/
e2ir.d
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/
e2ir.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (c) 1999-2017 by Digital Mars, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/tocsym.d, _e2ir.d)
*/
module ddmd.e2ir;
// Online documentation: https://dlang.org/phobos/ddmd_e2ir.html
import core.stdc.stdio;
import core.stdc.stddef;
import core.stdc.string;
import core.stdc.time;
import ddmd.root.array;
import ddmd.root.ctfloat;
import ddmd.root.rmem;
import ddmd.root.rootobject;
import ddmd.root.stringtable;
import ddmd.aggregate;
import ddmd.arraytypes;
import ddmd.attrib;
import ddmd.ctfeexpr;
import ddmd.dclass;
import ddmd.declaration;
import ddmd.denum;
import ddmd.dmodule;
import ddmd.dscope;
import ddmd.dstruct;
import ddmd.dsymbol;
import ddmd.dtemplate;
import ddmd.errors;
import ddmd.expression;
import ddmd.func;
import ddmd.globals;
import ddmd.glue;
import ddmd.id;
import ddmd.init;
import ddmd.irstate;
import ddmd.mtype;
import ddmd.s2ir;
import ddmd.sideeffect;
import ddmd.statement;
import ddmd.target;
import ddmd.tocsym;
import ddmd.toctype;
import ddmd.toir;
import ddmd.tokens;
import ddmd.toobj;
import ddmd.typinf;
import ddmd.visitor;
import ddmd.backend.cc;
import ddmd.backend.cdef;
import ddmd.backend.cgcv;
import ddmd.backend.code;
import ddmd.backend.code_x86;
import ddmd.backend.cv4;
import ddmd.backend.dt;
import ddmd.backend.el;
import ddmd.backend.global;
import ddmd.backend.obj;
import ddmd.backend.oper;
import ddmd.backend.rtlsym;
import ddmd.backend.ty;
import ddmd.backend.type;
extern (C++):
alias Elems = Array!(elem *);
alias toSymbol = ddmd.tocsym.toSymbol;
alias toSymbol = ddmd.glue.toSymbol;
void objc_callfunc_setupMethodSelector(Type tret, FuncDeclaration fd, Type t, elem *ehidden, elem **esel);
void objc_callfunc_setupMethodCall(elem **ec, elem *ehidden, elem *ethis, TypeFunction tf);
void objc_callfunc_setupEp(elem *esel, elem **ep, int reverse);
void* mem_malloc(size_t);
@property int REGSIZE() { return _tysize[TYnptr]; }
/* If variable var of type typ is a reference
*/
bool ISREF(Declaration var, Type tb)
{
return (config.exe == EX_WIN64 && var.isParameter() &&
(var.type.size(Loc()) > REGSIZE || var.storage_class & STClazy))
|| var.isOut() || var.isRef();
}
/* If variable var of type typ is a reference due to Win64 calling conventions
*/
bool ISWIN64REF(Declaration var)
{
return (config.exe == EX_WIN64 && var.isParameter() &&
(var.type.size(Loc()) > REGSIZE || var.storage_class & STClazy))
&& !(var.isOut() || var.isRef());
}
/******************************************
* If argument to a function should use OPstrpar,
* fix it so it does and return it.
*/
private elem *useOPstrpar(elem *e)
{
tym_t ty = tybasic(e.Ety);
if (ty == TYstruct || ty == TYarray)
{
e = el_una(OPstrpar, TYstruct, e);
e.ET = e.EV.E1.ET;
assert(e.ET);
}
return e;
}
/************************************
* Call a function.
