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toir.d
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toir.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (C) 1999-2019 by The D Language Foundation, 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, _toir.d)
* Documentation: https://dlang.org/phobos/dmd_toir.html
* Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/toir.d
*/
module dmd.toir;
import core.checkedint;
import core.stdc.stdio;
import core.stdc.string;
import core.stdc.stdlib;
import dmd.root.array;
import dmd.root.outbuffer;
import dmd.root.rmem;
import dmd.backend.cdef;
import dmd.backend.cc;
import dmd.backend.dt;
import dmd.backend.el;
import dmd.backend.global;
import dmd.backend.oper;
import dmd.backend.rtlsym;
import dmd.backend.ty;
import dmd.backend.type;
import dmd.aggregate;
import dmd.arraytypes;
import dmd.dclass;
import dmd.declaration;
import dmd.dmangle;
import dmd.dmodule;
import dmd.dstruct;
import dmd.dsymbol;
import dmd.dtemplate;
import dmd.toctype;
import dmd.e2ir;
import dmd.func;
import dmd.globals;
import dmd.glue;
import dmd.identifier;
import dmd.id;
import dmd.irstate;
import dmd.mtype;
import dmd.target;
import dmd.tocvdebug;
import dmd.tocsym;
alias toSymbol = dmd.tocsym.toSymbol;
alias toSymbol = dmd.glue.toSymbol;
extern (C++):
/*********************************************
* Produce elem which increments the usage count for a particular line.
* Sets corresponding bit in bitmap `m.covb[linnum]`.
* Used to implement -cov switch (coverage analysis).
* Params:
* irs = context
* loc = line and file of what line to show usage for
* Returns:
* elem that increments the line count
* References:
* https://dlang.org/dmd-windows.html#switch-cov
*/
extern (D) elem *incUsageElem(IRState *irs, const ref Loc loc)
{
uint linnum = loc.linnum;
Module m = cast(Module)irs.blx._module;
if (!m.cov || !linnum ||
loc.filename != m.srcfile.toChars())
return null;
//printf("cov = %p, covb = %p, linnum = %u\n", m.cov, m.covb, p, linnum);
linnum--; // from 1-based to 0-based
/* Set bit in covb[] indicating this is a valid code line number
*/
uint *p = m.covb;
if (p) // covb can be null if it has already been written out to its .obj file
{
assert(linnum < m.numlines);
p += linnum / ((*p).sizeof * 8);
*p |= 1 << (linnum & ((*p).sizeof * 8 - 1));
}
/* Generate: *(m.cov + linnum * 4) += 1
*/
elem *e;
e = el_ptr(m.cov);
e = el_bin(OPadd, TYnptr, e, el_long(TYuint, linnum * 4));
e = el_una(OPind, TYuint, e);
e = el_bin(OPaddass, TYuint, e, el_long(TYuint, 1));
return e;
}
/******************************************
* Return elem that evaluates to the static frame pointer for function fd.
* If fd is a member function, the returned expression will compute the value
* of fd's 'this' variable.
* This routine is critical for implementing nested functions.
*/
elem *getEthis(const ref Loc loc, IRState *irs, Dsymbol fd)
{
elem *ethis;
FuncDeclaration thisfd = irs.getFunc();
Dsymbol fdparent = fd.toParent2();
Dsymbol fdp = fdparent;
/* These two are compiler generated functions for the in and out contracts,
* and are called from an overriding function, not just the one they're
* nested inside, so this hack sets fdparent so it'll pass
*/
if (fdparent != thisfd && (fd.ident == Id.require || fd.ident == Id.ensure))
{
FuncDeclaration fdthis = thisfd;
for (size_t i = 0; ; )
{
if (i == fdthis.foverrides.dim)
{
if (i == 0)
break;
fdthis = fdthis.foverrides[0];
i = 0;
continue;
}
if (fdthis.foverrides[i] == fdp)
{
fdparent = thisfd;
break;
}
i++;
}
}
//printf("[%s] getEthis(thisfd = '%s', fd = '%s', fdparent = '%s')\n", loc.toChars(), thisfd.toPrettyChars(), fd.toPrettyChars(), fdparent.toPrettyChars());
if (fdparent == thisfd)
{
/* Going down one nesting level, i.e. we're calling
* a nested function from its enclosing function.
