From 6ba5c56cf5b1609ec4af45f4901118865a8ed9b6 Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <idadesub@users.sourceforge.net>
Date: Sun, 28 Feb 2010 20:44:58 +0000
Subject: [PATCH] Add support for global aliases to ocaml.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97413 91177308-0d34-0410-b5e6-96231b3b80d8
---
 bindings/ocaml/llvm/llvm.ml      | 4 ++++
 bindings/ocaml/llvm/llvm.mli     | 9 +++++++++
 bindings/ocaml/llvm/llvm_ocaml.c | 7 +++++++
 test/Bindings/Ocaml/vmcore.ml    | 9 +++++++++
 4 files changed, 29 insertions(+)

diff --git a/bindings/ocaml/llvm/llvm.ml b/bindings/ocaml/llvm/llvm.ml
index 92bfef51d03..48f649a3cfc 100644
--- a/bindings/ocaml/llvm/llvm.ml
+++ b/bindings/ocaml/llvm/llvm.ml
@@ -444,6 +444,10 @@ let rec fold_right_global_range f i e init =
 let fold_right_globals f m init =
   fold_right_global_range f (global_end m) (At_start m) init
 
+(*--... Operations on aliases ..............................................--*)
+external add_alias : llmodule -> lltype -> llvalue -> string -> llvalue
+                   = "llvm_add_alias"
+
 (*--... Operations on functions ............................................--*)
 external declare_function : string -> lltype -> llmodule -> llvalue
                           = "llvm_declare_function"
diff --git a/bindings/ocaml/llvm/llvm.mli b/bindings/ocaml/llvm/llvm.mli
index c8c48f3c537..3413a646609 100644
--- a/bindings/ocaml/llvm/llvm.mli
+++ b/bindings/ocaml/llvm/llvm.mli
@@ -1140,6 +1140,15 @@ external is_thread_local : llvalue -> bool = "llvm_is_thread_local"
 external set_thread_local : bool -> llvalue -> unit = "llvm_set_thread_local"
 
 
+(** {7 Operations on aliases} *)
+
+(** [add_alias m t a n] inserts an alias in the module [m] with the type [t] and
+    the aliasee [a] with the name [n].
+    See the constructor for [llvm::GlobalAlias]. *)
+external add_alias : llmodule -> lltype -> llvalue -> string -> llvalue
+                   = "llvm_add_alias"
+
+
 (** {7 Operations on functions} *)
 
 (** [declare_function name ty m] returns a new function of type [ty] and
diff --git a/bindings/ocaml/llvm/llvm_ocaml.c b/bindings/ocaml/llvm/llvm_ocaml.c
index 000db054494..78cf6e43685 100644
--- a/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/bindings/ocaml/llvm/llvm_ocaml.c
@@ -807,6 +807,13 @@ CAMLprim value llvm_set_global_constant(value Flag, LLVMValueRef GlobalVar) {
   return Val_unit;
 }
 
+/*--... Operations on aliases ..............................................--*/
+
+CAMLprim LLVMValueRef llvm_add_alias(LLVMModuleRef M, LLVMTypeRef Ty,
+                                     LLVMValueRef Aliasee, value Name) {
+  return LLVMAddAlias(M, Ty, Aliasee, String_val(Name));
+}
+
 /*--... Operations on functions ............................................--*/
 
 DEFINE_ITERATORS(function, Function, LLVMModuleRef, LLVMValueRef,
diff --git a/test/Bindings/Ocaml/vmcore.ml b/test/Bindings/Ocaml/vmcore.ml
index 40747f36111..1b7200b19f4 100644
--- a/test/Bindings/Ocaml/vmcore.ml
+++ b/test/Bindings/Ocaml/vmcore.ml
@@ -606,6 +606,14 @@ let test_global_variables () =
     dispose_module m
   end
 
+(*===-- Aliases -----------------------------------------------------------===*)
+
+let test_aliases () =
+  (* RUN: grep {@alias = alias i32\\* @aliasee} < %t.ll
+   *)
+  let v = declare_global i32_type "aliasee" m in
+  ignore (add_alias m (pointer_type i32_type) v "alias")
+
 
 (*===-- Functions ---------------------------------------------------------===*)
 
@@ -1265,6 +1273,7 @@ let _ =
   suite "constants"        test_constants;
   suite "global values"    test_global_values;
   suite "global variables" test_global_variables;
+  suite "aliases"          test_aliases;
   suite "functions"        test_functions;
   suite "params"           test_params;
   suite "basic blocks"     test_basic_blocks;
-- 
2.34.1