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glue.d
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glue.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/glue.d, _glue.d)
* Documentation: $(LINK https://dlang.org/phobos/dmd_glue.html)
* Coverage: $(LINK https://codecov.io/gh/dlang/dmd/src/master/src/dmd/glue.d)
*/
module dmd.glue;
import core.stdc.stdio;
import core.stdc.string;
import core.stdc.stdlib;
import dmd.root.array;
import dmd.root.file;
import dmd.root.filename;
import dmd.root.outbuffer;
import dmd.root.rmem;
import dmd.backend.cdef;
import dmd.backend.cc;
import dmd.backend.code;
import dmd.backend.dt;
import dmd.backend.el;
import dmd.backend.global;
import dmd.backend.obj;
import dmd.backend.oper;
import dmd.backend.outbuf;
import dmd.backend.rtlsym;
import dmd.backend.ty;
import dmd.backend.type;
import dmd.aggregate;
import dmd.arraytypes;
import dmd.blockexit;
import dmd.dclass;
import dmd.declaration;
import dmd.dmangle;
import dmd.dmodule;
import dmd.dstruct;
import dmd.dsymbol;
import dmd.dtemplate;
import dmd.e2ir;
import dmd.errors;
import dmd.expression;
import dmd.func;
import dmd.globals;
import dmd.identifier;
import dmd.id;
import dmd.irstate;
import dmd.lib;
import dmd.mtype;
import dmd.objc_glue;
import dmd.s2ir;
import dmd.statement;
import dmd.target;
import dmd.tocsym;
import dmd.toctype;
import dmd.toir;
import dmd.toobj;
import dmd.typesem;
import dmd.utils;
extern (C++):
alias symbols = Array!(Symbol*);
alias toSymbol = dmd.tocsym.toSymbol;
//extern
__gshared
{
elem *eictor;
Symbol *ictorlocalgot;
symbols sctors;
StaticDtorDeclarations ectorgates;
symbols sdtors;
symbols stests;
symbols ssharedctors;
SharedStaticDtorDeclarations esharedctorgates;
symbols sshareddtors;
const(char)* lastmname;
}
/**************************************
* Append s to list of object files to generate later.
*/
__gshared Dsymbols obj_symbols_towrite;
void obj_append(Dsymbol s)
{
//printf("deferred: %s\n", s.toChars());
obj_symbols_towrite.push(s);
}
void obj_write_deferred(Library library)
{
for (size_t i = 0; i < obj_symbols_towrite.dim; i++)
{
Dsymbol s = obj_symbols_towrite[i];
Module m = s.getModule();
const(char)* mname;
if (m)
{
mname = m.srcfile.toChars();
lastmname = mname;
}
else
{
//mname = s.ident.toChars();
mname = lastmname;
assert(mname);
}
obj_start(mname);
__gshared int count;
count++; // sequence for generating names
/* Create a module that's a doppelganger of m, with just
* enough to be able to create the moduleinfo.
*/
OutBuffer idbuf;
idbuf.printf("%s.%d", m ? m.ident.toChars() : mname, count);
char *idstr = idbuf.peekString();
if (!m)
{
// it doesn't make sense to make up a module if we don't know where to put the symbol
// so output it into it's own object file without ModuleInfo
objmod.initfile(idstr, null, mname);
toObjFile(s, false);
objmod.termfile();
}
else
{
idbuf.data = null;
Identifier id = Identifier.create(idstr);
Module md = Module.create(mname, id, 0, 0);
md.members = new Dsymbols();
md.members.push(s); // its only 'member' is s
md.doppelganger = 1; // identify this module as doppelganger
md.md = m.md;
md.aimports.push(m); // it only 'imports' m
genObjFile(md, false);
}
/* Set object file name to be source name with sequence number,
* as mangled symbol names get way too long.
