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cmd/gc: prepare for 64-bit ints

Browse Source 
This CL makes the compiler understand that the type of
the len or cap of a map, slice, or string is 'int', not 'int32'.
It does not change the meaning of int, but it should make
the eventual change of the meaning of int in 6g a bit smoother.

Update #2188.

R=ken, dave, remyoudompheng
CC=golang-dev
https://golang.org/cl/6542059
This commit is contained in:
Russ Cox 2012-09-24 14:59:44 -04:00
parent 0bf46d0cf3
commit 650160e36a
16 changed files with 81 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/cmd/5g/galign.c
View File

@ -27,6 +27,7 @@ void
betypeinit(void)
{
widthptr = 4;
widthint = 4;
zprog.link = P;
zprog.as = AGOK;

32
src/cmd/6g/cgen.c
View File

@ -309,7 +309,7 @@ cgen(Node *n, Node *res)
case OLEN:
if(istype(nl->type, TMAP) || istype(nl->type, TCHAN)) {
// map and chan have len in the first 32-bit word.
// map and chan have len in the first int-sized word.
// a zero pointer means zero length
regalloc(&n1, types[tptr], res);
cgen(nl, &n1);
@ -320,7 +320,7 @@ cgen(Node *n, Node *res)
n2 = n1;
n2.op = OINDREG;
n2.type = types[TINT32];
n2.type = types[simtype[TINT]];
gmove(&n2, &n1);
patch(p1, pc);
@ -333,7 +333,7 @@ cgen(Node *n, Node *res)
// both slice and string have len one pointer into the struct.
// a zero pointer means zero length
igen(nl, &n1, res);
n1.type = types[TUINT32];
n1.type = types[simtype[TUINT]];
n1.xoffset += Array_nel;
gmove(&n1, res);
regfree(&n1);
@ -344,7 +344,7 @@ cgen(Node *n, Node *res)
case OCAP:
if(istype(nl->type, TCHAN)) {
// chan has cap in the second 32-bit word.
// chan has cap in the second int-sized word.
// a zero pointer means zero length
regalloc(&n1, types[tptr], res);
cgen(nl, &n1);
@ -355,8 +355,8 @@ cgen(Node *n, Node *res)
n2 = n1;
n2.op = OINDREG;
n2.xoffset = 4;
n2.type = types[TINT32];
n2.xoffset = widthint;
n2.type = types[simtype[TINT]];
gmove(&n2, &n1);
patch(p1, pc);
@ -367,7 +367,7 @@ cgen(Node *n, Node *res)
}
if(isslice(nl->type)) {
igen(nl, &n1, res);
n1.type = types[TUINT32];
n1.type = types[simtype[TUINT]];
n1.xoffset += Array_cap;
gmove(&n1, res);
regfree(&n1);
@ -596,7 +596,7 @@ agen(Node *n, Node *res)
nlen.type = types[tptr];
nlen.xoffset += Array_array;
gmove(&nlen, &n3);
nlen.type = types[TUINT32];
nlen.type = types[simtype[TUINT]];
nlen.xoffset += Array_nel-Array_array;
}
}
@ -621,7 +621,7 @@ agen(Node *n, Node *res)
nlen.type = types[tptr];
nlen.xoffset += Array_array;
gmove(&nlen, &n3);
nlen.type = types[TUINT32];
nlen.type = types[simtype[TUINT]];
nlen.xoffset += Array_nel-Array_array;
}
}
@ -656,9 +656,9 @@ agen(Node *n, Node *res)
v = mpgetfix(nr->val.u.xval);
if(isslice(nl->type) || nl->type->etype == TSTRING) {
if(!debug['B'] && !n->bounded) {
nodconst(&n2, types[TUINT32], v);
gins(optoas(OCMP, types[TUINT32]), &nlen, &n2);
p1 = gbranch(optoas(OGT, types[TUINT32]), T, +1);
nodconst(&n2, types[simtype[TUINT]], v);
gins(optoas(OCMP, types[simtype[TUINT]]), &nlen, &n2);
p1 = gbranch(optoas(OGT, types[simtype[TUINT]]), T, +1);
ginscall(panicindex, -1);
patch(p1, pc);
}
@ -683,7 +683,7 @@ agen(Node *n, Node *res)
if(!debug['B'] && !n->bounded) {
// check bounds
t = types[TUINT32];
t = types[simtype[TUINT]];
if(is64(nr->type))
t = types[TUINT64];
if(isconst(nl, CTSTR)) {
@ -1350,7 +1350,7 @@ componentgen(Node *nr, Node *nl)
gmove(&nodr, &nodl);
nodl.xoffset += Array_nel-Array_array;
nodl.type = types[TUINT32];
nodl.type = types[simtype[TUINT]];
if(nr != N) {
nodr.xoffset += Array_nel-Array_array;
@ -1360,7 +1360,7 @@ componentgen(Node *nr, Node *nl)
gmove(&nodr, &nodl);
nodl.xoffset += Array_cap-Array_nel;
nodl.type = types[TUINT32];
nodl.type = types[simtype[TUINT]];
if(nr != N) {
nodr.xoffset += Array_cap-Array_nel;
@ -1383,7 +1383,7 @@ componentgen(Node *nr, Node *nl)
gmove(&nodr, &nodl);
nodl.xoffset += Array_nel-Array_array;
nodl.type = types[TUINT32];
nodl.type = types[simtype[TUINT]];
if(nr != N) {
nodr.xoffset += Array_nel-Array_array;

