<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 9, 2016 at 11:26 AM, Xinliang David Li <span dir="ltr"><<a href="mailto:davidxl@google.com" target="_blank">davidxl@google.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Tue, Feb 9, 2016 at 11:14 AM, David Blaikie <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>> wrote:<br>
><br>
><br>
> On Mon, Feb 8, 2016 at 9:23 PM, Xinliang David Li <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
> wrote:<br>
>><br>
>> Wrong in the sense the the coverage result for the default operators<br>
>> (the line where they are declared) is marked as if they are not called<br>
>> which can be confusing to the user.<br>
><br>
><br>
> Presumably a user would have the same problem with implicit ops - the class<br>
> header/name would be marked as if there was code that was not called there?<br>
<br>
</span>that would be confusing though -- as data of many implicitly declared<br>
functions will be lumped together and user won't know what that is .<br></blockquote><div><br></div><div>Presumably it's still going to be confusing, though - the line table will record that line and the counter won't be there, so the header of the type will be marked in red & a user worried about coverage may go through some contortions to try to discover and cover that code, no? (even though it may already be covered & is just being reported incorrectly due to their being no counters)<br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<span class="HOEnZb"><font color="#888888"><br>
David<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
><br>
> - David<br>
><br>
>><br>
>><br>
>> David<br>
>><br>
>> On Mon, Feb 8, 2016 at 9:09 PM, David Blaikie <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>> wrote:<br>
>> ><br>
>> ><br>
>> > On Mon, Feb 8, 2016 at 9:00 PM, Xinliang David Li <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> > wrote:<br>
>> >><br>
>> >> On Mon, Feb 8, 2016 at 8:46 PM, David Blaikie <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> wrote:<br>
>> >> ><br>
>> >> > On Mon, Feb 8, 2016 at 7:39 PM, Xinliang David Li<br>
>> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> > wrote:<br>
>> >> >><br>
>> >> >> I took a look at the problem. The implicitly defaulted operators<br>
>> >> >> should not be instrumented as specified -- I actually I just added<br>
>> >> >> the<br>
>> >> >> new test case for that (checking profile counter not generated)<br>
>> >> >> right<br>
>> >> >> after my previous reply and it still passes with this patch. The<br>
>> >> >> reason is that those operators have 'implicit' bit set, and profile<br>
>> >> >> instrumentation in FE is implemented in two stages: 1) counter<br>
>> >> >> assignment; 2) actual transformation. For methods with implicit bit<br>
>> >> >> set, step 1) is skipped as designed, so step 2) simply becomes a<br>
>> >> >> no-op.<br>
>> >> >><br>
>> >> >> In short, the test case still needs explicit '=default', and the<br>
>> >> >> implicit case is covered elsewhere.<br>
>> >> ><br>
>> >> ><br>
>> >> > OK, thanks for the explanation!<br>
>> >> ><br>
>> >> > Why is that the case, though - why would an implicitly default<br>
>> >> > function<br>
>> >> > be<br>
>> >> > any different from a profile (& profile-guided-optimization)<br>
>> >> > perspective<br>
>> >> > from an explicitly defaulted one?<br>
>> >><br>
>> >> There are two factors to consider -- PGO and coverage testing.<br>
>> >> Implicitly declared functions are usually small/single BB so<br>
>> >> instrumenting them does not bring too much benefit (they will be<br>
>> >> inlined most of the cases any way) while increasing instrumentation<br>
>> >> overhead. They are not needed for coveraging test either (as there are<br>
>> >> no source lines to cover). This is a good tuning heuristic in most<br>
>> >> cases, but can get wrong sometimes (IR based late instrumentation is<br>
>> >> more focused on performance thus not depending on this tuning).<br>
>> >><br>
>> >> Explicitly defaulted ones are different in the sense that if they are<br>
>> >> not instrumented, the coverage result will be wrong.<br>
>> ><br>
>> ><br>
>> > wrong in what way? Both functions (explicitly or implicitly defaulted)<br>
>> > will<br>
>> > be emitted, with line tables (looks like the = defaulted one is<br>
>> > attributed<br>
>> > to the line where the = default was written, and the implicitly<br>
>> > defaulted<br>
>> > one is attributed to wherever the class name is written)<br>
>> ><br>
>> > - David<br>
>> ><br>
>> >><br>
>> >><br>
>> >> thanks,<br>
>> >><br>
>> >> David<br>
>> >><br>
>> >> ><br>