*/
const(char)* fname = FileName.removeExt(mname);
OutBuffer namebuf;
uint hash = 0;
for (const(char)* p = s.toChars(); *p; p++)
hash += *p;
namebuf.printf("%s_%x_%x.%s", fname, count, hash, global.obj_ext);
FileName.free(cast(char *)fname);
fname = namebuf.extractString();
//printf("writing '%s'\n", fname);
File *objfile = File.create(fname);
obj_end(library, objfile);
}
obj_symbols_towrite.dim = 0;
}
/***********************************************
* Generate function that calls array of functions and gates.
* Params:
* m = module symbol (for name mangling purposes)
* sctors = array of functions
* ectorgates = array of gates
* id = identifier string for generator function
* Returns:
* function Symbol generated
*/
private Symbol *callFuncsAndGates(Module m, symbols *sctors, StaticDtorDeclarations *ectorgates,
const(char)* id)
{
Symbol *sctor = null;
if ((sctors && sctors.dim) ||
(ectorgates && ectorgates.dim))
{
__gshared type *t;
if (!t)
{
/* t will be the type of the functions generated:
* extern (C) void func();
*/
t = type_function(TYnfunc, null, 0, false, tstypes[TYvoid]);
t.Tmangle = mTYman_c;
}
localgot = null;
sctor = toSymbolX(m, id, SCglobal, t, "FZv");
cstate.CSpsymtab = &sctor.Sfunc.Flocsym;
elem *ector = null;
if (ectorgates)
{
foreach (f; *ectorgates)
{
Symbol *s = toSymbol(f.vgate);
elem *e = el_var(s);
e = el_bin(OPaddass, TYint, e, el_long(TYint, 1));
ector = el_combine(ector, e);
}
}
if (sctors)
{
foreach (s; *sctors)
{
elem *e = el_una(OPucall, TYvoid, el_var(s));
ector = el_combine(ector, e);
}
}
block *b = block_calloc();
b.BC = BCret;
b.Belem = ector;
sctor.Sfunc.Fstartline.Sfilename = m.arg;
sctor.Sfunc.Fstartblock = b;
writefunc(sctor);
}
return sctor;
}
/**************************************
* Prepare for generating obj file.
*/
__gshared Outbuffer objbuf;
void obj_start(const(char)* srcfile)
{
//printf("obj_start()\n");
rtlsym_reset();
clearStringTab();
version (Windows)
{
// Produce Ms COFF files for 64 bit code, OMF for 32 bit code
assert(objbuf.size() == 0);
objmod = global.params.mscoff ? MsCoffObj_init(&objbuf, srcfile, null)
: OmfObj_init(&objbuf, srcfile, null);
}
else
{
objmod = Obj.init(&objbuf, srcfile, null);
}
el_reset();
cg87_reset();
out_reset();
}
void obj_end(Library library, File *objfile)
{
const(char)* objfilename = objfile.name.toChars();
objmod.term(objfilename);
//delete objmod;
objmod = null;
if (library)
{
// Transfer image to library
library.addObject(objfilename, objbuf.buf[0 .. objbuf.p - objbuf.buf]);
objbuf.buf = null;
}
else
{
// Transfer image to file
objfile.setbuffer(objbuf.buf, objbuf.p - objbuf.buf);
objbuf.buf = null;
ensurePathToNameExists(Loc.initial, objfilename);
//printf("write obj %s\n", objfilename);
writeFile(Loc.initial, objfile);
}
objbuf.pend = null;
objbuf.p = null;
}
bool obj_includelib(const(char)* name)
{
return objmod.includelib(name);
}
void obj_startaddress(Symbol *s)
{
return objmod.startaddress(s);
}
bool obj_linkerdirective(const(char)* directive)
{
return objmod.linkerdirective(directive);
}
/**************************************
* Generate .obj file for Module.
