[LLVMdev] Saving a reference to a Basic Block?

[John Slagel]

Sorry for bringing up an old topic, but I was wondering the status? (See
below)
Thanks!!

On Sat, Nov 10, 2012 at 9:41 AM, Caldarale, Charles R <
Chuck.Caldarale at unisys.com> wrote:

> > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
> > On Behalf Of John Slagel
> > Subject: [LLVMdev] Saving a reference to a Basic Block?
>
> > Is there a way to save a reference to a Basic Block that gets all fixed
> > up in the linker, so that you can branch to it during execution?
>
> We use the blockaddress() constant generator, coupled with the indirectbr
> instruction:
>
> http://llvm.org/releases/3.1/docs/LangRef.html#blockaddress
> http://llvm.org/releases/3.1/docs/LangRef.html#i_indirectbr
>
> Note that all target basic blocks of indirectbr must be provided to the
> instruction as part of the IR construction.
>
> Also, at least the x86_64 target for the legacy JIT is missing some
> required functionality for handling blockaddress(); we've fixed that
> locally, but need to check what the MCJIT does before submitting a patch.
>

Has this been resolved?
Thanks!!


>
>  - Chuck
>
>
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