1
src/cmd/6g/galign.c
View File

@ -27,6 +27,7 @@ void
betypeinit(void)
{
widthptr = 8;
widthint = 4;
zprog.link = P;
zprog.as = AGOK;

2
src/cmd/6g/gg.h
View File

@ -21,7 +21,7 @@ struct Addr
Sym* gotype;
Sym* sym;
Node* node;
int width;
int64 width;
uchar type;
uchar index;
uchar etype;

16
src/cmd/6g/gobj.c
View File

@ -312,8 +312,8 @@ datastring(char *s, int len, Addr *a)
a->type = D_EXTERN;
a->sym = sym;
a->node = sym->def;
a->offset = widthptr+4; // skip header
a->etype = TINT32;
a->offset = widthptr+widthint; // skip header
a->etype = simtype[TINT];
}
/*
@ -324,7 +324,7 @@ void
datagostring(Strlit *sval, Addr *a)
{
Sym *sym;
sym = stringsym(sval->s, sval->len);
a->type = D_EXTERN;
a->sym = sym;
@ -386,10 +386,10 @@ gdatastring(Node *nam, Strlit *sval)
p->to.type = D_ADDR;
//print("%P\n", p);
nodconst(&nod1, types[TINT32], sval->len);
nodconst(&nod1, types[TINT], sval->len);
p = gins(ADATA, nam, &nod1);
p->from.scale = types[TINT32]->width;
p->from.offset += types[tptr]->width;
p->from.scale = widthint;
p->from.offset += widthptr;
}
int
@ -408,7 +408,7 @@ dstringptr(Sym *s, int off, char *str)
datastring(str, strlen(str)+1, &p->to);
p->to.index = p->to.type;
p->to.type = D_ADDR;
p->to.etype = TINT32;
p->to.etype = simtype[TINT];
off += widthptr;
return off;
@ -432,7 +432,7 @@ dgostrlitptr(Sym *s, int off, Strlit *lit)
datagostring(lit, &p->to);
p->to.index = p->to.type;
p->to.type = D_ADDR;
p->to.etype = TINT32;
p->to.etype = simtype[TINT];
off += widthptr;
return off;