*/
if (irs.sclosure && !(fd.ident == Id.require || fd.ident == Id.ensure))
{
ethis = el_var(irs.sclosure);
}
else if (irs.sthis)
{
// We have a 'this' pointer for the current function
if (fdp != thisfd)
{
/* fdparent (== thisfd) is a derived member function,
* fdp is the overridden member function in base class, and
* fd is the nested function '__require' or '__ensure'.
* Even if there's a closure environment, we should give
* original stack data as the nested function frame.
* See also: SymbolExp.toElem() in e2ir.c (https://issues.dlang.org/show_bug.cgi?id=9383 fix)
*/
/* Address of 'sthis' gives the 'this' for the nested
* function.
*/
//printf("L%d fd = %s, fdparent = %s, fd.toParent2() = %s\n",
// __LINE__, fd.toPrettyChars(), fdparent.toPrettyChars(), fdp.toPrettyChars());
assert(fd.ident == Id.require || fd.ident == Id.ensure);
assert(thisfd.hasNestedFrameRefs());
ClassDeclaration cdp = fdp.isThis().isClassDeclaration();
ClassDeclaration cd = thisfd.isThis().isClassDeclaration();
assert(cdp && cd);
int offset;
cdp.isBaseOf(cd, &offset);
assert(offset != ClassDeclaration.OFFSET_RUNTIME);
//printf("%s to %s, offset = %d\n", cd.toChars(), cdp.toChars(), offset);
if (offset)
{
/* https://issues.dlang.org/show_bug.cgi?id=7517: If fdp is declared in interface, offset the
* 'this' pointer to get correct interface type reference.
*/
Symbol *stmp = symbol_genauto(TYnptr);
ethis = el_bin(OPadd, TYnptr, el_var(irs.sthis), el_long(TYsize_t, offset));
ethis = el_bin(OPeq, TYnptr, el_var(stmp), ethis);
ethis = el_combine(ethis, el_ptr(stmp));
//elem_print(ethis);
}
else
ethis = el_ptr(irs.sthis);
}
else if (thisfd.hasNestedFrameRefs())
{
/* Local variables are referenced, can't skip.
* Address of 'sthis' gives the 'this' for the nested
* function.
*/
ethis = el_ptr(irs.sthis);
}
else
{
/* If no variables in the current function's frame are
* referenced by nested functions, then we can 'skip'
* adding this frame into the linked list of stack
* frames.
*/
ethis = el_var(irs.sthis);
}
}
else
{
/* No 'this' pointer for current function,
*/
if (thisfd.hasNestedFrameRefs())
{
/* OPframeptr is an operator that gets the frame pointer
* for the current function, i.e. for the x86 it gets
* the value of EBP
*/
ethis = el_long(TYnptr, 0);
ethis.Eoper = OPframeptr;
}
else
{
/* Use null if no references to the current function's frame
*/
ethis = el_long(TYnptr, 0);
}
}
}
else
{
if (!irs.sthis) // if no frame pointer for this function
{
fd.error(loc, "is a nested function and cannot be accessed from `%s`", irs.getFunc().toPrettyChars());
return el_long(TYnptr, 0); // error recovery
}
/* Go up a nesting level, i.e. we need to find the 'this'
* of an enclosing function.
* Our 'enclosing function' may also be an inner class.
*/
ethis = el_var(irs.sthis);
Dsymbol s = thisfd;
while (fd != s)
{
FuncDeclaration fdp2 = s.toParent2().isFuncDeclaration();
//printf("\ts = '%s'\n", s.toChars());
thisfd = s.isFuncDeclaration();
if (thisfd)
{
/* Enclosing function is a function.
*/
// Error should have been caught by front end
assert(thisfd.isNested() || thisfd.vthis);
}
else
{
/* Enclosed by an aggregate. That means the current
* function must be a member function of that aggregate.
