#
#
# The Nim Compiler
# (c) Copyright 2013 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# included from cgen.nim
proc getNullValueAuxT(p: BProc; orig, t: PType; obj, constOrNil: PNode,
result: var Rope; count: var int;
isConst: bool, info: TLineInfo)
# -------------------------- constant expressions ------------------------
proc int64Literal(i: BiggestInt): Rope =
if i > low(int64):
result = "IL64($1)" % [rope(i)]
else:
result = ~"(IL64(-9223372036854775807) - IL64(1))"
proc uint64Literal(i: uint64): Rope = rope($i & "ULL")
proc intLiteral(i: BiggestInt): Rope =
if i > low(int32) and i <= high(int32):
result = rope(i)
elif i == low(int32):
# Nim has the same bug for the same reasons :-)
result = ~"(-2147483647 -1)"
elif i > low(int64):
result = "IL64($1)" % [rope(i)]
else:
result = ~"(IL64(-9223372036854775807) - IL64(1))"
proc intLiteral(i: Int128): Rope =
intLiteral(toInt64(i))
proc genLiteral(p: BProc, n: PNode, ty: PType): Rope =
case n.kind
of nkCharLit..nkUInt64Lit:
var k: TTypeKind
if ty != nil:
k = skipTypes(ty, abstractVarRange).kind
else:
case n.kind
of nkCharLit: k = tyChar
of nkUInt64Lit: k = tyUInt64
of nkInt64Lit: k = tyInt64
else: k = tyNil # don't go into the case variant that uses 'ty'
case k
of tyChar, tyNil:
result = intLiteral(n.intVal)
of tyBool:
if n.intVal != 0: result = ~"NIM_TRUE"
else: result = ~"NIM_FALSE"
of tyInt64: result = int64Literal(n.intVal)
of tyUInt64: result = uint64Literal(uint64(n.intVal))
else:
result = "(($1) $2)" % [getTypeDesc(p.module,
ty), intLiteral(n.intVal)]
of nkNilLit:
let k = if ty == nil: tyPointer else: skipTypes(ty, abstractVarRange).kind
if k == tyProc and skipTypes(ty, abstractVarRange).callConv == ccClosure:
let id = nodeTableTestOrSet(p.module.dataCache, n, p.module.labels)
result = p.module.tmpBase & rope(id)
if id == p.module.labels:
# not found in cache:
inc(p.module.labels)
p.module.s[cfsData].addf(
"static NIM_CONST $1 $2 = {NIM_NIL,NIM_NIL};$n",
[getTypeDesc(p.module, ty), result])
else:
result = rope("NIM_NIL")
of nkStrLit..nkTripleStrLit:
let k = if ty == nil: tyString
else: skipTypes(ty, abstractVarRange + {tyStatic, tyUserTypeClass, tyUserTypeClassInst}).kind
case k
of tyNil:
result = genNilStringLiteral(p.module, n.info)
of tyString:
# with the new semantics for 'nil' strings, we can map "" to nil and
# save tons of allocations:
if n.strVal.len == 0 and optNilSeqs notin p.options and
optSeqDestructors notin p.config.globalOptions:
result = genNilStringLiteral(p.module, n.info)
else:
result = genStringLiteral(p.module, n)
else:
result = makeCString(n.strVal)
of nkFloatLit, nkFloat64Lit:
result = rope(n.floatVal.toStrMaxPrecision)
of nkFloat32Lit:
result = rope(n.floatVal.toStrMaxPrecision("f"))
else:
internalError(p.config, n.info, "genLiteral(" & $n.kind & ')')
result = nil
proc genLiteral(p: BProc, n: PNode): Rope =
result = genLiteral(p, n, n.typ)
proc bitSetToWord(s: TBitSet, size: int): BiggestUInt =
result = 0
for j in 0..<size:
if j < s.len: result = result or (BiggestUInt(s[j]) shl (j * 8))
proc genRawSetData(cs: TBitSet, size: int): Rope =
if size > 8:
var res = "{\n"
for i in 0..<size:
res.add "0x"
res.add "0123456789abcdef"[cs[i] div 16]
res.add "0123456789abcdef"[cs[i] mod 16]
if i < size - 1:
# not last iteration
if i mod 8 == 7:
res.add ",\n"
else:
res.add ", "
else:
res.add "}\n"
result = rope(res)
else:
result = intLiteral(cast[BiggestInt](bitSetToWord(cs, size)))
proc genSetNode(p: BProc, n: PNode): Rope =
var size = int(getSize(p.config, n.typ))
let cs = toBitSet(p.config, n)
if size > 8:
let id = nodeTableTestOrSet(p.module.dataCache, n, p.module.labels)
result = p.module.tmpBase & rope(id)
if id == p.module.labels:
# not found in cache:
inc(p.module.labels)
p.module.s[cfsData].addf("static NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(p.module, n.typ), result, genRawSetData(cs, size)])
else:
result = genRawSetData(cs, size)
proc getStorageLoc(n: PNode): TStorageLoc =
## deadcode
case n.kind
of nkSym:
case n.sym.kind
of skParam, skTemp:
result = OnStack
of skVar, skForVar, skResult, skLet:
if sfGlobal in n.sym.flags: result = OnHeap
else: result = OnStack
of skConst:
if sfGlobal in n.sym.flags: result = OnHeap
else: result = OnUnknown
else: result = OnUnknown
of nkDerefExpr, nkHiddenDeref:
case n[0].typ.kind
of tyVar, tyLent: result = OnUnknown
of tyPtr: result = OnStack
of tyRef: result = OnHeap
else: doAssert(false, "getStorageLoc")
of nkBracketExpr, nkDotExpr, nkObjDownConv, nkObjUpConv:
result = getStorageLoc(n[0])
else: result = OnUnknown
proc canMove(p: BProc, n: PNode; dest: TLoc): bool =
# for now we're conservative here:
if n.kind == nkBracket:
# This needs to be kept consistent with 'const' seq code
# generation!
if not isDeepConstExpr(n) or n.len == 0:
if skipTypes(n.typ, abstractVarRange).kind == tySequence:
return true
elif optNilSeqs notin p.options and
n.kind in nkStrKinds and n.strVal.len == 0:
# Empty strings are codegen'd as NIM_NIL so it's just a pointer copy
return true
result = n.kind in nkCallKinds
#if not result and dest.k == locTemp:
# return true
#if result:
# echo n.info, " optimized ", n
# result = false
proc genRefAssign(p: BProc, dest, src: TLoc) =
if (dest.storage == OnStack and p.config.selectedGC != gcGo) or not usesWriteBarrier(p.config):
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
elif dest.storage == OnHeap:
linefmt(p, cpsStmts, "#asgnRef((void**) $1, $2);$n",
[addrLoc(p.config, dest), rdLoc(src)])
else:
linefmt(p, cpsStmts, "#unsureAsgnRef((void**) $1, $2);$n",
[addrLoc(p.config, dest), rdLoc(src)])
proc asgnComplexity(n: PNode): int =
if n != nil:
case n.kind
of nkSym: result = 1
of nkRecCase:
# 'case objects' are too difficult to inline their assignment operation:
result = 100
of nkRecList:
for t in items(n):
result += asgnComplexity(t)
else: discard
proc optAsgnLoc(a: TLoc, t: PType, field: Rope): TLoc =
assert field != nil
result.k = locField
result.storage = a.storage
result.lode = lodeTyp t
result.r = rdLoc(a) & "." & field
proc genOptAsgnTuple(p: BProc, dest, src: TLoc, flags: TAssignmentFlags) =
let newflags =
if src.storage == OnStatic:
flags + {needToCopy}
elif tfShallow in dest.t.flags:
flags - {needToCopy}
else:
flags
let t = skipTypes(dest.t, abstractInst).getUniqueType()
for i in 0..<t.len:
let t = t[i]
let field = "Field$1" % [i.rope]
genAssignment(p, optAsgnLoc(dest, t, field),
optAsgnLoc(src, t, field), newflags)
proc genOptAsgnObject(p: BProc, dest, src: TLoc, flags: TAssignmentFlags,
t: PNode, typ: PType) =
if t == nil: return
let newflags =
if src.storage == OnStatic:
flags + {needToCopy}
elif tfShallow in dest.t.flags:
flags - {needToCopy}
else:
flags
case t.kind
of nkSym:
let field = t.sym
if field.loc.r == nil: fillObjectFields(p.module, typ)
genAssignment(p, optAsgnLoc(dest, field.typ, field.loc.r),
optAsgnLoc(src, field.typ, field.loc.r), newflags)
of nkRecList:
for child in items(t): genOptAsgnObject(p, dest, src, newflags, child, typ)
else: discard
proc genGenericAsgn(p: BProc, dest, src: TLoc, flags: TAssignmentFlags) =
# Consider:
# type TMyFastString {.shallow.} = string
# Due to the implementation of pragmas this would end up to set the
# tfShallow flag for the built-in string type too! So we check only
# here for this flag, where it is reasonably safe to do so
# (for objects, etc.):
if optSeqDestructors in p.config.globalOptions:
linefmt(p, cpsStmts,
"$1 = $2;$n",
[rdLoc(dest), rdLoc(src)])
elif needToCopy notin flags or
tfShallow in skipTypes(dest.t, abstractVarRange).flags:
if (dest.storage == OnStack and p.config.selectedGC != gcGo) or not usesWriteBarrier(p.config):
linefmt(p, cpsStmts,
"#nimCopyMem((void*)$1, (NIM_CONST void*)$2, sizeof($3));$n",
[addrLoc(p.config, dest), addrLoc(p.config, src), rdLoc(dest)])
else:
linefmt(p, cpsStmts, "#genericShallowAssign((void*)$1, (void*)$2, $3);$n",
[addrLoc(p.config, dest), addrLoc(p.config, src), genTypeInfo(p.module, dest.t, dest.lode.info)])
else:
linefmt(p, cpsStmts, "#genericAssign((void*)$1, (void*)$2, $3);$n",
[addrLoc(p.config, dest), addrLoc(p.config, src), genTypeInfo(p.module, dest.t, dest.lode.info)])
proc genAssignment(p: BProc, dest, src: TLoc, flags: TAssignmentFlags) =
# This function replaces all other methods for generating
# the assignment operation in C.
if src.t != nil and src.t.kind == tyPtr:
# little HACK to support the new 'var T' as return type:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
return
let ty = skipTypes(dest.t, abstractRange + tyUserTypeClasses + {tyStatic})
case ty.kind
of tyRef:
genRefAssign(p, dest, src)
of tySequence:
if optSeqDestructors in p.config.globalOptions:
genGenericAsgn(p, dest, src, flags)
elif (needToCopy notin flags and src.storage != OnStatic) or canMove(p, src.lode, dest):
genRefAssign(p, dest, src)
else:
linefmt(p, cpsStmts, "#genericSeqAssign($1, $2, $3);$n",
[addrLoc(p.config, dest), rdLoc(src),
genTypeInfo(p.module, dest.t, dest.lode.info)])
of tyString:
if optSeqDestructors in p.config.globalOptions:
genGenericAsgn(p, dest, src, flags)
elif (needToCopy notin flags and src.storage != OnStatic) or canMove(p, src.lode, dest):
genRefAssign(p, dest, src)
else:
if (dest.storage == OnStack and p.config.selectedGC != gcGo) or not usesWriteBarrier(p.config):
linefmt(p, cpsStmts, "$1 = #copyString($2);$n", [dest.rdLoc, src.rdLoc])
elif dest.storage == OnHeap:
# we use a temporary to care for the dreaded self assignment:
var tmp: TLoc
getTemp(p, ty, tmp)
linefmt(p, cpsStmts, "$3 = $1; $1 = #copyStringRC1($2);$n",
[dest.rdLoc, src.rdLoc, tmp.rdLoc])
linefmt(p, cpsStmts, "if ($1) #nimGCunrefNoCycle($1);$n", [tmp.rdLoc])
else:
linefmt(p, cpsStmts, "#unsureAsgnRef((void**) $1, #copyString($2));$n",
[addrLoc(p.config, dest), rdLoc(src)])
of tyProc:
if containsGarbageCollectedRef(dest.t):
# optimize closure assignment:
let a = optAsgnLoc(dest, dest.t, "ClE_0".rope)
let b = optAsgnLoc(src, dest.t, "ClE_0".rope)
genRefAssign(p, a, b)
linefmt(p, cpsStmts, "$1.ClP_0 = $2.ClP_0;$n", [rdLoc(dest), rdLoc(src)])
else:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
of tyTuple:
if containsGarbageCollectedRef(dest.t):
if dest.t.len <= 4: genOptAsgnTuple(p, dest, src, flags)
else: genGenericAsgn(p, dest, src, flags)
else:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
of tyObject:
# XXX: check for subtyping?
if ty.isImportedCppType:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
elif not isObjLackingTypeField(ty):
genGenericAsgn(p, dest, src, flags)
elif containsGarbageCollectedRef(ty):
if ty[0].isNil and asgnComplexity(ty.n) <= 4:
discard getTypeDesc(p.module, ty)
internalAssert p.config, ty.n != nil
genOptAsgnObject(p, dest, src, flags, ty.n, ty)
else:
genGenericAsgn(p, dest, src, flags)
else:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
of tyArray:
if containsGarbageCollectedRef(dest.t) and p.config.selectedGC notin {gcArc, gcOrc, gcHooks}:
genGenericAsgn(p, dest, src, flags)
else:
linefmt(p, cpsStmts,
"#nimCopyMem((void*)$1, (NIM_CONST void*)$2, sizeof($3));$n",
[rdLoc(dest), rdLoc(src), getTypeDesc(p.module, dest.t)])
of tyOpenArray, tyVarargs:
# open arrays are always on the stack - really? What if a sequence is
# passed to an open array?
if containsGarbageCollectedRef(dest.t):
linefmt(p, cpsStmts, # XXX: is this correct for arrays?
"#genericAssignOpenArray((void*)$1, (void*)$2, $1Len_0, $3);$n",
[addrLoc(p.config, dest), addrLoc(p.config, src),
genTypeInfo(p.module, dest.t, dest.lode.info)])
else:
linefmt(p, cpsStmts,
# bug #4799, keep the nimCopyMem for a while
#"#nimCopyMem((void*)$1, (NIM_CONST void*)$2, sizeof($1[0])*$1Len_0);$n",
"$1 = $2;$n",
[rdLoc(dest), rdLoc(src)])
of tySet:
if mapType(p.config, ty) == ctArray:
linefmt(p, cpsStmts, "#nimCopyMem((void*)$1, (NIM_CONST void*)$2, $3);$n",
[rdLoc(dest), rdLoc(src), getSize(p.config, dest.t)])
else:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
of tyPtr, tyPointer, tyChar, tyBool, tyEnum, tyCString,
tyInt..tyUInt64, tyRange, tyVar, tyLent, tyNil:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
else: internalError(p.config, "genAssignment: " & $ty.kind)
if optMemTracker in p.options and dest.storage in {OnHeap, OnUnknown}:
#writeStackTrace()
#echo p.currLineInfo, " requesting"
linefmt(p, cpsStmts, "#memTrackerWrite((void*)$1, $2, $3, $4);$n",
[addrLoc(p.config, dest), getSize(p.config, dest.t),
makeCString(toFullPath(p.config, p.currLineInfo)),
p.currLineInfo.safeLineNm])
proc genDeepCopy(p: BProc; dest, src: TLoc) =
template addrLocOrTemp(a: TLoc): Rope =
if a.k == locExpr:
var tmp: TLoc
getTemp(p, a.t, tmp)
genAssignment(p, tmp, a, {})
addrLoc(p.config, tmp)
else:
addrLoc(p.config, a)
var ty = skipTypes(dest.t, abstractVarRange + {tyStatic})
case ty.kind
of tyPtr, tyRef, tyProc, tyTuple, tyObject, tyArray:
# XXX optimize this
linefmt(p, cpsStmts, "#genericDeepCopy((void*)$1, (void*)$2, $3);$n",
[addrLoc(p.config, dest), addrLocOrTemp(src),
genTypeInfo(p.module, dest.t, dest.lode.info)])
of tySequence, tyString:
linefmt(p, cpsStmts, "#genericSeqDeepCopy($1, $2, $3);$n",
[addrLoc(p.config, dest), rdLoc(src),
genTypeInfo(p.module, dest.t, dest.lode.info)])
of tyOpenArray, tyVarargs:
linefmt(p, cpsStmts,
"#genericDeepCopyOpenArray((void*)$1, (void*)$2, $1Len_0, $3);$n",
[addrLoc(p.config, dest), addrLocOrTemp(src),
genTypeInfo(p.module, dest.t, dest.lode.info)])
of tySet:
if mapType(p.config, ty) == ctArray:
linefmt(p, cpsStmts, "#nimCopyMem((void*)$1, (NIM_CONST void*)$2, $3);$n",
[rdLoc(dest), rdLoc(src), getSize(p.config, dest.t)])
else:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
of tyPointer, tyChar, tyBool, tyEnum, tyCString,
tyInt..tyUInt64, tyRange, tyVar, tyLent:
linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(dest), rdLoc(src)])
else: internalError(p.config, "genDeepCopy: " & $ty.kind)
proc putLocIntoDest(p: BProc, d: var TLoc, s: TLoc) =
if d.k != locNone:
if lfNoDeepCopy in d.flags: genAssignment(p, d, s, {})
else: genAssignment(p, d, s, {needToCopy})
else:
d = s # ``d`` is free, so fill it with ``s``
proc putDataIntoDest(p: BProc, d: var TLoc, n: PNode, r: Rope) =
var a: TLoc
if d.k != locNone:
# need to generate an assignment here
initLoc(a, locData, n, OnStatic)
a.r = r
if lfNoDeepCopy in d.flags: genAssignment(p, d, a, {})
else: genAssignment(p, d, a, {needToCopy})
else:
# we cannot call initLoc() here as that would overwrite
# the flags field!
d.k = locData
d.lode = n
d.r = r
proc putIntoDest(p: BProc, d: var TLoc, n: PNode, r: Rope; s=OnUnknown) =
var a: TLoc
if d.k != locNone:
# need to generate an assignment here
initLoc(a, locExpr, n, s)
a.r = r
if lfNoDeepCopy in d.flags: genAssignment(p, d, a, {})
else: genAssignment(p, d, a, {needToCopy})
else:
# we cannot call initLoc() here as that would overwrite
# the flags field!
d.k = locExpr
d.lode = n
d.r = r
proc binaryStmt(p: BProc, e: PNode, d: var TLoc, op: string) =
var a, b: TLoc
if d.k != locNone: internalError(p.config, e.info, "binaryStmt")
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
lineCg(p, cpsStmts, "$1 $2 $3;$n", [rdLoc(a), op, rdLoc(b)])
proc binaryStmtAddr(p: BProc, e: PNode, d: var TLoc, cpname: string) =
var a, b: TLoc
if d.k != locNone: internalError(p.config, e.info, "binaryStmtAddr")
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
lineCg(p, cpsStmts, "#$1($2, $3);$n", [cpname, byRefLoc(p, a), rdLoc(b)])
template unaryStmt(p: BProc, e: PNode, d: var TLoc, frmt: string) =
var a: TLoc
if d.k != locNone: internalError(p.config, e.info, "unaryStmt")
initLocExpr(p, e[1], a)
lineCg(p, cpsStmts, frmt, [rdLoc(a)])
template binaryExpr(p: BProc, e: PNode, d: var TLoc, frmt: string) =
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
putIntoDest(p, d, e, ropecg(p.module, frmt, [rdLoc(a), rdLoc(b)]))
template binaryExprChar(p: BProc, e: PNode, d: var TLoc, frmt: string) =
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
putIntoDest(p, d, e, ropecg(p.module, frmt, [a.rdCharLoc, b.rdCharLoc]))
template unaryExpr(p: BProc, e: PNode, d: var TLoc, frmt: string) =
var a: TLoc
initLocExpr(p, e[1], a)
putIntoDest(p, d, e, ropecg(p.module, frmt, [rdLoc(a)]))
template unaryExprChar(p: BProc, e: PNode, d: var TLoc, frmt: string) =
var a: TLoc
initLocExpr(p, e[1], a)
putIntoDest(p, d, e, ropecg(p.module, frmt, [rdCharLoc(a)]))
template binaryArithOverflowRaw(p: BProc, t: PType, a, b: TLoc;
cpname: string): Rope =
var size = getSize(p.config, t)
let storage = if size < p.config.target.intSize: rope("NI")
else: getTypeDesc(p.module, t)
var result = getTempName(p.module)
linefmt(p, cpsLocals, "$1 $2;$n", [storage, result])
lineCg(p, cpsStmts, "if (#$2($3, $4, &$1)) { #raiseOverflow(); $5};$n",
[result, cpname, rdCharLoc(a), rdCharLoc(b), raiseInstr(p)])
if size < p.config.target.intSize or t.kind in {tyRange, tyEnum}:
linefmt(p, cpsStmts, "if ($1 < $2 || $1 > $3){ #raiseOverflow(); $4}$n",
[result, intLiteral(firstOrd(p.config, t)), intLiteral(lastOrd(p.config, t)),
raiseInstr(p)])
result
proc binaryArithOverflow(p: BProc, e: PNode, d: var TLoc, m: TMagic) =
const
prc: array[mAddI..mPred, string] = [
"nimAddInt", "nimSubInt",
"nimMulInt", "nimDivInt", "nimModInt",
"nimAddInt", "nimSubInt"
]
prc64: array[mAddI..mPred, string] = [
"nimAddInt64", "nimSubInt64",
"nimMulInt64", "nimDivInt64", "nimModInt64",
"nimAddInt64", "nimSubInt64"
]
opr: array[mAddI..mPred, string] = ["+", "-", "*", "/", "%", "+", "-"]
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
# skipping 'range' is correct here as we'll generate a proper range check
# later via 'chckRange'
let t = e.typ.skipTypes(abstractRange)
if optOverflowCheck notin p.options:
let res = "($1)($2 $3 $4)" % [getTypeDesc(p.module, e.typ), rdLoc(a), rope(opr[m]), rdLoc(b)]
putIntoDest(p, d, e, res)
else:
# we handle div by zero here so that we know that the compilerproc's
# result is only for overflows.
if m in {mDivI, mModI}:
linefmt(p, cpsStmts, "if ($1 == 0){ #raiseDivByZero(); $2}$n",
[rdLoc(b), raiseInstr(p)])
let res = binaryArithOverflowRaw(p, t, a, b,
if t.kind == tyInt64: prc64[m] else: prc[m])
putIntoDest(p, d, e, "($#)($#)" % [getTypeDesc(p.module, e.typ), res])
proc unaryArithOverflow(p: BProc, e: PNode, d: var TLoc, m: TMagic) =
var
a: TLoc
t: PType
assert(e[1].typ != nil)
initLocExpr(p, e[1], a)
t = skipTypes(e.typ, abstractRange)
if optOverflowCheck in p.options:
linefmt(p, cpsStmts, "if ($1 == $2){ #raiseOverflow(); $3}$n",
[rdLoc(a), intLiteral(firstOrd(p.config, t)), raiseInstr(p)])
case m
of mUnaryMinusI:
putIntoDest(p, d, e, "((NI$2)-($1))" % [rdLoc(a), rope(getSize(p.config, t) * 8)])
of mUnaryMinusI64:
putIntoDest(p, d, e, "-($1)" % [rdLoc(a)])
of mAbsI:
putIntoDest(p, d, e, "($1 > 0? ($1) : -($1))" % [rdLoc(a)])
else:
assert(false, $m)
proc binaryArith(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
var
a, b: TLoc
s, k: BiggestInt
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
# BUGFIX: cannot use result-type here, as it may be a boolean
s = max(getSize(p.config, a.t), getSize(p.config, b.t)) * 8
k = getSize(p.config, a.t) * 8
template applyFormat(frmt: untyped) =
putIntoDest(p, d, e, frmt % [
rdLoc(a), rdLoc(b), rope(s),
getSimpleTypeDesc(p.module, e.typ), rope(k)]
)
case op
of mAddF64: applyFormat("(($4)($1) + ($4)($2))")
of mSubF64: applyFormat("(($4)($1) - ($4)($2))")
of mMulF64: applyFormat("(($4)($1) * ($4)($2))")
of mDivF64: applyFormat("(($4)($1) / ($4)($2))")
of mShrI: applyFormat("($4)((NU$5)($1) >> (NU$3)($2))")
of mShlI: applyFormat("($4)((NU$3)($1) << (NU$3)($2))")
of mAshrI: applyFormat("($4)((NI$3)($1) >> (NU$3)($2))")
of mBitandI: applyFormat("($4)($1 & $2)")
of mBitorI: applyFormat("($4)($1 | $2)")
of mBitxorI: applyFormat("($4)($1 ^ $2)")
of mMinI: applyFormat("(($1 <= $2) ? $1 : $2)")
of mMaxI: applyFormat("(($1 >= $2) ? $1 : $2)")
of mAddU: applyFormat("($4)((NU$3)($1) + (NU$3)($2))")
of mSubU: applyFormat("($4)((NU$3)($1) - (NU$3)($2))")
of mMulU: applyFormat("($4)((NU$3)($1) * (NU$3)($2))")
of mDivU: applyFormat("($4)((NU$3)($1) / (NU$3)($2))")
of mModU: applyFormat("($4)((NU$3)($1) % (NU$3)($2))")
of mEqI: applyFormat("($1 == $2)")
of mLeI: applyFormat("($1 <= $2)")
of mLtI: applyFormat("($1 < $2)")
of mEqF64: applyFormat("($1 == $2)")
of mLeF64: applyFormat("($1 <= $2)")
of mLtF64: applyFormat("($1 < $2)")
of mLeU: applyFormat("((NU$3)($1) <= (NU$3)($2))")
of mLtU: applyFormat("((NU$3)($1) < (NU$3)($2))")
of mEqEnum: applyFormat("($1 == $2)")
of mLeEnum: applyFormat("($1 <= $2)")
of mLtEnum: applyFormat("($1 < $2)")
of mEqCh: applyFormat("((NU8)($1) == (NU8)($2))")
of mLeCh: applyFormat("((NU8)($1) <= (NU8)($2))")
of mLtCh: applyFormat("((NU8)($1) < (NU8)($2))")
of mEqB: applyFormat("($1 == $2)")
of mLeB: applyFormat("($1 <= $2)")
of mLtB: applyFormat("($1 < $2)")
of mEqRef: applyFormat("($1 == $2)")
of mLePtr: applyFormat("($1 <= $2)")
of mLtPtr: applyFormat("($1 < $2)")
of mXor: applyFormat("($1 != $2)")
else:
assert(false, $op)
proc genEqProc(p: BProc, e: PNode, d: var TLoc) =
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
if a.t.skipTypes(abstractInstOwned).callConv == ccClosure:
putIntoDest(p, d, e,
"($1.ClP_0 == $2.ClP_0 && $1.ClE_0 == $2.ClE_0)" % [rdLoc(a), rdLoc(b)])
else:
putIntoDest(p, d, e, "($1 == $2)" % [rdLoc(a), rdLoc(b)])
proc genIsNil(p: BProc, e: PNode, d: var TLoc) =
let t = skipTypes(e[1].typ, abstractRange)
if t.kind == tyProc and t.callConv == ccClosure:
unaryExpr(p, e, d, "($1.ClP_0 == 0)")
else:
unaryExpr(p, e, d, "($1 == 0)")
proc unaryArith(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
var
a: TLoc
t: PType
assert(e[1].typ != nil)
initLocExpr(p, e[1], a)
t = skipTypes(e.typ, abstractRange)
template applyFormat(frmt: untyped) =
putIntoDest(p, d, e, frmt % [rdLoc(a), rope(getSize(p.config, t) * 8),
getSimpleTypeDesc(p.module, e.typ)])
case op
of mNot:
applyFormat("!($1)")
of mUnaryPlusI:
applyFormat("$1")
of mBitnotI:
applyFormat("($3)((NU$2) ~($1))")
of mUnaryPlusF64:
applyFormat("$1")
of mUnaryMinusF64:
applyFormat("-($1)")
else:
assert false, $op
proc isCppRef(p: BProc; typ: PType): bool {.inline.} =
result = p.module.compileToCpp and
skipTypes(typ, abstractInstOwned).kind in {tyVar} and
tfVarIsPtr notin skipTypes(typ, abstractInstOwned).flags
proc genDeref(p: BProc, e: PNode, d: var TLoc) =
let mt = mapType(p.config, e[0].typ)
if mt in {ctArray, ctPtrToArray} and lfEnforceDeref notin d.flags:
# XXX the amount of hacks for C's arrays is incredible, maybe we should
# simply wrap them in a struct? --> Losing auto vectorization then?
expr(p, e[0], d)
if e[0].typ.skipTypes(abstractInstOwned).kind == tyRef:
d.storage = OnHeap
else:
var a: TLoc
var typ = e[0].typ
if typ.kind in {tyUserTypeClass, tyUserTypeClassInst} and typ.isResolvedUserTypeClass:
typ = typ.lastSon
typ = typ.skipTypes(abstractInstOwned)
if typ.kind in {tyVar} and tfVarIsPtr notin typ.flags and p.module.compileToCpp and e[0].kind == nkHiddenAddr:
initLocExprSingleUse(p, e[0][0], d)
return
else:
initLocExprSingleUse(p, e[0], a)
if d.k == locNone:
# dest = *a; <-- We do not know that 'dest' is on the heap!
# It is completely wrong to set 'd.storage' here, unless it's not yet
# been assigned to.
case typ.kind
of tyRef:
d.storage = OnHeap
of tyVar, tyLent:
d.storage = OnUnknown
if tfVarIsPtr notin typ.flags and p.module.compileToCpp and
e.kind == nkHiddenDeref:
putIntoDest(p, d, e, rdLoc(a), a.storage)
return
of tyPtr:
d.storage = OnUnknown # BUGFIX!
else:
internalError(p.config, e.info, "genDeref " & $typ.kind)
elif p.module.compileToCpp:
if typ.kind in {tyVar} and tfVarIsPtr notin typ.flags and
e.kind == nkHiddenDeref:
putIntoDest(p, d, e, rdLoc(a), a.storage)
return
if mt == ctPtrToArray and lfEnforceDeref in d.flags:
# we lie about the type for better C interop: 'ptr array[3,T]' is
# translated to 'ptr T', but for deref'ing this produces wrong code.
# See tmissingderef. So we get rid of the deref instead. The codegen
# ends up using 'memcpy' for the array assignment,
# so the '&' and '*' cancel out:
putIntoDest(p, d, lodeTyp(a.t[0]), rdLoc(a), a.storage)
else:
putIntoDest(p, d, e, "(*$1)" % [rdLoc(a)], a.storage)
proc genAddr(p: BProc, e: PNode, d: var TLoc) =
# careful 'addr(myptrToArray)' needs to get the ampersand:
if e[0].typ.skipTypes(abstractInstOwned).kind in {tyRef, tyPtr}:
var a: TLoc
initLocExpr(p, e[0], a)
putIntoDest(p, d, e, "&" & a.r, a.storage)
#Message(e.info, warnUser, "HERE NEW &")
elif mapType(p.config, e[0].typ) == ctArray or isCppRef(p, e.typ):
expr(p, e[0], d)
else:
var a: TLoc
initLocExpr(p, e[0], a)
putIntoDest(p, d, e, addrLoc(p.config, a), a.storage)
template inheritLocation(d: var TLoc, a: TLoc) =
if d.k == locNone: d.storage = a.storage
proc genRecordFieldAux(p: BProc, e: PNode, d, a: var TLoc) =
initLocExpr(p, e[0], a)
if e[1].kind != nkSym: internalError(p.config, e.info, "genRecordFieldAux")
d.inheritLocation(a)
discard getTypeDesc(p.module, a.t) # fill the record's fields.loc
proc genTupleElem(p: BProc, e: PNode, d: var TLoc) =
var
a: TLoc
i: int
initLocExpr(p, e[0], a)
let tupType = a.t.skipTypes(abstractInst+{tyVar})
assert tupType.kind == tyTuple
d.inheritLocation(a)
discard getTypeDesc(p.module, a.t) # fill the record's fields.loc
var r = rdLoc(a)
case e[1].kind
of nkIntLit..nkUInt64Lit: i = int(e[1].intVal)
else: internalError(p.config, e.info, "genTupleElem")
r.addf(".Field$1", [rope(i)])
putIntoDest(p, d, e, r, a.storage)
proc lookupFieldAgain(p: BProc, ty: PType; field: PSym; r: var Rope;
resTyp: ptr PType = nil): PSym =
var ty = ty
assert r != nil
while ty != nil:
ty = ty.skipTypes(skipPtrs)
assert(ty.kind in {tyTuple, tyObject})
result = lookupInRecord(ty.n, field.name)
if result != nil:
if resTyp != nil: resTyp[] = ty
break
if not p.module.compileToCpp: r.add(".Sup")
ty = ty[0]
if result == nil: internalError(p.config, field.info, "genCheckedRecordField")
proc genRecordField(p: BProc, e: PNode, d: var TLoc) =
var a: TLoc
genRecordFieldAux(p, e, d, a)
var r = rdLoc(a)
var f = e[1].sym
let ty = skipTypes(a.t, abstractInstOwned + tyUserTypeClasses)
if ty.kind == tyTuple:
# we found a unique tuple type which lacks field information
# so we use Field$i
r.addf(".Field$1", [rope(f.position)])
putIntoDest(p, d, e, r, a.storage)
else:
var rtyp: PType
let field = lookupFieldAgain(p, ty, f, r, addr rtyp)
if field.loc.r == nil and rtyp != nil: fillObjectFields(p.module, rtyp)
if field.loc.r == nil: internalError(p.config, e.info, "genRecordField 3 " & typeToString(ty))
r.addf(".$1", [field.loc.r])
putIntoDest(p, d, e, r, a.storage)
proc genInExprAux(p: BProc, e: PNode, a, b, d: var TLoc)
proc genFieldCheck(p: BProc, e: PNode, obj: Rope, field: PSym) =
var test, u, v: TLoc
for i in 1..<e.len:
var it = e[i]
assert(it.kind in nkCallKinds)
assert(it[0].kind == nkSym)
let op = it[0].sym
if op.magic == mNot: it = it[1]
let disc = it[2].skipConv
assert(disc.kind == nkSym)
initLoc(test, locNone, it, OnStack)
initLocExpr(p, it[1], u)
initLoc(v, locExpr, disc, OnUnknown)
v.r = obj
v.r.add(".")
