From e337bf303dde9258bc7e2c87722a270fed96460b Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Fri, 9 Nov 2012 12:54:37 +0000
Subject: tsan: add __tsan_atomicX_compare_exchange_val() function It's easier
 to call from compiler module.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@167611 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/tsan/rtl/tsan_interface_atomic.cc | 26 ++++++++++++++++++++++++++
 lib/tsan/rtl/tsan_interface_atomic.h  | 13 +++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/lib/tsan/rtl/tsan_interface_atomic.cc b/lib/tsan/rtl/tsan_interface_atomic.cc
index 83b5d2577..b521fd557 100644
--- a/lib/tsan/rtl/tsan_interface_atomic.cc
+++ b/lib/tsan/rtl/tsan_interface_atomic.cc
@@ -189,6 +189,13 @@ static bool AtomicCAS(ThreadState *thr, uptr pc,
   return false;
 }
 
+template<typename T>
+static T AtomicCAS(ThreadState *thr, uptr pc,
+    volatile T *a, T c, T v, morder mo) {
+  AtomicCAS(thr, pc, a, &c, v, mo);
+  return c;
+}
+
 static void AtomicFence(ThreadState *thr, uptr pc, morder mo) {
   __sync_synchronize();
 }
@@ -361,6 +368,25 @@ int __tsan_atomic64_compare_exchange_weak(volatile a64 *a, a64 *c, a64 v,
   SCOPED_ATOMIC(CAS, a, c, v, mo);
 }
 
+a8 __tsan_atomic8_compare_exchange_val(volatile a8 *a, a8 c, a8 v,
+    morder mo) {
+  SCOPED_ATOMIC(CAS, a, c, v, mo);
+}
+a16 __tsan_atomic16_compare_exchange_val(volatile a16 *a, a16 c, a16 v,
+    morder mo) {
+  SCOPED_ATOMIC(CAS, a, c, v, mo);
+}
+
+a32 __tsan_atomic32_compare_exchange_val(volatile a32 *a, a32 c, a32 v,
+    morder mo) {
+  SCOPED_ATOMIC(CAS, a, c, v, mo);
+}
+
+a64 __tsan_atomic64_compare_exchange_val(volatile a64 *a, a64 c, a64 v,
+    morder mo) {
+  SCOPED_ATOMIC(CAS, a, c, v, mo);
+}
+
 void __tsan_atomic_thread_fence(morder mo) {
   char* a;
   SCOPED_ATOMIC(Fence, mo);
diff --git a/lib/tsan/rtl/tsan_interface_atomic.h b/lib/tsan/rtl/tsan_interface_atomic.h
index 2fa002197..d5c628275 100644
--- a/lib/tsan/rtl/tsan_interface_atomic.h
+++ b/lib/tsan/rtl/tsan_interface_atomic.h
@@ -123,6 +123,19 @@ int __tsan_atomic32_compare_exchange_strong(volatile __tsan_atomic32 *a,
 int __tsan_atomic64_compare_exchange_strong(volatile __tsan_atomic64 *a,
     __tsan_atomic64 *c, __tsan_atomic64 v, __tsan_memory_order mo);
 
+__tsan_atomic8 __tsan_atomic8_compare_exchange_val(
+    volatile __tsan_atomic8 *a, __tsan_atomic8 c, __tsan_atomic8 v,
+    __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_compare_exchange_val(
+    volatile __tsan_atomic16 *a, __tsan_atomic16 c, __tsan_atomic16 v,
+    __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_compare_exchange_val(
+    volatile __tsan_atomic32 *a, __tsan_atomic32 c, __tsan_atomic32 v,
+    __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_compare_exchange_val(
+    volatile __tsan_atomic64 *a, __tsan_atomic64 c, __tsan_atomic64 v,
+    __tsan_memory_order mo);
+
 void __tsan_atomic_thread_fence(__tsan_memory_order mo);
 void __tsan_atomic_signal_fence(__tsan_memory_order mo);
 
-- 
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