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backend.d
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backend.d
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2015 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
module ddmd.backend;
import ddmd.aggregate;
import ddmd.dmodule;
import ddmd.dscope;
import ddmd.expression;
import ddmd.lib;
import ddmd.mtype;
import ddmd.root.file;
struct Symbol;
struct code;
struct block;
struct Blockx;
struct elem;
extern extern (C++) void backend_init();
extern extern (C++) void backend_term();
extern extern (C++) void obj_start(char* srcfile);
extern extern (C++) void obj_end(Library library, File* objfile);
extern extern (C++) void obj_write_deferred(Library library);
extern extern (C++) void genObjFile(Module m, bool multiobj);
extern extern (C++) Symbol* toInitializer(AggregateDeclaration sd);
extern extern (C++) Symbol* toModuleArray(Module m);
extern extern (C++) Symbol* toModuleAssert(Module m);
extern extern (C++) Symbol* toModuleUnittest(Module m);
// type.h
alias tym_t = uint;
alias mangle_t = ubyte;
alias targ_size_t = ulong;
struct PARAM;
struct Classsym;
struct LIST;
alias list_t = LIST*;
alias type = TYPE;
extern extern (C++) type* type_fake(tym_t);
extern extern (C++) uint totym(Type tx);
extern extern (C++) void type_incCount(type* t);
extern extern (C++) void type_setIdent(type* t, char* ident);
extern extern (C++) type* type_alloc(tym_t);
extern extern (C++) type* type_allocn(tym_t, type* tn);
extern extern (C++) type* type_pointer(type* tnext);
extern extern (C++) type* type_dyn_array(type* tnext);
extern extern (C) type* type_static_array(targ_size_t dim, type* tnext);
extern extern (C++) type* type_assoc_array(type* tkey, type* tvalue);
extern extern (C++) type* type_delegate(type* tnext);
extern extern (C) type* type_function(tym_t tyf, type** ptypes, size_t nparams, bool variadic, type* tret);
extern extern (C++) type* type_enum(const(char)* name, type* tbase);
extern extern (C++) type* type_struct_class(const(char)* name, uint alignsize, uint structsize,
type* arg1type, type* arg2type, bool isUnion, bool isClass, bool isPOD);
extern extern (C++) void symbol_struct_addField(Symbol* s, const(char)* name, type* t, uint offset);
enum mTYbasic = 0xFF; /* bit mask for basic types */
enum mTYconst = 0x100;
enum mTYimmutable = 0x00080000; // immutable data
enum mTYshared = 0x00100000; // shared data
tym_t tybasic(tym_t ty) { return ty & mTYbasic; }
// Return true if type is a struct, class or union
bool type_struct(type* t) { return tybasic(t.Tty) == TYstruct; }
struct TYPE
{
debug ushort id;
tym_t Tty; /* mask (TYxxx) */
ushort Tflags; // TFxxxxx
mangle_t Tmangle; // name mangling
uint Tcount; // # pointing to this type
TYPE* Tnext; // next in list
// TYenum: gives base type
union
{
targ_size_t Tdim; // TYarray: # of elements in array
elem* Tel; // TFvla: gives dimension (NULL if '*')
PARAM* Tparamtypes; // TYfunc, TYtemplate: types of function parameters
Classsym* Ttag; // TYstruct,TYmemptr: tag symbol
// TYenum,TYvtshape: tag symbol
char* Tident; // TYident: identifier
TYPE* Tkey; // typtr: key type for associative arrays
}
list_t Texcspec; // tyfunc(): list of types of exception specification
}
enum
{
TYbool = 0,
TYchar = 1,
TYschar = 2, // signed char
TYuchar = 3, // unsigned char
TYchar8 = 4,
TYchar16 = 5,
TYshort = 6,
TYwchar_t = 7,
TYushort = 8, // unsigned short
TYenum = 9, // enumeration value
TYint = 0xA,
TYuint = 0xB, // unsigned
TYlong = 0xC,
TYulong = 0xD, // unsigned long
TYdchar = 0xE, // 32 bit Unicode char
TYllong = 0xF, // 64 bit long
TYullong = 0x10, // 64 bit unsigned long
TYfloat = 0x11, // 32 bit real
TYdouble = 0x12, // 64 bit real
// long double is mapped to either of the following at runtime:
TYdouble_alias = 0x13, // 64 bit real (but distinct for overload purposes)
TYldouble = 0x14, // 80 bit real
// Add imaginary and complex types for D and C99
TYifloat = 0x15,
TYidouble = 0x16,
TYildouble = 0x17,
TYcfloat = 0x18,
TYcdouble = 0x19,
TYcldouble = 0x1A,
TYnullptr = 0x1C,
TYnptr = 0x1D, // data segment relative pointer
TYref = 0x24, // reference to another type
TYvoid = 0x25,
TYstruct = 0x26, // watch tyaggregate()
TYarray = 0x27, // watch tyaggregate()
TYnfunc = 0x28, // near C func
TYnpfunc = 0x2A, // near Cpp func
TYnsfunc = 0x2C, // near stdcall func
TYifunc = 0x2E, // interrupt func
TYptr = 0x33, // generic pointer type
TYmfunc = 0x37, // NT C++ member func
TYjfunc = 0x38, // LINKd D function
TYhfunc = 0x39, // C function with hidden parameter
TYnref = 0x3A, // near reference
TYcent = 0x3C, // 128 bit signed integer
TYucent = 0x3D, // 128 bit unsigned integer
// SIMD vector types // D type
TYfloat4 = 0x3E, // float[4]
TYdouble2 = 0x3F, // double[2]
TYschar16 = 0x40, // byte[16]
TYuchar16 = 0x41, // ubyte[16]
TYshort8 = 0x42, // short[8]
TYushort8 = 0x43, // ushort[8]
TYlong4 = 0x44, // int[4]
TYulong4 = 0x45, // uint[4]
TYllong2 = 0x46, // long[2]
TYullong2 = 0x47, // ulong[2]
// // MARS types
// #define TYaarray TYnptr
// #define TYdelegate (I64 ? TYcent : TYllong)
// #define TYdarray (I64 ? TYucent : TYullong)
TYMAX = 0x48,
}