>> >> >><br>
>> >> >><br>
>> >> >> thanks,<br>
>> >> >><br>
>> >> >> David<br>
>> >> >><br>
>> >> >> On Mon, Feb 8, 2016 at 5:23 PM, David Blaikie <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> wrote:<br>
>> >> >> ><br>
>> >> >> ><br>
>> >> >> > On Mon, Feb 8, 2016 at 5:05 PM, Xinliang David Li<br>
>> >> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> >> > wrote:<br>
>> >> >> >><br>
>> >> >> >> ha! somehow I kept thinking you are referring to implicit<br>
>> >> >> >> declared<br>
>> >> >> >> ctors.<br>
>> >> >> ><br>
>> >> >> ><br>
>> >> >> > Ah, glad we figured out the disconnect - thanks for bearing with<br>
>> >> >> > me!<br>
>> >> >> ><br>
>> >> >> >><br>
>> >> >> >><br>
>> >> >> >> From your test case, it is seems that the implicit copy/move op<br>
>> >> >> >> is<br>
>> >> >> >> also broken and is fixed by this patch too. That means a missing<br>
>> >> >> >> test<br>
>> >> >> >> case to me. Will update the case when verified.<br>
>> >> >> ><br>
>> >> >> ><br>
>> >> >> > Again, this is a case where I'd probably just simplify the test,<br>
>> >> >> > as I<br>
>> >> >> > asked<br>
>> >> >> > earlier in the thread (I asked if it mattered if the op was<br>
>> >> >> > explicitly<br>
>> >> >> > or<br>
>> >> >> > implicitly defaulted (& your response: "> Is the fix/codepath<br>
>> >> >> > specifically<br>
>> >> >> > about explicitly defaulted ops?<br>
>> >> >> ><br>
>> >> >> > yes -- explicitly defaulted. There are some test coverage already<br>
>> >> >> > for<br>
>> >> >> > implicitly declared ctors (but not assignment op -- probably worth<br>
>> >> >> > adding some testing too).")<br>
>> >> >> ><br>
>> >> >> > So I'd just simplify the test by removing the "= default" - I<br>
>> >> >> > don't<br>
>> >> >> > think<br>
>> >> >> > there's value in testing both the explicit default and implicit<br>
>> >> >> > default<br>
>> >> >> > if<br>
>> >> >> > it's just the default-y-ness that's relevant here. Otherwise we<br>
>> >> >> > could<br>
>> >> >> > end up<br>
>> >> >> > testing all sorts of ways of writing/interacting with dtors which<br>
>> >> >> > wouldn't<br>
>> >> >> > be relevant to the code/fix/etc.<br>
>> >> >> ><br>
>> >> >> > This seems like the obvious test for the behavior:<br>
>> >> >> ><br>
>> >> >> > struct foo {<br>
>> >> >> > // non-trivial ops<br>
>> >> >> > foo &operator=(const foo&);<br>
>> >> >> > foo &operator=(foo&&);<br>
>> >> >> > };<br>
>> >> >> ><br>
>> >> >> > struct bar {<br>
>> >> >> > foo f; // or derive bar from foo, but I think the member version<br>
>> >> >> > is<br>
>> >> >> > simpler<br>
>> >> >> > };<br>
>> >> >> ><br>
>> >> >> > // force emission of bar's implicit special members, one way or<br>
>> >> >> > another:<br>
>> >> >> > bar &(bar::*x)(const bar&) = &bar::operator=;<br>
>> >> >> > bar &(bar::*x)(bar&&) = &bar::operator=;<br>
>> >> >> ><br>
>> >> >> > (or just call them as you had in your test case - but that<br>
>> >> >> > produces<br>
>> >> >> > more<br>
>> >> >> > code, etc in the module, extra functions/profile counters/etc)<br>
>> >> >> ><br>
>> >> >> > - Dave<br>
>> >> >> ><br>
>> >> >> >><br>
>> >> >> >><br>
>> >> >> >> thanks,<br>
>> >> >> >><br>
>> >> >> >> David<br>
>> >> >> >><br>
>> >> >> >><br>
>> >> >> >> On Mon, Feb 8, 2016 at 4:58 PM, David Blaikie<br>
>> >> >> >> <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> >> wrote:<br>
>> >> >> >> ><br>
>> >> >> >> ><br>
>> >> >> >> > On Mon, Feb 8, 2016 at 4:31 PM, Xinliang David Li<br>
>> >> >> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> >> >> > wrote:<br>
>> >> >> >> >><br>
>> >> >> >> >> On Mon, Feb 8, 2016 at 4:05 PM, David Blaikie<br>
>> >> >> >> >> <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> >> >> wrote:<br>
>> >> >> >> >> ><br>
>> >> >> >> >> ><br>
>> >> >> >> >> > On Mon, Feb 8, 2016 at 3:58 PM, Xinliang David Li<br>
>> >> >> >> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> >> >> >> > wrote:<br>
>> >> >> >> >> >><br>
>> >> >> >> >> >> To be clear, you are suggesting breaking the test into two<br>
>> >> >> >> >> >> (one<br>
>> >> >> >> >> >> for<br>
>> >> >> >> >> >> copy, and one for move) ? I am totally fine with that.<br>
>> >> >> >> >> ><br>
>> >> >> >> >> ><br>
>> >> >> >> >> > Nah, no need to split the test case - we try to keep the<br>
>> >> >> >> >> > number<br>
>> >> >> >> >> > of<br>
>> >> >> >> >> > test<br>
>> >> >> >> >> > files down (& group related tests into a single file) to<br>
>> >> >> >> >> > reduce<br>
>> >> >> >> >> > test<br>
>> >> >> >> >> > execution time (a non-trivial about of check time is spent<br>
>> >> >> >> >> > in<br>
>> >> >> >> >> > process<br>
