
ArrayType *ATy = ArrayType::get(Int32Ty, 2);
|
|
Constant *CU = UndefValue::get(Int32Ty);
|
|
Constant *CP = PoisonValue::get(Int32Ty);
|
|
|
|
{
|
|
Constant *CUU = ConstantVector::get({CU, CU});
|
|
Constant *CPP = ConstantVector::get({CP, CP});
|
|
Constant *CUP = ConstantVector::get({CU, CP});
|
|
Constant *CPU = ConstantVector::get({CP, CU});
|
|
EXPECT_EQ(CUU, UndefValue::get(CUU->getType()));
|
|
EXPECT_EQ(CPP, PoisonValue::get(CPP->getType()));
|
|
EXPECT_NE(CUP, UndefValue::get(CUP->getType()));
|
|
EXPECT_NE(CPU, UndefValue::get(CPU->getType()));
|
|
}
|
|
|
|
{
|
|
Constant *CUU = ConstantStruct::get(STy, {CU, CU});
|
|
Constant *CPP = ConstantStruct::get(STy, {CP, CP});
|
|
Constant *CUP = ConstantStruct::get(STy, {CU, CP});
|
|
Constant *CPU = ConstantStruct::get(STy, {CP, CU});
|
|
EXPECT_EQ(CUU, UndefValue::get(CUU->getType()));
|
|
EXPECT_EQ(CPP, PoisonValue::get(CPP->getType()));
|
|
EXPECT_NE(CUP, UndefValue::get(CUP->getType()));
|
|
EXPECT_NE(CPU, UndefValue::get(CPU->getType()));
|
|
}
|
|
|
|
{
|
|
Constant *CUU = ConstantArray::get(ATy, {CU, CU});
|
|
Constant *CPP = ConstantArray::get(ATy, {CP, CP});
|
|
Constant *CUP = ConstantArray::get(ATy, {CU, CP});
|
|
Constant *CPU = ConstantArray::get(ATy, {CP, CU});
|
|
EXPECT_EQ(CUU, UndefValue::get(CUU->getType()));
|
|
EXPECT_EQ(CPP, PoisonValue::get(CPP->getType()));
|
|
EXPECT_NE(CUP, UndefValue::get(CUP->getType()));
|
|
EXPECT_NE(CPU, UndefValue::get(CPU->getType()));
|
|
}
|
|
}
|
|
|
|
TEST(ConstantsTest, GetSplatValueRoundTrip) {
|
|
LLVMContext Context;
|
|
|
|
Type *FloatTy = Type::getFloatTy(Context);
|
|
Type *Int32Ty = Type::getInt32Ty(Context);
|
|
Type *Int8Ty = Type::getInt8Ty(Context);
|
|
|
|
for (unsigned Min : {1, 2, 8}) {
|
|
auto ScalableEC = ElementCount::getScalable(Min);
|
|
auto FixedEC = ElementCount::getFixed(Min);
|
|
|
|
for (auto EC : {ScalableEC, FixedEC}) {
|
|
for (auto *Ty : {FloatTy, Int32Ty, Int8Ty}) {
|
|
Constant *Zero = Constant::getNullValue(Ty);
|
|
Constant *One = Constant::getAllOnesValue(Ty);
|
|
|
|
for (auto *C : {Zero, One}) {
|
|
Constant *Splat = ConstantVector::getSplat(EC, C);
|
|
ASSERT_NE(nullptr, Splat);
|
|
|
|
Constant *SplatVal = Splat->getSplatValue();
|
|
EXPECT_NE(nullptr, SplatVal);
|
|
EXPECT_EQ(SplatVal, C);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST(ConstantsTest, ComdatUserTracking) {
|
|
LLVMContext Context;
|
|
Module M("MyModule", Context);
|
|
|
|
Comdat *C = M.getOrInsertComdat("comdat");
|
|
const SmallPtrSetImpl<GlobalObject *> &Users = C->getUsers();
|
|
EXPECT_TRUE(Users.size() == 0);
|
|
|
|
Type *Ty = Type::getInt8Ty(Context);
|
|
GlobalVariable *GV1 = cast<GlobalVariable>(M.getOrInsertGlobal("gv1", Ty));
|
|
GV1->setComdat(C);
|
|
EXPECT_TRUE(Users.size() == 1);
|
|
EXPECT_TRUE(Users.contains(GV1));
|
|
|
|
GlobalVariable *GV2 = cast<GlobalVariable>(M.getOrInsertGlobal("gv2", Ty));
|
|
GV2->setComdat(C);
|
|
EXPECT_TRUE(Users.size() == 2);
|
|
EXPECT_TRUE(Users.contains(GV2));
|
|
|
|
GV1->eraseFromParent();
|
|
EXPECT_TRUE(Users.size() == 1);
|
|
EXPECT_TRUE(Users.contains(GV2));
|
|
|
|
GV2->eraseFromParent();
|
|
EXPECT_TRUE(Users.size() == 0);
|
|
}
|
|
|
|
} // end anonymous namespace
|
|
} // end namespace llvm
|