[Modules] Move the ConstantRange class into the IR library. This is

a bit surprising, as the class is almost entirely abstracted away from
any particular IR, however it encodes the comparsion predicates which
mutate ranges as ICmp predicate codes. This is reasonable as they're
used for both instructions and constants. Thus, it belongs in the IR
library with instructions and constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202838 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 513 insertions, 0 deletions

diff --git a/unittests/IR/CMakeLists.txt b/unittests/IR/CMakeLists.txt
index fd8d842c80..e1c295d0be 100644
--- a/unittests/IR/CMakeLists.txt
+++ b/unittests/IR/CMakeLists.txt
@@ -8,6 +8,7 @@ set(LLVM_LINK_COMPONENTS
 
 set(IRSources
   AttributesTest.cpp
+  ConstantRangeTest.cpp
   ConstantsTest.cpp
   DominatorTreeTest.cpp
   IRBuilderTest.cpp
diff --git a/unittests/IR/ConstantRangeTest.cpp b/unittests/IR/ConstantRangeTest.cpp
new file mode 100644
index 0000000000..cdf7378c17
--- /dev/null
+++ b/unittests/IR/ConstantRangeTest.cpp
@@ -0,0 +1,512 @@
+//===- ConstantRangeTest.cpp - ConstantRange tests ------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/ConstantRange.h"
+#include "llvm/IR/Instructions.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;
+};
+
+ConstantRange ConstantRangeTest::Full(16);
+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 *>(NULL));
+  EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(NULL));
+  EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
+  EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(NULL));
+  EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(NULL));
+
+  EXPECT_FALSE(Full.isSingleElement());
+  EXPECT_FALSE(Empty.isSingleElement());
+  EXPECT_TRUE(One.isSingleElement());
+  EXPECT_FALSE(Some.isSingleElement());
+  EXPECT_FALSE(Wrap.isSingleElement());
+}
+
+TEST_F(ConstantRangeTest, GetSetSize) {
+  EXPECT_EQ(Full.getSetSize(), APInt(17, 65536));
+  EXPECT_EQ(Empty.getSetSize(), APInt(17, 0));
+  EXPECT_EQ(One.getSetSize(), APInt(17, 1));
+  EXPECT_EQ(Some.getSetSize(), APInt(17, 0xaa0));
+
+  ConstantRange Wrap(APInt(4, 7), APInt(4, 3));
+  ConstantRange Wrap2(APInt(4, 8), APInt(4, 7));
+  EXPECT_EQ(Wrap.getSetSize(), APInt(5, 12));
+  EXPECT_EQ(Wrap2.getSetSize(), APInt(5, 15));
+}
+
+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_TRUE(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, 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());
+}
+
+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)));
+}
+
+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(16));
+  EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith(
+                                    ConstantRange(APInt(16, 2), APInt(16, 1))),
+              ConstantRange(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, 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));
+}
+
+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, 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) {
+  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);
+}
+
+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(ConstantRange, MakeICmpRegion) {
+  // PR8250
+  ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32));
+  EXPECT_TRUE(ConstantRange::makeICmpRegion(ICmpInst::ICMP_SGT,
+                                            SMax).isEmptySet());
+}
+
+}  // anonymous namespace