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author | Dan Gohman <gohman@apple.com> | 2010-11-03 00:38:40 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2010-11-03 00:38:40 +0000 |
commit | 5005e27f9714f0eaa5b8b7a5a1f6751afa163f07 (patch) | |
tree | 6276391e2456e32c527f50d8d98b7c611d52c859 /include | |
parent | 9372fd3c92777a137f0a1a34375c1863afe64c9c (diff) | |
download | llvm-5005e27f9714f0eaa5b8b7a5a1f6751afa163f07.tar.gz llvm-5005e27f9714f0eaa5b8b7a5a1f6751afa163f07.tar.bz2 llvm-5005e27f9714f0eaa5b8b7a5a1f6751afa163f07.tar.xz |
Factor code out of APInt to form a isUIntN helper function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118133 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/ADT/APInt.h | 2 | ||||
-rw-r--r-- | include/llvm/Support/MathExtras.h | 6 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index e03f63bebf..d398f8e3f6 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -348,7 +348,7 @@ public: return true; if (isSingleWord()) - return VAL == (VAL & (~0ULL >> (64 - N))); + return isUIntN(N, VAL); APInt Tmp(N, getNumWords(), pVal); Tmp.zext(getBitWidth()); return Tmp == (*this); diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index 3b907808dd..dafb479a99 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -71,6 +71,12 @@ inline bool isUInt<32>(uint64_t x) { return static_cast<uint32_t>(x) == x; } +/// isUIntN - Checks if an unsigned integer fits into the given (dynamic) +/// bit width. +inline bool isUIntN(unsigned N, uint64_t x) { + return x == (x & (~0ULL >> (64 - N))); +} + /// isMask_32 - This function returns true if the argument is a sequence of ones /// starting at the least significant bit with the remainder zero (32 bit /// version). Ex. isMask_32(0x0000FFFFU) == true. |