*/
void genObjFile(Module m, bool multiobj)
{
//EEcontext *ee = env.getEEcontext();
//printf("Module.genobjfile(multiobj = %d) %s\n", multiobj, m.toChars());
if (m.ident == Id.entrypoint)
{
bool v = global.params.verbose;
global.params.verbose = false;
foreach (member; *m.members)
{
//printf("toObjFile %s %s\n", member.kind(), member.toChars());
toObjFile(member, global.params.multiobj);
}
global.params.verbose = v;
return;
}
lastmname = m.srcfile.toChars();
objmod.initfile(lastmname, null, m.toPrettyChars());
eictor = null;
ictorlocalgot = null;
sctors.setDim(0);
ectorgates.setDim(0);
sdtors.setDim(0);
ssharedctors.setDim(0);
esharedctorgates.setDim(0);
sshareddtors.setDim(0);
stests.setDim(0);
if (m.doppelganger)
{
/* Generate a reference to the moduleinfo, so the module constructors
* and destructors get linked in.
*/
Module mod = m.aimports[0];
assert(mod);
if (mod.sictor || mod.sctor || mod.sdtor || mod.ssharedctor || mod.sshareddtor)
{
Symbol *s = toSymbol(mod);
//objextern(s);
//if (!s.Sxtrnnum) objextdef(s.Sident);
if (!s.Sxtrnnum)
{
//printf("%s\n", s.Sident);
//#if 0 /* This should work, but causes optlink to fail in common/newlib.asm */
// objextdef(s.Sident);
//#else
Symbol *sref = symbol_generate(SCstatic, type_fake(TYnptr));
sref.Sfl = FLdata;
auto dtb = DtBuilder(0);
dtb.xoff(s, 0, TYnptr);
sref.Sdt = dtb.finish();
outdata(sref);
//#endif
}
}
}
if (global.params.cov)
{
/* Create coverage identifier:
* uint[numlines] __coverage;
*/
m.cov = toSymbolX(m, "__coverage", SCstatic, type_fake(TYint), "Z");
m.cov.Sflags |= SFLhidden;
m.cov.Stype.Tmangle = mTYman_d;
m.cov.Sfl = FLdata;
auto dtb = DtBuilder(0);
dtb.nzeros(4 * m.numlines);
m.cov.Sdt = dtb.finish();
outdata(m.cov);
m.covb = cast(uint *)calloc((m.numlines + 32) / 32, (*m.covb).sizeof);
}
for (int i = 0; i < m.members.dim; i++)
{
auto member = (*m.members)[i];
//printf("toObjFile %s %s\n", member.kind(), member.toChars());
toObjFile(member, multiobj);
}
if (global.params.cov)
{
/* Generate
* private bit[numlines] __bcoverage;
*/
Symbol *bcov = symbol_calloc("__bcoverage");
bcov.Stype = type_fake(TYuint);
bcov.Stype.Tcount++;
bcov.Sclass = SCstatic;
bcov.Sfl = FLdata;
auto dtb = DtBuilder(0);
dtb.nbytes((m.numlines + 32) / 32 * (*m.covb).sizeof, cast(char *)m.covb);
bcov.Sdt = dtb.finish();
outdata(bcov);
free(m.covb);
m.covb = null;
/* Generate:
* _d_cover_register(uint[] __coverage, BitArray __bcoverage, string filename);
* and prepend it to the static constructor.
