| //===- ConstantRangeTest.cpp - ConstantRange tests ------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/IR/ConstantRange.h" |
| #include "llvm/IR/Instructions.h" |
| #include "llvm/IR/Operator.h" |
| #include "llvm/Support/KnownBits.h" |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| class ConstantRangeTest : public ::testing::Test { |
| protected: |
| static ConstantRange Full; |
| static ConstantRange Empty; |
| static ConstantRange One; |
| static ConstantRange Some; |
| static ConstantRange Wrap; |
| }; |
| |
| template<typename Fn> |
| static void EnumerateConstantRanges(unsigned Bits, Fn TestFn) { |
| unsigned Max = 1 << Bits; |
| for (unsigned Lo = 0; Lo < Max; Lo++) { |
| for (unsigned Hi = 0; Hi < Max; Hi++) { |
| // Enforce ConstantRange invariant. |
| if (Lo == Hi && Lo != 0 && Lo != Max - 1) |
| continue; |
| |
| ConstantRange CR(APInt(Bits, Lo), APInt(Bits, Hi)); |
| TestFn(CR); |
| } |
| } |
| } |
| |
| template<typename Fn> |
| static void EnumerateTwoConstantRanges(unsigned Bits, Fn TestFn) { |
| EnumerateConstantRanges(Bits, [&](const ConstantRange &CR1) { |
| EnumerateConstantRanges(Bits, [&](const ConstantRange &CR2) { |
| TestFn(CR1, CR2); |
| }); |
| }); |
| } |
| |
| template<typename Fn> |
| static void ForeachNumInConstantRange(const ConstantRange &CR, Fn TestFn) { |
| if (!CR.isEmptySet()) { |
| APInt N = CR.getLower(); |
| do TestFn(N); |
| while (++N != CR.getUpper()); |
| } |
| } |
| |
| ConstantRange ConstantRangeTest::Full(16, true); |
| ConstantRange ConstantRangeTest::Empty(16, false); |
| ConstantRange ConstantRangeTest::One(APInt(16, 0xa)); |
| ConstantRange ConstantRangeTest::Some(APInt(16, 0xa), APInt(16, 0xaaa)); |
| ConstantRange ConstantRangeTest::Wrap(APInt(16, 0xaaa), APInt(16, 0xa)); |
| |
| TEST_F(ConstantRangeTest, Basics) { |
| EXPECT_TRUE(Full.isFullSet()); |
| EXPECT_FALSE(Full.isEmptySet()); |
| EXPECT_TRUE(Full.inverse().isEmptySet()); |
| EXPECT_FALSE(Full.isWrappedSet()); |
| EXPECT_TRUE(Full.contains(APInt(16, 0x0))); |
| EXPECT_TRUE(Full.contains(APInt(16, 0x9))); |
| EXPECT_TRUE(Full.contains(APInt(16, 0xa))); |
| EXPECT_TRUE(Full.contains(APInt(16, 0xaa9))); |
| EXPECT_TRUE(Full.contains(APInt(16, 0xaaa))); |
| |
| EXPECT_FALSE(Empty.isFullSet()); |
| EXPECT_TRUE(Empty.isEmptySet()); |
| EXPECT_TRUE(Empty.inverse().isFullSet()); |
| EXPECT_FALSE(Empty.isWrappedSet()); |
| EXPECT_FALSE(Empty.contains(APInt(16, 0x0))); |
| EXPECT_FALSE(Empty.contains(APInt(16, 0x9))); |
| EXPECT_FALSE(Empty.contains(APInt(16, 0xa))); |
| EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9))); |
| EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa))); |
| |
| EXPECT_FALSE(One.isFullSet()); |
| EXPECT_FALSE(One.isEmptySet()); |
| EXPECT_FALSE(One.isWrappedSet()); |
| EXPECT_FALSE(One.contains(APInt(16, 0x0))); |
| EXPECT_FALSE(One.contains(APInt(16, 0x9))); |
| EXPECT_TRUE(One.contains(APInt(16, 0xa))); |
| EXPECT_FALSE(One.contains(APInt(16, 0xaa9))); |
| EXPECT_FALSE(One.contains(APInt(16, 0xaaa))); |
| EXPECT_FALSE(One.inverse().contains(APInt(16, 0xa))); |
| |
| EXPECT_FALSE(Some.isFullSet()); |
| EXPECT_FALSE(Some.isEmptySet()); |
| EXPECT_FALSE(Some.isWrappedSet()); |
| EXPECT_FALSE(Some.contains(APInt(16, 0x0))); |
| EXPECT_FALSE(Some.contains(APInt(16, 0x9))); |
| EXPECT_TRUE(Some.contains(APInt(16, 0xa))); |
| EXPECT_TRUE(Some.contains(APInt(16, 0xaa9))); |
| EXPECT_FALSE(Some.contains(APInt(16, 0xaaa))); |
| |
| EXPECT_FALSE(Wrap.isFullSet()); |
| EXPECT_FALSE(Wrap.isEmptySet()); |
| EXPECT_TRUE(Wrap.isWrappedSet()); |
| EXPECT_TRUE(Wrap.contains(APInt(16, 0x0))); |
| EXPECT_TRUE(Wrap.contains(APInt(16, 0x9))); |
| EXPECT_FALSE(Wrap.contains(APInt(16, 0xa))); |
| EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9))); |
| EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa))); |
| } |
| |
| TEST_F(ConstantRangeTest, Equality) { |
| EXPECT_EQ(Full, Full); |
| EXPECT_EQ(Empty, Empty); |
| EXPECT_EQ(One, One); |
| EXPECT_EQ(Some, Some); |
| EXPECT_EQ(Wrap, Wrap); |
| EXPECT_NE(Full, Empty); |
| EXPECT_NE(Full, One); |
| EXPECT_NE(Full, Some); |
| EXPECT_NE(Full, Wrap); |
| EXPECT_NE(Empty, One); |
| EXPECT_NE(Empty, Some); |
| EXPECT_NE(Empty, Wrap); |
| EXPECT_NE(One, Some); |
| EXPECT_NE(One, Wrap); |
| EXPECT_NE(Some, Wrap); |
| } |
| |
| TEST_F(ConstantRangeTest, SingleElement) { |
| EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(nullptr)); |
| EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(nullptr)); |
| EXPECT_EQ(Full.getSingleMissingElement(), static_cast<APInt *>(nullptr)); |
| EXPECT_EQ(Empty.getSingleMissingElement(), static_cast<APInt *>(nullptr)); |
| |
| EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa)); |
| EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(nullptr)); |
| EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(nullptr)); |
| |
| EXPECT_EQ(One.getSingleMissingElement(), static_cast<APInt *>(nullptr)); |
| EXPECT_EQ(Some.getSingleMissingElement(), static_cast<APInt *>(nullptr)); |
| |
| ConstantRange OneInverse = One.inverse(); |
| EXPECT_EQ(*OneInverse.getSingleMissingElement(), *One.getSingleElement()); |
| |
| EXPECT_FALSE(Full.isSingleElement()); |
| EXPECT_FALSE(Empty.isSingleElement()); |
| EXPECT_TRUE(One.isSingleElement()); |
| EXPECT_FALSE(Some.isSingleElement()); |
| EXPECT_FALSE(Wrap.isSingleElement()); |
| } |
| |
| TEST_F(ConstantRangeTest, GetMinsAndMaxes) { |
| EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX)); |
| EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa)); |
| EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9)); |
| EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX)); |
| |
| EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0)); |
| EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa)); |
| EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa)); |
| EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0)); |
| |
| EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX)); |
| EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa)); |
| EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9)); |
| EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX)); |
| |
| EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN)); |
| EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa)); |
| EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa)); |
| EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN)); |
| |
| // Found by Klee |
| EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(), |
| APInt(4, 7)); |
| } |
| |
| TEST_F(ConstantRangeTest, SignWrapped) { |
| EXPECT_FALSE(Full.isSignWrappedSet()); |
| EXPECT_FALSE(Empty.isSignWrappedSet()); |
| EXPECT_FALSE(One.isSignWrappedSet()); |
| EXPECT_FALSE(Some.isSignWrappedSet()); |
| EXPECT_TRUE(Wrap.isSignWrappedSet()); |
| |
| EXPECT_FALSE(ConstantRange(APInt(8, 127), APInt(8, 128)).isSignWrappedSet()); |
| EXPECT_TRUE(ConstantRange(APInt(8, 127), APInt(8, 129)).isSignWrappedSet()); |
| EXPECT_FALSE(ConstantRange(APInt(8, 128), APInt(8, 129)).isSignWrappedSet()); |
| EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 9)).isSignWrappedSet()); |
| EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 250)).isSignWrappedSet()); |
| EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 10)).isSignWrappedSet()); |
| EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 251)).isSignWrappedSet()); |
| } |
| |
| TEST_F(ConstantRangeTest, UpperWrapped) { |
| // The behavior here is the same as for isWrappedSet() / isSignWrappedSet(). |
| EXPECT_FALSE(Full.isUpperWrapped()); |
| EXPECT_FALSE(Empty.isUpperWrapped()); |
| EXPECT_FALSE(One.isUpperWrapped()); |
| EXPECT_FALSE(Some.isUpperWrapped()); |
| EXPECT_TRUE(Wrap.isUpperWrapped()); |
| EXPECT_FALSE(Full.isUpperSignWrapped()); |
| EXPECT_FALSE(Empty.isUpperSignWrapped()); |
| EXPECT_FALSE(One.isUpperSignWrapped()); |
| EXPECT_FALSE(Some.isUpperSignWrapped()); |
| EXPECT_TRUE(Wrap.isUpperSignWrapped()); |
| |
| // The behavior differs if Upper is the Min/SignedMin value. |
| ConstantRange CR1(APInt(8, 42), APInt::getMinValue(8)); |