*/
private elem *callfunc(Loc loc,
IRState *irs,
int directcall, // 1: don't do virtual call
Type tret, // return type
elem *ec, // evaluates to function address
Type ectype, // original type of ec
FuncDeclaration fd, // if !=NULL, this is the function being called
Type t, // TypeDelegate or TypeFunction for this function
elem *ehidden, // if !=null, this is the 'hidden' argument
Expressions *arguments,
elem *esel = null) // selector for Objective-C methods (when not provided by fd)
{
elem *e;
elem *ethis = null;
elem *eside = null;
TypeFunction tf;
elem *eresult = ehidden;
version (none)
{
printf("callfunc(directcall = %d, tret = '%s', ec = %p, fd = %p)\n",
directcall, tret.toChars(), ec, fd);
printf("ec: "); elem_print(ec);
if (fd)
printf("fd = '%s', vtblIndex = %d, isVirtual() = %d\n", fd.toChars(), fd.vtblIndex, fd.isVirtual());
if (ehidden)
{ printf("ehidden: "); elem_print(ehidden); }
}
t = t.toBasetype();
if (t.ty == Tdelegate)
{
// A delegate consists of:
// { Object *this; Function *funcptr; }
assert(!fd);
assert(t.nextOf().ty == Tfunction);
tf = cast(TypeFunction)(t.nextOf());
ethis = ec;
ec = el_same(ðis);
ethis = el_una(global.params.is64bit ? OP128_64 : OP64_32, TYnptr, ethis); // get this
ec = array_toPtr(t, ec); // get funcptr
ec = el_una(OPind, totym(tf), ec);
}
else
{
assert(t.ty == Tfunction);
tf = cast(TypeFunction)(t);
}
const ty = fd ? toSymbol(fd).Stype.Tty : ec.Ety;
const left_to_right = tyrevfunc(ty); // left-to-right parameter evaluation
// (TYnpfunc, TYjfunc, TYfpfunc, TYf16func)
elem* ep = null;
const op = fd ? intrinsic_op(fd) : -1;
if (arguments && arguments.dim)
{
if (op == OPvector)
{
Expression arg = (*arguments)[0];
if (arg.op != TOKint64)
arg.error("simd operator must be an integer constant, not '%s'", arg.toChars());
}
/* Convert arguments[] to elems[] in left-to-right order
*/
const n = arguments.dim;
elem*[5] elems_array = void;
import core.stdc.stdlib : malloc, free;
auto elems = (n <= 5) ? elems_array.ptr : cast(elem**)malloc(arguments.dim * (elem*).sizeof);
assert(elems);
// j=1 if _arguments[] is first argument
int j = (tf.linkage == LINKd && tf.varargs == 1);
foreach (const i; 0 .. n)
{
Expression arg = (*arguments)[i];
elem *ea = toElem(arg, irs);
//printf("\targ[%d]: %s\n", i, arg.toChars());
size_t nparams = Parameter.dim(tf.parameters);
if (i - j < nparams && i >= j)
{
Parameter p = Parameter.getNth(tf.parameters, i - j);
if (p.storageClass & (STCout | STCref))
{
// Convert argument to a pointer
ea = addressElem(ea, arg.type.pointerTo());
goto L1;
}
}
if (config.exe == EX_WIN64 && arg.type.size(arg.loc) > REGSIZE && op == -1)
{
/* Copy to a temporary, and make the argument a pointer
* to that temporary.