*/
/* t will be the type of the functions generated:
* extern (C) void func();
*/
type *t = type_function(TYnfunc, null, 0, false, tstypes[TYvoid]);
t.Tmangle = mTYman_c;
m.sictor = toSymbolX(m, "__modictor", SCglobal, t, "FZv");
cstate.CSpsymtab = &m.sictor.Sfunc.Flocsym;
localgot = ictorlocalgot;
elem *ecov = el_pair(TYdarray, el_long(TYsize_t, m.numlines), el_ptr(m.cov));
elem *ebcov = el_pair(TYdarray, el_long(TYsize_t, m.numlines), el_ptr(bcov));
if (config.exe == EX_WIN64)
{
ecov = addressElem(ecov, Type.tvoid.arrayOf(), false);
ebcov = addressElem(ebcov, Type.tvoid.arrayOf(), false);
}
elem *efilename = toEfilename(m);
if (config.exe == EX_WIN64)
efilename = addressElem(efilename, Type.tstring, true);
elem *e = el_params(
el_long(TYuchar, global.params.covPercent),
ecov,
ebcov,
efilename,
null);
e = el_bin(OPcall, TYvoid, el_var(getRtlsym(RTLSYM_DCOVER2)), e);
eictor = el_combine(e, eictor);
ictorlocalgot = localgot;
}
// If coverage / static constructor / destructor / unittest calls
if (eictor || sctors.dim || ectorgates.dim || sdtors.dim ||
ssharedctors.dim || esharedctorgates.dim || sshareddtors.dim || stests.dim)
{
if (eictor)
{
localgot = ictorlocalgot;
block *b = block_calloc();
b.BC = BCret;
b.Belem = eictor;
m.sictor.Sfunc.Fstartline.Sfilename = m.arg;
m.sictor.Sfunc.Fstartblock = b;
writefunc(m.sictor);
}
m.sctor = callFuncsAndGates(m, &sctors, &ectorgates, "__modctor");
m.sdtor = callFuncsAndGates(m, &sdtors, null, "__moddtor");
m.ssharedctor = callFuncsAndGates(m, &ssharedctors, cast(StaticDtorDeclarations *)&esharedctorgates, "__modsharedctor");
m.sshareddtor = callFuncsAndGates(m, &sshareddtors, null, "__modshareddtor");
m.stest = callFuncsAndGates(m, &stests, null, "__modtest");
if (m.doppelganger)
genModuleInfo(m);
}
if (m.doppelganger)
{
objc.generateModuleInfo(m);
objmod.termfile();
return;
}
/* Generate module info for templates and -cov.
* Don't generate ModuleInfo if `object.ModuleInfo` is not declared or
* explicitly disabled through compiler switches such as `-betterC`.
*/
if (global.params.useModuleInfo && Module.moduleinfo /*|| needModuleInfo()*/)
genModuleInfo(m);
objmod.termfile();
}
/**************************************
* Search for a druntime array op
*/
bool isDruntimeArrayOp(Identifier ident)
{
/* Some of the array op functions are written as library functions,
* presumably to optimize them with special CPU vector instructions.
* List those library functions here, in alpha order.
*/
__gshared const(char)*[143] libArrayopFuncs =
[
"_arrayExpSliceAddass_a",
"_arrayExpSliceAddass_d",
"_arrayExpSliceAddass_f", // T[]+=T
"_arrayExpSliceAddass_g",
"_arrayExpSliceAddass_h",
"_arrayExpSliceAddass_i",
"_arrayExpSliceAddass_k",
"_arrayExpSliceAddass_s",
"_arrayExpSliceAddass_t",
"_arrayExpSliceAddass_u",
"_arrayExpSliceAddass_w",
"_arrayExpSliceDivass_d", // T[]/=T
"_arrayExpSliceDivass_f", // T[]/=T
"_arrayExpSliceMinSliceAssign_a",
"_arrayExpSliceMinSliceAssign_d", // T[]=T-T[]
"_arrayExpSliceMinSliceAssign_f", // T[]=T-T[]
"_arrayExpSliceMinSliceAssign_g",
"_arrayExpSliceMinSliceAssign_h",
"_arrayExpSliceMinSliceAssign_i",
"_arrayExpSliceMinSliceAssign_k",
