ocaml/C bindings: getmdstring, add num_op, get_op should work on metadata too

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141286 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 37 insertions, 0 deletions

diff --git a/bindings/ocaml/llvm/llvm.ml b/bindings/ocaml/llvm/llvm.ml
index e46ea040d9..f68ab8d842 100644
--- a/bindings/ocaml/llvm/llvm.ml
+++ b/bindings/ocaml/llvm/llvm.ml
@@ -281,6 +281,8 @@ external clear_metadata : llvalue -> int -> unit = "llvm_clear_metadata"
 (*--... Operations on metadata .......,.....................................--*)
 external mdstring : llcontext -> string -> llvalue = "llvm_mdstring"
 external mdnode : llcontext -> llvalue array -> llvalue = "llvm_mdnode"
+external get_mdstring : llvalue -> string option = "llvm_get_mdstring"
+external get_named_metadata : llmodule -> string -> llvalue array = "llvm_get_namedmd"
 
 (*--... Operations on scalar constants .....................................--*)
 external const_int : lltype -> int -> llvalue = "llvm_const_int"
diff --git a/bindings/ocaml/llvm/llvm.mli b/bindings/ocaml/llvm/llvm.mli
index c070170134..b4b9622b63 100644
--- a/bindings/ocaml/llvm/llvm.mli
+++ b/bindings/ocaml/llvm/llvm.mli
@@ -571,6 +571,14 @@ val mdstring : llcontext -> string -> llvalue
     See the method [llvm::MDNode::get]. *)
 val mdnode : llcontext -> llvalue array -> llvalue
 
+(** [get_mdstring v] returns the MDString.
+ * See the method [llvm::MDString::getString] *)
+val get_mdstring : llvalue -> string option
+
+(** [get_named_metadata m name] return all the MDNodes belonging to the named
+ * metadata (if any).
+ * See the method [llvm::NamedMDNode::getOperand]. *)
+val get_named_metadata : llmodule -> string -> llvalue array
 
 (** {7 Operations on scalar constants} *)
 
diff --git a/bindings/ocaml/llvm/llvm_ocaml.c b/bindings/ocaml/llvm/llvm_ocaml.c
index 28f0977aba..14bdbdd068 100644
--- a/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/bindings/ocaml/llvm/llvm_ocaml.c
@@ -24,6 +24,7 @@
 #include "llvm/Config/config.h"
 #include <assert.h>
 #include <stdlib.h>
+#include <string.h>
 
 
 /* Can't use the recommended caml_named_value mechanism for backwards
@@ -468,6 +469,32 @@ CAMLprim LLVMValueRef llvm_mdnode(LLVMContextRef C, value ElementVals) {
                              Wosize_val(ElementVals));
 }
 
+/* llvalue -> string option */
+CAMLprim value llvm_get_mdstring(LLVMValueRef V) {
+    CAMLparam0();
+    const char *S;
+    unsigned Len;
+
+    if ((S = LLVMGetMDString(V, &Len))) {
+	CAMLlocal2(Option, Str);
+
+	Str = caml_alloc_string(Len);
+	memcpy(String_val(Str), S, Len);
+	Option = alloc(1,0);
+	Store_field(Option, 0, Str);
+	CAMLreturn(Option);
+    }
+    CAMLreturn(Val_int(0));
+}
+
+CAMLprim value llvm_get_namedmd(LLVMModuleRef M, value name)
+{
+  CAMLparam1(name);
+  CAMLlocal1(Nodes);
+  Nodes = alloc(LLVMGetNamedMetadataNumOperands(M, String_val(name)), 0);
+  LLVMGetNamedMetadataOperands(M, String_val(name), (LLVMValueRef *) Nodes);
+  CAMLreturn(Nodes);
+}
 /*--... Operations on scalar constants .....................................--*/
 
 /* lltype -> int -> llvalue */