Reduce alignment of SmallVector<T> to the required amount, rather than forcing 16-byte alignment. This fixes misaligned SmallVector accesses via ExtractValueInst's SmallVector data member.

llvm-svn: 162331

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

llvm-svn: 112870

realloc implementation can try to expand the allocated memory block in-place,
avoiding the copy.

llvm-svn: 105605

SmallVectorBase::grow_pod out of line, finally satisfying PR3758.

llvm-svn: 91529