"_arrayExpSliceMinSliceAssign_s",
"_arrayExpSliceMinSliceAssign_t",
"_arrayExpSliceMinSliceAssign_u",
"_arrayExpSliceMinSliceAssign_w",
"_arrayExpSliceMinass_a",
"_arrayExpSliceMinass_d", // T[]-=T
"_arrayExpSliceMinass_f", // T[]-=T
"_arrayExpSliceMinass_g",
"_arrayExpSliceMinass_h",
"_arrayExpSliceMinass_i",
"_arrayExpSliceMinass_k",
"_arrayExpSliceMinass_s",
"_arrayExpSliceMinass_t",
"_arrayExpSliceMinass_u",
"_arrayExpSliceMinass_w",
"_arrayExpSliceMulass_d", // T[]*=T
"_arrayExpSliceMulass_f", // T[]*=T
"_arrayExpSliceMulass_i",
"_arrayExpSliceMulass_k",
"_arrayExpSliceMulass_s",
"_arrayExpSliceMulass_t",
"_arrayExpSliceMulass_u",
"_arrayExpSliceMulass_w",
"_arraySliceExpAddSliceAssign_a",
"_arraySliceExpAddSliceAssign_d", // T[]=T[]+T
"_arraySliceExpAddSliceAssign_f", // T[]=T[]+T
"_arraySliceExpAddSliceAssign_g",
"_arraySliceExpAddSliceAssign_h",
"_arraySliceExpAddSliceAssign_i",
"_arraySliceExpAddSliceAssign_k",
"_arraySliceExpAddSliceAssign_s",
"_arraySliceExpAddSliceAssign_t",
"_arraySliceExpAddSliceAssign_u",
"_arraySliceExpAddSliceAssign_w",
"_arraySliceExpDivSliceAssign_d", // T[]=T[]/T
"_arraySliceExpDivSliceAssign_f", // T[]=T[]/T
"_arraySliceExpMinSliceAssign_a",
"_arraySliceExpMinSliceAssign_d", // T[]=T[]-T
"_arraySliceExpMinSliceAssign_f", // T[]=T[]-T
"_arraySliceExpMinSliceAssign_g",
"_arraySliceExpMinSliceAssign_h",
"_arraySliceExpMinSliceAssign_i",
"_arraySliceExpMinSliceAssign_k",
"_arraySliceExpMinSliceAssign_s",
"_arraySliceExpMinSliceAssign_t",
"_arraySliceExpMinSliceAssign_u",
"_arraySliceExpMinSliceAssign_w",
"_arraySliceExpMulSliceAddass_d", // T[] += T[]*T
"_arraySliceExpMulSliceAddass_f",
"_arraySliceExpMulSliceAddass_r",
"_arraySliceExpMulSliceAssign_d", // T[]=T[]*T
"_arraySliceExpMulSliceAssign_f", // T[]=T[]*T
"_arraySliceExpMulSliceAssign_i",
"_arraySliceExpMulSliceAssign_k",
"_arraySliceExpMulSliceAssign_s",
"_arraySliceExpMulSliceAssign_t",
"_arraySliceExpMulSliceAssign_u",
"_arraySliceExpMulSliceAssign_w",
"_arraySliceExpMulSliceMinass_d", // T[] -= T[]*T
"_arraySliceExpMulSliceMinass_f",
"_arraySliceExpMulSliceMinass_r",
"_arraySliceSliceAddSliceAssign_a",
"_arraySliceSliceAddSliceAssign_d", // T[]=T[]+T[]
"_arraySliceSliceAddSliceAssign_f", // T[]=T[]+T[]
"_arraySliceSliceAddSliceAssign_g",
"_arraySliceSliceAddSliceAssign_h",
"_arraySliceSliceAddSliceAssign_i",
"_arraySliceSliceAddSliceAssign_k",
"_arraySliceSliceAddSliceAssign_r", // T[]=T[]+T[]
"_arraySliceSliceAddSliceAssign_s",
"_arraySliceSliceAddSliceAssign_t",
"_arraySliceSliceAddSliceAssign_u",
"_arraySliceSliceAddSliceAssign_w",
"_arraySliceSliceAddass_a",
"_arraySliceSliceAddass_d", // T[]+=T[]
"_arraySliceSliceAddass_f", // T[]+=T[]
"_arraySliceSliceAddass_g",
"_arraySliceSliceAddass_h",
"_arraySliceSliceAddass_i",
"_arraySliceSliceAddass_k",
"_arraySliceSliceAddass_s",
"_arraySliceSliceAddass_t",
"_arraySliceSliceAddass_u",
"_arraySliceSliceAddass_w",
"_arraySliceSliceMinSliceAssign_a",
"_arraySliceSliceMinSliceAssign_d", // T[]=T[]-T[]
"_arraySliceSliceMinSliceAssign_f", // T[]=T[]-T[]
"_arraySliceSliceMinSliceAssign_g",
"_arraySliceSliceMinSliceAssign_h",
