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make ConstantRange::signExtend() optimal

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the case [x, INT_MIN) was not handled optimally

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193694 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nuno Lopes
2013-10-30 15:36:50 +00:00
parent c385709d83
commit d3b64efcb3
2 changed files with 8 additions and 0 deletions
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3
unittests/Support/ConstantRangeTest.cpp
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@ -216,6 +216,9 @@ TEST_F(ConstantRangeTest, SExt) {
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) {