v.r.add(disc.sym.loc.r)
genInExprAux(p, it, u, v, test)
let msg = genFieldDefect(field, disc.sym)
let strLit = genStringLiteral(p.module, newStrNode(nkStrLit, msg))
if op.magic == mNot:
linefmt(p, cpsStmts,
"if ($1){ #raiseFieldError($2); $3}$n",
[rdLoc(test), strLit, raiseInstr(p)])
else:
linefmt(p, cpsStmts,
"if (!($1)){ #raiseFieldError($2); $3}$n",
[rdLoc(test), strLit, raiseInstr(p)])
proc genCheckedRecordField(p: BProc, e: PNode, d: var TLoc) =
if optFieldCheck in p.options:
var a: TLoc
genRecordFieldAux(p, e[0], d, a)
let ty = skipTypes(a.t, abstractInst + tyUserTypeClasses)
var r = rdLoc(a)
let f = e[0][1].sym
let field = lookupFieldAgain(p, ty, f, r)
if field.loc.r == nil: fillObjectFields(p.module, ty)
if field.loc.r == nil:
internalError(p.config, e.info, "genCheckedRecordField") # generate the checks:
genFieldCheck(p, e, r, field)
r.add(ropecg(p.module, ".$1", [field.loc.r]))
putIntoDest(p, d, e[0], r, a.storage)
else:
genRecordField(p, e[0], d)
proc genUncheckedArrayElem(p: BProc, n, x, y: PNode, d: var TLoc) =
var a, b: TLoc
initLocExpr(p, x, a)
initLocExpr(p, y, b)
d.inheritLocation(a)
putIntoDest(p, d, n, ropecg(p.module, "$1[$2]", [rdLoc(a), rdCharLoc(b)]),
a.storage)
proc genArrayElem(p: BProc, n, x, y: PNode, d: var TLoc) =
var a, b: TLoc
initLocExpr(p, x, a)
initLocExpr(p, y, b)
var ty = skipTypes(a.t, abstractVarRange + abstractPtrs + tyUserTypeClasses)
var first = intLiteral(firstOrd(p.config, ty))
# emit range check:
if optBoundsCheck in p.options and ty.kind != tyUncheckedArray:
if not isConstExpr(y):
# semantic pass has already checked for const index expressions
if firstOrd(p.config, ty) == 0:
if (firstOrd(p.config, b.t) < firstOrd(p.config, ty)) or (lastOrd(p.config, b.t) > lastOrd(p.config, ty)):
linefmt(p, cpsStmts, "if ((NU)($1) > (NU)($2)){ #raiseIndexError2($1, $2); $3}$n",
[rdCharLoc(b), intLiteral(lastOrd(p.config, ty)), raiseInstr(p)])
else:
linefmt(p, cpsStmts, "if ($1 < $2 || $1 > $3){ #raiseIndexError3($1, $2, $3); $4}$n",
[rdCharLoc(b), first, intLiteral(lastOrd(p.config, ty)), raiseInstr(p)])
else:
let idx = getOrdValue(y)
if idx < firstOrd(p.config, ty) or idx > lastOrd(p.config, ty):
localError(p.config, x.info, formatErrorIndexBound(idx, firstOrd(p.config, ty), lastOrd(p.config, ty)))
d.inheritLocation(a)
putIntoDest(p, d, n,
ropecg(p.module, "$1[($2)- $3]", [rdLoc(a), rdCharLoc(b), first]), a.storage)
proc genCStringElem(p: BProc, n, x, y: PNode, d: var TLoc) =
var a, b: TLoc
initLocExpr(p, x, a)
initLocExpr(p, y, b)
inheritLocation(d, a)
putIntoDest(p, d, n,
ropecg(p.module, "$1[$2]", [rdLoc(a), rdCharLoc(b)]), a.storage)
proc genBoundsCheck(p: BProc; arr, a, b: TLoc) =
let ty = skipTypes(arr.t, abstractVarRange)
case ty.kind
of tyOpenArray, tyVarargs:
linefmt(p, cpsStmts,
"if ($2-$1 != -1 && " &
"((NU)($1) >= (NU)($3Len_0) || (NU)($2) >= (NU)($3Len_0))){ #raiseIndexError(); $4}$n",
[rdLoc(a), rdLoc(b), rdLoc(arr), raiseInstr(p)])
of tyArray:
let first = intLiteral(firstOrd(p.config, ty))
linefmt(p, cpsStmts,
"if ($2-$1 != -1 && " &
"($2-$1 < -1 || $1 < $3 || $1 > $4 || $2 < $3 || $2 > $4)){ #raiseIndexError(); $5}$n",
[rdCharLoc(a), rdCharLoc(b), first, intLiteral(lastOrd(p.config, ty)), raiseInstr(p)])
of tySequence, tyString:
linefmt(p, cpsStmts,
"if ($2-$1 != -1 && " &
"((NU)($1) >= (NU)$3 || (NU)($2) >= (NU)$3)){ #raiseIndexError(); $4}$n",
[rdLoc(a), rdLoc(b), lenExpr(p, arr), raiseInstr(p)])
else: discard
proc genOpenArrayElem(p: BProc, n, x, y: PNode, d: var TLoc) =
var a, b: TLoc
initLocExpr(p, x, a)
initLocExpr(p, y, b) # emit range check:
if optBoundsCheck in p.options:
linefmt(p, cpsStmts, "if ((NU)($1) >= (NU)($2Len_0)){ #raiseIndexError2($1,$2Len_0-1); $3}$n",
[rdLoc(b), rdLoc(a), raiseInstr(p)]) # BUGFIX: ``>=`` and not ``>``!
inheritLocation(d, a)
putIntoDest(p, d, n,
ropecg(p.module, "$1[$2]", [rdLoc(a), rdCharLoc(b)]), a.storage)
proc genSeqElem(p: BProc, n, x, y: PNode, d: var TLoc) =
var a, b: TLoc
initLocExpr(p, x, a)
initLocExpr(p, y, b)
var ty = skipTypes(a.t, abstractVarRange)
if ty.kind in {tyRef, tyPtr}:
ty = skipTypes(ty.lastSon, abstractVarRange) # emit range check:
if optBoundsCheck in p.options:
if ty.kind == tyString and not defined(nimNoZeroTerminator):
linefmt(p, cpsStmts,
"if ((NU)($1) > (NU)$2){ #raiseIndexError2($1,$2); $3}$n",
[rdLoc(b), lenExpr(p, a), raiseInstr(p)])
else:
linefmt(p, cpsStmts,
"if ((NU)($1) >= (NU)$2){ #raiseIndexError2($1,$2-1); $3}$n",
[rdLoc(b), lenExpr(p, a), raiseInstr(p)])
if d.k == locNone: d.storage = OnHeap
if skipTypes(a.t, abstractVar).kind in {tyRef, tyPtr}:
a.r = ropecg(p.module, "(*$1)", [a.r])
if lfPrepareForMutation in d.flags and ty.kind == tyString and
optSeqDestructors in p.config.globalOptions:
linefmt(p, cpsStmts, "#nimPrepareStrMutationV2($1);$n", [byRefLoc(p, a)])
putIntoDest(p, d, n,
ropecg(p.module, "$1$3[$2]", [rdLoc(a), rdCharLoc(b), dataField(p)]), a.storage)
proc genBracketExpr(p: BProc; n: PNode; d: var TLoc) =
var ty = skipTypes(n[0].typ, abstractVarRange + tyUserTypeClasses)
if ty.kind in {tyRef, tyPtr}: ty = skipTypes(ty.lastSon, abstractVarRange)
case ty.kind
of tyUncheckedArray: genUncheckedArrayElem(p, n, n[0], n[1], d)
of tyArray: genArrayElem(p, n, n[0], n[1], d)
of tyOpenArray, tyVarargs: genOpenArrayElem(p, n, n[0], n[1], d)
of tySequence, tyString: genSeqElem(p, n, n[0], n[1], d)
of tyCString: genCStringElem(p, n, n[0], n[1], d)
of tyTuple: genTupleElem(p, n, d)
else: internalError(p.config, n.info, "expr(nkBracketExpr, " & $ty.kind & ')')
discard getTypeDesc(p.module, n.typ)
proc isSimpleExpr(n: PNode): bool =
# calls all the way down --> can stay expression based
case n.kind
of nkCallKinds, nkDotExpr, nkPar, nkTupleConstr,
nkObjConstr, nkBracket, nkCurly, nkHiddenDeref, nkDerefExpr, nkHiddenAddr,
nkHiddenStdConv, nkHiddenSubConv, nkConv, nkAddr:
for c in n:
if not isSimpleExpr(c): return false
result = true
of nkStmtListExpr:
for i in 0..<n.len-1:
if n[i].kind notin {nkCommentStmt, nkEmpty}: return false
result = isSimpleExpr(n.lastSon)
else:
if n.isAtom:
result = true
proc genAndOr(p: BProc, e: PNode, d: var TLoc, m: TMagic) =
# how to generate code?
# 'expr1 and expr2' becomes:
# result = expr1
# fjmp result, end
# result = expr2
# end:
# ... (result computed)
# BUGFIX:
# a = b or a
# used to generate:
# a = b
# if a: goto end
# a = a
# end:
# now it generates:
# tmp = b
# if tmp: goto end
# tmp = a
# end:
# a = tmp
when false:
#if isSimpleExpr(e) and p.module.compileToCpp:
var tmpA, tmpB: TLoc
#getTemp(p, e.typ, tmpA)
#getTemp(p, e.typ, tmpB)
initLocExprSingleUse(p, e[1], tmpA)
initLocExprSingleUse(p, e[2], tmpB)
tmpB.k = locExpr
if m == mOr:
tmpB.r = "((" & rdLoc(tmpA) & ")||(" & rdLoc(tmpB) & "))"
else:
tmpB.r = "((" & rdLoc(tmpA) & ")&&(" & rdLoc(tmpB) & "))"
if d.k == locNone:
d = tmpB
else:
genAssignment(p, d, tmpB, {})
else:
var
L: TLabel
tmp: TLoc
getTemp(p, e.typ, tmp) # force it into a temp!
inc p.splitDecls
expr(p, e[1], tmp)
L = getLabel(p)
if m == mOr:
lineF(p, cpsStmts, "if ($1) goto $2;$n", [rdLoc(tmp), L])
else:
lineF(p, cpsStmts, "if (!($1)) goto $2;$n", [rdLoc(tmp), L])
expr(p, e[2], tmp)
fixLabel(p, L)
if d.k == locNone:
d = tmp
else:
genAssignment(p, d, tmp, {}) # no need for deep copying
dec p.splitDecls
proc genEcho(p: BProc, n: PNode) =
# this unusual way of implementing it ensures that e.g. ``echo("hallo", 45)``
# is threadsafe.
internalAssert p.config, n.kind == nkBracket
if p.config.target.targetOS == osGenode:
# echo directly to the Genode LOG session
var args: Rope = nil
var a: TLoc
for it in n.sons:
if it.skipConv.kind == nkNilLit:
args.add(", \"\"")
else:
initLocExpr(p, it, a)
args.add(ropecg(p.module, ", Genode::Cstring($1->data, $1->len)", [rdLoc(a)]))
p.module.includeHeader("<base/log.h>")
p.module.includeHeader("<util/string.h>")
linefmt(p, cpsStmts, """Genode::log(""$1);$n""", [args])
else:
if n.len == 0:
linefmt(p, cpsStmts, "#echoBinSafe(NIM_NIL, $1);$n", [n.len])
else:
var a: TLoc
initLocExpr(p, n, a)
linefmt(p, cpsStmts, "#echoBinSafe($1, $2);$n", [a.rdLoc, n.len])
when false:
p.module.includeHeader("<stdio.h>")
linefmt(p, cpsStmts, "printf($1$2);$n",
makeCString(repeat("%s", n.len) & "\L"), [args])
linefmt(p, cpsStmts, "fflush(stdout);$n", [])
proc gcUsage(conf: ConfigRef; n: PNode) =
if conf.selectedGC == gcNone: message(conf, n.info, warnGcMem, n.renderTree)
proc strLoc(p: BProc; d: TLoc): Rope =
if optSeqDestructors in p.config.globalOptions:
result = byRefLoc(p, d)
else:
result = rdLoc(d)
proc genStrConcat(p: BProc, e: PNode, d: var TLoc) =
# <Nim code>
# s = 'Hello ' & name & ', how do you feel?' & 'z'
#
# <generated C code>
# {
# string tmp0;
# ...
# tmp0 = rawNewString(6 + 17 + 1 + s2->len);
# // we cannot generate s = rawNewString(...) here, because
# // ``s`` may be used on the right side of the expression
# appendString(tmp0, strlit_1);
# appendString(tmp0, name);
# appendString(tmp0, strlit_2);
# appendChar(tmp0, 'z');
# asgn(s, tmp0);
# }
var a, tmp: TLoc
getTemp(p, e.typ, tmp)
var L = 0
var appends: Rope = nil
var lens: Rope = nil
for i in 0..<e.len - 1:
# compute the length expression:
initLocExpr(p, e[i + 1], a)
if skipTypes(e[i + 1].typ, abstractVarRange).kind == tyChar:
inc(L)
appends.add(ropecg(p.module, "#appendChar($1, $2);$n", [strLoc(p, tmp), rdLoc(a)]))
else:
if e[i + 1].kind in {nkStrLit..nkTripleStrLit}:
inc(L, e[i + 1].strVal.len)
else:
lens.add(lenExpr(p, a))
lens.add(" + ")
appends.add(ropecg(p.module, "#appendString($1, $2);$n", [strLoc(p, tmp), rdLoc(a)]))
linefmt(p, cpsStmts, "$1 = #rawNewString($2$3);$n", [tmp.r, lens, L])
p.s(cpsStmts).add appends
if d.k == locNone:
d = tmp
else:
genAssignment(p, d, tmp, {}) # no need for deep copying
gcUsage(p.config, e)