>> >> >> >> >> > overhead).<br>
>> >> >> >> >> ><br>
>> >> >> >> >> >><br>
>> >> >> >> >> >> I thought you<br>
>> >> >> >> >> >> suggested removing the testing of move/op case because they<br>
>> >> >> >> >> >> might<br>
>> >> >> >> >> >> share the same code path (clang's implementation) as the<br>
>> >> >> >> >> >> copy/op.<br>
>> >> >> >> >> ><br>
>> >> >> >> >> ><br>
>> >> >> >> >> > I was suggesting that two cases is no big deal whether you<br>
>> >> >> >> >> > test<br>
>> >> >> >> >> > both<br>
>> >> >> >> >> > or<br>
>> >> >> >> >> > test<br>
>> >> >> >> >> > one if they're the same codepath - if there were 5/many more<br>
>> >> >> >> >> > things<br>
>> >> >> >> >> > that<br>
>> >> >> >> >> > shared the same codepath, I'd generally suggest testing a<br>
>> >> >> >> >> > representative<br>
>> >> >> >> >> > sample (possibly just a single one) rather than testing<br>
>> >> >> >> >> > every<br>
>> >> >> >> >> > client<br>
>> >> >> >> >> > of<br>
>> >> >> >> >> > the<br>
>> >> >> >> >> > same code.<br>
>> >> >> >> >> ><br>
>> >> >> >> >> > Feel free to leave the two here as-is. (though if we're<br>
>> >> >> >> >> > talking<br>
>> >> >> >> >> > about<br>
>> >> >> >> >> > test<br>
>> >> >> >> >> > granularity, it's probably worth just putting these cases in<br>
>> >> >> >> >> > the<br>
>> >> >> >> >> > same<br>
>> >> >> >> >> > file/type/etc as the ctor cases you mentioned were already<br>
>> >> >> >> >> > covered)<br>
>> >> >> >> >><br>
>> >> >> >> >> There is a balance somewhere:<br>
>> >> >> >> >> 1) for small test cases like this, the overhead mainly comes<br>
>> >> >> >> >> from<br>
>> >> >> >> >> test<br>
>> >> >> >> >> set up cost -- adding additional incremental test in the same<br>
>> >> >> >> >> file<br>
>> >> >> >> >> probably almost comes for free (in terms of cost). However<br>
>> >> >> >> >> 2) having too many cases grouped together also reduces the<br>
>> >> >> >> >> debuggability when some test fails.<br>
>> >> >> >> ><br>
>> >> >> >> ><br>
>> >> >> >> > Yep, for sure. In this case, testing the ctors and assignment<br>
>> >> >> >> > ops<br>
>> >> >> >> > in<br>
>> >> >> >> > one<br>
>> >> >> >> > file's probably not a bad tradeoff (you can see how Clang<br>
>> >> >> >> > groups<br>
>> >> >> >> > its<br>
>> >> >> >> > tests -<br>
>> >> >> >> > a file per language feature in many cases, exploring the myriad<br>
>> >> >> >> > ways<br>
>> >> >> >> > the<br>
>> >> >> >> > feature can be used - this doesn't always work spectacularly<br>
>> >> >> >> > (when<br>
>> >> >> >> > you<br>
>> >> >> >> > can't<br>
>> >> >> >> > order the IR emission to happen mostly in the order that the<br>
>> >> >> >> > source<br>
>> >> >> >> > is<br>
>> >> >> >> > written (rather being interleaved))<br>
>> >> >> >> ><br>
>> >> >> >> > Anyway, up to you - that part isn't something I'm terribly<br>
>> >> >> >> > worried<br>
>> >> >> >> > about<br>
>> >> >> >> > either way.<br>
>> >> >> >> ><br>
>> >> >> >> >><br>
>> >> >> >> >><br>
>> >> >> >> >> ><br>
>> >> >> >> >> > & I'm still curious/wondering if there's a common codepath<br>
>> >> >> >> >> > that<br>
>> >> >> >> >> > would<br>
>> >> >> >> >> > provide a simpler fix/code that solved both implicit and<br>
>> >> >> >> >> > explicitly<br>
>> >> >> >> >> > defaulted ops.<br>
>> >> >> >> >><br>
>> >> >> >> >> I may take a look at that when I find time -- but there is no<br>
>> >> >> >> >> guarantee<br>
>> >> >> >> >> :)<br>
>> >> >> >> ><br>
>> >> >> >> ><br>
>> >> >> >> > A quick test of putting "assert(false)" in<br>
>> >> >> >> > emitImplicitAssignmentOperatorBody and running Clang over this<br>
>> >> >> >> > code:<br>
>> >> >> >> ><br>
>> >> >> >> > struct foo {<br>
>> >> >> >> > foo &operator=(const foo &);<br>
>> >> >> >> > };<br>
>> >> >> >> ><br>
>> >> >> >> > struct bar {<br>
>> >> >> >> > foo f;<br>
>> >> >> >> > };<br>
>> >> >> >> ><br>
>> >> >> >> > auto (bar::*x)(const bar&) = &bar::operator=;<br>
>> >> >> >> ><br>
>> >> >> >> > Fires the assertion - this seems to me to indicate that the<br>
>> >> >> >> > codepath<br>
>> >> >> >> > you<br>
>> >> >> >> > changed is used for both the explicitly (based on the change<br>
>> >> >> >> > fixing<br>
>> >> >> >> > your<br>
>> >> >> >> > test case) and implicitly defaulted (based on my test case)<br>
>> >> >> >> > cases.<br>
>> >> >> >> ><br>
>> >> >> >> > Is it possible that you end up with duplicate counters by<br>
>> >> >> >> > accident<br>
>> >> >> >> > in<br>
>> >> >> >> > this<br>
>> >> >> >> > path, then? Or at least that whatever codepath was handling the<br>
>> >> >> >> > implicitly<br>
>> >> >> >> > defaulted ones is now redundant with this one?<br>
