search for: mcinsts

Hi, I want to encode Loongson ISA initially https://gist.github.com/xiangzhai/8ae6966e2f02a94e180dd16ff1cd60ac gslbx           $2,0($3,$4) It is equivalent to: dadd $1, $3, $4 lb $2,0($1) I just use  mem_simmptr  as the default value of  DAGOperand MO , because  MipsMemAsmOperand  use  parseMemOperand  to parse general  MemOffset  and only *one*  AnyRegister , for example: 0($1) But 

Can someone explain what MCInst is vs. MachineIntr? I'm porting some patches we have here that affect MachineInstrs and am wondering whether I need to make similar changes in MCInst. Why do we have two machine instruction representations? -Dave

On Jul 9, 2009, at 5:34 PM, David Greene wrote: > Can someone explain what MCInst is vs. MachineIntr? Sure. MCInst is designed to be part of the "MC" set of libraries, which is stuff dealing with machine code. We're building a suite of assemblers and disassemblers out of this. MCInst is integral to this plan. For an assembler you have two pieces: 1. "Recognize"

On Friday 10 July 2009 00:19, Chris Lattner wrote: > asmprinter::printInstruction will lower a MachineInstr to an MCInst, > then call the MCInst asmprinter to do the hard formatting work. You > can see a horrible simple skeleton of this idea in > X86ATTAsmPrinter::printMachineInstruction. Yep, that's where I hit the problem. I'm patching the sources for the comment emitter

Dear All, I am following a flow to generate object files(.o) from input (.s assembly) files. The input .s is given to AsmParser, which creates MCInst after matching instruction opcode. These MCInst are converted to MCStream and then finally emitting to an object file using Target Code Emitter. I am considering whether hazard recognition can be done on the list of MCInst, which I get after

Hi, Dear LLVM Dev Group, I am doing an LLVM project aimed to disassemble an ARM ELF binary executable to the MCInst format, inserting some instructions or doing some modification, and re-assemble the MCInst to an ELF binary. As I used the llvm-mc, it seems to only have the option "llvm-mc -disassemble", which reads strings and output strings. Is there any command or function that can

Hi all. I'm looking for some way to do code analysis with LLVM. Can someone please give me a hint, if it is possible to query an MCInst for what are input operands and what are output operands? Small example. Consider we have an instruction: str r1, [sp, #8] Being mapped into MCInst instance it has the following operands: <MCOperand Reg:61> <-- maps to reg r1

Hello Owen, > There should already be sufficient support for what you're trying to do. See > MCOperand::CreateInst(). The concept is that you'll build a composite MCInst in > your AsmPrinter::EmitInstruction() method, which uses Inst-type MCOperands to > hold a list of sub-instructions. Then you call AsmStreamer::EmitInstruction() on the > composite MCInst. Thanks for

Hello all, We're developing an integrated assembler for a VLIW target, and some of the optimizing our assembler needs to do must be done on a per-packet basis. This requires us to be able to traverse instruction within a packet, and one particular optimization requires traversal of previous packets as well. We're considering adding support for MCInst bundles in the MC layer to

Mario, On Nov 29, 2012, at 3:00 PM, Mario Guerra <mariog at codeaurora.org> wrote: > We're developing an integrated assembler for a VLIW target, and some of the > optimizing our assembler needs to do must be done on a per-packet basis. > This requires us to be able to traverse instruction within a packet, and one > particular optimization requires traversal of previous

Mario, On Nov 29, 2012, at 4:04 PM, Mario Guerra <mariog at codeaurora.org> wrote: > Thanks for your reply. This is actually one approach we are considering, but > there are a few issues with it we weren't sure how to address. > > One is that the lifespan of an MCInst seems to be limited to the scope of > AsmPrinter, and we need them to be persistent in order to do a

In r198030 the last in tree backend was converted to use MCInst for printing assembly. I removed support for the old printer in r198959. Out of tree targets have to lower MachineInstr to MCInst to use the new printer. Cheers, Rafael

Cool. I've almost done the disassembly part. Any hint on how to translate from MCInst to ELF binary? E.g., which LLVM tool to use? I only find tools effective on LLVM Bitcode. Thanks so much again. On Wed, Sep 18, 2013 at 7:48 PM, James Courtier-Dutton < james.dutton at gmail.com> wrote: > How about: > http://blog.llvm.org/2010/01/x86-disassembler.html > > This is what

The MCInstrDesc has a method getNumDefs() which tells you how many 'out registers' that MCInst has. The 'out' registers are always at the beginning of the list. You can also use getNumOperands(). Not sure if this is what you are looking for. -----Original Message----- From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Vladimir Pouzanov

Hi, By way of example, I have the following instruction: 44 8b 80 c8 03 00 00 movl 968(%rax), %r8d 1) How is this represented in MCInst? 2) Is there information in MCInst that would tell me which bytes of the instruction are responsible for the 968? The reason I am asking is that I want to work with the bytes disassembled/decoded to an instruction at MCInst level.

Hello everyone, I'm a newbie of llvm. I'm trying to insert Intel MPX instruction BNDCU with BuildMI. I add my machinefunctionpass at addPreEmitPass2. Here is the code of insertion: BuildMI(MBB, MI, DL, TII->get(X86::BNDCU64rr)).addReg(X86::BND2, RegState::Define).addReg(X86::R10); And here is to stack track when I compiler program with modified llc:

On 02.03.2012, at 09:20, Konstantin Vladimirov wrote: > Hi, > > In GCC there is one useful option -dp (or -dP for more verbose output) > to annotate assembler with instruction patterns, that was used when > assembler was generated. For example: The internal "-mllvm -show-mc-inst" option is probably as close as you can get. $ clang -S -O0 test.c -mllvm -show-mc-inst -o

Short version: If the integrated assembler accepted assembly strings as input, more targets could take advantage of integrated assembly. The longer version: For a given assembly statement, my out-of-tree target has complex instruction selection logic -- more so than the in-tree targets. This target uses variable length instructions and a laborious hierarchy of tblgen AsmOperands to do the job.

Hi, I have a question regarding each MCInst. When converting from MCInst to encoded machine code octets, is it possible for an MCInst to produce more than one different set of octets depending on the operands being different? I.e. is there a one to one relationship between MCInst and the encoded machine code bytes? Kind Regards James -------------- next part -------------- An HTML attachment

Hello, There is an issue in the latest Sparc code: while we can encode POPC, decode results in crash in llvm-mc $ echo "popc %g1, %g2" | ./Release+Asserts/bin/llvm-mc -assemble -triple=sparcv9 -show-encoding .text popc %g1, %g2 ! encoding: [0x85,0x70,0x00,0x01] $ echo "0x85,0x70,0x00,0x01"|./Release+Asserts/bin/llvm-mc -disassemble -triple=sparcv9