From f7af931930dfab74b8a72b195e53df34b4ea2480 Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <idadesub@users.sourceforge.net>
Date: Fri, 20 Aug 2010 14:51:22 +0000
Subject: [PATCH] Expose LLVMSetOperand and LLVMGetNumOperands to llvm-c and
 ocaml.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111625 91177308-0d34-0410-b5e6-96231b3b80d8
---
 bindings/ocaml/llvm/llvm.ml      |  2 ++
 bindings/ocaml/llvm/llvm.mli     |  8 ++++++++
 bindings/ocaml/llvm/llvm_ocaml.c | 11 +++++++++++
 include/llvm-c/Core.h            |  2 ++
 lib/VMCore/Core.cpp              |  8 ++++++++
 test/Bindings/Ocaml/vmcore.ml    |  7 +++++++
 6 files changed, 38 insertions(+)

diff --git a/bindings/ocaml/llvm/llvm.ml b/bindings/ocaml/llvm/llvm.ml
index 7ab6f51efb9..e0c168a2d9d 100644
--- a/bindings/ocaml/llvm/llvm.ml
+++ b/bindings/ocaml/llvm/llvm.ml
@@ -280,6 +280,8 @@ let fold_right_uses f v init =
 
 (*--... Operations on users ................................................--*)
 external operand : llvalue -> int -> llvalue = "llvm_operand"
+external set_operand : llvalue -> int -> llvalue -> unit = "llvm_set_operand"
+external num_operands : llvalue -> int = "llvm_num_operands"
 
 (*--... Operations on constants of (mostly) any type .......................--*)
 external is_constant : llvalue -> bool = "llvm_is_constant"
diff --git a/bindings/ocaml/llvm/llvm.mli b/bindings/ocaml/llvm/llvm.mli
index 742265cd3d5..2f9e83797f0 100644
--- a/bindings/ocaml/llvm/llvm.mli
+++ b/bindings/ocaml/llvm/llvm.mli
@@ -557,6 +557,14 @@ val fold_right_uses : (lluse -> 'a -> 'a) -> llvalue -> 'a -> 'a
     method [llvm::User::getOperand]. *)
 external operand : llvalue -> int -> llvalue = "llvm_operand"
 
+(** [set_operand v i o] sets the operand of the value [v] at the index [i] to
+    the value [o].
+    See the method [llvm::User::setOperand]. *)
+external set_operand : llvalue -> int -> llvalue -> unit = "llvm_set_operand"
+
+(** [num_operands v] returns the number of operands for the value [v].
+    See the method [llvm::User::getNumOperands]. *)
+external num_operands : llvalue -> int = "llvm_num_operands"
 
 (** {7 Operations on constants of (mostly) any type} *)
 
diff --git a/bindings/ocaml/llvm/llvm_ocaml.c b/bindings/ocaml/llvm/llvm_ocaml.c
index 2caa3876dc4..d25d2942d14 100644
--- a/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/bindings/ocaml/llvm/llvm_ocaml.c
@@ -452,6 +452,17 @@ CAMLprim LLVMValueRef llvm_operand(LLVMValueRef V, value I) {
   return LLVMGetOperand(V, Int_val(I));
 }
 
+/* llvalue -> int -> llvalue -> unit */
+CAMLprim value llvm_set_operand(LLVMValueRef U, value I, LLVMValueRef V) {
+  LLVMSetOperand(U, Int_val(I), V);
+  return Val_unit;
+}
+
+/* llvalue -> int */
+CAMLprim value llvm_num_operands(LLVMValueRef V) {
+  return Val_int(LLVMGetNumOperands(V));
+}
+
 /*--... Operations on constants of (mostly) any type .......................--*/
 
 /* llvalue -> bool */
diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index 99de9e33987..665dd0447c9 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -523,6 +523,8 @@ LLVMValueRef LLVMGetUsedValue(LLVMUseRef U);
 
 /* Operations on Users */
 LLVMValueRef LLVMGetOperand(LLVMValueRef Val, unsigned Index);
+void LLVMSetOperand(LLVMValueRef User, unsigned Index, LLVMValueRef Val);
+int LLVMGetNumOperands(LLVMValueRef Val);
 
 /* Operations on constants of any type */
 LLVMValueRef LLVMConstNull(LLVMTypeRef Ty); /* all zeroes */
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index e42a68baff9..f458051c31c 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -489,6 +489,14 @@ LLVMValueRef LLVMGetOperand(LLVMValueRef Val, unsigned Index) {
   return wrap(unwrap<User>(Val)->getOperand(Index));
 }
 
+void LLVMSetOperand(LLVMValueRef Val, unsigned Index, LLVMValueRef Op) {
+  unwrap<User>(Val)->setOperand(Index, unwrap(Op));
+}
+
+int LLVMGetNumOperands(LLVMValueRef Val) {
+  return unwrap<User>(Val)->getNumOperands();
+}
+
 /*--.. Operations on constants of any type .................................--*/
 
 LLVMValueRef LLVMConstNull(LLVMTypeRef Ty) {
diff --git a/test/Bindings/Ocaml/vmcore.ml b/test/Bindings/Ocaml/vmcore.ml
index ba8c6962a55..2894637e2b8 100644
--- a/test/Bindings/Ocaml/vmcore.ml
+++ b/test/Bindings/Ocaml/vmcore.ml
@@ -642,11 +642,18 @@ let test_users () =
 
   let p1 = param fn 0 in
   let p2 = param fn 1 in
+  let a3 = build_alloca i32_type "user_alloca" b in
+  let p3 = build_load a3 "user_load" b in
   let i = build_add p1 p2 "sum" b in
 
+  insist ((num_operands i) = 2);
   insist ((operand i 0) = p1);
   insist ((operand i 1) = p2);
 
+  set_operand i 1 p3;
+  insist ((operand i 1) != p2);
+  insist ((operand i 1) = p3);
+
   ignore (build_unreachable b)
 
 
-- 
2.34.1