>> >> >> >> ><br>
>> >> >> >> > Actually, so far as I can tell this doesn't work for implicitly<br>
>> >> >> >> > defaulted<br>
>> >> >> >> > move ops (the above test case doesn't have an add pgocount in<br>
>> >> >> >> > it)<br>
>> >> >> >> > -<br>
>> >> >> >> > perhaps<br>
>> >> >> >> > I'm missing something/doing it wrong? or was just not<br>
>> >> >> >> > communicating<br>
>> >> >> >> > clearly<br>
>> >> >> >> > regarding explicit versus implicitly defaulted special members.<br>
>> >> >> >> ><br>
>> >> >> >> > - Dave<br>
>> >> >> >> ><br>
>> >> >> >> >><br>
>> >> >> >> >><br>
>> >> >> >> >> thanks,<br>
>> >> >> >> >><br>
>> >> >> >> >> David<br>
>> >> >> >> >><br>
>> >> >> >> >><br>
>> >> >> >> >><br>
>> >> >> >> >> ><br>
>> >> >> >> >> > - Dave<br>
>> >> >> >> >> ><br>
>> >> >> >> >> >><br>
>> >> >> >> >> >><br>
>> >> >> >> >> >> thanks,<br>
>> >> >> >> >> >><br>
>> >> >> >> >> >> David<br>
>> >> >> >> >> >><br>
>> >> >> >> >> >> On Mon, Feb 8, 2016 at 3:52 PM, David Blaikie<br>
>> >> >> >> >> >> <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> >> >> >> wrote:<br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> > On Mon, Feb 8, 2016 at 3:46 PM, Xinliang David Li<br>
>> >> >> >> >> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> >> >> >> >> > wrote:<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> On Mon, Feb 8, 2016 at 3:35 PM, David Blaikie<br>
>> >> >> >> >> >> >> <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> >> >> >> >> wrote:<br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> > On Mon, Feb 8, 2016 at 3:21 PM, Xinliang David Li<br>
>> >> >> >> >> >> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> >> >> >> >> >> > wrote:<br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> On Mon, Feb 8, 2016 at 3:17 PM, David Blaikie<br>
>> >> >> >> >> >> >> >> <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> >> >> >> >> >> wrote:<br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> > On Mon, Feb 8, 2016 at 12:07 PM, Xinliang David Li<br>
>> >> >> >> >> >> >> >> > <<a href="mailto:davidxl@google.com">davidxl@google.com</a>><br>
>> >> >> >> >> >> >> >> > wrote:<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> On Mon, Feb 8, 2016 at 11:39 AM, David Blaikie<br>
>> >> >> >> >> >> >> >> >> <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
>> >> >> >> >> >> >> >> >> wrote:<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > On Mon, Feb 8, 2016 at 9:25 AM, David Li via<br>
>> >> >> >> >> >> >> >> >> > llvm-commits<br>
>> >> >> >> >> >> >> >> >> > <<a href="mailto:llvm-commits@lists.llvm.org">llvm-commits@lists.llvm.org</a>> wrote:<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> davidxl updated this revision to Diff 47217.<br>
>> >> >> >> >> >> >> >> >> >> davidxl added a comment.<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> Simplified test case suggested by Vedant.<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> <a href="http://reviews.llvm.org/D16947" rel="noreferrer" target="_blank">http://reviews.llvm.org/D16947</a><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> Files:<br>
>> >> >> >> >> >> >> >> >> >> lib/CodeGen/CGClass.cpp<br>
>> >> >> >> >> >> >> >> >> >> test/Profile/def-assignop.cpp<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> Index: test/Profile/def-assignop.cpp<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> ===================================================================<br>
>> >> >> >> >> >> >> >> >> >> --- test/Profile/def-assignop.cpp<br>
>> >> >> >> >> >> >> >> >> >> +++ test/Profile/def-assignop.cpp<br>
>> >> >> >> >> >> >> >> >> >> @@ -0,0 +1,32 @@<br>
>> >> >> >> >> >> >> >> >> >> +// RUN: %clang_cc1 -x c++ -std=c++11 %s<br>
>> >> >> >> >> >> >> >> >> >> -triple<br>
>> >> >> >> >> >> >> >> >> >> x86_64-unknown-linux-gnu<br>
>> >> >> >> >> >> >> >> >> >> -main-file-name def-assignop.cpp -o -<br>
>> >> >> >> >> >> >> >> >> >> -emit-llvm<br>
>> >> >> >> >> >> >> >> >> >> -fprofile-instrument=clang<br>
>> >> >> >> >> >> >> >> >> >> | FileCheck --check-prefix=PGOGEN %s<br>
>> >> >> >> >> >> >> >> >> >> +// RUN: %clang_cc1 -x c++ -std=c++11 %s<br>
>> >> >> >> >> >> >> >> >> >> -triple<br>
>> >> >> >> >> >> >> >> >> >> x86_64-unknown-linux-gnu<br>
>> >> >> >> >> >> >> >> >> >> -main-file-name def-assignop.cpp -o -<br>
>> >> >> >> >> >> >> >> >> >> -emit-llvm<br>
>> >> >> >> >> >> >> >> >> >> -fprofile-instrument=clang<br>
>> >> >> >> >> >> >> >> >> >> -fcoverage-mapping | FileCheck<br>
>> >> >> >> >> >> >> >> >> >> --check-prefix=COVMAP<br>
>> >> >> >> >> >> >> >> >> >> %s<br>