22
src/cmd/6g/gsubr.c
View File

@ -1247,9 +1247,9 @@ naddr(Node *n, Addr *a, int canemitcode)
naddr(n->left, a, canemitcode);
if(a->type == D_CONST && a->offset == 0)
break; // len(nil)
a->etype = TUINT32;
a->etype = simtype[TUINT];
a->offset += Array_nel;
a->width = 4;
a->width = widthint;
if(a->offset >= unmappedzero && a->offset-Array_nel < unmappedzero)
checkoffset(a, canemitcode);
break;
@ -1259,9 +1259,9 @@ naddr(Node *n, Addr *a, int canemitcode)
naddr(n->left, a, canemitcode);
if(a->type == D_CONST && a->offset == 0)
break; // cap(nil)
a->etype = TUINT32;
a->etype = simtype[TUINT];
a->offset += Array_cap;
a->width = 4;
a->width = widthint;
if(a->offset >= unmappedzero && a->offset-Array_cap < unmappedzero)
checkoffset(a, canemitcode);
break;
@ -2086,12 +2086,12 @@ oindex:
if(!debug['B'] && !n->bounded) {
// check bounds
n4.op = OXXX;
t = types[TUINT32];
t = types[simtype[TUINT]];
if(o & ODynam) {
if(o & OAddable) {
n2 = *l;
n2.xoffset += Array_nel;
n2.type = types[TUINT32];
n2.type = types[simtype[TUINT]];
if(is64(r->type)) {
t = types[TUINT64];
regalloc(&n4, t, N);
@ -2102,7 +2102,7 @@ oindex:
n2 = *reg;
n2.xoffset = Array_nel;
n2.op = OINDREG;
n2.type = types[TUINT32];
n2.type = types[simtype[TUINT]];
if(is64(r->type)) {
t = types[TUINT64];
regalloc(&n4, t, N);
@ -2180,8 +2180,8 @@ oindex_const:
n1.type = types[tptr];
n1.xoffset = Array_nel;
nodconst(&n2, types[TUINT64], v);
gins(optoas(OCMP, types[TUINT32]), &n1, &n2);
p1 = gbranch(optoas(OGT, types[TUINT32]), T, +1);
gins(optoas(OCMP, types[simtype[TUINT]]), &n1, &n2);
p1 = gbranch(optoas(OGT, types[simtype[TUINT]]), T, +1);
ginscall(panicindex, -1);
patch(p1, pc);
}
@ -2223,9 +2223,9 @@ oindex_const_sudo:
if(!debug['B'] && !n->bounded) {
a->offset += Array_nel;
nodconst(&n2, types[TUINT64], v);
p1 = gins(optoas(OCMP, types[TUINT32]), N, &n2);
p1 = gins(optoas(OCMP, types[simtype[TUINT]]), N, &n2);
p1->from = *a;
p1 = gbranch(optoas(OGT, types[TUINT32]), T, +1);
p1 = gbranch(optoas(OGT, types[simtype[TUINT]]), T, +1);
ginscall(panicindex, -1);
patch(p1, pc);
a->offset -= Array_nel;

5
src/cmd/6g/reg.c
View File

@ -945,7 +945,8 @@ Bits
mkvar(Reg *r, Adr *a)
{
Var *v;
int i, t, n, et, z, w, flag;
int i, t, n, et, z, flag;
int64 w;
uint32 regu;
int32 o;
Bits bit;
@ -998,7 +999,7 @@ mkvar(Reg *r, Adr *a)
o = a->offset;
w = a->width;
if(w < 0)
fatal("bad width %d for %D", w, a);
fatal("bad width %lld for %D", w, a);
flag = 0;
for(i=0; i<nvar; i++) {

1
src/cmd/8g/galign.c
View File

@ -27,6 +27,7 @@ void
betypeinit(void)
{
widthptr = 4;
widthint = 4;
zprog.link = P;
zprog.as = AGOK;

8
src/cmd/gc/align.c
View File

@ -615,12 +615,12 @@ typeinit(void)
}
Array_array = rnd(0, widthptr);
Array_nel = rnd(Array_array+widthptr, types[TUINT32]->width);
Array_cap = rnd(Array_nel+types[TUINT32]->width, types[TUINT32]->width);
sizeof_Array = rnd(Array_cap+types[TUINT32]->width, widthptr);
Array_nel = rnd(Array_array+widthptr, widthint);
Array_cap = rnd(Array_nel+widthint, widthint);
sizeof_Array = rnd(Array_cap+widthint, widthptr);
// string is same as slice wo the cap
sizeof_String = rnd(Array_nel+types[TUINT32]->width, widthptr);
sizeof_String = rnd(Array_nel+widthint, widthptr);
dowidth(types[TSTRING]);
dowidth(idealstring);

