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

[Andrew Trick]

On May 25, 2013, at 10:48 PM, Andrew Trick <atrick at apple.com> wrote:

> 
> On May 25, 2013, at 2:39 PM, Jakob Stoklund Olesen <stoklund at 2pi.dk> wrote:
> 
>> 
>> 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.

r182717 should clear up Cameron's issue, PR16143, and dragonegg buildbot. DEBUG_VALUE test cases are painful.

-Andy