| EXPECT_FALSE(CR1.isWrappedSet()); |
| EXPECT_TRUE(CR1.isUpperWrapped()); |
| |
| ConstantRange CR2(APInt(8, 42), APInt::getSignedMinValue(8)); |
| EXPECT_FALSE(CR2.isSignWrappedSet()); |
| EXPECT_TRUE(CR2.isUpperSignWrapped()); |
| } |
| |
| TEST_F(ConstantRangeTest, Trunc) { |
| ConstantRange TFull = Full.truncate(10); |
| ConstantRange TEmpty = Empty.truncate(10); |
| ConstantRange TOne = One.truncate(10); |
| ConstantRange TSome = Some.truncate(10); |
| ConstantRange TWrap = Wrap.truncate(10); |
| EXPECT_TRUE(TFull.isFullSet()); |
| EXPECT_TRUE(TEmpty.isEmptySet()); |
| EXPECT_EQ(TOne, ConstantRange(One.getLower().trunc(10), |
| One.getUpper().trunc(10))); |
| EXPECT_TRUE(TSome.isFullSet()); |
| EXPECT_TRUE(TWrap.isFullSet()); |
| |
| // trunc([2, 5), 3->2) = [2, 1) |
| ConstantRange TwoFive(APInt(3, 2), APInt(3, 5)); |
| EXPECT_EQ(TwoFive.truncate(2), ConstantRange(APInt(2, 2), APInt(2, 1))); |
| |
| // trunc([2, 6), 3->2) = full |
| ConstantRange TwoSix(APInt(3, 2), APInt(3, 6)); |
| EXPECT_TRUE(TwoSix.truncate(2).isFullSet()); |
| |
| // trunc([5, 7), 3->2) = [1, 3) |
| ConstantRange FiveSeven(APInt(3, 5), APInt(3, 7)); |
| EXPECT_EQ(FiveSeven.truncate(2), ConstantRange(APInt(2, 1), APInt(2, 3))); |
| |
| // trunc([7, 1), 3->2) = [3, 1) |
| ConstantRange SevenOne(APInt(3, 7), APInt(3, 1)); |
| EXPECT_EQ(SevenOne.truncate(2), ConstantRange(APInt(2, 3), APInt(2, 1))); |
| } |
| |
| TEST_F(ConstantRangeTest, ZExt) { |
| ConstantRange ZFull = Full.zeroExtend(20); |
| ConstantRange ZEmpty = Empty.zeroExtend(20); |
| ConstantRange ZOne = One.zeroExtend(20); |
| ConstantRange ZSome = Some.zeroExtend(20); |
| ConstantRange ZWrap = Wrap.zeroExtend(20); |
| EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000))); |
| EXPECT_TRUE(ZEmpty.isEmptySet()); |
| EXPECT_EQ(ZOne, ConstantRange(One.getLower().zext(20), |
| One.getUpper().zext(20))); |
| EXPECT_EQ(ZSome, ConstantRange(Some.getLower().zext(20), |
| Some.getUpper().zext(20))); |
| EXPECT_EQ(ZWrap, ConstantRange(APInt(20, 0), APInt(20, 0x10000))); |
| |
| // zext([5, 0), 3->7) = [5, 8) |
| ConstantRange FiveZero(APInt(3, 5), APInt(3, 0)); |
| EXPECT_EQ(FiveZero.zeroExtend(7), ConstantRange(APInt(7, 5), APInt(7, 8))); |
| } |
| |
| TEST_F(ConstantRangeTest, SExt) { |
| ConstantRange SFull = Full.signExtend(20); |
| ConstantRange SEmpty = Empty.signExtend(20); |
| ConstantRange SOne = One.signExtend(20); |
| ConstantRange SSome = Some.signExtend(20); |
| ConstantRange SWrap = Wrap.signExtend(20); |
| EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true), |
| APInt(20, INT16_MAX + 1, true))); |
| EXPECT_TRUE(SEmpty.isEmptySet()); |
| EXPECT_EQ(SOne, ConstantRange(One.getLower().sext(20), |
| One.getUpper().sext(20))); |
| EXPECT_EQ(SSome, ConstantRange(Some.getLower().sext(20), |
| Some.getUpper().sext(20))); |
| EXPECT_EQ(SWrap, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true), |
| APInt(20, INT16_MAX + 1, true))); |
| |
| EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, 140)).signExtend(16), |
| ConstantRange(APInt(16, -128), APInt(16, 128))); |
| |
| EXPECT_EQ(ConstantRange(APInt(16, 0x0200), APInt(16, 0x8000)).signExtend(19), |
| ConstantRange(APInt(19, 0x0200), APInt(19, 0x8000))); |
| } |
| |
| TEST_F(ConstantRangeTest, IntersectWith) { |
| EXPECT_EQ(Empty.intersectWith(Full), Empty); |
| EXPECT_EQ(Empty.intersectWith(Empty), Empty); |
| EXPECT_EQ(Empty.intersectWith(One), Empty); |
| EXPECT_EQ(Empty.intersectWith(Some), Empty); |
| EXPECT_EQ(Empty.intersectWith(Wrap), Empty); |
| EXPECT_EQ(Full.intersectWith(Full), Full); |
| EXPECT_EQ(Some.intersectWith(Some), Some); |
| EXPECT_EQ(Some.intersectWith(One), One); |
| EXPECT_EQ(Full.intersectWith(One), One); |
| EXPECT_EQ(Full.intersectWith(Some), Some); |
| EXPECT_EQ(Some.intersectWith(Wrap), Empty); |
| EXPECT_EQ(One.intersectWith(Wrap), Empty); |
| EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One)); |
| |
| // Klee generated testcase from PR4545. |
| // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like |
| // 01..4.6789ABCDEF where the dots represent values not in the intersection. |
| ConstantRange LHS(APInt(16, 4), APInt(16, 2)); |
| ConstantRange RHS(APInt(16, 6), APInt(16, 5)); |
| EXPECT_TRUE(LHS.intersectWith(RHS) == LHS); |
| |
| // previous bug: intersection of [min, 3) and [2, max) should be 2 |
| LHS = ConstantRange(APInt(32, -2147483646), APInt(32, 3)); |
| RHS = ConstantRange(APInt(32, 2), APInt(32, 2147483646)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2))); |
| |
| // [2, 0) /\ [4, 3) = [2, 0) |
| LHS = ConstantRange(APInt(32, 2), APInt(32, 0)); |
| RHS = ConstantRange(APInt(32, 4), APInt(32, 3)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2), APInt(32, 0))); |
| |
| // [2, 0) /\ [4, 2) = [4, 0) |
| LHS = ConstantRange(APInt(32, 2), APInt(32, 0)); |
| RHS = ConstantRange(APInt(32, 4), APInt(32, 2)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 0))); |
| |
| // [4, 2) /\ [5, 1) = [5, 1) |
| LHS = ConstantRange(APInt(32, 4), APInt(32, 2)); |
| RHS = ConstantRange(APInt(32, 5), APInt(32, 1)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 5), APInt(32, 1))); |
| |
| // [2, 0) /\ [7, 4) = [7, 4) |
| LHS = ConstantRange(APInt(32, 2), APInt(32, 0)); |
| RHS = ConstantRange(APInt(32, 7), APInt(32, 4)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 7), APInt(32, 4))); |
| |
| // [4, 2) /\ [1, 0) = [1, 0) |
| LHS = ConstantRange(APInt(32, 4), APInt(32, 2)); |
| RHS = ConstantRange(APInt(32, 1), APInt(32, 0)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 2))); |
| |
| // [15, 0) /\ [7, 6) = [15, 0) |
| LHS = ConstantRange(APInt(32, 15), APInt(32, 0)); |
| RHS = ConstantRange(APInt(32, 7), APInt(32, 6)); |
| EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 15), APInt(32, 0))); |
| } |
| |
| template<typename Fn1, typename Fn2> |
| void testBinarySetOperationExhaustive(Fn1 OpFn, Fn2 InResultFn) { |
| unsigned Bits = 4; |
| EnumerateTwoConstantRanges(Bits, |
| [=](const ConstantRange &CR1, const ConstantRange &CR2) { |
| // Collect up to three contiguous unsigned ranges. The HaveInterrupt |
| // variables are used determine when we have to switch to the next |
| // range because the previous one ended. |
| APInt Lower1(Bits, 0), Upper1(Bits, 0); |
| APInt Lower2(Bits, 0), Upper2(Bits, 0); |
| APInt Lower3(Bits, 0), Upper3(Bits, 0); |
| bool HaveRange1 = false, HaveInterrupt1 = false; |
| bool HaveRange2 = false, HaveInterrupt2 = false; |
| bool HaveRange3 = false, HaveInterrupt3 = false; |
| |
| APInt Num(Bits, 0); |
| for (unsigned I = 0, Limit = 1 << Bits; I < Limit; ++I, ++Num) { |
| if (!InResultFn(CR1, CR2, Num)) { |
| if (HaveRange3) |
| HaveInterrupt3 = true; |
| else if (HaveRange2) |
| HaveInterrupt2 = true; |
| else if (HaveRange1) |
| HaveInterrupt1 = true; |
| continue; |
| } |
| |
| if (HaveRange3) { |
| Upper3 = Num; |
| } else if (HaveInterrupt2) { |
| HaveRange3 = true; |
| Lower3 = Upper3 = Num; |
| } else if (HaveRange2) { |
| Upper2 = Num; |
| } else if (HaveInterrupt1) { |
| HaveRange2 = true; |
| Lower2 = Upper2 = Num; |
| } else if (HaveRange1) { |
| Upper1 = Num; |
| } else { |
| HaveRange1 = true; |
| Lower1 = Upper1 = Num; |
| } |
| } |
| |
| assert(!HaveInterrupt3 && "Should have at most three ranges"); |
| |
| ConstantRange SmallestCR = OpFn(CR1, CR2, ConstantRange::Smallest); |
| ConstantRange UnsignedCR = OpFn(CR1, CR2, ConstantRange::Unsigned); |
| ConstantRange SignedCR = OpFn(CR1, CR2, ConstantRange::Signed); |
| |
| if (!HaveRange1) { |
| EXPECT_TRUE(SmallestCR.isEmptySet()); |
| EXPECT_TRUE(UnsignedCR.isEmptySet()); |
| EXPECT_TRUE(SignedCR.isEmptySet()); |
| return; |
| } |
| |
| if (!HaveRange2) { |
| if (Lower1 == Upper1 + 1) { |
| EXPECT_TRUE(SmallestCR.isFullSet()); |
| EXPECT_TRUE(UnsignedCR.isFullSet()); |
| EXPECT_TRUE(SignedCR.isFullSet()); |
| } else { |
| ConstantRange Expected(Lower1, Upper1 + 1); |
| EXPECT_EQ(Expected, SmallestCR); |
| EXPECT_EQ(Expected, UnsignedCR); |
| EXPECT_EQ(Expected, SignedCR); |
| } |
| return; |
| } |
| |
