From: Volker Dobler <dr.volker.dobler@gmail.com>
Date: Tue, 27 Aug 2013 13:38:11 +0000 (-0700)
Subject: cmd/gc: mark panicslice as unlikely
X-Git-Tag: go1.2rc2~419
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=7c8be15b8ac477c2e6dc50da703d25345aa51e04;p=gostls13.git

cmd/gc: mark panicslice as unlikely

No measurable impact on performance on amd64

R=golang-dev, khr, bradfitz
CC=golang-dev
https://golang.org/cl/13096045
---

diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index bc0a15e1a0..98a5a8968e 100644
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -2729,6 +2729,7 @@ sliceany(Node* n, NodeList **init)
 	if(chk0 != N || chk1 != N || chk2 != N) {
 		chk = nod(OIF, N, N);
 		chk->nbody = list1(mkcall("panicslice", T, init));
+		chk->likely = -1;
 		if(chk0 != N)
 			chk->ntest = chk0;
 		if(chk1 != N) {