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all.h
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all.h
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#include <assert.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAKESURE(what, x) typedef char make_sure_##what[(x)?1:-1]
#define die(...) die_(__FILE__, __VA_ARGS__)
int cprintf(int cond, char *s, ...);
#define assertf(cond, ...) assert(cond || cprintf( cond , __VA_ARGS__))
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned long long bits;
typedef struct BSet BSet;
typedef struct Ref Ref;
typedef struct Op Op;
typedef struct Ins Ins;
typedef struct Phi Phi;
typedef struct Blk Blk;
typedef struct Use Use;
typedef struct Alias Alias;
typedef struct Tmp Tmp;
typedef struct Con Con;
typedef struct Addr Mem;
typedef struct Fn Fn;
typedef struct Typ Typ;
typedef struct Field Field;
typedef struct Dat Dat;
typedef struct Lnk Lnk;
typedef struct Target Target;
typedef struct Topt Topt;
enum {
NString = 72,
NIns = 1 << 20,
NAlign = 3,
NField = 32,
NBit = CHAR_BIT * sizeof(bits),
};
struct Topt {
char name[8];
int *val;
};
struct Target {
char name[16];
int gpr0; /* first general purpose reg */
int ngpr;
int fpr0; /* first floating point reg */
int nfpr;
bits rglob; /* globally live regs (e.g., sp, fp) */
int nrglob;
int *rsave; /* caller-save */
int nrsave[2];
Topt *topts;
bits (*retregs)(Ref, int[2]);
bits (*argregs)(Ref, int[2]);
int (*memargs)(int);
void (*abi)(Fn *);
void (*isel)(Fn *);
void (*emitfn)(Fn *, FILE *);
void (*init)();
};
#define BIT(n) ((bits)1 << (n))
enum {
RXX = 0,
Tmp0 = NBit, /* first non-reg temporary */
};
struct BSet {
uint nt;
bits *t;
};
struct Ref {
uint type:3;
uint val:29;
uint lval:2;
};
enum {
RTmp,
RCon,
RType,
RSlot,
RCall,
RMem,
};
#define R (Ref){0, 0, 0}
#define TMP(x) (Ref){RTmp, x, 0}
#define CON(x) (Ref){RCon, x, 0}
#define CON_Z CON(0) /* reserved zero constant */
#define SLOT(x) (Ref){RSlot, (x)&0x1fffffff, 0}
#define FSLOT(x, y) (Ref){RSlot, (x)&0x1fffffff, (y)&3}
#define TYPE(x) (Ref){RType, x, 0}
#define CALL(x) (Ref){RCall, x, 0}
#define MEM(x) (Ref){RMem, x, 0}
static inline int req(Ref a, Ref b)
{
return a.type == b.type && a.val == b.val;
}
static inline int rtype(Ref r)
{
if (req(r, R))
return -1;
return r.type;
}
enum CmpI {
Cieq,
Cine,
Cisge,
Cisgt,
Cisle,
Cislt,
Ciuge,
Ciugt,
Ciule,
Ciult,
NCmpI,
};
enum CmpF {
Cfeq,
Cfge,
Cfgt,
Cfle,
Cflt,
Cfne,
Cfo,
Cfuo,
NCmpF,
NCmp = NCmpI + NCmpF,
};
enum O {
Oxxx,
#define O(op, x, y) O##op,
#include "ops.h"
NOp,
};
enum J {
Jxxx,
#define JMPS(X) \
X(ret0) X(retw) X(retl) X(rets) \
X(retd) X(retc) X(jmp) X(jnz) \
X(jfieq) X(jfine) X(jfisge) X(jfisgt) \
X(jfisle) X(jfislt) X(jfiuge) X(jfiugt) \
X(jfiule) X(jfiult) X(jffeq) X(jffge) \
X(jffgt) X(jffle) X(jfflt) X(jffne) \
X(jffo) X(jffuo)
#define X(j) J##j,
JMPS(X)
#undef X
NJmp
};
enum {
Ocmpw = Oceqw,