| ConstantRange Variant1(Bits, /*full*/ true); |
| ConstantRange Variant2(Bits, /*full*/ true); |
| if (!HaveRange3) { |
| // Compute the two possible ways to cover two disjoint ranges. |
| if (Lower1 != Upper2 + 1) |
| Variant1 = ConstantRange(Lower1, Upper2 + 1); |
| if (Lower2 != Upper1 + 1) |
| Variant2 = ConstantRange(Lower2, Upper1 + 1); |
| } else { |
| // If we have three ranges, the first and last one have to be adjacent |
| // to the unsigned domain. It's better to think of this as having two |
| // holes, and we can construct one range using each hole. |
| assert(Lower1.isNullValue() && Upper3.isMaxValue()); |
| Variant1 = ConstantRange(Lower2, Upper1 + 1); |
| Variant2 = ConstantRange(Lower3, Upper2 + 1); |
| } |
| |
| // Smallest: Smaller set, then any set. |
| if (Variant1.isSizeStrictlySmallerThan(Variant2)) |
| EXPECT_EQ(Variant1, SmallestCR); |
| else if (Variant2.isSizeStrictlySmallerThan(Variant1)) |
| EXPECT_EQ(Variant2, SmallestCR); |
| else |
| EXPECT_TRUE(Variant1 == SmallestCR || Variant2 == SmallestCR); |
| |
| // Unsigned: Non-wrapped set, then smaller set, then any set. |
| bool Variant1Full = Variant1.isFullSet() || Variant1.isWrappedSet(); |
| bool Variant2Full = Variant2.isFullSet() || Variant2.isWrappedSet(); |
| if (!Variant1Full && Variant2Full) |
| EXPECT_EQ(Variant1, UnsignedCR); |
| else if (Variant1Full && !Variant2Full) |
| EXPECT_EQ(Variant2, UnsignedCR); |
| else if (Variant1.isSizeStrictlySmallerThan(Variant2)) |
| EXPECT_EQ(Variant1, UnsignedCR); |
| else if (Variant2.isSizeStrictlySmallerThan(Variant1)) |
| EXPECT_EQ(Variant2, UnsignedCR); |
| else |
| EXPECT_TRUE(Variant1 == UnsignedCR || Variant2 == UnsignedCR); |
| |
| // Signed: Signed non-wrapped set, then smaller set, then any set. |
| Variant1Full = Variant1.isFullSet() || Variant1.isSignWrappedSet(); |
| Variant2Full = Variant2.isFullSet() || Variant2.isSignWrappedSet(); |
| if (!Variant1Full && Variant2Full) |
| EXPECT_EQ(Variant1, SignedCR); |
| else if (Variant1Full && !Variant2Full) |
| EXPECT_EQ(Variant2, SignedCR); |
| else if (Variant1.isSizeStrictlySmallerThan(Variant2)) |
| EXPECT_EQ(Variant1, SignedCR); |
| else if (Variant2.isSizeStrictlySmallerThan(Variant1)) |
| EXPECT_EQ(Variant2, SignedCR); |
| else |
| EXPECT_TRUE(Variant1 == SignedCR || Variant2 == SignedCR); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, IntersectWithExhaustive) { |
| testBinarySetOperationExhaustive( |
| [](const ConstantRange &CR1, const ConstantRange &CR2, |
| ConstantRange::PreferredRangeType Type) { |
| return CR1.intersectWith(CR2, Type); |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2, const APInt &N) { |
| return CR1.contains(N) && CR2.contains(N); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, UnionWithExhaustive) { |
| testBinarySetOperationExhaustive( |
| [](const ConstantRange &CR1, const ConstantRange &CR2, |
| ConstantRange::PreferredRangeType Type) { |
| return CR1.unionWith(CR2, Type); |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2, const APInt &N) { |
| return CR1.contains(N) || CR2.contains(N); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, UnionWith) { |
| EXPECT_EQ(Wrap.unionWith(One), |
| ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb))); |
| EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One)); |
| EXPECT_EQ(Empty.unionWith(Empty), Empty); |
| EXPECT_EQ(Full.unionWith(Full), Full); |
| EXPECT_EQ(Some.unionWith(Wrap), Full); |
| |
| // PR4545 |
| EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith( |
| ConstantRange(APInt(16, 0), APInt(16, 8))), |
| ConstantRange(APInt(16, 14), APInt(16, 8))); |
| EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith( |
| ConstantRange(APInt(16, 4), APInt(16, 0))), |
| ConstantRange::getFull(16)); |
| EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith( |
| ConstantRange(APInt(16, 2), APInt(16, 1))), |
| ConstantRange::getFull(16)); |
| } |
| |
| TEST_F(ConstantRangeTest, SetDifference) { |
| EXPECT_EQ(Full.difference(Empty), Full); |
| EXPECT_EQ(Full.difference(Full), Empty); |
| EXPECT_EQ(Empty.difference(Empty), Empty); |
| EXPECT_EQ(Empty.difference(Full), Empty); |
| |
| ConstantRange A(APInt(16, 3), APInt(16, 7)); |
| ConstantRange B(APInt(16, 5), APInt(16, 9)); |
| ConstantRange C(APInt(16, 3), APInt(16, 5)); |
| ConstantRange D(APInt(16, 7), APInt(16, 9)); |
| ConstantRange E(APInt(16, 5), APInt(16, 4)); |
| ConstantRange F(APInt(16, 7), APInt(16, 3)); |
| EXPECT_EQ(A.difference(B), C); |
| EXPECT_EQ(B.difference(A), D); |
| EXPECT_EQ(E.difference(A), F); |
| } |
| |
| TEST_F(ConstantRangeTest, SubtractAPInt) { |
| EXPECT_EQ(Full.subtract(APInt(16, 4)), Full); |
| EXPECT_EQ(Empty.subtract(APInt(16, 4)), Empty); |
| EXPECT_EQ(Some.subtract(APInt(16, 4)), |
| ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6))); |
| EXPECT_EQ(Wrap.subtract(APInt(16, 4)), |
| ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6))); |
| EXPECT_EQ(One.subtract(APInt(16, 4)), |
| ConstantRange(APInt(16, 0x6))); |
| } |
| |
| TEST_F(ConstantRangeTest, Add) { |
| EXPECT_EQ(Full.add(APInt(16, 4)), Full); |
| EXPECT_EQ(Full.add(Full), Full); |
| EXPECT_EQ(Full.add(Empty), Empty); |
| EXPECT_EQ(Full.add(One), Full); |
| EXPECT_EQ(Full.add(Some), Full); |
| EXPECT_EQ(Full.add(Wrap), Full); |
| EXPECT_EQ(Empty.add(Empty), Empty); |
| EXPECT_EQ(Empty.add(One), Empty); |
| EXPECT_EQ(Empty.add(Some), Empty); |
| EXPECT_EQ(Empty.add(Wrap), Empty); |
| EXPECT_EQ(Empty.add(APInt(16, 4)), Empty); |
| EXPECT_EQ(Some.add(APInt(16, 4)), |
| ConstantRange(APInt(16, 0xe), APInt(16, 0xaae))); |
| EXPECT_EQ(Wrap.add(APInt(16, 4)), |
| ConstantRange(APInt(16, 0xaae), APInt(16, 0xe))); |
| EXPECT_EQ(One.add(APInt(16, 4)), |
| ConstantRange(APInt(16, 0xe))); |
| } |
| |
| TEST_F(ConstantRangeTest, AddWithNoSignedWrap) { |
| EXPECT_EQ(Empty.addWithNoSignedWrap(APInt(16, 1)), Empty); |
| EXPECT_EQ(Full.addWithNoSignedWrap(APInt(16, 1)), |
| ConstantRange(APInt(16, INT16_MIN+1), APInt(16, INT16_MIN))); |
| EXPECT_EQ(ConstantRange(APInt(8, -50), APInt(8, 50)).addWithNoSignedWrap(APInt(8, 10)), |
| ConstantRange(APInt(8, -40), APInt(8, 60))); |
| EXPECT_EQ(ConstantRange(APInt(8, -50), APInt(8, 120)).addWithNoSignedWrap(APInt(8, 10)), |
| ConstantRange(APInt(8, -40), APInt(8, INT8_MIN))); |
| EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, -10)).addWithNoSignedWrap(APInt(8, 5)), |
| ConstantRange(APInt(8, 125), APInt(8, -5))); |
| EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, -120)).addWithNoSignedWrap(APInt(8, 10)), |
| ConstantRange(APInt(8, INT8_MIN+10), APInt(8, -110))); |
| |
| EXPECT_EQ(Empty.addWithNoSignedWrap(APInt(16, -1)), Empty); |
| EXPECT_EQ(Full.addWithNoSignedWrap(APInt(16, -1)), |
| ConstantRange(APInt(16, INT16_MIN), APInt(16, INT16_MAX))); |
| EXPECT_EQ(ConstantRange(APInt(8, -50), APInt(8, 50)).addWithNoSignedWrap(APInt(8, -10)), |
| ConstantRange(APInt(8, -60), APInt(8, 40))); |
| EXPECT_EQ(ConstantRange(APInt(8, -120), APInt(8, 50)).addWithNoSignedWrap(APInt(8, -10)), |
| ConstantRange(APInt(8, INT8_MIN), APInt(8, 40))); |
| EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, -120)).addWithNoSignedWrap(APInt(8, -5)), |
| ConstantRange(APInt(8, 115), APInt(8, -125))); |
| EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, -120)).addWithNoSignedWrap(APInt(8, -10)), |
| ConstantRange(APInt(8, 110), APInt(8, INT8_MIN-10))); |
| } |
| |
| TEST_F(ConstantRangeTest, Sub) { |
| EXPECT_EQ(Full.sub(APInt(16, 4)), Full); |
| EXPECT_EQ(Full.sub(Full), Full); |
| EXPECT_EQ(Full.sub(Empty), Empty); |
| EXPECT_EQ(Full.sub(One), Full); |
| EXPECT_EQ(Full.sub(Some), Full); |
| EXPECT_EQ(Full.sub(Wrap), Full); |
| EXPECT_EQ(Empty.sub(Empty), Empty); |
| EXPECT_EQ(Empty.sub(One), Empty); |
| EXPECT_EQ(Empty.sub(Some), Empty); |
| EXPECT_EQ(Empty.sub(Wrap), Empty); |
| EXPECT_EQ(Empty.sub(APInt(16, 4)), Empty); |
| EXPECT_EQ(Some.sub(APInt(16, 4)), |
| ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6))); |
| EXPECT_EQ(Some.sub(Some), |
| ConstantRange(APInt(16, 0xf561), APInt(16, 0xaa0))); |
| EXPECT_EQ(Wrap.sub(APInt(16, 4)), |
| ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6))); |
| EXPECT_EQ(One.sub(APInt(16, 4)), |
| ConstantRange(APInt(16, 0x6))); |
| } |
| |
| TEST_F(ConstantRangeTest, Multiply) { |
| EXPECT_EQ(Full.multiply(Full), Full); |
| EXPECT_EQ(Full.multiply(Empty), Empty); |
| EXPECT_EQ(Full.multiply(One), Full); |
| EXPECT_EQ(Full.multiply(Some), Full); |
| EXPECT_EQ(Full.multiply(Wrap), Full); |
| EXPECT_EQ(Empty.multiply(Empty), Empty); |
| EXPECT_EQ(Empty.multiply(One), Empty); |
| EXPECT_EQ(Empty.multiply(Some), Empty); |
| EXPECT_EQ(Empty.multiply(Wrap), Empty); |
| EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa), |
| APInt(16, 0xa*0xa + 1))); |
| EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa), |
| APInt(16, 0xa*0xaa9 + 1))); |
| EXPECT_EQ(One.multiply(Wrap), Full); |
| EXPECT_EQ(Some.multiply(Some), Full); |
| EXPECT_EQ(Some.multiply(Wrap), Full); |
| EXPECT_EQ(Wrap.multiply(Wrap), Full); |
| |
| ConstantRange Zero(APInt(16, 0)); |
| EXPECT_EQ(Zero.multiply(Full), Zero); |
| EXPECT_EQ(Zero.multiply(Some), Zero); |
| EXPECT_EQ(Zero.multiply(Wrap), Zero); |
| EXPECT_EQ(Full.multiply(Zero), Zero); |
| EXPECT_EQ(Some.multiply(Zero), Zero); |
| EXPECT_EQ(Wrap.multiply(Zero), Zero); |
| |
| // http://llvm.org/PR4545 |
| EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply( |
| ConstantRange(APInt(4, 6), APInt(4, 2))), |
| ConstantRange(4, /*isFullSet=*/true)); |
| |
| EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 0)).multiply( |
| ConstantRange(APInt(8, 252), APInt(8, 4))), |
| ConstantRange(APInt(8, 250), APInt(8, 9))); |
| EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 255)).multiply( |
| ConstantRange(APInt(8, 2), APInt(8, 4))), |
| ConstantRange(APInt(8, 250), APInt(8, 253))); |
| |
| // TODO: This should be return [-2, 0] |
| EXPECT_EQ(ConstantRange(APInt(8, -2)).multiply( |
| ConstantRange(APInt(8, 0), APInt(8, 2))), |
| ConstantRange(APInt(8, -2), APInt(8, 1))); |
| } |
| |
| TEST_F(ConstantRangeTest, UMax) { |
| EXPECT_EQ(Full.umax(Full), Full); |
| EXPECT_EQ(Full.umax(Empty), Empty); |
| EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0))); |
| EXPECT_EQ(Full.umax(Wrap), Full); |
| EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0))); |
| EXPECT_EQ(Empty.umax(Empty), Empty); |
| EXPECT_EQ(Empty.umax(Some), Empty); |
| EXPECT_EQ(Empty.umax(Wrap), Empty); |
| EXPECT_EQ(Empty.umax(One), Empty); |
| EXPECT_EQ(Some.umax(Some), Some); |
| EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0))); |
| EXPECT_EQ(Some.umax(One), Some); |
| // TODO: ConstantRange is currently over-conservative here. |
| EXPECT_EQ(Wrap.umax(Wrap), Full); |
| EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0))); |
| EXPECT_EQ(One.umax(One), One); |
| } |
| |
| TEST_F(ConstantRangeTest, SMax) { |
| EXPECT_EQ(Full.smax(Full), Full); |
| EXPECT_EQ(Full.smax(Empty), Empty); |
| EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa), |
| APInt::getSignedMinValue(16))); |
| EXPECT_EQ(Full.smax(Wrap), Full); |
| EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa), |
| APInt::getSignedMinValue(16))); |
| EXPECT_EQ(Empty.smax(Empty), Empty); |
| EXPECT_EQ(Empty.smax(Some), Empty); |
| EXPECT_EQ(Empty.smax(Wrap), Empty); |
| EXPECT_EQ(Empty.smax(One), Empty); |
| EXPECT_EQ(Some.smax(Some), Some); |
| EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa), |
| APInt(16, (uint64_t)INT16_MIN))); |
| EXPECT_EQ(Some.smax(One), Some); |
| EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa), |
| APInt(16, (uint64_t)INT16_MIN))); |
| EXPECT_EQ(One.smax(One), One); |
| } |
| |
| TEST_F(ConstantRangeTest, UMin) { |
| EXPECT_EQ(Full.umin(Full), Full); |
| EXPECT_EQ(Full.umin(Empty), Empty); |
| EXPECT_EQ(Full.umin(Some), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); |
| EXPECT_EQ(Full.umin(Wrap), Full); |
| EXPECT_EQ(Empty.umin(Empty), Empty); |
| EXPECT_EQ(Empty.umin(Some), Empty); |
| EXPECT_EQ(Empty.umin(Wrap), Empty); |
| EXPECT_EQ(Empty.umin(One), Empty); |
| EXPECT_EQ(Some.umin(Some), Some); |
| EXPECT_EQ(Some.umin(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); |
| EXPECT_EQ(Some.umin(One), One); |
| // TODO: ConstantRange is currently over-conservative here. |
| EXPECT_EQ(Wrap.umin(Wrap), Full); |
| EXPECT_EQ(Wrap.umin(One), ConstantRange(APInt(16, 0), APInt(16, 0xb))); |
| EXPECT_EQ(One.umin(One), One); |
| } |
| |
| TEST_F(ConstantRangeTest, SMin) { |
| EXPECT_EQ(Full.smin(Full), Full); |
| EXPECT_EQ(Full.smin(Empty), Empty); |
| EXPECT_EQ(Full.smin(Some), ConstantRange(APInt(16, (uint64_t)INT16_MIN), |
| APInt(16, 0xaaa))); |
| EXPECT_EQ(Full.smin(Wrap), Full); |
| EXPECT_EQ(Empty.smin(Empty), Empty); |
| EXPECT_EQ(Empty.smin(Some), Empty); |
| EXPECT_EQ(Empty.smin(Wrap), Empty); |
| EXPECT_EQ(Empty.smin(One), Empty); |
| EXPECT_EQ(Some.smin(Some), Some); |
| EXPECT_EQ(Some.smin(Wrap), ConstantRange(APInt(16, (uint64_t)INT16_MIN), |
| APInt(16, 0xaaa))); |
| EXPECT_EQ(Some.smin(One), One); |
| // TODO: ConstantRange is currently over-conservative here. |
| EXPECT_EQ(Wrap.smin(Wrap), Full); |
| EXPECT_EQ(Wrap.smin(One), ConstantRange(APInt(16, (uint64_t)INT16_MIN), |
| APInt(16, 0xb))); |
| EXPECT_EQ(One.smin(One), One); |
| } |
| |
| TEST_F(ConstantRangeTest, UDiv) { |
| EXPECT_EQ(Full.udiv(Full), Full); |
| EXPECT_EQ(Full.udiv(Empty), Empty); |
| EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0), |
| APInt(16, 0xffff / 0xa + 1))); |
| EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0), |
| APInt(16, 0xffff / 0xa + 1))); |
| EXPECT_EQ(Full.udiv(Wrap), Full); |
| EXPECT_EQ(Empty.udiv(Empty), Empty); |
| EXPECT_EQ(Empty.udiv(One), Empty); |
| EXPECT_EQ(Empty.udiv(Some), Empty); |
| EXPECT_EQ(Empty.udiv(Wrap), Empty); |
| EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1))); |
| EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2))); |
| EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb))); |
| EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111))); |
| EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); |
| EXPECT_EQ(Wrap.udiv(Wrap), Full); |
| } |
| |
| TEST_F(ConstantRangeTest, Shl) { |
| ConstantRange Some2(APInt(16, 0xfff), APInt(16, 0x8000)); |
| ConstantRange WrapNullMax(APInt(16, 0x1), APInt(16, 0x0)); |
| EXPECT_EQ(Full.shl(Full), Full); |
| EXPECT_EQ(Full.shl(Empty), Empty); |
| EXPECT_EQ(Full.shl(One), Full); // TODO: [0, (-1 << 0xa) + 1) |
| EXPECT_EQ(Full.shl(Some), Full); // TODO: [0, (-1 << 0xa) + 1) |
| EXPECT_EQ(Full.shl(Wrap), Full); |
| EXPECT_EQ(Empty.shl(Empty), Empty); |
| EXPECT_EQ(Empty.shl(One), Empty); |
| EXPECT_EQ(Empty.shl(Some), Empty); |
| EXPECT_EQ(Empty.shl(Wrap), Empty); |
| EXPECT_EQ(One.shl(One), ConstantRange(APInt(16, 0xa << 0xa), |
| APInt(16, (0xa << 0xa) + 1))); |
| EXPECT_EQ(One.shl(Some), Full); // TODO: [0xa << 0xa, 0) |
| EXPECT_EQ(One.shl(Wrap), Full); // TODO: [0xa, 0xa << 14 + 1) |
| EXPECT_EQ(Some.shl(Some), Full); // TODO: [0xa << 0xa, 0xfc01) |
| EXPECT_EQ(Some.shl(Wrap), Full); // TODO: [0xa, 0x7ff << 0x5 + 1) |
| EXPECT_EQ(Wrap.shl(Wrap), Full); |
| EXPECT_EQ( |
| Some2.shl(ConstantRange(APInt(16, 0x1))), |
| ConstantRange(APInt(16, 0xfff << 0x1), APInt(16, 0x7fff << 0x1) + 1)); |
| EXPECT_EQ(One.shl(WrapNullMax), Full); |
| } |
| |
| TEST_F(ConstantRangeTest, Lshr) { |
| EXPECT_EQ(Full.lshr(Full), Full); |
| EXPECT_EQ(Full.lshr(Empty), Empty); |
| EXPECT_EQ(Full.lshr(One), ConstantRange(APInt(16, 0), |
| APInt(16, (0xffff >> 0xa) + 1))); |
| EXPECT_EQ(Full.lshr(Some), ConstantRange(APInt(16, 0), |
| APInt(16, (0xffff >> 0xa) + 1))); |
| EXPECT_EQ(Full.lshr(Wrap), Full); |
| EXPECT_EQ(Empty.lshr(Empty), Empty); |
| EXPECT_EQ(Empty.lshr(One), Empty); |
| EXPECT_EQ(Empty.lshr(Some), Empty); |
| EXPECT_EQ(Empty.lshr(Wrap), Empty); |
| EXPECT_EQ(One.lshr(One), ConstantRange(APInt(16, 0))); |
| EXPECT_EQ(One.lshr(Some), ConstantRange(APInt(16, 0))); |
| EXPECT_EQ(One.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb))); |
| EXPECT_EQ(Some.lshr(Some), ConstantRange(APInt(16, 0), |
| APInt(16, (0xaaa >> 0xa) + 1))); |