>> >> >> >> >> >> >> >> >> >> +<br>
>> >> >> >> >> >> >> >> >> >> +struct B {<br>
>> >> >> >> >> >> >> >> >> >> + void operator=(const B &b) {}<br>
>> >> >> >> >> >> >> >> >> >> + void operator=(const B &&b) {}<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > Probably best to make these canonical to avoid<br>
>> >> >> >> >> >> >> >> >> > confusion:<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > B &operator=(const B&);<br>
>> >> >> >> >> >> >> >> >> > B &operator=(B&&);<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > (& they don't need definitions - just<br>
>> >> >> >> >> >> >> >> >> > declarations)<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> Will change.<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > Also, neither of these are the move<br>
>> >> >> >> >> >> >> >> >> > /constructor/,<br>
>> >> >> >> >> >> >> >> >> > just<br>
>> >> >> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> >> >> > move<br>
>> >> >> >> >> >> >> >> >> > operator.<br>
>> >> >> >> >> >> >> >> >> > Not sure if Vedant just used the wrong<br>
>> >> >> >> >> >> >> >> >> > terminology,<br>
>> >> >> >> >> >> >> >> >> > or<br>
>> >> >> >> >> >> >> >> >> > whether<br>
>> >> >> >> >> >> >> >> >> > it's<br>
>> >> >> >> >> >> >> >> >> > worth<br>
>> >> >> >> >> >> >> >> >> > testing the move/copy ctors too, to check that<br>
>> >> >> >> >> >> >> >> >> > they<br>
>> >> >> >> >> >> >> >> >> > do<br>
>> >> >> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> >> >> > right<br>
>> >> >> >> >> >> >> >> >> > thing<br>
>> >> >> >> >> >> >> >> >> > as<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> I added tests for copy ctors, and plan to add move<br>
>> >> >> >> >> >> >> >> >> ctor<br>
>> >> >> >> >> >> >> >> >> test<br>
>> >> >> >> >> >> >> >> >> soon.<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> > well. (if all of these things use the same<br>
>> >> >> >> >> >> >> >> >> > codepath, I<br>
>> >> >> >> >> >> >> >> >> > don't<br>
>> >> >> >> >> >> >> >> >> > see a<br>
>> >> >> >> >> >> >> >> >> > great<br>
>> >> >> >> >> >> >> >> >> > benefit in having separate tests for them (but<br>
>> >> >> >> >> >> >> >> >> > you<br>
>> >> >> >> >> >> >> >> >> > can<br>
>> >> >> >> >> >> >> >> >> > add<br>
>> >> >> >> >> >> >> >> >> > them<br>
>> >> >> >> >> >> >> >> >> > here<br>
>> >> >> >> >> >> >> >> >> > if<br>
>> >> >> >> >> >> >> >> >> > you<br>
>> >> >> >> >> >> >> >> >> > like) - I'm just suggesting a manual<br>
>> >> >> >> >> >> >> >> >> > verification<br>
>> >> >> >> >> >> >> >> >> > in<br>
>> >> >> >> >> >> >> >> >> > case<br>
>> >> >> >> >> >> >> >> >> > those<br>
>> >> >> >> >> >> >> >> >> > need<br>
>> >> >> >> >> >> >> >> >> > a<br>
>> >> >> >> >> >> >> >> >> > separate fix<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> the ctor and assignment op do not share the same<br>
>> >> >> >> >> >> >> >> >> path<br>
>> >> >> >> >> >> >> >> >> --<br>
>> >> >> >> >> >> >> >> >> the<br>
>> >> >> >> >> >> >> >> >> ctor<br>
>> >> >> >> >> >> >> >> >> path<br>
>> >> >> >> >> >> >> >> >> is working as expected without the fix -- or do<br>
>> >> >> >> >> >> >> >> >> you<br>
>> >> >> >> >> >> >> >> >> mean<br>
>> >> >> >> >> >> >> >> >> there<br>
>> >> >> >> >> >> >> >> >> is<br>
>> >> >> >> >> >> >> >> >> no<br>
>> >> >> >> >> >> >> >> >> need to cover both copy and move variants?<br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> > I wouldn't necessarily bother testing multiple<br>
>> >> >> >> >> >> >> >> > instances<br>
>> >> >> >> >> >> >> >> > of<br>
>> >> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> >> > same<br>
>> >> >> >> >> >> >> >> > codepath (so the copy and move ctor for example) -<br>
>> >> >> >> >> >> >> >> > but<br>
>> >> >> >> >> >> >> >> > 2<br>
>> >> >> >> >> >> >> >> > instances<br>
>> >> >> >> >> >> >> >> > is<br>
>> >> >> >> >> >> >> >> > no<br>
>> >> >> >> >> >> >> >> > big<br>
>> >> >> >> >> >> >> >> > deal (if there were several more, I might be<br>
>> >> >> >> >> >> >> >> > inclined<br>
>> >> >> >> >> >> >> >> > to<br>
>> >> >> >> >> >> >> >> > just<br>
>> >> >> >> >> >> >> >> > test<br>
>> >> >> >> >> >> >> >> > one<br>
>> >> >> >> >> >> >> >> > as a<br>
>> >> >> >> >> >> >> >> > representative sample). I don't mind either way,<br>
>> >> >> >> >> >> >> >> > though.<br>
>> >> >> >> >> >> >> >> > The<br>
>> >> >> >> >> >> >> >> > number<br>
>> >> >> >> >> >> >> >> > is<br>
>> >> >> >> >> >> >> >> > small<br>
>> >> >> >> >> >> >> >> > & the test cases are arguably distinct.<br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> Sorry I disagree with your general statement here. I<br>