*/
AggregateDeclaration ad = s.isAggregateDeclaration();
if (!ad)
{
Lnoframe:
irs.getFunc().error(loc, "cannot get frame pointer to `%s`", fd.toPrettyChars());
return el_long(TYnptr, 0); // error recovery
}
ClassDeclaration cd = ad.isClassDeclaration();
ClassDeclaration cdx = fd.isClassDeclaration();
if (cd && cdx && cdx.isBaseOf(cd, null))
break;
StructDeclaration sd = ad.isStructDeclaration();
if (fd == sd)
break;
if (!ad.isNested() || !ad.vthis)
goto Lnoframe;
ethis = el_bin(OPadd, TYnptr, ethis, el_long(TYsize_t, ad.vthis.offset));
ethis = el_una(OPind, TYnptr, ethis);
}
if (fdparent == s.toParent2())
break;
/* Remember that frames for functions that have no
* nested references are skipped in the linked list
* of frames.
*/
if (fdp2 && fdp2.hasNestedFrameRefs())
ethis = el_una(OPind, TYnptr, ethis);
s = s.toParent2();
assert(s);
}
}
version (none)
{
printf("ethis:\n");
elem_print(ethis);
printf("\n");
}
return ethis;
}
/*************************
* Initialize the hidden aggregate member, vthis, with
* the context pointer.
* Returns:
* *(ey + ad.vthis.offset) = this;
*/
elem *setEthis(const ref Loc loc, IRState *irs, elem *ey, AggregateDeclaration ad)
{
elem *ethis;
FuncDeclaration thisfd = irs.getFunc();
int offset = 0;
Dsymbol adp = ad.toParent2(); // class/func we're nested in
//printf("[%s] setEthis(ad = %s, adp = %s, thisfd = %s)\n", loc.toChars(), ad.toChars(), adp.toChars(), thisfd.toChars());
if (adp == thisfd)
{
ethis = getEthis(loc, irs, ad);
}
else if (thisfd.vthis &&
(adp == thisfd.toParent2() ||
(adp.isClassDeclaration() &&
adp.isClassDeclaration().isBaseOf(thisfd.toParent2().isClassDeclaration(), &offset)
)
)
)
{
/* Class we're new'ing is at the same level as thisfd
*/
assert(offset == 0); // BUG: should handle this case
ethis = el_var(irs.sthis);
}
else
{
ethis = getEthis(loc, irs, adp);
FuncDeclaration fdp = adp.isFuncDeclaration();
if (fdp && fdp.hasNestedFrameRefs())
ethis = el_una(OPaddr, TYnptr, ethis);
}
ey = el_bin(OPadd, TYnptr, ey, el_long(TYsize_t, ad.vthis.offset));
ey = el_una(OPind, TYnptr, ey);
ey = el_bin(OPeq, TYnptr, ey, ethis);
return ey;
}
enum NotIntrinsic = -1;
/*******************************************
* Convert intrinsic function to operator.
* Returns:
* that operator, NotIntrinsic if not an intrinsic function.
*/
int intrinsic_op(FuncDeclaration fd)
{
fd = fd.toAliasFunc();
const char *name = mangleExact(fd);
//printf("intrinsic_op(%s)\n", name);
__gshared immutable char*[11] std_namearray =
[
/* The names are mangled differently because of the pure and
* nothrow attributes.
*/
"4math3cosFNaNbNiNfeZe",
"4math3sinFNaNbNiNfeZe",
"4math4fabsFNaNbNiNfeZe",
"4math4rintFNaNbNiNfeZe",
"4math4sqrtFNaNbNiNfdZd",
"4math4sqrtFNaNbNiNfeZe",
"4math4sqrtFNaNbNiNffZf",
"4math4yl2xFNaNbNiNfeeZe",
"4math5ldexpFNaNbNiNfeiZe",
"4math6rndtolFNaNbNiNfeZl",
"4math6yl2xp1FNaNbNiNfeeZe",
];
__gshared immutable char*[11] std_namearray64 =
[
/* The names are mangled differently because of the pure and
* nothrow attributes.
