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Clean up ConstantRange a bit:

Browse Source 
- remove ashr which never worked.
 - fix lshr and shl and add tests.
 - remove dead function "intersect1Wrapped".
 - add a new sub method to subtract ranges, with test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110861 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2010-08-11 22:04:36 +00:00
parent 4fd393cc26
commit 7f9ef4bb51
3 changed files with 127 additions and 98 deletions
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66
unittests/Support/ConstantRangeTest.cpp
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@ -259,11 +259,31 @@ TEST_F(ConstantRangeTest, Add) {
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)));
ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
EXPECT_EQ(Wrap.add(APInt(16, 4)),
ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
EXPECT_EQ(One.add(APInt(16, 4)),
ConstantRange(APInt(16, 0xe)));
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(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) {
@ -351,4 +371,44 @@ TEST_F(ConstantRangeTest, UDiv) {
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);
}
} // anonymous namespace