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Rename NextPowerOfTwo to RoundUpToPowerOfTwo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107297 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -199,29 +199,29 @@ public:
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}
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};
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/// NextPowerOfTwo - This is a helper template that rounds N up to the next
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/// RoundUpToPowerOfTwo - This is a helper template that rounds N up to the next
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/// power of two (which means N itself if N is already a power of two).
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template<unsigned N>
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struct NextPowerOfTwo;
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struct RoundUpToPowerOfTwo;
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/// NextPowerOfTwoH - If N is not a power of two, increase it. This is a helper
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/// template used to implement NextPowerOfTwo.
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/// RoundUpToPowerOfTwoH - If N is not a power of two, increase it. This is a
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/// helper template used to implement RoundUpToPowerOfTwo.
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template<unsigned N, bool isPowerTwo>
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struct NextPowerOfTwoH {
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struct RoundUpToPowerOfTwoH {
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enum { Val = N };
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};
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template<unsigned N>
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struct NextPowerOfTwoH<N, false> {
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struct RoundUpToPowerOfTwoH<N, false> {
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enum {
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// We could just use NextVal = N+1, but this converges faster. N|(N-1) sets
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// the right-most zero bits to one all at once, e.g. 0b0011000 -> 0b0011111.
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Val = NextPowerOfTwo<(N|(N-1)) + 1>::Val
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Val = RoundUpToPowerOfTwo<(N|(N-1)) + 1>::Val
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};
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};
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template<unsigned N>
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struct NextPowerOfTwo {
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enum { Val = NextPowerOfTwoH<N, (N&(N-1)) == 0>::Val };
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struct RoundUpToPowerOfTwo {
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enum { Val = RoundUpToPowerOfTwoH<N, (N&(N-1)) == 0>::Val };
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};
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@ -232,7 +232,7 @@ struct NextPowerOfTwo {
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template<class PtrType, unsigned SmallSize>
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class SmallPtrSet : public SmallPtrSetImpl {
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// Make sure that SmallSize is a power of two, round up if not.
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enum { SmallSizePowTwo = NextPowerOfTwo<SmallSize>::Val };
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enum { SmallSizePowTwo = RoundUpToPowerOfTwo<SmallSize>::Val };
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/// SmallStorage - Fixed size storage used in 'small mode'. The extra element
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/// ensures that the end iterator actually points to valid memory.
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const void *SmallStorage[SmallSizePowTwo+1];
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