[llvm-dev] RFC: Introduce DW_OP_LLVM_memory to describe variables in memory with dbg.value

[Reid Kleckner via llvm-dev]

On Thu, Sep 7, 2017 at 10:32 AM, David Blaikie <dblaikie at gmail.com> wrote:

>
>>> Sure - this goes back to my adding the "indirect" flag to support C++
>>> non-trivial pass by value in C++, before we had all the more general
>>> expression support, etc. (hilariously, what was there before was even more
>>> awesome: we encoded the type of the parameter in the DWARF as T& instead of
>>> T... literally changing the signature of the function... )
>>>
>>
>> Awesome, Bob just did the same thing for CodeView for NRVO in r312034,
>> because we don't have DW_OP_deref.
>>
>
> Oh, hey, right...
>
> Is this what MSVC does? That does seem unfortunate.
>
>>
They don't do NRVO in -O0 builds.
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