From 1d896f48fa2f796ba13773ab735ef40fa3afb257 Mon Sep 17 00:00:00 2001
From: Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
Date: Mon, 16 Jul 2018 09:03:48 +0000
Subject: [PATCH] [Patch AArch64] Add early clobber for
 aarch64_store_exclusive.

From-SVN: r262686
---
 gcc/ChangeLog                 | 5 +++++
 gcc/config/aarch64/atomics.md | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5ed47c1..3e394ae 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-07-16  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	* config/aarch64/atomics.md (aarch64_store_execlusive<mode>): Add
+	early clobber.
+
 2018-07-16  Eric Botcazou  <ebotcazou@adacore.com>
 
 	PR tree-optimization/86514
diff --git a/gcc/config/aarch64/atomics.md b/gcc/config/aarch64/atomics.md
index 68dc65c..cd8c44e 100644
--- a/gcc/config/aarch64/atomics.md
+++ b/gcc/config/aarch64/atomics.md
@@ -530,7 +530,7 @@
 )
 
 (define_insn "aarch64_store_exclusive<mode>"
-  [(set (match_operand:SI 0 "register_operand" "=r")
+  [(set (match_operand:SI 0 "register_operand" "=&r")
     (unspec_volatile:SI [(const_int 0)] UNSPECV_SX))
    (set (match_operand:ALLI 1 "aarch64_sync_memory_operand" "=Q")
     (unspec_volatile:ALLI
-- 
2.7.4