[llvm-commits] CVS: llvm/test/Feature/varargs_new.ll

Andrew Lenharth alenhar2 at cs.uiuc.edu
Sat Jun 18 22:42:18 PDT 2005

On Sat, 2005-06-18 at 22:17 -0500, Chris Lattner wrote:
> Reid: I think this patch should be reverted.  This regression test failing 
> indicates a bug in the auto-upgrader for .ll files.  Imagine if an old 
> LLVM front-end generated this file: now llvm-as would crash on it.

No front end would generate this file.  This is not a bug in the upgrade
code but a matter of what to do on illegal/invalid .ll files.  The
problem here is using oldstyle vaarg with new style va_start (new style
is va_arg, and must be to disambiguate certain legal constructs).

> Not only is this not acceptable from a backwards compatibility 
> perspective, llvm-as should not crash on *any* input.

It already does for similar problems.  try defining llvm.va_start as
taking 5 args.  Verify will hit an assertion.  This is no different than
hitting an arguement number check assertion earlier.

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