[PATCH] Invalid unpoisoning of stack redzones on ARM

[Yury Gribov]

Hi all,

I've recently submitted a bug report regarding invalid unpoisoning of 
stack frame redzones 
(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58543). Could someone take 
a look at proposed patch (a simple one-liner) and check whether it's ok 
for commit?

Thanks!

-Yuri
diff --git a/gcc/asan.c b/gcc/asan.c
index 32f1837..acb00ea 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -895,7 +895,7 @@ asan_clear_shadow (rtx shadow_mem, HOST_WIDE_INT len)
 
   gcc_assert ((len & 3) == 0);
   top_label = gen_label_rtx ();
-  addr = force_reg (Pmode, XEXP (shadow_mem, 0));
+  addr = copy_to_reg (force_reg (Pmode, XEXP (shadow_mem, 0)));
   shadow_mem = adjust_automodify_address (shadow_mem, SImode, addr, 0);
   end = force_reg (Pmode, plus_constant (Pmode, addr, len));
   emit_label (top_label);