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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 | 464a4f349c95a25d06d709e79d7df21fbbb155e2 (patch) | |
| tree | 64138b42f42f19719c229bd1237a006084fbfe6e /lib/Analysis/ValueTracking.cpp | |
| parent | e19b7b80bd1bf48f9a6f036cf1cbc5f65445090a (diff) | |
| download | external_llvm-464a4f349c95a25d06d709e79d7df21fbbb155e2.zip external_llvm-464a4f349c95a25d06d709e79d7df21fbbb155e2.tar.gz external_llvm-464a4f349c95a25d06d709e79d7df21fbbb155e2.tar.bz2 | |
APInt has a method for determining whether a number is a power of 2
which is more efficient than countPopulation - use it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124283 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | lib/Analysis/ValueTracking.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index 5320fa0..aa7769e 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/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 |