[LLVMdev] TSFlags in AsmBackend

Steve King steve at metrokings.com
Fri Oct 31 13:47:31 PDT 2014

Thanks, Francois.  Your answer was very helpful and worked fine.
After some experimenting, I wrapped your approach inside a XMCInst()
class defined like so:

namespace llvm {
  class XMCInst : public MCInst {
    const MCInstrDesc& getInstrDesc() const;

Now, anywhere I have an MCInst I can static_cast to XMCInst and get
the MCInstrDesc.

Best Regards,

On Fri, Oct 31, 2014 at 11:16 AM, Francois Pichet <pichet2000 at gmail.com> wrote:
> Not clean but you could add something like this in your AsmBackend:
> namespace llvm {
> extern const MCInstrDesc XInsts[];
> }
> static const MCInstrDesc &getInstDesc(unsigned Opcode) {
>   return XInsts[Opcode];
> }
> (replace X with your target)
> TSFlags will be in MCInstrDesc
> On Fri, Oct 31, 2014 at 1:51 PM, Steve King <steve at metrokings.com> wrote:
>> Hello LLVM,
>> I'd like to check TSFlags in my AsmBackend code.  However AsmBackend
>> objects don't have a reference to MCInstrInfo, which is the only way
>> I've seen to reach TSFlags.  A quickie grep shows that none of the
>> existing targets check TSFlags in their AsmBackends.  Is there any
>> reason I shouldn't check TSFlags in AsmBackend?  If not, what's the
>> best way to go about it?
>> Thanks,
>> -steve
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