> On Jul 31, 2016, at 1:46 AM, Amjad Aboud <amjad.ab...@intel.com> wrote:
> 
> aaboud added a comment.
> 
>> ISTM that the DWARF spec intended such thunks to be encoded as 
>> `DW_AT_trampoline`.  That seems more appropriate than relying on codegen 
>> emitting a tailcall.  This way the debugger can make the policy decision of 
>> whether or not thunks should show up in the backtrace.
> 
>> 
> 
>> In any case, correctness must always trump all else.  Reverting to green 
>> should take precedence over a QoI bug like PR24235.
> 
> 
> I agree to the revert, though I am not sure about the new test, it looks too 
> complected, especially the command line.

An app crashed somewhere because it loaded a garbage value from the stack. To 
show that problem the test is.a little longer than it would be if we only 
wanted to check " no tail + byval “. 
> I will let David decide on accepting that test or ask for improvement.
> 
> Regards,
> Amjad
> 
> 
> https://reviews.llvm.org/D22900
> 
> 
> 

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