diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7374a6d7d92..c0b6d763f38 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-12-21  Aldy Hernandez  <aldyh@redhat.com>
+
+	PR middle-end/51472
+	* trans-mem.c (tm_log_add): Use create_tmp_var_reg.
+
 2011-12-21  Martin Jambor  <mjambor@suse.cz>
 
 	* tree-into-ssa.c (rewrite_update_stmt): Do not dump extra newlines.
diff --git a/gcc/testsuite/gcc.dg/tm/pr51472.c b/gcc/testsuite/gcc.dg/tm/pr51472.c
new file mode 100644
index 00000000000..2897c3d78c9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tm/pr51472.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-fgnu-tm -O  --param tm-max-aggregate-size=32" } */
+
+typedef int __attribute__ ((vector_size (16))) vectype;
+vectype v;
+
+void
+foo (int c)
+{
+  vectype *p = __builtin_malloc (sizeof (vectype));
+  __transaction_atomic
+  {
+    *p = v;
+    if (c)
+      __transaction_cancel;
+  }
+}
diff --git a/gcc/trans-mem.c b/gcc/trans-mem.c
index 02f8a181dab..c0a8b8c8ac4 100644
--- a/gcc/trans-mem.c
+++ b/gcc/trans-mem.c
@@ -1003,7 +1003,7 @@ tm_log_add (basic_block entry_block, tree addr, gimple stmt)
 	     special constructors and the like.  */
 	  && !TREE_ADDRESSABLE (type))
 	{
-	  lp->save_var = create_tmp_var (TREE_TYPE (lp->addr), "tm_save");
+	  lp->save_var = create_tmp_reg (TREE_TYPE (lp->addr), "tm_save");
 	  add_referenced_var (lp->save_var);
 	  lp->stmts = NULL;
 	  lp->entry_block = entry_block;