*/
ea = addressElem(ea, arg.type, true);
goto L1;
}
if (config.exe == EX_WIN64 && tybasic(ea.Ety) == TYcfloat)
{
/* Treat a cfloat like it was a struct { float re,im; }
*/
ea.Ety = TYllong;
}
L1:
elems[i] = ea;
}
if (!left_to_right)
{
/* Avoid 'fixing' side effects of _array... functions as
* they were already working right from the olden days before this fix
*/
if (!(ec.Eoper == OPvar && fd.isArrayOp))
eside = fixArgumentEvaluationOrder(elems[0 .. n]);
}
foreach (const i; 0 .. n)
{
elems[i] = useOPstrpar(elems[i]);
}
if (!left_to_right) // swap order if right-to-left
{
auto i = 0;
auto k = n - 1;
while (i < k)
{
elem *tmp = elems[i];
elems[i] = elems[k];
elems[k] = tmp;
++i;
--k;
}
}
ep = el_params(cast(void**)elems, cast(int)n);
if (elems != elems_array.ptr)
free(elems);
}
objc_callfunc_setupMethodSelector(tret, fd, t, ehidden, &esel);
objc_callfunc_setupEp(esel, &ep, left_to_right);
const retmethod = retStyle(tf);
if (retmethod == RETstack)
{
if (!ehidden)
{
// Don't have one, so create one
type *tc;
Type tret2 = tf.next;
if (tret2.toBasetype().ty == Tstruct ||
tret2.toBasetype().ty == Tsarray)
tc = Type_toCtype(tret2);
else
tc = type_fake(totym(tret2));
Symbol *stmp = symbol_genauto(tc);
ehidden = el_ptr(stmp);
eresult = ehidden;
}
if ((global.params.isLinux ||
global.params.isOSX ||
global.params.isFreeBSD ||
global.params.isSolaris) && tf.linkage != LINKd)
{
// ehidden goes last on Linux/OSX C++
}
else
{
if (ep)
{
/* // BUG: implement
if (left_to_right && type_mangle(tfunc) == mTYman_cpp)
ep = el_param(ehidden,ep);
else
*/
ep = el_param(ep,ehidden);
}
else
ep = ehidden;
ehidden = null;
}
}
if (fd && fd.isMember2())
{
assert(op == -1); // members should not be intrinsics
AggregateDeclaration ad = fd.isThis();
if (ad)
{
ethis = ec;
if (ad.isStructDeclaration() && tybasic(ec.Ety) != TYnptr)
{
ethis = addressElem(ec, ectype);
}
if (el_sideeffect(ethis))
{
elem *ex = ethis;
ethis = el_copytotmp(&ex);
eside = el_combine(ex, eside);
}
}
else
{
// Evaluate ec for side effects
eside = el_combine(ec, eside);
}
Symbol *sfunc = toSymbol(fd);
if (esel)
{
objc_callfunc_setupMethodCall(&ec, ehidden, ethis, tf);
}
else if (!fd.isVirtual() ||
directcall || // BUG: fix
fd.isFinalFunc()
/* Future optimization: || (whole program analysis && not overridden)
*/
)
{
// make static call
ec = el_var(sfunc);
}
else
{
// make virtual call
assert(ethis);
elem *ev = el_same(ðis);
ev = el_una(OPind, TYnptr, ev);
uint vindex = fd.vtblIndex;
assert(cast(int)vindex >= 0);
// Build *(ev + vindex * 4)
if (!global.params.is64bit) assert(tysize(TYnptr) == 4);
ec = el_bin(OPadd,TYnptr,ev,el_long(TYsize_t, vindex * tysize(TYnptr)));
ec = el_una(OPind,TYnptr,ec);
ec = el_una(OPind,tybasic(sfunc.Stype.Tty),ec);
}
}
else if (fd && fd.isNested())
{
assert(!ethis);
ethis = getEthis(loc, irs, fd);
}
ep = el_param(ep, ethis);
if (ehidden)
ep = el_param(ep, ehidden); // if ehidden goes last
const tyret = totym(tret);
// Look for intrinsic functions
if (ec.Eoper == OPvar && op != -1)
{
el_free(ec);
if (OTbinary(op))
{
ep.Eoper = cast(ubyte)op;
ep.Ety = tyret;
e = ep;
if (op == OPeq)
{ /* This was a volatileStore(ptr, value) operation, rewrite as:
* *ptr = value
*/
e.EV.E1 = el_una(OPind, e.EV.E2.Ety | mTYvolatile, e.EV.E1);
}
if (op == OPscale)
{
elem *et = e.EV.E1;
e.EV.E1 = el_una(OPs32_d, TYdouble, e.EV.E2);
e.EV.E1 = el_una(OPd_ld, TYldouble, e.EV.E1);
e.EV.E2 = et;
}
else if (op == OPyl2x || op == OPyl2xp1)
{
elem *et = e.EV.E1;
e.EV.E1 = e.EV.E2;
e.EV.E2 = et;
}
}
else if (op == OPvector)
{
e = ep;
/* Recognize store operations as:
* (op OPparam (op1 OPparam op2))
* Rewrite as:
* (op1 OPvecsto (op OPparam op2))
* A separate operation is used for stores because it
* has a side effect, and so takes a different path through
* the optimizer.
