diff --git a/gcc.spec b/gcc.spec
index 090b0ac..eb4fa12 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -3,7 +3,7 @@
 %global gcc_version 4.8.2
 # Note, gcc_release must be integer, if you want to add suffixes to
 # %{release}, append them after %{gcc_release} on Release: line.
-%global gcc_release 5
+%global gcc_release 6
 %global _unpackaged_files_terminate_build 0
 %global multilib_64_archs sparc64 ppc64 s390x x86_64
 %ifarch %{ix86} x86_64 ia64 ppc ppc64 alpha
@@ -196,6 +196,7 @@ Patch12: gcc48-no-add-needed.patch
 Patch13: gcc48-pr56564.patch
 Patch14: gcc48-pr56493.patch
 Patch15: gcc48-color-auto.patch
+Patch16: gcc48-pr58956-revert.patch
 
 Patch1000: fastjar-0.97-segfault.patch
 Patch1001: fastjar-0.97-len1.patch
@@ -755,6 +756,7 @@ package or when debugging this package.
 %if 0%{?fedora} >= 20 || 0%{?rhel} >= 7
 %patch15 -p0 -b .color-auto~
 %endif
+%patch16 -p0 -b .pr58956-revert~
 
 %if 0%{?_enable_debug_packages}
 cat > split-debuginfo.sh <<\EOF
@@ -3021,6 +3023,10 @@ fi
 %{_prefix}/libexec/gcc/%{gcc_target_platform}/%{gcc_version}/plugin
 
 %changelog
+* Wed Dec 11 2013 Jakub Jelinek <jakub@redhat.com> 4.8.2-6
+- temporarily revert PR middle-end/58956 to avoid libstdc++
+  miscompilation on i?86 (PR middle-end/59470)
+
 * Mon Dec  9 2013 Jakub Jelinek <jakub@redhat.com> 4.8.2-5
 - update from the 4.8 branch
   - PRs ada/59382, bootstrap/57683, c++/58162, c++/59031, c++/59032,
diff --git a/gcc48-pr58956-revert.patch b/gcc48-pr58956-revert.patch
new file mode 100644
index 0000000..711b483
--- /dev/null
+++ b/gcc48-pr58956-revert.patch
@@ -0,0 +1,33 @@
+Temporarily revert:
+2013-12-05  Richard Biener  <rguenther@suse.de>
+
+	Backport from mainline
+	2013-11-19  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/58956
+	* tree-ssa-ter.c (find_replaceable_in_bb): Avoid forwarding
+	loads into stmts that may clobber it.
+
+--- gcc/tree-ssa-ter.c	(revision 205709)
++++ gcc/tree-ssa-ter.c	(revision 205708)
+@@ -643,7 +643,8 @@ find_replaceable_in_bb (temp_expr_table_
+ 	      /* If the stmt does a memory store and the replacement
+ 	         is a load aliasing it avoid creating overlapping
+ 		 assignments which we cannot expand correctly.  */
+-	      if (gimple_vdef (stmt))
++	      if (gimple_vdef (stmt)
++		  && gimple_assign_single_p (stmt))
+ 		{
+ 		  gimple def_stmt = SSA_NAME_DEF_STMT (use);
+ 		  while (is_gimple_assign (def_stmt)
+@@ -652,8 +653,8 @@ find_replaceable_in_bb (temp_expr_table_
+ 		      = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (def_stmt));
+ 		  if (gimple_vuse (def_stmt)
+ 		      && gimple_assign_single_p (def_stmt)
+-		      && stmt_may_clobber_ref_p (stmt,
+-						 gimple_assign_rhs1 (def_stmt)))
++		      && refs_may_alias_p (gimple_assign_lhs (stmt),
++					   gimple_assign_rhs1 (def_stmt)))
+ 		    same_root_var = true;
+ 		}
+