>> >> >> >> >> >> >> >> treat<br>
>> >> >> >> >> >> >> >> such<br>
>> >> >> >> >> >> >> >> test<br>
>> >> >> >> >> >> >> >> cases as 'black box testing' that do not know about<br>
>> >> >> >> >> >> >> >> the<br>
>> >> >> >> >> >> >> >> internal<br>
>> >> >> >> >> >> >> >> implementation (code path). It may or may not share<br>
>> >> >> >> >> >> >> >> the<br>
>> >> >> >> >> >> >> >> same<br>
>> >> >> >> >> >> >> >> code<br>
>> >> >> >> >> >> >> >> path<br>
>> >> >> >> >> >> >> >> today -- same is true in the future.<br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> > While there's merit in both approaches, practically<br>
>> >> >> >> >> >> >> > speaking<br>
>> >> >> >> >> >> >> > it<br>
>> >> >> >> >> >> >> > seems<br>
>> >> >> >> >> >> >> > difficult to test in that way in general - any feature<br>
>> >> >> >> >> >> >> > could<br>
>> >> >> >> >> >> >> > interact<br>
>> >> >> >> >> >> >> > with<br>
>> >> >> >> >> >> >> > any other.<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> The language features are well specified -- so writing<br>
>> >> >> >> >> >> >> small<br>
>> >> >> >> >> >> >> test<br>
>> >> >> >> >> >> >> cases to cover them is a general accepted way of<br>
>> >> >> >> >> >> >> testing.<br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> > I'm not sure I follow the distinction you're drawing<br>
>> >> >> >> >> >> > between<br>
>> >> >> >> >> >> > the<br>
>> >> >> >> >> >> > middle<br>
>> >> >> >> >> >> > end<br>
>> >> >> >> >> >> > optimization tests and the features you're testing here.<br>
>> >> >> >> >> >> > If<br>
>> >> >> >> >> >> > the<br>
>> >> >> >> >> >> > features<br>
>> >> >> >> >> >> > are<br>
>> >> >> >> >> >> > relatively independent, even within the same API/feature<br>
>> >> >> >> >> >> > area,<br>
>> >> >> >> >> >> > they're<br>
>> >> >> >> >> >> > generally tested independently (even two features within<br>
>> >> >> >> >> >> > a<br>
>> >> >> >> >> >> > single<br>
>> >> >> >> >> >> > middle<br>
>> >> >> >> >> >> > end<br>
>> >> >> >> >> >> > optimization - a test case is written to ensure that,<br>
>> >> >> >> >> >> > say,<br>
>> >> >> >> >> >> > ArgumentPromotion<br>
>> >> >> >> >> >> > correctly handles debug info, and another that it<br>
>> >> >> >> >> >> > correctly<br>
>> >> >> >> >> >> > handles<br>
>> >> >> >> >> >> > inalloca<br>
>> >> >> >> >> >> > (or fp80, etc - just looking at<br>
>> >> >> >> >> >> > test/Transforms/ArgumentPromotion)<br>
>> >> >> >> >> >> > -<br>
>> >> >> >> >> >> > but<br>
>> >> >> >> >> >> > we<br>
>> >> >> >> >> >> > don't test the matrix of combinations of these features)<br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >The LLVM regression suite is far more narrowly targeted<br>
>> >> >> >> >> >> >> > than<br>
>> >> >> >> >> >> >> > that<br>
>> >> >> >> >> >> >> > - we don't test combinations of optimizations, for<br>
>> >> >> >> >> >> >> > example -<br>
>> >> >> >> >> >> >> > we<br>
>> >> >> >> >> >> >> > test<br>
>> >> >> >> >> >> >> > each<br>
>> >> >> >> >> >> >> > optimization in isolation. The same would be true of<br>
>> >> >> >> >> >> >> > two<br>
>> >> >> >> >> >> >> > independent<br>
>> >> >> >> >> >> >> > features on an interface such as this, I think.<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> This is a weakness of the test system -- a problem at a<br>
>> >> >> >> >> >> >> different<br>
>> >> >> >> >> >> >> dimension.<br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> > If we want to have a discussion about the LLVM community<br>
>> >> >> >> >> >> > testing<br>
>> >> >> >> >> >> > methodology, that might be best taken up on llvm-dev (and<br>
>> >> >> >> >> >> > clang-dev).<br>
>> >> >> >> >> >> > But<br>
>> >> >> >> >> >> > for now, I'd ask that tests in the lit regression suite<br>
>> >> >> >> >> >> > are<br>
>> >> >> >> >> >> > generally<br>
>> >> >> >> >> >> > as<br>
>> >> >> >> >> >> > isolated as possible and test one thing at a time.<br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> +};<br>
>> >> >> >> >> >> >> >> >> >> +<br>
>> >> >> >> >> >> >> >> >> >> +struct A {<br>
>> >> >> >> >> >> >> >> >> >> + A &operator=(const A &) = default;<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > Is the fix/codepath specifically about<br>
>> >> >> >> >> >> >> >> >> > explicitly<br>
>> >> >> >> >> >> >> >> >> > defaulted<br>
>> >> >> >> >> >> >> >> >> > ops?<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> yes -- explicitly defaulted. There are some test<br>
>> >> >> >> >> >> >> >> >> coverage<br>
>> >> >> >> >> >> >> >> >> already<br>
>> >> >> >> >> >> >> >> >> for<br>