*/
if (e.Eoper == OPparam &&
e.EV.E1.Eoper == OPconst &&
isXMMstore(cast(uint)el_tolong(e.EV.E1)))
{
elem *tmp = e.EV.E1;
e.EV.E1 = e.EV.E2.EV.E1;
e.EV.E2.EV.E1 = tmp;
e.Eoper = OPvecsto;
e.Ety = tyret;
}
else
e = el_una(op,tyret,ep);
}
else if (op == OPind)
e = el_una(op,mTYvolatile | tyret,ep);
else if (op == OPva_start && global.params.is64bit)
{
// (OPparam &va &arg)
// call as (OPva_start &va)
ep.Eoper = cast(ubyte)op;
ep.Ety = tyret;
e = ep;
elem *earg = e.EV.E2;
e.EV.E2 = null;
e = el_combine(earg, e);
}
else
e = el_una(op,tyret,ep);
}
else
{
/* Do not do "no side effect" calls if a hidden parameter is passed,
* as the return value is stored through the hidden parameter, which
* is a side effect.
*/
//printf("1: fd = %p prity = %d, nothrow = %d, retmethod = %d, use-assert = %d\n",
// fd, (fd ? fd.isPure() : tf.purity), tf.isnothrow, retmethod, global.params.useAssert);
//printf("\tfd = %s, tf = %s\n", fd.toChars(), tf.toChars());
/* assert() has 'implicit side effect' so disable this optimization.
*/
int ns = ((fd ? callSideEffectLevel(fd)
: callSideEffectLevel(t)) == 2 &&
retmethod != RETstack &&
!global.params.useAssert && global.params.optimize);
if (ep)
e = el_bin(ns ? OPcallns : OPcall, tyret, ec, ep);
else
e = el_una(ns ? OPucallns : OPucall, tyret, ec);
if (tf.varargs)
e.Eflags |= EFLAGS_variadic;
}
if (retmethod == RETstack)
{
if (global.params.isOSX && eresult)
/* ABI quirk: hidden pointer is not returned in registers
*/
e = el_combine(e, el_copytree(eresult));
e.Ety = TYnptr;
e = el_una(OPind, tyret, e);
}
if (tf.isref)
{
e.Ety = TYnptr;
e = el_una(OPind, tyret, e);
}
if (tybasic(tyret) == TYstruct)
{
e.ET = Type_toCtype(tret);
}
e = el_combine(eside, e);
return e;
}
/**********************************
* D presumes left-to-right argument evaluation, but we're evaluating things
* right-to-left here.
* 1. determine if this matters
* 2. fix it if it does
* Params:
* arguments = function arguments, these will get rewritten in place
* Returns:
* elem that evaluates the side effects
*/
private extern (D) elem *fixArgumentEvaluationOrder(elem*[] elems)
{
/* It matters if all are true:
* 1. at least one argument has side effects
* 2. at least one other argument may depend on side effects
*/
if (elems.length <= 1)
return null;
size_t ifirstside = 0; // index-1 of first side effect
size_t ifirstdep = 0; // index-1 of first dependency on side effect
foreach (i, e; elems)
{
switch (e.Eoper)
{
case OPconst:
case OPrelconst:
case OPstring:
continue;
default:
break;
}
if (el_sideeffect(e))
{
if (!ifirstside)
ifirstside = i + 1;
else if (!ifirstdep)
ifirstdep = i + 1;
}
else
{
if (!ifirstdep)
ifirstdep = i + 1;
}
if (ifirstside && ifirstdep)
break;
}
if (!ifirstdep || !ifirstside)
return null;
/* Now fix by appending side effects and dependencies to eside and replacing
* argument with a temporary.
* Rely on the optimizer removing some unneeded ones using flow analysis.
