[llvm] r214761 - Reapply "DebugInfo: Ensure that all debug location scope chains from instructions within a function, lead to the function itself."

[Reid Kleckner]

Hey, I've got one (unreduced).

On Mon, Oct 6, 2014 at 9:54 AM, Reid Kleckner <rnk at google.com> wrote:

> Yeah, let me try a self-host with that patch, assuming it reverts cleanly
> at TOT.
>
> On Sun, Oct 5, 2014 at 9:09 AM, David Blaikie <dblaikie at gmail.com> wrote:
>
>> Hey Reid - I seem to recall last time we spoke it turned out you'd sent
>> the wrong .cpp file and now only had the IR for the reproduction?
>>
>> Any way we could get the original source reproduction for this (reducing
>> debug test cases in IR is difficult)? I'd really like to move forward with
>> this change as it introduces some useful invariants (and violations of
>> those invariants most likely represent pretty clear bugs in LLVM's debug
>> info for inlined functions).
>>
>> On Sat, Aug 9, 2014 at 8:59 AM, Reid Kleckner <rnk at google.com> wrote:
>>
>>> On Fri, Aug 8, 2014 at 2:40 PM, David Blaikie <dblaikie at gmail.com>
>>> wrote:
>>>
>>>> On Wed, Aug 6, 2014 at 3:54 PM, Reid Kleckner <rnk at google.com> wrote:
>>>> > Here's an O0 .ll file that breaks llc if you run opt -O2 on it, but
>>>> passes
>>>> > if you run llc:
>>>> > $ llc t.ll  # succeeds
>>>> > $ opt -O2 t.ll -o - | llc -o t.s
>>>> > Assertion failed: DISubprogram(Scope).describes(MF->getFunction()),
>>>> file
>>>> > ..\lib\CodeGen\LexicalScopes.cpp, line 179
>>>>
>>>> Haven't had any luck getting this to fail... any ideas? I can
>>>> side-by-side debug it with you next week, if it comes to that...
>>>
>>>
>>> Hm, try llc -mtriple=i686-windows-msvc?
>>>
>>
>>
>
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