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| author | Duncan Sands <baldrick@free.fr> | 2011-01-26 08:44:16 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2011-01-26 08:44:16 +0000 |
| commit | 8a33733228db5a21b16e0532d5b2e0bae011a33a (patch) | |
| tree | 0d5a200cc0f108a2c7b08d940e1855f7b9b9dd58 /llvm/lib/Analysis/ValueTracking.cpp | |
| parent | d9e6b4a8ff25a2756c438edbec2114797fc280f3 (diff) | |
| download | llvm-8a33733228db5a21b16e0532d5b2e0bae011a33a.zip llvm-8a33733228db5a21b16e0532d5b2e0bae011a33a.tar.gz llvm-8a33733228db5a21b16e0532d5b2e0bae011a33a.tar.bz2 | |
APInt has a method for determining whether a number is a power of 2
which is more efficient than countPopulation - use it.
llvm-svn: 124283
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 5320fa0..aa7769e 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -656,7 +656,7 @@ void llvm::ComputeSignBit(Value *V, bool &KnownZero, bool &KnownOne, /// types and vectors of integers. bool llvm::isPowerOfTwo(Value *V, const TargetData *TD, unsigned Depth) { if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) - return CI->getValue().countPopulation() == 1; + return CI->getValue().isPowerOf2(); // TODO: Handle vector constants. // 1 << X is clearly a power of two if the one is not shifted off the end. If |