*/
"4math3cosFNaNbNiNfeZe",
"4math3sinFNaNbNiNfeZe",
"4math4fabsFNaNbNiNfeZe",
"4math4rintFNaNbNiNfeZe",
"4math4sqrtFNaNbNiNfdZd",
"4math4sqrtFNaNbNiNfeZe",
"4math4sqrtFNaNbNiNffZf",
"4math4yl2xFNaNbNiNfeeZe",
"4math5ldexpFNaNbNiNfeiZe",
"4math6rndtolFNaNbNiNfeZl",
"4math6yl2xp1FNaNbNiNfeeZe",
];
__gshared immutable ubyte[11] std_ioptab =
[
OPcos,
OPsin,
OPabs,
OPrint,
OPsqrt,
OPsqrt,
OPsqrt,
OPyl2x,
OPscale,
OPrndtol,
OPyl2xp1,
];
__gshared immutable char*[70] core_namearray =
[
//cos
"4math3cosFNaNbNiNfdZd",
"4math3cosFNaNbNiNfeZe",
"4math3cosFNaNbNiNffZf",
//sin
"4math3sinFNaNbNiNfdZd",
"4math3sinFNaNbNiNfeZe",
"4math3sinFNaNbNiNffZf",
//fabs
"4math4fabsFNaNbNiNfdZd",
"4math4fabsFNaNbNiNfeZe",
"4math4fabsFNaNbNiNffZf",
//rint
"4math4rintFNaNbNiNfdZd",
"4math4rintFNaNbNiNfeZe",
"4math4rintFNaNbNiNffZf",
//sqrt
"4math4sqrtFNaNbNiNfdZd",
"4math4sqrtFNaNbNiNfeZe",
"4math4sqrtFNaNbNiNffZf",
//yl2x
"4math4yl2xFNaNbNiNfddZd",
"4math4yl2xFNaNbNiNfeeZe",
"4math4yl2xFNaNbNiNfffZf",
//ldexp
"4math5ldexpFNaNbNiNfdiZd",
"4math5ldexpFNaNbNiNfeiZe",
"4math5ldexpFNaNbNiNffiZf",
//rndtol
"4math6rndtolFNaNbNiNfdZl",
"4math6rndtolFNaNbNiNfeZl",
"4math6rndtolFNaNbNiNffZl",
//yl2xp1
"4math6yl2xp1FNaNbNiNfddZd",
"4math6yl2xp1FNaNbNiNfeeZe",
"4math6yl2xp1FNaNbNiNfffZf",
"4simd10__prefetchFNaNbNiNfxPvhZv",
"4simd10__simd_stoFNaNbNiNfEQBgQBe3XMMNhG16vQgZQj",
"4simd10__simd_stoFNaNbNiNfEQBgQBe3XMMdNhG16vZQh",
"4simd10__simd_stoFNaNbNiNfEQBgQBe3XMMfNhG16vZQh",
"4simd6__simdFNaNbNiNfEQBbQz3XMMNhG16vQgZQj",
"4simd6__simdFNaNbNiNfEQBbQz3XMMNhG16vQghZQk",
"4simd6__simdFNaNbNiNfEQBbQz3XMMNhG16vZQh",
"4simd6__simdFNaNbNiNfEQBbQz3XMMdZNhG16v",
"4simd6__simdFNaNbNiNfEQBbQz3XMMfZNhG16v",
"4simd9__simd_ibFNaNbNiNfEQBeQBc3XMMNhG16vhZQi",
// @deprecated volatileLoad
"5bitop12volatileLoadFNbNiNfPhZh",
"5bitop12volatileLoadFNbNiNfPkZk",
"5bitop12volatileLoadFNbNiNfPmZm",
"5bitop12volatileLoadFNbNiNfPtZt",
// @deprecated volatileStore
"5bitop13volatileStoreFNbNiNfPhhZv",
"5bitop13volatileStoreFNbNiNfPkkZv",
"5bitop13volatileStoreFNbNiNfPmmZv",
"5bitop13volatileStoreFNbNiNfPttZv",
"5bitop3bsfFNaNbNiNfkZi",
"5bitop3bsfFNaNbNiNfmZi",
"5bitop3bsrFNaNbNiNfkZi",
"5bitop3bsrFNaNbNiNfmZi",
"5bitop3btcFNaNbNiPkkZi",
"5bitop3btrFNaNbNiPkkZi",
"5bitop3btsFNaNbNiPkkZi",
"5bitop3inpFNbNikZh",
"5bitop4inplFNbNikZk",
"5bitop4inpwFNbNikZt",
"5bitop4outpFNbNikhZh",
"5bitop5bswapFNaNbNiNfkZk",
"5bitop5outplFNbNikkZk",
"5bitop5outpwFNbNiktZt",
"5bitop7_popcntFNaNbNiNfkZi",
"5bitop7_popcntFNaNbNiNfmxx", // don't find 64 bit version in 32 bit code
"5bitop7_popcntFNaNbNiNftZt",
// volatileLoad
"8volatile12volatileLoadFNbNiNfPhZh",
"8volatile12volatileLoadFNbNiNfPkZk",
"8volatile12volatileLoadFNbNiNfPmZm",