6
src/cmd/gc/gen.c
View File

@ -763,7 +763,7 @@ cgen_eface(Node *n, Node *res)
* generate:
* res = s[lo, hi];
* n->left is s
* n->list is (cap(s)-lo(TUINT32), hi-lo(TUINT32)[, lo*width(TUINTPTR)])
* n->list is (cap(s)-lo(TUINT), hi-lo(TUINT)[, lo*width(TUINTPTR)])
* caller (cgen) guarantees res is an addable ONAME.
*/
void
@ -780,14 +780,14 @@ cgen_slice(Node *n, Node *res)
// dst.len = hi [ - lo ]
dst = *res;
dst.xoffset += Array_nel;
dst.type = types[TUINT32];
dst.type = types[simtype[TUINT]];
cgen(len, &dst);
if(n->op != OSLICESTR) {
// dst.cap = cap [ - lo ]
dst = *res;
dst.xoffset += Array_cap;
dst.type = types[TUINT32];
dst.type = types[simtype[TUINT]];
cgen(cap, &dst);
}

1
src/cmd/gc/go.h
View File

@ -905,6 +905,7 @@ EXTERN int hasdefer; // flag that curfn has defer statetment
EXTERN Node* curfn;
EXTERN int widthptr;
EXTERN int widthint;
EXTERN Node* typesw;
EXTERN Node* nblank;

4
src/cmd/gc/obj.c
View File

@ -302,8 +302,8 @@ stringsym(char *s, int len)
off = 0;
// string header
off = dsymptr(sym, off, sym, widthptr+4);
off = duint32(sym, off, len);
off = dsymptr(sym, off, sym, widthptr+widthint);
off = duintxx(sym, off, len, widthint);
// string data
for(n=0; n<len; n+=m) {

30
src/cmd/gc/reflect.c
View File

@ -378,9 +378,9 @@ dextratype(Sym *sym, int off, Type *t, int ptroff)
}
// slice header
ot = dsymptr(s, ot, s, ot + widthptr + 2*4);
ot = duint32(s, ot, n);
ot = duint32(s, ot, n);
ot = dsymptr(s, ot, s, ot + widthptr + 2*widthint);
ot = duintxx(s, ot, n, widthint);
ot = duintxx(s, ot, n, widthint);
// methods
for(a=m; a; a=a->link) {
@ -780,13 +780,13 @@ ok:
// two slice headers: in and out.
ot = rnd(ot, widthptr);
ot = dsymptr(s, ot, s, ot+2*(widthptr+2*4));
ot = dsymptr(s, ot, s, ot+2*(widthptr+2*widthint));
n = t->thistuple + t->intuple;
ot = duint32(s, ot, n);
ot = duint32(s, ot, n);
ot = dsymptr(s, ot, s, ot+1*(widthptr+2*4)+n*widthptr);
ot = duint32(s, ot, t->outtuple);
ot = duint32(s, ot, t->outtuple);
ot = duintxx(s, ot, n, widthint);
ot = duintxx(s, ot, n, widthint);
ot = dsymptr(s, ot, s, ot+1*(widthptr+2*widthint)+n*widthptr);
ot = duintxx(s, ot, t->outtuple, widthint);
ot = duintxx(s, ot, t->outtuple, widthint);
// slice data
for(t1=getthisx(t)->type; t1; t1=t1->down, n++)
@ -808,9 +808,9 @@ ok:
// ../../pkg/runtime/type.go:/InterfaceType
ot = dcommontype(s, ot, t);
xt = ot - 2*widthptr;
ot = dsymptr(s, ot, s, ot+widthptr+2*4);
ot = duint32(s, ot, n);
ot = duint32(s, ot, n);
ot = dsymptr(s, ot, s, ot+widthptr+2*widthint);
ot = duintxx(s, ot, n, widthint);
ot = duintxx(s, ot, n, widthint);
for(a=m; a; a=a->link) {
// ../../pkg/runtime/type.go:/imethod
ot = dgostringptr(s, ot, a->name);
@ -853,9 +853,9 @@ ok:
}
ot = dcommontype(s, ot, t);
xt = ot - 2*widthptr;
ot = dsymptr(s, ot, s, ot+widthptr+2*4);
ot = duint32(s, ot, n);
ot = duint32(s, ot, n);
ot = dsymptr(s, ot, s, ot+widthptr+2*widthint);
ot = duintxx(s, ot, n, widthint);
ot = duintxx(s, ot, n, widthint);
for(t1=t->type; t1!=T; t1=t1->down) {
// ../../pkg/runtime/type.go:/structField
if(t1->sym && !t1->embedded) {