>> >> >> >> >> >> >> >> >> implicitly declared ctors (but not assignment op<br>
>> >> >> >> >> >> >> >> >> --<br>
>> >> >> >> >> >> >> >> >> probably<br>
>> >> >> >> >> >> >> >> >> worth<br>
>> >> >> >> >> >> >> >> >> adding some testing too).<br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> > Hmm - are you sure there's no common codepath that<br>
>> >> >> >> >> >> >> >> > would<br>
>> >> >> >> >> >> >> >> > cover<br>
>> >> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> >> > explicitly defaulted or implicitly defaulted ops<br>
>> >> >> >> >> >> >> >> > together<br>
>> >> >> >> >> >> >> >> > in<br>
>> >> >> >> >> >> >> >> > one<br>
>> >> >> >> >> >> >> >> > go?<br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> Sorry I am not sure what you mean here.<br>
>> >> >> >> >> >> >> > Is there some part of Clang that is responsible for<br>
>> >> >> >> >> >> >> > generating<br>
>> >> >> >> >> >> >> > both<br>
>> >> >> >> >> >> >> > implicitly defaulted and explicitly defaulted<br>
>> >> >> >> >> >> >> > move/copy<br>
>> >> >> >> >> >> >> > ops<br>
>> >> >> >> >> >> >> > that<br>
>> >> >> >> >> >> >> > could<br>
>> >> >> >> >> >> >> > handle this case, rather than apparently handling the<br>
>> >> >> >> >> >> >> > implicit<br>
>> >> >> >> >> >> >> > and<br>
>> >> >> >> >> >> >> > explicit<br>
>> >> >> >> >> >> >> > cases separately (it seems they're being handled<br>
>> >> >> >> >> >> >> > separately<br>
>> >> >> >> >> >> >> > if<br>
>> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> > implicit<br>
>> >> >> >> >> >> >> > case worked before and you added code (rather than<br>
>> >> >> >> >> >> >> > moving<br>
>> >> >> >> >> >> >> > code)<br>
>> >> >> >> >> >> >> > to<br>
>> >> >> >> >> >> >> > fix<br>
>> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> > explicit case - it sounds like we now have two bits of<br>
>> >> >> >> >> >> >> > code,<br>
>> >> >> >> >> >> >> > one<br>
>> >> >> >> >> >> >> > for<br>
>> >> >> >> >> >> >> > implicit and one for explicit - perhaps there's a<br>
>> >> >> >> >> >> >> > single<br>
>> >> >> >> >> >> >> > bit<br>
>> >> >> >> >> >> >> > of<br>
>> >> >> >> >> >> >> > code<br>
>> >> >> >> >> >> >> > that we<br>
>> >> >> >> >> >> >> > could write that would handle both?)<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> The codegen paths are different -- otherwise as you<br>
>> >> >> >> >> >> >> commented,<br>
>> >> >> >> >> >> >> the<br>
>> >> >> >> >> >> >> implicit case would have been broken too.<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> Refactoring FE code to handle both is probably beyond<br>
>> >> >> >> >> >> >> the<br>
>> >> >> >> >> >> >> scope<br>
>> >> >> >> >> >> >> of<br>
>> >> >> >> >> >> >> this fix. Having a good test case here will exactly<br>
>> >> >> >> >> >> >> help<br>
>> >> >> >> >> >> >> avoid<br>
>> >> >> >> >> >> >> regression if that happens in the future.<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> David<br>
>> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> > - David<br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> David<br>
>> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> > Or just any<br>
>> >> >> >> >> >> >> >> >> > compiler-generated ones? (you could drop these<br>
>> >> >> >> >> >> >> >> >> > lines<br>
>> >> >> >> >> >> >> >> >> > if<br>
>> >> >> >> >> >> >> >> >> > it's<br>
>> >> >> >> >> >> >> >> >> > about<br>
>> >> >> >> >> >> >> >> >> > any<br>
>> >> >> >> >> >> >> >> >> > compiler-generated ones, might be simpler/more<br>
>> >> >> >> >> >> >> >> >> > obvious<br>
>> >> >> >> >> >> >> >> >> > that<br>
>> >> >> >> >> >> >> >> >> > it's<br>
>> >> >> >> >> >> >> >> >> > not<br>
>> >> >> >> >> >> >> >> >> > about<br>
>> >> >> >> >> >> >> >> >> > the "= default" feature)<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> Other compiler generated ones are handled<br>
>> >> >> >> >> >> >> >> >> differently.<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> thanks,<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> David<br>
>> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: define {{.*}}@_ZN1AaSERKS_(<br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: %pgocount = load {{.*}}<br>
>> >> >> >> >> >> >> >> >> >> @__profc__ZN1AaSERKS_<br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: {{.*}}add{{.*}}%pgocount, 1<br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: store{{.*}}@__profc__ZN1AaSERKS_<br>
>> >> >> >> >> >> >> >> >> >> + A &operator=(A &&) = default;<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: define {{.*}}@_ZN1AaSEOS_<br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: %pgocount = load {{.*}}<br>
