[OCaml] Reinstate data_layout

Expose LLVMCreateTargetMachineData as data_layout.

As r263530 did for go. From that commit: "LLVMGetTargetDataLayout was
removed from the C API, and then TargetMachine.TargetData was removed.
Later, LLVMCreateTargetMachineData was added to the C API"

Differential Revision: http://reviews.llvm.org/D18677

llvm-svn: 265115

llvm/bindings/ocaml/target/llvm_target.ml

@@ -121,6 +121,8 @@ module TargetMachine = struct
                = "llvm_targetmachine_cpu"
   external features : t -> string
                     = "llvm_targetmachine_features"
+  external data_layout : t -> DataLayout.t
+                       = "llvm_targetmachine_data_layout"
   external add_analysis_passes : [< Llvm.PassManager.any ] Llvm.PassManager.t -> t -> unit
                                = "llvm_targetmachine_add_analysis_passes"
   external set_verbose_asm : bool -> t -> unit

llvm/bindings/ocaml/target/llvm_target.mli

@@ -194,6 +194,9 @@ module TargetMachine : sig
       [llvm::TargetMachine::getCPU]. *)
   val cpu : t -> string
 
+  (** Returns the data layout of this target machine. *)
+  val data_layout : t -> DataLayout.t
+
   (** Returns the feature string used while creating this target machine. See
       [llvm::TargetMachine::getFeatureString]. *)
   val features : t -> string

llvm/bindings/ocaml/target/target_ocaml.c

@@ -296,6 +296,12 @@ CAMLprim value llvm_targetmachine_features(value Machine) {
                                 TargetMachine_val(Machine)));
 }
 
+/* TargetMachine.t -> DataLayout.t */
+CAMLprim value llvm_targetmachine_data_layout(value Machine) {
+  return llvm_alloc_data_layout(LLVMCreateTargetDataLayout(
+                                TargetMachine_val(Machine)));
+}
+
 /* bool -> TargetMachine.t -> unit */
 CAMLprim value llvm_targetmachine_set_verbose_asm(value Verb, value Machine) {
   LLVMSetTargetMachineAsmVerbosity(TargetMachine_val(Machine), Bool_val(Verb));

llvm/test/Bindings/OCaml/target.ml

@@ -81,6 +81,7 @@ let test_target_machine () =
   assert_equal (TM.triple machine) (Target.default_triple ());
   assert_equal (TM.cpu machine) "";
   assert_equal (TM.features machine) "";
+  ignore (TM.data_layout machine);
   TM.set_verbose_asm true machine;
   let pm = PassManager.create () in
   TM.add_analysis_passes pm machine