6
src/cmd/gc/runtime.go
View File

@ -46,8 +46,6 @@ func appendstr(typ *byte, x []byte, y string) []byte
func cmpstring(string, string) int
func eqstring(string, string) bool
func slicestring(string, int, int) string
func slicestring1(string, int) string
func intstring(int64) string
func slicebytetostring([]byte) string
func slicerunetostring([]rune) string
@ -55,7 +53,7 @@ func stringtoslicebyte(string) []byte
func stringtoslicerune(string) []rune
func stringiter(string, int) int
func stringiter2(string, int) (retk int, retv rune)
func copy(to any, fr any, wid uint32) int
func copy(to any, fr any, wid uintptr) int
func slicestringcopy(to any, fr any) int
// interface conversions
@ -109,7 +107,7 @@ func selectnbsend(chanType *byte, hchan chan<- any, elem any) bool
func selectnbrecv(chanType *byte, elem *any, hchan <-chan any) bool
func selectnbrecv2(chanType *byte, elem *any, received *bool, hchan <-chan any) bool
func newselect(size int) (sel *byte)
func newselect(size int32) (sel *byte)
func selectsend(sel *byte, hchan chan<- any, elem *any) (selected bool)
func selectrecv(sel *byte, hchan <-chan any, elem *any) (selected bool)
func selectrecv2(sel *byte, hchan <-chan any, elem *any, received *bool) (selected bool)

14
src/cmd/gc/sinit.c
View File

@ -300,9 +300,9 @@ staticcopy(Node *l, Node *r, NodeList **out)
n1.xoffset = l->xoffset + Array_array;
gdata(&n1, nod(OADDR, a, N), widthptr);
n1.xoffset = l->xoffset + Array_nel;
gdata(&n1, r->right, 4);
gdata(&n1, r->right, widthint);
n1.xoffset = l->xoffset + Array_cap;
gdata(&n1, r->right, 4);
gdata(&n1, r->right, widthint);
return 1;
}
// fall through
@ -403,9 +403,9 @@ staticassign(Node *l, Node *r, NodeList **out)
n1.xoffset = l->xoffset + Array_array;
gdata(&n1, nod(OADDR, a, N), widthptr);
n1.xoffset = l->xoffset + Array_nel;
gdata(&n1, r->right, 4);
gdata(&n1, r->right, widthint);
n1.xoffset = l->xoffset + Array_cap;
gdata(&n1, r->right, 4);
gdata(&n1, r->right, widthint);
// Fall through to init underlying array.
l = a;
}
@ -1232,11 +1232,11 @@ slice:
gdata(&nam, nl, types[tptr]->width);
nam.xoffset += Array_nel-Array_array;
nodconst(&nod1, types[TINT32], nr->type->bound);
gdata(&nam, &nod1, types[TINT32]->width);
nodconst(&nod1, types[TINT], nr->type->bound);
gdata(&nam, &nod1, widthint);
nam.xoffset += Array_cap-Array_nel;
gdata(&nam, &nod1, types[TINT32]->width);
gdata(&nam, &nod1, widthint);
goto yes;

10
src/cmd/gc/walk.c
View File

@ -2496,7 +2496,7 @@ sliceany(Node* n, NodeList **init)
chk1 = N;
chk2 = N;
bt = types[TUINT32];
bt = types[simtype[TUINT]];
if(hb != N && hb->type->width > 4)
bt = types[TUINT64];
if(lb != N && lb->type->width > 4)
@ -2546,18 +2546,18 @@ sliceany(Node* n, NodeList **init)
n->right = N;
n->list = nil;
if(lb == N)
bound = conv(bound, types[TUINT32]);
bound = conv(bound, types[simtype[TUINT]]);
else
bound = nod(OSUB, conv(bound, types[TUINT32]), conv(lb, types[TUINT32]));
bound = nod(OSUB, conv(bound, types[simtype[TUINT]]), conv(lb, types[simtype[TUINT]]));
typecheck(&bound, Erv);
walkexpr(&bound, init);
n->list = list(n->list, bound);
// len = hi [ - lo]
if(lb == N)
hb = conv(hb, types[TUINT32]);
hb = conv(hb, types[simtype[TUINT]]);
else
hb = nod(OSUB, conv(hb, types[TUINT32]), conv(lb, types[TUINT32]));
hb = nod(OSUB, conv(hb, types[simtype[TUINT]]), conv(lb, types[simtype[TUINT]]));
typecheck(&hb, Erv);
walkexpr(&hb, init);
n->list = list(n->list, hb);