| EXPECT_EQ(Some.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); |
| EXPECT_EQ(Wrap.lshr(Wrap), Full); |
| } |
| |
| TEST_F(ConstantRangeTest, Ashr) { |
| EXPECT_EQ(Full.ashr(Full), Full); |
| EXPECT_EQ(Full.ashr(Empty), Empty); |
| EXPECT_EQ(Full.ashr(One), ConstantRange(APInt(16, 0xffe0), |
| APInt(16, (0x7fff >> 0xa) + 1 ))); |
| ConstantRange Small(APInt(16, 0xa), APInt(16, 0xb)); |
| EXPECT_EQ(Full.ashr(Small), ConstantRange(APInt(16, 0xffe0), |
| APInt(16, (0x7fff >> 0xa) + 1 ))); |
| EXPECT_EQ(Full.ashr(Some), ConstantRange(APInt(16, 0xffe0), |
| APInt(16, (0x7fff >> 0xa) + 1 ))); |
| EXPECT_EQ(Full.ashr(Wrap), Full); |
| EXPECT_EQ(Empty.ashr(Empty), Empty); |
| EXPECT_EQ(Empty.ashr(One), Empty); |
| EXPECT_EQ(Empty.ashr(Some), Empty); |
| EXPECT_EQ(Empty.ashr(Wrap), Empty); |
| EXPECT_EQ(One.ashr(One), ConstantRange(APInt(16, 0))); |
| EXPECT_EQ(One.ashr(Some), ConstantRange(APInt(16, 0))); |
| EXPECT_EQ(One.ashr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb))); |
| EXPECT_EQ(Some.ashr(Some), ConstantRange(APInt(16, 0), |
| APInt(16, (0xaaa >> 0xa) + 1))); |
| EXPECT_EQ(Some.ashr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); |
| EXPECT_EQ(Wrap.ashr(Wrap), Full); |
| ConstantRange Neg(APInt(16, 0xf3f0, true), APInt(16, 0xf7f8, true)); |
| EXPECT_EQ(Neg.ashr(Small), ConstantRange(APInt(16, 0xfffc, true), |
| APInt(16, 0xfffe, true))); |
| } |
| |
| TEST(ConstantRange, MakeAllowedICmpRegion) { |
| // PR8250 |
| ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32)); |
| EXPECT_TRUE(ConstantRange::makeAllowedICmpRegion(ICmpInst::ICMP_SGT, SMax) |
| .isEmptySet()); |
| } |
| |
| TEST(ConstantRange, MakeSatisfyingICmpRegion) { |
| ConstantRange LowHalf(APInt(8, 0), APInt(8, 128)); |
| ConstantRange HighHalf(APInt(8, 128), APInt(8, 0)); |
| ConstantRange EmptySet(8, /* isFullSet = */ false); |
| |
| EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_NE, LowHalf), |
| HighHalf); |
| |
| EXPECT_EQ( |
| ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_NE, HighHalf), |
| LowHalf); |
| |
| EXPECT_TRUE(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_EQ, |
| HighHalf).isEmptySet()); |
| |
| ConstantRange UnsignedSample(APInt(8, 5), APInt(8, 200)); |
| |
| EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_ULT, |
| UnsignedSample), |
| ConstantRange(APInt(8, 0), APInt(8, 5))); |
| |
| EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_ULE, |
| UnsignedSample), |
| ConstantRange(APInt(8, 0), APInt(8, 6))); |
| |
| EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_UGT, |
| UnsignedSample), |
| ConstantRange(APInt(8, 200), APInt(8, 0))); |
| |
| EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_UGE, |
| UnsignedSample), |
| ConstantRange(APInt(8, 199), APInt(8, 0))); |
| |
| ConstantRange SignedSample(APInt(8, -5), APInt(8, 5)); |
| |
| EXPECT_EQ( |
| ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SLT, SignedSample), |
| ConstantRange(APInt(8, -128), APInt(8, -5))); |
| |
| EXPECT_EQ( |
| ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SLE, SignedSample), |
| ConstantRange(APInt(8, -128), APInt(8, -4))); |
| |
| EXPECT_EQ( |
| ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SGT, SignedSample), |
| ConstantRange(APInt(8, 5), APInt(8, -128))); |
| |
| EXPECT_EQ( |
| ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SGE, SignedSample), |
| ConstantRange(APInt(8, 4), APInt(8, -128))); |
| } |
| |
| TEST(ConstantRange, MakeGuaranteedNoWrapRegion) { |
| const int IntMin4Bits = 8; |
| const int IntMax4Bits = 7; |
| typedef OverflowingBinaryOperator OBO; |
| |
| for (int Const : {0, -1, -2, 1, 2, IntMin4Bits, IntMax4Bits}) { |
| APInt C(4, Const, true /* = isSigned */); |
| |
| auto NUWRegion = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, C, OBO::NoUnsignedWrap); |
| |
| EXPECT_FALSE(NUWRegion.isEmptySet()); |
| |
| auto NSWRegion = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, C, OBO::NoSignedWrap); |
| |
| EXPECT_FALSE(NSWRegion.isEmptySet()); |
| |
| for (APInt I = NUWRegion.getLower(), E = NUWRegion.getUpper(); I != E; |
| ++I) { |
| bool Overflow = false; |
| (void)I.uadd_ov(C, Overflow); |
| EXPECT_FALSE(Overflow); |
| } |
| |
| for (APInt I = NSWRegion.getLower(), E = NSWRegion.getUpper(); I != E; |
| ++I) { |
| bool Overflow = false; |
| (void)I.sadd_ov(C, Overflow); |
| EXPECT_FALSE(Overflow); |
| } |
| } |
| |
| for (int Const : {0, -1, -2, 1, 2, IntMin4Bits, IntMax4Bits}) { |
| APInt C(4, Const, true /* = isSigned */); |
| |
| auto NUWRegion = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, C, OBO::NoUnsignedWrap); |
| |
| EXPECT_FALSE(NUWRegion.isEmptySet()); |
| |
| auto NSWRegion = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, C, OBO::NoSignedWrap); |
| |
| EXPECT_FALSE(NSWRegion.isEmptySet()); |
| |
| for (APInt I = NUWRegion.getLower(), E = NUWRegion.getUpper(); I != E; |
| ++I) { |
| bool Overflow = false; |
| (void)I.usub_ov(C, Overflow); |
| EXPECT_FALSE(Overflow); |
| } |
| |
| for (APInt I = NSWRegion.getLower(), E = NSWRegion.getUpper(); I != E; |
| ++I) { |
| bool Overflow = false; |
| (void)I.ssub_ov(C, Overflow); |
| EXPECT_FALSE(Overflow); |
| } |
| } |
| |
| auto NSWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, ConstantRange(32, /* isFullSet = */ true), |
| OBO::NoSignedWrap); |
| EXPECT_TRUE(NSWForAllValues.isSingleElement() && |
| NSWForAllValues.getSingleElement()->isMinValue()); |
| |
| NSWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, ConstantRange(32, /* isFullSet = */ true), |
| OBO::NoSignedWrap); |
| EXPECT_TRUE(NSWForAllValues.isSingleElement() && |
| NSWForAllValues.getSingleElement()->isMaxValue()); |
| |
| auto NUWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, ConstantRange(32, /* isFullSet = */ true), |
| OBO::NoUnsignedWrap); |
| EXPECT_TRUE(NUWForAllValues.isSingleElement() && |
| NUWForAllValues.getSingleElement()->isMinValue()); |
| |
| NUWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, ConstantRange(32, /* isFullSet = */ true), |
| OBO::NoUnsignedWrap); |
| EXPECT_TRUE(NUWForAllValues.isSingleElement() && |
| NUWForAllValues.getSingleElement()->isMaxValue()); |
| |
| EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, APInt(32, 0), OBO::NoUnsignedWrap).isFullSet()); |
| EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, APInt(32, 0), OBO::NoSignedWrap).isFullSet()); |
| EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, APInt(32, 0), OBO::NoUnsignedWrap).isFullSet()); |
| EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, APInt(32, 0), OBO::NoSignedWrap).isFullSet()); |
| |
| ConstantRange OneToFive(APInt(32, 1), APInt(32, 6)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, OneToFive, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32), |
| APInt::getSignedMaxValue(32) - 4)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, OneToFive, OBO::NoUnsignedWrap), |
| ConstantRange(APInt::getMinValue(32), APInt::getMinValue(32) - 5)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, OneToFive, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32) + 5, |
| APInt::getSignedMinValue(32))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, OneToFive, OBO::NoUnsignedWrap), |
| ConstantRange(APInt::getMinValue(32) + 5, APInt::getMinValue(32))); |
| |
| ConstantRange MinusFiveToMinusTwo(APInt(32, -5), APInt(32, -1)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, MinusFiveToMinusTwo, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32) + 5, |
| APInt::getSignedMinValue(32))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, MinusFiveToMinusTwo, OBO::NoUnsignedWrap), |
| ConstantRange(APInt(32, 0), APInt(32, 2))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, MinusFiveToMinusTwo, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32), |
| APInt::getSignedMaxValue(32) - 4)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, MinusFiveToMinusTwo, OBO::NoUnsignedWrap), |
| ConstantRange(APInt::getMaxValue(32) - 1, |
| APInt::getMinValue(32))); |
| |
