Index: llvm/trunk/bindings/ocaml/transforms/scalar_opts/llvm_scalar_opts.ml
===================================================================
--- llvm/trunk/bindings/ocaml/transforms/scalar_opts/llvm_scalar_opts.ml
+++ llvm/trunk/bindings/ocaml/transforms/scalar_opts/llvm_scalar_opts.ml
@@ -64,6 +64,9 @@
 external add_partially_inline_lib_calls
   : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
   = "llvm_add_partially_inline_lib_calls"
+external add_lower_atomic
+  : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
+  = "llvm_add_lower_atomic"
 external add_lower_switch
   : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
   = "llvm_add_lower_switch"
Index: llvm/trunk/bindings/ocaml/transforms/scalar_opts/llvm_scalar_opts.mli
===================================================================
--- llvm/trunk/bindings/ocaml/transforms/scalar_opts/llvm_scalar_opts.mli
+++ llvm/trunk/bindings/ocaml/transforms/scalar_opts/llvm_scalar_opts.mli
@@ -107,6 +107,11 @@
   : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
   = "llvm_add_partially_inline_lib_calls"
 
+(** See the [llvm::createLowerAtomicPass] function. *)
+external add_lower_atomic
+  : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
+  = "llvm_add_lower_atomic"
+
 (** See the [llvm::createLowerSwitchPass] function. *)
 external add_lower_switch
   : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
Index: llvm/trunk/bindings/ocaml/transforms/scalar_opts/scalar_opts_ocaml.c
===================================================================
--- llvm/trunk/bindings/ocaml/transforms/scalar_opts/scalar_opts_ocaml.c
+++ llvm/trunk/bindings/ocaml/transforms/scalar_opts/scalar_opts_ocaml.c
@@ -135,6 +135,12 @@
 }
 
 /* [<Llvm.PassManager.any] Llvm.PassManager.t -> unit */
+CAMLprim value llvm_add_lower_atomic(LLVMPassManagerRef PM) {
+  LLVMAddLowerAtomicPass(PM);
+  return Val_unit;
+}
+
+/* [<Llvm.PassManager.any] Llvm.PassManager.t -> unit */
 CAMLprim value llvm_add_lower_switch(LLVMPassManagerRef PM) {
   LLVMAddLowerSwitchPass(PM);
   return Val_unit;
Index: llvm/trunk/include/llvm-c/Transforms/Scalar.h
===================================================================
--- llvm/trunk/include/llvm-c/Transforms/Scalar.h
+++ llvm/trunk/include/llvm-c/Transforms/Scalar.h
@@ -92,6 +92,9 @@
 /** See llvm::createLoopUnswitchPass function. */
 void LLVMAddLoopUnswitchPass(LLVMPassManagerRef PM);
 
+/** See llvm::createLowerAtomicPass function. */
+void LLVMAddLowerAtomicPass(LLVMPassManagerRef PM);
+
 /** See llvm::createMemCpyOptPass function. */
 void LLVMAddMemCpyOptPass(LLVMPassManagerRef PM);
 
Index: llvm/trunk/lib/Transforms/Scalar/Scalar.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Scalar/Scalar.cpp
+++ llvm/trunk/lib/Transforms/Scalar/Scalar.cpp
@@ -194,6 +194,10 @@
   unwrap(PM)->add(createLoopUnswitchPass());
 }
 
+void LLVMAddLowerAtomicPass(LLVMPassManagerRef PM) {
+  unwrap(PM)->add(createLowerAtomicPass());
+}
+
 void LLVMAddMemCpyOptPass(LLVMPassManagerRef PM) {
   unwrap(PM)->add(createMemCpyOptPass());
 }