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Fences are expensive. Avoid doing them when we're not in multithreaded mode.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73777 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2009-06-19 17:50:11 +00:00
parent 0c689c5e05
commit 94fefe27f5
1 changed files with 4 additions and 4 deletions
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8
include/llvm/Support/ManagedStatic.h
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@ -61,28 +61,28 @@ public:
// Accessors.
C &operator*() {
void* tmp = Ptr;
sys::MemoryFence();
if (llvm_is_multithreaded()) sys::MemoryFence();
if (!tmp) RegisterManagedStatic(object_creator<C>, object_deleter<C>);
return *static_cast<C*>(Ptr);
}
C *operator->() {
void* tmp = Ptr;
sys::MemoryFence();
if (llvm_is_multithreaded()) sys::MemoryFence();
if (!tmp) RegisterManagedStatic(object_creator<C>, object_deleter<C>);
return static_cast<C*>(Ptr);
}
const C &operator*() const {
void* tmp = Ptr;
sys::MemoryFence();
if (llvm_is_multithreaded()) sys::MemoryFence();
if (!tmp) RegisterManagedStatic(object_creator<C>, object_deleter<C>);
return *static_cast<C*>(Ptr);
}
const C *operator->() const {
void* tmp = Ptr;
sys::MemoryFence();
if (llvm_is_multithreaded()) sys::MemoryFence();
if (!tmp) RegisterManagedStatic(object_creator<C>, object_deleter<C>);
return static_cast<C*>(Ptr);