"_arraySliceSliceMinSliceAssign_i",
"_arraySliceSliceMinSliceAssign_k",
"_arraySliceSliceMinSliceAssign_r", // T[]=T[]-T[]
"_arraySliceSliceMinSliceAssign_s",
"_arraySliceSliceMinSliceAssign_t",
"_arraySliceSliceMinSliceAssign_u",
"_arraySliceSliceMinSliceAssign_w",
"_arraySliceSliceMinass_a",
"_arraySliceSliceMinass_d", // T[]-=T[]
"_arraySliceSliceMinass_f", // T[]-=T[]
"_arraySliceSliceMinass_g",
"_arraySliceSliceMinass_h",
"_arraySliceSliceMinass_i",
"_arraySliceSliceMinass_k",
"_arraySliceSliceMinass_s",
"_arraySliceSliceMinass_t",
"_arraySliceSliceMinass_u",
"_arraySliceSliceMinass_w",
"_arraySliceSliceMulSliceAssign_d", // T[]=T[]*T[]
"_arraySliceSliceMulSliceAssign_f", // T[]=T[]*T[]
"_arraySliceSliceMulSliceAssign_i",
"_arraySliceSliceMulSliceAssign_k",
"_arraySliceSliceMulSliceAssign_s",
"_arraySliceSliceMulSliceAssign_t",
"_arraySliceSliceMulSliceAssign_u",
"_arraySliceSliceMulSliceAssign_w",
"_arraySliceSliceMulass_d", // T[]*=T[]
"_arraySliceSliceMulass_f", // T[]*=T[]
"_arraySliceSliceMulass_i",
"_arraySliceSliceMulass_k",
"_arraySliceSliceMulass_s",
"_arraySliceSliceMulass_t",
"_arraySliceSliceMulass_u",
"_arraySliceSliceMulass_w",
];
const(char)* name = ident.toChars();
int i = binary(name, libArrayopFuncs.ptr, libArrayopFuncs.length);
if (i != -1)
return true;
debug // Make sure our array is alphabetized
{
foreach (s; libArrayopFuncs)
{
if (strcmp(name, s) == 0)
assert(0);
}
}
return false;
}
/* ================================================================== */
UnitTestDeclaration needsDeferredNested(FuncDeclaration fd)
{
while (fd && fd.isNested())
{
FuncDeclaration fdp = fd.toParent2().isFuncDeclaration();
if (!fdp)
break;
if (UnitTestDeclaration udp = fdp.isUnitTestDeclaration())
return udp.semanticRun < PASS.obj ? udp : null;
fd = fdp;
}
return null;
}
void FuncDeclaration_toObjFile(FuncDeclaration fd, bool multiobj)
{
ClassDeclaration cd = fd.parent.isClassDeclaration();
//printf("FuncDeclaration.toObjFile(%p, %s.%s)\n", fd, fd.parent.toChars(), fd.toChars());
//if (type) printf("type = %s\n", type.toChars());
version (none)
{
//printf("line = %d\n", getWhere() / LINEINC);
EEcontext *ee = env.getEEcontext();
if (ee.EEcompile == 2)
{
if (ee.EElinnum < (getWhere() / LINEINC) ||
ee.EElinnum > (endwhere / LINEINC)
)
return; // don't compile this function
ee.EEfunc = toSymbol(this);
}
}
if (fd.semanticRun >= PASS.obj) // if toObjFile() already run
return;
if (fd.type && fd.type.ty == Tfunction && (cast(TypeFunction)fd.type).next is null)
return;
// If errors occurred compiling it, such as https://issues.dlang.org/show_bug.cgi?id=6118
if (fd.type && fd.type.ty == Tfunction && (cast(TypeFunction)fd.type).next.ty == Terror)
return;
if (fd.semantic3Errors)
return;
if (global.errors)
return;
if (!fd.fbody)
return;
UnitTestDeclaration ud = fd.isUnitTestDeclaration();
if (ud && !global.params.useUnitTests)
return;
if (multiobj && !fd.isStaticDtorDeclaration() && !fd.isStaticCtorDeclaration() && !fd.isCrtCtorDtor)
{
obj_append(fd);
return;
}
if (fd.semanticRun == PASS.semanticdone)
{
/* What happened is this function failed semantic3() with errors,
* but the errors were gagged.
