[cfe-commits] r113962 - in /cfe/trunk: include/clang/AST/ lib/AST/ lib/CodeGen/ lib/Sema/ test/CodeGenCXX/ test/SemaCXX/

[John McCall]

On Sep 15, 2010, at 1:32 PM, Fariborz Jahanian wrote:

> 
> On Sep 15, 2010, at 3:17 AM, John McCall wrote:
> 
>> Fixed log message:
>> 
>> On Sep 15, 2010, at 3:14 AM, John McCall wrote:
>>> URL: http://llvm.org/viewvc/llvm-project?rev=113962&view=rev
>>> Log:
>>> Implement generalized copy elision.  The main obstacle here is that
>>> IR-generation must be much more careful about making sure that exactly
>>> one piece of code is responsible for the lifetime of every aggregate
>>> slot.  The easiest way to do that was to bundle up the information
>>> we care about for aggregate slots into a new structure which demands
>>> that its creators at least consider the question.
>>> 
>>> I could probably be convinced that the ObjC 'needs GC' bit should
>>> be rolled into this structure.
> 
> Makes sense to me. However bits 1 and 0 are already used up. Are you
> OK with adding a bool:1 flag for it? If yes, I will work on it.

Yeah, I don't have any objections to widening the structure.  If you do, you
might as well move the other flags to the new word.

John.