[LLVMdev] RFH: passing options from clang down to opt

[Rafael Espíndola]

The option handling in clang in fairly different from opt. The comment
about the mixed name was just a guess as to why you don't see the
driver passing it down to -cc1.

Once that is working, you will probably need to:

* Patch ParseCodeGenArgs to record the option
* Patch EmitAssemblyHelper::CreatePasses to set the option to enable
the  pass in the pass manager (assuming that is the effect you want).


On 1 October 2013 15:48, Diego Novillo <dnovillo at google.com> wrote:
> On Tue, Oct 1, 2013 at 3:42 PM, Rafael Espíndola
> <rafael.espindola at gmail.com> wrote:
>> You are calling the option -auto-profile in some places and
>> -fauto-profile in others. Maybe it is just a typo?
>
> In opt, the option is named '-auto-profile' when I instantiate the pass:
>
> INITIALIZE_PASS(AutoProfile, "auto-profile", "Auto Profile loader", false,
>                 false)
>
> Do I need to name it fauto-profile as well?
>
> I'm also not sure how to schedule the pass at a specific spot in the
> pass manager.  I've looked around for documentation on adding flags,
> but all I found was
> http://llvm.org/docs/WritingAnLLVMPass.html#pass-registration which
> does not seem to discuss this.
>
>
> Diego.