Re: Compiler bug with aligned members in virtuals + alloca() in VS

From:
=?Utf-8?B?UmljaEZvcnN0ZXI=?= <RichForster@discussions.microsoft.com>
Newsgroups:
microsoft.public.vc.language
Date:
Tue, 24 Oct 2006 01:33:01 -0700
Message-ID:
<081E5133-6426-44AD-A611-64814E14D69E@microsoft.com>

Why do you need `alloca'? From the short sample you provided
it's not obvious that `alloca' is necessary. It can be
easily replaced by regular `operator new':

virtual bool Application::render()
{
     ClassWithDestructor classWithDestructor;
     std::auto_ptr<int> myInt(new int);
     AlignedMember alignedMember;

     return true;
}

Then, does anyone know what the next step is for submitting
this as a bug to Microsoft?


There is Feedback Connections at MS site. However, I didn't
find anything for VS2003.NET.

"Available Connections"
http://connect.microsoft.com/availableconnections.aspx

HTH
Alex


Hi Alex,

Thanks for your feedback.

I'll totally agree in the contrived example, I don't need alloca() but in
real world situations, the overhead of operator new is excessive relative to
the locality of the allocation and the lifetime of the array. I use the
simple alloca() in the example since it was the minimum case that broke the
compiler.

The connections site doesn't really give me any options for VS 2003/.Net
either. This is pretty much what I found when I was looking into posting this
bug, that there's not a lot of options when it comes to reporting issues with
the older version of VS. For now I'll have to use MSC_VER >= 1400 to check
for VS 2005 to enable code that would cause issues with 2003.

Thanks again,

Rich

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