[LLVMdev] TSFlags in AsmBackend (original) (raw)

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 { public: const MCInstrDesc& getInstrDesc() const; }; }

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

Best Regards, -steve

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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