[LLVMdev] CPU information in the LLVMTargetMachine constructor

[mats petersson]

I'm fairly sure that you want to use `-march=mycpu`.

--
Mats

On 16 April 2015 at 14:07, Romaric Jodin <rjodin at kalray.eu> wrote:
> Hi everyone,
>
> I'm working in a company to port LLVM on their own processors.
> I'm try to support several set of instructions and several architectures.
>
> I'm using the "--target" options to choose my set of instructions, and I would like to use the "-mcpu" to choose the architecture of which I want to compile the code.
> Does it seem right?
>
> But at the moment I cannot manage to have the CPU information in my "LLVMTargetMachine" constructor.
> I have it when I go through llc:
>   clang -emit-llvm ...
>   llc -mcpu=mycpu ...
>
> But not when I go directly from clang
>   clang -mcpu=mycpu
>
> What should I do to have this information in the constructor using only the clang command?
>
> Best Regards,
> Romaric
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