*/
elem* eside = null;
foreach (i, e; elems)
{
while (e.Eoper == OPcomma)
{
eside = el_combine(eside, e.EV.E1);
e = e.EV.E2;
elems[i] = e;
}
switch (e.Eoper)
{
case OPconst:
case OPrelconst:
case OPstring:
continue;
default:
break;
}
elem *es = e;
elems[i] = el_copytotmp(&es);
eside = el_combine(eside, es);
}
return eside;
}
/*******************************************
* Take address of an elem.
*/
elem *addressElem(elem *e, Type t, bool alwaysCopy = false)
{
//printf("addressElem()\n");
elem **pe;
for (pe = &e; (*pe).Eoper == OPcomma; pe = &(*pe).EV.E2)
{
}
// For conditional operator, both branches need conversion.
if ((*pe).Eoper == OPcond)
{
elem *ec = (*pe).EV.E2;
ec.EV.E1 = addressElem(ec.EV.E1, t, alwaysCopy);
ec.EV.E2 = addressElem(ec.EV.E2, t, alwaysCopy);
(*pe).Ejty = (*pe).Ety = cast(ubyte)ec.EV.E1.Ety;
(*pe).ET = ec.EV.E1.ET;
e.Ety = TYnptr;
return e;
}
if (alwaysCopy || ((*pe).Eoper != OPvar && (*pe).Eoper != OPind))
{
elem *e2 = *pe;
type *tx;
// Convert to ((tmp=e2),tmp)
TY ty;
if (t && ((ty = t.toBasetype().ty) == Tstruct || ty == Tsarray))
tx = Type_toCtype(t);
else if (tybasic(e2.Ety) == TYstruct)
{
assert(t); // don't know of a case where this can be null
tx = Type_toCtype(t);
}
else
tx = type_fake(e2.Ety);
Symbol *stmp = symbol_genauto(tx);
elem *eeq = el_bin(OPeq,e2.Ety,el_var(stmp),e2);
if (tybasic(e2.Ety) == TYstruct)
{
eeq.Eoper = OPstreq;
eeq.ET = e2.ET;
}
else if (tybasic(e2.Ety) == TYarray)
{
eeq.Eoper = OPstreq;
eeq.Ejty = eeq.Ety = TYstruct;
eeq.ET = t ? Type_toCtype(t) : tx;
}
*pe = el_bin(OPcomma,e2.Ety,eeq,el_var(stmp));
}
e = el_una(OPaddr,TYnptr,e);
return e;
}
/*****************************************
* Convert array to a pointer to the data.
*/
elem *array_toPtr(Type t, elem *e)
{
//printf("array_toPtr()\n");
//elem_print(e);
t = t.toBasetype();
switch (t.ty)
{
case Tpointer:
break;
case Tarray:
case Tdelegate:
if (e.Eoper == OPcomma)
{
e.Ety = TYnptr;
e.EV.E2 = array_toPtr(t, e.EV.E2);
}
else if (e.Eoper == OPpair)
{
e.Eoper = OPcomma;
e.Ety = TYnptr;
}
else
{
version (all)
e = el_una(OPmsw, TYnptr, e);
else
{
e = el_una(OPaddr, TYnptr, e);
e = el_bin(OPadd, TYnptr, e, el_long(TYsize_t, 4));
e = el_una(OPind, TYnptr, e);
}
}
break;
case Tsarray:
//e = el_una(OPaddr, TYnptr, e);
e = addressElem(e, t);
break;
default:
t.print();
assert(0);
}
return e;
}
/*****************************************
* Convert array to a dynamic array.
