Initial implementation of 'fence' instruction, the new C++0x-style replacement for llvm.memory.barrier.

This is just a LangRef entry and reading/writing/memory representation; optimizer+codegen support coming soon.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136009 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 5 insertions, 0 deletions

diff --git a/include/llvm/Support/IRBuilder.h b/include/llvm/Support/IRBuilder.h
index caabbb9..0a2800e 100644
--- a/include/llvm/Support/IRBuilder.h
+++ b/include/llvm/Support/IRBuilder.h
@@ -762,6 +762,10 @@ public:
   StoreInst *CreateStore(Value *Val, Value *Ptr, bool isVolatile = false) {
     return Insert(new StoreInst(Val, Ptr, isVolatile));
   }
+  FenceInst *CreateFence(AtomicOrdering Ordering,
+                         SynchronizationScope SynchScope = CrossThread) {
+    return Insert(new FenceInst(Context, Ordering, SynchScope));
+  }
   Value *CreateGEP(Value *Ptr, ArrayRef<Value *> IdxList,
                    const Twine &Name = "") {
     if (Constant *PC = dyn_cast<Constant>(Ptr)) {
diff --git a/include/llvm/Support/InstVisitor.h b/include/llvm/Support/InstVisitor.h
index b2e5d58..83b26f5 100644
--- a/include/llvm/Support/InstVisitor.h
+++ b/include/llvm/Support/InstVisitor.h
@@ -169,6 +169,7 @@ public:
   RetTy visitAllocaInst(AllocaInst &I)              { DELEGATE(Instruction); }
   RetTy visitLoadInst(LoadInst     &I)              { DELEGATE(Instruction); }
   RetTy visitStoreInst(StoreInst   &I)              { DELEGATE(Instruction); }
+  RetTy visitFenceInst(FenceInst   &I)              { DELEGATE(Instruction); }
   RetTy visitGetElementPtrInst(GetElementPtrInst &I){ DELEGATE(Instruction); }
   RetTy visitPHINode(PHINode       &I)              { DELEGATE(Instruction); }
   RetTy visitTruncInst(TruncInst &I)                { DELEGATE(CastInst); }