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ast.myr
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ast.myr
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use std
use "ctypes"
use "err"
pkg qc =
type decl = struct
syms : sym#[:]
;;
type func = struct
name : byte[:]
functy : cfunc#
body : stmt#[:]
locals : sym#[:]
params : sym#[:]
lblcnt : int
;;
type stmt = union
`Sdecl decl
`Sexpr expr#
`Sreturn std.option(expr#)
`Sblock stmt#[:]
`Sif ifstmt
`Sfor forstmt
`Swhile whilestmt
`Sdowhile whilestmt
`Slabeled labeledstmt
`Sgoto int
`Sswitch switchstmt
`Sempty
;;
type switchstmt = struct
cases : (int64, int)[:]
expr : expr#
stmt : stmt#
defaultlbl : std.option(int)
breaklbl : int
;;
type ifstmt = struct
cond : expr#
iftrue : stmt#
iffalse : std.option(stmt#)
truelbl : int
falselbl : int
donelbl : int
;;
type forstmt = struct
init : std.option(expr#)
cond : std.option(expr#)
step : std.option(expr#)
stmt : stmt#
condlbl : int
contlbl : int
stmtlbl : int
breaklbl : int
;;
type whilestmt = struct
cond : expr#
stmt : stmt#
contlbl : int
breaklbl : int
stmtlbl : int
;;
type labeledstmt = struct
stmt : stmt#
lbl : int
;;
type syminit = union
`Initexpr expr#
`Initfunc func#
;;
type constval = union
`Constint int64
`Constptr (byte[:], int64)
`Constblob (uint32, ctype, constval)[:]
;;
type expr = union
`Ebinop binop
`Elogop logop
`Erelop relop
`Eptrarith ptrarith
`Eptrdiff ptrdiff
`Eunop unop
`Eassign assign
`Eintlit int64
`Echrlit char
`Ewchrlit char
`Estrlit byte[:]
`Eident sym#
`Eidx index
`Esel selector
`Ecall call
`Ecast cast
`Eincdec incdec
`Esizeof int
`Econd cond
`Einit initlist
;;
type initlist = struct
vals : (uint32, expr#)[:]
;;
type cond = struct
ty : ctype
cond : expr#
iftrue : expr#
iffalse : expr#
truelbl : int
falselbl : int
donelbl : int
;;
type cast = struct
ty : ctype
expr : expr#
;;
type selector = struct
ty : ctype
expr : expr#
off : uint32
;;
type call = struct
functy : cfunc#
func : expr#
args : expr#[:]
;;
type index = struct
ty : ctype
expr : expr#
idx : expr#
;;
type aop = union
`Oasn
`Oaddasn
`Osubasn
`Oborasn
`Obandasn
;;
type bop = union
`Oplus
`Ominus
`Oshl
`Omul
`Odiv
`Omod
`Oxor
`Oor
`Oand
;;
type uop = union
`Olnot
`Obnot
`Oneg
`Oaddr
`Oderef
;;
type incop = union
`Opreinc
`Opredec
`Opostinc
`Opostdec
;;
type logbinop = union
`Olor
`Oland
;;
type relbinop = union
`Oeq
`One
`Olt
`Ogt
`Oge
`Ole
;;
type relop = struct
op : relbinop
l : expr#
r : expr#
;;
type logop = struct
op : logbinop
l : expr#
r : expr#
;;
type incdec = struct
ty : ctype
op : incop
expr : expr#
;;
type binop = struct
ty : ctype
op : bop
l : expr#
r : expr#
;;
type ptrop = union
`Opadd
`Opsub
;;
type ptrarith = struct
op : ptrop
ptr : expr#
amnt : expr#
;;
type ptrdiff = struct
l : expr#
r : expr#
;;
type unop = struct
ty : ctype
op : uop
operand : expr#
;;
type assign = struct
ty : ctype
op : aop
l : expr#
r : expr#
;;
type sclass = union
`Sclassextern
`Sclasslocal
`Sclassglobal
`Sclassstatic
`Sclasstypedef
`Sclassenum
;;
type sym = struct
name : byte[:]
ty : ctype
sc : sclass
init : std.option(syminit)
;;
const nextlbl : (f : func# -> int)
const exprtype : (e : expr# -> ctype)
const exprloc : (e : expr# -> srcloc)
const islval : (e : expr# -> bool)
const stmtloc : (s : stmt# -> srcloc)
;;
// XXX this label count is global until qbe supports func local labels.
var lblcnt = 0
const nextlbl = {f
-> lblcnt++
//-> f.lblcnt++
}
const exprtype = {e
match e
| &(`Econd cond): -> cond.ty
| &(`Ecast cast): -> cast.ty
| &(`Esel sel): -> sel.ty
| &(`Eident sym): -> sym.ty
| &(`Ebinop bop): -> bop.ty
| &(`Eunop uop): -> uop.ty
| &(`Eptrdiff _): -> `Tylong
| &(`Eptrarith arith): -> exprtype(arith.ptr)
| &(`Eassign asn): -> asn.ty
| &(`Eintlit _): -> `Tyint
| &(`Elogop _): -> `Tyint
| &(`Erelop _): -> `Tyint
| &(`Estrlit _): -> `Typtr std.mk(`Tychar)
| &(`Echrlit _): -> `Tychar
| &(`Ewchrlit _): -> `Tyshort
| &(`Eidx idx): -> idx.ty
| &(`Ecall call): -> call.functy.rty
| &(`Eincdec incdec): -> exprtype(incdec.expr)
| &(`Esizeof _): -> `Tyint
;;
}
const exprloc = {e
match e
| &(`Econd _):
| &(`Ecast _):
| &(`Esel _):
| &(`Eident _):
| &(`Ebinop _):
| &(`Eunop _):
| &(`Eptrdiff _):
| &(`Eptrarith _):
| &(`Eassign _):
| &(`Eintlit _):
| &(`Elogop _):
| &(`Erelop _):
| &(`Estrlit _):
| &(`Echrlit _):
| &(`Ewchrlit _):
| &(`Eidx _):
| &(`Ecall _):
| &(`Eincdec _):
| &(`Esizeof _):
;;
-> [.file=[][:], .line=0, .col=0 ]
}
const stmtloc = {s
-> [.file=[][:], .line=0, .col=0 ]
}
const islval = {n
match n#
| `Eunop unop:
match unop.op
| `Oderef: -> true
| _: -> false
;;
| `Eident sym:
match sym.sc
| `Sclassenum: -> false
| _: -> true
;;
| `Eidx _: -> true
| `Esel _: -> true
|_: -> false
;;
}