depricate panicln

R=rsc
CC=golang-dev
https://golang.org/cl/743041

src/cmd/gc/go.h

@@ -376,7 +376,7 @@ enum
 	ONEW,
 	ONOT, OCOM, OPLUS, OMINUS,
 	OOROR,
-	OPANIC, OPANICN, OPRINT, OPRINTN,
+	OPANIC, OPRINT, OPRINTN,
 	OSEND, OSENDNB,
 	OSLICE, OSLICEARR, OSLICESTR,
 	ORECV,

src/cmd/gc/lex.c

@@ -1305,7 +1305,6 @@ static	struct
 	"make",		LNAME,		Txxx,		OMAKE,
 	"new",		LNAME,		Txxx,		ONEW,
 	"panic",	LNAME,		Txxx,		OPANIC,
-	"panicln",	LNAME,		Txxx,		OPANICN,
 	"print",	LNAME,		Txxx,		OPRINT,
 	"println",	LNAME,		Txxx,		OPRINTN,
 	"real",		LNAME,		Txxx,		OREAL,

src/cmd/gc/print.c

@@ -48,7 +48,6 @@ exprfmt(Fmt *f, Node *n, int prec)
 	case OMAKE:
 	case ONEW:
 	case OPANIC:
-	case OPANICN:
 	case OPRINT:
 	case OPRINTN:
 	case OCALL:
@@ -351,7 +350,6 @@ exprfmt(Fmt *f, Node *n, int prec)
 	case OMAKE:
 	case ONEW:
 	case OPANIC:
-	case OPANICN:
 	case OPRINT:
 	case OPRINTN:
 		fmtprint(f, "%#O(", n->op);

src/cmd/gc/subr.c

@@ -832,7 +832,6 @@ goopnames[] =
 	[ONOT]		= "!",
 	[OOROR]		= "||",
 	[OOR]		= "|",
-	[OPANICN]	= "panicln",
 	[OPANIC]	= "panic",
 	[OPLUS]		= "+",
 	[OPRINTN]	= "println",

src/cmd/gc/typecheck.c

@@ -1013,7 +1013,6 @@ reswitch:
 		goto ret;
 
 	case OPANIC:
-	case OPANICN:
 	case OPRINT:
 	case OPRINTN:
 		ok |= Etop;

src/cmd/gc/walk.c

@@ -54,7 +54,6 @@ loop:
 	case OGOTO:
 	case ORETURN:
 	case OPANIC:
-	case OPANICN:
 		return 0;
 		break;
 	}
@@ -374,7 +373,6 @@ walkstmt(Node **np)
 	case OPRINT:
 	case OPRINTN:
 	case OPANIC:
-	case OPANICN:
 	case OEMPTY:
 		if(n->typecheck == 0)
 			fatal("missing typecheck");
@@ -411,7 +409,6 @@ walkstmt(Node **np)
 		case OPRINT:
 		case OPRINTN:
 		case OPANIC:
-		case OPANICN:
 			walkexprlist(n->left->list, &n->ninit);
 			n->left = walkprint(n->left, &n->ninit, 1);
 			break;
@@ -612,7 +609,6 @@ walkexpr(Node **np, NodeList **init)
 	case OPRINT:
 	case OPRINTN:
 	case OPANIC:
-	case OPANICN:
 		walkexprlist(n->list, init);
 		n = walkprint(n, init, 0);
 		goto ret;
@@ -1712,7 +1708,7 @@ walkprint(Node *nn, NodeList **init, int defer)
 			else
 				calls = list(calls, mkcall("printsp", T, init));
 		}
-		notfirst = op == OPRINTN || op == OPANICN;
+		notfirst = op == OPRINTN;
 
 		n = l->n;
 		if(n->op == OLITERAL) {
@@ -1828,7 +1824,7 @@ walkprint(Node *nn, NodeList **init, int defer)
 	if(defer) {
 		if(op == OPRINTN)
 			fmtprint(&fmt, "\n");
-		if(op == OPANIC || op == OPANICN)
+		if(op == OPANIC)
 			fmtprint(&fmt, "%%!");
 		on = syslook("printf", 1);
 		on->type = functype(nil, intypes, nil);
@@ -1845,7 +1841,7 @@ walkprint(Node *nn, NodeList **init, int defer)
 		typechecklist(calls, Etop);
 		walkexprlist(calls, init);
 
-		if(op == OPANIC || op == OPANICN)
+		if(op == OPANIC)
 			r = mkcall("panicl", T, nil);
 		else
 			r = nod(OEMPTY, N, N);