[Utils] Add missing freeze and poison keyword highlights

[aqjune]

Summary

This patch adds missing keyword highlights for freeze and poison

[porglezomp]

This looks good to me.

[MaskRay]

LGTM.

llvm/utils/vim/syntax/llvm.vim

 
 " Instructions.
 " The true and false tokens can be used for comparison opcodes, but it's
 " much more common for these tokens to be used for boolean constants.
 syn keyword llvmStatement add addrspacecast alloca and arcp ashr atomicrmw
 syn keyword llvmStatement bitcast br catchpad catchswitch catchret call callbr
 syn keyword llvmStatement cleanuppad cleanupret cmpxchg eq exact extractelement
 syn keyword llvmStatement extractvalue fadd fast fcmp fdiv fence fmul fpext
-syn keyword llvmStatement fptosi fptoui fptrunc free frem fsub fneg getelementptr
+syn keyword llvmStatement fptosi fptoui fptrunc free freeze frem fsub fneg getelementptr
 syn keyword llvmStatement icmp inbounds indirectbr insertelement insertvalue
 syn keyword llvmStatement inttoptr invoke landingpad load lshr malloc max min
 syn keyword llvmStatement mul nand ne ninf nnan nsw nsz nuw oeq oge ogt ole
 syn keyword llvmStatement olt one or ord phi ptrtoint resume ret sdiv select
 syn keyword llvmStatement sext sge sgt shl shufflevector sitofp sle slt srem
 syn keyword llvmStatement store sub switch trunc udiv ueq uge ugt uitofp ule ult
 syn keyword llvmStatement umax umin une uno unreachable unwind urem va_arg
 syn keyword llvmStatement xchg xor zext

llvm/utils/vscode/llvm/syntaxes/ll.tmLanguage.yaml

- match: "\\badd\\b|\
             \\bfence\\b|\
             \\bfmul\\b|\
             \\bfpext\\b|\
             \\bfptosi\\b|\
             \\bfptoui\\b|\
             \\bfptrunc\\b|\
             \\bfree\\b|\
             \\bfrem\\b|\
+            \\bfreeze\\b|\
             \\bfsub\\b|\
             \\bfneg\\b|\
             \\bgetelementptr\\b|\
             \\bicmp\\b|\
             \\binbounds\\b|\
             \\bindirectbr\\b|\
             \\binsertelement\\b|\
             \\binsertvalue\\b|\
- match: "\\b0x\\x+\\b"
     name: constant.numeric.float
   - match: "-?\\b\\d+\\b"
     name: constant.numeric.integer
   - match: "\\btrue\\b|\
             \\bfalse\\b|\
             \\bnull\\b|\
             \\bzeroinitializer\\b|\
             \\bundef\\b|\
+            \\bpoison\\b|\
             \\bnull\\b|\
             \\bnone\\b"
     name: constant.language
   - match: "\\bDW_TAG_[a-z_]+\\b|\
             \\bDW_ATE_[a-zA-Z_]+\\b|\
             \\bDW_OP_[a-zA-Z0-9_]+\\b|\
             \\bDW_LANG_[a-zA-Z0-9_]+\\b|\
             \\bDW_VIRTUALITY_[a-z_]+\\b|\