*/
elem *array_toDarray(Type t, elem *e)
{
uint dim;
elem *ef = null;
elem *ex;
//printf("array_toDarray(t = %s)\n", t.toChars());
//elem_print(e);
t = t.toBasetype();
switch (t.ty)
{
case Tarray:
break;
case Tsarray:
e = addressElem(e, t);
dim = cast(uint)(cast(TypeSArray)t).dim.toInteger();
e = el_pair(TYdarray, el_long(TYsize_t, dim), e);
break;
default:
L1:
switch (e.Eoper)
{
case OPconst:
{
size_t len = tysize(e.Ety);
elem *es = el_calloc();
es.Eoper = OPstring;
// freed in el_free
es.EV.Vstring = cast(char*)mem_malloc(len);
memcpy(es.EV.Vstring, &e.EV, len);
es.EV.Vstrlen = len;
es.Ety = TYnptr;
e = es;
break;
}
case OPvar:
e = el_una(OPaddr, TYnptr, e);
break;
case OPcomma:
ef = el_combine(ef, e.EV.E1);
ex = e;
e = e.EV.E2;
ex.EV.E1 = null;
ex.EV.E2 = null;
el_free(ex);
goto L1;
case OPind:
ex = e;
e = e.EV.E1;
ex.EV.E1 = null;
ex.EV.E2 = null;
el_free(ex);
break;
default:
{
// Copy expression to a variable and take the
// address of that variable.
Symbol *stmp;
tym_t ty = tybasic(e.Ety);
if (ty == TYstruct)
{ uint sz = cast(uint)type_size(e.ET);
if (sz <= 4)
ty = TYint;
else if (sz <= 8)
ty = TYllong;
else if (sz <= 16)
ty = TYcent;
}
e.Ety = ty;
stmp = symbol_genauto(type_fake(ty));
e = el_bin(OPeq, e.Ety, el_var(stmp), e);
e = el_bin(OPcomma, TYnptr, e, el_una(OPaddr, TYnptr, el_var(stmp)));
break;
}
}
dim = 1;
e = el_pair(TYdarray, el_long(TYsize_t, dim), e);
break;
}
return el_combine(ef, e);
}
/************************************
*/
elem *sarray_toDarray(Loc loc, Type tfrom, Type tto, elem *e)
{
//printf("sarray_toDarray()\n");
//elem_print(e);
dinteger_t dim = (cast(TypeSArray)tfrom).dim.toInteger();
if (tto)
{
uint fsize = cast(uint)tfrom.nextOf().size();
uint tsize = cast(uint)tto.nextOf().size();
if ((dim * fsize) % tsize != 0)
{
// have to change to Internal Compiler Error?
error(loc, "cannot cast %s to %s since sizes don't line up", tfrom.toChars(), tto.toChars());
}
dim = (dim * fsize) / tsize;
}
elem *elen = el_long(TYsize_t, dim);
e = addressElem(e, tfrom);
e = el_pair(TYdarray, elen, e);
return e;
}
/************************************
*/
elem *getTypeInfo(Type t, IRState *irs)
{
assert(t.ty != Terror);
genTypeInfo(t, null);
elem *e = el_ptr(toSymbol(t.vtinfo));
return e;
}
/********************************************
* Determine if t is a struct that has postblit.
*/
StructDeclaration needsPostblit(Type t)
{
t = t.baseElemOf();
if (t.ty == Tstruct)
{
StructDeclaration sd = (cast(TypeStruct)t).sym;
if (sd.postblit)
return sd;
}
return null;
}
/********************************************
* Determine if t is a struct that has destructor.