"8volatile12volatileLoadFNbNiNfPtZt",
// volatileStore
"8volatile13volatileStoreFNbNiNfPhhZv",
"8volatile13volatileStoreFNbNiNfPkkZv",
"8volatile13volatileStoreFNbNiNfPmmZv",
"8volatile13volatileStoreFNbNiNfPttZv",
];
__gshared immutable char*[70] core_namearray64 =
[
//cos
"4math3cosFNaNbNiNfdZd",
"4math3cosFNaNbNiNfeZe",
"4math3cosFNaNbNiNffZf",
//sin
"4math3sinFNaNbNiNfdZd",
"4math3sinFNaNbNiNfeZe",
"4math3sinFNaNbNiNffZf",
//fabs
"4math4fabsFNaNbNiNfdZd",
"4math4fabsFNaNbNiNfeZe",
"4math4fabsFNaNbNiNffZf",
//rint
"4math4rintFNaNbNiNfdZd",
"4math4rintFNaNbNiNfeZe",
"4math4rintFNaNbNiNffZf",
//sqrt
"4math4sqrtFNaNbNiNfdZd",
"4math4sqrtFNaNbNiNfeZe",
"4math4sqrtFNaNbNiNffZf",
//yl2x
"4math4yl2xFNaNbNiNfddZd",
"4math4yl2xFNaNbNiNfeeZe",
"4math4yl2xFNaNbNiNfffZf",
//ldexp
"4math5ldexpFNaNbNiNfdiZd",
"4math5ldexpFNaNbNiNfeiZe",
"4math5ldexpFNaNbNiNffiZf",
//rndtol
"4math6rndtolFNaNbNiNfdZl",
"4math6rndtolFNaNbNiNfeZl",
"4math6rndtolFNaNbNiNffZl",
//yl2xp1
"4math6yl2xp1FNaNbNiNfddZd",
"4math6yl2xp1FNaNbNiNfeeZe",
"4math6yl2xp1FNaNbNiNfffZf",
"4simd10__prefetchFNaNbNiNfxPvhZv",
"4simd10__simd_stoFNaNbNiNfEQBgQBe3XMMNhG16vQgZQj",
"4simd10__simd_stoFNaNbNiNfEQBgQBe3XMMdNhG16vZQh",
"4simd10__simd_stoFNaNbNiNfEQBgQBe3XMMfNhG16vZQh",
"4simd6__simdFNaNbNiNfEQBbQz3XMMNhG16vQgZQj",
"4simd6__simdFNaNbNiNfEQBbQz3XMMNhG16vQghZQk",
"4simd6__simdFNaNbNiNfEQBbQz3XMMNhG16vZQh",
"4simd6__simdFNaNbNiNfEQBbQz3XMMdZNhG16v",
"4simd6__simdFNaNbNiNfEQBbQz3XMMfZNhG16v",
"4simd9__simd_ibFNaNbNiNfEQBeQBc3XMMNhG16vhZQi",
// @deprecated volatileLoad
"5bitop12volatileLoadFNbNiNfPhZh",
"5bitop12volatileLoadFNbNiNfPkZk",
"5bitop12volatileLoadFNbNiNfPmZm",
"5bitop12volatileLoadFNbNiNfPtZt",
// @deprecated volatileStore
"5bitop13volatileStoreFNbNiNfPhhZv",
"5bitop13volatileStoreFNbNiNfPkkZv",
"5bitop13volatileStoreFNbNiNfPmmZv",
"5bitop13volatileStoreFNbNiNfPttZv",
"5bitop3bsfFNaNbNiNfkZi",
"5bitop3bsfFNaNbNiNfmZi",
"5bitop3bsrFNaNbNiNfkZi",
"5bitop3bsrFNaNbNiNfmZi",
"5bitop3btcFNaNbNiPmmZi",
"5bitop3btrFNaNbNiPmmZi",
"5bitop3btsFNaNbNiPmmZi",
"5bitop3inpFNbNikZh",
"5bitop4inplFNbNikZk",
"5bitop4inpwFNbNikZt",
"5bitop4outpFNbNikhZh",
"5bitop5bswapFNaNbNiNfkZk",
"5bitop5outplFNbNikkZk",
"5bitop5outpwFNbNiktZt",
"5bitop7_popcntFNaNbNiNfkZi",
"5bitop7_popcntFNaNbNiNfmZi",
"5bitop7_popcntFNaNbNiNftZt",
// volatileLoad
"8volatile12volatileLoadFNbNiNfPhZh",
"8volatile12volatileLoadFNbNiNfPkZk",
"8volatile12volatileLoadFNbNiNfPmZm",
"8volatile12volatileLoadFNbNiNfPtZt",
// volatileStore
"8volatile13volatileStoreFNbNiNfPhhZv",
"8volatile13volatileStoreFNbNiNfPkkZv",
"8volatile13volatileStoreFNbNiNfPmmZv",
"8volatile13volatileStoreFNbNiNfPttZv",
];
