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undo CL 5485063 / 21595dc0395a

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breaks 64-bit build

««« original CL description
8c: handle 64-bit switch value
Cases must still be 32-bit values, but one thing at a time.

R=ality, ken2, ken
CC=golang-dev
https://golang.org/cl/5485063
»»»

R=ken2
CC=golang-dev
https://golang.org/cl/5488075
This commit is contained in:
Russ Cox 2011-12-14 00:46:07 -05:00
parent 1e63a4e424
commit c8a5f8841c
2 changed files with 15 additions and 47 deletions
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40
src/cmd/8c/swt.c
View File

@ -36,39 +36,11 @@ swit1(C1 *q, int nc, int32 def, Node *n)
C1 *r;
int i;
Prog *sp;
Node n1, nreg, ncon;
if(typev[n->type->etype]) {
if(n->op != ONAME || n->sym != nodsafe->sym) {
regsalloc(&nreg, n);
nreg.type = types[TVLONG];
cgen(n, &nreg);
swit1(q, nc, def, &nreg);
return;
}
} else {
if(n->op != OREGISTER) {
regalloc(&nreg, n, Z);
nreg.type = types[TLONG];
cgen(n, &nreg);
swit1(q, nc, def, &nreg);
regfree(&nreg);
return;
}
}
if(nc < 5) {
for(i=0; i<nc; i++) {
if(debug['W'])
print("case = %.8ux\n", q->val);
if(n->type && typev[n->type->etype]) {
memset(&n1, 0, sizeof n1);
n1.op = OEQ;
n1.left = n;
ncon = *nodconst(q->val);
n1.right = &ncon;
boolgen(&n1, 1, Z);
} else
gopcode(OEQ, n->type, n, nodconst(q->val));
patch(p, q->label);
q++;
@ -81,22 +53,10 @@ swit1(C1 *q, int nc, int32 def, Node *n)
r = q+i;
if(debug['W'])
print("case > %.8ux\n", r->val);
if(n->type && typev[n->type->etype]) {
memset(&n1, 0, sizeof n1);
n1.op = OGT;
n1.left = n;
ncon = *nodconst(r->val);
n1.right = &ncon;
boolgen(&n1, 1, Z);
sp = p;
n1.op = OEQ;
boolgen(&n1, 1, Z);
} else {
gopcode(OGT, n->type, n, nodconst(r->val));
sp = p;
gbranch(OGOTO);
p->as = AJEQ;
}
patch(p, r->label);
swit1(q, i, def, n);

12
src/cmd/cc/pgen.c
View File

@ -293,7 +293,7 @@ loop:
complex(l);
if(l->type == T)
break;
if(!typechlvp[l->type->etype] || l->type->etype == TIND) {
if(!typeword[l->type->etype] || l->type->etype == TIND) {
diag(n, "switch expression must be integer");
break;
}
@ -320,7 +320,15 @@ loop:
}
patch(sp, pc);
doswit(l);
regalloc(&nod, l, Z);
/* always signed */
if(typev[l->type->etype])
nod.type = types[TVLONG];
else
nod.type = types[TLONG];
cgen(l, &nod);
doswit(&nod);
regfree(&nod);
patch(spb, pc);
cases = cn;