[llvm] r228395 - [OCaml] Add Llvm.build_empty_phi.

[Peter Zotov]

Author: whitequark
Date: Fri Feb  6 07:42:03 2015
New Revision: 228395

URL: http://llvm.org/viewvc/llvm-project?rev=228395&view=rev
Log:
[OCaml] Add Llvm.build_empty_phi.

Modified:
    llvm/trunk/bindings/ocaml/llvm/llvm.ml
    llvm/trunk/bindings/ocaml/llvm/llvm.mli
    llvm/trunk/bindings/ocaml/llvm/llvm_ocaml.c
    llvm/trunk/test/Bindings/OCaml/core.ml

Modified: llvm/trunk/bindings/ocaml/llvm/llvm.ml
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/bindings/ocaml/llvm/llvm.ml?rev=228395&r1=228394&r2=228395&view=diff
==============================================================================
--- llvm/trunk/bindings/ocaml/llvm/llvm.ml (original)
+++ llvm/trunk/bindings/ocaml/llvm/llvm.ml Fri Feb  6 07:42:03 2015
@@ -1300,6 +1300,8 @@ external build_fcmp : Fcmp.t -> llvalue
 (*--... Miscellaneous instructions .........................................--*)
 external build_phi : (llvalue * llbasicblock) list -> string -> llbuilder ->
                      llvalue = "llvm_build_phi"
+external build_empty_phi : lltype -> string -> llbuilder -> llvalue
+                         = "llvm_build_empty_phi"
 external build_call : llvalue -> llvalue array -> string -> llbuilder -> llvalue
                     = "llvm_build_call"
 external build_select : llvalue -> llvalue -> llvalue -> string -> llbuilder ->

Modified: llvm/trunk/bindings/ocaml/llvm/llvm.mli
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/bindings/ocaml/llvm/llvm.mli?rev=228395&r1=228394&r2=228395&view=diff
==============================================================================
--- llvm/trunk/bindings/ocaml/llvm/llvm.mli (original)
+++ llvm/trunk/bindings/ocaml/llvm/llvm.mli Fri Feb  6 07:42:03 2015
@@ -2422,6 +2422,12 @@ val build_fcmp : Fcmp.t -> llvalue -> ll
 val build_phi : (llvalue * llbasicblock) list -> string -> llbuilder ->
                      llvalue
 
+(** [build_empty_phi ty name b] creates a
+    [%name = phi %ty] instruction at the position specified by
+    the instruction builder [b]. [ty] is the type of the instruction.
+    See the method [llvm::LLVMBuilder::CreatePHI]. *)
+val build_empty_phi : lltype -> string -> llbuilder -> llvalue
+
 (** [build_call fn args name b] creates a
     [%name = call %fn(args...)]
     instruction at the position specified by the instruction builder [b].

Modified: llvm/trunk/bindings/ocaml/llvm/llvm_ocaml.c
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/bindings/ocaml/llvm/llvm_ocaml.c?rev=228395&r1=228394&r2=228395&view=diff
==============================================================================
--- llvm/trunk/bindings/ocaml/llvm/llvm_ocaml.c (original)
+++ llvm/trunk/bindings/ocaml/llvm/llvm_ocaml.c Fri Feb  6 07:42:03 2015
@@ -2191,6 +2191,15 @@ CAMLprim LLVMValueRef llvm_build_phi(val
   return PhiNode;
 }
 
+/* lltype -> string -> llbuilder -> value */
+CAMLprim LLVMValueRef llvm_build_empty_phi(LLVMTypeRef Type, value Name, value B) {
+  LLVMValueRef PhiNode;
+
+  return LLVMBuildPhi(Builder_val(B), Type, String_val(Name));
+
+  return PhiNode;
+}
+
 /* llvalue -> llvalue array -> string -> llbuilder -> llvalue */
 CAMLprim LLVMValueRef llvm_build_call(LLVMValueRef Fn, value Params,
                                       value Name, value B) {

Modified: llvm/trunk/test/Bindings/OCaml/core.ml
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Bindings/OCaml/core.ml?rev=228395&r1=228394&r2=228395&view=diff
==============================================================================
--- llvm/trunk/test/Bindings/OCaml/core.ml (original)
+++ llvm/trunk/test/Bindings/OCaml/core.ml Fri Feb  6 07:42:03 2015
@@ -1428,6 +1428,15 @@ let test_builder () =
     add_incoming (p2, b2) phi;
     insist ([(p1, b1); (p2, b2)] = incoming phi);
 
+    (* CHECK: %PhiEmptyNode = phi i8
+     *)
+    let phi_empty = build_empty_phi i8_type "PhiEmptyNode" at_jb in
+    insist ([] = incoming phi_empty);
+
+    (* can't emit an empty phi to bitcode *)
+    add_incoming (const_int i8_type 1, b1) phi_empty;
+    add_incoming (const_int i8_type 2, b2) phi_empty;
+
     ignore (build_unreachable at_jb);
   end