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[ConstantRange] Add test case showing a case where we pick too large of a range for multiply after r271020.

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llvm-svn: 302700
This commit is contained in:
Craig Topper 2017-05-10 18:15:06 +00:00
parent ecf5118408
commit 8ecd061605
1 changed files with 5 additions and 0 deletions
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5
unittests/IR/ConstantRangeTest.cpp
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@ -443,6 +443,11 @@ TEST_F(ConstantRangeTest, Multiply) {
EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 255)).multiply( EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 255)).multiply(
ConstantRange(APInt(8, 2), APInt(8, 4))), ConstantRange(APInt(8, 2), APInt(8, 4))),
ConstantRange(APInt(8, 250), APInt(8, 253))); ConstantRange(APInt(8, 250), APInt(8, 253)));
// TODO: This should be return [-2, 0]
EXPECT_EQ(ConstantRange(APInt(8, -2)).multiply(
ConstantRange(APInt(8, 0), APInt(8, 2))),
ConstantRange(APInt(8, 0), APInt(8, 255)));
} }
TEST_F(ConstantRangeTest, UMax) { TEST_F(ConstantRangeTest, UMax) {