*/
StructDeclaration needsDtor(Type t)
{
t = t.baseElemOf();
if (t.ty == Tstruct)
{
StructDeclaration sd = (cast(TypeStruct)t).sym;
if (sd.dtor)
return sd;
}
return null;
}
/*******************************************
* Set an array pointed to by eptr to evalue:
* eptr[0..edim] = evalue;
* Params:
* eptr = where to write the data to
* edim = number of times to write evalue to eptr[]
* tb = type of evalue
* evalue = value to write
* irs = context
* op = TOKblit, TOKassign, or TOKconstruct
* Returns:
* created IR code
*/
private elem *setArray(elem *eptr, elem *edim, Type tb, elem *evalue, IRState *irs, int op)
{
assert(op == TOKblit || op == TOKassign || op == TOKconstruct);
const sz = cast(uint)tb.size();
Lagain:
int r;
switch (tb.ty)
{
case Tfloat80:
case Timaginary80:
r = RTLSYM_MEMSET80;
break;
case Tcomplex80:
r = RTLSYM_MEMSET160;
break;
case Tcomplex64:
r = RTLSYM_MEMSET128;
break;
case Tfloat32:
case Timaginary32:
if (!global.params.is64bit)
goto Ldefault; // legacy binary compatibility
r = RTLSYM_MEMSETFLOAT;
break;
case Tfloat64:
case Timaginary64:
if (!global.params.is64bit)
goto Ldefault; // legacy binary compatibility
r = RTLSYM_MEMSETDOUBLE;
break;
case Tstruct:
{
if (!global.params.is64bit)
goto Ldefault;
TypeStruct tc = cast(TypeStruct)tb;
StructDeclaration sd = tc.sym;
if (sd.arg1type && !sd.arg2type)
{
tb = sd.arg1type;
goto Lagain;
}
goto Ldefault;
}
case Tvector:
r = RTLSYM_MEMSETSIMD;
break;
default:
Ldefault:
switch (sz)
{
case 1: r = RTLSYM_MEMSET8; break;
case 2: r = RTLSYM_MEMSET16; break;
case 4: r = RTLSYM_MEMSET32; break;
case 8: r = RTLSYM_MEMSET64; break;
case 16: r = global.params.is64bit ? RTLSYM_MEMSET128ii : RTLSYM_MEMSET128; break;
default: r = RTLSYM_MEMSETN; break;
}
/* Determine if we need to do postblit
*/
if (op != TOKblit)
{
if (needsPostblit(tb) || needsDtor(tb))
{
/* Need to do postblit/destructor.
* void *_d_arraysetassign(void *p, void *value, int dim, TypeInfo ti);
*/
r = (op == TOKconstruct) ? RTLSYM_ARRAYSETCTOR : RTLSYM_ARRAYSETASSIGN;
evalue = el_una(OPaddr, TYnptr, evalue);
// This is a hack so we can call postblits on const/immutable objects.
elem *eti = getTypeInfo(tb.unSharedOf().mutableOf(), irs);
elem *e = el_params(eti, edim, evalue, eptr, null);
e = el_bin(OPcall,TYnptr,el_var(getRtlsym(r)),e);
return e;
}
}
if (global.params.is64bit && tybasic(evalue.Ety) == TYstruct && r != RTLSYM_MEMSETN)
{
/* If this struct is in-memory only, i.e. cannot necessarily be passed as
* a gp register parameter.
* The trouble is that memset() is expecting the argument to be in a gp
* register, but the argument pusher may have other ideas on I64.
* MEMSETN is inefficient, though.
*/
if (tybasic(evalue.ET.Tty) == TYstruct)
{
type *t1 = evalue.ET.Ttag.Sstruct.Sarg1type;
type *t2 = evalue.ET.Ttag.Sstruct.Sarg2type;
if (!t1 && !t2)
{
if (config.exe != EX_WIN64 || sz > 8)
r = RTLSYM_MEMSETN;
}
else if (config.exe != EX_WIN64 &&
r == RTLSYM_MEMSET128ii &&
t1.Tty == TYdouble &&
t2.Tty == TYdouble)
r = RTLSYM_MEMSET128;
}
}
if (r == RTLSYM_MEMSETN)
{
// void *_memsetn(void *p, void *value, int dim, int sizelem)
evalue = el_una(OPaddr, TYnptr, evalue);
elem *esz = el_long(TYsize_t, sz);
elem *e = el_params(esz, edim, evalue, eptr, null);
e = el_bin(OPcall,TYnptr,el_var(getRtlsym(r)),e);
return e;
}
break;
}
if (sz > 1 && sz <= 8 &&
evalue.Eoper == OPconst && el_allbits(evalue, 0))
{
r = RTLSYM_MEMSET8;
edim = el_bin(OPmul, TYsize_t, edim, el_long(TYsize_t, sz));