__gshared immutable ubyte[70] core_ioptab =
[
OPcos,
OPcos,
OPcos,
OPsin,
OPsin,
OPsin,
OPabs,
OPabs,
OPabs,
OPrint,
OPrint,
OPrint,
OPsqrt,
OPsqrt,
OPsqrt,
OPyl2x,
OPyl2x,
OPyl2x,
OPscale,
OPscale,
OPscale,
OPrndtol,
OPrndtol,
OPrndtol,
OPyl2xp1,
OPyl2xp1,
OPyl2xp1,
OPprefetch,
OPvector,
OPvector,
OPvector,
OPvector,
OPvector,
OPvector,
OPvector,
OPvector,
OPvector,
OPind,
OPind,
OPind,
OPind,
OPeq,
OPeq,
OPeq,
OPeq,
OPbsf,
OPbsf,
OPbsr,
OPbsr,
OPbtc,
OPbtr,
OPbts,
OPinp,
OPinp,
OPinp,
OPoutp,
OPbswap,
OPoutp,
OPoutp,
OPpopcnt,
OPpopcnt,
OPpopcnt,
OPind,
OPind,
OPind,
OPind,
OPeq,
OPeq,
OPeq,
OPeq,
];
static assert(std_namearray.length == std_namearray64.length);
static assert(std_namearray.length == std_ioptab.length);
static assert(core_namearray.length == core_namearray64.length);
static assert(core_namearray.length == core_ioptab.length);
debug
{
for (size_t i = 0; i < std_namearray.length - 1; i++)
{
if (strcmp(std_namearray[i], std_namearray[i + 1]) >= 0)
{
printf("std_namearray[%ld] = '%s'\n", cast(long)i, std_namearray[i]);
assert(0);
}
}
for (size_t i = 0; i < std_namearray64.length - 1; i++)
{
if (strcmp(std_namearray64[i], std_namearray64[i + 1]) >= 0)
{
printf("std_namearray64[%ld] = '%s'\n", cast(long)i, std_namearray64[i]);
assert(0);
}
}
for (size_t i = 0; i < core_namearray.length - 1; i++)
{
//printf("test1 %s %s %d\n", core_namearray[i], core_namearray[i + 1], strcmp(core_namearray[i], core_namearray[i + 1]));
if (strcmp(core_namearray[i], core_namearray[i + 1]) >= 0)
{
printf("core_namearray[%ld] = '%s'\n", cast(long)i, core_namearray[i]);
assert(0);
}
}
for (size_t i = 0; i < core_namearray64.length - 1; i++)
{
if (strcmp(core_namearray64[i], core_namearray64[i + 1]) >= 0)
{
printf("core_namearray64[%ld] = '%s'\n", cast(long)i, core_namearray64[i]);
assert(0);
}
}
}
size_t length = strlen(name);
if (length > 10 &&
(name[7] == 'm' || name[7] == 'i') &&
!memcmp(name, "_D3std".ptr, 6))
{
int i = binary(name + 6,
cast(const(char)**)(global.params.is64bit ? std_namearray64.ptr : std_namearray.ptr),
cast(int)std_namearray.length);
return (i == -1) ? NotIntrinsic : std_ioptab[i];
}
if (length > 12 &&
(name[8] == 'm' || name[8] == 'b' || name[8] == 's' || name[8] == 'v') &&
!memcmp(name, "_D4core".ptr, 7))
{
int i = binary(name + 7,
cast(const(char)**)(global.params.is64bit ? core_namearray64.ptr : core_namearray.ptr),
cast(int)core_namearray.length);
if (i != -1)
{
int op = core_ioptab[i];
if (!global.params.is64bit &&
(op == OPbsf || op == OPbsr) &&
op == core_ioptab[i - 1])
{
// Don't recognize 64 bit bsf() / bsr() in 32 bit mode
op = NotIntrinsic;
}
return op;
}
if (global.params.is64bit &&
fd.toParent().isTemplateInstance() &&
