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add ConstantRange::difference (to perform set difference/relative complement)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159352 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nuno Lopes
2012-06-28 16:10:13 +00:00
parent ceb5bc7df1
commit 62d7afad8f
3 changed files with 27 additions and 0 deletions
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17
unittests/Support/ConstantRangeTest.cpp
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@ -289,6 +289,23 @@ TEST_F(ConstantRangeTest, UnionWith) {
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);