>> >> >> >> >> >> >> >> >> >> @__profc__ZN1AaSEOS_<br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: {{.*}}add{{.*}}%pgocount, 1<br>
>> >> >> >> >> >> >> >> >> >> + // PGOGEN: store{{.*}}@__profc__ZN1AaSEOS_<br>
>> >> >> >> >> >> >> >> >> >> +<br>
>> >> >> >> >> >> >> >> >> >> + // Check that coverage mapping includes 6<br>
>> >> >> >> >> >> >> >> >> >> function<br>
>> >> >> >> >> >> >> >> >> >> records<br>
>> >> >> >> >> >> >> >> >> >> including<br>
>> >> >> >> >> >> >> >> >> >> the<br>
>> >> >> >> >> >> >> >> >> >> + // defaulted copy and move operators:<br>
>> >> >> >> >> >> >> >> >> >> A::operator=<br>
>> >> >> >> >> >> >> >> >> >> + // COVMAP: @__llvm_coverage_mapping = {{.*}}<br>
>> >> >> >> >> >> >> >> >> >> {<br>
>> >> >> >> >> >> >> >> >> >> {<br>
>> >> >> >> >> >> >> >> >> >> i32,<br>
>> >> >> >> >> >> >> >> >> >> i32,<br>
>> >> >> >> >> >> >> >> >> >> i32,<br>
>> >> >> >> >> >> >> >> >> >> i32<br>
>> >> >> >> >> >> >> >> >> >> },<br>
>> >> >> >> >> >> >> >> >> >> [5 x <{{.*}}>],<br>
>> >> >> >> >> >> >> >> >> >> + B b;<br>
>> >> >> >> >> >> >> >> >> >> +};<br>
>> >> >> >> >> >> >> >> >> >> +<br>
>> >> >> >> >> >> >> >> >> >> +int main() {<br>
>> >> >> >> >> >> >> >> >> >> + A a1, a2;<br>
>> >> >> >> >> >> >> >> >> >> + a1 = a2;<br>
>> >> >> >> >> >> >> >> >> >> + a2 = static_cast<A &&>(a1);<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > An option, though not necessarily better, would<br>
>> >> >> >> >> >> >> >> >> > be<br>
>> >> >> >> >> >> >> >> >> > to<br>
>> >> >> >> >> >> >> >> >> > just<br>
>> >> >> >> >> >> >> >> >> > take<br>
>> >> >> >> >> >> >> >> >> > the<br>
>> >> >> >> >> >> >> >> >> > address<br>
>> >> >> >> >> >> >> >> >> > of the special members:<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > auto (B::*x)(const B&) = &bar::operator=;<br>
>> >> >> >> >> >> >> >> >> > auto (B::*x)(B&&) = &bar::operator=;<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > In short, what I'm picturing, in total:<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > struct A {<br>
>> >> >> >> >> >> >> >> >> > A &operator=(const A&);<br>
>> >> >> >> >> >> >> >> >> > A &operator=(A&&);<br>
>> >> >> >> >> >> >> >> >> > };<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > struct B {<br>
>> >> >> >> >> >> >> >> >> > A a;<br>
>> >> >> >> >> >> >> >> >> > };<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > auto (B::*x)(const B&) = &B::operator=;<br>
>> >> >> >> >> >> >> >> >> > auto (B::*x)(B&&) = &B::operator=;<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> > Also, this test should probably be in clang,<br>
>> >> >> >> >> >> >> >> >> > since<br>
>> >> >> >> >> >> >> >> >> > it's a<br>
>> >> >> >> >> >> >> >> >> > clang<br>
>> >> >> >> >> >> >> >> >> > code<br>
>> >> >> >> >> >> >> >> >> > change/fix.<br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> + return 0;<br>
>> >> >> >> >> >> >> >> >> >> +}<br>
>> >> >> >> >> >> >> >> >> >> Index: lib/CodeGen/CGClass.cpp<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> ===================================================================<br>
>> >> >> >> >> >> >> >> >> >> --- lib/CodeGen/CGClass.cpp<br>
>> >> >> >> >> >> >> >> >> >> +++ lib/CodeGen/CGClass.cpp<br>
>> >> >> >> >> >> >> >> >> >> @@ -1608,6 +1608,7 @@<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> LexicalScope Scope(*this,<br>
>> >> >> >> >> >> >> >> >> >> RootCS->getSourceRange());<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> + incrementProfileCounter(RootCS);<br>
>> >> >> >> >> >> >> >> >> >> AssignmentMemcpyizer AM(*this, AssignOp,<br>
>> >> >> >> >> >> >> >> >> >> Args);<br>
>> >> >> >> >> >> >> >> >> >> for (auto *I : RootCS->body())<br>
>> >> >> >> >> >> >> >> >> >> AM.emitAssignment(I);<br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> _______________________________________________<br>
>> >> >> >> >> >> >> >> >> >> llvm-commits mailing list<br>
>> >> >> >> >> >> >> >> >> >> <a href="mailto:llvm-commits@lists.llvm.org">llvm-commits@lists.llvm.org</a><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> >> <a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits" rel="noreferrer" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits</a><br>
>> >> >> >> >> >> >> >> >> >><br>
>> >> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> >> ><br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> >> ><br>
>> >> >> >> >> ><br>
>> >> >> >> >> ><br>
>> >> >> >> ><br>
>> >> >> >> ><br>
>> >> >> ><br>
>> >> >> ><br>
>> >> ><br>
>> >> ><br>
>> ><br>
>> ><br>
><br>
><br>
</div></div></blockquote></div><br></div></div>