[LLVMdev] Attributes & CloneFunctionInto
John Criswell
criswell at illinois.edu
Wed May 15 08:39:33 PDT 2013
On 5/15/13 10:27 AM, Ralf Karrenberg wrote:
> Hi,
>
> I am again struggling to find my way around the Attribute classes.
> What I want to do is clone a function into a declaration where some
> parameters may have a different alignment.
> CloneFunctionInto in debug mode hits an assertion which is marked with
> a FIXME (Attributes.cpp:673).
> I would be totally fine with any kind of workaround, e.g. removing all
> attributes from the target declaration, then cloning, and then setting
> the correct attributes.
> However, I can't find a way to modify an existing alignment *in any
> way* without hitting an assertion (the other one being line 727 for
> removeAttributes). I've also tried using addAttributes() and
> setAttributes() to set the alignment to 0, but this seems to be
> ignored...
SAFECode clones a function to change the alignment of byval arguments.
You can look at the code at
http://llvm.org/viewvc/llvm-project/safecode/branches/release_32/lib/BaggyBoundsChecks/BaggyBoundsChecks.cpp?revision=177641&view=markup.
Note that the code works with LLVM 3.2.
-- John T.
>
> Any help on this? :)
>
> Thanks,
> Ralf
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