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bug136

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R=ken
OCL=35902
CL=35904
This commit is contained in:
Russ Cox 2009-10-19 20:39:18 -07:00
parent a15aa05ae2
commit 62c4818ee0
5 changed files with 10 additions and 30 deletions
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30
src/cmd/gc/gen.c
View File

@ -62,7 +62,7 @@ allocparams(void)
}
void
newlab(int op, Sym *s)
newlab(int op, Sym *s, Node *stmt)
{
Label *lab;
@ -73,6 +73,7 @@ newlab(int op, Sym *s)
lab->sym = s;
lab->op = op;
lab->label = pc;
lab->stmt = stmt;
}
void
@ -88,7 +89,6 @@ checklabels(void)
for(l=labellist; l!=L; l=l->link) {
switch(l->op) {
case OFOR:
case OLABEL:
// these are definitions -
s = l->sym;
@ -96,7 +96,6 @@ checklabels(void)
if(m->sym != s)
continue;
switch(m->op) {
case OFOR:
case OLABEL:
// these are definitions -
// look for redefinitions
@ -120,21 +119,6 @@ checklabels(void)
yyerror("label %S not defined", l->sym);
}
Label*
findlab(Sym *s)
{
Label *l;
for(l=labellist; l!=L; l=l->link) {
if(l->sym != s)
continue;
if(l->op != OFOR)
continue;
return l;
}
return L;
}
/*
* compile statements
*/
@ -191,11 +175,11 @@ gen(Node *n)
break;
case OLABEL:
newlab(OLABEL, n->left->sym);
newlab(OLABEL, n->left->sym, n->right);
break;
case OGOTO:
newlab(OGOTO, n->left->sym);
newlab(OGOTO, n->left->sym, N);
gjmp(P);
break;
@ -252,7 +236,7 @@ gen(Node *n)
continpc = pc;
// define break and continue labels
if((lab = labellist) != L && lab->label == p3 && lab->op == OLABEL) {
if((lab = labellist) != L && lab->label == p3 && lab->op == OLABEL && lab->stmt == n) {
lab->breakpc = breakpc;
lab->continpc = continpc;
}
@ -291,7 +275,7 @@ gen(Node *n)
breakpc = gjmp(P); // break: goto done
// define break label
if((lab = labellist) != L && lab->label == p3 && lab->op == OLABEL)
if((lab = labellist) != L && lab->label == p3 && lab->op == OLABEL && lab->stmt == n)
lab->breakpc = breakpc;
patch(p1, pc); // test:
@ -306,7 +290,7 @@ gen(Node *n)
breakpc = gjmp(P); // break: goto done
// define break label
if((lab = labellist) != L && lab->label == p3 && lab->op == OLABEL)
if((lab = labellist) != L && lab->label == p3 && lab->op == OLABEL && lab->stmt == n)
lab->breakpc = breakpc;
patch(p1, pc); // test:

5
src/cmd/gc/go.h
View File

@ -1089,6 +1089,7 @@ struct Label
{
uchar op; // OGOTO/OLABEL
Sym* sym;
Node* stmt;
Prog* label; // pointer to code
Prog* breakpc; // pointer to code
Prog* continpc; // pointer to code
@ -1097,7 +1098,6 @@ struct Label
#define L ((Label*)0)
EXTERN Label* labellist;
EXTERN Label* findlab(Sym*);
typedef struct Plist Plist;
struct Plist
@ -1126,10 +1126,9 @@ void cgen_callmeth(Node *n, int proc);
void cgen_dcl(Node *n);
void cgen_proc(Node *n, int proc);
void checklabels(void);
Label* findlab(Sym *s);
void gen(Node *n);
void genlist(NodeList *l);
void newlab(int op, Sym *s);
void newlab(int op, Sym *s, Node*);
Node* sysfunc(char *name);
Plist* newplist(void);

2
src/cmd/gc/go.y
View File

@ -1380,7 +1380,7 @@ stmt:
{
NodeList *l;
l = list1(nod(OLABEL, $1, N));
l = list1(nod(OLABEL, $1, $3));
if($3)
l = list(l, $3);
$$ = liststmt(l);

0
test/bugs/bug136.go → test/fixedbugs/bug136.go
View File

3
test/golden.out
View File

@ -140,9 +140,6 @@ panic PC=xxx
== bugs/
=========== bugs/bug136.go
BUG: errchk: command succeeded unexpectedly
=========== bugs/bug162.go
123
BUG: should fail