From: Glenn Kennard <glenn.kennard@gmail.com>
Date: Thu, 27 Aug 2015 17:04:17 +0000 (+0200)
Subject: r600g/sb: Don't crash on empty if jump target
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=608c7b4a63d5818f7ae0b3d48496b02cf8458d9b;p=mesa.git

r600g/sb: Don't crash on empty if jump target

Signed-off-by: Glenn Kennard <glenn.kennard@gmail.com>
Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
index 748aae29eeb..c4799270d9f 100644
--- a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
+++ b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp
@@ -792,6 +792,9 @@ int bc_parser::prepare_if(cf_node* c) {
 	assert(c->bc.addr-1 < cf_map.size());
 	cf_node *c_else = NULL, *end = cf_map[c->bc.addr];
 
+	if (!end)
+		return 0; // not quite sure how this happens, malformed input?
+
 	BCP_DUMP(
 		sblog << "parsing JUMP @" << c->bc.id;
 		sblog << "\n";
@@ -817,7 +820,7 @@ int bc_parser::prepare_if(cf_node* c) {
 	if (c_else->parent != c->parent)
 		c_else = NULL;
 
-	if (end->parent != c->parent)
+	if (end && end->parent != c->parent)
 		end = NULL;
 
 	region_node *reg = sh->create_region();