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cmd/gc: add commentary to the OXXX constants.
R=rsc, daniel.morsing CC=golang-dev https://golang.org/cl/6495074
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Nigel Tao
parent
ee911c4265
commit
1c675ac89d
233
src/cmd/gc/go.h
233
src/cmd/gc/go.h
@ -399,104 +399,172 @@ struct Hist
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};
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#define H ((Hist*)0)
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// Node ops.
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enum
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{
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OXXX,
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// names
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ONAME,
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ONONAME,
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OTYPE,
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OPACK,
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OLITERAL,
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ONAME, // var, const or func name
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ONONAME, // unnamed arg or return value: f(int, string) (int, error) { etc }
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OTYPE, // type name
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OPACK, // import
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OLITERAL, // literal
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// exprs
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OADD, OSUB, OOR, OXOR, OADDSTR,
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OADDR,
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OANDAND,
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OAPPEND,
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OARRAYBYTESTR, OARRAYRUNESTR,
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OSTRARRAYBYTE, OSTRARRAYRUNE,
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OAS, OAS2, OAS2FUNC, OAS2RECV, OAS2MAPR, OAS2DOTTYPE,
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OASOP,
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OBAD,
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OCALL, OCALLFUNC, OCALLMETH, OCALLINTER,
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OCAP,
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OCLOSE,
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OCLOSURE,
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OCMPIFACE, OCMPSTR,
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OCOMPLIT, OMAPLIT, OSTRUCTLIT, OARRAYLIT, OPTRLIT,
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OCONV, OCONVIFACE, OCONVNOP,
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OCOPY,
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ODCL, ODCLFUNC, ODCLFIELD, ODCLCONST, ODCLTYPE,
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ODELETE,
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ODOT, ODOTPTR, ODOTMETH, ODOTINTER, OXDOT,
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ODOTTYPE,
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ODOTTYPE2,
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OEQ, ONE, OLT, OLE, OGE, OGT,
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OIND,
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OINDEX, OINDEXMAP,
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OKEY, OPARAM,
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OLEN,
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OMAKE, OMAKECHAN, OMAKEMAP, OMAKESLICE,
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OHMUL, ORRC, OLRC, // high-mul and rotate-carry
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OMUL, ODIV, OMOD, OLSH, ORSH, OAND, OANDNOT,
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ONEW,
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ONOT, OCOM, OPLUS, OMINUS,
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OOROR,
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OPANIC, OPRINT, OPRINTN,
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OPAREN,
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OSEND,
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OSLICE, OSLICEARR, OSLICESTR,
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ORECOVER,
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ORECV,
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ORUNESTR,
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OSELRECV,
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OSELRECV2,
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OIOTA,
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OREAL, OIMAG, OCOMPLEX,
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// expressions
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OADD, // x + y
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OSUB, // x - y
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OOR, // x | y
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OXOR, // x ^ y
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OADDSTR, // s + "foo"
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OADDR, // &x
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OANDAND, // b0 && b1
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OAPPEND, // append
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OARRAYBYTESTR, // string(bytes)
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OARRAYRUNESTR, // string(runes)
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OSTRARRAYBYTE, // []byte(s)
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OSTRARRAYRUNE, // []rune(s)
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OAS, // x = y or x := y
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OAS2, // x, y, z = xx, yy, zz
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OAS2FUNC, // x, y = f()
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OAS2RECV, // x, ok = <-c
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OAS2MAPR, // x, ok = m["foo"]
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OAS2DOTTYPE, // x, ok = I.(int)
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OASOP, // x += y
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OBAD, // unused.
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OCALL, // function call, method call or type conversion, possibly preceded by defer or go.
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OCALLFUNC, // f()
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OCALLMETH, // t.Method()
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OCALLINTER, // err.Error()
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OCAP, // cap
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OCLOSE, // close
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OCLOSURE, // f = func() { etc }
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OCMPIFACE, // err1 == err2
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OCMPSTR, // s1 == s2
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OCOMPLIT, // composite literal, typechecking may convert to a more specific OXXXLIT.
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OMAPLIT, // M{"foo":3, "bar":4}
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OSTRUCTLIT, // T{x:3, y:4}
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OARRAYLIT, // [2]int{3, 4}
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OPTRLIT, // &T{x:3, y:4}
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OCONV, // var i int; var u uint; i = int(u)
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OCONVIFACE, // I(t)
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OCONVNOP, // type Int int; var i int; var j Int; i = int(j)
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OCOPY, // copy
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ODCL, // var x int
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ODCLFUNC, // func f() or func (r) f()
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ODCLFIELD, // struct field, interface field, or func/method argument/return value.
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ODCLCONST, // const pi = 3.14
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ODCLTYPE, // type Int int
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ODELETE, // delete
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ODOT, // t.x
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ODOTPTR, // p.x that is implicitly (*p).x
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ODOTMETH, // t.Method
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ODOTINTER, // err.Error
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OXDOT, // t.x, typechecking may convert to a more specific ODOTXXX.
