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Add a unittest for rotating a really big APInt.

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Clang miscompiles it under certain circumstances, and it's a good exercise for APInt.

llvm-svn: 149986
This commit is contained in:
Benjamin Kramer 2012-02-07 16:27:39 +00:00
parent dde136cf30
commit 6d9863be3a
1 changed files with 4 additions and 0 deletions
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4
unittests/ADT/APIntTest.cpp
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@ -480,6 +480,10 @@ TEST(APIntTest, Rotate) {
EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2)); EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2));
EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4)); EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4));
EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8)); EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8));
APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16);
APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16);
EXPECT_EQ(Rot, Big.rotr(144));
} }
} }