* Try to reproduce those errors, and then fail.
*/
fd.error("errors compiling the function");
return;
}
assert(fd.semanticRun == PASS.semantic3done);
assert(fd.ident != Id.empty);
for (FuncDeclaration fd2 = fd; fd2; )
{
if (fd2.inNonRoot())
return;
if (fd2.isNested())
fd2 = fd2.toParent2().isFuncDeclaration();
else
break;
}
if (UnitTestDeclaration udp = needsDeferredNested(fd))
{
/* Can't do unittest's out of order, they are order dependent in that their
* execution is done in lexical order.
*/
udp.deferredNested.push(fd);
//printf("%s @[%s]\n\t-. pushed to unittest @[%s]\n",
// fd.toPrettyChars(), fd.loc.toChars(), udp.loc.toChars());
return;
}
if (fd.isArrayOp && isDruntimeArrayOp(fd.ident))
{
// Implementation is in druntime
return;
}
// start code generation
fd.semanticRun = PASS.obj;
if (global.params.verbose)
message("function %s", fd.toPrettyChars());
Symbol *s = toSymbol(fd);
func_t *f = s.Sfunc;
// tunnel type of "this" to debug info generation
if (AggregateDeclaration ad = fd.parent.isAggregateDeclaration())
{
.type* t = Type_toCtype(ad.getType());
if (cd)
t = t.Tnext; // skip reference
f.Fclass = cast(Classsym *)t;
}
/* This is done so that the 'this' pointer on the stack is the same
* distance away from the function parameters, so that an overriding
* function can call the nested fdensure or fdrequire of its overridden function
* and the stack offsets are the same.
*/
if (fd.isVirtual() && (fd.fensure || fd.frequire))
f.Fflags3 |= Ffakeeh;
if (fd.eh_none)
// Same as config.ehmethod==EH_NONE, but only for this function
f.Fflags3 |= Feh_none;
s.Sclass = global.params.isOSX ? SCcomdat : SCglobal;
for (Dsymbol p = fd.parent; p; p = p.parent)
{
if (p.isTemplateInstance())
{
s.Sclass = SCcomdat;
break;
}
}
/* Vector operations should be comdat's
*/
if (fd.isArrayOp)
s.Sclass = SCcomdat;
if (fd.inlinedNestedCallees)
{
/* https://issues.dlang.org/show_bug.cgi?id=15333
* If fd contains inlined expressions that come from
* nested function bodies, the enclosing of the functions must be
* generated first, in order to calculate correct frame pointer offset.
*/
foreach (fdc; *fd.inlinedNestedCallees)
{
FuncDeclaration fp = fdc.toParent2().isFuncDeclaration();
if (fp && fp.semanticRun < PASS.obj)
{
toObjFile(fp, multiobj);
}
}
}
if (fd.isNested())
{
//if (!(config.flags3 & CFG3pic))
// s.Sclass = SCstatic;
f.Fflags3 |= Fnested;
/* The enclosing function must have its code generated first,
* in order to calculate correct frame pointer offset.
