gcc-4.7: fix gcc ICE when building with gcc-4.8

Backport fix for internal compiler error when building gcc-4.7.2 with a
gcc-4.8.0 host gcc.

See upstream bug here: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56308

(From OE-Core rev: b1dc91969f9bb0c2a3a4336f5e9a2f57aabb9f78)

Signed-off-by: Josh Cartwright <josh.cartwright@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 47 insertions, 1 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.7.inc b/meta/recipes-devtools/gcc/gcc-4.7.inc
index a05cac99cd..81c8f070ac 100644
--- a/meta/recipes-devtools/gcc/gcc-4.7.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.7.inc
@@ -1,6 +1,6 @@
 require gcc-common.inc
 
-PR = "r19"
+PR = "r20"
 
 # Third digit in PV should be incremented after a minor release
 # happens from this branch on gcc e.g. currently its 4.7.1
@@ -77,6 +77,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
            file://use-ml-conf-files-from-B.patch \
            file://wcast-qual-PR55383.patch \
            file://disable-texinfo-5.patch \
+           file://avoid-oob-array-access.patch \
           "
 SRC_URI[md5sum] = "cc308a0891e778cfda7a151ab8a6e762"
 SRC_URI[sha256sum] = "8a9283d7010fb9fe5ece3ca507e0af5c19412626384f8a5e9434251ae100b084"
diff --git a/meta/recipes-devtools/gcc/gcc-4.7/avoid-oob-array-access.patch b/meta/recipes-devtools/gcc/gcc-4.7/avoid-oob-array-access.patch
new file mode 100644
index 0000000000..4ba707d0b2
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.7/avoid-oob-array-access.patch
@@ -0,0 +1,45 @@
+Upstream-Status: Backport
+
+See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56308
+
+From 1e37e371d2cca3549b71a247bf79778aa1a9e1c4 Mon Sep 17 00:00:00 2001
+From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Fri, 21 Sep 2012 10:08:35 +0000
+Subject: [PATCH] 2012-09-21  Richard Guenther  <rguenther@suse.de>
+
+        PR middle-end/54638
+        Backport from mainline
+        2012-04-19  Richard Guenther  <rguenther@suse.de>
+
+        * ira-int.h (ira_allocno_object_iter_cond): Avoid out-of-bound
+        array access.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@191605 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+ gcc/ChangeLog | 9 +++++++++
+ gcc/ira-int.h | 9 +++++++--
+ 2 files changed, 16 insertions(+), 2 deletions(-)
+
+diff --git a/gcc/ira-int.h b/gcc/ira-int.h
+index 9faabb5..771a368 100644
+--- a/gcc/ira-int.h
++++ b/gcc/ira-int.h
+@@ -1138,8 +1138,13 @@ static inline bool
+ ira_allocno_object_iter_cond (ira_allocno_object_iterator *i, ira_allocno_t a,
+                              ira_object_t *o)
+ {
+-  *o = ALLOCNO_OBJECT (a, i->n);
+-  return i->n++ < ALLOCNO_NUM_OBJECTS (a);
++  int n = i->n++;
++  if (n < ALLOCNO_NUM_OBJECTS (a))
++    {
++      *o = ALLOCNO_OBJECT (a, n);
++      return true;
++    }
++  return false;
+ }
+ 
+ /* Loop over all objects associated with allocno A.  In each
+-- 
+1.8.2.2
+