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[cc1] fix continue statement within for loop

--- a/cc1/stmt.c

+++ b/cc1/stmt.c

@@ -92,12 +92,13 @@

 static void

 For(Symbol *lbreak, Symbol *lcont, Switch *lswitch)

 {

-	Symbol *begin, *cond, *end;

+	Symbol *begin, *cond;

 	Node *econd, *einc, *einit;

 	begin = newlabel();

-	end = newlabel();

+	lcont = newlabel();

 	cond = newlabel();

+	lbreak = newlabel();

 	expect(FOR);

 	expect('(');

@@ -110,15 +111,18 @@

 	emit(OEXPR, einit);

 	emit(OJUMP, cond);

+

 	emit(OBLOOP, NULL);

 	emit(OLABEL, begin);

-	stmt(end, begin, lswitch);

+	stmt(lbreak, lcont, lswitch);

+	emit(OLABEL, lcont);

 	emit(OEXPR, einc);

 	emit(OLABEL, cond);

 	emit((econd) ? OBRANCH : OJUMP, begin);

 	emit(OEXPR, econd);

 	emit(OELOOP, NULL);

-	emit(OLABEL, end);

+

+	emit(OLABEL, lbreak);

 }

 static void