1 files changed, 40 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0269-PR-target-48986.patch b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0269-PR-target-48986.patch
new file mode 100644
index 0000000000..8e20e6eea8
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0269-PR-target-48986.patch
@@ -0,0 +1,40 @@
+From 56cf6a6c3274fd4af2ccfc2ca019904d873d30fe Mon Sep 17 00:00:00 2001
+From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Tue, 17 May 2011 07:42:30 +0000
+Subject: [PATCH]        PR target/48986
+        * config/i386/sync.md (sync_old_add<mode>): Relax operand 2
+        predicate to allow CONST_INT.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@173817 138bc75d-0d04-0410-961f-82ee72b054a4
+
+index 22f3648..3fdfee2 100644
+--- a/gcc/config/i386/sync.md
++++ b/gcc/config/i386/sync.md
+@@ -1,5 +1,5 @@
+ ;; GCC machine description for i386 synchronization instructions.
+-;; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
++;; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ ;; Free Software Foundation, Inc.
+ ;;
+ ;; This file is part of GCC.
+@@ -164,13 +164,16 @@
+   "!TARGET_64BIT && TARGET_CMPXCHG8B && flag_pic"
+   "xchg{l}\t%%ebx, %3\;lock{%;} cmpxchg8b\t%1\;xchg{l}\t%%ebx, %3")
+ 
++;; For operand 2 nonmemory_operand predicate is used instead of
++;; register_operand to allow combiner to better optimize atomic
++;; additions of constants.
+ (define_insn "sync_old_add<mode>"
+   [(set (match_operand:SWI 0 "register_operand" "=<r>")
+        (unspec_volatile:SWI
+          [(match_operand:SWI 1 "memory_operand" "+m")] UNSPECV_XCHG))
+    (set (match_dup 1)
+        (plus:SWI (match_dup 1)
+-                 (match_operand:SWI 2 "register_operand" "0")))
++                 (match_operand:SWI 2 "nonmemory_operand" "0")))
+    (clobber (reg:CC FLAGS_REG))]
+   "TARGET_XADD"
+   "lock{%;} xadd{<imodesuffix>}\t{%0, %1|%1, %0}")
+-- 
+1.7.0.4
+