proc genStrAppend(p: BProc, e: PNode, d: var TLoc) =
# <Nim code>
# s &= 'Hello ' & name & ', how do you feel?' & 'z'
# // BUG: what if s is on the left side too?
# <generated C code>
# {
# s = resizeString(s, 6 + 17 + 1 + name->len);
# appendString(s, strlit_1);
# appendString(s, name);
# appendString(s, strlit_2);
# appendChar(s, 'z');
# }
var
a, dest, call: TLoc
appends, lens: Rope
assert(d.k == locNone)
var L = 0
initLocExpr(p, e[1], dest)
for i in 0..<e.len - 2:
# compute the length expression:
initLocExpr(p, e[i + 2], a)
if skipTypes(e[i + 2].typ, abstractVarRange).kind == tyChar:
inc(L)
appends.add(ropecg(p.module, "#appendChar($1, $2);$n",
[strLoc(p, dest), rdLoc(a)]))
else:
if e[i + 2].kind in {nkStrLit..nkTripleStrLit}:
inc(L, e[i + 2].strVal.len)
else:
lens.add(lenExpr(p, a))
lens.add(" + ")
appends.add(ropecg(p.module, "#appendString($1, $2);$n",
[strLoc(p, dest), rdLoc(a)]))
if optSeqDestructors in p.config.globalOptions:
linefmt(p, cpsStmts, "#prepareAdd($1, $2$3);$n",
[byRefLoc(p, dest), lens, L])
else:
initLoc(call, locCall, e, OnHeap)
call.r = ropecg(p.module, "#resizeString($1, $2$3)", [rdLoc(dest), lens, L])
genAssignment(p, dest, call, {})
gcUsage(p.config, e)
p.s(cpsStmts).add appends
proc genSeqElemAppend(p: BProc, e: PNode, d: var TLoc) =
# seq &= x -->
# seq = (typeof seq) incrSeq(&seq->Sup, sizeof(x));
# seq->data[seq->len-1] = x;
var a, b, dest, tmpL, call: TLoc
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
let seqType = skipTypes(e[1].typ, {tyVar})
initLoc(call, locCall, e, OnHeap)
if not p.module.compileToCpp:
const seqAppendPattern = "($2) #incrSeqV3((TGenericSeq*)($1), $3)"
call.r = ropecg(p.module, seqAppendPattern, [rdLoc(a),
getTypeDesc(p.module, e[1].typ),
genTypeInfo(p.module, seqType, e.info)])
else:
const seqAppendPattern = "($2) #incrSeqV3($1, $3)"
call.r = ropecg(p.module, seqAppendPattern, [rdLoc(a),
getTypeDesc(p.module, e[1].typ),
genTypeInfo(p.module, seqType, e.info)])
# emit the write barrier if required, but we can always move here, so
# use 'genRefAssign' for the seq.
genRefAssign(p, a, call)
#if bt != b.t:
# echo "YES ", e.info, " new: ", typeToString(bt), " old: ", typeToString(b.t)
initLoc(dest, locExpr, e[2], OnHeap)
getIntTemp(p, tmpL)
lineCg(p, cpsStmts, "$1 = $2->$3++;$n", [tmpL.r, rdLoc(a), lenField(p)])
dest.r = ropecg(p.module, "$1$3[$2]", [rdLoc(a), tmpL.r, dataField(p)])
genAssignment(p, dest, b, {needToCopy})
gcUsage(p.config, e)
proc genReset(p: BProc, n: PNode) =
var a: TLoc
initLocExpr(p, n[1], a)
specializeReset(p, a)
when false:
linefmt(p, cpsStmts, "#genericReset((void*)$1, $2);$n",
[addrLoc(p.config, a),
genTypeInfo(p.module, skipTypes(a.t, {tyVar}), n.info)])
proc genDefault(p: BProc; n: PNode; d: var TLoc) =
if d.k == locNone: getTemp(p, n.typ, d, needsInit=true)
else: resetLoc(p, d)
proc rawGenNew(p: BProc, a: var TLoc, sizeExpr: Rope; needsInit: bool) =
var sizeExpr = sizeExpr
let typ = a.t
var b: TLoc
initLoc(b, locExpr, a.lode, OnHeap)
let refType = typ.skipTypes(abstractInstOwned)
assert refType.kind == tyRef
let bt = refType.lastSon
if sizeExpr.isNil:
sizeExpr = "sizeof($1)" % [getTypeDesc(p.module, bt)]
if optTinyRtti in p.config.globalOptions:
if needsInit:
b.r = ropecg(p.module, "($1) #nimNewObj($2)",
[getTypeDesc(p.module, typ), sizeExpr])
else:
b.r = ropecg(p.module, "($1) #nimNewObjUninit($2)",
[getTypeDesc(p.module, typ), sizeExpr])
genAssignment(p, a, b, {})
else:
let ti = genTypeInfo(p.module, typ, a.lode.info)
if bt.destructor != nil and not isTrivialProc(bt.destructor):
# the prototype of a destructor is ``=destroy(x: var T)`` and that of a
# finalizer is: ``proc (x: ref T) {.nimcall.}``. We need to check the calling
# convention at least:
if bt.destructor.typ == nil or bt.destructor.typ.callConv != ccDefault:
localError(p.module.config, a.lode.info,
"the destructor that is turned into a finalizer needs " &
"to have the 'nimcall' calling convention")
var f: TLoc
initLocExpr(p, newSymNode(bt.destructor), f)
p.module.s[cfsTypeInit3].addf("$1->finalizer = (void*)$2;$n", [ti, rdLoc(f)])
if a.storage == OnHeap and usesWriteBarrier(p.config):
if canFormAcycle(a.t):
linefmt(p, cpsStmts, "if ($1) { #nimGCunrefRC1($1); $1 = NIM_NIL; }$n", [a.rdLoc])
else:
linefmt(p, cpsStmts, "if ($1) { #nimGCunrefNoCycle($1); $1 = NIM_NIL; }$n", [a.rdLoc])
if p.config.selectedGC == gcGo:
# newObjRC1() would clash with unsureAsgnRef() - which is used by gcGo to
# implement the write barrier
b.r = ropecg(p.module, "($1) #newObj($2, $3)", [getTypeDesc(p.module, typ), ti, sizeExpr])
linefmt(p, cpsStmts, "#unsureAsgnRef((void**) $1, $2);$n",
[addrLoc(p.config, a), b.rdLoc])
else:
# use newObjRC1 as an optimization
b.r = ropecg(p.module, "($1) #newObjRC1($2, $3)", [getTypeDesc(p.module, typ), ti, sizeExpr])
linefmt(p, cpsStmts, "$1 = $2;$n", [a.rdLoc, b.rdLoc])
else:
b.r = ropecg(p.module, "($1) #newObj($2, $3)", [getTypeDesc(p.module, typ), ti, sizeExpr])
genAssignment(p, a, b, {})
# set the object type:
genObjectInit(p, cpsStmts, bt, a, constructRefObj)
proc genNew(p: BProc, e: PNode) =
var a: TLoc
initLocExpr(p, e[1], a)
# 'genNew' also handles 'unsafeNew':
if e.len == 3:
var se: TLoc
initLocExpr(p, e[2], se)
rawGenNew(p, a, se.rdLoc, needsInit = true)
else:
rawGenNew(p, a, nil, needsInit = true)
gcUsage(p.config, e)
proc genNewSeqAux(p: BProc, dest: TLoc, length: Rope; lenIsZero: bool) =
let seqtype = skipTypes(dest.t, abstractVarRange)
var call: TLoc
initLoc(call, locExpr, dest.lode, OnHeap)
if dest.storage == OnHeap and usesWriteBarrier(p.config):
if canFormAcycle(dest.t):
linefmt(p, cpsStmts, "if ($1) { #nimGCunrefRC1($1); $1 = NIM_NIL; }$n", [dest.rdLoc])
else:
linefmt(p, cpsStmts, "if ($1) { #nimGCunrefNoCycle($1); $1 = NIM_NIL; }$n", [dest.rdLoc])
if not lenIsZero:
if p.config.selectedGC == gcGo:
# we need the write barrier
call.r = ropecg(p.module, "($1) #newSeq($2, $3)", [getTypeDesc(p.module, seqtype),
genTypeInfo(p.module, seqtype, dest.lode.info), length])
linefmt(p, cpsStmts, "#unsureAsgnRef((void**) $1, $2);$n", [addrLoc(p.config, dest), call.rdLoc])
else:
call.r = ropecg(p.module, "($1) #newSeqRC1($2, $3)", [getTypeDesc(p.module, seqtype),
genTypeInfo(p.module, seqtype, dest.lode.info), length])
linefmt(p, cpsStmts, "$1 = $2;$n", [dest.rdLoc, call.rdLoc])
else:
if lenIsZero:
call.r = rope"NIM_NIL"
else:
call.r = ropecg(p.module, "($1) #newSeq($2, $3)", [getTypeDesc(p.module, seqtype),
genTypeInfo(p.module, seqtype, dest.lode.info), length])
genAssignment(p, dest, call, {})
proc genNewSeq(p: BProc, e: PNode) =
var a, b: TLoc
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
if optSeqDestructors in p.config.globalOptions:
let seqtype = skipTypes(e[1].typ, abstractVarRange)
linefmt(p, cpsStmts, "$1.len = $2; $1.p = ($4*) #newSeqPayload($2, sizeof($3), NIM_ALIGNOF($3));$n",
[a.rdLoc, b.rdLoc,
getTypeDesc(p.module, seqtype.lastSon),
getSeqPayloadType(p.module, seqtype)])
else:
let lenIsZero = optNilSeqs notin p.options and
e[2].kind == nkIntLit and e[2].intVal == 0
genNewSeqAux(p, a, b.rdLoc, lenIsZero)
gcUsage(p.config, e)
proc genNewSeqOfCap(p: BProc; e: PNode; d: var TLoc) =
let seqtype = skipTypes(e.typ, abstractVarRange)
var a: TLoc
initLocExpr(p, e[1], a)
if optSeqDestructors in p.config.globalOptions:
if d.k == locNone: getTemp(p, e.typ, d, needsInit=false)
linefmt(p, cpsStmts, "$1.len = 0; $1.p = ($4*) #newSeqPayload($2, sizeof($3), NIM_ALIGNOF($3));$n",
[d.rdLoc, a.rdLoc, getTypeDesc(p.module, seqtype.lastSon),
getSeqPayloadType(p.module, seqtype),
])
else:
putIntoDest(p, d, e, ropecg(p.module,
"($1)#nimNewSeqOfCap($2, $3)", [
getTypeDesc(p.module, seqtype),
genTypeInfo(p.module, seqtype, e.info), a.rdLoc]))
gcUsage(p.config, e)
proc rawConstExpr(p: BProc, n: PNode; d: var TLoc) =
let t = n.typ
discard getTypeDesc(p.module, t) # so that any fields are initialized
let id = nodeTableTestOrSet(p.module.dataCache, n, p.module.labels)
fillLoc(d, locData, n, p.module.tmpBase & rope(id), OnStatic)
if id == p.module.labels:
# expression not found in the cache:
inc(p.module.labels)
p.module.s[cfsData].addf("static NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(p.module, t), d.r, genBracedInit(p, n, isConst = true)])
proc handleConstExpr(p: BProc, n: PNode, d: var TLoc): bool =
if d.k == locNone and n.len > ord(n.kind == nkObjConstr) and n.isDeepConstExpr:
rawConstExpr(p, n, d)
result = true
else:
result = false
proc genObjConstr(p: BProc, e: PNode, d: var TLoc) =
#echo rendertree e, " ", e.isDeepConstExpr
# inheritance in C++ does not allow struct initialization so
# we skip this step here:
if not p.module.compileToCpp and optSeqDestructors notin p.config.globalOptions:
# disabled optimization: it is wrong for C++ and now also
# causes trouble for --gc:arc, see bug #13240
#[
var box: seq[Thing]
for i in 0..3:
box.add Thing(s1: "121") # pass by sink can mutate Thing.
]#
if handleConstExpr(p, e, d): return
var t = e.typ.skipTypes(abstractInstOwned)
let isRef = t.kind == tyRef
# check if we need to construct the object in a temporary
var useTemp =
isRef or
(d.k notin {locTemp,locLocalVar,locGlobalVar,locParam,locField}) or
(isPartOf(d.lode, e) != arNo)
var tmp: TLoc
var r: Rope
if useTemp:
getTemp(p, t, tmp)
r = rdLoc(tmp)
if isRef:
rawGenNew(p, tmp, nil, needsInit = nfAllFieldsSet notin e.flags)
t = t.lastSon.skipTypes(abstractInstOwned)
r = "(*$1)" % [r]
gcUsage(p.config, e)
else:
constructLoc(p, tmp)
else:
resetLoc(p, d)
r = rdLoc(d)
discard getTypeDesc(p.module, t)
let ty = getUniqueType(t)
for i in 1..<e.len:
let it = e[i]
var tmp2: TLoc
tmp2.r = r
let field = lookupFieldAgain(p, ty, it[0].sym, tmp2.r)
if field.loc.r == nil: fillObjectFields(p.module, ty)
if field.loc.r == nil: internalError(p.config, e.info, "genObjConstr")
if it.len == 3 and optFieldCheck in p.options:
genFieldCheck(p, it[2], r, field)
tmp2.r.add(".")
tmp2.r.add(field.loc.r)
if useTemp:
tmp2.k = locTemp
tmp2.storage = if isRef: OnHeap else: OnStack
else:
tmp2.k = d.k
tmp2.storage = if isRef: OnHeap else: d.storage
tmp2.lode = it[1]
expr(p, it[1], tmp2)
if useTemp:
if d.k == locNone:
d = tmp
else:
genAssignment(p, d, tmp, {})
proc lhsDoesAlias(a, b: PNode): bool =
for y in b:
if isPartOf(a, y) != arNo: return true
proc genSeqConstr(p: BProc, n: PNode, d: var TLoc) =
var arr, tmp: TLoc
# bug #668
let doesAlias = lhsDoesAlias(d.lode, n)
let dest = if doesAlias: addr(tmp) else: addr(d)
if doesAlias:
getTemp(p, n.typ, tmp)
elif d.k == locNone:
getTemp(p, n.typ, d)
let l = intLiteral(n.len)
if optSeqDestructors in p.config.globalOptions:
let seqtype = n.typ
linefmt(p, cpsStmts, "$1.len = $2; $1.p = ($4*) #newSeqPayload($2, sizeof($3), NIM_ALIGNOF($3));$n",
[rdLoc dest[], l, getTypeDesc(p.module, seqtype.lastSon),
getSeqPayloadType(p.module, seqtype)])
else:
# generate call to newSeq before adding the elements per hand:
genNewSeqAux(p, dest[], l,
optNilSeqs notin p.options and n.len == 0)
for i in 0..<n.len:
initLoc(arr, locExpr, n[i], OnHeap)
arr.r = ropecg(p.module, "$1$3[$2]", [rdLoc(dest[]), intLiteral(i), dataField(p)])
arr.storage = OnHeap # we know that sequences are on the heap
expr(p, n[i], arr)
gcUsage(p.config, n)
if doesAlias:
if d.k == locNone:
d = tmp
else:
genAssignment(p, d, tmp, {})
proc genArrToSeq(p: BProc, n: PNode, d: var TLoc) =
var elem, a, arr: TLoc
if n[1].kind == nkBracket:
n[1].typ = n.typ
genSeqConstr(p, n[1], d)
return
if d.k == locNone:
getTemp(p, n.typ, d)
# generate call to newSeq before adding the elements per hand:
let L = toInt(lengthOrd(p.config, n[1].typ))
if optSeqDestructors in p.config.globalOptions:
let seqtype = n.typ
linefmt(p, cpsStmts, "$1.len = $2; $1.p = ($4*) #newSeqPayload($2, sizeof($3), NIM_ALIGNOF($3));$n",
[rdLoc d, L, getTypeDesc(p.module, seqtype.lastSon),
getSeqPayloadType(p.module, seqtype)])
else:
genNewSeqAux(p, d, intLiteral(L), optNilSeqs notin p.options and L == 0)
initLocExpr(p, n[1], a)
# bug #5007; do not produce excessive C source code:
if L < 10:
for i in 0..<L:
initLoc(elem, locExpr, lodeTyp elemType(skipTypes(n.typ, abstractInst)), OnHeap)
elem.r = ropecg(p.module, "$1$3[$2]", [rdLoc(d), intLiteral(i), dataField(p)])
elem.storage = OnHeap # we know that sequences are on the heap
initLoc(arr, locExpr, lodeTyp elemType(skipTypes(n[1].typ, abstractInst)), a.storage)
arr.r = ropecg(p.module, "$1[$2]", [rdLoc(a), intLiteral(i)])
genAssignment(p, elem, arr, {needToCopy})
else:
var i: TLoc
getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyInt), i)
linefmt(p, cpsStmts, "for ($1 = 0; $1 < $2; $1++) {$n", [i.r, L])
initLoc(elem, locExpr, lodeTyp elemType(skipTypes(n.typ, abstractInst)), OnHeap)
elem.r = ropecg(p.module, "$1$3[$2]", [rdLoc(d), rdLoc(i), dataField(p)])
elem.storage = OnHeap # we know that sequences are on the heap
initLoc(arr, locExpr, lodeTyp elemType(skipTypes(n[1].typ, abstractInst)), a.storage)
arr.r = ropecg(p.module, "$1[$2]", [rdLoc(a), rdLoc(i)])
genAssignment(p, elem, arr, {needToCopy})
lineF(p, cpsStmts, "}$n", [])
proc genNewFinalize(p: BProc, e: PNode) =
var
a, b, f: TLoc
refType, bt: PType
ti: Rope
refType = skipTypes(e[1].typ, abstractVarRange)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], f)
initLoc(b, locExpr, a.lode, OnHeap)
ti = genTypeInfo(p.module, refType, e.info)
p.module.s[cfsTypeInit3].addf("$1->finalizer = (void*)$2;$n", [ti, rdLoc(f)])
b.r = ropecg(p.module, "($1) #newObj($2, sizeof($3))", [
getTypeDesc(p.module, refType),
ti, getTypeDesc(p.module, skipTypes(refType.lastSon, abstractRange))])
genAssignment(p, a, b, {}) # set the object type:
bt = skipTypes(refType.lastSon, abstractRange)
genObjectInit(p, cpsStmts, bt, a, constructRefObj)
gcUsage(p.config, e)
proc genOfHelper(p: BProc; dest: PType; a: Rope; info: TLineInfo): Rope =
if optTinyRtti in p.config.globalOptions:
result = ropecg(p.module, "#isObj($1.m_type, $2)",
[a, genTypeInfo2Name(p.module, dest)])
else:
# unfortunately 'genTypeInfo' sets tfObjHasKids as a side effect, so we
# have to call it here first:
let ti = genTypeInfo(p.module, dest, info)
if tfFinal in dest.flags or (objHasKidsValid in p.module.flags and
tfObjHasKids notin dest.flags):
result = "$1.m_type == $2" % [a, ti]
else:
discard cgsym(p.module, "TNimType")
inc p.module.labels
let cache = "Nim_OfCheck_CACHE" & p.module.labels.rope
p.module.s[cfsVars].addf("static TNimType* $#[2];$n", [cache])
result = ropecg(p.module, "#isObjWithCache($#.m_type, $#, $#)", [a, ti, cache])
when false:
# former version:
result = ropecg(p.module, "#isObj($1.m_type, $2)",
[a, genTypeInfo(p.module, dest, info)])
proc genOf(p: BProc, x: PNode, typ: PType, d: var TLoc) =
var a: TLoc
initLocExpr(p, x, a)
var dest = skipTypes(typ, typedescPtrs)
var r = rdLoc(a)
var nilCheck: Rope = nil
var t = skipTypes(a.t, abstractInstOwned)
while t.kind in {tyVar, tyLent, tyPtr, tyRef}:
if t.kind notin {tyVar, tyLent}: nilCheck = r
if t.kind notin {tyVar, tyLent} or not p.module.compileToCpp:
r = ropecg(p.module, "(*$1)", [r])