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ODOTTYPE, // e = err.(MyErr)
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ODOTTYPE2, // e, ok = err.(MyErr)
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OEQ, // x == y
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ONE, // x != y
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OLT, // x < y
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OLE, // x <= y
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OGE, // x >= y
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OGT, // x > y
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OIND, // *p
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OINDEX, // a[i]
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OINDEXMAP, // m[s]
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OKEY, // The x:3 in t{x:3, y:4}, the 1:2 in a[1:2], the 2:20 in [3]int{2:20}, etc.
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OPARAM, // The on-stack copy of a parameter or return value that escapes.
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OLEN, // len
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OMAKE, // make, typechecking may convert to a more specfic OMAKEXXX.
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OMAKECHAN, // make(chan int)
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OMAKEMAP, // make(map[string]int)
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OMAKESLICE, // make([]int, 0)
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// stmts
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OBLOCK,
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OBREAK,
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OCASE, OXCASE,
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OCONTINUE,
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ODEFER,
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OEMPTY,
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OFALL, OXFALL,
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OFOR,
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OGOTO,
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OIF,
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OLABEL,
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OPROC,
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ORANGE,
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ORETURN,
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OSELECT,
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OSWITCH,
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OTYPESW, // l = r.(type)
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// TODO: move these to the "for back ends" section, like OLROT.
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OHMUL, // high-mul. 386/amd64: AMUL/AIMUL for unsigned/signed (OMUL uses AIMUL for both).
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ORRC, // right rotate-carry. 386/amd64: ARCR.
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OLRC, // unused.
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OMUL, // x * y
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ODIV, // x / y
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OMOD, // x % y
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OLSH, // x << u
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ORSH, // x >> u
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OAND, // x & y
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OANDNOT, // x &^ y
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ONEW, // new
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ONOT, // !b
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OCOM, // ^x
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OPLUS, // +x
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OMINUS, // -y
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OOROR, // b1 || b2
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OPANIC, // panic
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OPRINT, // print
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OPRINTN, // println
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OPAREN, // (x)
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OSEND, // c <- x
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OSLICE, // v[1:2], typechecking may convert to a more specfic OSLICEXXX.
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OSLICEARR, // a[1:2]
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OSLICESTR, // s[1:2]
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ORECOVER, // recover
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ORECV, // <-c
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ORUNESTR, // string(i)
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OSELRECV, // case x = <-c:
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OSELRECV2, // case x, ok = <-c:
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OIOTA, // iota
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OREAL, // real
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OIMAG, // imag
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OCOMPLEX, // complex
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// statements
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OBLOCK, // block of code
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OBREAK, // break
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OCASE, // case, after being verified by swt.c's casebody.
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OXCASE, // case, before verification.
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OCONTINUE, // continue
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ODEFER, // defer
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OEMPTY, // no-op
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OFALL, // fallthrough, after being verified by swt.c's casebody.
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OXFALL, // fallthrough, before verification.
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OFOR, // for
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OGOTO, // goto
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OIF, // if
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OLABEL, // label:
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OPROC, // go
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ORANGE, // range
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ORETURN, // return
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OSELECT, // select
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OSWITCH, // switch x
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OTYPESW, // switch err.(type)
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// types
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OTCHAN,
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OTMAP,
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OTSTRUCT,
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OTINTER,
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OTFUNC,
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OTARRAY,
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OTPAREN,
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OTCHAN, // chan int
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OTMAP, // map[string]int
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OTSTRUCT, // struct{}
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OTINTER, // interface{}
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OTFUNC, // func()
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OTARRAY, // []int, [8]int, [N]int or [...]int
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OTPAREN, // (T)
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// misc
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ODDD,
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ODDDARG,
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OINLCALL, // intermediary representation of an inlined call
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OEFACE, // itable and data words of empty-interface value
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OITAB, // itable word of interface value
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ODDD, // func f(args ...int) or f(l...) or var a = [...]int{0, 1, 2}.
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ODDDARG, // func f(args ...int), introduced by escape analysis.
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OINLCALL, // intermediary representation of an inlined call.
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OEFACE, // itable and data words of an empty-interface value.
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OITAB, // itable word of an interface value.
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// for back ends
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OCMP, ODEC, OEXTEND, OINC, OREGISTER, OINDREG,
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OLROT,
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OCMP, // compare. 386/amd64: ACMP.
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ODEC, // decrement. 386/amd64: ADEC.
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OEXTEND, // extend. 386/amd64: ACWD/ACDQ/ACQO.
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OINC, // increment. 386/amd64: AINC.
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OREGISTER, // an arch-specific register.
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OINDREG, // offset plus indirect of a register, such as 8(SP).
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OLROT, // rotate left. 386/amd64: AROL.
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OEND,
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};
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enum
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{
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Txxx, // 0
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@ -542,6 +610,7 @@ enum
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NTYPE,
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};
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enum
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{
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CTxxx,
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