fd.ident == Id.va_start)
{
OutBuffer buf;
mangleToBuffer(fd.getModule(), &buf);
const s = buf.peekString();
if (!strcmp(s, "4core4stdc6stdarg"))
{
return OPva_start;
}
}
return NotIntrinsic;
}
return NotIntrinsic;
}
/**************************************
* Given an expression e that is an array,
* determine and set the 'length' variable.
* Input:
* lengthVar Symbol of 'length' variable
* &e expression that is the array
* t1 Type of the array
* Output:
* e is rewritten to avoid side effects
* Returns:
* expression that initializes 'length'
*/
elem *resolveLengthVar(VarDeclaration lengthVar, elem **pe, Type t1)
{
//printf("resolveLengthVar()\n");
elem *einit = null;
if (lengthVar && !(lengthVar.storage_class & STC.const_))
{
elem *elength;
Symbol *slength;
if (t1.ty == Tsarray)
{
TypeSArray tsa = cast(TypeSArray)t1;
dinteger_t length = tsa.dim.toInteger();
elength = el_long(TYsize_t, length);
goto L3;
}
else if (t1.ty == Tarray)
{
elength = *pe;
*pe = el_same(&elength);
elength = el_una(global.params.is64bit ? OP128_64 : OP64_32, TYsize_t, elength);
L3:
slength = toSymbol(lengthVar);
//symbol_add(slength);
einit = el_bin(OPeq, TYsize_t, el_var(slength), elength);
}
}
return einit;
}
/*************************************
* for a nested function 'fd' return the type of the closure
* of an outer function or aggregate. If the function is a member function
* the 'this' type is expected to be stored in 'sthis.Sthis'.
* It is always returned if it is not a void pointer.
* buildClosure() must have been called on the outer function before.
*
* Params:
* sthis = the symbol of the current 'this' derived from fd.vthis
* fd = the nested function
*/
TYPE* getParentClosureType(Symbol* sthis, FuncDeclaration fd)
{
if (sthis)
{
// only replace void*
if (sthis.Stype.Tty != TYnptr || sthis.Stype.Tnext.Tty != TYvoid)
return sthis.Stype;
}
for (Dsymbol sym = fd.toParent2(); sym; sym = sym.toParent2())
{
if (auto fn = sym.isFuncDeclaration())
if (fn.csym && fn.csym.Sscope)
return fn.csym.Sscope.Stype;
if (sym.isAggregateDeclaration())
break;
}
return sthis ? sthis.Stype : Type_toCtype(Type.tvoidptr);
}
/**************************************
* Go through the variables in function fd that are
* to be allocated in a closure, and set the .offset fields
* for those variables to their positions relative to the start
* of the closure instance.
* Also turns off nrvo for closure variables.
* Params:
* fd = function
*/
void setClosureVarOffset(FuncDeclaration fd)
{
if (fd.needsClosure())
{
uint offset = target.ptrsize; // leave room for previous sthis
foreach (v; fd.closureVars)
{
/* Align and allocate space for v in the closure
* just like AggregateDeclaration.addField() does.