Ocmpw1 = Ocultw,
Ocmpl = Oceql,
Ocmpl1 = Ocultl,
Ocmps = Oceqs,
Ocmps1 = Ocuos,
Ocmpd = Oceqd,
Ocmpd1 = Ocuod,
Oalloc = Oalloc4,
Oalloc1 = Oalloc16,
Oflag = Oflagieq,
Oflag1 = Oflagfuo,
NPubOp = Onop,
Jjf = Jjfieq,
Jjf1 = Jjffuo,
};
#define INRANGE(x, l, u) ((unsigned)(x) - l <= u - l) /* linear in x */
#define isstore(o) INRANGE(o, Ostoreb, Ostored)
#define isload(o) INRANGE(o, Oloadsb, Oload)
#define isext(o) INRANGE(o, Oextsb, Oextuw)
#define ispar(o) INRANGE(o, Opar, Opare)
#define isarg(o) INRANGE(o, Oarg, Oargv)
#define isret(j) INRANGE(j, Jret0, Jretc)
enum {
Kx = -1, /* "top" class (see usecheck() and clsmerge()) */
Kw,
Kl,
Ks,
Kd
};
#define KWIDE(k) ((k)&1)
#define KBASE(k) ((k)>>1)
struct Op {
char *name;
short argcls[2][4];
int canfold;
};
struct Ins {
uint op:30;
uint cls:2;
Ref to;
Ref arg[2];
};
struct Phi {
Ref to;
Ref *arg;
Blk **blk;
uint narg;
int cls;
Phi *link;
};
struct Blk {
Phi *phi;
Ins *ins;
uint nins;
struct {
short type;
Ref arg;
} jmp;
Blk *s1;
Blk *s2;
Blk *link;
uint id;
uint visit;
Blk *idom;
Blk *dom, *dlink;
Blk **fron;
uint nfron;
Blk **pred;
uint npred;
BSet in[1], out[1], gen[1];
int nlive[2];
int loop;
char name[NString];
};
struct Use {
enum {
UXXX,
UPhi,
UIns,
UJmp,
} type;
uint bid;
union {
Ins *ins;
Phi *phi;
} u;
};
enum {
NoAlias,
MayAlias,
MustAlias
};
struct Alias {
enum {
ABot = 0,
ALoc = 1, /* stack local */
ACon = 2,
AEsc = 3, /* stack escaping */
ASym = 4,
AUnk = 6,
#define astack(t) ((t) & 1)
} type;
Ref base;
uint32_t label;
int64_t offset;
Alias *slot;
};
struct Tmp {
char name[NString];
Use *use;
uint ndef, nuse;
uint bid; /* id of a defining block */
uint cost;
int slot; /* -1 for unset */
short cls;
struct {
int r; /* register or -1 */
int w; /* weight */
bits m; /* avoid these registers */
} hint;
int phi;
Alias alias;
enum {
WFull,
Wsb, /* must match Oload/Oext order */
Wub,
Wsh,
Wuh,
Wsw,
Wuw
} width;
int visit;
};
struct Con {
enum {
CUndef,
CBits,
CAddr,
} type;
uint32_t label;
union {
int64_t i;
double d;
float s;
} bits;
char flt; /* 1 to print as s, 2 to print as d */
char local;
};
typedef struct Addr Addr;
struct Addr { /* amd64 addressing */
Con offset;
Ref base;
Ref index;
int scale;
};
struct Lnk {
char export;
char align;
char *sec;
char *secf;
};
struct Fn {
Blk *start;
Tmp *tmp;
Con *con;
Mem *mem;
int ntmp;
int ncon;
int nmem;
int ncalls;
uint nblk;
int retty; /* index in typ[], -1 if no aggregate return */
Ref retr;
Blk **rpo;
bits reg;
int slot;
char vararg;
char dynalloc;
char name[NString];
Lnk lnk;
};
struct Typ {
char name[NString];
char isdark;
char isunion;
int align;
uint64_t size;
uint nunion;
struct Field {
enum {
FEnd,
Fb,
Fh,
Fw,
Fl,
Fs,
Fd,
FPad,
FTyp,
} type;
uint len; /* or index in typ[] for FTyp */
} (*fields)[NField+1];
};
struct Dat {
enum {
DStart,
DEnd,
DB,
DH,
DW,
DL,
DZ
} type;
char *name;
Lnk *lnk;
union {
int64_t num;
