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After some discussion with djg, teach SmallVector to grow from a zero

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capacity and remove the workaround in SmallVector<T,0>.  There are some
theoretical benefits to a N->2N+1 growth policy anyway.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112870 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
John McCall
2010-09-02 21:55:03 +00:00
parent 5594560766
commit 2a9a2dba4c
2 changed files with 7 additions and 18 deletions
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2
lib/Support/SmallVector.cpp
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@ -18,7 +18,7 @@ using namespace llvm;
/// on POD-like datatypes and is out of line to reduce code duplication.
void SmallVectorBase::grow_pod(size_t MinSizeInBytes, size_t TSize) {
size_t CurSizeBytes = size_in_bytes();
size_t NewCapacityInBytes = 2 * capacity_in_bytes();
size_t NewCapacityInBytes = 2 * capacity_in_bytes() + TSize; // Always grow.
if (NewCapacityInBytes < MinSizeInBytes)
NewCapacityInBytes = MinSizeInBytes;