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| author | Meador Inge <meadori@codesourcery.com> | 2013-02-07 18:36:50 +0000 |
|---|---|---|
| committer | Meador Inge <meadori@codesourcery.com> | 2013-02-07 18:36:50 +0000 |
| commit | 35b1423ee67a6ec7052016dda486e6ee4a118db4 (patch) | |
| tree | de4008f97ca37a551caff7463b7fb6c9ad87121a /unittests | |
| parent | def0c1f756562601829364e3fca4bd1f0407316e (diff) | |
| download | llvm-35b1423ee67a6ec7052016dda486e6ee4a118db4.tar.gz llvm-35b1423ee67a6ec7052016dda486e6ee4a118db4.tar.bz2 llvm-35b1423ee67a6ec7052016dda486e6ee4a118db4.tar.xz | |
ADT: Correct APInt::getActiveWords for zero values
PR15138 was opened because of a segfault in the Bitcode writer.
The actual issue ended up being a bug in APInt where calls to
APInt::getActiveWords returns a bogus value when the APInt value
is 0. This patch fixes the problem by ensuring that getActiveWords
returns 1 for 0 valued APInts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174641 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests')
| -rw-r--r-- | unittests/ADT/APIntTest.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp index 2a4c5b4c49..2510bc738d 100644 --- a/unittests/ADT/APIntTest.cpp +++ b/unittests/ADT/APIntTest.cpp @@ -56,6 +56,14 @@ TEST(APIntTest, i33_Count) { #endif TEST(APIntTest, i65_Count) { + APInt i65(65, 0, true); + EXPECT_EQ(65u, i65.countLeadingZeros()); + EXPECT_EQ(0u, i65.countLeadingOnes()); + EXPECT_EQ(0u, i65.getActiveBits()); + EXPECT_EQ(1u, i65.getActiveWords()); + EXPECT_EQ(65u, i65.countTrailingZeros()); + EXPECT_EQ(0u, i65.countPopulation()); + APInt i65minus(65, 0, true); i65minus.setBit(64); EXPECT_EQ(0u, i65minus.countLeadingZeros()); |