[llvm] r182704 - Track IR ordering of SelectionDAG nodes 3/4.

[Jakob Stoklund Olesen]

On May 25, 2013, at 2:30 PM, Cameron Zwarich <zwarich at apple.com> wrote:

> I am seeing some issues introduced by this patch (or the next patch, I had to revert them together). I now see DBG_VALUE instructions inserted between two terminators of an MBB, which the verifier complains about. Some pass (I didn't track down which) is confused by this and drops CFG edges between basic blocks, leading to a jump with a target of BB#-1 when a block is removed for having no predecessors.

I think this caused PR16143 as well.

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