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compiler implementation of array slice change

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R=ken
OCL=27533
CL=27533
This commit is contained in:
Russ Cox 2009-04-15 20:27:22 -07:00
parent 37a5374c81
commit 65d397f747
1 changed files with 13 additions and 7 deletions
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20
src/cmd/gc/walk.c
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@ -1956,7 +1956,13 @@ ascompat(Type *dst, Type *src)
if(eqtype(dst, src, 0))
return 1;
if(isslice(dst) && isfixedarray(src) && eqtype(dst->type, src->type, 0))
if(dst == T || src == T)
return 0;
if(isslice(dst)
&& isptr[src->etype]
&& isfixedarray(src->type)
&& eqtype(dst->type, src->type->type, 0))
return 1;
if(isnilinter(dst) || isnilinter(src))
@ -2194,6 +2200,8 @@ stringop(Node *n, int top)
case OARRAY:
// arraystring([]byte) string;
r = n->left;
if(isfixedarray(r->type))
r = nod(OADDR, r, N);
on = syslook("arraystring", 0);
r = nod(OCALL, on, r);
break;
@ -2716,7 +2724,7 @@ arrayop(Node *n, int top)
case OAS:
// arrays2d(old *any, nel int) (ary []any)
t = fixarray(n->right->type);
t = fixarray(n->right->type->type);
tl = fixarray(n->left->type);
if(t == T || tl == T)
break;
@ -2726,9 +2734,7 @@ arrayop(Node *n, int top)
a->type = types[TINT];
r = a;
a = nod(OADDR, n->right, N); // old
addrescapes(n->right);
r = list(a, r);
r = list(n->right, r); // old
on = syslook("arrays2d", 1);
argtype(on, t); // any-1
@ -3019,8 +3025,8 @@ convas(Node *n)
goto out;
}
if(isslice(lt) && isfixedarray(rt)) {
if(!eqtype(lt->type->type, rt->type->type, 0))
if(isslice(lt) && isptr[rt->etype] && isfixedarray(rt->type)) {
if(!eqtype(lt->type->type, rt->type->type->type, 0))
goto bad;
indir(n, arrayop(n, Etop));
goto out;