| ConstantRange MinusOneToOne(APInt(32, -1), APInt(32, 2)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, MinusOneToOne, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32) + 1, |
| APInt::getSignedMinValue(32) - 1)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, MinusOneToOne, OBO::NoUnsignedWrap), |
| ConstantRange(APInt(32, 0), APInt(32, 1))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, MinusOneToOne, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32) + 1, |
| APInt::getSignedMinValue(32) - 1)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, MinusOneToOne, OBO::NoUnsignedWrap), |
| ConstantRange(APInt::getMaxValue(32), |
| APInt::getMinValue(32))); |
| |
| ConstantRange One(APInt(32, 1), APInt(32, 2)); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, One, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32), |
| APInt::getSignedMaxValue(32))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Add, One, OBO::NoUnsignedWrap), |
| ConstantRange(APInt::getMinValue(32), APInt::getMaxValue(32))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, One, OBO::NoSignedWrap), |
| ConstantRange(APInt::getSignedMinValue(32) + 1, |
| APInt::getSignedMinValue(32))); |
| EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Sub, One, OBO::NoUnsignedWrap), |
| ConstantRange(APInt::getMinValue(32) + 1, APInt::getMinValue(32))); |
| } |
| |
| template<typename Fn> |
| void TestNoWrapRegionExhaustive(Instruction::BinaryOps BinOp, |
| unsigned NoWrapKind, Fn OverflowFn) { |
| // When using 4 bits this test needs ~3s on a debug build. |
| unsigned Bits = 3; |
| EnumerateTwoConstantRanges(Bits, |
| [&](const ConstantRange &CR1, const ConstantRange &CR2) { |
| if (CR2.isEmptySet()) |
| return; |
| |
| ConstantRange NoWrap = |
| ConstantRange::makeGuaranteedNoWrapRegion(BinOp, CR2, NoWrapKind); |
| ForeachNumInConstantRange(CR1, [&](const APInt &N1) { |
| bool NoOverflow = true; |
| ForeachNumInConstantRange(CR2, [&](const APInt &N2) { |
| if (OverflowFn(N1, N2)) |
| NoOverflow = false; |
| }); |
| EXPECT_EQ(NoOverflow, NoWrap.contains(N1)); |
| }); |
| }); |
| } |
| |
| // Show that makeGuaranteedNoWrapRegion is precise if only one of |
| // NoUnsignedWrap or NoSignedWrap is used. |
| TEST(ConstantRange, NoWrapRegionExhaustive) { |
| TestNoWrapRegionExhaustive( |
| Instruction::Add, OverflowingBinaryOperator::NoUnsignedWrap, |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.uadd_ov(N2, Overflow); |
| return Overflow; |
| }); |
| TestNoWrapRegionExhaustive( |
| Instruction::Add, OverflowingBinaryOperator::NoSignedWrap, |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.sadd_ov(N2, Overflow); |
| return Overflow; |
| }); |
| TestNoWrapRegionExhaustive( |
| Instruction::Sub, OverflowingBinaryOperator::NoUnsignedWrap, |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.usub_ov(N2, Overflow); |
| return Overflow; |
| }); |
| TestNoWrapRegionExhaustive( |
| Instruction::Sub, OverflowingBinaryOperator::NoSignedWrap, |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.ssub_ov(N2, Overflow); |
| return Overflow; |
| }); |
| TestNoWrapRegionExhaustive( |
| Instruction::Mul, OverflowingBinaryOperator::NoUnsignedWrap, |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.umul_ov(N2, Overflow); |
| return Overflow; |
| }); |
| TestNoWrapRegionExhaustive( |
| Instruction::Mul, OverflowingBinaryOperator::NoSignedWrap, |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.smul_ov(N2, Overflow); |
| return Overflow; |
| }); |
| } |
| |
| TEST(ConstantRange, GetEquivalentICmp) { |
| APInt RHS; |
| CmpInst::Predicate Pred; |
| |
| EXPECT_TRUE(ConstantRange(APInt::getMinValue(32), APInt(32, 100)) |
| .getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_ULT); |
| EXPECT_EQ(RHS, APInt(32, 100)); |
| |
| EXPECT_TRUE(ConstantRange(APInt::getSignedMinValue(32), APInt(32, 100)) |
| .getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_SLT); |
| EXPECT_EQ(RHS, APInt(32, 100)); |
| |
| EXPECT_TRUE(ConstantRange(APInt(32, 100), APInt::getMinValue(32)) |
| .getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_UGE); |
| EXPECT_EQ(RHS, APInt(32, 100)); |
| |
| EXPECT_TRUE(ConstantRange(APInt(32, 100), APInt::getSignedMinValue(32)) |
| .getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_SGE); |
| EXPECT_EQ(RHS, APInt(32, 100)); |
| |
| EXPECT_TRUE( |
| ConstantRange(32, /*isFullSet=*/true).getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_UGE); |
| EXPECT_EQ(RHS, APInt(32, 0)); |
| |
| EXPECT_TRUE( |
| ConstantRange(32, /*isFullSet=*/false).getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_ULT); |
| EXPECT_EQ(RHS, APInt(32, 0)); |
| |
| EXPECT_FALSE(ConstantRange(APInt(32, 100), APInt(32, 200)) |
| .getEquivalentICmp(Pred, RHS)); |
| |
| EXPECT_FALSE(ConstantRange(APInt::getSignedMinValue(32) - APInt(32, 100), |
| APInt::getSignedMinValue(32) + APInt(32, 100)) |
| .getEquivalentICmp(Pred, RHS)); |
| |
| EXPECT_FALSE(ConstantRange(APInt::getMinValue(32) - APInt(32, 100), |
| APInt::getMinValue(32) + APInt(32, 100)) |
| .getEquivalentICmp(Pred, RHS)); |
| |
| EXPECT_TRUE(ConstantRange(APInt(32, 100)).getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_EQ); |
| EXPECT_EQ(RHS, APInt(32, 100)); |
| |
| EXPECT_TRUE( |
| ConstantRange(APInt(32, 100)).inverse().getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_NE); |
| EXPECT_EQ(RHS, APInt(32, 100)); |
| |
| EXPECT_TRUE( |
| ConstantRange(APInt(512, 100)).inverse().getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_NE); |
| EXPECT_EQ(RHS, APInt(512, 100)); |
| |
| // NB! It would be correct for the following four calls to getEquivalentICmp |
| // to return ordered predicates like CmpInst::ICMP_ULT or CmpInst::ICMP_UGT. |
| // However, that's not the case today. |
| |
| EXPECT_TRUE(ConstantRange(APInt(32, 0)).getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_EQ); |
| EXPECT_EQ(RHS, APInt(32, 0)); |
| |
| EXPECT_TRUE( |
| ConstantRange(APInt(32, 0)).inverse().getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_NE); |
| EXPECT_EQ(RHS, APInt(32, 0)); |
| |
| EXPECT_TRUE(ConstantRange(APInt(32, -1)).getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_EQ); |
| EXPECT_EQ(RHS, APInt(32, -1)); |
| |
| EXPECT_TRUE( |
| ConstantRange(APInt(32, -1)).inverse().getEquivalentICmp(Pred, RHS)); |
| EXPECT_EQ(Pred, CmpInst::ICMP_NE); |
| EXPECT_EQ(RHS, APInt(32, -1)); |
| } |
| |
| TEST(ConstantRange, MakeGuaranteedNoWrapRegionMulUnsignedSingleValue) { |
| typedef OverflowingBinaryOperator OBO; |
| |
| for (uint64_t I = std::numeric_limits<uint8_t>::min(); |
| I <= std::numeric_limits<uint8_t>::max(); I++) { |
| auto Range = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Mul, ConstantRange(APInt(8, I), APInt(8, I + 1)), |
| OBO::NoUnsignedWrap); |
| |
| for (uint64_t V = std::numeric_limits<uint8_t>::min(); |
| V <= std::numeric_limits<uint8_t>::max(); V++) { |
| bool Overflow; |
| (void)APInt(8, I).umul_ov(APInt(8, V), Overflow); |
| EXPECT_EQ(!Overflow, Range.contains(APInt(8, V))); |
| } |
| } |
| } |
| |
| TEST(ConstantRange, MakeGuaranteedNoWrapRegionMulSignedSingleValue) { |
| typedef OverflowingBinaryOperator OBO; |
| |
| for (int64_t I = std::numeric_limits<int8_t>::min(); |
| I <= std::numeric_limits<int8_t>::max(); I++) { |
| auto Range = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Mul, |
| ConstantRange(APInt(8, I, /*isSigned=*/true), |
| APInt(8, I + 1, /*isSigned=*/true)), |
| OBO::NoSignedWrap); |
| |
| for (int64_t V = std::numeric_limits<int8_t>::min(); |
| V <= std::numeric_limits<int8_t>::max(); V++) { |
| bool Overflow; |
| (void)APInt(8, I, /*isSigned=*/true) |
| .smul_ov(APInt(8, V, /*isSigned=*/true), Overflow); |
| EXPECT_EQ(!Overflow, Range.contains(APInt(8, V, /*isSigned=*/true))); |
| } |
| } |
| } |
| |
| TEST(ConstantRange, MakeGuaranteedNoWrapRegionMulUnsignedRange) { |
| typedef OverflowingBinaryOperator OBO; |
| |
| for (uint64_t Lo = std::numeric_limits<uint8_t>::min(); |
| Lo <= std::numeric_limits<uint8_t>::max(); Lo++) { |
| for (uint64_t Hi = Lo; Hi <= std::numeric_limits<uint8_t>::max(); Hi++) { |
| EXPECT_EQ( |
| ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Mul, ConstantRange(APInt(8, Lo), APInt(8, Hi + 1)), |
| OBO::NoUnsignedWrap), |
| ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Mul, ConstantRange(APInt(8, Hi), APInt(8, Hi + 1)), |
| OBO::NoUnsignedWrap)); |
| } |
| } |
| } |
| |
| TEST(ConstantRange, MakeGuaranteedNoWrapRegionMulSignedRange) { |
| typedef OverflowingBinaryOperator OBO; |
| |
| int Lo = -12, Hi = 16; |
| auto Range = ConstantRange::makeGuaranteedNoWrapRegion( |
| Instruction::Mul, |
| ConstantRange(APInt(8, Lo, /*isSigned=*/true), |
| APInt(8, Hi + 1, /*isSigned=*/true)), |
| OBO::NoSignedWrap); |
| |
| for (int64_t V = std::numeric_limits<int8_t>::min(); |
| V <= std::numeric_limits<int8_t>::max(); V++) { |
| bool AnyOverflow = false; |
| for (int64_t I = Lo; I <= Hi; I++) { |
| bool Overflow; |
| (void)APInt(8, I, /*isSigned=*/true) |
| .smul_ov(APInt(8, V, /*isSigned=*/true), Overflow); |
| AnyOverflow |= Overflow; |
| } |
| EXPECT_EQ(!AnyOverflow, Range.contains(APInt(8, V, /*isSigned=*/true))); |
| } |
| } |
| |
| #define EXPECT_MAY_OVERFLOW(op) \ |
| EXPECT_EQ(ConstantRange::OverflowResult::MayOverflow, (op)) |
| #define EXPECT_ALWAYS_OVERFLOWS(op) \ |
| EXPECT_EQ(ConstantRange::OverflowResult::AlwaysOverflows, (op)) |
| #define EXPECT_NEVER_OVERFLOWS(op) \ |
| EXPECT_EQ(ConstantRange::OverflowResult::NeverOverflows, (op)) |
| |
| TEST_F(ConstantRangeTest, UnsignedAddOverflow) { |
| // Ill-defined - may overflow is a conservative result. |
| EXPECT_MAY_OVERFLOW(Some.unsignedAddMayOverflow(Empty)); |
| EXPECT_MAY_OVERFLOW(Empty.unsignedAddMayOverflow(Some)); |
| |
| // Never overflow despite one full/wrap set. |
| ConstantRange Zero(APInt::getNullValue(16)); |
| EXPECT_NEVER_OVERFLOWS(Full.unsignedAddMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Wrap.unsignedAddMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Zero.unsignedAddMayOverflow(Full)); |
| EXPECT_NEVER_OVERFLOWS(Zero.unsignedAddMayOverflow(Wrap)); |
| |
| // But usually full/wrap always may overflow. |
| EXPECT_MAY_OVERFLOW(Full.unsignedAddMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(Wrap.unsignedAddMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(One.unsignedAddMayOverflow(Full)); |
| EXPECT_MAY_OVERFLOW(One.unsignedAddMayOverflow(Wrap)); |
| |
| ConstantRange A(APInt(16, 0xfd00), APInt(16, 0xfe00)); |
| ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201)); |
| ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202)); |
| EXPECT_NEVER_OVERFLOWS(A.unsignedAddMayOverflow(B1)); |
| EXPECT_MAY_OVERFLOW(A.unsignedAddMayOverflow(B2)); |
| EXPECT_NEVER_OVERFLOWS(B1.unsignedAddMayOverflow(A)); |
| EXPECT_MAY_OVERFLOW(B2.unsignedAddMayOverflow(A)); |
| |
| ConstantRange C1(APInt(16, 0x0299), APInt(16, 0x0400)); |
| ConstantRange C2(APInt(16, 0x0300), APInt(16, 0x0400)); |
| EXPECT_MAY_OVERFLOW(A.unsignedAddMayOverflow(C1)); |
| EXPECT_ALWAYS_OVERFLOWS(A.unsignedAddMayOverflow(C2)); |
| EXPECT_MAY_OVERFLOW(C1.unsignedAddMayOverflow(A)); |
| EXPECT_ALWAYS_OVERFLOWS(C2.unsignedAddMayOverflow(A)); |
| } |
| |
| TEST_F(ConstantRangeTest, UnsignedSubOverflow) { |
| // Ill-defined - may overflow is a conservative result. |
| EXPECT_MAY_OVERFLOW(Some.unsignedSubMayOverflow(Empty)); |
| EXPECT_MAY_OVERFLOW(Empty.unsignedSubMayOverflow(Some)); |
| |
| // Never overflow despite one full/wrap set. |
| ConstantRange Zero(APInt::getNullValue(16)); |
| ConstantRange Max(APInt::getAllOnesValue(16)); |
| EXPECT_NEVER_OVERFLOWS(Full.unsignedSubMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Wrap.unsignedSubMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Max.unsignedSubMayOverflow(Full)); |
| EXPECT_NEVER_OVERFLOWS(Max.unsignedSubMayOverflow(Wrap)); |
| |
| // But usually full/wrap always may overflow. |
| EXPECT_MAY_OVERFLOW(Full.unsignedSubMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(Wrap.unsignedSubMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(One.unsignedSubMayOverflow(Full)); |
| EXPECT_MAY_OVERFLOW(One.unsignedSubMayOverflow(Wrap)); |
| |
| ConstantRange A(APInt(16, 0x0000), APInt(16, 0x0100)); |
| ConstantRange B(APInt(16, 0x0100), APInt(16, 0x0200)); |
| EXPECT_NEVER_OVERFLOWS(B.unsignedSubMayOverflow(A)); |
| EXPECT_ALWAYS_OVERFLOWS(A.unsignedSubMayOverflow(B)); |
| |
| ConstantRange A1(APInt(16, 0x0000), APInt(16, 0x0101)); |
| ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201)); |
| EXPECT_NEVER_OVERFLOWS(B1.unsignedSubMayOverflow(A1)); |
| EXPECT_MAY_OVERFLOW(A1.unsignedSubMayOverflow(B1)); |
| |
| ConstantRange A2(APInt(16, 0x0000), APInt(16, 0x0102)); |
| ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202)); |
| EXPECT_MAY_OVERFLOW(B2.unsignedSubMayOverflow(A2)); |
| EXPECT_MAY_OVERFLOW(A2.unsignedSubMayOverflow(B2)); |
| } |
| |
| TEST_F(ConstantRangeTest, SignedAddOverflow) { |
| // Ill-defined - may overflow is a conservative result. |
| EXPECT_MAY_OVERFLOW(Some.signedAddMayOverflow(Empty)); |
| EXPECT_MAY_OVERFLOW(Empty.signedAddMayOverflow(Some)); |
| |
| // Never overflow despite one full/wrap set. |
| ConstantRange Zero(APInt::getNullValue(16)); |
| EXPECT_NEVER_OVERFLOWS(Full.signedAddMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Wrap.signedAddMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Zero.signedAddMayOverflow(Full)); |
| EXPECT_NEVER_OVERFLOWS(Zero.signedAddMayOverflow(Wrap)); |
| |
| // But usually full/wrap always may overflow. |
| EXPECT_MAY_OVERFLOW(Full.signedAddMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(Wrap.signedAddMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(One.signedAddMayOverflow(Full)); |
| EXPECT_MAY_OVERFLOW(One.signedAddMayOverflow(Wrap)); |
| |
| ConstantRange A(APInt(16, 0x7d00), APInt(16, 0x7e00)); |
| ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201)); |
| ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202)); |
| EXPECT_NEVER_OVERFLOWS(A.signedAddMayOverflow(B1)); |
| EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B2)); |
| ConstantRange B3(APInt(16, 0x8000), APInt(16, 0x0201)); |
| ConstantRange B4(APInt(16, 0x8000), APInt(16, 0x0202)); |
| EXPECT_NEVER_OVERFLOWS(A.signedAddMayOverflow(B3)); |
| EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B4)); |
| ConstantRange B5(APInt(16, 0x0299), APInt(16, 0x0400)); |
| ConstantRange B6(APInt(16, 0x0300), APInt(16, 0x0400)); |
| EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B5)); |
| EXPECT_ALWAYS_OVERFLOWS(A.signedAddMayOverflow(B6)); |
| |
| ConstantRange C(APInt(16, 0x8200), APInt(16, 0x8300)); |
| ConstantRange D1(APInt(16, 0xfe00), APInt(16, 0xff00)); |
| ConstantRange D2(APInt(16, 0xfd99), APInt(16, 0xff00)); |
| EXPECT_NEVER_OVERFLOWS(C.signedAddMayOverflow(D1)); |
| EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D2)); |
| ConstantRange D3(APInt(16, 0xfe00), APInt(16, 0x8000)); |
| ConstantRange D4(APInt(16, 0xfd99), APInt(16, 0x8000)); |
| EXPECT_NEVER_OVERFLOWS(C.signedAddMayOverflow(D3)); |
| EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D4)); |
| ConstantRange D5(APInt(16, 0xfc00), APInt(16, 0xfd02)); |
| ConstantRange D6(APInt(16, 0xfc00), APInt(16, 0xfd01)); |
| EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D5)); |
| EXPECT_ALWAYS_OVERFLOWS(C.signedAddMayOverflow(D6)); |
| |
| ConstantRange E(APInt(16, 0xff00), APInt(16, 0x0100)); |
| EXPECT_NEVER_OVERFLOWS(E.signedAddMayOverflow(E)); |
| ConstantRange F(APInt(16, 0xf000), APInt(16, 0x7000)); |
| EXPECT_MAY_OVERFLOW(F.signedAddMayOverflow(F)); |
| } |
| |
| TEST_F(ConstantRangeTest, SignedSubOverflow) { |
| // Ill-defined - may overflow is a conservative result. |
| EXPECT_MAY_OVERFLOW(Some.signedSubMayOverflow(Empty)); |
| EXPECT_MAY_OVERFLOW(Empty.signedSubMayOverflow(Some)); |
| |
| // Never overflow despite one full/wrap set. |
| ConstantRange Zero(APInt::getNullValue(16)); |
| EXPECT_NEVER_OVERFLOWS(Full.signedSubMayOverflow(Zero)); |
| EXPECT_NEVER_OVERFLOWS(Wrap.signedSubMayOverflow(Zero)); |
| |
| // But usually full/wrap always may overflow. |
| EXPECT_MAY_OVERFLOW(Full.signedSubMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(Wrap.signedSubMayOverflow(One)); |
