Import LLVM r73984.

It seems I keep importing sources at very unlucky moments. Let's see
what this revision of LLVM does.

1 files changed, 31 insertions, 6 deletions

diff --git a/lib/System/Atomic.cpp b/lib/System/Atomic.cpp
index 416f981..fda2708 100644
--- a/lib/System/Atomic.cpp
+++ b/lib/System/Atomic.cpp
@@ -35,11 +35,11 @@ void sys::MemoryFence() {
 #endif
 }
 
-sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
-                                  sys::cas_flag new_value,
-                                  sys::cas_flag old_value) {
+uint32_t sys::CompareAndSwap32(volatile uint32_t* ptr,
+                               uint32_t new_value,
+                               uint32_t old_value) {
 #if LLVM_MULTITHREADED==0
-  sys::cas_flag result = *ptr;
+  uint32_t result = *ptr;
   if (result == old_value)
     *ptr = new_value;
   return result;
@@ -52,7 +52,7 @@ sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
 #endif
 }
 
-sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
+int32_t sys::AtomicIncrement32(volatile int32_t* ptr) {
 #if LLVM_MULTITHREADED==0
   ++(*ptr);
   return *ptr;
@@ -65,7 +65,7 @@ sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
 #endif
 }
 
-sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
+int32_t sys::AtomicDecrement32(volatile int32_t* ptr) {
 #if LLVM_MULTITHREADED==0
   --(*ptr);
   return *ptr;
@@ -78,4 +78,29 @@ sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
 #endif
 }
 
+int32_t sys::AtomicAdd32(volatile int32_t* ptr, int32_t val) {
+#if LLVM_MULTITHREADED==0
+  *ptr += val;
+  return *ptr;
+#elif defined(__GNUC__)
+  return __sync_add_and_fetch(ptr, val);
+#elif defined(_MSC_VER)
+  return InterlockedAdd(ptr, val);
+#else
+#  error No atomic add implementation for your platform!
+#endif
+}
+
+int64_t sys::AtomicAdd64(volatile int64_t* ptr, int64_t val) {
+#if LLVM_MULTITHREADED==0
+  *ptr += val;
+  return *ptr;
+#elif defined(__GNUC__)
+  return __sync_add_and_fetch(ptr, val);
+#elif defined(_MSC_VER)
+  return InterlockedAdd64(ptr, val);
+#else
+#  error No atomic add implementation for your platform!
+#endif
+}