text: /*
  Language: LLVM IR
  Author: Michael Rodler <contact@f0rki.at>
  Description: language used as intermediate representation in the LLVM compiler framework
  Website: https://llvm.org/docs/LangRef.html
  Category: assembler
  Audit: 2020
  */
  
  import * as regex from '../lib/regex.js';
  
  /** @type LanguageFn */
  export default function(hljs) {
    const IDENT_RE = /([-a-zA-Z$._][\w$.-]*)/;
    const TYPE = {
      className: 'type',
      begin: /\bi\d+(?=\s|\b)/
    };
    const OPERATOR = {
      className: 'operator',
      relevance: 0,
      begin: /=/
    };
    const PUNCTUATION = {
      className: 'punctuation',
      relevance: 0,
      begin: /,/
    };
    const NUMBER = {
      className: 'number',
      variants: [
          { begin: /0[xX][a-fA-F0-9]+/ },
          { begin: /-?\d+(?:[.]\d+)?(?:[eE][-+]?\d+(?:[.]\d+)?)?/ }
      ],
      relevance: 0
    };
    const LABEL = {
      className: 'symbol',
      variants: [
          { begin: /^\s*[a-z]+:/ }, // labels
      ],
      relevance: 0
    };
    const VARIABLE = {
      className: 'variable',
      variants: [
        { begin: regex.concat(/%/, IDENT_RE) },
        { begin: /%\d+/ },
        { begin: /#\d+/ },
      ]
    };
    const FUNCTION = {
      className: 'title',
      variants: [
        { begin: regex.concat(/@/, IDENT_RE) },
        { begin: /@\d+/ },
        { begin: regex.concat(/!/, IDENT_RE) },
        { begin: regex.concat(/!\d+/, IDENT_RE) },
        // https://llvm.org/docs/LangRef.html#namedmetadatastructure
        // obviously a single digit can also be used in this fashion
        { begin: /!\d+/ }
      ]
    };
  
    return {
      name: 'LLVM IR',
      // TODO: split into different categories of keywords
      keywords:
        'begin end true false declare define global ' +
        'constant private linker_private internal ' +
        'available_externally linkonce linkonce_odr weak ' +
        'weak_odr appending dllimport dllexport common ' +
        'default hidden protected extern_weak external ' +
        'thread_local zeroinitializer undef null to tail ' +
        'target triple datalayout volatile nuw nsw nnan ' +
        'ninf nsz arcp fast exact inbounds align ' +
        'addrspace section alias module asm sideeffect ' +
        'gc dbg linker_private_weak attributes blockaddress ' +
        'initialexec localdynamic localexec prefix unnamed_addr ' +
        'ccc fastcc coldcc x86_stdcallcc x86_fastcallcc ' +
        'arm_apcscc arm_aapcscc arm_aapcs_vfpcc ptx_device ' +
        'ptx_kernel intel_ocl_bicc msp430_intrcc spir_func ' +
        'spir_kernel x86_64_sysvcc x86_64_win64cc x86_thiscallcc ' +
        'cc c signext zeroext inreg sret nounwind ' +
        'noreturn noalias nocapture byval nest readnone ' +
        'readonly inlinehint noinline alwaysinline optsize ssp ' +
        'sspreq noredzone noimplicitfloat naked builtin cold ' +
        'nobuiltin noduplicate nonlazybind optnone returns_twice ' +
        'sanitize_address sanitize_memory sanitize_thread sspstrong ' +
        'uwtable returned type opaque eq ne slt sgt ' +
        'sle sge ult ugt ule uge oeq one olt ogt ' +
        'ole oge ord uno ueq une x acq_rel acquire ' +
        'alignstack atomic catch cleanup filter inteldialect ' +
        'max min monotonic nand personality release seq_cst ' +
        'singlethread umax umin unordered xchg add fadd ' +
        'sub fsub mul fmul udiv sdiv fdiv urem srem ' +
        'frem shl lshr ashr and or xor icmp fcmp ' +
        'phi call trunc zext sext fptrunc fpext uitofp ' +
        'sitofp fptoui fptosi inttoptr ptrtoint bitcast ' +
        'addrspacecast select va_arg ret br switch invoke ' +
        'unwind unreachable indirectbr landingpad resume ' +
        'malloc alloca free load store getelementptr ' +
        'extractelement insertelement shufflevector getresult ' +
        'extractvalue insertvalue atomicrmw cmpxchg fence ' +
        'argmemonly double',
      contains: [
        TYPE,
        // this matches "empty comments"...
        // ...because it's far more likely this is a statement terminator in
        // another language than an actual comment
        hljs.COMMENT(/;\s*$/, null, { relevance: 0 }),
        hljs.COMMENT(/;/, /$/),
        hljs.QUOTE_STRING_MODE,
        {
          className: 'string',
          variants: [
            // Double-quoted string
            { begin: /"/, end: /[^\\]"/ },
          ]
        },
        FUNCTION,
        PUNCTUATION,
        OPERATOR,
        VARIABLE,
        LABEL,
        NUMBER
      ]
    };
  }
  