Bug fix in BumpPtrAllocator: don't assume that all objects have the same alignment.  "Bump" of the pointer for the next allocated object to be of the specified alignment.

llvm-svn: 50362

llvm-svn: 45418

first region, just deallocate all but the last region in the list.

llvm-svn: 41782

Added Reset() to free all allocated memory regions and reset state to be the same as right after ctor.

llvm-svn: 41728

llvm-svn: 34539

llvm-svn: 32340

now cerr, cout, and NullStream resp.

llvm-svn: 32298

llvm-svn: 31927

This fixes the build on OpenBSD and potentially other systems.

llvm-svn: 31550

I'm about to add.  This is similar to, but necessarily different than, the
STL allocator class.

llvm-svn: 31285