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Fix handling of max and full set.

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A full set is a constant range that represents any number. If you take the
umax of that and [5, 10) you end up with [5, INT_MAX] because the values less
than 5 would be umax's against a value which is at least 5.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75372 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2009-07-11 19:22:21 +00:00
parent d7073db1af
commit 646ca92bfc
2 changed files with 8 additions and 11 deletions
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15
unittests/Support/ConstantRangeTest.cpp
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@ -184,7 +184,6 @@ TEST_F(ConstantRangeTest, SExt) {
APInt(Some.getUpper()).sext(20)));
EXPECT_EQ(SWrap, ConstantRange(APInt(Wrap.getLower()).sext(20),
APInt(Wrap.getUpper()).sext(20)));
}
TEST_F(ConstantRangeTest, IntersectWith) {
@ -285,9 +284,9 @@ TEST_F(ConstantRangeTest, Multiply) {
TEST_F(ConstantRangeTest, UMax) {
EXPECT_TRUE(Full.umax(Full).isFullSet());
EXPECT_TRUE(Full.umax(Empty).isEmptySet());
EXPECT_TRUE(Full.umax(Some).isFullSet());
EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
EXPECT_TRUE(Full.umax(Wrap).isFullSet());
EXPECT_TRUE(Full.umax(One).isFullSet());
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);
@ -304,19 +303,21 @@ TEST_F(ConstantRangeTest, UMax) {
TEST_F(ConstantRangeTest, SMax) {
EXPECT_TRUE(Full.smax(Full).isFullSet());
EXPECT_TRUE(Full.smax(Empty).isEmptySet());
EXPECT_TRUE(Full.smax(Some).isFullSet());
EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
APInt::getSignedMinValue(16)));
EXPECT_TRUE(Full.smax(Wrap).isFullSet());
EXPECT_TRUE(Full.smax(One).isFullSet());
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, INT16_MIN)));
APInt(16, INT16_MIN)));
EXPECT_EQ(Some.smax(One), Some);
EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
APInt(16, INT16_MIN)));
APInt(16, INT16_MIN)));
EXPECT_EQ(One.smax(One), One);
}