t = skipTypes(t.lastSon, typedescInst+{tyOwned})
discard getTypeDesc(p.module, t)
if not p.module.compileToCpp:
while t.kind == tyObject and t[0] != nil:
r.add(~".Sup")
t = skipTypes(t[0], skipPtrs)
if isObjLackingTypeField(t):
globalError(p.config, x.info,
"no 'of' operator available for pure objects")
if nilCheck != nil:
r = ropecg(p.module, "(($1) && ($2))", [nilCheck, genOfHelper(p, dest, r, x.info)])
else:
r = ropecg(p.module, "($1)", [genOfHelper(p, dest, r, x.info)])
putIntoDest(p, d, x, r, a.storage)
proc genOf(p: BProc, n: PNode, d: var TLoc) =
genOf(p, n[1], n[2].typ, d)
proc genRepr(p: BProc, e: PNode, d: var TLoc) =
if optTinyRtti in p.config.globalOptions:
localError(p.config, e.info, "'repr' is not available for --newruntime")
var a: TLoc
initLocExpr(p, e[1], a)
var t = skipTypes(e[1].typ, abstractVarRange)
case t.kind
of tyInt..tyInt64, tyUInt..tyUInt64:
putIntoDest(p, d, e,
ropecg(p.module, "#reprInt((NI64)$1)", [rdLoc(a)]), a.storage)
of tyFloat..tyFloat128:
putIntoDest(p, d, e, ropecg(p.module, "#reprFloat($1)", [rdLoc(a)]), a.storage)
of tyBool:
putIntoDest(p, d, e, ropecg(p.module, "#reprBool($1)", [rdLoc(a)]), a.storage)
of tyChar:
putIntoDest(p, d, e, ropecg(p.module, "#reprChar($1)", [rdLoc(a)]), a.storage)
of tyEnum, tyOrdinal:
putIntoDest(p, d, e,
ropecg(p.module, "#reprEnum((NI)$1, $2)", [
rdLoc(a), genTypeInfo(p.module, t, e.info)]), a.storage)
of tyString:
putIntoDest(p, d, e, ropecg(p.module, "#reprStr($1)", [rdLoc(a)]), a.storage)
of tySet:
putIntoDest(p, d, e, ropecg(p.module, "#reprSet($1, $2)", [
addrLoc(p.config, a), genTypeInfo(p.module, t, e.info)]), a.storage)
of tyOpenArray, tyVarargs:
var b: TLoc
case skipTypes(a.t, abstractVarRange).kind
of tyOpenArray, tyVarargs:
putIntoDest(p, b, e, "$1, $1Len_0" % [rdLoc(a)], a.storage)
of tyString, tySequence:
putIntoDest(p, b, e,
"$1$3, $2" % [rdLoc(a), lenExpr(p, a), dataField(p)], a.storage)
of tyArray:
putIntoDest(p, b, e,
"$1, $2" % [rdLoc(a), rope(lengthOrd(p.config, a.t))], a.storage)
else: internalError(p.config, e[0].info, "genRepr()")
putIntoDest(p, d, e,
ropecg(p.module, "#reprOpenArray($1, $2)", [rdLoc(b),
genTypeInfo(p.module, elemType(t), e.info)]), a.storage)
of tyCString, tyArray, tyRef, tyPtr, tyPointer, tyNil, tySequence:
putIntoDest(p, d, e,
ropecg(p.module, "#reprAny($1, $2)", [
rdLoc(a), genTypeInfo(p.module, t, e.info)]), a.storage)
of tyEmpty, tyVoid:
localError(p.config, e.info, "'repr' doesn't support 'void' type")
else:
putIntoDest(p, d, e, ropecg(p.module, "#reprAny($1, $2)",
[addrLoc(p.config, a), genTypeInfo(p.module, t, e.info)]),
a.storage)
gcUsage(p.config, e)
proc rdMType(p: BProc; a: TLoc; nilCheck: var Rope): Rope =
result = rdLoc(a)
var t = skipTypes(a.t, abstractInst)
while t.kind in {tyVar, tyLent, tyPtr, tyRef}:
if t.kind notin {tyVar, tyLent}: nilCheck = result
if t.kind notin {tyVar, tyLent} or not p.module.compileToCpp:
result = "(*$1)" % [result]
t = skipTypes(t.lastSon, abstractInst)
discard getTypeDesc(p.module, t)
if not p.module.compileToCpp:
while t.kind == tyObject and t[0] != nil:
result.add(".Sup")
t = skipTypes(t[0], skipPtrs)
result.add ".m_type"
proc genGetTypeInfo(p: BProc, e: PNode, d: var TLoc) =
discard cgsym(p.module, "TNimType")
let t = e[1].typ
if isFinal(t) or e[0].sym.name.s != "getDynamicTypeInfo":
# ordinary static type information
putIntoDest(p, d, e, genTypeInfo(p.module, t, e.info))
else:
var a: TLoc
initLocExpr(p, e[1], a)
var nilCheck = Rope(nil)
# use the dynamic type stored at offset 0:
putIntoDest(p, d, e, rdMType(p, a, nilCheck))
template genDollar(p: BProc, n: PNode, d: var TLoc, frmt: string) =
var a: TLoc
initLocExpr(p, n[1], a)
a.r = ropecg(p.module, frmt, [rdLoc(a)])
a.flags = a.flags - {lfIndirect} # this flag should not be propagated here (not just for HCR)
if d.k == locNone: getTemp(p, n.typ, d)
genAssignment(p, d, a, {})
gcUsage(p.config, n)
proc genArrayLen(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
var a = e[1]
if a.kind == nkHiddenAddr: a = a[0]
var typ = skipTypes(a.typ, abstractVar + tyUserTypeClasses)
case typ.kind
of tyOpenArray, tyVarargs:
# Bug #9279, len(toOpenArray()) has to work:
if a.kind in nkCallKinds and a[0].kind == nkSym and a[0].sym.magic == mSlice:
# magic: pass slice to openArray:
var b, c: TLoc
initLocExpr(p, a[2], b)
initLocExpr(p, a[3], c)
if op == mHigh:
putIntoDest(p, d, e, ropecg(p.module, "($2)-($1)", [rdLoc(b), rdLoc(c)]))
else:
putIntoDest(p, d, e, ropecg(p.module, "($2)-($1)+1", [rdLoc(b), rdLoc(c)]))
else:
if op == mHigh: unaryExpr(p, e, d, "($1Len_0-1)")
else: unaryExpr(p, e, d, "$1Len_0")
of tyCString:
if op == mHigh: unaryExpr(p, e, d, "($1 ? (#nimCStrLen($1)-1) : -1)")
else: unaryExpr(p, e, d, "($1 ? #nimCStrLen($1) : 0)")
of tyString:
var a: TLoc
initLocExpr(p, e[1], a)
var x = lenExpr(p, a)
if op == mHigh: x = "($1-1)" % [x]
putIntoDest(p, d, e, x)
of tySequence:
# we go through a temporary here because people write bullshit code.
var a, tmp: TLoc
initLocExpr(p, e[1], a)
getIntTemp(p, tmp)
var x = lenExpr(p, a)
if op == mHigh: x = "($1-1)" % [x]
lineCg(p, cpsStmts, "$1 = $2;$n", [tmp.r, x])
putIntoDest(p, d, e, tmp.r)
of tyArray:
# YYY: length(sideeffect) is optimized away incorrectly?
if op == mHigh: putIntoDest(p, d, e, rope(lastOrd(p.config, typ)))
else: putIntoDest(p, d, e, rope(lengthOrd(p.config, typ)))
else: internalError(p.config, e.info, "genArrayLen()")
proc makePtrType(baseType: PType): PType =
result = newType(tyPtr, baseType.owner)
addSonSkipIntLit(result, baseType)
proc makeAddr(n: PNode): PNode =
if n.kind == nkHiddenAddr:
result = n
else:
result = newTree(nkHiddenAddr, n)
result.typ = makePtrType(n.typ)
proc genSetLengthSeq(p: BProc, e: PNode, d: var TLoc) =
if optSeqDestructors in p.config.globalOptions:
e[1] = makeAddr(e[1])
genCall(p, e, d)
return
var a, b, call: TLoc
assert(d.k == locNone)
var x = e[1]
if x.kind in {nkAddr, nkHiddenAddr}: x = x[0]
initLocExpr(p, x, a)
initLocExpr(p, e[2], b)
let t = skipTypes(e[1].typ, {tyVar})
initLoc(call, locCall, e, OnHeap)
if not p.module.compileToCpp:
const setLenPattern = "($3) #setLengthSeqV2(&($1)->Sup, $4, $2)"
call.r = ropecg(p.module, setLenPattern, [
rdLoc(a), rdLoc(b), getTypeDesc(p.module, t),
genTypeInfo(p.module, t.skipTypes(abstractInst), e.info)])
else:
const setLenPattern = "($3) #setLengthSeqV2($1, $4, $2)"
call.r = ropecg(p.module, setLenPattern, [
rdLoc(a), rdLoc(b), getTypeDesc(p.module, t),
genTypeInfo(p.module, t.skipTypes(abstractInst), e.info)])
genAssignment(p, a, call, {})
gcUsage(p.config, e)
proc genSetLengthStr(p: BProc, e: PNode, d: var TLoc) =
if optSeqDestructors in p.config.globalOptions:
binaryStmtAddr(p, e, d, "setLengthStrV2")
else:
var a, b, call: TLoc
if d.k != locNone: internalError(p.config, e.info, "genSetLengthStr")
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
initLoc(call, locCall, e, OnHeap)
call.r = ropecg(p.module, "#setLengthStr($1, $2)", [
rdLoc(a), rdLoc(b)])
genAssignment(p, a, call, {})
gcUsage(p.config, e)
proc genSwap(p: BProc, e: PNode, d: var TLoc) =
# swap(a, b) -->
# temp = a
# a = b
# b = temp
var a, b, tmp: TLoc
getTemp(p, skipTypes(e[1].typ, abstractVar), tmp)
initLocExpr(p, e[1], a) # eval a
initLocExpr(p, e[2], b) # eval b
genAssignment(p, tmp, a, {})
genAssignment(p, a, b, {})
genAssignment(p, b, tmp, {})
proc rdSetElemLoc(conf: ConfigRef; a: TLoc, typ: PType): Rope =
# read a location of an set element; it may need a subtraction operation
# before the set operation
result = rdCharLoc(a)
let setType = typ.skipTypes(abstractPtrs)
assert(setType.kind == tySet)
if firstOrd(conf, setType) != 0:
result = "($1- $2)" % [result, rope(firstOrd(conf, setType))]
proc fewCmps(conf: ConfigRef; s: PNode): bool =
# this function estimates whether it is better to emit code
# for constructing the set or generating a bunch of comparisons directly
if s.kind != nkCurly: return false
if (getSize(conf, s.typ) <= conf.target.intSize) and (nfAllConst in s.flags):
result = false # it is better to emit the set generation code
elif elemType(s.typ).kind in {tyInt, tyInt16..tyInt64}:
result = true # better not emit the set if int is basetype!
else:
result = s.len <= 8 # 8 seems to be a good value
template binaryExprIn(p: BProc, e: PNode, a, b, d: var TLoc, frmt: string) =
putIntoDest(p, d, e, frmt % [rdLoc(a), rdSetElemLoc(p.config, b, a.t)])
proc genInExprAux(p: BProc, e: PNode, a, b, d: var TLoc) =
case int(getSize(p.config, skipTypes(e[1].typ, abstractVar)))
of 1: binaryExprIn(p, e, a, b, d, "(($1 &(1U<<((NU)($2)&7U)))!=0)")
of 2: binaryExprIn(p, e, a, b, d, "(($1 &(1U<<((NU)($2)&15U)))!=0)")
of 4: binaryExprIn(p, e, a, b, d, "(($1 &(1U<<((NU)($2)&31U)))!=0)")
of 8: binaryExprIn(p, e, a, b, d, "(($1 &((NU64)1<<((NU)($2)&63U)))!=0)")
else: binaryExprIn(p, e, a, b, d, "(($1[(NU)($2)>>3] &(1U<<((NU)($2)&7U)))!=0)")
template binaryStmtInExcl(p: BProc, e: PNode, d: var TLoc, frmt: string) =
var a, b: TLoc
assert(d.k == locNone)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
lineF(p, cpsStmts, frmt, [rdLoc(a), rdSetElemLoc(p.config, b, a.t)])
proc genInOp(p: BProc, e: PNode, d: var TLoc) =
var a, b, x, y: TLoc
if (e[1].kind == nkCurly) and fewCmps(p.config, e[1]):
# a set constructor but not a constant set:
# do not emit the set, but generate a bunch of comparisons; and if we do
# so, we skip the unnecessary range check: This is a semantical extension
# that code now relies on. :-/ XXX
let ea = if e[2].kind in {nkChckRange, nkChckRange64}:
e[2][0]
else:
e[2]
initLocExpr(p, ea, a)
initLoc(b, locExpr, e, OnUnknown)
if e[1].len > 0:
b.r = rope("(")
for i in 0..<e[1].len:
let it = e[1][i]
if it.kind == nkRange:
initLocExpr(p, it[0], x)
initLocExpr(p, it[1], y)
b.r.addf("$1 >= $2 && $1 <= $3",
[rdCharLoc(a), rdCharLoc(x), rdCharLoc(y)])
else:
initLocExpr(p, it, x)
b.r.addf("$1 == $2", [rdCharLoc(a), rdCharLoc(x)])
if i < e[1].len - 1: b.r.add(" || ")
b.r.add(")")
else:
# handle the case of an empty set
b.r = rope("0")
putIntoDest(p, d, e, b.r)
else:
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
genInExprAux(p, e, a, b, d)
proc genSetOp(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
const
lookupOpr: array[mLeSet..mMinusSet, string] = [
"for ($1 = 0; $1 < $2; $1++) { $n" &
" $3 = (($4[$1] & ~ $5[$1]) == 0);$n" &
" if (!$3) break;}$n",
"for ($1 = 0; $1 < $2; $1++) { $n" &
" $3 = (($4[$1] & ~ $5[$1]) == 0);$n" &
" if (!$3) break;}$n" &
"if ($3) $3 = (#nimCmpMem($4, $5, $2) != 0);$n",
"&",
"|",
"& ~"]
var a, b, i: TLoc
var setType = skipTypes(e[1].typ, abstractVar)
var size = int(getSize(p.config, setType))
case size
of 1, 2, 4, 8:
case op
of mIncl:
case size
of 1: binaryStmtInExcl(p, e, d, "$1 |= ((NU8)1)<<(($2) & 7);$n")
of 2: binaryStmtInExcl(p, e, d, "$1 |= ((NU16)1)<<(($2) & 15);$n")
of 4: binaryStmtInExcl(p, e, d, "$1 |= ((NU32)1)<<(($2) & 31);$n")
of 8: binaryStmtInExcl(p, e, d, "$1 |= ((NU64)1)<<(($2) & 63);$n")
else: assert(false, $size)
of mExcl:
case size
of 1: binaryStmtInExcl(p, e, d, "$1 &= ~(((NU8)1) << (($2) & 7));$n")
of 2: binaryStmtInExcl(p, e, d, "$1 &= ~(((NU16)1) << (($2) & 15));$n")
of 4: binaryStmtInExcl(p, e, d, "$1 &= ~(((NU32)1) << (($2) & 31));$n")
of 8: binaryStmtInExcl(p, e, d, "$1 &= ~(((NU64)1) << (($2) & 63));$n")
else: assert(false, $size)
of mCard:
if size <= 4: unaryExprChar(p, e, d, "#countBits32($1)")
else: unaryExprChar(p, e, d, "#countBits64($1)")
of mLtSet: binaryExprChar(p, e, d, "((($1 & ~ $2)==0)&&($1 != $2))")
of mLeSet: binaryExprChar(p, e, d, "(($1 & ~ $2)==0)")
of mEqSet: binaryExpr(p, e, d, "($1 == $2)")
of mMulSet: binaryExpr(p, e, d, "($1 & $2)")
of mPlusSet: binaryExpr(p, e, d, "($1 | $2)")
of mMinusSet: binaryExpr(p, e, d, "($1 & ~ $2)")
of mInSet:
genInOp(p, e, d)
else: internalError(p.config, e.info, "genSetOp()")
else:
case op
of mIncl: binaryStmtInExcl(p, e, d, "$1[(NU)($2)>>3] |=(1U<<($2&7U));$n")
of mExcl: binaryStmtInExcl(p, e, d, "$1[(NU)($2)>>3] &= ~(1U<<($2&7U));$n")
of mCard:
var a: TLoc
initLocExpr(p, e[1], a)
putIntoDest(p, d, e, ropecg(p.module, "#cardSet($1, $2)", [rdCharLoc(a), size]))
of mLtSet, mLeSet:
getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyInt), i) # our counter
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
if d.k == locNone: getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyBool), d)
if op == mLtSet:
linefmt(p, cpsStmts, lookupOpr[mLtSet],
[rdLoc(i), size, rdLoc(d), rdLoc(a), rdLoc(b)])
else:
linefmt(p, cpsStmts, lookupOpr[mLeSet],
[rdLoc(i), size, rdLoc(d), rdLoc(a), rdLoc(b)])
of mEqSet:
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
putIntoDest(p, d, e, ropecg(p.module, "(#nimCmpMem($1, $2, $3)==0)", [a.rdCharLoc, b.rdCharLoc, size]))
of mMulSet, mPlusSet, mMinusSet:
# we inline the simple for loop for better code generation:
getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyInt), i) # our counter
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
if d.k == locNone: getTemp(p, setType, d)
lineF(p, cpsStmts,
"for ($1 = 0; $1 < $2; $1++) $n" &
" $3[$1] = $4[$1] $6 $5[$1];$n", [
rdLoc(i), rope(size), rdLoc(d), rdLoc(a), rdLoc(b),
rope(lookupOpr[op])])
of mInSet: genInOp(p, e, d)
else: internalError(p.config, e.info, "genSetOp")
proc genOrd(p: BProc, e: PNode, d: var TLoc) =
unaryExprChar(p, e, d, "$1")
proc genSomeCast(p: BProc, e: PNode, d: var TLoc) =
const
ValueTypes = {tyTuple, tyObject, tyArray, tyOpenArray, tyVarargs, tyUncheckedArray}
# we use whatever C gives us. Except if we have a value-type, we need to go
# through its address:
var a: TLoc
initLocExpr(p, e[1], a)
let etyp = skipTypes(e.typ, abstractRange+{tyOwned})
let srcTyp = skipTypes(e[1].typ, abstractRange)
if etyp.kind in ValueTypes and lfIndirect notin a.flags:
putIntoDest(p, d, e, "(*($1*) ($2))" %
[getTypeDesc(p.module, e.typ), addrLoc(p.config, a)], a.storage)
elif etyp.kind == tyProc and etyp.callConv == ccClosure and srcTyp.callConv != ccClosure:
putIntoDest(p, d, e, "(($1) ($2))" %
[getClosureType(p.module, etyp, clHalfWithEnv), rdCharLoc(a)], a.storage)
else:
# C++ does not like direct casts from pointer to shorter integral types
if srcTyp.kind in {tyPtr, tyPointer} and etyp.kind in IntegralTypes:
putIntoDest(p, d, e, "(($1) (ptrdiff_t) ($2))" %
[getTypeDesc(p.module, e.typ), rdCharLoc(a)], a.storage)
elif optSeqDestructors in p.config.globalOptions and etyp.kind in {tySequence, tyString}:
putIntoDest(p, d, e, "(*($1*) (&$2))" %
[getTypeDesc(p.module, e.typ), rdCharLoc(a)], a.storage)
elif etyp.kind == tyBool and srcTyp.kind in IntegralTypes:
putIntoDest(p, d, e, "(($1) != 0)" % [rdCharLoc(a)], a.storage)
else:
putIntoDest(p, d, e, "(($1) ($2))" %
[getTypeDesc(p.module, e.typ), rdCharLoc(a)], a.storage)
proc genCast(p: BProc, e: PNode, d: var TLoc) =
const ValueTypes = {tyFloat..tyFloat128, tyTuple, tyObject, tyArray}
let
destt = skipTypes(e.typ, abstractRange)
srct = skipTypes(e[1].typ, abstractRange)
if destt.kind in ValueTypes or srct.kind in ValueTypes:
# 'cast' and some float type involved? --> use a union.
inc(p.labels)
var lbl = p.labels.rope
var tmp: TLoc
tmp.r = "LOC$1.source" % [lbl]
linefmt(p, cpsLocals, "union { $1 source; $2 dest; } LOC$3;$n",
[getTypeDesc(p.module, e[1].typ), getTypeDesc(p.module, e.typ), lbl])
tmp.k = locExpr
tmp.lode = lodeTyp srct
tmp.storage = OnStack
tmp.flags = {}
expr(p, e[1], tmp)
putIntoDest(p, d, e, "LOC$#.dest" % [lbl], tmp.storage)
else:
# I prefer the shorter cast version for pointer types -> generate less
# C code; plus it's the right thing to do for closures:
genSomeCast(p, e, d)
proc genRangeChck(p: BProc, n: PNode, d: var TLoc) =
var a: TLoc
var dest = skipTypes(n.typ, abstractVar)
initLocExpr(p, n[0], a)
if optRangeCheck notin p.options or (dest.kind in {tyUInt..tyUInt64} and
checkUnsignedConversions notin p.config.legacyFeatures):
discard "no need to generate a check because it was disabled"
else:
let raiser =
case skipTypes(n.typ, abstractVarRange).kind
of tyUInt..tyUInt64, tyChar: "raiseRangeErrorU"
of tyFloat..tyFloat128: "raiseRangeErrorF"
else: "raiseRangeErrorI"
discard cgsym(p.module, raiser)
# This seems to be bug-compatible with Nim version 1 but what we
# should really do here is to check if uint64Value < high(int)
let n0t = n[0].typ
let boundaryCast =
if n0t.skipTypes(abstractVarRange).kind in {tyUInt, tyUInt32, tyUInt64} or
(n0t.sym != nil and sfSystemModule in n0t.sym.owner.flags and n0t.sym.name.s == "csize"):
"(NI64)"
else:
""
# emit range check:
linefmt(p, cpsStmts, "if ($6($1) < $2 || $6($1) > $3){ $4($1, $2, $3); $5}$n",
[rdCharLoc(a), genLiteral(p, n[1], dest), genLiteral(p, n[2], dest),
raiser, raiseInstr(p), boundaryCast])
putIntoDest(p, d, n, "(($1) ($2))" %
[getTypeDesc(p.module, dest), rdCharLoc(a)], a.storage)
proc genConv(p: BProc, e: PNode, d: var TLoc) =
let destType = e.typ.skipTypes({tyVar, tyLent, tyGenericInst, tyAlias, tySink})
if sameBackendType(destType, e[1].typ):
expr(p, e[1], d)
else:
genSomeCast(p, e, d)
proc convStrToCStr(p: BProc, n: PNode, d: var TLoc) =
var a: TLoc
initLocExpr(p, n[0], a)
putIntoDest(p, d, n,
ropecg(p.module, "#nimToCStringConv($1)", [rdLoc(a)]),
# "($1 ? $1->data : (NCSTRING)\"\")" % [a.rdLoc],
a.storage)
proc convCStrToStr(p: BProc, n: PNode, d: var TLoc) =
var a: TLoc
initLocExpr(p, n[0], a)
putIntoDest(p, d, n,
ropecg(p.module, "#cstrToNimstr($1)", [rdLoc(a)]),
a.storage)
gcUsage(p.config, n)
proc genStrEquals(p: BProc, e: PNode, d: var TLoc) =
var x: TLoc
var a = e[1]
var b = e[2]
if a.kind in {nkStrLit..nkTripleStrLit} and a.strVal == "":
initLocExpr(p, e[2], x)
putIntoDest(p, d, e,
ropecg(p.module, "($1 == 0)", [lenExpr(p, x)]))
elif b.kind in {nkStrLit..nkTripleStrLit} and b.strVal == "":
initLocExpr(p, e[1], x)
putIntoDest(p, d, e,
ropecg(p.module, "($1 == 0)", [lenExpr(p, x)]))
else:
binaryExpr(p, e, d, "#eqStrings($1, $2)")
proc binaryFloatArith(p: BProc, e: PNode, d: var TLoc, m: TMagic) =
if {optNaNCheck, optInfCheck} * p.options != {}:
const opr: array[mAddF64..mDivF64, string] = ["+", "-", "*", "/"]
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
putIntoDest(p, d, e, ropecg(p.module, "(($4)($2) $1 ($4)($3))",
[opr[m], rdLoc(a), rdLoc(b),
getSimpleTypeDesc(p.module, e[1].typ)]))
if optNaNCheck in p.options:
linefmt(p, cpsStmts, "if ($1 != $1){ #raiseFloatInvalidOp(); $2}$n", [rdLoc(d), raiseInstr(p)])
if optInfCheck in p.options:
linefmt(p, cpsStmts, "if ($1 != 0.0 && $1*0.5 == $1) { #raiseFloatOverflow($1); $2}$n", [rdLoc(d), raiseInstr(p)])
else:
binaryArith(p, e, d, m)
proc skipAddr(n: PNode): PNode =
result = if n.kind in {nkAddr, nkHiddenAddr}: n[0] else: n
proc genWasMoved(p: BProc; n: PNode) =
var a: TLoc
let n1 = n[1].skipAddr
if p.withinBlockLeaveActions > 0 and notYetAlive(n1):
discard
else:
initLocExpr(p, n1, a)
resetLoc(p, a)
#linefmt(p, cpsStmts, "#nimZeroMem((void*)$1, sizeof($2));$n",
# [addrLoc(p.config, a), getTypeDesc(p.module, a.t)])
proc genMove(p: BProc; n: PNode; d: var TLoc) =
var a: TLoc
initLocExpr(p, n[1].skipAddr, a)
if n.len == 4:
# generated by liftdestructors:
var src: TLoc
initLocExpr(p, n[2], src)
linefmt(p, cpsStmts, "if ($1.len && $1.p != $2.p) {", [rdLoc(a), rdLoc(src)])
genStmts(p, n[3])
linefmt(p, cpsStmts, "}$n$1.len = $2.len; $1.p = $2.p;$n", [rdLoc(a), rdLoc(src)])
else:
if d.k == locNone: getTemp(p, n.typ, d)
genAssignment(p, d, a, {})
resetLoc(p, a)
proc genDestroy(p: BProc; n: PNode) =
if optSeqDestructors in p.config.globalOptions:
let arg = n[1].skipAddr
let t = arg.typ.skipTypes(abstractInst)
case t.kind
of tyString:
var a: TLoc
initLocExpr(p, arg, a)
linefmt(p, cpsStmts, "if ($1.p && !($1.p->cap & NIM_STRLIT_FLAG)) {$n" &
" #deallocShared($1.p);$n" &
" $1.p = NIM_NIL; $1.len = 0; }$n",
[rdLoc(a)])
of tySequence:
var a: TLoc
initLocExpr(p, arg, a)
linefmt(p, cpsStmts, "if ($1.p && !($1.p->cap & NIM_STRLIT_FLAG)) {$n" &
" #deallocShared($1.p);$n" &
" $1.p = NIM_NIL; $1.len = 0; }$n",
[rdLoc(a), getTypeDesc(p.module, t.lastSon)])
else: discard "nothing to do"
else:
let t = n[1].typ.skipTypes(abstractVar)
if t.destructor != nil and t.destructor.ast[bodyPos].len != 0:
internalError(p.config, n.info, "destructor turned out to be not trivial")
discard "ignore calls to the default destructor"
proc genDispose(p: BProc; n: PNode) =
when false:
let elemType = n[1].typ.skipTypes(abstractVar).lastSon
var a: TLoc
initLocExpr(p, n[1].skipAddr, a)
if isFinal(elemType):
if elemType.destructor != nil:
var destroyCall = newNodeI(nkCall, n.info)
genStmts(p, destroyCall)
lineCg(p, cpsStmts, ["#nimRawDispose($#)", rdLoc(a)])
else:
# ``nimRawDisposeVirtual`` calls the ``finalizer`` which is the same as the
# destructor, but it uses the runtime type. Afterwards the memory is freed:
lineCg(p, cpsStmts, ["#nimDestroyAndDispose($#)", rdLoc(a)])
proc genEnumToStr(p: BProc, e: PNode, d: var TLoc) =
const ToStringProcSlot = -4
let t = e[1].typ.skipTypes(abstractInst+{tyRange})
var toStrProc: PSym = nil
for idx, p in items(t.methods):
if idx == ToStringProcSlot:
toStrProc = p
break
if toStrProc == nil:
toStrProc = genEnumToStrProc(t, e.info, p.module.g.graph)
t.methods.add((ToStringProcSlot, toStrProc))
var n = copyTree(e)
n[0] = newSymNode(toStrProc)
expr(p, n, d)
proc genMagicExpr(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
case op
of mOr, mAnd: genAndOr(p, e, d, op)
of mNot..mUnaryMinusF64: unaryArith(p, e, d, op)
of mUnaryMinusI..mAbsI: unaryArithOverflow(p, e, d, op)
of mAddF64..mDivF64: binaryFloatArith(p, e, d, op)
of mShrI..mXor: binaryArith(p, e, d, op)
of mEqProc: genEqProc(p, e, d)
of mAddI..mPred: binaryArithOverflow(p, e, d, op)
of mRepr: genRepr(p, e, d)
of mGetTypeInfo: genGetTypeInfo(p, e, d)
of mSwap: genSwap(p, e, d)
of mInc, mDec:
const opr: array[mInc..mDec, string] = ["+=", "-="]
const fun64: array[mInc..mDec, string] = ["nimAddInt64", "nimSubInt64"]
const fun: array[mInc..mDec, string] = ["nimAddInt","nimSubInt"]
let underlying = skipTypes(e[1].typ, {tyGenericInst, tyAlias, tySink, tyVar, tyLent, tyRange, tyDistinct})
if optOverflowCheck notin p.options or underlying.kind in {tyUInt..tyUInt64}:
binaryStmt(p, e, d, opr[op])
else:
var a, b: TLoc
assert(e[1].typ != nil)
assert(e[2].typ != nil)
initLocExpr(p, e[1], a)
initLocExpr(p, e[2], b)
let ranged = skipTypes(e[1].typ, {tyGenericInst, tyAlias, tySink, tyVar, tyLent})
let res = binaryArithOverflowRaw(p, ranged, a, b,
if underlying.kind == tyInt64: fun64[op] else: fun[op])
putIntoDest(p, a, e[1], "($#)($#)" % [
getTypeDesc(p.module, ranged), res])
of mConStrStr: genStrConcat(p, e, d)
of mAppendStrCh:
if optSeqDestructors in p.config.globalOptions:
binaryStmtAddr(p, e, d, "nimAddCharV1")
else:
var dest, b, call: TLoc
initLoc(call, locCall, e, OnHeap)
initLocExpr(p, e[1], dest)
initLocExpr(p, e[2], b)
call.r = ropecg(p.module, "#addChar($1, $2)", [rdLoc(dest), rdLoc(b)])
genAssignment(p, dest, call, {})
of mAppendStrStr: genStrAppend(p, e, d)
of mAppendSeqElem:
if optSeqDestructors in p.config.globalOptions:
e[1] = makeAddr(e[1])
genCall(p, e, d)
else:
genSeqElemAppend(p, e, d)
of mEqStr: genStrEquals(p, e, d)
of mLeStr: binaryExpr(p, e, d, "(#cmpStrings($1, $2) <= 0)")
of mLtStr: binaryExpr(p, e, d, "(#cmpStrings($1, $2) < 0)")
of mIsNil: genIsNil(p, e, d)
of mIntToStr: genDollar(p, e, d, "#nimIntToStr($1)")
of mInt64ToStr: genDollar(p, e, d, "#nimInt64ToStr($1)")
of mBoolToStr: genDollar(p, e, d, "#nimBoolToStr($1)")
of mCharToStr: genDollar(p, e, d, "#nimCharToStr($1)")
of mFloatToStr: genDollar(p, e, d, "#nimFloatToStr($1)")
of mCStrToStr: genDollar(p, e, d, "#cstrToNimstr($1)")
of mStrToStr, mUnown: expr(p, e[1], d)
of mEnumToStr:
if optTinyRtti in p.config.globalOptions:
genEnumToStr(p, e, d)
else:
genRepr(p, e, d)
of mOf: genOf(p, e, d)
of mNew: genNew(p, e)
of mNewFinalize:
if optTinyRtti in p.config.globalOptions:
var a: TLoc
initLocExpr(p, e[1], a)
rawGenNew(p, a, nil, needsInit = true)
gcUsage(p.config, e)
else:
genNewFinalize(p, e)
of mNewSeq: genNewSeq(p, e)
of mNewSeqOfCap: genNewSeqOfCap(p, e, d)
of mSizeOf:
let t = e[1].typ.skipTypes({tyTypeDesc})
putIntoDest(p, d, e, "((NI)sizeof($1))" % [getTypeDesc(p.module, t)])
of mAlignOf:
let t = e[1].typ.skipTypes({tyTypeDesc})
putIntoDest(p, d, e, "((NI)NIM_ALIGNOF($1))" % [getTypeDesc(p.module, t)])
of mOffsetOf:
var dotExpr: PNode
block findDotExpr:
if e[1].kind == nkDotExpr:
dotExpr = e[1]
elif e[1].kind == nkCheckedFieldExpr:
dotExpr = e[1][0]
else:
internalError(p.config, e.info, "unknown ast")
let t = dotExpr[0].typ.skipTypes({tyTypeDesc})
let tname = getTypeDesc(p.module, t)
let member =
if t.kind == tyTuple:
"Field" & rope(dotExpr[1].sym.position)
else: dotExpr[1].sym.loc.r
putIntoDest(p,d,e, "((NI)offsetof($1, $2))" % [tname, member])
of mChr: genSomeCast(p, e, d)
of mOrd: genOrd(p, e, d)
of mLengthArray, mHigh, mLengthStr, mLengthSeq, mLengthOpenArray:
genArrayLen(p, e, d, op)
of mGCref: unaryStmt(p, e, d, "if ($1) { #nimGCref($1); }$n")
of mGCunref: unaryStmt(p, e, d, "if ($1) { #nimGCunref($1); }$n")
of mSetLengthStr: genSetLengthStr(p, e, d)
of mSetLengthSeq: genSetLengthSeq(p, e, d)
of mIncl, mExcl, mCard, mLtSet, mLeSet, mEqSet, mMulSet, mPlusSet, mMinusSet,
mInSet:
genSetOp(p, e, d, op)
of mNewString, mNewStringOfCap, mExit, mParseBiggestFloat:
var opr = e[0].sym
# Why would anyone want to set nodecl to one of these hardcoded magics?
# - not sure, and it wouldn't work if the symbol behind the magic isn't
# somehow forward-declared from some other usage, but it is *possible*
if lfNoDecl notin opr.loc.flags:
let prc = magicsys.getCompilerProc(p.module.g.graph, $opr.loc.r)
# HACK:
# Explicitly add this proc as declared here so the cgsym call doesn't
# add a forward declaration - without this we could end up with the same
# 2 forward declarations. That happens because the magic symbol and the original
# one that shall be used have different ids (even though a call to one is
# actually a call to the other) so checking into m.declaredProtos with the 2 different ids doesn't work.
# Why would 2 identical forward declarations be a problem?
# - in the case of hot code-reloading we generate function pointers instead
# of forward declarations and in C++ it is an error to redefine a global
let wasDeclared = containsOrIncl(p.module.declaredProtos, prc.id)
# Make the function behind the magic get actually generated - this will
# not lead to a forward declaration! The genCall will lead to one.
discard cgsym(p.module, $opr.loc.r)
# make sure we have pointer-initialising code for hot code reloading
if not wasDeclared and p.hcrOn:
p.module.s[cfsDynLibInit].addf("\t$1 = ($2) hcrGetProc($3, \"$1\");$n",
[mangleDynLibProc(prc), getTypeDesc(p.module, prc.loc.t), getModuleDllPath(p.module, prc)])
genCall(p, e, d)
of mDefault: genDefault(p, e, d)
of mReset: genReset(p, e)
of mEcho: genEcho(p, e[1].skipConv)
of mArrToSeq: genArrToSeq(p, e, d)
of mNLen..mNError, mSlurp..mQuoteAst:
localError(p.config, e.info, strutils.`%`(errXMustBeCompileTime, e[0].sym.name.s))
of mSpawn:
when defined(leanCompiler):
quit "compiler built without support for the 'spawn' statement"
else:
let n = spawn.wrapProcForSpawn(p.module.g.graph, p.module.module, e, e.typ, nil, nil)
expr(p, n, d)
of mParallel:
when defined(leanCompiler):
quit "compiler built without support for the 'parallel' statement"
else:
let n = semparallel.liftParallel(p.module.g.graph, p.module.module, e)
expr(p, n, d)
of mDeepCopy:
var a, b: TLoc
let x = if e[1].kind in {nkAddr, nkHiddenAddr}: e[1][0] else: e[1]
initLocExpr(p, x, a)
initLocExpr(p, e[2], b)
genDeepCopy(p, a, b)
of mDotDot, mEqCString: genCall(p, e, d)
of mWasMoved: genWasMoved(p, e)
of mMove: genMove(p, e, d)
of mDestroy: genDestroy(p, e)
of mAccessEnv: unaryExpr(p, e, d, "$1.ClE_0")
of mSlice:
localError(p.config, e.info, "invalid context for 'toOpenArray'; " &
"'toOpenArray' is only valid within a call expression")
else:
when defined(debugMagics):
echo p.prc.name.s, " ", p.prc.id, " ", p.prc.flags, " ", p.prc.ast[genericParamsPos].kind
internalError(p.config, e.info, "genMagicExpr: " & $op)
proc genSetConstr(p: BProc, e: PNode, d: var TLoc) =
# example: { a..b, c, d, e, f..g }
# we have to emit an expression of the form:
# nimZeroMem(tmp, sizeof(tmp)); inclRange(tmp, a, b); incl(tmp, c);
# incl(tmp, d); incl(tmp, e); inclRange(tmp, f, g);
var
a, b, idx: TLoc
if nfAllConst in e.flags:
putIntoDest(p, d, e, genSetNode(p, e))
else:
if d.k == locNone: getTemp(p, e.typ, d)
if getSize(p.config, e.typ) > 8:
# big set:
linefmt(p, cpsStmts, "#nimZeroMem($1, sizeof($2));$n",
[rdLoc(d), getTypeDesc(p.module, e.typ)])
for it in e.sons:
if it.kind == nkRange:
getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyInt), idx) # our counter
initLocExpr(p, it[0], a)
initLocExpr(p, it[1], b)
lineF(p, cpsStmts, "for ($1 = $3; $1 <= $4; $1++) $n" &
"$2[(NU)($1)>>3] |=(1U<<((NU)($1)&7U));$n", [rdLoc(idx), rdLoc(d),
rdSetElemLoc(p.config, a, e.typ), rdSetElemLoc(p.config, b, e.typ)])
else:
initLocExpr(p, it, a)
lineF(p, cpsStmts, "$1[(NU)($2)>>3] |=(1U<<((NU)($2)&7U));$n",
[rdLoc(d), rdSetElemLoc(p.config, a, e.typ)])
else:
# small set
var ts = "NU" & $(getSize(p.config, e.typ) * 8)
lineF(p, cpsStmts, "$1 = 0;$n", [rdLoc(d)])
for it in e.sons:
if it.kind == nkRange:
getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyInt), idx) # our counter
initLocExpr(p, it[0], a)
initLocExpr(p, it[1], b)
lineF(p, cpsStmts, "for ($1 = $3; $1 <= $4; $1++) $n" &
"$2 |=(($5)(1)<<(($1)%(sizeof($5)*8)));$n", [
rdLoc(idx), rdLoc(d), rdSetElemLoc(p.config, a, e.typ),
rdSetElemLoc(p.config, b, e.typ), rope(ts)])
else:
initLocExpr(p, it, a)
lineF(p, cpsStmts,
"$1 |=(($3)(1)<<(($2)%(sizeof($3)*8)));$n",
[rdLoc(d), rdSetElemLoc(p.config, a, e.typ), rope(ts)])
proc genTupleConstr(p: BProc, n: PNode, d: var TLoc) =
var rec: TLoc
if not handleConstExpr(p, n, d):
let t = n.typ
discard getTypeDesc(p.module, t) # so that any fields are initialized
if d.k == locNone: getTemp(p, t, d)
for i in 0..<n.len:
var it = n[i]
if it.kind == nkExprColonExpr: it = it[1]
initLoc(rec, locExpr, it, d.storage)
rec.r = "$1.Field$2" % [rdLoc(d), rope(i)]
rec.flags.incl(lfEnforceDeref)
expr(p, it, rec)
proc isConstClosure(n: PNode): bool {.inline.} =
result = n[0].kind == nkSym and isRoutine(n[0].sym) and
n[1].kind == nkNilLit
proc genClosure(p: BProc, n: PNode, d: var TLoc) =
assert n.kind in {nkPar, nkTupleConstr, nkClosure}
if isConstClosure(n):
inc(p.module.labels)
var tmp = "CNSTCLOSURE" & rope(p.module.labels)
p.module.s[cfsData].addf("static NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(p.module, n.typ), tmp, genBracedInit(p, n, isConst = true)])
putIntoDest(p, d, n, tmp, OnStatic)
else:
var tmp, a, b: TLoc
initLocExpr(p, n[0], a)
initLocExpr(p, n[1], b)
if n[0].skipConv.kind == nkClosure:
internalError(p.config, n.info, "closure to closure created")
# tasyncawait.nim breaks with this optimization:
when false:
if d.k != locNone:
linefmt(p, cpsStmts, "$1.ClP_0 = $2; $1.ClE_0 = $3;$n",
[d.rdLoc, a.rdLoc, b.rdLoc])
else:
getTemp(p, n.typ, tmp)
linefmt(p, cpsStmts, "$1.ClP_0 = $2; $1.ClE_0 = $3;$n",
[tmp.rdLoc, a.rdLoc, b.rdLoc])
putLocIntoDest(p, d, tmp)
proc genArrayConstr(p: BProc, n: PNode, d: var TLoc) =
var arr: TLoc
if not handleConstExpr(p, n, d):
if d.k == locNone: getTemp(p, n.typ, d)
for i in 0..<n.len:
initLoc(arr, locExpr, lodeTyp elemType(skipTypes(n.typ, abstractInst)), d.storage)
arr.r = "$1[$2]" % [rdLoc(d), intLiteral(i)]
expr(p, n[i], arr)
proc genComplexConst(p: BProc, sym: PSym, d: var TLoc) =
requestConstImpl(p, sym)
assert((sym.loc.r != nil) and (sym.loc.t != nil))
putLocIntoDest(p, d, sym.loc)
template genStmtListExprImpl(exprOrStmt) {.dirty.} =
#let hasNimFrame = magicsys.getCompilerProc("nimFrame") != nil
let hasNimFrame = p.prc != nil and
sfSystemModule notin p.module.module.flags and
optStackTrace in p.prc.options
var frameName: Rope = nil
for i in 0..<n.len - 1:
let it = n[i]
if it.kind == nkComesFrom:
if hasNimFrame and frameName == nil:
inc p.labels
frameName = "FR" & rope(p.labels) & "_"
let theMacro = it[0].sym
add p.s(cpsStmts), initFrameNoDebug(p, frameName,
makeCString theMacro.name.s,
quotedFilename(p.config, theMacro.info), it.info.line.int)
else:
genStmts(p, it)
if n.len > 0: exprOrStmt
if frameName != nil:
p.s(cpsStmts).add deinitFrameNoDebug(p, frameName)
proc genStmtListExpr(p: BProc, n: PNode, d: var TLoc) =
genStmtListExprImpl:
expr(p, n[^1], d)
proc genStmtList(p: BProc, n: PNode) =
genStmtListExprImpl:
genStmts(p, n[^1])
from parampatterns import isLValue
proc upConv(p: BProc, n: PNode, d: var TLoc) =
var a: TLoc
initLocExpr(p, n[0], a)
let dest = skipTypes(n.typ, abstractPtrs)
if optObjCheck in p.options and not isObjLackingTypeField(dest):
var nilCheck = Rope(nil)
let r = rdMType(p, a, nilCheck)
let checkFor = if optTinyRtti in p.config.globalOptions:
genTypeInfo2Name(p.module, dest)
else:
genTypeInfo(p.module, dest, n.info)
if nilCheck != nil:
linefmt(p, cpsStmts, "if ($1 && !#isObj($2, $3)){ #raiseObjectConversionError(); $4}$n",
[nilCheck, r, checkFor, raiseInstr(p)])
else:
linefmt(p, cpsStmts, "if (!#isObj($1, $2)){ #raiseObjectConversionError(); $3}$n",
[r, checkFor, raiseInstr(p)])
if n[0].typ.kind != tyObject:
if n.isLValue:
putIntoDest(p, d, n,
"(*(($1*) (&($2))))" % [getTypeDesc(p.module, n.typ), rdLoc(a)], a.storage)
else:
putIntoDest(p, d, n,
"(($1) ($2))" % [getTypeDesc(p.module, n.typ), rdLoc(a)], a.storage)
else:
putIntoDest(p, d, n, "(*($1*) ($2))" %
[getTypeDesc(p.module, dest), addrLoc(p.config, a)], a.storage)
proc downConv(p: BProc, n: PNode, d: var TLoc) =
if p.module.compileToCpp:
discard getTypeDesc(p.module, skipTypes(n[0].typ, abstractPtrs))
expr(p, n[0], d) # downcast does C++ for us
else:
var dest = skipTypes(n.typ, abstractPtrs)
var arg = n[0]
while arg.kind == nkObjDownConv: arg = arg[0]
var src = skipTypes(arg.typ, abstractPtrs)
discard getTypeDesc(p.module, src)
var a: TLoc
initLocExpr(p, arg, a)
var r = rdLoc(a)
let isRef = skipTypes(arg.typ, abstractInstOwned).kind in {tyRef, tyPtr, tyVar, tyLent}
if isRef:
r.add("->Sup")
else:
r.add(".Sup")
for i in 2..abs(inheritanceDiff(dest, src)): r.add(".Sup")
if isRef:
# it can happen that we end up generating '&&x->Sup' here, so we pack
# the '&x->Sup' into a temporary and then those address is taken
# (see bug #837). However sometimes using a temporary is not correct:
# init(TFigure(my)) # where it is passed to a 'var TFigure'. We test
# this by ensuring the destination is also a pointer:
if d.k == locNone and skipTypes(n.typ, abstractInstOwned).kind in {tyRef, tyPtr, tyVar, tyLent}:
getTemp(p, n.typ, d)
linefmt(p, cpsStmts, "$1 = &$2;$n", [rdLoc(d), r])
else:
r = "&" & r
putIntoDest(p, d, n, r, a.storage)
else:
putIntoDest(p, d, n, r, a.storage)
proc exprComplexConst(p: BProc, n: PNode, d: var TLoc) =
let t = n.typ
discard getTypeDesc(p.module, t) # so that any fields are initialized
let id = nodeTableTestOrSet(p.module.dataCache, n, p.module.labels)
let tmp = p.module.tmpBase & rope(id)
if id == p.module.labels:
# expression not found in the cache:
inc(p.module.labels)
p.module.s[cfsData].addf("static NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(p.module, t), tmp, genBracedInit(p, n, isConst = true)])
if d.k == locNone:
fillLoc(d, locData, n, tmp, OnStatic)
else:
putDataIntoDest(p, d, n, tmp)
# This fixes bug #4551, but we really need better dataflow
# analysis to make this 100% safe.
if t.kind notin {tySequence, tyString}:
d.storage = OnStatic
proc expr(p: BProc, n: PNode, d: var TLoc) =
p.currLineInfo = n.info
case n.kind
of nkSym:
var sym = n.sym
case sym.kind
of skMethod:
if {sfDispatcher, sfForward} * sym.flags != {}:
# we cannot produce code for the dispatcher yet:
fillProcLoc(p.module, n)
genProcPrototype(p.module, sym)
else:
genProc(p.module, sym)
putLocIntoDest(p, d, sym.loc)
of skProc, skConverter, skIterator, skFunc:
#if sym.kind == skIterator:
# echo renderTree(sym.getBody, {renderIds})
if sfCompileTime in sym.flags:
localError(p.config, n.info, "request to generate code for .compileTime proc: " &
sym.name.s)
genProc(p.module, sym)
if sym.loc.r == nil or sym.loc.lode == nil:
internalError(p.config, n.info, "expr: proc not init " & sym.name.s)
putLocIntoDest(p, d, sym.loc)
of skConst:
if isSimpleConst(sym.typ):
putIntoDest(p, d, n, genLiteral(p, sym.ast, sym.typ), OnStatic)
else:
genComplexConst(p, sym, d)
of skEnumField:
# we never reach this case - as of the time of this comment,
# skEnumField is folded to an int in semfold.nim, but this code
# remains for robustness
putIntoDest(p, d, n, rope(sym.position))
of skVar, skForVar, skResult, skLet:
if {sfGlobal, sfThread} * sym.flags != {}:
genVarPrototype(p.module, n)
if sfCompileTime in sym.flags:
genSingleVar(p, sym, n, astdef(sym))
if sym.loc.r == nil or sym.loc.t == nil:
#echo "FAILED FOR PRCO ", p.prc.name.s
#echo renderTree(p.prc.ast, {renderIds})
internalError p.config, n.info, "expr: var not init " & sym.name.s & "_" & $sym.id
if sfThread in sym.flags:
accessThreadLocalVar(p, sym)
if emulatedThreadVars(p.config):
putIntoDest(p, d, sym.loc.lode, "NimTV_->" & sym.loc.r)
else:
putLocIntoDest(p, d, sym.loc)
else:
putLocIntoDest(p, d, sym.loc)
of skTemp:
when false:
# this is more harmful than helpful.
if sym.loc.r == nil:
# we now support undeclared 'skTemp' variables for easier
# transformations in other parts of the compiler:
assignLocalVar(p, n)
if sym.loc.r == nil or sym.loc.t == nil:
#echo "FAILED FOR PRCO ", p.prc.name.s
#echo renderTree(p.prc.ast, {renderIds})
internalError(p.config, n.info, "expr: temp not init " & sym.name.s & "_" & $sym.id)
putLocIntoDest(p, d, sym.loc)
of skParam:
if sym.loc.r == nil or sym.loc.t == nil:
# echo "FAILED FOR PRCO ", p.prc.name.s
# debug p.prc.typ.n
# echo renderTree(p.prc.ast, {renderIds})
internalError(p.config, n.info, "expr: param not init " & sym.name.s & "_" & $sym.id)
putLocIntoDest(p, d, sym.loc)
else: internalError(p.config, n.info, "expr(" & $sym.kind & "); unknown symbol")
of nkNilLit:
if not isEmptyType(n.typ):
putIntoDest(p, d, n, genLiteral(p, n))
of nkStrLit..nkTripleStrLit:
putDataIntoDest(p, d, n, genLiteral(p, n))
of nkIntLit..nkUInt64Lit,
nkFloatLit..nkFloat128Lit, nkCharLit:
putIntoDest(p, d, n, genLiteral(p, n))
of nkCall, nkHiddenCallConv, nkInfix, nkPrefix, nkPostfix, nkCommand,
nkCallStrLit:
genLineDir(p, n) # may be redundant, it is generated in fixupCall as well
let op = n[0]
if n.typ.isNil:
# discard the value:
var a: TLoc
if op.kind == nkSym and op.sym.magic != mNone:
genMagicExpr(p, n, a, op.sym.magic)
else:
genCall(p, n, a)
else:
# load it into 'd':
if op.kind == nkSym and op.sym.magic != mNone:
genMagicExpr(p, n, d, op.sym.magic)
else:
genCall(p, n, d)
of nkCurly:
if isDeepConstExpr(n) and n.len != 0:
putIntoDest(p, d, n, genSetNode(p, n))
else:
genSetConstr(p, n, d)
of nkBracket:
if isDeepConstExpr(n) and n.len != 0:
exprComplexConst(p, n, d)
elif skipTypes(n.typ, abstractVarRange).kind == tySequence:
genSeqConstr(p, n, d)
else:
genArrayConstr(p, n, d)
of nkPar, nkTupleConstr:
if n.typ != nil and n.typ.kind == tyProc and n.len == 2:
genClosure(p, n, d)
elif isDeepConstExpr(n) and n.len != 0:
exprComplexConst(p, n, d)
else:
genTupleConstr(p, n, d)
of nkObjConstr: genObjConstr(p, n, d)
of nkCast: genCast(p, n, d)
of nkHiddenStdConv, nkHiddenSubConv, nkConv: genConv(p, n, d)
of nkHiddenAddr, nkAddr: genAddr(p, n, d)
of nkBracketExpr: genBracketExpr(p, n, d)
of nkDerefExpr, nkHiddenDeref: genDeref(p, n, d)
of nkDotExpr: genRecordField(p, n, d)
of nkCheckedFieldExpr: genCheckedRecordField(p, n, d)
of nkBlockExpr, nkBlockStmt: genBlock(p, n, d)
of nkStmtListExpr: genStmtListExpr(p, n, d)
of nkStmtList: genStmtList(p, n)
of nkIfExpr, nkIfStmt: genIf(p, n, d)
of nkWhen:
# This should be a "when nimvm" node.
expr(p, n[1][0], d)
of nkObjDownConv: downConv(p, n, d)
of nkObjUpConv: upConv(p, n, d)
of nkChckRangeF: genRangeChck(p, n, d)
of nkChckRange64: genRangeChck(p, n, d)
of nkChckRange: genRangeChck(p, n, d)
of nkStringToCString: convStrToCStr(p, n, d)
of nkCStringToString: convCStrToStr(p, n, d)
of nkLambdaKinds:
var sym = n[namePos].sym
genProc(p.module, sym)
if sym.loc.r == nil or sym.loc.lode == nil:
internalError(p.config, n.info, "expr: proc not init " & sym.name.s)
putLocIntoDest(p, d, sym.loc)
of nkClosure: genClosure(p, n, d)
of nkEmpty: discard
of nkWhileStmt: genWhileStmt(p, n)
of nkVarSection, nkLetSection: genVarStmt(p, n)
of nkConstSection: discard # consts generated lazily on use
of nkForStmt: internalError(p.config, n.info, "for statement not eliminated")
of nkCaseStmt: genCase(p, n, d)
of nkReturnStmt: genReturnStmt(p, n)
of nkBreakStmt: genBreakStmt(p, n)
of nkAsgn:
if nfPreventCg notin n.flags:
genAsgn(p, n, fastAsgn=false)
of nkFastAsgn:
if nfPreventCg notin n.flags:
# transf is overly aggressive with 'nkFastAsgn', so we work around here.
# See tests/run/tcnstseq3 for an example that would fail otherwise.
genAsgn(p, n, fastAsgn=p.prc != nil)
of nkDiscardStmt:
let ex = n[0]
if ex.kind != nkEmpty:
genLineDir(p, n)
var a: TLoc
initLocExprSingleUse(p, ex, a)
line(p, cpsStmts, "(void)(" & a.r & ");\L")
of nkAsmStmt: genAsmStmt(p, n)
of nkTryStmt, nkHiddenTryStmt:
case p.config.exc
of excGoto:
genTryGoto(p, n, d)
of excCpp:
genTryCpp(p, n, d)
else:
genTrySetjmp(p, n, d)
of nkRaiseStmt: genRaiseStmt(p, n)
of nkTypeSection:
# we have to emit the type information for object types here to support
# separate compilation:
genTypeSection(p.module, n)
of nkCommentStmt, nkIteratorDef, nkIncludeStmt,
nkImportStmt, nkImportExceptStmt, nkExportStmt, nkExportExceptStmt,
nkFromStmt, nkTemplateDef, nkMacroDef, nkStaticStmt:
discard
of nkPragma: genPragma(p, n)
of nkPragmaBlock: expr(p, n.lastSon, d)
of nkProcDef, nkFuncDef, nkMethodDef, nkConverterDef:
if n[genericParamsPos].kind == nkEmpty:
var prc = n[namePos].sym
# due to a bug/limitation in the lambda lifting, unused inner procs
# are not transformed correctly. We work around this issue (#411) here
# by ensuring it's no inner proc (owner is a module):
if prc.skipGenericOwner.kind == skModule and sfCompileTime notin prc.flags:
if ({sfExportc, sfCompilerProc} * prc.flags == {sfExportc}) or
(sfExportc in prc.flags and lfExportLib in prc.loc.flags) or
(prc.kind == skMethod):
# Generate proc even if empty body, bugfix #11651.
genProc(p.module, prc)
of nkParForStmt: genParForStmt(p, n)
of nkState: genState(p, n)
of nkGotoState:
# simply never set it back to 0 here from here on...
inc p.splitDecls
genGotoState(p, n)
of nkBreakState: genBreakState(p, n, d)
else: internalError(p.config, n.info, "expr(" & $n.kind & "); unknown node kind")
proc genNamedConstExpr(p: BProc, n: PNode; isConst: bool): Rope =
if n.kind == nkExprColonExpr: result = genBracedInit(p, n[1], isConst)
else: result = genBracedInit(p, n, isConst)
proc getDefaultValue(p: BProc; typ: PType; info: TLineInfo): Rope =
var t = skipTypes(typ, abstractRange+{tyOwned}-{tyTypeDesc})
case t.kind
of tyBool: result = rope"NIM_FALSE"
of tyEnum, tyChar, tyInt..tyInt64, tyUInt..tyUInt64: result = rope"0"
of tyFloat..tyFloat128: result = rope"0.0"
of tyCString, tyVar, tyLent, tyPointer, tyPtr, tyUntyped,
tyTyped, tyTypeDesc, tyStatic, tyRef, tyNil:
result = rope"NIM_NIL"
of tyString, tySequence:
if optSeqDestructors in p.config.globalOptions:
result = rope"{0, NIM_NIL}"
else:
result = rope"NIM_NIL"
of tyProc:
if t.callConv != ccClosure:
result = rope"NIM_NIL"
else:
result = rope"{NIM_NIL, NIM_NIL}"
of tyObject:
var count = 0
result.add "{"
getNullValueAuxT(p, t, t, t.n, nil, result, count, true, info)
result.add "}"
of tyTuple:
result = rope"{"
for i in 0..<t.len:
if i > 0: result.add ", "
result.add getDefaultValue(p, t[i], info)
result.add "}"
of tyArray:
result = rope"{"
for i in 0..<toInt(lengthOrd(p.config, t.sons[0])):
if i > 0: result.add ", "
result.add getDefaultValue(p, t.sons[1], info)
result.add "}"
#result = rope"{}"
of tySet:
if mapType(p.config, t) == ctArray: result = rope"{}"
else: result = rope"0"
else:
globalError(p.config, info, "cannot create null element for: " & $t.kind)
proc caseObjDefaultBranch(obj: PNode; branch: Int128): int =
for i in 1 ..< obj.len:
for j in 0 .. obj[i].len - 2:
if obj[i][j].kind == nkRange:
let x = getOrdValue(obj[i][j][0])
let y = getOrdValue(obj[i][j][1])
if branch >= x and branch <= y:
return i
elif getOrdValue(obj[i][j]) == branch:
return i
if obj[i].len == 1:
# else branch
return i
assert(false, "unreachable")
proc getNullValueAux(p: BProc; t: PType; obj, constOrNil: PNode,
result: var Rope; count: var int;
isConst: bool, info: TLineInfo) =
case obj.kind
of nkRecList:
for it in obj.sons:
getNullValueAux(p, t, it, constOrNil, result, count, isConst, info)
of nkRecCase:
getNullValueAux(p, t, obj[0], constOrNil, result, count, isConst, info)
if count > 0: result.add ", "
var branch = Zero
if constOrNil != nil:
## find kind value, default is zero if not specified
for i in 1..<constOrNil.len:
if constOrNil[i].kind == nkExprColonExpr:
if constOrNil[i][0].sym.name.id == obj[0].sym.name.id:
branch = getOrdValue(constOrNil[i][1])
break
elif i == obj[0].sym.position:
branch = getOrdValue(constOrNil[i])
break
let selectedBranch = caseObjDefaultBranch(obj, branch)
result.add "{"
var countB = 0
let b = lastSon(obj[selectedBranch])
# designated initilization is the only way to init non first element of unions
# branches are allowed to have no members (b.len == 0), in this case they don't need initializer
if b.kind == nkRecList and b.len > 0:
result.add "._" & mangleRecFieldName(p.module, obj[0].sym) & "_" & $selectedBranch & " = {"
getNullValueAux(p, t, b, constOrNil, result, countB, isConst, info)
result.add "}"
elif b.kind == nkSym:
result.add "." & mangleRecFieldName(p.module, b.sym) & " = "
getNullValueAux(p, t, b, constOrNil, result, countB, isConst, info)
result.add "}"
of nkSym:
if count > 0: result.add ", "
inc count
let field = obj.sym
if constOrNil != nil:
for i in 1..<constOrNil.len:
if constOrNil[i].kind == nkExprColonExpr:
if constOrNil[i][0].sym.name.id == field.name.id:
result.add genBracedInit(p, constOrNil[i][1], isConst)
return
elif i == field.position:
result.add genBracedInit(p, constOrNil[i], isConst)
return
# not found, produce default value:
result.add getDefaultValue(p, field.typ, info)
else:
localError(p.config, info, "cannot create null element for: " & $obj)
proc getNullValueAuxT(p: BProc; orig, t: PType; obj, constOrNil: PNode,
result: var Rope; count: var int;
isConst: bool, info: TLineInfo) =
var base = t[0]
let oldRes = result
let oldcount = count
if base != nil:
result.add "{"
base = skipTypes(base, skipPtrs)
getNullValueAuxT(p, orig, base, base.n, constOrNil, result, count, isConst, info)
result.add "}"
elif not isObjLackingTypeField(t):
result.add genTypeInfo(p.module, orig, obj.info)
inc count
getNullValueAux(p, t, obj, constOrNil, result, count, isConst, info)
# do not emit '{}' as that is not valid C:
if oldcount == count: result = oldRes
proc genConstObjConstr(p: BProc; n: PNode; isConst: bool): Rope =
result = nil
let t = n.typ.skipTypes(abstractInstOwned)
var count = 0
#if not isObjLackingTypeField(t) and not p.module.compileToCpp:
# result.addf("{$1}", [genTypeInfo(p.module, t)])
# inc count
if t.kind == tyObject:
getNullValueAuxT(p, t, t, t.n, n, result, count, isConst, n.info)
result = "{$1}$n" % [result]
proc genConstSimpleList(p: BProc, n: PNode; isConst: bool): Rope =
result = rope("{")
for i in 0..<n.len - 1:
result.addf("$1,$n", [genNamedConstExpr(p, n[i], isConst)])
if n.len > 0:
result.add(genNamedConstExpr(p, n[^1], isConst))
result.addf("}$n", [])
proc genConstSeq(p: BProc, n: PNode, t: PType; isConst: bool): Rope =
var data = "{{$1, $1 | NIM_STRLIT_FLAG}" % [n.len.rope]
if n.len > 0:
# array part needs extra curlies:
data.add(", {")
for i in 0..<n.len:
if i > 0: data.addf(",$n", [])
data.add genBracedInit(p, n[i], isConst)
data.add("}")
data.add("}")
result = getTempName(p.module)
let base = t.skipTypes(abstractInst)[0]
appcg(p.module, cfsData,
"static $5 struct {$n" &
" #TGenericSeq Sup;$n" &
" $1 data[$2];$n" &
"} $3 = $4;$n", [
getTypeDesc(p.module, base), n.len, result, data,
if isConst: "NIM_CONST" else: ""])
result = "(($1)&$2)" % [getTypeDesc(p.module, t), result]
proc genConstSeqV2(p: BProc, n: PNode, t: PType; isConst: bool): Rope =
var data = rope"{"
for i in 0..<n.len:
if i > 0: data.addf(",$n", [])
data.add genBracedInit(p, n[i], isConst)
data.add("}")
let payload = getTempName(p.module)
let base = t.skipTypes(abstractInst)[0]
appcg(p.module, cfsData,
"static $5 struct {$n" &
" NI cap; $1 data[$2];$n" &
"} $3 = {$2 | NIM_STRLIT_FLAG, $4};$n", [
getTypeDesc(p.module, base), n.len, payload, data,
if isConst: "const" else: ""])
result = "{$1, ($2*)&$3}" % [rope(n.len), getSeqPayloadType(p.module, t), payload]
proc genBracedInit(p: BProc, n: PNode; isConst: bool): Rope =
case n.kind
of nkHiddenStdConv, nkHiddenSubConv:
result = genBracedInit(p, n[1], isConst)
else:
var ty = tyNone
if n.typ == nil:
if n.kind in nkStrKinds:
ty = tyString
else:
internalError(p.config, n.info, "node has no type")
else:
ty = skipTypes(n.typ, abstractInstOwned + {tyStatic}).kind
case ty
of tySet:
let cs = toBitSet(p.config, n)
result = genRawSetData(cs, int(getSize(p.config, n.typ)))
of tySequence:
if optSeqDestructors in p.config.globalOptions:
result = genConstSeqV2(p, n, n.typ, isConst)
else:
result = genConstSeq(p, n, n.typ, isConst)
of tyProc:
if n.typ.callConv == ccClosure and n.len > 1 and n[1].kind == nkNilLit:
# Conversion: nimcall -> closure.
# this hack fixes issue that nkNilLit is expanded to {NIM_NIL,NIM_NIL}
# this behaviour is needed since closure_var = nil must be
# expanded to {NIM_NIL,NIM_NIL}
# in VM closures are initialized with nkPar(nkNilLit, nkNilLit)
# leading to duplicate code like this:
# "{NIM_NIL,NIM_NIL}, {NIM_NIL,NIM_NIL}"
if n[0].kind == nkNilLit:
result = ~"{NIM_NIL,NIM_NIL}"
else:
var d: TLoc
initLocExpr(p, n[0], d)
result = "{(($1) $2),NIM_NIL}" % [getClosureType(p.module, n.typ, clHalfWithEnv), rdLoc(d)]
else:
var d: TLoc
initLocExpr(p, n, d)
result = rdLoc(d)
of tyArray, tyTuple, tyOpenArray, tyVarargs:
result = genConstSimpleList(p, n, isConst)
of tyObject:
result = genConstObjConstr(p, n, isConst)
of tyString, tyCString:
if optSeqDestructors in p.config.globalOptions and n.kind != nkNilLit and ty == tyString:
result = genStringLiteralV2Const(p.module, n, isConst)
else:
var d: TLoc
initLocExpr(p, n, d)
result = rdLoc(d)
else:
var d: TLoc
initLocExpr(p, n, d)
result = rdLoc(d)