llvm dev - Oct 2013 - [LLVMdev] Are Opcode and register mappings exposed anywhere?

I'm iterating over MCInsts and I'd like to examine particular
instructions. For example, I'd like to look at all x86 CALL64m instructions.
I may be missing something, but it seems like my only option is to use
MCInstPrinter::getOpcodeName and compare strings. (Of course, I could iterate
through the opcodes and build up a table of the ones I'm interested in to
avoid string comparisons.)

Register mappings to names seem to be even worse. It appears you have to go
through MCInstPrinter::printRegName(raw_ostream&, unsigned).

Is there a better way?

-- 
Stephen Checkoway

See the source here:
https://github.com/earl/llvm-mirror/blob/master/lib/Target/X86/InstPrinter/X86IntelInstPrinter.cpp.
It looks like getRegisterName might do what you want, but I don't know
where it's coming from. (Whether it's a function or a member of a super
class. Hopefully, if it's a member, it's public.)

PS Sorry for the duplicate, Stephen. I forgot to CC the list.
On Oct 28, 2013 12:03 PM, "Stephen Checkoway" <s at pahtak.org>
wrote:
> I'm iterating over MCInsts and I'd like to examine particular
> instructions. For example, I'd like to look at all x86 CALL64m
> instructions. I may be missing something, but it seems like my only option
> is to use MCInstPrinter::getOpcodeName and compare strings. (Of course, I
> could iterate through the opcodes and build up a table of the ones I'm
> interested in to avoid string comparisons.)
>
> Register mappings to names seem to be even worse. It appears you have to
> go through MCInstPrinter::printRegName(raw_ostream&, unsigned).
>
> Is there a better way?
>
> --
> Stephen Checkoway
>
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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On Oct 28, 2013, at 2:02 PM, Tyler Hardin <tghardin1 at catamount.wcu.edu>
wrote:
> See the source here:
https://github.com/earl/llvm-mirror/blob/master/lib/Target/X86/InstPrinter/X86IntelInstPrinter.cpp.
It looks like getRegisterName might do what you want, but I don't know where
it's coming from. (Whether it's a function or a member of a super class.
Hopefully, if it's a member, it's public.)
Looks like X86ATTInstPrinter::getRegisterName() and
X86IntelInstPrinter::getRegisterName() are static, public members. It would
still be handy to expose an enum somewhere. This is to support something like:

if (Inst.getOpcode() == X86::CALL64r) {
  if (Inst.getOperand(0).getReg() == X86::RIP) {
    // ...
  }
}

E.g., exposing some of the tablegened enums in X86GenRegisterInfo.inc and
X86GenInstrInfo.inc would be very handy.

Steve
> 
> 
> On Oct 28, 2013 12:03 PM, "Stephen Checkoway" <s at
pahtak.org> wrote:
> I'm iterating over MCInsts and I'd like to examine particular
instructions. For example, I'd like to look at all x86 CALL64m instructions.
I may be missing something, but it seems like my only option is to use
MCInstPrinter::getOpcodeName and compare strings. (Of course, I could iterate
through the opcodes and build up a table of the ones I'm interested in to
avoid string comparisons.)
> 
> Register mappings to names seem to be even worse. It appears you have to go
through MCInstPrinter::printRegName(raw_ostream&, unsigned).
> 
> Is there a better way?
> 
> --
> Stephen Checkoway
> 
> 
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
-- 
Stephen Checkoway