From: Ivan Maidanski <ivmai@mail.ru>
Date: Tue, 12 Mar 2013 18:29:33 +0000 (+0400)
Subject: Fix asm constraint of compare_and_swap for clang-3.1/mips
X-Git-Tag: libatomic_ops-7_2e~13
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=83be5947daf586924b54762415d0ca27e1a55942;p=libatomic_ops

Fix asm constraint of compare_and_swap for clang-3.1/mips
(Apply commit 3e4c369 from 'master' branch.)

* src/atomic_ops/sysdeps/gcc/mips.h (AO_compare_and_swap): Use "+m"
asm constraint for *addr instead of "+R" (the letter is unsupported
by clang3.1 resulting in "invalid output constraint in asm" error).

Conflicts:

    src/atomic_ops/sysdeps/gcc/mips.h
---

diff --git a/src/atomic_ops/sysdeps/gcc/mips.h b/src/atomic_ops/sysdeps/gcc/mips.h
index 527a347..e09a558 100644
--- a/src/atomic_ops/sysdeps/gcc/mips.h
+++ b/src/atomic_ops/sysdeps/gcc/mips.h
@@ -59,7 +59,7 @@ AO_compare_and_swap(volatile AO_t *addr, AO_t old, AO_t new_val)
       "       beqz    %0, 1b      \n"
       "       li      %2, 1       \n"
       "2:                           "
-      : "=&r" (temp), "+R" (*addr), "+r" (was_equal)
+      : "=&r" (temp), "+m" (*addr), "+r" (was_equal)
       : "r" (new_val), "r" (old)
       : "memory");
   return was_equal;