From 35b1423ee67a6ec7052016dda486e6ee4a118db4 Mon Sep 17 00:00:00 2001 From: Meador Inge Date: Thu, 7 Feb 2013 18:36:50 +0000 Subject: 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 --- unittests/ADT/APIntTest.cpp | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'unittests') 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()); -- cgit v1.2.3