diff options
| -rw-r--r-- | include/llvm/ADT/APInt.h | 2 | ||||
| -rw-r--r-- | unittests/ADT/APIntTest.cpp | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index 8bfdcbfa36..8f5c72d8a2 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -1265,7 +1265,7 @@ public: /// \returns the number of words to hold the integer value with a given bit /// width. static unsigned getNumWords(unsigned BitWidth) { - return (BitWidth + APINT_BITS_PER_WORD - 1) / APINT_BITS_PER_WORD; + return ((uint64_t)BitWidth + APINT_BITS_PER_WORD - 1) / APINT_BITS_PER_WORD; } /// \brief Compute the number of active bits in the value diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp index 5043aa0eec..01a30dfd20 100644 --- a/unittests/ADT/APIntTest.cpp +++ b/unittests/ADT/APIntTest.cpp @@ -623,6 +623,14 @@ TEST(APIntTest, arrayAccess) { } } +TEST(APIntTest, LargeAPIntConstruction) { + // Check that we can properly construct very large APInt. It is very + // unlikely that people will ever do this, but it is a legal input, + // so we should not crash on it. + APInt A9(UINT32_MAX, 0); + EXPECT_FALSE(A9.getBoolValue()); +} + TEST(APIntTest, nearestLogBase2) { // Single word check. |