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XLC supports the same atomic functions as GCC, use them.

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Patch by Kai.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167309 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2012-11-02 20:54:45 +00:00
parent a307a1cf85
commit 986f29c7ba
1 changed files with 9 additions and 5 deletions
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14
lib/Support/Atomic.cpp
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@ -21,11 +21,15 @@ using namespace llvm;
#undef MemoryFence
#endif
#if defined(__GNUC__) || (defined(__IBMCPP__) && __IBMCPP__ >= 1210)
#define GNU_ATOMICS
#endif
void sys::MemoryFence() {
#if LLVM_HAS_ATOMICS == 0
return;
#else
# if defined(__GNUC__)
# if defined(GNU_ATOMICS)
__sync_synchronize();
# elif defined(_MSC_VER)
MemoryBarrier();
@ -43,7 +47,7 @@ sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
if (result == old_value)
*ptr = new_value;
return result;
#elif defined(__GNUC__)
#elif defined(GNU_ATOMICS)
return __sync_val_compare_and_swap(ptr, old_value, new_value);
#elif defined(_MSC_VER)
return InterlockedCompareExchange(ptr, new_value, old_value);
@ -56,7 +60,7 @@ sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
#if LLVM_HAS_ATOMICS == 0
++(*ptr);
return *ptr;
#elif defined(__GNUC__)
#elif defined(GNU_ATOMICS)
return __sync_add_and_fetch(ptr, 1);
#elif defined(_MSC_VER)
return InterlockedIncrement(ptr);
@ -69,7 +73,7 @@ sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
#if LLVM_HAS_ATOMICS == 0
--(*ptr);
return *ptr;
#elif defined(__GNUC__)
#elif defined(GNU_ATOMICS)
return __sync_sub_and_fetch(ptr, 1);
#elif defined(_MSC_VER)
return InterlockedDecrement(ptr);
@ -82,7 +86,7 @@ sys::cas_flag sys::AtomicAdd(volatile sys::cas_flag* ptr, sys::cas_flag val) {
#if LLVM_HAS_ATOMICS == 0
*ptr += val;
return *ptr;
#elif defined(__GNUC__)
#elif defined(GNU_ATOMICS)
return __sync_add_and_fetch(ptr, val);
#elif defined(_MSC_VER)
return InterlockedExchangeAdd(ptr, val) + val;