| EXPECT_MAY_OVERFLOW(One.signedSubMayOverflow(Full)); |
| EXPECT_MAY_OVERFLOW(One.signedSubMayOverflow(Wrap)); |
| |
| ConstantRange A(APInt(16, 0x7d00), APInt(16, 0x7e00)); |
| ConstantRange B1(APInt(16, 0xfe00), APInt(16, 0xff00)); |
| ConstantRange B2(APInt(16, 0xfd99), APInt(16, 0xff00)); |
| EXPECT_NEVER_OVERFLOWS(A.signedSubMayOverflow(B1)); |
| EXPECT_MAY_OVERFLOW(A.signedSubMayOverflow(B2)); |
| ConstantRange B3(APInt(16, 0xfc00), APInt(16, 0xfd02)); |
| ConstantRange B4(APInt(16, 0xfc00), APInt(16, 0xfd01)); |
| EXPECT_MAY_OVERFLOW(A.signedSubMayOverflow(B3)); |
| EXPECT_ALWAYS_OVERFLOWS(A.signedSubMayOverflow(B4)); |
| |
| ConstantRange C(APInt(16, 0x8200), APInt(16, 0x8300)); |
| ConstantRange D1(APInt(16, 0x0100), APInt(16, 0x0201)); |
| ConstantRange D2(APInt(16, 0x0100), APInt(16, 0x0202)); |
| EXPECT_NEVER_OVERFLOWS(C.signedSubMayOverflow(D1)); |
| EXPECT_MAY_OVERFLOW(C.signedSubMayOverflow(D2)); |
| ConstantRange D3(APInt(16, 0x0299), APInt(16, 0x0400)); |
| ConstantRange D4(APInt(16, 0x0300), APInt(16, 0x0400)); |
| EXPECT_MAY_OVERFLOW(C.signedSubMayOverflow(D3)); |
| EXPECT_ALWAYS_OVERFLOWS(C.signedSubMayOverflow(D4)); |
| |
| ConstantRange E(APInt(16, 0xff00), APInt(16, 0x0100)); |
| EXPECT_NEVER_OVERFLOWS(E.signedSubMayOverflow(E)); |
| ConstantRange F(APInt(16, 0xf000), APInt(16, 0x7001)); |
| EXPECT_MAY_OVERFLOW(F.signedSubMayOverflow(F)); |
| } |
| |
| template<typename Fn1, typename Fn2> |
| static void TestOverflowExhaustive(Fn1 OverflowFn, Fn2 MayOverflowFn) { |
| // Constant range overflow checks are tested exhaustively on 4-bit numbers. |
| unsigned Bits = 4; |
| EnumerateTwoConstantRanges(Bits, [=](const ConstantRange &CR1, |
| const ConstantRange &CR2) { |
| // Loop over all N1 in CR1 and N2 in CR2 and check whether any of the |
| // operations have overflow / have no overflow. |
| bool RangeHasOverflow = false; |
| bool RangeHasNoOverflow = false; |
| ForeachNumInConstantRange(CR1, [&](const APInt &N1) { |
| ForeachNumInConstantRange(CR2, [&](const APInt &N2) { |
| if (OverflowFn(N1, N2)) |
| RangeHasOverflow = true; |
| else |
| RangeHasNoOverflow = true; |
| }); |
| }); |
| |
| ConstantRange::OverflowResult OR = MayOverflowFn(CR1, CR2); |
| switch (OR) { |
| case ConstantRange::OverflowResult::AlwaysOverflows: |
| EXPECT_TRUE(RangeHasOverflow); |
| EXPECT_FALSE(RangeHasNoOverflow); |
| break; |
| case ConstantRange::OverflowResult::NeverOverflows: |
| EXPECT_FALSE(RangeHasOverflow); |
| EXPECT_TRUE(RangeHasNoOverflow); |
| break; |
| case ConstantRange::OverflowResult::MayOverflow: |
| // We return MayOverflow for empty sets as a conservative result, |
| // but of course neither the RangeHasOverflow nor the |
| // RangeHasNoOverflow flags will be set. |
| if (CR1.isEmptySet() || CR2.isEmptySet()) |
| break; |
| |
| EXPECT_TRUE(RangeHasOverflow); |
| EXPECT_TRUE(RangeHasNoOverflow); |
| break; |
| } |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, UnsignedAddOverflowExhaustive) { |
| TestOverflowExhaustive( |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.uadd_ov(N2, Overflow); |
| return Overflow; |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2) { |
| return CR1.unsignedAddMayOverflow(CR2); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, UnsignedSubOverflowExhaustive) { |
| TestOverflowExhaustive( |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.usub_ov(N2, Overflow); |
| return Overflow; |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2) { |
| return CR1.unsignedSubMayOverflow(CR2); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, UnsignedMulOverflowExhaustive) { |
| TestOverflowExhaustive( |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.umul_ov(N2, Overflow); |
| return Overflow; |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2) { |
| return CR1.unsignedMulMayOverflow(CR2); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, SignedAddOverflowExhaustive) { |
| TestOverflowExhaustive( |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.sadd_ov(N2, Overflow); |
| return Overflow; |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2) { |
| return CR1.signedAddMayOverflow(CR2); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, SignedSubOverflowExhaustive) { |
| TestOverflowExhaustive( |
| [](const APInt &N1, const APInt &N2) { |
| bool Overflow; |
| (void) N1.ssub_ov(N2, Overflow); |
| return Overflow; |
| }, |
| [](const ConstantRange &CR1, const ConstantRange &CR2) { |
| return CR1.signedSubMayOverflow(CR2); |
| }); |
| } |
| |
| TEST_F(ConstantRangeTest, FromKnownBits) { |
| KnownBits Unknown(16); |
| EXPECT_EQ(Full, ConstantRange::fromKnownBits(Unknown, /*signed*/false)); |
| EXPECT_EQ(Full, ConstantRange::fromKnownBits(Unknown, /*signed*/true)); |
| |
| // .10..01. -> unsigned 01000010 (66) to 11011011 (219) |
| // -> signed 11000010 (194) to 01011011 (91) |
| KnownBits Known(8); |
| Known.Zero = 36; |
| Known.One = 66; |
| ConstantRange Unsigned(APInt(8, 66), APInt(8, 219 + 1)); |
| ConstantRange Signed(APInt(8, 194), APInt(8, 91 + 1)); |
| EXPECT_EQ(Unsigned, ConstantRange::fromKnownBits(Known, /*signed*/false)); |
| EXPECT_EQ(Signed, ConstantRange::fromKnownBits(Known, /*signed*/true)); |
| |
| // 1.10.10. -> 10100100 (164) to 11101101 (237) |
| Known.Zero = 18; |
| Known.One = 164; |
| ConstantRange CR1(APInt(8, 164), APInt(8, 237 + 1)); |
| EXPECT_EQ(CR1, ConstantRange::fromKnownBits(Known, /*signed*/false)); |
| EXPECT_EQ(CR1, ConstantRange::fromKnownBits(Known, /*signed*/true)); |
| |
| // 01.0.1.0 -> 01000100 (68) to 01101110 (110) |
| Known.Zero = 145; |
| Known.One = 68; |
| ConstantRange CR2(APInt(8, 68), APInt(8, 110 + 1)); |
| EXPECT_EQ(CR2, ConstantRange::fromKnownBits(Known, /*signed*/false)); |
| EXPECT_EQ(CR2, ConstantRange::fromKnownBits(Known, /*signed*/true)); |
| } |
| |
| TEST_F(ConstantRangeTest, FromKnownBitsExhaustive) { |
| unsigned Bits = 4; |
| unsigned Max = 1 << Bits; |
| KnownBits Known(Bits); |
| for (unsigned Zero = 0; Zero < Max; ++Zero) { |
| for (unsigned One = 0; One < Max; ++One) { |
| Known.Zero = Zero; |
| Known.One = One; |
| if (Known.hasConflict() || Known.isUnknown()) |
| continue; |
| |
| APInt MinUnsigned = APInt::getMaxValue(Bits); |
| APInt MaxUnsigned = APInt::getMinValue(Bits); |
| APInt MinSigned = APInt::getSignedMaxValue(Bits); |
| APInt MaxSigned = APInt::getSignedMinValue(Bits); |
| for (unsigned N = 0; N < Max; ++N) { |
| APInt Num(Bits, N); |
| if ((Num & Known.Zero) != 0 || (~Num & Known.One) != 0) |
| continue; |
| |
| if (Num.ult(MinUnsigned)) MinUnsigned = Num; |
| if (Num.ugt(MaxUnsigned)) MaxUnsigned = Num; |
| if (Num.slt(MinSigned)) MinSigned = Num; |
| if (Num.sgt(MaxSigned)) MaxSigned = Num; |
| } |
| |
| ConstantRange UnsignedCR(MinUnsigned, MaxUnsigned + 1); |
| ConstantRange SignedCR(MinSigned, MaxSigned + 1); |
| EXPECT_EQ(UnsignedCR, ConstantRange::fromKnownBits(Known, false)); |
| EXPECT_EQ(SignedCR, ConstantRange::fromKnownBits(Known, true)); |
| } |
| } |
| } |
| |
| TEST_F(ConstantRangeTest, Negative) { |
| // All elements in an empty set (of which there are none) are both negative |
| // and non-negative. Empty & full sets checked explicitly for clarity, but |
| // they are also covered by the exhaustive test below. |
| EXPECT_TRUE(Empty.isAllNegative()); |
| EXPECT_TRUE(Empty.isAllNonNegative()); |
| EXPECT_FALSE(Full.isAllNegative()); |
| EXPECT_FALSE(Full.isAllNonNegative()); |
| |
| unsigned Bits = 4; |
| EnumerateConstantRanges(Bits, [](const ConstantRange &CR) { |
| bool AllNegative = true; |
| bool AllNonNegative = true; |
| ForeachNumInConstantRange(CR, [&](const APInt &N) { |
| if (!N.isNegative()) |
| AllNegative = false; |
| if (!N.isNonNegative()) |
| AllNonNegative = false; |
| }); |
| assert((CR.isEmptySet() || !AllNegative || !AllNonNegative) && |
| "Only empty set can be both all negative and all non-negative"); |
| |
| EXPECT_EQ(AllNegative, CR.isAllNegative()); |
| EXPECT_EQ(AllNonNegative, CR.isAllNonNegative()); |
| }); |
| } |
| |
| } // anonymous namespace |
