implement __sync_synchronize and __sync_lock_release,

rdar://6880573


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71637 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 21 insertions, 3 deletions

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index bddbf4ca42..93901fd535 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -470,11 +470,23 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
   case Builtin::BI__sync_lock_release_2:
   case Builtin::BI__sync_lock_release_4:
   case Builtin::BI__sync_lock_release_8:
-  case Builtin::BI__sync_lock_release_16:
-    assert(0 && "FIXME: Implement");
+  case Builtin::BI__sync_lock_release_16: {
+    Value *Ptr = EmitScalarExpr(E->getArg(0));
+    const llvm::Type *ElTy =
+      cast<llvm::PointerType>(Ptr->getType())->getElementType();
+    Builder.CreateStore(llvm::Constant::getNullValue(ElTy), Ptr, true);
+    return RValue();
+  }
 
+  case Builtin::BI__sync_synchronize: {
+    Value *C[5];
+    C[0] = C[1] = C[2] = C[3] = llvm::ConstantInt::get(llvm::Type::Int1Ty, 1);
+    C[4] = ConstantInt::get(llvm::Type::Int1Ty, 0);
+    Builder.CreateCall(CGM.getIntrinsic(Intrinsic::memory_barrier), C, C + 5);
+    return RValue();
+  }
+      
     // Library functions with special handling.
-
   case Builtin::BIsqrt:
   case Builtin::BIsqrtf:
   case Builtin::BIsqrtl: {
diff --git a/test/CodeGen/atomic.c b/test/CodeGen/atomic.c
index 12a9910223..09e3bf03a4 100644
--- a/test/CodeGen/atomic.c
+++ b/test/CodeGen/atomic.c
@@ -33,15 +33,21 @@ int atomic(void)
   old = __sync_fetch_and_and(&val, 0x9);
   old = __sync_fetch_and_or(&val, 0xa);
   old = __sync_fetch_and_xor(&val, 0xb);
+  old = __sync_fetch_and_nand(&val, 0xb);
 
   old = __sync_add_and_fetch(&val, 1);
   old = __sync_sub_and_fetch(&val, 2);
   old = __sync_and_and_fetch(&valc, 3);
   old = __sync_or_and_fetch(&valc, 4);
   old = __sync_xor_and_fetch(&valc, 5);
+  old = __sync_nand_and_fetch(&valc, 5);
 
   
   __sync_val_compare_and_swap((void **)0, (void *)0, (void *)0);
 
+  
+  __sync_lock_release(&val);
+  __sync_synchronize ();
+
   return old;
 }