[OCaml] Initialize local roots prior to raising.

On 4.02, the OCaml unwinder otherwise gets confused and segfaults.

llvm-svn: 221142

diff --git a/llvm/bindings/ocaml/llvm/llvm_ocaml.c b/llvm/bindings/ocaml/llvm/llvm_ocaml.c
index b43b375..d868288 100644 (file)
--- a/llvm/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/llvm/bindings/ocaml/llvm/llvm_ocaml.c
@@ -1590,11 +1590,12 @@ CAMLprim value llvm_position_builder(value Pos, value B) {
 }
 
 /* llbuilder -> llbasicblock */
-CAMLprim LLVMBasicBlockRef llvm_insertion_block(value B) {
+CAMLprim value llvm_insertion_block(value B) {
+  CAMLparam0();
   LLVMBasicBlockRef InsertBlock = LLVMGetInsertBlock(Builder_val(B));
   if (!InsertBlock)
-    raise_not_found();
-  return InsertBlock;
+    caml_raise_not_found();
+  CAMLreturn((value) InsertBlock);
 }
 
 /* llvalue -> string -> llbuilder -> unit */