diff options
| -rw-r--r-- | include/llvm/ADT/APInt.h | 3 | ||||
| -rw-r--r-- | unittests/ADT/APIntTest.cpp | 8 |
2 files changed, 10 insertions, 1 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index e67e032ace..2e623a1e0d 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -1191,7 +1191,8 @@ public: /// APInt. This is used in conjunction with getActiveData to extract the raw /// value of the APInt. unsigned getActiveWords() const { - return whichWord(getActiveBits()-1) + 1; + unsigned numActiveBits = getActiveBits(); + return numActiveBits ? whichWord(numActiveBits - 1) + 1 : 1; } /// Computes the minimum bit width for this APInt while considering it to be 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()); |