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Re: [PATCH] C++ space optimization: de-cloning con/de/structors

--On Thursday, August 08, 2002 10:29:39 PM +0100 Jason Merrill <> wrote:

On Thu, 8 Aug 2002 13:43:32 -0700, Richard Henderson <>

On Thu, Aug 08, 2002 at 10:13:06AM -0700, Matt Austern wrote:
In principle, I think you're right.  I'd like to see us put in Stuart's
patch as an intermediate solution...
Stuart's patch at present has ABI impact.  Therefore this is not
Yes, it has ABI impact, but so long as we can guarantee that

1) the name used by the unified *tor won't be used by anything else, and
2) nothing depends on it that doesn't also emit a copy

3) the unified *tor is not put in a COMDAT group with something else
  for which there might exist another copy somewhere else, since then
  the other COMDAT group might be chosen leaving us without the unified

then it should be compatible with other implementations, ours or others'.
Before we do this, we need to get consensus on the ABI committe about
creating a namespace for vendor extensions.  (For example, perhaps all
such names should begin with _ZZ3GNU or something.)  Otherwise, someone
else can reason just as you did above and conclude it is OK for them
to do the same thing -- but with different semantics.

Mark Mitchell      
CodeSourcery, LLC  

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