*/
uint memsize;
uint memalignsize;
structalign_t xalign;
if (v.storage_class & STC.lazy_)
{
/* Lazy variables are really delegates,
* so give same answers that TypeDelegate would
*/
memsize = target.ptrsize * 2;
memalignsize = memsize;
xalign = STRUCTALIGN_DEFAULT;
}
else if (v.storage_class & (STC.out_ | STC.ref_))
{
// reference parameters are just pointers
memsize = target.ptrsize;
memalignsize = memsize;
xalign = STRUCTALIGN_DEFAULT;
}
else
{
memsize = cast(uint)v.type.size();
memalignsize = v.type.alignsize();
xalign = v.alignment;
}
AggregateDeclaration.alignmember(xalign, memalignsize, &offset);
v.offset = offset;
//printf("closure var %s, offset = %d\n", v.toChars(), v.offset);
offset += memsize;
/* Can't do nrvo if the variable is put in a closure, since
* what the shidden points to may no longer exist.
*/
if (fd.nrvo_can && fd.nrvo_var == v)
{
fd.nrvo_can = false;
}
}
}
}
/*************************************
* Closures are implemented by taking the local variables that
* need to survive the scope of the function, and copying them
* into a gc allocated chuck of memory. That chunk, called the
* closure here, is inserted into the linked list of stack
* frames instead of the usual stack frame.
*
* buildClosure() inserts code just after the function prolog
* is complete. It allocates memory for the closure, allocates
* a local variable (sclosure) to point to it, inserts into it
* the link to the enclosing frame, and copies into it the parameters
* that are referred to in nested functions.
* In VarExp::toElem and SymOffExp::toElem, when referring to a
* variable that is in a closure, takes the offset from sclosure rather
* than from the frame pointer.
*
* getEthis() and NewExp::toElem need to use sclosure, if set, rather
* than the current frame pointer.
*/
void buildClosure(FuncDeclaration fd, IRState *irs)
{
//printf("buildClosure(fd = %s)\n", fd.toChars());
if (fd.needsClosure())
{
setClosureVarOffset(fd);
// Generate closure on the heap
// BUG: doesn't capture variadic arguments passed to this function
/* BUG: doesn't handle destructors for the local variables.
* The way to do it is to make the closure variables the fields
* of a class object:
* class Closure {
* vtbl[]
* monitor
* ptr to destructor
* sthis
* ... closure variables ...
* ~this() { call destructor }
* }
*/
//printf("FuncDeclaration.buildClosure() %s\n", fd.toChars());
/* Generate type name for closure struct */
const char *name1 = "CLOSURE.";
const char *name2 = fd.toPrettyChars();
size_t namesize = strlen(name1)+strlen(name2)+1;
char *closname = cast(char *) calloc(namesize, char.sizeof);
strcat(strcat(closname, name1), name2);
/* Build type for closure */
type *Closstru = type_struct_class(closname, target.ptrsize, 0, null, null, false, false, true, false);
free(closname);
auto chaintype = getParentClosureType(irs.sthis, fd);
symbol_struct_addField(Closstru.Ttag, "__chain", chaintype, 0);
Symbol *sclosure;
sclosure = symbol_name("__closptr", SCauto, type_pointer(Closstru));
sclosure.Sflags |= SFLtrue | SFLfree;
symbol_add(sclosure);
irs.sclosure = sclosure;
assert(fd.closureVars.dim);
assert(fd.closureVars[0].offset >= target.ptrsize);
foreach (v; fd.closureVars)
{
//printf("closure var %s\n", v.toChars());
// Hack for the case fail_compilation/fail10666.d,
// until proper issue 5730 fix will come.
bool isScopeDtorParam = v.edtor && (v.storage_class & STC.parameter);
if (v.needsScopeDtor() || isScopeDtorParam)
{
/* Because the value needs to survive the end of the scope!
*/
v.error("has scoped destruction, cannot build closure");
}
if (v.isargptr)
{
/* See https://issues.dlang.org/show_bug.cgi?id=2479
* This is actually a bug, but better to produce a nice
* message at compile time rather than memory corruption at runtime