[LLVMdev] "Not all catch info was assigned to a landing pad!"' failed

[Konstantin Serebryany]

On Tue, May 17, 2011 at 11:54 PM, Duncan Sands <baldrick at free.fr> wrote:

> Hi Kostya,
>
> > My transformation phase inserts an if-the-else construct into a BB.
> > If that BB contains llvm.eh.exception, I get an Assertion at some later
> point:
> >
> > lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp:212:
> > void llvm::FunctionLoweringInfo::clear(): Assertion
> `CatchInfoFound.size() ==
> > CatchInfoLost.size() && "Not all catch info was assigned to a  landing
> pad!"'
> > failed.
> >
> > Is there some rule that forbids splitting BBs with EH?
> > Or maybe something special needs to be done when splitting such BB?
>
> sadly the code generators can only handle the case in which the eh.selector
> call
> is in the landing pad (or in the basic block following it).  I suggest you
> put
> your branch after the calls to eh.exception and eh.selector.
>
Thanks!
--kcc

>
> Ciao, Duncan.
>
> >
> > The code is here:
> >
> http://code.google.com/p/address-sanitizer/source/browse/trunk/llvm/AddressSanitizer.cpp,
> > see splitBlockAndInsertIfThen
> >
> > Thanks,
> >
> > --kcc
> >
> >
> >
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