*/
FuncDeclaration fdp = fd.toParent2().isFuncDeclaration();
if (fdp && fdp.semanticRun < PASS.obj)
{
toObjFile(fdp, multiobj);
}
}
else
{
specialFunctions(objmod, fd);
}
symtab_t *symtabsave = cstate.CSpsymtab;
cstate.CSpsymtab = &f.Flocsym;
// Find module m for this function
Module m = null;
for (Dsymbol p = fd.parent; p; p = p.parent)
{
m = p.isModule();
if (m)
break;
}
Dsymbols deferToObj; // write these to OBJ file later
Array!(elem*) varsInScope;
Label*[void*] labels = null;
IRState irs = IRState(m, fd, &varsInScope, &deferToObj, &labels, &global.params);
Symbol *shidden = null;
Symbol *sthis = null;
tym_t tyf = tybasic(s.Stype.Tty);
//printf("linkage = %d, tyf = x%x\n", linkage, tyf);
int reverse = tyrevfunc(s.Stype.Tty);
assert(fd.type.ty == Tfunction);
TypeFunction tf = cast(TypeFunction)fd.type;
RET retmethod = retStyle(tf, fd.needThis());
if (retmethod == RET.stack)
{
// If function returns a struct, put a pointer to that
// as the first argument
.type *thidden = Type_toCtype(tf.next.pointerTo());
char[5+4+1] hiddenparam = void;
__gshared int hiddenparami; // how many we've generated so far
const(char)* name;
if (fd.nrvo_can && fd.nrvo_var)
name = fd.nrvo_var.ident.toChars();
else
{
sprintf(hiddenparam.ptr, "__HID%d", ++hiddenparami);
name = hiddenparam.ptr;
}
shidden = symbol_name(name, SCparameter, thidden);
shidden.Sflags |= SFLtrue | SFLfree;
if (fd.nrvo_can && fd.nrvo_var && fd.nrvo_var.nestedrefs.dim)
type_setcv(&shidden.Stype, shidden.Stype.Tty | mTYvolatile);
irs.shidden = shidden;
fd.shidden = shidden;
}
else
{
// Register return style cannot make nrvo.
// Auto functions keep the nrvo_can flag up to here,
// so we should eliminate it before entering backend.
fd.nrvo_can = 0;
}
if (fd.vthis)
{
assert(!fd.vthis.csym);
sthis = toSymbol(fd.vthis);
sthis.Stype = getParentClosureType(sthis, fd);
irs.sthis = sthis;
if (!(f.Fflags3 & Fnested))
f.Fflags3 |= Fmember;
}
// Estimate number of parameters, pi
size_t pi = (fd.v_arguments !is null);
if (fd.parameters)
pi += fd.parameters.dim;
if (fd.selector)
pi++; // Extra argument for Objective-C selector
// Create a temporary buffer, params[], to hold function parameters
Symbol*[10] paramsbuf = void;
Symbol **params = paramsbuf.ptr; // allocate on stack if possible
if (pi + 2 > paramsbuf.length) // allow extra 2 for sthis and shidden
{
params = cast(Symbol **)malloc((pi + 2) * (Symbol *).sizeof);
assert(params);
}
// Get the actual number of parameters, pi, and fill in the params[]
pi = 0;
if (fd.v_arguments)
{
params[pi] = toSymbol(fd.v_arguments);
pi += 1;
}
if (fd.parameters)
{
foreach (i, v; *fd.parameters)
{
//printf("param[%d] = %p, %s\n", i, v, v.toChars());
assert(!v.csym);
params[pi + i] = toSymbol(v);
}
pi += fd.parameters.dim;
}
if (reverse)
{
// Reverse params[] entries
foreach (i, sptmp; params[0 .. pi/2])
{
params[i] = params[pi - 1 - i];
params[pi - 1 - i] = sptmp;
}
}