[LLVMdev] Pass llvm options to DragonEgg

[Anitha Boyapati]

Guess, no help? I am left to debug on my own :(
A quick looks shows that dragonegg passes pseudo args to
llvm::cl::ParseCommandLineOptions. After this, it is left to the
commandline parser to crib. Probably the optionsMap is not initialized
properly ..?


On 8 August 2012 16:12, Anitha Boyapati <anitha.boyapati at gmail.com> wrote:
> Hello All,
>
> Another newbie question. I am confused as to what options will work
> with "fplugin-arg-dragonegg-llvm-option" for dragonegg plugin. Readme
> says it is used to pass command-line options to llvm. I shall
> consolidate into 3 questions. For all examples below, I used combo-
> gcc 4.6 + dragonegg(trunk) + llvm(trunk)
>
> (1). Does 'fplugin-arg-dragonegg-llvm-option' allow all 'opt' options?
>
> $ gcc -fplugin=dragonegg.so
> -fplugin-arg-dragonegg-llvm-option='-disable-inlining' foo.c -S
> cc1: Unknown command line argument '-disable-inlining'.  Try: 'cc1 -help'
>
>
> (2). Does 'fplugin-arg-dragonegg-llvm-option' allow ONLY 'opt'
> options? (by llvm options does it mean only opt)
>
>
> (3). Depending on answer to (2), currently is there a way to pass llc
> options to dragonegg? For instance -menable-unsafe-math?
>
>
> $ gcc -fplugin=dragonegg.so
> -fplugin-arg-dragonegg-llvm-option='-menable-unsafe-math' foo.c -S
> cc1: Unknown command line argument '-menable-unsafe-math'.  Try: 'cc1 -help'
>
> The case for passing 'llc' options stems from the requirement that
> code generation is controlled by many llc options(math for example).
> Please correct if the options are wrong.
>
>
>
> --
>  Anitha



-- 
 Anitha