[cfe-dev] Getting the value of a IntegerLiteral

[Jesper Eskilson]

On 09/12/2013 04:51 PM, David Blaikie wrote:
>
> Are you using a +asserts build? What kind of crash are you observing?
>

wtd-analyzer: 
/home/jesperes/dev/clang-install/include/llvm/ADT/APInt.h:1316: int64_t 
llvm::APInt::getSExtValue() const: Assertion `getMinSignedBits() <= 64 
&& "Too many bits for int64_t"' failed.
      [exec] Stack dump:
      [exec] 0.    <eof> parser at end of file

Not sure what that means.

On Sep 12, 2013 6:42 AM, "Jesper Eskilson" <jesper.eskilson at iar.com 
<mailto:jesper.eskilson at iar.com>> wrote:
>
>
>     Hi,
>
>     I'm trying to figure out how I can obtain the value of an
>     IntegerLiteral. I tried the following:
>
>     const IntegerLiteral *lit = ...;
>     if (lit != 0)
>     {
>         int64_t n = lit->getValue().getSExtValue();
>         // do something with n
>     }
>
>     This seems to work sometimes, but frequently crashes. I've tried
>     to figure out how to use the Evaluate*-functions in the Expr
>     class, but I cannot figure out how they should be called.
>
>     It's ok if obtaining the value sometimes fails, but it would be
>     nice if it didn't crash. :)
>
>     -- 
>     *Jesper Eskilson* /Development Engineer/
>     IAR Systems AB
>     Box 23051, Strandbodgatan 1
>     SE-750 23 Uppsala, SWEDEN
>     E-mail: jesper.eskilson at iar.com <mailto:jesper.eskilson at iar.com>
>     <mailto:jesper.eskilson at iar.com <mailto:jesper.eskilson at iar.com>>
>     Website: www.iar.com <http://www.iar.com>
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-- 
*Jesper Eskilson* /Development Engineer/
IAR Systems AB
Box 23051, Strandbodgatan 1
SE-750 23 Uppsala, SWEDEN
E-mail: jesper.eskilson at iar.com <mailto:jesper.eskilson at iar.com> 
Website: www.iar.com
<http://www.iar.com> Twitter: www.twitter.com/iarsystems 
<http://www.twitter.com/iarsystems>