double fltd;
float flts;
char *str;
struct {
char *name;
int64_t off;
} ref;
} u;
char isref;
char isstr;
char isdflt;
};
/* main.c */
extern Target T;
extern char debug['Z'+1];
/* util.c */
typedef enum {
Pheap, /* free() necessary */
Pfn, /* discarded after processing the function */
} Pool;
extern Typ *typ;
extern Ins insb[NIns], *curi;
uint32_t hash(char *);
void die_(char *, char *, ...) __attribute__((noreturn));
void *emalloc(size_t);
void *alloc(size_t);
void freeall(void);
void *vnew(ulong, size_t, Pool);
void vfree(void *);
void vgrow(void *, ulong);
uint32_t intern(char *);
char *str(uint32_t);
int argcls(Ins *, int);
int isreg(Ref);
int iscmp(int, int *, int *);
void emit(int, int, Ref, Ref, Ref);
void emiti(Ins);
void idup(Ins **, Ins *, ulong);
Ins *icpy(Ins *, Ins *, ulong);
int cmpop(int);
int cmpneg(int);
int clsmerge(short *, short);
int phicls(int, Tmp *);
Ref newtmp(char *, int, Fn *);
void chuse(Ref, int, Fn *);
Ref newcon(Con *, Fn *);
Ref getcon(int64_t, Fn *);
int addcon(Con *, Con *);
void blit(Ref, uint, Ref, uint, uint, Fn *);
void blit0(Ref, Ref, uint, Fn *);
void salloc(Ref, Ref, Fn *);
void dumpts(BSet *, Tmp *, FILE *);
void bsinit(BSet *, uint);
void bszero(BSet *);
uint bscount(BSet *);
void bsset(BSet *, uint);
void bsclr(BSet *, uint);
void bscopy(BSet *, BSet *);
void bsunion(BSet *, BSet *);
void bsinter(BSet *, BSet *);
void bsdiff(BSet *, BSet *);
int bsequal(BSet *, BSet *);
int bsiter(BSet *, int *);
static inline int
bshas(BSet *bs, uint elt)
{
assert(elt < bs->nt * NBit);
return (bs->t[elt/NBit] & BIT(elt%NBit)) != 0;
}
/* parse.c */
extern Op optab[NOp];
void parse(FILE *, char *, void (Dat *), void (Fn *));
void printfn(Fn *, FILE *);
void printref(Ref, Fn *, FILE *);
void err(char *, ...) __attribute__((noreturn));
/* cfg.c */
Blk *blknew(void);
void edgedel(Blk *, Blk **);
void fillpreds(Fn *);
void fillrpo(Fn *);
void filldom(Fn *);
int sdom(Blk *, Blk *);
int dom(Blk *, Blk *);
void fillfron(Fn *);
void loopiter(Fn *, void (*)(Blk *, Blk *));
void fillloop(Fn *);
void simpljmp(Fn *);
/* mem.c */
void memopt(Fn *);
/* alias.c */
void fillalias(Fn *);
int alias(Ref, int, Ref, int, int *, Fn *);
int escapes(Ref, Fn *);
/* load.c */
int loadsz(Ins *);
int storesz(Ins *);
void loadopt(Fn *);
/* ssa.c */
void filluse(Fn *);
void fillpreds(Fn *);
void fillrpo(Fn *);
void ssa(Fn *);
void ssacheck(Fn *);
/* copy.c */
void copy(Fn *);
/* fold.c */
void fold(Fn *);
/* live.c */
void liveon(BSet *, Blk *, Blk *);
void filllive(Fn *);
/* spill.c */
void fillcost(Fn *);
void spill(Fn *);
/* rega.c */
void rega(Fn *);
/* gas.c */
enum Asm {
Gasmacho,
Gaself,
};
extern char *gasloc;
extern char *gassym;
void gasinit(enum Asm);
void gasemitlnk(char *, Lnk *, char *, FILE *);
void gasemitfntail(Fn *, FILE *);
void gasemitdat(Dat *, FILE *);
int gasstash(void *, int);
void gasemitfin(FILE *);